JP6241823B2 - Clippers - Google Patents

Description

  The present invention relates to a clipper capable of adjusting a cutting height.

  According to one form of the conventional hair clipper, the cutting height of the hair clipper is changed by rotating the dial attached to the body. Patent Document 1 discloses an example of such a clipper.

  This hair clipper can cut hair by sliding a movable blade attached to the body in a short direction of the body with respect to a fixed blade attached to the body. Further, the cutting height can be changed by sliding the movable blade relative to the fixed blade in the longitudinal direction of the body.

  A guide groove having a spiral shape is formed in the dial. The dial and the movable blade are connected by a slide mechanism that slides the movable blade in the longitudinal direction of the body. The slide mechanism includes a link having a boss fitted in the guide groove. A first spring that presses the movable blade against the fixed blade and applies a force to the movable blade so that the movable blade moves toward the body is attached between the link and the movable blade. A second spring that applies force to the link is attached to the link so that the movable blade moves away from the body.

  As the dial rotates, the guide groove moves relative to the boss. For this reason, the boss and the link slide in the longitudinal direction of the body along the guide groove. As a result, the movable blade slides in the longitudinal direction of the body with respect to the fixed blade by the force from the link.

Japanese Patent No. 4046098

  According to the clipper of Patent Document 1, since the slider is pressed against the force of the first spring when the dial rotates counterclockwise, a large reaction force acts on the dial. On the other hand, when the dial is rotated clockwise, the slider is pushed in a direction in which the first spring is to be restored, so that the dial is rotated even if the force applied to the dial by the user is relatively small. Thus, according to the clipper of Patent Document 1, there is a large difference between the force applied to the dial when the dial is rotated counterclockwise and the force applied to the dial when the dial is rotated clockwise. For this reason, there is a possibility that a sense of incongruity may be felt when the force required for the operation varies greatly depending on the operation direction. In addition, since a large reaction force acts on the dial when the dial is rotated counterclockwise, the user may feel a burden when rotating the dial counterclockwise. In addition, although the clipper which changes cutting height by the guide groove which has a spiral shape was demonstrated, the same problem may arise also about the clipper which changes cutting height by the operation part which has the guide groove extended in the transversal direction of a body. .

  The objective of this invention is providing the clipper which a user can operate an operation part comfortably.

An independent form of the clipper includes a fixed blade, a movable blade that slides relative to the fixed blade, a body to which the fixed blade and the movable blade are attached, and a guide groove that is disposed in the body. An operating portion; a slider to which the movable blade is attached; and a slider that slides in a longitudinal direction and a short direction of the body with respect to the fixed blade; the movable blade is pressed against the fixed blade; and the slider A first spring that applies force to the slider so as to move toward the body; a link that has a boss inserted into the guide groove and that slides in the longitudinal direction of the body relative to the body; and the link a slide mechanism but having a second spring providing a force to the link to move to the body side, for securing the operating position of the operating unit And a holding mechanism having a plurality of fixed positions, said first spring, the boss forces to push said boss in one of the first and second sides along a direction in which the guide groove extends The second spring has a force for pushing the boss in a direction opposite to a direction in which the first spring pushes the boss, and the guide groove is operated by operating the operation portion. The relative position between the boss and the boss changes, the link moves in the longitudinal direction of the body due to the change in the relative position, and the movement of the link causes the slider and the movable blade to move relative to the fixed blade. The plurality of fixing positions are a first limit fixing position which is one limit of a relative position between the guide groove and the boss, and the guide groove and the boss. Other relative position with A second limit fixing position that is the limit of the guide groove and the relative position between the guide groove and the boss is set to one of the first limit fixing position and the second limit fixing position, The force applied from the second spring to the boss is greater than the force applied from the first spring to the boss, and the relative position between the guide groove and the boss is the first limit fixing position and When set to the other of the second limit fixing positions, a force applied from the first spring to the boss is larger than a force applied from the second spring to the boss, and the guide groove and the When the relative position to the boss is an intermediate position between the first limit fixing position and the second limit fixing position, the force applied from the first spring to the boss and the second spring Magnitude relationship with the force given to the boss Are configured to be interchanged.

  This clipper allows the user to operate the operation unit comfortably.

The front view of the clipper of an embodiment. The front view of the dial arrangement | positioning part of embodiment. The perspective view of the blade block of embodiment. The rear view of the dial of embodiment. The fragmentary sectional view of a clipper when the rotation position of the dial of an embodiment exists in the 1st limit fixed position. The perspective view of a dial and a blade block when the rotation position of the dial of an embodiment exists in the 1st limit fixed position. The fragmentary sectional view of a clipper when the rotation position of the dial of an embodiment exists in the 3rd middle fixed position. The perspective view of a dial and a blade block when the rotation position of the dial of embodiment is in a 3rd intermediate fixed position. The fragmentary sectional view of a clipper when the rotation position of the dial of an embodiment exists in the 2nd limit fixed position. The perspective view of a dial and a blade block when the rotation position of the dial of embodiment is in a 2nd limit fixed position. The action figure showing the relation between the boss and guide groove of an embodiment. The graph which shows the dial operation force of the clipper of embodiment, and the dial operation force of the clipper of a comparative example.

(An example of the form that this clipper can take)
[1] According to an independent embodiment of the clipper, a fixed blade, a movable blade that slides with respect to the fixed blade, a body to which the fixed blade and the movable blade are attached, and a guide disposed on the body. An operation part in which a groove is formed, the movable blade is attached, a slider that slides in a longitudinal direction and a short direction of the body with respect to the fixed blade, and the movable blade is pressed against the fixed blade, And a first spring that applies force to the slider so that the slider moves toward the body, and a boss that is inserted into the guide groove, and slides in the longitudinal direction of the body relative to the body. link, a slide mechanism for the link and a second spring providing a force to the link to move to the body side, the operation position of the operation portion And a holding mechanism having a plurality of fixed positions for the constant, the first spring pushes the boss to one of the first and second sides along a direction in which the guide groove extends A force is applied to the boss, and the second spring applies a force to push the boss in a direction opposite to a direction in which the first spring pushes the boss, and the operation unit is operated. Due to this, the relative position of the guide groove and the boss changes, the link moves in the longitudinal direction of the body due to the change in the relative position, and the movement of the link causes the slider and the movable blade to The plurality of fixed positions slides in the longitudinal direction of the body with respect to the fixed blade, and a first limit fixed position which is one limit of a relative position between the guide groove and the boss, and the guide Relative groove and boss Including a second limit fixing position which is the other limit of the first position, and the relative position between the guide groove and the boss is set to one of the first limit fixing position and the second limit fixing position. The force applied to the boss from the second spring is greater than the force applied to the boss from the first spring, and the relative position between the guide groove and the boss is the first position. When set to the other of the limit fixing position and the second limit fixing position, the force applied from the first spring to the boss is greater than the force applied from the second spring to the boss, When the relative position between the guide groove and the boss is an intermediate position between the first limit fixing position and the second limit fixing position, the force applied to the boss from the first spring and the first Force applied to the boss from two springs It is configured so that the magnitude relationship with is interchanged.

  According to this clipper, compared with the case where the magnitude relationship between the force applied from the first spring to the boss and the force applied from the second spring to the boss does not interchange, the user can The difference between the force applied to the operation unit when changing the general position from one to the other and the force applied to the operation unit when changing the relative position of the guide groove and the boss from the other to the other are reduced. For this reason, the user can operate the operation unit comfortably. For this reason, the possibility that the user may feel a burden when changing the relative position between the boss and the guide groove can be reduced. For this reason, a user's discomfort can be reduced.

  [2] According to one embodiment dependent on the clippers, the guide groove having a spiral shape is formed in the dial that is the operation portion, and the slide mechanism is formed in the body so as to be rotatable with respect to the body. A connection lever that is supported and has an arm and a shaft that contacts the link, and rotates with respect to the body according to the relationship between the force received from the slider and the force received from the link; According to the relationship between the force received from the first spring connected to the slider and the force received from the connecting lever, the arm being supported by the body so as to be able to rotate and contacting the arm of the connecting lever. By rotating with respect to the body, the slider and the movable blade slide with respect to the fixed blade in the longitudinal direction of the body. Further comprising a chromatography.

  According to this clipper, since the guide groove has a spiral shape, the amount of change of the slide of the movable blade relative to the fixed blade can be increased as compared with the case where the guide groove has a linear shape. For this reason, the variation | change_quantity of cutting height can be enlarged.

[3] According to an embodiment dependent on the clipper, the relative position between the guide groove and the boss is such that the force applied from the second spring to the boss is applied from the first spring to the boss. When the boss is set at a position larger than the applied force, the boss is on the first side surface which is a side surface on the opposite side of the slider of the first side surface and the second side surface. The relative position between the guide groove and the boss is set to a position where the force applied from the first spring to the boss is larger than the force applied from the second spring to the boss. The boss is pressed against the second side surface which is the side surface existing on the slider side of the first side surface and the second side surface.

  When the boss is positioned between the first side surface and the second side surface, the boss is easily moved between the first side surface and the second side surface due to vibration or the like. For this reason, the position in the longitudinal direction of the body with respect to the fixed blade of the movable blade may vary, and the cutting height may become unstable. According to this clipper, since the boss is pressed against the first side surface or the second side surface, the boss can be prevented from moving between the first side surface and the second side surface. For this reason, the cutting height can be stabilized.

[4] According to an embodiment dependent on the clippers, the holding mechanism has the plurality of fixing positions in which relative positions of the guide groove and the boss change stepwise, and the plurality of fixing position, before Symbol first further including one intermediate fixing positions or more intermediate fixed positions which exist between the limit fixed position and the second limit fixed position.

  [5] According to an embodiment dependent on the clippers, a process in which a relative position between the guide groove and the boss is changed to the one intermediate fixing position, or a relative position between the guide groove and the boss. A force applied from the first spring to the boss, and a force applied from the second spring to the boss in the process of changing the general position to any one of the plurality of intermediate fixed positions. The characteristics of the first spring and the characteristics of the second spring are set so that the magnitude relationship is reversed.

[6] According to one embodiment dependent on the clipper, the cutting height of the clipper is increased as the relative position between the guide groove and the boss moves from the second limit fixing position to the first limit fixing position. And the cutting height of the clipper decreases as the relative position between the guide groove and the boss moves from the first limit fixing position to the second limit fixing position. When the relative position to the boss is fixed at the first limit fixing position, the force applied from the second spring to the boss is greater than the force applied from the first spring to the boss. When the relative position between the guide groove and the boss is fixed at the second limit fixing position, the force applied from the first spring to the boss is increased from the second spring to the boss. Greater than the power given to There.

  [7] According to one embodiment depending on the clipper, substantially between the first side surface of the guide groove and the boss and between the second side surface of the guide groove and the boss. The width of the guide groove and the diameter of the boss are set so that no clearance is formed.

  When the force applied from the first spring to the boss and the force applied from the second spring to the boss are balanced, the boss is easily moved between the first side surface and the second side surface. For this reason, the position in the longitudinal direction of the body with respect to the fixed blade of the movable blade may vary, and the cutting height may become unstable. According to this clipper, since the clearance is not substantially formed between the boss and the first side surface and between the boss and the second side surface, the boss has the first side surface and the second side surface. It can suppress moving between. For this reason, the cutting height can be stabilized even when the force applied from the first spring to the boss and the force applied from the second spring to the boss are balanced.

[8] According to an embodiment dependent on the clippers, first support surfaces, which are flat surfaces against which the boss is pressed, are formed at a plurality of locations on the first side surface of the guide groove, and the guide groove and the boss When the relative position to the first support surface is fixed by the holding mechanism, the direction of the force applied to the first support surface by the boss is orthogonal to or approximately orthogonal to the first support surface. As described above, the first support surface is formed.

  When the first side surface against which the boss is pressed is inclined with respect to the direction of the force applied from the boss, the boss and the first side surface are likely to slip. For this reason, there exists a possibility that the relative position of a boss | hub and a guide groove may change. According to this clipper, since the direction of the force that the boss applies to the first support surface is orthogonal to the first support surface, the boss and the first support surface are unlikely to slip. For this reason, the relative position of the boss and the guide groove can be held at an appropriate position.

[9] According to an embodiment dependent on the clippers, a second support surface, which is a flat surface against which the boss is pressed, is formed at a plurality of locations on the second side surface of the guide groove, and the guide groove and the boss When the relative position of the boss is fixed by the holding mechanism, the direction of the force applied to the second support surface by the boss is orthogonal to or approximately orthogonal to the second support surface. As described above, the second support surface is formed.

  When the second side surface against which the boss is pressed is inclined with respect to the direction of the force applied from the boss, the boss and the second side surface are likely to slip. For this reason, there exists a possibility that the relative position of a boss | hub and a guide groove may change. According to this clipper, since the direction of the force that the boss applies to the second support surface is orthogonal to the second support surface, the boss and the second support surface are unlikely to slip. For this reason, the relative position of the boss and the guide groove can be held at an appropriate position.

(Embodiment 1)
The configuration of the clipper 1 will be described with reference to FIGS. 1 and 2.
As shown in FIG. 1, the clipper 1 includes a body 10, a blade block 20, a drive unit 30 (see FIG. 2), a cover 40, and a cutting height adjusting mechanism 50.

  The body 10 has a substantially cylindrical shape that can be gripped by the user, and is formed such that the axial direction is the longitudinal direction. A switch 11 is attached to the surface of the body 10. The switch 11 switches a connection state between a battery (not shown) and a motor (not shown) of the drive unit 30 disposed inside the body 10.

  As shown in FIG. 2, the body 10 has a blade block disposition portion 12 to which a blade block 20 (see FIG. 1) is detachably attached at the tip, and a dial 60 (see FIG. 1) in front of the outer periphery. A dial arrangement part 13 is provided. A holding spring 100 is fitted into the fixed portion 13 </ b> B of the dial placement portion 13. A hole 60 </ b> B (see FIG. 4) of the dial 60 is fitted into the support shaft 13 </ b> A of the dial placement portion 13.

  As shown in FIG. 1, the cover 40 is fixed to the body 10 so as to cover a part of the surface of the dial 60 in a state where the dial 60 is rotatably disposed on the body 10. For this reason, the cover 40 prevents the dial 60 from being detached from the body 10.

The configuration of the blade block 20 will be described with reference to FIG.
The blade block 20 includes a pair of blades composed of a fixed blade 21 and a movable blade 22, a support portion 23, a slider 24, a blade lever 26, and a first spring 27.

  The support portion 23 has a plate shape, and a plurality of convex portions 23A that are fitted into the plurality of concave portions 12A (see FIG. 2) of the blade block arrangement portion 12 (see FIG. 2) are formed near the outer periphery of the plate shape. . A fixed blade 21 is fixed to the distal end portion of the support portion 23.

The slider 24 is attached to the support portion 23 so as to be slidable in the longitudinal direction and the short direction of the body 10. A movable blade 22 is fixed to the tip of the slider 24.
The blade lever 26 is attached to the support portion 23 so as to be rotatable with respect to the support portion 23. The slider 24 and the blade lever 26 are connected by a first spring 27 that is a double torsion spring.

  The coil portion 27 </ b> A of the first spring 27 is attached to the accommodating portion 26 </ b> B of the blade lever 26, and both end portions 27 </ b> B are attached to a portion of the slider 24 opposite to the side in contact with the support portion 23. ing. As a result, the first spring 27 applies a force that presses against the fixed blade 21 and the support portion 23 and a force that moves the fixed blade 21 in the longitudinal direction of the body 10 to the movable blade 22 via the slider 24. Yes.

  The slider 24 is formed with a shaft groove 25 for fitting a shaft 31 (see FIG. 2) connected to a motor (not shown). The force by which the first spring 27 presses the movable blade 22 against the fixed blade 21 and the support portion 23 is smaller than the force by which the first spring 27 moves the movable blade 22 relative to the fixed blade 21 in the longitudinal direction of the body 10. . Therefore, when the shaft 31 (see FIG. 2) operates, the movable blade 22 slides in the short direction of the body 10 with respect to the fixed blade 21 while the movable blade 22 is pressed against the fixed blade 21. When the movable blade 22 and the fixed blade 21 slide relative to each other, the hair that has entered between the movable blade 22 and the fixed blade 21 is cut. As the motor, for example, a motor that moves the movable blade 22 in the short direction of the body 10 by rotating the shaft 31 eccentrically, or a linear motor that reciprocates the shaft 31 can be employed.

The cutting height adjusting mechanism 50 will be described with reference to FIGS.
As shown in FIG. 2, the cutting height adjusting mechanism 50 is attached to a dial 60 (see FIG. 4), a link 70 interlocking with the dial 60, a connecting lever 80 interlocking with the link 70, and the link 70. A second spring 90. The slider 24 (see FIG. 3), the blade lever 26 (see FIG. 3), the first spring 27 (see FIG. 3), the link 70, the connecting lever 80, and the second spring 90 constitute a slide mechanism. Has been.

  As shown in FIG. 4, the dial 60 has a disk shape. The back surface of the dial 60 is open, and a spiral guide groove 61 and a holding portion 66 protruding from the back surface on the opposite side of the guide groove 61 with respect to the center are formed. Further, as shown in FIG. 1, a scale 60 </ b> A indicating the cutting height is numerically described on the surface of the dial 60. The scale 60 </ b> A is arranged at a position where only the numerical value corresponding to the cutting height at that time is exposed from the window 41 of the cover 40.

  As shown in FIG. 4, a boss 71 formed at one end of a link 70 (see FIG. 2) is inserted into the guide groove 61. The guide groove 61 has a first side surface 62 on the inner peripheral side that is opposite to the slider 24 along the direction in which the guide groove 61 extends, and a second side surface 64 on the outer peripheral side on the slider 24 side. .

  Five first support surfaces 63 for pressing the boss 71 are formed on the first side surface 62. The five first support surfaces 63 have a planar shape and are orthogonal to a line extending in the radial direction from the center of the dial 60.

  Five second support surfaces 65 for pressing the boss 71 are formed on the second side surface 64. The five second support surfaces 65 have a planar shape and are orthogonal to a line extending in the radial direction from the center of the dial 60.

  The diameter of the boss 71 is set slightly smaller than the width of the guide groove 61. Therefore, substantially no clearance is formed between the boss 71 and the first side surface 62 and between the boss 71 and the second side surface 64.

  The holding portion 66 is formed along the circumferential direction, and a plurality of concave portions 66A are formed on the outer peripheral side. One of the plurality of recesses 66A is fitted with a top portion 101 of a mountain-shaped holding spring 100 fixed to the fixing portion 13B (see FIG. 2). When the top 101 of the holding spring 100 is fitted in the recess 66 </ b> A, the dial 60 is difficult to rotate due to the force of the holding spring 100. For this reason, the rotational position of the dial 60 is fixed. When a force is applied to the dial 60 and the dial 60 rotates, the holding spring 100 is deformed and is released from the recess 66A in which the top portion 101 is fitted. When the recessed portion 66A adjacent to the recessed portion 66A that has been fitted moves to a position facing the top portion 101, the top portion 101 fits into the recessed portion 66A. As described above, the relative position between the guide groove 61 and the boss 71, that is, the rotational position of the dial 60 has a plurality of fixed positions P due to the fitting between the recess 66A and the holding spring 100, and is stepwise. Change. The holding portion 66 and the holding spring 100 constitute a holding mechanism.

  The fixed position P is from a first limit fixed position PT1 that is a limit of the rotational position in the clockwise rotation direction of the dial 60 to a second limit fixed position PT2 that is a limit of the rotational position in the counterclockwise rotation direction. Vary between. The clockwise rotation direction of the dial 60 is a direction in which the cutting height of the clipper 1 is increased, and the counterclockwise rotation direction is a direction in which the cutting height of the clipper 1 is decreased.

There are three intermediate fixed positions PM between the first limit fixed position PT1 and the second limit fixed position PT2. The three intermediate fixed positions PM include a first intermediate fixed position PM1, a second intermediate fixed position PM2, and a third intermediate fixed position PM3 . The first intermediate fixed position PM1 is adjacent to the first limit fixed position PT1. The second intermediate fixed position PM2 is adjacent to the second limit fixed position PT2. The third intermediate fixed position PM3 is located between the first intermediate fixed position PM1 and the second intermediate fixed position PM2. Each fixed position P corresponds to the rotational position of the dial 60 in which the top 101 is fitted in one of the plurality of recesses 66A.

  As shown in FIG. 5, the other end of the link 70 is attached to a shaft 82 of a connecting lever 80 that is rotatably supported by the body 10. The link 70 slides in the longitudinal direction of the body 10 with respect to the body 10 when the boss 71 is guided by the guide groove 61. Further, a second spring 90 is attached to the other end of the link 70 to give a force on the side closer to the body 10 with respect to the link 70.

  The shaft 82 of the connecting lever 80 extends in the short direction of the body 10. Arms 81 are formed at both ends of the shaft 82. The arm 81 is in contact with the arm 26 </ b> A of the blade lever 26. The connecting lever 80 rotates relative to the body 10 when the link 70 slides relative to the body 10 in the longitudinal direction of the body 10. Specifically, the connecting lever 80 rotates relative to the body 10 according to the relationship between the force received from the slider 24 via the blade lever 26 and the force received from the link 70.

  When the fixed position P is at the first limit fixed position PT1, no force is applied to the blade lever 26 from the outside of the blade block 20. At this time, the rotation of the blade lever 26 is restricted by the rotation restricting portion 23 </ b> B of the support portion 23. At this time, the movable blade 22 is located closest to the body 10 side. At this time, the tip of the movable blade 22 and the tip of the fixed blade 21 are farthest from each other, and the hair cutting height is the highest. Note that the first limit fixing position PT1 is defined by the limit fixing position of the rotation of the connecting lever 80 when the connecting lever 80 contacts the body 10.

  When the fixed position P is at the second limit fixed position PT2, when force is applied to the blade lever 26 from the outside of the blade block 20, the rotation of the blade lever 26 increases. When the greatest force is applied, the movable blade 22 is located on the side farthest from the body 10. At this time, the tip of the movable blade 22 and the tip of the fixed blade 21 are closest to each other, and the hair cutting height is the lowest. The second limit fixing position PT2 is defined by the limit fixing position of the slide of the link 70 when the link 70 comes into contact with the body 10.

The operation of the cutting height adjusting mechanism 50 when the dial 60 rotates will be described with reference to FIGS.
As shown in FIG. 5, when the fixed position P is at the first limit fixed position PT1, the link 70 is located closest to the slider 24 as shown in FIG. At this time, the arm 81 of the connecting lever 80 is in contact with the arm 26 </ b> A of the blade lever 26. At this time, the movable blade 22 is located closest to the body 10 side. At this time, as shown in FIG. 5, the second spring 90 is most contracted. For this reason, the force given to the boss | hub 71 from the 2nd spring 90 becomes the largest.

  As shown in FIG. 7, when the dial 60 is operated counterclockwise and the fixing position P changes from the first limit fixing position PT1 side to the third intermediate fixing position PM3, as shown in FIG. The link 70 is pulled toward the body 10 against the force of the first spring 27. At this time, the shaft 82 of the connecting lever 80 is pulled toward the body 10, and the arm 81 pushes the arm 26 </ b> A of the blade lever 26 away from the body 10. Thereby, the movable blade 22 is pushed by the slider 24, and the movable blade 22 moves to the side farther from the body 10 than in the case of FIG. At this time, as shown in FIG. 7, the second spring 90 extends more than that shown in FIG. 5. For this reason, the force applied to the boss 71 from the second spring 90 is smaller than when the fixed position P is at the first limit fixed position PT1 and the first intermediate fixed position PM1.

  As shown in FIG. 9, when the dial 60 is operated counterclockwise and the fixing position P changes from the third intermediate fixing position PM3 side to the second limit fixing position PT2, as shown in FIG. The link 70 is pulled toward the body 10 against the force of the first spring 27. At this time, the shaft 82 of the connecting lever 80 is pulled toward the body 10, and the arm 81 pushes the arm 26 </ b> A of the blade lever 26 away from the body 10. Thereby, the movable blade 22 is pushed by the slider 24, and the movable blade 22 moves to the side farther from the body 10 than in the case of FIG. At this time, as shown in FIG. 9, the second spring 90 extends more than that shown in FIG. 7. For this reason, the force applied to the boss 71 from the second spring 90 is smaller than when the fixed position P is at the intermediate fixed position PM.

  When the dial 60 is operated clockwise to change the fixing position P from the second limit fixing position PT2 side to the third intermediate fixing position PM3, the link 70 is moved to the second spring 90 as shown in FIG. It moves to the side away from the body 10 against this force. At this time, the arm 81 is pushed away from the body 10 by the force of the first spring 27 through the arm 26A of the blade lever 26. Thereby, the movable blade 22 is pulled by the slider 24, and the movable blade 22 moves to the body 10 side as compared with the case of FIG.

  When the dial 60 is operated clockwise to change the fixing position P from the third intermediate fixing position PM3 side to the first limit fixing position PT1, the link 70 is moved to the second spring 90 as shown in FIG. It moves to the side away from the body 10 against this force. At this time, the arm 81 is pushed away from the body 10 by the force of the first spring 27 through the arm 26A of the blade lever 26. Thereby, the movable blade 22 is pulled by the slider 24, and the movable blade 22 moves to the body 10 side as compared with the case of FIG.

The relationship between the guide groove 61 and the boss 71 at each fixed position P will be described with reference to FIG.
When the fixing position P is at the first limit fixing position PT1, the force applied from the second spring 90 to the boss 71 exceeds the force applied from the first spring 27 to the boss 71, and the boss 71 is in the first position. Is pressed against the first support surface 63 corresponding to the limit fixing position PT1. At this time, the direction of the force that the boss 71 applies to the first support surface 63 is orthogonal to the first support surface 63.

When the fixed position P is at the first intermediate fixed position PM1, the force applied from the second spring 90 to the boss 71 exceeds the force applied from the first spring 27 to the boss 71, and the boss 71 is It is pressed against the first support surface 63 corresponding to the intermediate fixed position PM1. At this time, the direction of the force that the boss 71 applies to the first support surface 63 is orthogonal to the first support surface 63.

When the fixed position P is at the second limit fixed position PT2, the force applied from the first spring 27 to the boss 71 exceeds the force applied from the second spring 90 to the boss 71, and the boss 71 is in the second position. Is pressed against the second support surface 65 corresponding to the limit fixing position PT2. At this time, the direction of the force that the boss 71 applies to the second support surface 65 is orthogonal to the second support surface 65.

When the fixed position P is at the second intermediate fixed position PM2, the force applied from the first spring 27 to the boss 71 exceeds the force applied from the second spring 90 to the boss 71, and the boss 71 is in the second position. Is pressed against the second support surface 65 corresponding to the intermediate fixed position PM2. At this time, the direction of the force that the boss 71 applies to the second support surface 65 is orthogonal to the second support surface 65.

  When the fixed position P is at the third intermediate fixed position PM3, the force applied from the first spring 27 to the boss 71 is balanced with the force applied from the second spring 90 to the boss 71. That is, in the process of changing the fixed position P from the second intermediate fixed position PM2 to the first intermediate fixed position PM1, and in the process of changing from the first intermediate fixed position PM1 to the second intermediate fixed position PM2. The magnitude relationship between the force applied from the first spring 27 to the boss 71 and the force applied from the second spring 90 to the boss 71 is reversed.

The operation of the clipper 1 will be described with reference to FIG.
The broken line in FIG. 12 indicates the force (hereinafter, “dial operating force”) that causes the user to rotate the dial 60 in the clipper of the first comparative example that does not have the second spring 90. When the fixed position P is changed from the first limit fixed position PT1 to the second limit fixed position PT2 through the third intermediate fixed position PM3 as indicated by a broken line (marker of ◯) in FIG. The force shows a substantially constant high value. On the other hand, when the fixed position P is changed from the second limit fixing position PT2 to the first limit fixing position PT1 through the third intermediate fixing position PM3, as indicated by a broken line (marker of Δ) in FIG. The dial operating force shows a substantially constant low value.

  As described above, the dial operating force of the clipper of the first comparative example is the same as when the fixed position P is changed from the first limit fixed position PT1 to the second limit fixed position PT2 and when the second limit fixed position PT2. There is a large difference between the first limit fixing position PT1 and the first limit fixing position PT1. For this reason, it is easy to feel uncomfortable that the load when the user changes the fixed position P to the second limit fixed position PT2 is larger than the load when the user changes to the first limit fixed position PT1.

  The two-dot chain line in FIG. 12 shows the dial operation force in the clipper of the second comparative example in which the force applied from the second spring 90 to the boss 71 is always lower than the force applied from the first spring 27 to the boss 71. Yes. When changing the fixing position P from the first limit fixing position PT1 to the second limit fixing position PT2 through the third intermediate fixing position PM3, as indicated by a two-dot chain line (marker of ○) in FIG. The dial operating force slightly decreases toward the second limit fixing position PT2. On the other hand, as shown by a two-dot chain line (marker of Δ) in FIG. 12, the fixing position P is changed from the second limit fixing position PT2 to the first limit fixing position PT1 through the third intermediate fixing position PM3. When dialing power is slightly reduced. At this time, the fixed position P is always lower than when the first limit fixed position PT1 is changed to the second limit fixed position PT2 via the third intermediate fixed position PM3.

  In this way, the dial operating force of the clipper of the second comparative example is the same as when the fixed position P is changed from the first limit fixed position PT1 to the second limit fixed position PT2 side and the second limit fixed position PT2. There is a large difference between the first limit fixing position PT1 and the first limit fixing position PT1. For this reason, it is easy to feel uncomfortable that the load when the user changes the fixed position P to the second limit fixed position PT2 is larger than the load when the user changes to the first limit fixed position PT1.

  The solid line in FIG. 12 indicates the dial operating force of the clipper 1. When the fixed position P is changed from the first limit fixed position PT1 to the second limit fixed position PT2 through the third intermediate fixed position PM3 as shown by the solid line (circled marker) in FIG. The force decreases toward the second limit fixing position PT2. On the other hand, when the fixed position P is changed from the second limit fixing position PT2 to the first limit fixing position PT1 through the third intermediate fixing position PM3, as shown by the solid line (marker of Δ) in FIG. Dial operation force decreases. Then, at the third intermediate fixed position PM3, the solid line (◯ marker) and the solid line (Δ marker) in FIG. 12 intersect each other. In other words, the force applied from the first spring 27 to the boss 71 and the force applied from the second spring 90 to the boss 71 are balanced at the third intermediate fixed position PM3. Further, the increase amount of the solid line (◯ marker) in FIG. 12 is substantially equal to the increase amount of the solid line (Δ marker).

  Thus, when the fixing position P of the clipper 1 is changed from the first limit fixing position PT1 to the second limit fixing position PT2, the second limit fixing position PT2 is changed to the first limit fixing position PT1. The operating force when changing has a symmetrical shape on the graph. For this reason, compared with the first comparative example and the second comparative example, the clipper 1 is used when the user changes the fixed position P to the second limit fixed position PT2 side and the first limit fixed position PT1. It is difficult to remember that the load when rotating to one side is larger than the load when rotating to the other side.

  The dial operation force when changing the fixing position P of the clipper 1 from the first limit fixing position PT1 to the second limit fixing position PT2 is the same as that of the first comparative example and the second comparative example. Small against power. For this reason, when the fixing position P of the clipper 1 is changed from the first limit fixing position PT1 to the second limit fixing position PT2, it is possible to suppress the occurrence of a large reaction force on the dial 60.

The clipper 1 has the following effects.
(1) The clipper 1 includes a force applied from the first spring 27 to the boss 71 and a force applied from the second spring 90 to the boss 71 in accordance with a change in the relative position between the guide groove 61 and the boss 71. Large and small relationships are switched. For this reason, when the user changes the relative position of the guide groove 61 and the boss 71 from one to the other, the operating force of the dial 60 and the relative position of the guide groove 61 and the boss 71 from the other to one are changed. The difference from the operating force of the dial 60 when changing is reduced. For this reason, the user can operate the dial 60 comfortably. Further, it is possible to suppress a large reaction force from acting on the dial 60 by the force of the second spring 90. For this reason, a possibility that a user may feel a burden when rotating the dial 60 counterclockwise can be reduced. For this reason, a user's discomfort can be reduced.

  (2) Since the guide groove 61 has a spiral shape, the clipper 1 can increase the amount of slide change of the movable blade 22 relative to the fixed blade 21 as compared with the case where the guide groove 61 has a linear shape. For this reason, the variation | change_quantity of cutting height can be enlarged.

  (3) When the boss 71 is positioned between the first side face 62 and the second side face 64, the boss 71 is easily moved between the first side face 62 and the second side face 64 due to vibration or the like. . For this reason, the longitudinal position of the body 10 with respect to the fixed blade 21 of the movable blade 22 may fluctuate, and the cutting height may become unstable. Since the boss 71 is pressed against the first side surface 62 or the second side surface 64, the clipper 1 can suppress the boss 71 from moving between the first side surface 62 and the second side surface 64. . For this reason, the cutting height can be stabilized.

  Further, by setting the slide position in the longitudinal direction of the body 10 with respect to the fixed blade 21 of the movable blade 22 with reference to the first side surface 62 or the second side surface 64 against which the boss 71 is pressed, the cutting height is accurately set. Adjust well.

  (4) When the force applied from the first spring 27 to the boss 71 and the force applied from the second spring 90 to the boss 71 are balanced, the boss 71 is located between the first side surface 62 and the second side surface 64. It becomes easy to move with. For this reason, the longitudinal position of the body 10 with respect to the fixed blade 21 of the movable blade 22 may fluctuate, and the cutting height may become unstable. Since the clipper 1 does not substantially form a clearance between the boss 71 and the first side surface 62 and between the boss 71 and the second side surface 64, the boss 71 is connected to the first side surface 62. Movement between the second side surface 64 and the second side surface 64 can be suppressed. For this reason, even when the force applied to the boss 71 from the first spring 27 and the force applied to the boss 71 from the second spring 90 are balanced, the cutting height can be stabilized.

  (5) Since the direction of the force that the boss 71 applies to the first support surface 63 is perpendicular to the first support surface 63, the clipper 1 is less likely to slip between the boss 71 and the first support surface 63. . For this reason, the relative position of the boss 71 and the guide groove 61 can be held at an appropriate position.

  (6) Since the direction of the force that the boss 71 applies to the second support surface 65 is orthogonal to the second support surface 65, the clipper 1 is less likely to slip between the boss 71 and the second support surface 65. . For this reason, the relative position of the boss 71 and the guide groove 61 can be held at an appropriate position.

(Modification)
The specific form that this clipper can take is not limited to the form exemplified in the above embodiment. The hair clipper can take various forms different from the above-described embodiment as long as the object of the present invention is achieved. The modifications of the embodiment described below are examples of various forms that the clippers can take.

  The force applied from the first spring 27 to the boss 71 and the force applied from the second spring 90 to the boss 71 are the first intermediate fixed position PM1, the second intermediate fixed position PM2, or two adjacent to each other. It is also possible to balance between the two fixed positions P.

  The width of the guide groove 61 is substantially cleared between the boss 71 and the first side face 62 corresponding to the third intermediate fixing position PM3, and between the boss 71 and the second side face 64. Can also occur.

  The width of the guide groove 61 is substantially cleared between the boss 71 and the first side face 62 corresponding to the third intermediate fixing position PM3, and between the boss 71 and the second side face 64. Can be prevented, and other portions can be substantially cleared. Also in this case, the movement of the boss 71 is suppressed at the third intermediate fixed position PM3 in which the force applied from the first spring 27 to the boss 71 and the force applied from the second spring 90 to the boss 71 are balanced. Is done. For this reason, it can suppress that cutting height becomes unstable.

The first support surface 63 can be inclined with respect to the direction of the force acting from the boss 71.
The second support surface 65 can be inclined with respect to the direction of the force acting from the boss 71.

  The guide groove 61 can be changed to a linear or stepped groove that is inclined with respect to the lateral direction. In this case, instead of the dial 60, a slide type operation unit that slides in the direction in which the guide groove 61 extends can be employed. Moreover, it can replace with the dial 60 and the lever as an operation part can also be employ | adopted. When the lever connected to the link 70 moves in the direction in which the groove extends, the movable blade 22 changes in the longitudinal direction of the body 10 with respect to the fixed blade 21 via the slide mechanism, and the cutting height can be changed.

-When the dial 60 is rotated clockwise, the cutting height can be lowered, and when the dial 60 is turned counterclockwise, the cutting height can be increased.
1, 2 or 4 or more intermediate fixed positions PM can also be provided.

The intermediate fixed position PM can be omitted. In this case, the cutting height can be changed in two stages.
-The holding mechanism can be omitted.

  The blade lever 26 may be omitted, and the first spring 27 may be attached to the connecting lever 80. In short, any structure can be adopted as long as the movable blade 22 is moved in the longitudinal direction of the body 10 with respect to the fixed blade 21 by the movement of the link 70 in the longitudinal direction of the body 10.

  DESCRIPTION OF SYMBOLS 1 ... Hair clipper, 10 ... Body, 21 ... Fixed blade, 22 ... Movable blade, 24 ... Slider, 26 ... Blade lever, 26A ... Arm, 26B ... Shaft, 27 ... First spring, 60 ... Dial (operation part), DESCRIPTION OF SYMBOLS 61 ... Guide groove, 62 ... 1st side surface, 63 ... 1st support surface, 64 ... 2nd side surface, 65 ... 2nd support surface, 66 ... Holding part (holding mechanism), 70 ... Link, 71 ... Boss, 80 ... connecting lever, 81 ... arm, 82 ... shaft, 90 ... second spring, 100 ... holding spring (holding mechanism).

Claims (9)

A fixed blade,
A movable blade that slides relative to the fixed blade;
A body to which the fixed blade and the movable blade are attached;
An operating portion disposed in the body and having a guide groove formed thereon;
The movable blade is attached, a slider that slides in the longitudinal direction and the short direction of the body with respect to the fixed blade, the movable blade is pressed against the fixed blade, and the slider is disposed on the body side. A first spring that applies a force to the slider so as to move; a boss that is inserted into the guide groove; and a link that slides in a longitudinal direction of the body with respect to the body; a slide mechanism and a second spring providing a force to the link to move,
A holding mechanism having a plurality of fixed positions for fixing the operation position of the operation unit ,
The first spring applies a force to the boss to push the boss to one of a first side surface and a second side surface along a direction in which the guide groove extends,
The second spring gives the boss a force for pushing the boss in a direction opposite to a direction in which the first spring pushes the boss,
The relative position between the guide groove and the boss is changed by operating the operation portion, and the link is moved in the longitudinal direction of the body due to the change in the relative position. The slider and the movable blade slide in the longitudinal direction of the body with respect to the fixed blade;
The plurality of fixed positions are a first limit fixed position that is one limit of a relative position between the guide groove and the boss, and another limit of a relative position between the guide groove and the boss. A second limit fixed position which is
When the relative position between the guide groove and the boss is set to one of the first limit fixing position and the second limit fixing position, the force applied to the boss from the second spring is The relative position between the guide groove and the boss is greater than the force applied to the boss from the first spring, and the relative position between the guide groove and the boss is set to the other of the first limit fixing position and the second limit fixing position. The force applied to the boss from the first spring is greater than the force applied to the boss from the second spring, and the relative position between the guide groove and the boss is the first limit. At an intermediate position between the fixed position and the second limit fixed position , the magnitude relationship between the force applied from the first spring to the boss and the force applied from the second spring to the boss is switched. Configured to Barica N. The guide groove having a spiral shape is formed in the dial that is the operation unit,
The slide mechanism is
The shaft is supported by the body so as to be rotatable with respect to the body, and has an arm and a shaft that contacts the link, and the body receives the force from the slider and the force received from the link. A connecting lever that rotates
A force that is supported by the body so as to be able to rotate with respect to the body and that has an arm that contacts the arm of the connecting lever; the force received from the first spring connected to the slider; and the force received from the connecting lever by rotating relative to the body in accordance with the relationship, clippers according to claim 1, further comprising a blade lever the slider and the movable blade slides in the longitudinal direction of the body relative to the fixed blade. When the relative position between the guide groove and the boss is set to a position where the force applied from the second spring to the boss is larger than the force applied from the first spring to the boss. The boss is pressed against the first side surface which is the side surface of the first side surface and the second side surface opposite to the slider;
When the relative position between the guide groove and the boss is set to a position where the force applied from the first spring to the boss is larger than the force applied from the second spring to the boss. The hair clipper according to claim 1, wherein the boss is pressed against the second side surface, which is a side surface on the slider side of the first side surface and the second side surface. The holding mechanism has the plurality of fixed positions in which relative positions of the guide groove and the boss change stepwise ,
Said plurality of fixed positions, pre-Symbol first further including one intermediate fixing positions or more intermediate fixed positions which exists between the the limit fixed position second limit fixed position
Clippers according to any one of 請 Motomeko 1-3. A process in which the relative position between the guide groove and the boss is changed to the one intermediate fixing position, or the relative position between the guide groove and the boss is one of the plurality of intermediate fixing positions. Characteristics of the first spring so that the magnitude relationship between the force applied from the first spring to the boss and the force applied from the second spring to the boss is reversed. The clipper according to claim 4, wherein characteristics of the second spring are set. As the relative position between the guide groove and the boss moves from the second limit fixing position toward the first limit fixing position, the cutting height of the clipper increases, and the relative relationship between the guide groove and the boss increases. As the general position moves from the first limit fixing position to the second limit fixing position, the cutting height of the clipper decreases, and the relative position between the guide groove and the boss is the first limit. When fixed to a fixed position, the force applied to the boss from the second spring is greater than the force applied to the boss from the first spring, and the relative position between the guide groove and the boss when is secured to said second limit fixed position, either from the first force is the second spring given from spring to said boss of claims 1 to 5 greater than the force provided to the boss or Barika according to one Section N. The width of the guide groove and the width of the guide groove so that substantially no clearance is formed between the first side surface of the guide groove and the boss, and between the second side surface of the guide groove and the boss. The diameter of the boss | hub is set. The clipper as described in any one of Claims 1-6. A first support surface, which is a flat surface against which the boss is pressed, is formed at a plurality of locations on the first side surface of the guide groove;
When the relative position between the guide groove and the boss is fixed by the holding mechanism, the direction of the force applied by the boss to the first support surface is orthogonal to the first support surface. The clipper according to any one of claims 1 to 7 , wherein the first support surface is formed so as to be approximately orthogonal. A second support surface, which is a flat surface against which the boss is pressed, is formed at a plurality of locations on the second side surface of the guide groove;
When the relative position between the guide groove and the boss is fixed by the holding mechanism, the direction of the force applied by the boss to the second support surface is orthogonal to the second support surface. The clipper according to any one of claims 1 to 8 , wherein the second support surface is formed so as to be approximately orthogonal.