JP5266729B2 - Keyboard device - Google Patents

Description

  The present invention relates to a keyboard device.

  Conventionally, in a keyboard device used for an electronic musical instrument, it is known to dispose a mass body such as a hammer in order to obtain a key touch feeling similar to that of an acoustic piano. That is, in this type of keyboard device, the hammer is composed of a metal hammer body and a synthetic resin hammer holder attached to the hammer body, and the hammer holder is rotatable with respect to the keyboard chassis. A rotating portion supported by the hammer is provided, and the hammer itself is rotatable. Then, when the stress of the key pressing operation is transmitted to one end of the hammer, the other end of the hammer rotates with the hammer rotating portion as a fulcrum, and this rotation is attached to the keyboard chassis on the other end side of the hammer. The vertical movement is regulated by abutting the two resin stoppers (see, for example, Patent Document 1).

JP 2006-3495 A

  However, in order to restrict the vertical movement of the hammer that accompanies key pressing and key release operations, it is necessary to place two stoppers for each key, and the stoppers must be bonded to all keys. I had to. For this reason, there is a problem that not only the assembly work time is increased but also the material cost of the stopper is increased, so that the manufacturing cost is increased.

  An object of the present invention is to provide a keyboard device used in an electronic musical instrument, which can regulate the rotation of the hammer without attaching upper and lower stoppers to the keyboard chassis, thereby reducing the number of parts and manufacturing costs. It is an object of the present invention to provide a keyboard device capable of reducing the number of keys.

In order to achieve the above object, a keyboard device according to a first aspect of the present invention includes a key, a metal hammer body, and an elastic member attached to the lower surface of the hammer body and having first and second contact portions. And a keyboard chassis supporting the key and the hammer, wherein the keyboard chassis includes a first rising surface and a second rising surface. And a fulcrum portion is formed on the hammer body above the protrusion, and the sides of the protrusion are opposed to the first rising surface and the second rising surface, respectively. And a first contact portion and a second contact portion of the elastic member are attached to each side of the recess portion, and the hammer body is accompanied by pressing and releasing the key. When rotating around the fulcrum part Said first and second equivalent portion was mounted on each side of the recess abut to each of the first raised surface and the second raised surface of the projecting portion for restricting the rotation of the hammer It is characterized by that.

The keyboard device according to claim 2 is characterized in that a fulcrum shaft is provided above the projecting portion, and the fulcrum portion of the hammer rotates along the outer periphery of the fulcrum shaft.

  According to the present invention, in the keyboard device, since the concave portion of the hammer and the upright surface provided in the keyboard chassis are in contact with each other to restrict the rotation operation of the hammer, the hammer stopper is separately provided on the chassis. There is no need to arrange them, and the manufacturing cost can be reduced.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 and 2 are cross-sectional views of a keyboard device 1 according to an embodiment of the present invention. FIG. 1 shows a state when the key 2 is released, and FIG. 2 shows a state when the key 2 is pressed. Yes.

  As shown in FIG. 1, the keyboard device 1 includes a synthetic resin keyboard chassis 3 and a synthetic resin key 2 attached to the keyboard chassis 3 so as to be pivotable up and down. Although only one key 2 is shown in FIG. 1, actually, a plurality of keys 2 are positioned in parallel.

  Thus, the key 2 includes a hammer 4 for adding weight, and a switch (not shown) that outputs a signal in response to a key pressing operation of each key. The key 2 is arranged at the uppermost part of the keyboard device 1, and a shaft (not shown) attached to the keyboard chassis 3 is inserted into the engagement hole 21 serving as a fulcrum of the keyboard, so that the engagement hole 21 is the center point. The keyboard chassis 3 is rotatably engaged. A hammer pressing member 23 is integrally formed at the lower part of the key 2, and the lower end thereof is disposed in contact with the tip of a hammer holder 6, which will be described in detail later. Further, the front end portion 22 of the key 2 is hollow inside, and a key guide 31 for preventing the key 2 from shaking is inserted.

  The keyboard chassis 3 is entirely made of a resin plate having a substantially uniform thickness, and is formed by injection molding. The above-described key guide 31 protrudes upward at a chassis front end portion 32 (right end portion in the drawing) of the keyboard chassis 3 shown in FIG. Further, a protrusion 8 is formed at the center of the keyboard chassis 3 toward the rotation support 7 which will be described in detail later, and a key support 33 to which the key 2 is attached is provided on the left side of the drawing. It has been.

  The protrusion 8 has a first rising surface 81 and a second rising surface 82 that rise toward the rotation support portion 7.

  The hammer 4 is composed of a hammer body 5 and a hammer holder 6. A hammer holder 6 is mounted on the hammer body 5 by a method described later, and is disposed on the rotation support portion 7. The hammer body 5 is made of metal, and the hammer holder 6 is formed of an elastomer (elastic resin). Details of the hammer body 5 and the hammer holder 6 will be described later.

  FIG. 3 is an enlarged view of a part of FIG. 1 and FIG. 4 is a part of FIG. The upper right end of the hammer holder 6 is disposed so as to contact the above-described hammer pressing member 23. A hammer holder 6 is mounted on the hammer body 5 by a method described later, and is disposed on the rotation support portion 7. The rotation support portion 7 includes a pedestal portion 72 on the upper surface of the first rising surface 81 and the second rising surface 82, a fulcrum shaft 71 provided on the upper portion of the pedestal portion 72, and the fulcrum protruding from the pedestal portion 72. The shaft 71 is fixed and a hammer hook 73 is provided so as to protrude above the hammer body 5.

  The fulcrum shaft 71 is attached so that the substantially central portion of the hammer holder 6 slides on the outer periphery thereof, and supports the rotation of the hammer 4 when the key 2 is pressed and released.

  The hammer body 5 and the hammer holder 6 will be described with reference to FIGS. FIG. 5 is a side view of the hammer body 5, and FIG. 6 is a plan view and a side view of the hammer holder 6.

  In FIG. 5, the hammer body 5 is composed of a cap mounting part 51, a shaft peripheral part 52, and a long part 53. A hook 54 is formed on the lower surface of the connecting portion between the shaft peripheral portion 52 and the long portion 53. The right end portion of the hammer holder 6 is attached to the cap attachment portion 51 by a method described later. In the lower portion of the shaft peripheral portion 52, a concave portion 57 composed of opposite sides 55 and 56 is formed, and the central portion of the hammer holder 6 is disposed in the concave portion 57. The left end of the hammer holder 6 is attached to the hook 54.

  The hammer holder 6 shown in FIG. 6 is made of an elastomer, and acts as a cushioning material when in contact with a metal, hard resin, or the like. The hammer holder 6 is formed with a cap portion 61 at the right end portion, a first contact portion 62, a hammer joint portion 63 and a second contact portion 64 are formed at the center portion, and a mounting through-hole 65 at the left end portion. Is provided.

  A hammer mounting hole 62 is formed in the cap portion 61 of the hammer holder 6. The cap mounting portion 51 of the hammer body 5 is inserted into the hammer mounting hole 62. The upper surface of the hammer joint portion 63 is joined to the concave portion 57 of the hammer body 5 described above, and the first contact portion 62 and the second contact portion 64 contact the sides 55 and 56 of the concave portion 57 of the hammer body 5, respectively. Installed in contact.

  A fulcrum shaft engaging portion 67 that engages with the fulcrum shaft 71 is provided on the lower surface of the hammer joint portion 63. Although not shown, a lubricant is applied to the engagement surface between the fulcrum shaft 71 and the fulcrum shaft engagement portion 67 so that the fulcrum shaft engagement portion 67 can smoothly rotate the outer periphery of the fulcrum shaft 71. Has been. The mounting hook 54 described above is mounted in the mounting through hole 65.

  Next, in the above configuration, the state at the time of key release will be described with reference to FIG. 1 and FIG. The lower end portion of the hammer pressing member 23 is in contact with the upper end portion of the cap portion 61 described above of the hammer holder 6. The hammer 4 is subjected to a stress that rotates counterclockwise around the fulcrum shaft engaging portion 67 engaged with the fulcrum shaft 71 due to the weight of the long portion 53 of the hammer body 5 described above. It is energized. Due to this stress, the hammer pressing member 23 is lifted counterclockwise. In this state, the second contact portion 64 of the hammer holder 6 is in contact with the first rising surface 81 of the protruding portion 8, and the rotation of the hammer 4 in the counterclockwise direction is restricted at this position. .

  In addition, since the hammer holder 6 is formed of an elastomer as described above, the hammer holder 6 acts as a cushioning material when contacting the first upright surface 81. Therefore, it is not necessary to arrange another part as a stopper for the hammer in the key release state.

  The state when the key is depressed will be described with reference to FIGS. When the key 2 is pressed in FIG. 1, the state shifts to the state shown in FIG. That is, in FIG. 4, the hammer pressing member 23 presses the upper end portion of the cap portion 61 described above of the hammer holder 6, and the fulcrum shaft engaging portion 67 of the hammer holder 6 rotates around the outer periphery of the fulcrum shaft 71. Rotates around the fulcrum shaft engaging portion 67 in the clockwise direction. The first abutting portion 62 of the hammer holder 6 abuts on the second rising surface 82 of the protruding portion 8, and the rotation operation of the hammer 4 in the clockwise direction is restricted. Further, since the hammer holder 6 is made of an elastomer, the hammer holder 6 acts as a cushioning material when coming into contact with the second rising surface 82. Therefore, it is not necessary to arrange another component as a stopper for the hammer when the key is depressed.

  As described above, the keyboard chassis is formed with a rising surface, and an elastomeric hammer holder attached to the recess of the hammer is in contact with the rising surface of the keyboard chassis so as to restrict the rotation of the hammer. It is not necessary to separately arrange a hammer stopper, and the manufacturing cost can be reduced. In addition, since the tip of the hammer holder is formed in a cap shape and attached to the tip of the hammer to cover it, it is possible to obtain a buffering action with the member that presses down the tip of the hammer. .

Sectional drawing at the time of key release of the keyboard apparatus in this invention. Sectional drawing at the time of key pressing of the keyboard apparatus in this invention. The enlarged view of the part centering on the rotation support part 7 of FIG. The enlarged view of the part centering on the rotation support part 7 of FIG. Explanatory drawing of the hammer main body 5. FIG. Explanatory drawing of the hammer holder 6. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Keyboard apparatus 2 Key 3 Keyboard chassis 4 Hammer 5 Hammer main body 6 Hammer holder 8 Protruding part 21 Keyboard fulcrum engagement hole 23 Hammer pressing member 31 Key guide 51 Cap mounting part 52 Shaft peripheral part 53 Long part 54 Hook 57 Recessed part 61 Cap Portion 62 First contact portion 64 Second contact portion 67 Support shaft engaging portion 71 Support shaft 81 First rising surface 82 Second rising surface

Claims (2)

Key and
A hammer body made of metal and an elastic member attached to the lower surface of the hammer body and having first and second contact portions, and a hammer interlocking with pressing and releasing of the key;
A keyboard device comprising: a keyboard chassis that supports the key and the hammer;
The keyboard chassis is formed with a protrusion having a first rising surface and a second rising surface,
The hammer body has a fulcrum portion formed above the protrusion, and a recess having sides facing the first rising surface and the second rising surface of the protrusion, respectively. And the first and second contact portions of the elastic member are attached to the sides of the recess,
The hammer body rotates with the fulcrum portion as a fulcrum as the key is pressed and released, and the first and second contact portions mounted on the sides of the recess are the first of the protrusions. A keyboard device, wherein the hammer is in contact with one rising surface and the second rising surface to restrict the rotation of the hammer. Wherein the upper protrusion fulcrum shaft is provided, the keyboard apparatus according to claim 1, fulcrum portion of the hammer characterized in that it rotates along the outer circumference of the fulcrum shaft.

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