JP6476736B2 - Keyboard device - Google Patents

Description

  The present invention relates to a keyboard apparatus in which rear ends of a plurality of keys are respectively supported by a key frame so that front ends of the plurality of keys can be moved in the vertical direction.

  Conventionally, in a keyboard apparatus in which the rear end portions of a plurality of keys are supported by a key frame, and the front end portions of the plurality of keys can be swung in the vertical direction, the lateral movement of the front end portions during the swinging of the plurality of keys is prevented. In order to prevent this, it is well known to guide the vertical movement of a plurality of keys. For example, in Patent Document 1 below, a flat key-side guide member that protrudes rearward from the inner surface of the front wall of the key is provided, and the front side is positioned at a position facing the key-side guide member on the upper surface of the key frame. A key guide mechanism which is opened and has a frame side guide member having left and right side walls whose cross-sectional shape is U-shaped and protrudes upward so that the key side guide member enters between the left and right side walls of the frame side guide member. It is shown.

JP 2007-264057 A

  However, in the above conventional keyboard device, since the clearance between the key side guide member and the frame side guide member is set small, it is difficult to assemble the key to the key frame. In particular, when a plurality of keys are integrally formed, it is difficult to assemble a plurality of keys into a key frame at the same time. Further, when the key side guide member is forcibly pushed into the frame side guide member, the key side guide member and the frame side guide member interfere with each other, and the key side guide member and the frame side guide member are deformed. There was also a problem.

  The present invention has been made to cope with such a problem, and an object of the present invention is to make it easy to assemble a key to a key frame and to deform the key side guide member and the frame side guide member due to the ease of assembly. It is an object of the present invention to provide a keyboard device that prevents the above-described problem. In the description of each constituent element of the present invention below, the reference numerals of corresponding portions of the embodiment are shown in parentheses in order to facilitate understanding of the present invention. The present invention should not be construed as being limited to the configurations of the corresponding portions indicated by the reference numerals of the forms.

In order to achieve the above-mentioned object, the feature of the present invention is that a plurality of keys (21, 31, 41) and a key frame (10) supporting the rear ends of the plurality of keys are provided. In a keyboard device in which the front end portions of a plurality of keys are rocked in the vertical direction during pressing and releasing operations , a key side guide member is provided for each key, and a frame side guide member corresponding to each key side guide member is provided in the key frame Each of the key-side guide members and one guide member (14) of each frame-side guide member includes left and right outer surfaces (14c, 14d) extending in the front-rear direction and one of the front-rear direction members. A groove (14f) having left and right inner surfaces extending in the front-rear direction is provided on the end surface, and the other guide members (24, 34, 45) of the key side guide members and the frame side guide members have left and right inner surfaces. Left of one guide member It has left and right side walls (24b, 24c, 34b, 34c, 45b, 45c) that oppose the outer surface and allows one guide member to enter, and has left and right outer surfaces that extend in the front-rear direction between the left and right side walls. And a protruding portion (24d, 24d ′, 34d, 34d ′, 45d, 45d ′) that enters the groove with the left and right outer surfaces facing the left and right inner surfaces of the groove, and the groove of one guide member and the other A key guide that has a predetermined clearance between the protruding portion of the guide member and guides the rocking of the key in the vertical direction when the key is pressed and released by the groove of one guide member and the protruding portion of the other guide member. A clearance larger than the predetermined clearance between the left and right side walls of the other guide member and the left and right outer surfaces of the one guide member, and the left and right side walls of the other guide member and the one guide member Left and right outside When the key is assembled to the key frame, the position of the key in the horizontal direction with respect to the key frame is restricted, and before the key guide unit is in a state of guiding the vertical swing of the key during the key release operation. A pre-guide portion that guides the operation of assembling the key to the key frame, and the end of the protruding portion that enters into the groove when the key is assembled to the key frame is connected to the key frame of the key. When assembling, the end on the side where one guide member enters the left and right side walls is positioned a predetermined distance away from the direction in which the protrusion enters the groove. is there.
In this case, the cross-sectional shape of one guide member and the groove is rectangular, and the other guide member has connection walls (24a, 34a, 45a) that connect one end of the left and right side walls, and connects the protrusions. It is good to project from the wall in the extending direction of the left and right side walls.

In the feature of the present invention configured as described above, when assembling the key to the key frame, the key is tilted so that the rear end of the key is positioned above the front end. After approaching the frame, the key side guide member is engaged with the frame side guide member from the front or the top. When the key-side guide member is engaged with the frame-side guide member from the front, the key-side guide member is moved backward while keeping the tilted state, and the key-side guide member is adjusted while adjusting the position of the key in the left-right direction. It is approached from the front member, while initially engaging the key-side guide member to the frame side guide member Te to the pre-guide unit further moved backward keys. Then, before the key guide part is in a state to guide the swinging in the vertical direction of the key at the time of key depression and key release operation, by slightly moving the key in the left-right direction, the key-side guide member Te key guide part on the frame side After the engagement, the key is moved further backward, and the rear end of the key is moved downward to assemble the key to the key frame. On the other hand, when the key-side guide member is engaged with the frame-side guide member from above, the rear end of the key is moved downward while adjusting the position of the key in the left-right direction, and the key-side guide member is moved to the frame-side guide member. in it made to approach from above, first with a key-side guide member engaged with the frame side guide member Te to the pre-guide unit further moves downward to the rear end portion of the key. Then, before the key guide part is in a state to guide the swinging in the vertical direction of the key at the time of key depression and key release operation, slightly moving the key in the left-right direction, the key Te key guide portion side guide member frame side guide After engaging the member, the rear end of the key is moved further downward, and the key is moved backward to assemble the key to the key frame.

In such keyboard apparatus keys are assembled to the key frame and the clearance of pre-guide portion is larger than the clearance of the key guide part, because the clearance of the pre-guide portion can to some extent, the key-side Te to the pre-guide portion Engaging the guide member with the frame side guide member is a simple operation. Then, before the key guide part is in a state to guide the swinging in the vertical direction of the key at the time of key depression and key release operation, the position in the lateral direction of the key-side guide member is thus regulated to the pre-guide portion. Therefore, it is possible to reduce the amount of adjustment of the lateral position of the key to the key guide part Te engage the key-side guide member to the frame side guide member, the key-side guide member Te key guide part on the frame side guide member The operation to engage is also simplified. As a result, according to the features of the present invention, the work of assembling the key to the key frame is simplified even if the clearance of the key guide portion is reduced in order to prevent the lateral movement of the key during the key release operation. And the deformation | transformation of the member which comprises a key guide part is also prevented by this ease of assembly | attachment.

Another feature of the present invention, the end portions of the left and right outer surfaces of the one guide member on the side which enters at the time of assembling to the key frame of the key into the right and left side walls of the other guide member, its left and right end portions Are provided on the end portions of the left and right side walls of the other guide member on the side where one guide member is intruded when the key is assembled to the key frame, or the inclined surface (14g, 14h, 14m, 14n) is provided. There are provided inclined surfaces (24e, 24f, 34e, 34f, 45e, 45f, 24i, 24j, 34i, 34j, 45i, 45j) in which the left and right inner side surfaces are notched.

In another aspect of the present invention, the inclined surfaces provided at the ends of the left and right outer surfaces of one guide member or the ends of the left and right side walls of the other guide member are such that the left and right outer surfaces of one guide member are the other. The sub-guide function before entering the left and right side walls of the guide member is exhibited. Thus, according to another feature of the present invention, when assembled to the key frame of the key, the operation of engaging the frame side guide member the key-side guide member Te to the pre-guide portion becomes easier. Even if the clearance of the pre-guide portion is reduced to reduce the difference from the clearance of the key guide portion, the key-side guide member can be easily engaged with the frame-side guide member at the pre-guide portion. Then, in this case, it is possible to reduce the adjustment amount in the lateral direction of the key at the time of the key guide part Te engage the key-side guide member to the frame side guide member, the key-side guide member at key guide portion The operation to engage the frame side guide member becomes easier.

Another feature of the present invention, the ends of the projections on the side from entering the grooves during assembly of the key frame of the key, the inclined surface cut away the left and right end portions (24g, 24h, 34g, 34h 45g, 45h, 24m, 24n, 34m, 34n, 45m, 45n), or the left and right inner side surfaces at the end of the groove on the side where the protrusion is inserted when the key is assembled to the key frame. This is because the notched inclined surfaces (14i, 14j, 14o, 14p) are provided.

In another aspect of the present invention, the inclined surface provided at the end of the protrusion or the end of the groove exhibits a sub-guide function before the protrusion enters the groove. Therefore, according to the other feature of the present invention, when the key is assembled to the key frame, even if the clearance of the key guide portion is extremely small, the operation of allowing the protruding portion to enter the groove becomes easier. . In particular, engagement of the lateral width of the inclined surface, if larger than the value obtained by subtracting the clearance of key guide portion from a clearance of pre-guide portion, the frame-side guide member the key-side guide member Te key guide portion It is not necessary to adjust the position of the key in the left-right direction for matching, and the operation of allowing the protruding portion to enter the groove becomes extremely simple.

It is a schematic perspective view of a keyboard apparatus including a key for one octave according to the first to third embodiments of the present invention. It is a top view of the keyboard apparatus of FIG. It is a front view of the keyboard apparatus of FIG. FIG. 3 is an enlarged end view of the keyboard device viewed along line AA in FIG. 2. It is an enlarged view of the B section of FIG. (A) is a top view of the 1st key unit of Drawing 1 thru / or Drawing 4, (B) is a front view of the 1st key unit, and (C) is a side view of the 1st key unit. (A) is a top view of the 2nd key unit of Drawing 1 thru / or Drawing 4, (B) is a front view of the 2nd key unit, and (C) is a side view of the 2nd key unit. (A) is a plan view of the third key unit of FIGS. 1 to 4, (B) is a front view of the third key unit, and (C) is a side view of the third key unit. (A) is a perspective view of a key side guide member and a frame side guide member according to the first embodiment, (B) is a plan view of the key side guide member and the frame side guide member, and (C) is a first view. It is a top view of the key side guide member and the frame side guide member in the process of assembling the first to third key units to the key frame. (A) is a top view of the key side guide member and frame side guide member which concern on the 1st modification of 1st Embodiment, (B) (C) assembles the 1st thru | or 3rd key unit to a key frame. It is a top view of the key side guide member and frame side guide member in a process. (A) is a top view of the key side guide member and frame side guide member which concern on the 2nd modification of 1st Embodiment, (B) (C) assembles the 1st thru | or 3rd key unit to a key frame. It is a top view of the key side guide member and frame side guide member in a process. (A) is a top view of the key side guide member and frame side guide member which concern on the 3rd modification of 1st Embodiment, (B) (C) assembles the 1st thru | or 3rd key unit to a key frame. It is a top view of the key side guide member and frame side guide member in a process. (A) is a top view of the key side guide member and frame side guide member which concern on 2nd Embodiment, (B) is the said key side guide member in the process of attaching the 1st thru | or 3rd key unit to a key frame, It is a top view of a frame side guide member. (A) is a top view of the key side guide member and frame side guide member which concern on the 1st modification of 2nd Embodiment, (B) is the said process in the process of attaching the 1st thru | or 3rd key unit to a key frame. It is a top view of a key side guide member and a frame side guide member. (A) is a top view of the key side guide member and frame side guide member which concern on the 2nd modification of 2nd Embodiment, (B) is the said process in the process of attaching the 1st thru | or 3rd key unit to a key frame. It is a top view of a key side guide member and a frame side guide member. It is a reverse view of the key side guide member which concerns on 3rd Embodiment. (A) is a perspective view of the frame side guide member which concerns on the 1st modification of 3rd Embodiment, (B) is a top view of the said frame side guide member. (A) is the perspective view which looked at the key side guide member which concerns on the 2nd modification of 3rd Embodiment from the downward direction, (B) is the bottom view of the said key side guide member.

a. First Embodiment Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic perspective view of a keyboard device including a key for one octave according to the first embodiment, FIG. 2 is a plan view of the keyboard device, and FIG. 3 is a front view of the keyboard device. 4 is an enlarged end view of the keyboard device taken along line AA in FIG. 2, and FIG. 5 is an enlarged view of a portion B in FIG. In this specification, the player side (the lower left side in FIG. 1 and the lower side in FIG. 2) is the front side of the keyboard device, and the side opposite to the performer (the upper right side in FIG. 1 and the upper side in FIG. 2) is the keyboard. Be behind the device. The left / right direction of the performer (from the upper left to the lower right in FIG. 1 and the left / right direction in FIG. 2) is defined as the left / right direction of the keyboard device.

  The keyboard device has a key frame 10 fixed in the keyboard instrument below the keyboard. The key frame 10 has a flat plate-like lower step wall 11 extending horizontally in the left and right and front and rear directions at the front, and a plate-like upright wall 12 erected upward at the rear end of the lower step wall 11; At the upper end of the upright wall 12, the upper wall 13 extends horizontally and has a predetermined width and is long and flat in the left-right direction. The lower step wall 11, the upright wall 12, and the upper step wall 13 are integrally formed of metal, resin, or the like. The upper step wall 13 is formed with a rectangular parallelepiped through-hole 13a extending in the left-right direction that communicates from the upper surface to the lower surface at substantially the center position in the left-right direction, with the front and rear inner surfaces thereof being parallel to the front and rear end surfaces of the upper step wall 13. Has been. On the upper wall 13, first to third key units 20, 30, and 40 that are integrally formed of resin are placed at the rear end portions. In addition, an upper surface formed with an internal thread on the inner peripheral surface in order to firmly fix the first to third key units 20, 30, and 40 by screwing fixing screws (not shown) at appropriate locations on the upper wall 13. A circular screw hole 13b that communicates with the lower surface is also provided. Instead of this, as the screw hole 13b, a simple cylindrical hole having no internal thread on the inner surface is used, and the first to third key units are used by a self-tap screw method in which a tap screw is screwed into the cylindrical hole. 20, 30, and 40 may be firmly fixed on the upper wall 13.

  On the lower step wall 11, frame side guide members 14 respectively corresponding to white keys 21 and 31 and a black key 41 described later are provided integrally with the lower step wall 11. As shown in FIG. 9, the frame side guide member 14 has a front surface 14 a, a rear surface 14 b, left and right side surfaces 14 c and 14 d, and an upper surface 14 e each having an overall shape of a rectangular parallelepiped shape. Projecting upward from the upper surface of the lower step wall 11 at a position facing each other. In FIG. 9A, in order to facilitate understanding of the shape of the frame side guide member 14, key side guide members 24, 34, and 45, which will be described later, are positioned at the position of the upper surface 14e of the frame side guide member 14. The upper part of the key side guide members 24, 34, and 45 is removed by cutting horizontally.

  The frame-side guide members 14 for the white keys 21 and 31 are arranged in a line in the left-right direction at a position slightly ahead of the center position in the front-rear direction of the white keys 21 and 31, and the frame-side guide members 14 for the black keys 41 are white. They are arranged in a line in the left-right direction at a position slightly behind the frame-side guide member 14 for the keys 21 and 31. The front surface 14a and the rear surface 14b extend in the left-right direction, and the left and right side surfaces 14c, 14d extend in the front-rear direction. The upper surface 14e is positioned below the upper ends of key side guide members 24, 34, and 45, which will be described later. The front surface 14a and the upper surface 14e are preferably extended in accordance with the rotation trajectories of the white keys 21, 31 and the black key 41. In the present embodiment, the frame side guide member 14 for the black key 41 is positioned behind the frame side guide member 14 for the white keys 21 and 31, but the frame side guide member 14 for the black key 41 and the white side guide member 14 are white. The frame side guide member 14 for the keys 21 and 31 is disposed at the same position in the front-rear direction, and the frame side guide member 14 for the black key 41 is positioned in front of the frame side guide member 14 for the white keys 21 and 31. You may let them.

  On the front surface 14a side of the frame side guide member 14, a groove 14f extending in the vertical direction is provided at the center position in the left and right direction. The groove 14f has a rectangular shape that is long in the front-rear direction and has a predetermined cross-sectional shape in the left-right direction and a predetermined depth in the rear.

  Next, the 1st key unit 20 is demonstrated using the top view of FIG. 6 (A), the front view of FIG. 6 (B), and the side view of FIG. 6 (C). The first key unit 20 has four white keys 21 that are not adjacent to each other corresponding to the pitch names C, E, G, and B, respectively. The white key 21 is composed of an upper wall, a front wall, a side wall, and a rear wall, and forms a rectangular space with the inside opened downward. However, the broken line which shows the inner surface by the plate | board thickness of an upper wall, a front wall, a side wall, and a rear wall is abbreviate | omitted in drawings other than FIG. Steps are provided on the upper wall and the side wall to secure the space for the black key 41.

  The rear walls of these four white keys 21 are connected to the connecting portion 23 via hinges 22 respectively. The hinge 22 and the connecting portion 23 are integrally formed with the white key 21. The hinge 22 has a lateral width equal to or substantially equal to the lateral width of the rear end portion of the white key 21 and is formed in a thin, square and flat plate shape so as to be easily elastically deformed in the vertical direction. It is connected to the lower part of the rear wall and extends backward. The hinge 22 is elastically deformed when the white key 21 is pressed to allow downward displacement of the front end portion of the white key 21, and when the white key 21 is released, the front end portion of the white key 21 is moved upward by elastic force. And the white key 21 is returned to the key release position.

  The connecting portion 23 is a member that has a rectangular longitudinal cross section and is elongated in the horizontal direction, and connects the rear end of the hinge 22 at the middle portion of the front surface in the vertical direction. The connecting portion 23 is configured to be relatively thick so as not to be deformed, and the thickness in the vertical direction is larger than the thickness in the vertical direction of the hinge 22. The front-rear width of the connecting portion 23 is equal to the front-rear width of the upper wall 13 of the key frame 10, and the connecting portion 23 is placed on the upper wall 13. The connecting portion 23 is formed with a rectangular parallelepiped through-hole 23a that extends from the upper surface to the lower surface at a substantially central position in the left-right direction, with the front and back inner surfaces parallel to the front and rear end surfaces of the connecting portion 23. (See FIGS. 4 and 5). In addition, a circular through hole 23b that communicates from the upper surface to the lower surface for allowing the fixing screw to pass therethrough is also provided at a location corresponding to the screw hole 13b of the connecting portion 23.

  A key-side guide member 24 is provided integrally with the white key 21 at a position on the lower surface of the white key 21 that faces the frame-side guide member 14. As shown in FIG. 9 (the upper side of the upper surface 14e of the frame side guide member 14 is removed in FIG. 9 (A)), the key side guide member 24 has a U-shaped cross section and a front wall 24a and left and right side walls 24b, 24c and protrudes downward from the lower surface of the white key 21. The lower surface of the key side guide member 24 is located above the upper surface of the lower wall 11 of the key frame 10. The front wall 24a and the left and right side walls 24b, 24c are configured in a flat plate shape, the front wall 24a extends in the left-right direction, and the left and right side walls 24b, 24c extend in the front-rear direction. The rear surface of the front wall 24a is provided with a flat plate-like protruding portion 24d that protrudes rearward and extends in the vertical direction at the center position in the left-right direction. The lateral width of the projecting portion 24d is smaller than the lateral width of the groove 14f of the frame side guide member 14, the rear end of the projecting portion 24d is located in front of the rear ends of the left and right side walls 24b, 24c, and the bottom surface of the groove 14f. It is set so as to be located slightly forward. Note that the left and right positions of the projecting portion 24d of the key side guide member 24 and the groove 14f of the frame side guide member 14 are the left and right directions of the key side guide member 24 and the frame side guide member 14 as long as they are opposite to each other. It may be a position slightly shifted to the left or right from the center position.

  In a state where the first key unit 20 is assembled to the key frame 10 without error, a gap of the same distance is provided between both outer side surfaces of the protruding portion 24d and both inner side surfaces of the groove 14f. Let the distance in the left-right direction of the gap be a. In the following description, this distance a is referred to as key guide clearance a. Further, a gap of the same distance is provided between the inner side surface of the left side wall 24b and the left side surface 14c of the frame side guide member 14, and between the inner side surface of the right side wall 24c and the right side surface 14d of the frame side guide member 14. The distance in the left-right direction of the gap is b. In the following description, this distance b is referred to as pre-guide clearance b. There is a relationship of a <b between the key guide clearance a and the pre-guide clearance b. Further, the protruding length of the protruding portion 24d from the rear surface of the front wall 24a to the rear is set to be smaller than the protruding length of the left and right side walls 24b and 24c from the rear surface of the front wall 24a to the rear. Specifically, as shown in FIG. 9C, the key side guide member 24 is moved from the front to the rear, and the left and right side surfaces 14c, 14c, 14c of the frame side guide member 14 are placed in both inner side surfaces of the left and right side walls 24b, 24c. When 14d is accommodated, after the rear end portions of the inner side surfaces of the left and right side walls 24b and 24c and the front end portions of the left and right side surfaces 14c and 14d of the frame side guide member 14 begin to overlap in the front-rear direction, the protruding portion 24d 14f starts to enter.

  Next, the 2nd key unit 30 is demonstrated using the top view of FIG. 7 (A), the front view of FIG. 7 (B), and the side view of FIG. 7 (C). The second key unit 20 has three white keys 31 that are not adjacent to each other corresponding to the pitch names D, F, and A, respectively. The white key 31 is also composed of an upper wall, a front wall, left and right side walls, and a rear wall, and forms a rectangular space with the inside opened downward. The length and height of the white key 31 in the front-rear direction are the same as in the case of the white key 21. However, the step portion is different from the case of the white key 21 in order to secure the space for the black key 41 provided on the upper wall and the left and right side walls.

  The rear walls of these three white keys 31 are connected to the connecting portion 33 via hinges 32, respectively. The hinge 32 and the connecting portion 33 are also configured in the same manner as the hinge 22 and the connecting portion 23 of the white key 21, and are integrally formed with the white key 31. The front end of the hinge 32 is connected to the upper part of the rear wall of the white key 31. The connecting portion 33 is placed on the connecting portion 23 of the first key unit 20 by connecting the rear end of the hinge 32 at the lower end portion of the front surface in the vertical direction. The connecting portion 33 is formed with a rectangular parallelepiped through-hole 33a that extends from the upper surface to the lower surface in the left-right direction so that the front and rear inner surfaces thereof are parallel to the front and rear end surfaces of the connecting portion 33 (FIGS. 4 and 5). See). Further, a through hole 33 b similar to the through hole 23 b of the first key unit 20 is formed in the connecting portion 33.

  Further, on the lower surface of the white key 31, a key side guide member 34 similar to the key side guide member 24 of the first key unit 20 is integrated with the white key 31 at the same position in the front-rear direction as the key side guide member 24. Is provided. The key side guide member 34 also has a front wall 34a, left and right side walls 34b, 34c, and a protruding portion 34d similar to the front wall 24a, the left and right side walls 24b, 24c, and the protruding portion 24d of the key side guide member 24.

  Next, the 3rd key unit 40 is demonstrated using the top view of FIG. 8 (A), the front view of FIG. 8 (B), and the side view of FIG. 8 (C). The third key unit 20 has five black keys 41 that are not adjacent to each other corresponding to the pitch names C #, D #, F #, G #, and A #. The black key 41 is also composed of an upper wall, a front wall, left and right side walls, and a rear wall, and forms a rectangular space with the inside opened downward. However, the length in the front-rear direction of the black key 41 is shorter than the length in the front-rear direction of the white keys 21, 31, and the height of the black key 41 is higher than the height of the white keys 21, 31. Further, the front wall of the black key 41 is inclined so as to be positioned forward and downward.

  The rear walls of these five black keys 41 are connected to the connecting portions 43 via hinges 42, respectively. The hinge 42 and the connecting portion 43 are also configured in the same manner as the hinges 22 and 32 and the connecting portions 23 and 33 of the white keys 21 and 31, and are integrally formed with the black key 41. The front end of the hinge 42 is connected to the upper part of the rear wall of the black key 41. The connecting portion 43 is placed on the connecting portion 33 of the second key unit 30 by connecting the rear end of the hinge 42 at the lower end portion of the front surface in the vertical direction. The connecting portion 43 is formed with a rectangular parallelepiped through-hole 43a that communicates from the upper surface to the lower surface in the left-right direction with the front and back inner surfaces parallel to the front and rear end surfaces of the connecting portion 43 (FIGS. 4 and 5). See). In addition, a through hole 43 b similar to the through hole 33 b of the second key unit 20 is formed in the connecting portion 43.

  The lower surface of the connecting portion 43 is provided with a hook portion 44 that protrudes downward from the outer side behind the through hole 43a that is located approximately at the center in the left-right direction of the connecting portion 43 and that is spaced forward from the rear end surface of the connecting portion 43. ing. The hook portion 44 penetrates the through-hole 33a of the second key unit 30, the through-hole 23a of the first key unit 20 and the through-hole 13a of the key frame 10 from the upper side to the lower side, so that the first to third key units 20, The members 30 and 40 are assembled to the key frame 10. The hook portion 44 has a rectangular shape that is long in the left-right direction, has a narrower width on both the left and right sides, and has a trapezoidal shape when viewed from the front. The hook portion 44 is thin in the front-rear direction, and the hook portion 44 is configured to be elastically deformed in the front-rear direction, so that the lower end can be displaced in the front-rear direction.

  At the lower end of the front surface of the hook portion 44, there is provided a locking claw 44a that protrudes forward and has a triangular cross section. The locking claw 44a has the hook portion 44 penetrated from the upper side to the lower side through the through hole 33a of the second key unit 30, the through hole 23a of the first key unit 20, and the through hole 13a of the key frame 10. The upper surface of the key frame 10 is engaged with the lower surface of the upper wall 13 of the key frame 10, and the first to third key units 20, 30, and 40 are assembled to the key frame 10. Further, a through hole 43 b similar to the through hole 33 b of the second key unit 30 is formed in the connecting portion 43.

  Further, on the lower surface of the black key 41, a key side guide member 45 similar to the key side guide members 24 and 34 of the first and second key units 20 and 30 is located at a rear position with respect to the key side guide members 24 and 34. The black key 41 is integrally provided so as to face the frame side guide member 14. The key side guide member 45 also has front walls 45a, left and right side walls 45b, 45c similar to the front walls 24a, 34a, left and right side walls 24b, 24c, 34b, 34c and the projecting portions 24d, 34d of the key side guide members 24, 34. Part 45d. The left and right side surfaces 14b and 14c of the frame side guide member 14 and the inner side surfaces of the left and right side walls 24b, 24c, 34b, 34c, 45b and 45c of the key side guide members 24, 34 and 45 are used as pre-guide portions of the present invention. Configure. Further, the left and right side surfaces of the protrusions 24d, 34d, and 45d of the key side guide members 24, 34, and 45 and the left and right inner surfaces of the groove 14f of the frame side guide member 14 constitute a key guide portion of the present invention.

  The assembly of the first to third key units 20, 30, 40 configured in this way into the key frame 10 will be described. In this assembly, the first key unit 20 is first brought close to the key frame 10 in a state where the first key unit 20 is inclined so that the rear end thereof is higher than the front end with respect to the key frame 10 in the horizontal state. Thereafter, while the first key unit 20 (white key 21) is tilted, the first key unit 20 (white key 21) moves rearward while adjusting the horizontal position of the first key unit 20 (white key 21). 24 is caused to approach the frame side guide member 14 from the front, and the left and right side surfaces 14c and 14d of the frame side guide member 14 are inserted into the left and right side walls 24b and 24c of the key side guide member 14. In other words, first, the inner side surfaces of the left and right side walls 24b and 24c, which are pre-guide portions, and the left and right side surfaces 14c and 14d of the frame side guide member 14 are engaged.

  The first key unit 20 is further moved rearward while maintaining the state in which the left and right side surfaces 14c and 14d are inserted into the left and right side walls 24b and 24c of the key side guide member 14 (that is, the pre-guide portion is engaged). Moving. Then, before the protrusion 24d of the key side guide member 24 is inserted into the groove 14f of the frame side guide member 14, the first key unit 20 is finely adjusted in the left-right direction to further move the first key unit 20 to the rear. To project the protrusion 24d into the groove 14f (see FIG. 9C). In other words, the left and right side surfaces of the protruding portion 24d, which is a key guide portion, are engaged with the left and right inner surfaces of the groove 14f. Thereafter, the rear end portion of the first key unit 20, that is, the connecting portion 23 is moved downward, and the connecting portion 23 is placed on the upper surface of the upper wall 13 of the key frame 10 to keep the first key unit 20 substantially horizontal. To do.

  Next, as with the first key unit 20, the second key unit 30 is moved rearward while adjusting the position in the left-right direction with the rear end thereof being tilted so as to be higher than the front end. After the left and right side surfaces 14c and 14d of the guide member 14 have entered the left and right side walls 34b and 34c of the key side guide member 34, the projecting portion 34d enters the groove 14f. Then, the rear end portion of the second key unit 30, that is, the connecting portion 23 is moved downward, the connecting portion 33 is placed on the upper surface of the connecting portion 23 of the first key unit 20, and the second key unit 30 is substantially horizontal. To maintain.

  Next, as with the first and second key units 20 and 30, the third key unit 40 is moved backward while adjusting the position in the left-right direction with the rear end tilted so as to be higher than the front end. Then, after the left and right side surfaces 14c and 14d of the frame side guide member 14 are intruded into the left and right side walls 45b and 45c of the key side guide member 44, the protruding portion 45d is intruded into the groove 14f. Thereafter, the rear end of the third key unit 40 is moved downward, and the hook portion 44 is provided in the through hole 33 a provided in the connecting portion 33 of the second key unit 30 and the connecting portion 23 of the first key unit 20. It penetrates into the through hole 23a and the through hole 13a provided in the upper stage wall 13 of the key frame 10 in this order, and the upper surface of the locking claw 44a provided at the lower end of the hook portion 44 is engaged with the lower surface of the upper stage wall 13. The first to third key units 20, 30 and 40 are assembled to the key frame 10. In this state, the first to third key units 20, 30, 40 are kept horizontal.

  Further, the following method may be employed for assembling the first to third key units 20, 30, 40 to the key frame 10. The connecting portion 33 of the second key unit 30 is placed on the upper surface of the connecting portion 23 of the first key unit 20. Next, the hook portion 44 of the third key unit 40 enters the through hole 33a provided in the connecting portion 33 of the second key unit 30 and the through hole 23a provided in the connecting portion 23 of the first key unit 20 in this order. Then, the connecting portion 43 of the third key unit 40 is placed on the upper surface of the connecting portion 33 of the second key unit 30. Thereby, the 1st thru | or 3rd key units 20, 30, and 40 will be in the state assembled by making the hook part 44 penetrate the through-holes 33a and 23a, and overlapping the connection parts 23, 33, and 43 in one set. .

  The first to third key units 20, 30, 40 in the assembled state in this way are adjusted in the left-right direction with their rear ends tilted so that they are higher than the front ends. However, the left and right side surfaces 14c and 14d of the frame side guide member 14 are inserted into the left and right side walls 23b, 23c, 34b, 34c, 45b and 45c of the key side guide members 24, 34 and 45, and then protruded. The portions 24d, 34d, and 45d are caused to enter the groove 14f. In other words, after engaging the inner side surfaces of the left and right side walls 24b, 24c, 34b, 34c, 45b, and 45c that are the pre-guide portions with the left and right side surfaces 14c and 14d of the frame side guide member 14, the protrusions that are the key guide portions. The left and right side surfaces of the portions 24d, 34d, and 45d are engaged with the left and right inner surfaces of the groove 14f. Thereafter, the rear ends of the first to third key units 20, 30, 40 are moved downward to cause the hook portion 44 to enter the through hole 13 a provided in the upper stage wall 13 of the key frame 10, and the hook portion 44. The upper surface of the locking claw 44 a provided at the lower end of the upper wall 13 is locked to the lower surface of the upper wall 13, and the first to third key units 20, 30, 40 are assembled to the key frame 10. Also by this, the 1st thru | or 3rd key unit 20,30,40 is assembled | attached on the upper stage wall 13 of the key frame 10 in the state maintained horizontally.

  In assembling the first to third key units 20, 30, 40 to the key frame 10, the pre-guide clearance b is larger than the key guide clearance a, and the pre-guide clearance b can be increased to some extent. The left and right side surfaces 14c, 14d of the side guide member 14 can be easily inserted into the left and right side walls 24b, 24c, 34b, 34c, 45b, 45c of the key side guide members 24, 34, 45. That is, the inner side surfaces of the left and right side walls 24b, 24c, 34b, 34c, 45b, and 45c of the key side guide members 24, 34, and 45, which are pre-guide portions, and the left and right side surfaces 14c and 14d of the frame side guide member 14 are easily obtained. Can be engaged.

  Before the protrusions 24d, 34d, and 45d enter the groove 14f, the left and right side positions of the key side guide members 24, 34, and 45 are the left and right side walls 24b, 24c, 34b, and 34c, which are pre-guide portions. , 45b, 45c and the left and right side surfaces 14c, 14d of the frame side guide member 14. Therefore, the adjustment amount of the position in the left-right direction of the first to third key units 20, 30, 40 for allowing the protrusions 24d, 34d, 45d to enter the groove 14f can be reduced, and the protrusions 24d, 34d, 45d It is possible to easily enter the groove 14f. That is, the left and right side surfaces of the projecting portions 24d, 34d, and 45d, which are key guide portions, can be easily engaged with the left and right inner side surfaces of the groove 14f. As a result, according to the first embodiment, the first to third key units 20, 30, 40 can be operated even if the key guide clearance a is reduced in order to prevent the lateral movement of the key during the key release operation. The operation of assembling the key frame 10 is simplified. And the deformation | transformation of the member which comprises a key guide part is also prevented by this ease of assembly | attachment.

  After the first to third key units 20, 30, and 40 are assembled to the key frame 10 in this way, the fixing screws (not shown) are connected to the third key unit 40, the second key unit 30, and the first key unit 20. The through holes 43b, 33b, and 23b provided in the connecting portions 43, 33, and 23 are penetrated from above in this order and screwed into the screw holes 13b provided in the upper wall 13 of the key frame 10. As a result, the first to third key units 20, 30, and 40 are firmly fixed to the key frame 10 to complete the keyboard device.

  In the keyboard device thus completed, when the performer presses the white keys 21, 31 and the black key 41, the white keys 21, 31 and the black key 41 are elastically deformed by the hinges 22, 32, 42. The front ends are displaced downward around the rear end. At this time, the protrusions 24d, 34d, and 45d of the key-side guide members 24, 34, and 45 are displaced downward along the grooves 14f of the frame-side guide member 14. That is, the white keys 21, 31 and the black key 41 are key-guided by the groove 14f of the frame-side guide member 14 which is a key guide portion, and their front ends are displaced downward. Accordingly, the lateral displacement of the key-side guide members 24, 34, 45, that is, the keys 21, 31, 41 is restricted, and the white keys 21, 31 and the black key 41 are displaced substantially vertically downward without being shaken. When the pressed white keys 21, 31 and the black key 41 are released, the white keys 21, 31 and the black key 41 are restored to the restoring force of the hinges 22, 32, 42 or other members (contact rubber not shown). The return force of the spring member (or the like) displaces the front ends upward to return to the original position. Also in this case, the white keys 21, 31 and the black key 41 are key-guided as in the case of the key depression. In particular, as described above, since the key guide clearance a can be reduced, the lateral shake of the white keys 21 and 31 and the black key 41 can be satisfactorily suppressed.

a1. First Modification Next, a first modification of the first embodiment will be described with reference to FIG. FIG. 10A is a plan view of the key side guide members 24, 34, 45 and the frame side guide member 14 according to a first modification corresponding to FIG. 9B of the first embodiment. 10B and 10C are plan views of the key-side guide members 24, 34, and 45 and the frame-side guide member 14 in the process of assembling the first to third key units 10, 20, and 30 to the key frame 10. is there. This first modification is a modification of only the frame-side guide member 14 of the first embodiment, and the other parts are the same as those of the first embodiment, so the same reference numerals as those of the first embodiment are used. Only matters relating to the used and deformed parts will be described, and explanations relating to other parts will be omitted.

  In this first modified example, the corners of the front surface 14a and the left and right side surfaces 14c, 14d of the frame side guide member 14 are notched, and inclined surfaces (chamfers) 14g, 14h that spread outwardly from the front surface 14a toward the rear are the frames. The side guide member 14 is provided. The inclined surfaces 14g and 14h are flat surfaces and extend from the upper surface 14e of the frame side guide member 14 to the lower end. Note that the lateral widths of the inclined surfaces 14g and 14h are larger than the key guide clearance a and the pre-guide clearance b.

  The inclined surfaces 14g and 14h allow the left and right side surfaces 14c and 14d of the frame side guide member 14 to enter the inner side surfaces of the left and right side walls 24b, 24c, 34b, 34c, 45b and 45c of the key side guide members 24, 34 and 45, respectively. The pre-guide unit functions as a sub-guide for causing the first to third key units 20, 30, 40 to perform the pre-guide function for the key frame 10. Specifically, as shown in FIG. 10B, before the left and right side surfaces 14c and 14d of the frame-side guide member 14 enter the inside of the left and right side walls 24b, 24c, 34b, 34c, 45b and 45c, the right side wall 24c. , 34c, 45c, the first to third keys so that the rear ends of the inner side surfaces (or the inner side surfaces of the left side walls 24b, 34b, 45b) fall within the horizontal width of the inclined surface 14h (or inclined surface 14g). What is necessary is just to adjust the left-right direction position of the unit 20,30,40. In this state, if the first to third key units 20, 30, 40 are moved backward, the inner side surfaces of the right side walls 24c, 34c, 45c (or the inner side surfaces of the left side walls 24b, 34b, 45b) will be described. The rear end moves obliquely rearward along the inclined surface 14h (or inclined surface 14g), and the inner side surface of the right side walls 24c, 34c, 45c (or the inner side surface of the left side walls 24b, 34b, 45b) is a frame side guide member. 14 starts to engage with the right side surface 14d (or the left side surface 14c).

  Then, if the first to third key units 20, 30, 40 are further moved backward, as shown in FIG. 10 (C), the protruding portions 24d, 34d, 45d are shown in FIG. 9 (C). As in the case of the first embodiment, the position in the left-right direction is substantially the same as the position in the left-right direction of the groove 14f and is positioned in front of the groove 14f. As in the case of the first embodiment, the horizontal positions of the first to third key units 20, 30, 40 are finely adjusted, and the first to third key units 20, 30, 40 are moved backward. The protrusions 24d, 34d, and 45d are moved into the groove 14f by moving.

  In the first modified example as described above, when the left and right side surfaces 14c and 14d of the frame side guide member 14 are caused to enter the inside of the left and right side walls 24b, 24c, 34b, 34c, 45b and 45c, the right side walls 24c, 34c, The rear end of the inner surface of 45c (or the inner surfaces of the left side walls 24b, 34b, 45b) may be accommodated within the width in the left-right direction of the inclined surface 14h (or inclined surface 14g). Therefore, according to the first modification, the left and right side surfaces 14c and 14d of the frame-side guide member 14 are easily inserted into the left and right side walls 24b, 24c, 34b, 34c, 45b, and 45c, so that the function of the pre-guide portion is achieved. Can be demonstrated.

  In this first modification, the pre-guide clearance b is larger than the key guide clearance a. However, even if the difference between them is reduced, the left and right side surfaces 14c and 14d of the frame side guide member 14 are connected to the left and right side walls 24b and 24c. , 34b, 34c, 45b, 45c can be easily penetrated. In this case, the left and right position adjustment amounts of the first to third key units 20, 30 and 40 for allowing the left and right side surfaces of the protrusions 24d, 34d and 45d to enter the inside of the groove 14f can be further reduced. Compared with the first embodiment, the projecting portions 24d, 34d, and 45d can be easily inserted into the groove 14f.

a2. Second Modification Next, a second modification of the first embodiment will be described with reference to FIG. FIG. 11A is a plan view of the key side guide members 24, 34, 45 and the frame side guide member 14 according to a second modification corresponding to FIG. 9B of the first embodiment. 11B and 11C are plan views of the key-side guide members 24, 34, and 45 and the frame-side guide member 14 in the process of assembling the first to third key units 10, 20, and 30 to the key frame 10. is there. In the second modification, only the key-side guide members 24, 34, and 45 of the first embodiment are deformed, and other parts are the same as those of the first embodiment. The same reference numerals are used, only the matters relating to the deformed part are described, and the explanation relating to the other parts is omitted.

  In the second modified example, the corners on the inner surface side of the rear end portions of the left side walls 24b, 34b, 45b are notched, and inclined surfaces (chamfers) 24e, 34e, 45e that spread outward as they move rearward are the keys. Provided on the side guide members 24, 34, 45. In addition, the corners on the inner surface side of the rear end portions of the right side walls 24c, 34c, 45c are also cut out, and the inclined surfaces (chamfers) 24f, 34f, 45f spreading outward as they go rearward are also provided on the key side guide members 24, 34. , 45. The inclined surfaces 24e, 34e, 45e, 24f, 34f, 45f are flat surfaces and extend from the lower end to the upper end of the key side guide members 24, 34, 45. Note that the lateral widths of the inclined surfaces 24e, 34e, 45e, 24f, 34f, and 45f are larger than the key guide clearance a and the pre-guide clearance b.

  The inclined surfaces 24e, 24f, 34e, 34f, 45e, and 45f are formed on the left and right side surfaces 14c and 14d of the frame side guide member 14 and the left and right side walls 24b, 24c, 34b, 34c, 45b, and 45c of the key side guide members 24, 34, 45, respectively. It functions as a sub-guide for allowing the pre-guide portion to exert the pre-guide function for the key frame 10 of the first to third key units 20, 30 and 40. Specifically, as shown in FIG. 11B, before the left and right side surfaces 14c and 14d of the frame-side guide member 14 enter the inside of the left and right side walls 24b, 24c, 34b, 34c, 45b and 45c, the right side surface 14d. (Or the left side surface 14c) of the first to third key units 20, 30, 40 so that the front end thereof falls within the lateral width of the inclined surfaces 24f, 34f, 45f (or the inclined surfaces 24e, 34e, 45e). What is necessary is just to adjust the position of the left-right direction. In this state, if the first to third key units 20, 30, 40 are moved rearward, the front end of the right side surface 14d (or the left side surface 14c) becomes the inclined surfaces 24f, 34f, 45f (or the inclined surface 24e). , 34e, 45e), the key side guide members 24, 34, 45 are moved obliquely rearward to the inner side surfaces of the right side walls 24c, 34c, 45c (or the inner side of the left side walls 24b, 34b, 45b). The side surface starts to engage with the right side surface 14d (or the left side surface 14c) of the frame side guide member 14.

  Then, if the first to third key units 20, 30, 40 are moved further rearward, as shown in FIG. 11C, the protrusions 24d, 34d, 45d are shown in FIG. 9C. As in the case of the first embodiment, the position in the left-right direction is substantially the same as the position in the left-right direction of the groove 14f and is positioned in front of the groove 14f. As in the case of the first embodiment, the horizontal positions of the first to third key units 20, 30, 40 are finely adjusted, and the first to third key units 20, 30, 40 are moved backward. The protrusions 24d, 34d, and 45d are moved into the groove 14f by moving.

  In the second modification as described above, when the left and right side surfaces 14c and 14d of the frame side guide member 14 are caused to enter the inside of the left and right side walls 24b, 24c, 34b, 34c, 45b and 45c, the right side surface 14d (or the left side) The front end of the surface 14c) may be accommodated within the lateral width of the inclined surfaces 24f, 34f, 45f (or inclined surfaces 24e, 34e, 45e). Therefore, according to the second modification, the left and right side surfaces 14c and 14d of the frame-side guide member 14 are simply inserted into the left and right side walls 24b, 24c, 34b, 34c, 45b, and 45c, and the function of the pre-guide portion Can be demonstrated.

  Also in this second modified example, the pre-guide clearance b is larger than the key guide clearance a. However, even if the difference between them is reduced, the left and right side surfaces 14c and 14d of the frame side guide member 14 are connected to the left and right side walls 24b and 24c. , 34b, 34c, 45b, 45c can be easily penetrated. In this case, the left and right position adjustment amounts of the first to third key units 20, 30 and 40 for allowing the left and right side surfaces of the protrusions 24d, 34d and 45d to enter the groove 14f can be further reduced. Compared with the first embodiment, the projecting portions 24d, 34d, and 45d can be easily inserted into the groove 14f.

a3. Third Modification Next, a third modification of the first embodiment will be described with reference to FIG. FIG. 12A is a plan view of the key side guide members 24, 34, 45 and the frame side guide member 14 according to a third modification corresponding to FIG. 9B of the first embodiment. 12B and 12C are plan views of the key side guide members 24, 34, 45 and the frame side guide member 14 in the process of assembling the first to third key units 10, 20, 30 to the key frame 10. is there. The third modified example is a combination of the first modified example and the second modified example, and the frame-side guide member 14 is provided with inclined surfaces 14g and 14h similar to the first modified example, The left side walls 24b, 34b, 45b are provided with inclined surfaces 24e, 24f, 34e, 34f, 45e, 45f similar to those of the second modified example. Other parts are the same as those in the first embodiment, the first modified example, and the second modified example. Therefore, the same reference numerals as those in the first embodiment, the first modified example, and the second modified example are used, and the description thereof is omitted. Is omitted.

  In the third modified example, as shown in FIG. 12B, before the left and right side surfaces 14c and 14d of the frame side guide member 14 enter the inside of the left and right side walls 24b, 24c, 34b, 34c, 45b and 45c. First to third so that a part of the inclined surfaces 24f, 34f, 45f (or inclined surfaces 24e, 34e, 45e) and a part of the inclined surface 14h (or inclined surface 14g) face each other in the front-rear direction. What is necessary is just to adjust the left-right direction position of the key units 20, 30, and 40. FIG. If the first to third key units 20, 30, 40 are moved rearward in this state, the left and right side walls 24b, 24c, 34b, 34c, 45b, 45c are inclined surfaces 24f, 34f, 45f (or The inclined surfaces 24e, 34e, 45e) and the inclined surface 14h (or the inclined surface 14g) are moved in an obliquely rearward state to contact the inner side surface (or the left side walls 24b, 34b) of the right side walls 24c, 34c, 45c. , 45b) starts to engage with the right side surface 14d (or the left side surface 14c) of the frame side guide member 14.

  Then, if the first to third key units 20, 30, 40 are further moved backward, as shown in FIG. 12 (C), the protruding portions 24d, 34d, 45d are formed as shown in FIG. 9 (C), FIG. Similarly to the first embodiment, the first modified example, and the second modified example shown in FIG. 10C and FIG. 11C, the horizontal position of the groove 14f is substantially matched with the horizontal position of the groove 14f. It will be located in the front. Then, as in the case of the first embodiment, the first modified example, and the second modified example, the horizontal positions of the first to third key units 20, 30, 40 are finely adjusted, and the first to third The key units 20, 30, and 40 are moved rearward so that the projecting portions 24d, 34d, and 45d enter the groove 14f.

  In the third modification as described above, when the left and right side surfaces 14c and 14d of the frame side guide member 14 are made to enter the inside of the left and right side walls 24b, 24c, 34b, 34c, 45b and 45c, the inclined surfaces 24f, 34f, A part of 45f (or inclined surfaces 24e, 34e, 45e) may be opposed to a part of inclined surface 14h (or inclined surface 14g) in the front-rear direction. Therefore, according to the third modification, the left and right side surfaces 14c and 14d of the frame-side guide member 14 are more easily connected to the left and right side walls 24b, 24c, 34b, 34c, and 45b, more simply than the first and second modifications. , 45c can be made to enter inside, and the function of a pre-guide part can be exhibited. Further, in the third modified example, similarly to the first modified example and the second modified example, the protrusions 24d, 34d, and 45d can be easily inserted into the groove 14f as compared with the first embodiment. Can be made.

b. Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 13A is a plan view of the key side guide members 24, 34, 45 and the frame side guide member 14 according to the second embodiment corresponding to FIG. 9B of the first embodiment. FIG. 13B is a plan view of the key side guide members 24, 34, 45 and the frame side guide member 14 in the process of assembling the first to third key units 10, 20, 30 to the key frame 10. 9 (C). In the second embodiment, only the frame-side guide member 14 of the first embodiment is deformed, and the other parts are the same as those of the first embodiment. Therefore, the same reference numerals as those of the first embodiment are used. Only matters relating to the used and deformed parts will be described, and explanations relating to other parts will be omitted.

  In the second embodiment, the corners between the front surface 14a of the frame side guide member 14 and the left and right inner surfaces of the groove 14f are notched, and the inclination spreads outward from the middle position of the left and right inner surfaces of the groove 14f toward the front surface 14a. Surfaces (chamfering) 14 i and 14 j are provided on the frame side guide member 14. The inclined surfaces 14i and 14j are flat surfaces and extend from the upper surface to the lower end of the frame side guide member 14. Note that the widths of the inclined surfaces 14i, 14j in the left-right direction are larger than the key guide clearance a. The inclined surfaces 14g and 14h function as sub guides for allowing the protruding portions 24d, 34d, and 45d to enter the groove 14f.

  Also in this case, when the first to third key units 20, 30, 40 are assembled to the key frame 10 without error, the left and right outer sides of the projecting portions 24d, 34d, 45d from the left and right outer ends of the inclined surfaces 14i, 14j. Both distances to the side are equal. When this distance is c, there is a relationship of c> b between the pre-guide clearance b and the distance c. The pre-guide clearance b is set larger than that in the first embodiment.

  Also in the second embodiment configured as described above, when the first to third key units 20, 30, and 40 are assembled to the key frame 10, first, as in the case of the first embodiment, The left and right outer surfaces of the frame side guide member 14 are inserted into the inner side surfaces of the left and right side walls 24b, 24c, 34b, 34c, 45b, and 45c of the key side guide members 24, 34, and 45 so The pre-guide function between the side surfaces and the inner side surfaces of the left and right side walls 24b, 24c, 34b, 34c, 45b, 45c of the key side guide members 24, 34, 45 is exhibited. In this state, since there is a relationship of c> b between the distance c and the pre-guide clearance b, as shown in FIG. 13B, the left and right ends of the front end surfaces of the projecting portions 24d, 34d, and 45d Is located between the left end of the inclined surface 14i and the right end of the inclined surface 14j.

  Next, the first to third key units 20, 30, 40 are moved rearward in order to allow the protrusions 24d, 34d, 45d to enter the groove 14f. In this case, if the front end surfaces of the protrusions 24d, 34d, and 45d are within the lateral width of the groove 14f, the protrusions 24d, 34d, and 45d enter the groove 14f as they are. Even if the front end surfaces of the protrusions 24d, 34d, and 45d are not within the lateral width of the groove 14f, the left front end (or right front end) of the protrusions 24d, 34d, and 45d is the inclined surface 14i (or the inclined surface 14j). Are opposed to each other in the front-rear direction. Accordingly, in this case, the left front end (or right front end) of the protrusions 24d, 34d, and 45d is inclined surface 14i (or inclined surface 14j) due to the backward movement of the first to third key units 20, 30, and 40. ) And the left front end (or right front end) of the protrusions 24d, 34d, and 45d starts to engage with the left inner surface (or right inner surface) of the groove 14f. And if the 1st thru | or 3rd key unit 20,30,40 is moved further back, protrusion part 24d, 34d, 45d will penetrate | invade in the groove | channel 14f.

  In the second embodiment as described above, before the protrusions 24d, 34d, 45d enter the groove 14f, the left and right ends of the front end surfaces of the protrusions 24d, 34d, 45d are the left end of the inclined surface 14i and the inclined surface. Since it is located between the right end of 14j, the protrusions 24d, 34d, and 45d can be easily inserted into the groove 14f. Further, since the distance c is larger than the pre-guide clearance b and the relationship between the distance c and the pre-guide clearance b only needs to be c> b, the pre-guide clearance b should be made considerably larger than the key guide clearance a. Compared to the case of the first embodiment, the left and right outer surfaces of the frame side guide member 14 are arranged on the inner side surfaces of the left and right side walls 24b, 24c, 34b, 34c, 45b, 45c of the key side guide members 24, 34, 45. It becomes possible to enter more easily.

  Further, the protrusions 24d, 34d, and 45d can be easily inserted into the groove 14f without fine adjustment of the first to third key units 20, 30, and 40 in the left-right direction. Therefore, the key guide clearance a can be made extremely small, and the lateral shaking of the white keys 21 and 31 and the black key 41 when pressing and releasing keys can be minimized.

b1. First Modification Next, a first modification of the second embodiment will be described with reference to FIG. FIG. 14A is a plan view of the key side guide members 24, 34, and 45 and the frame side guide member 14 according to a first modification corresponding to FIG. 13A of the second embodiment. FIG. 14B is a plan view of the key side guide members 24, 34, 45 and the frame side guide member 14 in the process of assembling the first to third key units 10, 20, 30 to the key frame 10. 13 (B). In this first modification, instead of the inclined surfaces 14i and 14j of the second embodiment, inclined surfaces 24g, 24h, 34g, 34h, 45g and 45h are provided on the key side guide members 24, 34 and 45. Since the other parts are the same as those of the second embodiment, the same reference numerals as those of the second embodiment are used, only the matters relating to the deformed parts are explained, and the explanations concerning the other parts are omitted.

  In this first modified example, the left and right corners of the rear ends of the protrusions 24d, 34d, and 45d of the key side guide members 24, 34, and 45 are notched, and the left and right corners of the rear ends of the protrusions 24d, 34d, and 45d are cut out. Inclined surfaces (chamfers) 24g, 24h, 34g, 34h, 45g, and 45h that extend outward from the rear end toward the front at both ends are provided on the key-side guide members 24, 34, and 45, respectively. The inclined surfaces 24g, 24h, 34g, 34h, 45g, 45h are flat surfaces and extend from the lower end to the upper end of the key side guide members 24, 34, 45. The lateral widths of the inclined surfaces 24g, 24h, 34g, 34h, 45g, 45h are larger than the key guide clearance a. The inclined surfaces 24g, 24h, 34g, 34h, 45g, and 45h function as sub guides for allowing the protruding portions 24d, 34d, and 45d to enter the groove 14f.

  Also in this case, when the first to third key units 20, 30, and 40 are assembled to the key frame 10 without error, the frame side from the left and right inner ends of the inclined surfaces 24g, 24h, 34g, 34h, 45g, and 45h. Both distances to the left and right inner surfaces of the groove 14f of the guide member 14 are equal. If this distance is d, there is a relationship d> b between the pre-guide clearance b and the distance d. In this case as well, the pre-guide clearance b is set to be relatively large as in the case of the second embodiment.

  Also in the first modified example configured as described above, when the first to third key units 20, 30, and 40 are assembled to the key frame 10, first, as in the case of the first and second embodiments. Then, the left and right outer surfaces of the frame side guide member 14 are caused to enter the inner side surfaces of the left and right side walls 24b, 24c, 34b, 34c, 45b, and 45c of the key side guide members 24, 34, and 45, thereby The left and right outer surfaces and the inner side surfaces of the left and right side walls 24b, 24c, 34b, 34c, 45b, and 45c of the key side guide members 24, 34, and 45 are exhibited. In this state, since there is a relationship of d> b between the distance d and the pre-guide clearance b, as shown in FIG. 14B, the front end (or right inner surface) of the left inner surface of the groove 14f. The front end) is located on the inner side of the left outer end of the inclined surfaces 24g, 34g, 45g (or the right outer end of the inclined surfaces 24h, 34h, 45h).

  Next, the first to third key units 20, 30, 40 are moved rearward in order to allow the protrusions 24d, 34d, 45d to enter the groove 14f. In this case, if the left and right outer surfaces of the protrusions 24d, 34d, and 45d are within the lateral width of the groove 14f, the protrusions 24d, 34d, and 45d directly enter the groove 14f. Even if the left and right outer surfaces of the protrusions 24d, 34d, and 45d are not within the lateral width of the groove 14f, the front end of the left inner surface (or the front end of the right inner surface) of the groove 14f is inclined surfaces 24g, 34g, and 45g. (Or inclined surfaces 24h, 34h, 45h) in the front-rear direction. Therefore, in this case, the front end of the left inner surface (or the front end of the right inner surface) of the groove 14f is inclined surfaces 24g, 34g, 45g due to the backward movement of the first to third key units 20, 30, 40. (Or the inclined surfaces 24h, 34h, 45h), the projecting portions 24d, 34d, 45d move obliquely rearward and forward of the inclined surfaces 24g, 34g, 45g (or the inclined surfaces 24h, 34h, 45h). The left outer surface (or right outer surface) of the protrusions 24d, 34d, and 45d starts to engage with the left inner surface (or right inner surface) of the groove 14f. And if the 1st thru | or 3rd key unit 20,30,40 is moved further back, protrusion part 24d, 34d, 45d will penetrate | invade in the groove | channel 14f.

  In the first modification as described above, before the protrusions 24d, 34d, and 45d enter the groove 14f, the front end of the left inner end of the groove 14f (or the front end of the right inner surface) is the inclined surface 24g, Since it is located inside the left outer end of 34g, 45g (or the right outer end of the inclined surfaces 24h, 34h, 45h), the protrusions 24d, 34d, 45d can be easily inserted into the groove 14f. Further, since the distance d is larger than the pre-guide clearance b and the relationship between the distance d and the pre-guide clearance b only needs to be d> b, the pre-guide clearance b should be made considerably larger than the key guide clearance a. Compared to the case of the first embodiment, the left and right outer surfaces of the frame side guide member 14 are arranged on the inner side surfaces of the left and right side walls 24b, 24c, 34b, 34c, 45b, 45c of the key side guide members 24, 34, 45. It becomes possible to enter more easily.

  Further, the protrusions 24d, 34d, and 45d can be easily inserted into the groove 14f without fine adjustment of the first to third key units 20, 30, and 40 in the left-right direction. Therefore, the key guide clearance a can be made extremely small, and the lateral shaking of the white keys 21 and 31 and the black key 41 when pressing and releasing keys can be minimized.

b2. Second Modification Next, a second modification of the second embodiment will be described with reference to FIG. FIG. 15A is a plan view of the key-side guide members 24, 34, 45 and the frame-side guide member 14 according to a second modification corresponding to FIG. 13A of the second embodiment. FIG. 15B is a plan view of the key side guide members 24, 34, 45 and the frame side guide member 14 in the process of assembling the first to third key units 10, 20, 30 to the key frame 10. 13 (B). This second modification is provided with the inclined surfaces 24g, 24h, 34g, 34h, 45g, and 45h of the first modification in addition to the inclined surfaces 14i and 14j of the second embodiment. Since this is the same as the second embodiment and the first modification thereof, the same reference numerals as those of the second embodiment and the first modification are used, and only the matters relating to the deformed portion are described and the explanation relating to the other portions. Is omitted.

  In the second modification, the inclined surfaces 14i and 14j and the inclined surfaces 24g, 24h, 34g, 34h, 45g, and 45h function as sub guides for allowing the protruding portions 24d, 34d, and 45d to enter the groove 14f. . The distances from the left and right inner ends of the inclined surfaces 24g, 24h, 34g, 34h, 45g, and 45h to the left and right outer ends of the inclined surfaces 14i and 14j of the frame side guide member 14 are equal. When this distance is e, there is a relationship e> b between the pre-guide clearance b and the distance e. In this case, since the distance e close to a value obtained by adding the distance c of the second embodiment and the distance d of the first modification can be set, the pre-guide clearance b is the same as that of the second embodiment. It is set larger than in the case of the first modification.

  Also in the second modified example configured as described above, when the first to third key units 20, 30, 40 are assembled to the key frame 10, first, the first embodiment, the second embodiment, and the first embodiment are described. Similarly to the case of the first modification, the left and right outer surfaces of the frame side guide member 14 enter the inner side surfaces of the left and right side walls 24b, 24c, 34b, 34c, 45b, 45c of the key side guide members 24, 34, 45. Thus, a pre-guide function between the left and right outer surfaces of the frame side guide member 14 and the inner side surfaces of the left and right side walls 24b, 24c, 34b, 34c, 45b, and 45c of the key side guide members 24, 34, and 45 is exhibited. In this state, there is a relationship of e> b between the distance e and the pre-guide clearance b. Therefore, as shown in FIG. 15B, the inclined surfaces 24g, 34g of the protrusions 24d, 34d, 45d. 45g and the inner ends of the inclined surfaces 24h, 34h, 45h are located between both outer ends of the inclined surfaces 14i, 14j.

  Next, the first to third key units 20, 30, and 40 are moved backward in order to allow the protrusions 24 d, 34 d, and 45 d to enter the groove 14. In this case, if the left and right outer surfaces of the protrusions 24d, 34d, and 45d are within the lateral width of the groove 14f, the protrusions 24d, 34d, and 45d directly enter the groove 14f. Even if the left and right outer surfaces of the protrusions 24d, 34d, and 45d are not within the lateral width of the groove 14f, the inner ends (or the inclined surfaces 24h, 24h, and 24h of the inclined surfaces 24g, 34g, and 45g of the protrusions 24d, 34d, and 45d). The inner ends of 34h and 45h face the inclined surface 14i (or 14j) in the front-rear direction. Accordingly, in this case, the inner ends of the inclined surfaces 24g, 34g, and 45g (or the inner ends of the inclined surfaces 24h, 34h, and 45h) are moved by the backward movement of the first to third key units 20, 30, and 40. While contacting the inclined surface 14i (or 14j), the projecting portions 24d, 34d, 45d move obliquely rearward, and projecting portions ahead of the inclined surfaces 24g, 34g, 45g (or the inclined surfaces 24f, 34f, 45f). The left outer surface (or right outer surface) of 24d, 34d, and 45d starts to engage with the left inner surface (or right inner surface) of the groove 14f behind the inclined surfaces 14i and 14j. And if the 1st thru | or 3rd key unit 20,30,40 is moved further back, protrusion part 24d, 34d, 45d will penetrate | invade in the groove | channel 14f.

  In the second modification as described above, before the projecting portions 24d, 34d, 45d enter the groove 14f, the inclined surfaces 24g, 34g, 45g and the inclined surfaces 24h, 34h of the projecting portions 24d, 34d, 45d are provided. 45h is located between the outer ends of the inclined surfaces 14i and 14j, so that the protrusions 24d, 34d and 45d can be easily inserted into the groove 14f. Further, since the distance e is larger than the pre-guide clearance b and the relationship between the distance e and the pre-guide clearance b only needs to be a relationship of e> b, the pre-guide clearance b should be made considerably larger than the key guide clearance a. Compared with the case of the second embodiment and the first modification thereof, the left and right outer surfaces of the frame side guide member 14 are connected to the left and right side walls 24b, 24c, 34b, 34c of the key side guide members 24, 34, 45, respectively. It becomes possible to more easily enter the inside surfaces of 45b and 45c.

  Further, the protrusions 24d, 34d, and 45d can be easily inserted into the groove 14f without fine adjustment of the first to third key units 20, 30, and 40 in the left-right direction. Therefore, similarly to the second embodiment and the first modification thereof, the key guide clearance a can be made extremely small, and the lateral shake of the white keys 21 and 31 and the black key 41 at the time of pressing and releasing keys is minimized. Can be suppressed.

b3. Application of First to Third Modifications of First Embodiment In the second embodiment and its first and second modifications, the frame-side guide member 14 has inclined surfaces 14i, The example in which 14j is provided and / or the inclined surfaces 24g, 24h, 34g, 34h, 45g, and 45h are provided on the key side guide members 24, 34, and 45 has been described. However, as in the second embodiment, the first and second modifications, the frame-side guide member 14 is provided with the inclined surfaces 14i, 14j, and / or the key-side guide members 24, 34, 45 are provided with the inclined surfaces 24g, Providing 24h, 34g, 34h, 45g, and 45h can also be applied to the first to third modifications of the first embodiment.

c. Third Embodiment In the first and second embodiments and various modifications thereof, when the first to third key units 20, 30, 40 are assembled to the key frame 10, the first to third After the first to third key units 20, 30, 40 are tilted so that the rear ends of the key units 20, 30, 40 are positioned higher than the front ends, the key side The example in which the guide members 24, 34, 45 are engaged with the frame-side guide member 14 from the front has been described. However, when the first to third key units 20, 30, and 40 are assembled to the key frame 10, the rear ends of the first to third key units 20, 30, and 40 are positioned higher than the front end. After the first to third key units 20, 30, 40 are tilted as described above, the key side guide members 24, 34, 45 are engaged with the frame side guide member 14 from above. There is also.

  A keyboard apparatus suitable for assembling the first to third key units 20, 30, and 40 to the key frame 10 by such a method will be described as a third embodiment. In the third embodiment, the key side guide members 24, 34, and 45 or the frame side guide member 14 may be configured as follows. Since other configurations are the same as those in the first embodiment, the description thereof is omitted.

  Also in the third embodiment, the key side guide members 24, 34, 45 and the frame side guide member 14 that are substantially the same as those in the first embodiment described above with reference to FIG. 9 are employed. Accordingly, the key-side guide members 24, 34, 45 and the frame-side guide member 14 are also denoted by the same reference numerals, the description thereof will be omitted or simplified, and different points will be mainly described. The difference is that projections 24d ', 34d' and 45d 'are employed instead of the projections 24d, 34d and 45d of the key side guide members 24, 34 and 45 of the first embodiment. As shown in the rear view of FIG. 16 when the key side guide members 24, 34, 45 are viewed from the rear, the lengths of the protrusions 24d ′, 34d ′, 45d ′ are the protrusions 24d of the first embodiment. 34d, 45d is shorter than the vertical length, and the lower ends of the protrusions 24d ', 34d', 45d 'are lower than the lower ends of the front walls 24a, 34a, 45a and the left and right side walls 24b, 24c, 34b, 34c, 45b, 45c. Is also positioned above a predetermined distance. This is because the key side guide members 24, 34, 45 are engaged with the frame side guide member 14 from above. The lower ends of the projecting portions 24d ', 34d', 45d 'are positioned above the lower ends of the front walls 24a, 34a, 45a and the left and right side walls 24b, 24c, 34b, 34c, 45b, 45c. In the embodiment, this corresponds to the rear ends of the protruding portions 24d, 34d, and 45d being positioned in front of the left and right side walls 24b, 24c, 34b, 34c, 45b, and 45c. The thicknesses and positions of the protrusions 24d ', 34d', and 45d 'are the same as those in the first embodiment.

  As described above, when the key-side guide members 24, 34, 45 are engaged with the frame-side guide member 14 from above, the positions of the first to third key units 20, 30, 40 are adjusted in the left-right direction. However, the rear ends of the first to third key units 20, 30, 40 are moved downward to bring the key side guide members 24, 34, 45 closer to the frame side guide member 14 from above. Also in this case, the rear end portions of the first to third key units 20, 30, 40 are first engaged with the key side guide members 24, 34, 45 to the frame side guide member 14 at the pre-guide portion. Move further down. The first to third key units 20, 30, 40 are moved in the left-right direction before the key guide unit enters a state in which the white keys 21, 31 and the black key 41 are guided to swing in the up-down direction during the key release operation. The key side guide members 24, 34, 45 are engaged with the frame side guide member 14 by the key guide portion, and then the rear end portions of the first to third key units 20, 30, 40 are moved. While moving further downward, the first to third key units 20, 30, 40 are moved backward to assemble the first to third key units 20, 30, 40 to the key frame 10.

  Specifically, first, the rear end portions of the first to third key units 20, 30, 40 are moved downward while adjusting the horizontal position of the first to third key units 20, 30, 40. Thus, the left and right side surfaces 14c and 14d of the frame side guide member 14 are caused to enter the inside of the left and right side walls 24b, 24c, 34b, 34c, 45b and 45c of the key side guide members 24, 34 and 45 from above. Then, before the protrusions 24d ′, 34d ′, 45d ′ enter the groove 14f, the first to third key units 20 are adjusted while adjusting the horizontal positions of the first to third key units 20, 30, 40. , 30, 40 are further moved downward to cause the protrusions 24d ', 34d', 45d 'to enter the groove 14f. Thereafter, the rear end portions of the first to third key units 20, 30, 40 are moved further downward, and the first to third key units 20, 30, 40 are moved rearward to move the first to third keys. The units 20, 30, and 40 are assembled to the key frame 10.

  Also in the third embodiment, as in the first embodiment, the pre-guide clearance b is larger than the key guide clearance a, and the pre-guide clearance b can be increased to some extent. Therefore, the left and right side surfaces 14c, 14d can be easily penetrated into the left and right side walls 24b, 24c, 34b, 34c, 45b, 45c of the key side guide members 24, 34, 45. That is, the inner side surfaces of the left and right side walls 24b, 24c, 34b, 34c, 45b, and 45c of the key side guide members 24, 34, and 45, which are pre-guide portions, and the left and right side surfaces 14c and 14d of the frame side guide member 14 are easily obtained. Can be engaged.

  In the third embodiment, as described above, the rear end portions of the first to third key units 20, 30, 40 are moved downward, and the left and right side surfaces 14c, 14d of the frame side guide member 14 are moved. In an initial state of entering the inside of the left and right side walls 24b, 24c, 34b, 34c, 45b, 45c of the key side guide members 24, 34, 45, the lower ends of the protrusions 24d ′, 34d ′, 45d ′ are the left and right side walls 24b, It is located above the lower ends of 24c, 34b, 34c, 45b, 45c. Therefore, in this state, the left and right side surfaces 14c and 14d of the frame side guide member 14 protrude when entering the inside of the left and right side walls 24b, 24c, 34b, 34c, 45b and 45c of the key side guide members 24, 34 and 45. The lower ends of the portions 24d ′, 34d ′, and 45d ′ do not contact the upper surface 14e of the frame side guide member 14, and enter the inner sides of the left and right side walls 24b, 24c, 34b, 34c, 45b, and 45c of the left and right side surfaces 14c and 14d. Intrusion is not hindered by the protrusions 24d ′, 34d ′, 45d ′.

  In this case as well, before the protrusions 24d ', 34d', 45d 'enter the groove 14f, the left and right side positions of the key side guide members 24, 34, 45 are the left and right side walls which are pre-guide parts. The inner side surfaces of 24b, 24c, 34b, 34c, 45b, and 45c and the left and right side surfaces 14c and 14d of the frame side guide member 14 are regulated. Therefore, the adjustment amount of the position in the left-right direction of the first to third key units 20, 30, 40 for allowing the protrusions 24d ′, 34d ′, 45d ′ to enter the groove 14f can be reduced, and the protrusions 24d ′, 34d 'and 45d' can be easily penetrated into the groove 14f. That is, the left and right side surfaces of the projecting portions 24d ', 34d', and 45d ', which are key guide portions, can be easily engaged with the left and right inner side surfaces of the groove 14f. As a result, also in the third embodiment, as in the case of the first embodiment, even if the key guide clearance a is reduced in order to prevent the lateral movement of the key during the pressing / releasing key operation, the first to The work of assembling the third key units 20, 30, 40 to the key frame 10 is simplified. And the deformation | transformation of the member which comprises a key guide part is also prevented by this ease of assembly | attachment.

c1. First Modification Next, a first modification of the third embodiment will be described with reference to FIG. FIG. 17A is a perspective view of a frame side guide member 14 according to a first modification of the third embodiment, and FIG. 17B is a plan view of the frame side guide member 14. This first modification is a modification of only the frame-side guide member 14 of the third embodiment, and the other parts are the same as those of the third embodiment, so the first to third embodiments and The same reference numerals as those of the various modifications are used, only matters relating to the deformed portion are described, and descriptions relating to other portions are omitted.

  In the first modified example, a plurality of inclined surfaces (chamfered) are formed on the outer end of the upper end portion of the frame side guide member 14 by notching all corner portions except for the rear surface 14 side. The inclined surfaces (chamfers) 14m and 14n are notched at the corners of the left and right side surfaces 14c and 14d and the upper surface 14e, respectively, and spread outward as they go downward from the upper surface 14e. The inclined surfaces 14m and 14n are flat surfaces and extend in the front-rear direction. Note that the widths of the inclined surfaces 14m and 14n in the left-right direction are larger than the key guide clearance a and the pre-guide clearance b. The inclined surfaces 14m and 14n perform the same functions as the inclined surfaces 14g and 14h of the first and third modified examples of the first embodiment, and are provided after the first to third key units 20, 30, and 40. The left and right side surfaces 14c and 14d of the frame side guide member 14 are moved to the inner side surfaces of the left and right side walls 24b, 24c, 34b, 34c, 45b and 45c of the key side guide members 24, 34 and 45 when the end portion is moved downward. It functions as a sub-guide (ie, a sub-guide for the pre-guide part) when making it enter.

  The inclined surfaces (chamfers) 14o and 14p are cut out from the left and right side surfaces of the groove 14f and the corners of the upper surface 14e, respectively, and spread outward as they go downward from the upper surface 14e. The inclined surfaces 14o and 14p are flat surfaces and extend in the front-rear direction. Note that the widths of the inclined surfaces 14o and 14p in the left-right direction are larger than the key guide clearance a. The inclined surfaces 14o and 14p exhibit the same type of functions as the inclined surfaces 14i and 14j of the second embodiment and the second modification thereof, and the rear end portions of the first to third key units 20, 30, and 40. The sub-guide (that is, the key) when the protrusions 24d ′, 34d ′, 45d ′ of the key-side guide members 24, 34, 45 are inserted into the grooves 14f of the frame-side guide member 14 when the key-side guide members 24, 34, 45 are moved downward. It functions as a sub-guide of the guide guide part. Then, as in the case of the inclined surfaces 14i and 14j (see FIG. 13) of the second embodiment, from the left and right outer ends of the inclined surfaces 14o and 14p to the left and right outer ends of the projecting portions 24d ′, 34d ′, and 45d ′. Both distances c are both distances from the left and right side surfaces 14c, 14d of the frame side guide member 14 to the inner side surfaces of the left and right side walls 24b, 24c, 34b, 34c, 45b, 45c of the key side guide members 23, 34, 45. It is larger than the guide clearance b (c> b).

  The other inclined surfaces provided on the outer end of the upper end of the frame side guide member 14 are not so much related to the assembly of the first to third key units 20, 30, 40 to the key frame 10, and thus detailed description thereof is omitted. To do. In the frame side guide member 14 according to the first modified example, the inclined surfaces 14g and 14h of the first and third modified examples of the first embodiment described above, and the inclined surfaces of the second embodiment and the second modified example thereof. 14i and 14j are also provided.

  In the first modified example configured as described above, the rear end portions of the first to third key units 20, 30, 40 are moved downward, and the left and right side surfaces 14c, 14d of the frame side guide member 14 are moved to the key side guide. When entering the inside of the left and right side walls 24b, 24c, 34b, 34c, 45b, 45c of the members 24, 34, 45, the inside of the lower surface of the right side walls 24c, 34c, 45c (or the left side walls 24b, 34b, 45b) The end may be accommodated within the width in the left-right direction of the inclined surface 14n (or inclined surface 14m). When the rear end portions of the first to third key units 20, 30, 40 are moved downward, the key side guide members 24, 34, 45 are moved to the inner side surfaces (or left side walls) of the right side walls 24c, 34c, 45c. 24b, 34b, 45b are moved obliquely downward while contacting the lower end of the inclined surface 14m (or inclined surface 14n) to the inner side surface (or the left side walls 24b, 34b) of the right side walls 24c, 34c, 45c. , 45b) starts to engage with the right side surface 14d (or the left side surface 14c) of the frame side guide member 14. Therefore, the left and right side surfaces 14c and 14d of the frame side guide member 14 can be easily inserted into the left and right side walls 24b, 24c, 34b, 34c, 45b and 45c of the key side guide members 24, 34 and 45, respectively. The same effect as that of the first modification of the embodiment can be expected.

  Further, the rear end portions of the first to third key units 20, 30, 40 are further moved downward, and the protruding portions 24 d ′, 34 d ′, 45 d ′ of the key side guide members 24, 34, 45 are moved to the frame side guide. When intruding into the groove 14f of the member 14, as in the case of the second embodiment, there is a relationship c> b between the distance c and the pre-guide clearance b. The left and right ends of the lower surfaces of 34d 'and 45d' are located between the left end of the inclined surface 14o and the right end of the inclined surface 14p. Therefore, if the rear end portions of the first to third key units 20, 30, 40 are moved downward, the key side guide members 24, 34, 45 are placed on the left side of the lower surfaces of the projecting portions 24d ′, 34d ′, 45d ′. The left side surface (or the right side surface) of the protrusions 24d ', 34d', 45d 'is formed in the groove 14f by moving the end (or right side end) obliquely downward while contacting the inclined surface 14o (or the inclined surface 14p). Engage with the left inner surface (or right inner surface). As a result, the protruding portions 24d ′, 34d ′, 45d ′ of the key side guide members 24, 34, 45 can be easily inserted into the grooves 14f of the frame side guide member 14, and are the same as in the second embodiment. The effect can be expected.

c2. Second Modification Next, a second modification of the third embodiment will be described with reference to FIG. 18A is a perspective view of the key side guide members 24, 34, 45 according to the second modification of the third embodiment as viewed from below, and FIG. 18B is the key side guide members 24, 34, 45, 45 is a bottom view of 45. FIG. In the second modification, only the key-side guide members 24, 34, and 45 of the third embodiment are modified, and the other parts are the same as those of the third embodiment. The same reference numerals are used as in the case of the third embodiment and the various modifications thereof, and only matters relating to the deformed portion are described, and descriptions relating to other portions are omitted.

  In the second modified example, inclined surfaces (chamfers) 24i, 34i, 34i, 34i, 34b, 45b are provided on the inner ends of the lower ends of the left side walls 24b, 34b, 45b and the right side walls 24c, 34c, 45c of the key side guide members 24, 34, 45. 45i and inclined surfaces (chamfers) 24j, 34j, and 45j are provided. The inclined surfaces 24i, 34i, and 45i are cut out at the corners of the inner side surface and the lower surface of the left side walls 24b, 34b, and 45b, respectively, and spread outward as they go upward from the lower surface. The inclined surfaces 24j, 34j, 45j are notched at the corners of the inner side surface and the lower surface of the right side walls 24c, 34c, 45c, respectively, and spread outward as they go upward from the lower surface. The inclined surfaces 24i, 24j, 34i, 34j, 45i, 45j are flat surfaces and extend in the front-rear direction. The lateral width of the inclined surfaces 24i, 24j, 34i, 34j, 45i, 45j is larger than the key guide clearance a and the pre-guide clearance b. The inclined surfaces 24i, 24j, 34i, 34j, 45i, 45j exhibit the same type of functions as the inclined surfaces 24e, 24f, 34e, 34f, 45e, 45f of the second and third modifications of the first embodiment. Thus, when the rear ends of the first to third key units 20, 30, 40 are moved downward, the left and right side surfaces 14c, 14d of the frame side guide member 14 are moved to the left and right sides of the key side guide members 24, 34, 45. It functions as a sub-guide (that is, a sub-guide for the pre-guide portion) when entering the inner surface of the side walls 24b, 24c, 34b, 34c, 45b, 45c.

  Inclined surfaces 24m, 34m, 45m and inclined surfaces 24n, 34n, 45n are provided on the left outer end and right outer end of the lower ends of the protruding portions 24d ', 34d', 45d 'of the key side guide members 24, 34, 45, respectively. Each is provided. The inclined surfaces 24m, 34m, and 45m are notched at the corners of the left outer surface and the lower surface of the projecting portions 24d ', 34d', and 45d ', and are spread outwardly from the lower surface toward the upper side. The inclined surfaces 24n, 34n, and 45n are notched at the corners of the right outer surface and the lower surface of the projecting portions 24d ', 34d', and 45d ', and are spread outwardly from the lower surface toward the upper side. The inclined surfaces 24m, 24n, 34m, 34n, 45m, 45n are flat surfaces and extend in the front-rear direction. The lateral widths of the inclined surfaces 24m, 24n, 34m, 34n, 45m, 45n are larger than the key guide clearance a. The inclined surfaces 24m, 24n, 34m, 34n, 45m, and 45n exhibit the same type of functions as the inclined surfaces 24g, 24h, 34g, 34h, 45g, and 45h of the first and second modified examples of the second embodiment. Thus, when the rear end portions of the first to third key units 20, 30, 40 are moved downward, the protruding portions 24d ', 34d', 45d 'of the key side guide members 24, 34, 45 are moved to the frame side. The guide member 14 functions as a sub guide (that is, a sub guide of the key guide guide portion) when entering the groove 14f. Then, similarly to the inclined surfaces 24g, 24h, 34g, 34h, 45g, and 45h (see FIG. 14) of the first modification of the second embodiment, the inclined surfaces 24m, 24n, 34m, 34n, 45m, and 45n are used. Both distances d from the left and right inner ends of the frame side guide member 14 to the left and right inner surfaces of the groove 14f of the frame side guide member 14 are determined from the left and right side surfaces 14c and 14d of the frame side guide member to the left and right side walls 24b and 24c of the key side guide members 24, 34 and 45. , 34b, 34c, 45b, 45c, which is larger than the pre-guide clearance b, which is the distance to the inner surface (d> b).

  Further, in the key side guide members 24, 34, 45, the inner end of the lower end portion of the front walls 24a, 34a, 45a, the front end of the lower end portion of the left side walls 24b, 34b, 45b, and the lower end of the right side walls 24c, 34c, 45c. Inclined surfaces are also provided at the front ends of the protrusions and at the front ends of the lower ends of the protrusions 24d ′, 34d ′, and 45d ′. However, these inclined surfaces are not so much related to the assembly of the first to third key units 20, 30, 40 to the key frame 10, and thus detailed description thereof is omitted.

  In the second modified example configured as described above, the rear end portions of the first to third key units 20, 30, 40 are moved downward, and the left and right side surfaces 14c, 14d of the frame side guide member 14 are moved to the key side guide. When entering the inside of the left and right side walls 24b, 24c, 34b, 34c, 45b, 45c of the members 24, 34, 45, the upper ends of the right side surface 14d (or the left side surface 14c) of the frame side guide member 14 are inclined surfaces 24j. , 34j, 45j (or inclined surfaces 24i, 34i, 45i) may be within the width in the left-right direction. Then, if the rear end portions of the first to third key units 20, 30, 40 are moved downward, the key side guide members 24, 34, 45 are inclined on the upper end of the right side surface 14d (or the left side surface 14c). 24j, 34j, 45j (or inclined surfaces 24i, 34i, 45i) while moving in an obliquely downward direction while abutting on the inner surfaces (or inner surfaces of the left walls 24b, 34b, 45b) of the right walls 24c, 34c, 45c Begins to engage with the right side surface 14d (or the left side surface 14c) of the frame side guide member 14. Therefore, the left and right side surfaces 14c and 14d of the frame side guide member 14 can be easily inserted into the left and right side walls 24b, 24c, 34b, 34c, 45b and 45c of the key side guide members 24, 34 and 45, respectively. The same effect as that of the second modification of the embodiment can be expected.

  Further, the rear end portions of the first to third key units 20, 30, 40 are further moved downward, and the protruding portions 24 d ′, 34 d ′, 45 d ′ of the key side guide members 24, 34, 45 are moved to the frame side guide. When entering the groove 14f of the member 14, since there is a relationship d> b between the distance d and the pre-guide clearance b as in the case of the first modification of the second embodiment, the groove The upper end of the left inner surface of 14f (or the upper end of the right inner surface) is located inside the left outer end (or right outer end) of the inclined surfaces 24m, 34m, 45m (or inclined surfaces 24n, 34n, 45n). Accordingly, if the rear end portions of the first to third key units 20, 30, 40 are moved downward, the key-side guide members 24, 34, 45 will be the upper ends of the left inner surface (or right inner surface) of the groove 14f. Is moved obliquely downward while contacting the inclined surfaces 24m, 34m, 45m (or inclined surfaces 24n, 34n, 45n), and the left side surfaces (or right side surfaces) of the projecting portions 24d ', 34d', 45d 'are grooves. 14f begins to engage with the left inner surface (or right inner surface). Therefore, the protrusions 24d ', 34d', 45d 'of the key side guide members 24, 34, 45 can be easily inserted into the groove 14f of the frame side guide member 14, and the first modification of the second embodiment is performed. The same effect as the example can be expected.

  In the key side guide members 24, 34, 45 according to the second modification, the inclined surfaces 24e, 24f, 34e, 34f, 45e, 45f of the second and third modifications of the first embodiment described above are also provided. In addition, the inclined surfaces 24g, 24h, 34g, 34h, 45g, and 45h of the first and second modifications of the second embodiment may be provided.

d. Other Modifications The keyboard device according to the present invention is not limited to the first to third embodiments and various modifications thereof, and can be implemented with appropriate modifications.

  In the first to third embodiments and various modifications thereof, all the inclined surfaces 14g, 14h, 14i, 14j, 14m, 14n, 14o, 14p, 24e, 34e, 45e, 24f, 34f, 45f, 24g, Although 34g, 45g, 24h, 34h, 45h, 24i, 34i, 45i, 24j, 34j, 45j, 24m, 34m, 45m, 24n, 34n, 45n are planes, a part or all of these inclined surfaces are Instead of a flat surface, it may be curved or spherical.

  In the first to third embodiments and various modifications thereof, the guide member having the groove 14f is the frame side guide member 14 formed integrally with the key frame 10, and the left and right side walls 24b, 24c, 34b. , 34 c, 45 b, 45 c and guide members 24, 34 formed integrally with the white keys 21, 31 and the black key 41, with guide members having protrusions 24 d, 34 d, 45 d, 24 d ′, 34 d ′, 45 d ′. , 45. However, the guide member having the groove 14f is a key side guide member formed integrally with the white key 21, 31 and the black key 41, and the left and right side walls 24b, 24c, 34b, 34c, 45b, 45c and the projecting portion 24d, The guide member having 34d, 45d, 24d ′, 34d ′, and 45d ′ may be a frame-side guide member that is formed integrally with the key frame 10. That is, the above-described key-side guide members 24, 34, and 45 may be provided on the key frame 10 side, and the above-described frame-side guide member 14 may be provided on the white keys 21 and 31 and the black key 41 side, respectively.

  In this case, the frame side guide member 14 is formed so that the front surface 14a of the frame side guide member 14 faces rearward, and is integrally formed with the white keys 21, 31 and the black key 41. Further, the front walls 24a, 34a, 45a of the key-side guide members 24, 34.45 are positioned rearward, and the left and right side walls 24b, 24c, 34b, 34c, 45b, 45c and the protruding portions 24d, 34d, 45d, 24d ′. , 34d ′, 45d ′ are arranged so as to protrude forward and are formed integrally with the key frame 10. In this case, the lower surface of the guide member (the frame side guide member 14 described above) provided on the white keys 21 and 31 and the black key 41 side is the guide member (the key side guide described above) provided on the key frame 10 side. The lower surface of the members 24, 34, 45), that is, the upper surface of the lower wall 11 of the key frame 10 is positioned a predetermined distance above.

  When the first to third key units 20, 30, 40 are assembled to the key frame 10, the guide members (the frame-side guide member 14 described above) provided on the white keys 21, 31 and the black key 41 side are provided. The left and right side surfaces 14c and 14d are allowed to enter the left and right side walls 24b, 24c, 34b, 34c, 45b, and 45c of the guide member (the above-described key side guide members 24, 34, and 45) provided on the key frame 10 side. Further, the protrusions 24d, 34d, 45d, 24d ′, 34d ′, and 45d ′ of the guide members (key side guide members 24, 34, and 45 described above) provided on the key frame 10 side are replaced with the white keys 21 and 31 and the black keys. It is made to enter the groove 14f of the guide member (frame side guide member 14 described above) provided on the 41 side. Then, the guide members provided on the white keys 21, 31 and the black key 41 side (the above-described frame side guide member 14) are replaced with the guide members provided on the key frame 10 side (the above-described key side guide members 24, 34, 45). Engage.

  In the first to third embodiments and various modifications thereof, the left and right side surfaces 14c and 14d of the frame side guide member 14 and the left and right side walls 24b, 24c, 34b and 34c of the key side guide members 24, 34 and 45 are provided. The inner side surfaces of 45b and 45c constitute a pre-guide portion, and the groove 14f of the frame side guide member 14 and the protruding portions 24d, 34d, 45d, 24d ′, 34d ′, and 45d of the key side guide members 24, 34, and 45 'And the key guide part are configured. However, instead of this, the groove 14f and the protrusions 24d, 34d, 45d, 24d ', 34d', 45d 'constitute a pre-guide part, and the left and right side surfaces 14c, 14d and the left and right side walls 24b, 24c, 34b, You may make it comprise a key guide part with the inner surface of 34c, 45b, 45c. In this case, the distance between the inner side surface of the groove 14f and the side surfaces of the protrusions 24d, 34d, 45d, 24d ′, 34d ′, and 45d ′ (the above-described key guide clearance a), the left and right side surfaces 14c and 14d, and the left and right side walls 24b, The relationship between the distances from the inner surfaces of 24c, 34b, 34c, 45b, and 45c (pre-guide clearance b described above) is reversed so that a> b.

  In this case, when the key side guide members 24, 34, 45 are engaged with the frame side guide member 14 from the front as in the first and second embodiments and various modifications thereof, the protruding portions 24 d, The length in the front-rear direction of 34d, 45d is made longer than the length in the front-rear direction of the left and right side walls 24b, 24c, 34b, 34c, 45b, 45c, and the depth of the groove 14f is also in the front-rear direction of the protrusions 24d, 34d, 45d. Deepen to fit the length. On the other hand, when the key side guide members 24, 34, 45 are engaged with the frame side guide member 14 from above as in the third embodiment and various modifications thereof, the protruding portions 24d ′, 34d ′, 45d are used. The vertical length of 'is made longer than the vertical length of the left and right side walls 24b, 24c, 34b, 34c, 45b, 45c, and the lower end positions of the projecting portions 24d', 34d ', 45d' 24c, 34b, 34c, 45b, and 45c above the lower end position. When the first to third key units 20, 30, 40 are assembled to the key frame 10, first, the protruding portions 24d, 34d, 45d, 24d ′, 34d ′, 45d ′ enter the groove 14f, Next, the left and right side surfaces 14c, 14d of the frame side guide member 14 are allowed to enter the left and right side walls 24b, 24c, 34b, 34c, 45b, 45c of the key side guide members 24, 34, 45.

  In the first to third embodiments and the various modifications thereof, the connecting portion 23 of the first key unit 20, the connecting portion 33 of the second key unit 30, and the connecting portion 43 of the third key unit 40 are keyed. The frame 10 is placed in order on the upper wall 13, the hook portion 44 provided in the third key unit 40 is passed through the connecting portions 33, 44 and the upper wall 13, and the locking claw 44 a is engaged with the lower surface of the upper wall 13. After that, the first to third key units 20, 30, 40 are assembled and fixed to the key frame 10 with screws. However, the method of assembling and fixing the first to third key units 20, 30, 40 to the key frame 10 is not limited to the above method, and various methods can be adopted. For example, the hook portion 44 is omitted, and the connecting portions 23, 33, 43 of the first to third key units 20, 30, 40 are simply fixed to the upper wall 13 of the key frame 10 with screws or an adhesive is used. May be fixed.

  Further, in the first to third embodiments and the various modifications thereof, the first key unit 20 in which the plurality of white keys 21 are integrally formed, the second key unit 20 in which the plurality of white keys 31 are integrally formed, and the plurality The third key unit 30 integrally formed with the black key 41 is assembled to the key frame 10. However, the present invention is also applied to the case where one white key and one black key are assembled to the key frame 10 independently.

DESCRIPTION OF SYMBOLS 10 ... Key frame, 14 ... Frame side guide member, 14a ... Front surface, 14b, 14c ... Side surface, 14f ... Groove, 14g, 14h, 14i, 14j, 14m, 14n, 14o, 14p ... Inclined surface, 20 ... 1st key Unit: 21 ... White key, 24 ... Key side guide member, 24a ... Front wall, 24b, 24c ... Side wall, 24d, 24d '... Projection, 24e, 24f, 24g, 24h, 24i, 24j, 24m, 24n ... Inclination Surface, 30 ... second key unit, 31 ... white key, 34 ... key side guide member, 34a ... front wall, 34b, 34c ... side wall, 34d, 34d '... projection, 34e, 34f, 34g, 34h, 34i, 34j, 34m, 34n ... inclined surface, 40 ... third key unit, 41 ... black key, 45 ... key side guide member, 45a ... front wall, 45b, 45c ... side wall, 45d, 45d '... projection, 4 e, 45f, 45g, 45h, 45i, 45j, 45m, 45n ... inclined surface

Claims (3)

A plurality of keys, and a key frame which supports a rear end portion of said plurality of keys, the keyboard which is adapted to swing the front end of the key depression and key release operation at the plurality of keys of said plurality of keys in the vertical direction In the device
Each key is provided with a key side guide member, and the key frame is provided with a frame side guide member corresponding to each key side guide member,
One guide member of each of the key side guide members and each of the frame side guide members has left and right outer surfaces extending in the front-rear direction, and has a left-right inner surface extending in the front-rear direction on one end surface in the front-rear direction. Comprising a groove having a side surface;
The other guide member of each of the key side guide members and each of the frame side guide members has left and right side walls that allow the one guide member to enter with the left and right inner surfaces facing the left and right outer surfaces of the one guide member. A projecting portion having left and right outer surfaces extending in the front-rear direction between the left and right side walls and having a left and right outer surface opposed to the left and right inner surfaces of the groove and entering the groove.
There is a predetermined clearance between the groove of the one guide member and the protruding portion of the other guide member, and the key is pressed by the groove of the one guide member and the protruding portion of the other guide member. Configure a key guide part that guides the vertical swing of the key during operation,
There is a clearance larger than the predetermined clearance between the left and right side walls of the other guide member and the left and right outer surfaces of the one guide member, and the left and right side walls of the other guide member and the left and right sides of the one guide member When the key is assembled to the key frame, the lateral position of the key with respect to the key frame is restricted with the outer side surface, and the key guide portion swings the key in the vertical direction during the key release operation. A pre-guide portion that guides the operation of assembling the key to the key frame until it is in a state of guiding the key, and
When the key is assembled to the key frame, the end of the protruding portion that enters into the groove is connected to the one guide member on the left and right side walls when the key is assembled to the key frame. A keyboard device characterized in that the keyboard device is located a predetermined distance away from an end portion on an intrusion side in a direction opposite to a direction in which the protrusion portion enters the groove . The keyboard device according to claim 1 ,
At the end of the left and right outer surfaces of the one guide member on the side that enters the left and right side walls of the other guide member when the key is assembled to the key frame, an inclined surface with the left and right ends cut out is provided. Or provided with an inclined surface in which the left and right inner side surfaces are cut off at the ends of the left and right side walls of the other guide member on the side where the one guide member is inserted when the key is assembled to the key frame. A keyboard device characterized by that. The keyboard device according to claim 1 or 2 ,
At the time of assembling the key to the key frame, an end surface of the projecting portion on the side that enters the groove is provided with an inclined surface with both left and right ends cut away, or the key is assembled to the key frame. A keyboard device characterized in that an inclined surface is formed by notching the left and right inner side surfaces at the end of the groove on the side into which the protruding portion enters when attaching.

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