JP2009003102A - Keyboard apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a key applied to a keyboard apparatus with a mass body to be diverted to the keyboard apparatus with no mass body. <P>SOLUTION: An L-shape drooping setting part 24 which has a side view L shape comprised of a drooping part 25 vertically sunk down on the lower side and an extended part 26 extended backward from a lower end part of the drooping part 25 is provided from a key body part 23 of a key 20. The L-shape drooping setting part 24 has the same structure as the key in a keyboard apparatus with no hammer. A hammer HM is turnably arranged corresponding to each key 20, and a driven part 33 is provided at a front end of a stick part 31 of the hammer HM. The driven part 33 is crimped and fitted between an upper surface 26a of the extended part 26 of the L-shape drooping setting part 24 and an opposed lower surface 23a opposed to the upper surface 26a of the extended part 26 in the key body part 23. The driven part 33 normally engages between the key body part 23 and the extended part 26, and the key 20 and the hammer HM interlock to turn in a two-way direction of a turning back and forth direction. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a keyboard device having a mass body that gives inertia to a key.

  2. Description of the Related Art Conventionally, there are known keyboard devices that do not have a mass body that gives inertia to a key (for example, Patent Document 1 below) and those that have a mass body (for example, Patent Document 2 below). In the keyboard device, it is necessary to regulate the rotation start position corresponding to the non-key-pressed state of the rotating (swinging) key and the rotation end position corresponding to the key-pressed end state.

  For example, in the keyboard device of Patent Document 1 below, a hanging portion as a stopper piece is suspended downward from the key body portion of the key, and an extending portion is extended rearward from the lower end portion of the hanging portion. The part and the extended part are L-shaped hanging parts that exhibit an L-shape in side view as a whole. Further, the key frame is provided with a key upper limit stopper and a key lower limit stopper, and the extended portion of the L-shaped hanging portion comes into contact with the key upper limit stopper and the key lower limit stopper to start the rotation of the key. The position and the rotation end position are regulated respectively.

  On the other hand, in the keyboard device of Patent Document 2 below, the mass body provided corresponding to each key corresponds to the rotation start position and the key press end state corresponding to the non-key press state with the mass body rotation fulcrum as the center. It is possible to rotate between the rotation end position. Further, a hanging portion as an engaging piece hanging downward is suspended from the key body portion of the key, and the engaging portion which is the lower end portion of the hanging portion is always engaged with the engaged portion of the mass body. ing. As a result, when the key is pressed, the mass body rotates (swings) in conjunction with the key via the engagement between the engaging portion of the hanging part of the key and the engaged portion of the mass body. It has become.

In the keyboard device disclosed in Patent Document 2 below, the key frame is provided with a mass body upper limit stopper and a mass body lower limit stopper for the mass body. Then, the free end portion of the mass body comes into contact with the mass body lower limit stopper and the mass body upper limit stopper, so that the rotation start position and the rotation end of the corresponding key are controlled via the regulation of the rotation position of the mass body. Each position is regulated.
Japanese Patent No. 3082696 Japanese Patent No. 2929994

  However, the keyboard device of Patent Document 1 and the keyboard device of Patent Document 2 have different functions depending on the part that hangs down from the main body of the key. Therefore, the shape of the keyboard device is different and the keys are shared between the two keyboard devices. Was virtually impossible and had to be designed separately.

  The present invention has been made to solve the above-described problems of the prior art, and an object thereof is to make it possible to divert a key applied to a keyboard device having a mass body to a keyboard device having no mass body. An object of the present invention is to provide a keyboard device that can be used.

  In order to achieve the above object, a keyboard apparatus according to claim 1 of the present invention has a frame (10) and a key body portion (23), and is arranged in parallel to the frame, wherein the key body portion is A plurality of keys (20) which are rotatable between a rotation start position corresponding to a non-key-pressed state and a rotation end position corresponding to a key-pressed end state; It has a drooping portion (25) that hangs downward from the main body, and an extending portion (26) that extends from the lower end portion of the lower suspending portion in either the front or rear direction, and exhibits an L shape in side view. An L-shaped hanging portion (24) having a portion, and a portion fixed to the key body portion, and located above the extending portion of the L-shaped hanging portion, There are opposed extension parts facing parts (23a, 25aa) and a driven part (33) driven by the key, corresponding to the key It is arranged in the frame and is rotatable between the rotation start position corresponding to the non-key-pressed state and the rotation end position corresponding to the key-press end state around the mass body rotation fulcrum (30). A plurality of mass bodies (HM), and the driven portion of the mass body is sandwiched and fitted between the extension portion of the L-shaped hanging portion and the extension portion facing portion, The key and the mass body are rotated from the respective rotation end positions through the engagement of the extension portion of the key and the extension portion facing portion with the driven portion of the mass body. It is configured to rotate in both directions in conjunction with the movement end position.

  Preferably, the upper surface (33a) and the lower surface (33b) of the driven part are formed in a convex arc shape in a side view (Claim 2).

  In order to achieve the above object, a keyboard device according to claim 3 of the present invention has a frame and a key body, and is arranged in parallel with the frame, and the key body corresponds to a non-key-pressed state. A plurality of keys that are rotatable between a rotation start position to be rotated and a rotation end position corresponding to a key-pressed end state, and a hanging portion that is provided on each key and hangs downward from the key body portion (25), and an L-shaped hanging portion (24) having an extending portion (26) extending in the front-rear direction from the lower end portion of the hanging portion and having a portion that is L-shaped in a side view. ) And a driven portion (40, 50) driven by the key, and disposed on the frame corresponding to the key, and a rotation corresponding to a non-key-pressed state with a mass body rotation fulcrum as a center. A plurality of mass bodies (HM2) that are rotatable between a movement start position and a rotation end position corresponding to the key-press end state. The driven portion of the mass body has an upper engagement portion (42) and a lower engagement portion (43), and the L-shape is provided between the upper engagement portion and the lower engagement portion. The extended portion of the hanging portion is sandwiched and fitted from above and below, and through the engagement between the extended portion of the key and the upper engaging portion and the lower engaging portion of the mass body, the The key and the mass body are configured to rotate in a bidirectional manner from each rotation end position to the rotation end position.

  Preferably, when the mass body is in the rotation start position, the upper engagement portion of the driven portion is positioned closer to the mass body rotation fulcrum in the front-rear direction than the lower engagement portion. (Claim 4).

  Preferably, it is a portion of the mass body on the opposite side of the upper engagement portion and the lower engagement portion of the driven portion, and an upper surface (26a) and a lower surface of the extension portion of the key, respectively. (26c) is provided with convex portions (44, 45) having a convex curved surface shape when viewed from the side.

  Preferably, an interval (H5) between the convex portion of the upper engaging portion and the convex portion of the lower engaging portion in a direction perpendicular to both the key arrangement direction and the extending direction of the extending portion. ) Is constant during the entire rotation of the mass body (claim 6).

  Preferably, the convex portion of the upper engaging portion and the convex portion of the lower engaging portion are formed in shapes that are always in contact with the upper surface and the lower surface of the extended portion of the key, respectively. Item 7).

  Preferably, the driven part of the mass body is provided with a position restricting part (34a, 35a, 41a) that abuts the corresponding key and restricts the position of the key in the key arrangement direction with respect to the key in the entire rotation process. (Claim 8).

  In addition, the code | symbol in the said parenthesis is an illustration.

  According to claim 1 of the present invention, a key applied to a keyboard device having a mass body can be diverted to a keyboard device having no mass body.

  According to the second aspect of the present invention, it is possible to reduce the change in the gap between the extended portion of the key and the extended portion facing portion and the driven portion of the mass body in the key rotation process, thereby suppressing the mechanical noise and rotating the mass body. The accuracy can be improved.

  According to claim 3 of the present invention, a key applied to a keyboard apparatus having a mass body can be diverted to a keyboard apparatus not having a mass body.

  According to the fourth aspect, the front and rear length of the extended portion can be short, and the degree of freedom in design can be increased.

  According to the fifth aspect, the change in the gap between the key extension portion and the driven portion of the mass body in the key rotation process is reduced, thereby suppressing the mechanical noise and improving the accuracy of the mass body rotation. Can do.

  According to the sixth aspect of the present invention, the mechanical noise can be further reduced by minimizing the change in the gap between the key extension portion and the upper and lower engagement portions of the driven portion of the mass body in the key rotation stroke. And the accuracy of rotation of the mass body can be improved.

  According to the seventh aspect of the present invention, the key extending portion and the driven portion of the mass body are always in contact with each other both in the upper and lower directions in the entire reciprocating rotation process, so that the mechanical noise can be suppressed and the mass body can be rotated more accurately. Can be aimed at.

  According to the eighth aspect, it is possible to always prevent the misalignment of the key and the driven part in the key arrangement direction, and to prevent the mutual disengagement in the key arrangement direction.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
FIGS. 1A and 1B are schematic cross-sectional views of a keyboard device according to the first embodiment of the present invention. FIG. 4A shows a non-key-pressed state, and FIG. 4B shows a key-pressed end state. This keyboard device is applied to, for example, an electronic keyboard instrument.

  The frame 10 individually supports a plurality of keys 20 and hammer bodies HM corresponding to the keys 20 arranged in parallel. The key 20 includes a white key and a black key, but in the figure, only one white key and one hammer body HM corresponding thereto are shown as representatives. Hereinafter, the player side (the left side in FIG. 1A) of this apparatus is referred to as “front”.

  The key 20 has a key body 23 connected to a base end 21 via a hinge 22 and is integrally formed of resin. The key 20 may be individualized, but is configured in a unit type in which a plurality of keys (for example, one octave) are connected at a common base end as in the keyboard device of Patent Document 1 described above. Alternatively, the key unit may be stacked in two or three layers at a common base end.

  A base end portion 21 of the key 20 is fixed to a rear upper portion of the frame 10 by a fastener or the like (not shown), and the key body 23 of the key 20 is vertically moved via a hinge portion 22 (perpendicular to the arrangement direction of the keys 20). (Within a plane) can be freely rotated (oscillated). An upper limit hammer stopper 12 and a lower limit hammer stopper 11 made of felt or the like are provided at an upper part and a lower part of the rear part of the frame 10, respectively.

  From the key body 23, an L-shaped hanging portion 24 having an L shape in side view is provided. The outer surface of the L-shaped hanging portion 24 in the key arrangement direction (left-right direction) is flush with the outer surface of the key body portion 23. The L-shaped hanging portion 24 includes a hanging portion 25 that hangs straight down from the key body portion 23 in a non-key-pressed state, and an extension that extends horizontally rearward from the lower end portion of the hanging portion 25 in a non-key-pressed state. Part 26. The shape of the L-shaped hanging portion 24 is the same as the stopper piece provided on the key of the keyboard device (FIG. 8 of Patent Document 1) that does not have the hammer body (or mass body) as in Patent Document 1 above. is there. Other white keys have the same configuration as the key 20. Also for the black key, the configuration of the L-shaped hanging portion is the same as that of the key 20.

  The hammer body HM, which is a mass body, is disposed below each key 20. The hammer body HM includes a rod-shaped portion 31, a driven portion 33 made of hard resin or the like provided at the front end portion of the rod-shaped portion 31, and a mass concentration provided at the free end portion 31 a that is the rear end portion of the rod-shaped portion 31. Part 32. In the middle part in the front-rear direction of the frame 10, a hammer body rotation shaft 30 is provided for each hammer body HM. Each hammer body HM is freely rotatable (oscillated) in the vertical direction about the corresponding hammer body rotation shaft 30. The configuration of each hammer body HM is the same.

  Fig.2 (a) is sectional drawing which follows the AA line of Fig.1 (a). FIGS. 2B to 2D show modifications, which will be described later.

  The driven portion 33 of the hammer body HM is fitted between the key body portion 23 and the extending portion 26 and is always engaged, and the key 20 and the hammer body HM are rotated in the forward and backward directions. It is designed to rotate in conjunction with both directions.

  That is, the driven portion 33 of the hammer body HM has a side view and a saddle shape (see FIG. 1), and the upper surface 33a and the lower surface 33b are formed in a convex arcuate surface in the side view. The portion 31 is formed in an arc shape along the same circle around the point P0 in the longitudinal direction. The driven portion 33 is sandwiched and fitted between the upper surface 26 a of the extending portion 26 of the L-shaped hanging portion 24 and the opposing lower surface 23 a of the key body portion 23 facing the upper surface 26 a of the extending portion 26. (See FIGS. 1A, 1B, and 2A).

  The distance between the upper surface 33a and the lower surface 33b in the vertical direction passing through the point P0 is the same as the vertical width of the extending portion 26. As shown in FIG. 1, since the upper surface 33a and the lower surface 33b are arc-shaped as described above, the contact point Pa between the upper surface 33a and the opposing lower surface 23a and the contact point Pb between the lower surface 33b and the upper surface 26a are always present. In the middle, the point P0 is located. Therefore, in the entire rotation stroke of the key 20 from the non-key-pressed state to the key-pressed end state, the upper surface 33a and the opposed lower surface 23a, and the lower surface 33b and the upper surface 26a are always in contact (sliding contact) with no gap. .

  In response to the key pressing operation by the player, the driven portion 33 is driven by the key main body portion 23 of the key 20, and the hammer body HM is counterclockwise (corresponding to the key pressing direction) of FIG. By rotating in the direction of movement), an appropriate inertia is imparted and a good key pressing feeling is obtained. When the hammer body HM rotates in the forward direction, the free end portion 31a eventually comes into contact with the upper limit hammer stopper 12 and the rotation ends. As a result, the rotation of the key 20 in the forward direction (key pressing direction) is also completed.

  The hammer body HM is always urged clockwise by the weight of the mass concentrating part 32 (direction corresponding to the key release direction). Therefore, when the key 20 is released, the hammer body HM is rotated in the clockwise direction in FIG. 1, the key body 23 is driven by the driven portion 33, and the key 20 is rotated in the key release direction (reverse direction). Move. Eventually, the mass concentration portion 32 of the free end portion 31a of the hammer body HM comes into contact with the lower limit hammer stopper 11, and the rotation of the key 20 in the backward direction together with the hammer body HM is completed. The key 20 obtains the return force in the backward direction also by the elasticity of the hinge portion 22, but the return force due to the weight of the hammer body HM is mainly used.

  Therefore, the lower limit hammer stopper 11 and the upper limit hammer stopper 12 restrict the rotation start position corresponding to the non-key-pressed state and the rotation end position corresponding to the key-pressed end state of the key 20 and the hammer body HM, respectively. Note that a return spring may be provided as auxiliary means for generating a return force for returning the hammer body HM to the non-key pressing position.

  FIGS. 3A and 3B are schematic side views showing an example in which the key 20 according to the present embodiment is applied to a keyboard device of a type that does not have a hammer body HM. FIG. 4A shows a non-key-pressed state, and FIG. 4B shows a key-pressed end state.

  In this example, a key upper limit stopper 13 made of felt or the like is attached to the lower portion of the horizontal portion 10a of the frame 10 between the key body portion 23 and the extending portion 26 of the L-shaped hanging portion 24 by sticking or the like. While fixing (refer FIG. 3A), the lower limit stopper 14 for keys is fixed to the upper part of the bottom part 10b of the flame | frame 10 (refer FIG.3B). Similarly to the keyboard apparatus shown in FIG. 8 of the above-mentioned Patent Document 1, the extension portion 26 of the key 20 abuts against the upper limit stopper 13 for keys and the lower limit stopper 14 for keys, so that the key 20 is not pressed. The rotation start position corresponding to the state and the rotation end position corresponding to the key pressing end state are respectively regulated. Thus, the key 20 can be applied to both a keyboard device having the hammer body HM and a keyboard device not having the hammer body HM.

  According to the present embodiment, the L-shaped hanging portion 24 of the key 20 has the same configuration as that of a key in a keyboard device that does not have a hammer body, and the L-shaped hanging portion 24, the key body portion 23, Since the driven portion 33 is sandwiched and fitted between the keys, the key 20 of the keyboard device having the hammer body can be diverted to the keyboard device having no hammer body. Thereby, the key 20 can be shared between both types of keyboard apparatuses, and the number of parts can be reduced.

  Further, since the upper surface 33a and the lower surface 33b of the driven portion 33 of the hammer body HM are convex arcuate surfaces, the gaps between the upper surface 33a and the opposing lower surface 23a and the clearances between the lower surface 33b and the upper surface 26a are locked. The change in 20 rotation strokes can be reduced. In addition, since the distance between the upper surface 33a and the lower surface 33b in the vertical direction is the same as the vertical width of the extending portion 26, the above-described gap does not always occur, and the driven portion 33 is an L-shaped vertical portion. 24 and the key body 23 are always engaged. As a result, the mechanical noise can be suppressed without rattling during the key release operation. In addition, the accuracy of rotation of the hammer body HM accompanying the operation of the key 20 can be improved, and the followability during high-speed performance can be improved.

  In the present embodiment, the portion of the key 20 that is in sliding contact with the driven portion 33 is, as shown in FIG. 2A, the lower surface of the side wall (opposing lower surface 23 a) and the extending portion of the key body portion 23. In FIG. 26, it is the upper surface (upper surface 26a) of the side wall, but is not limited thereto. For example, the configuration shown in FIG. FIG. 2B is a cross-sectional view corresponding to FIG. That is, instead of the opposed lower surface 23a, the lower surface 23aa of the portion having a step with respect to the side wall of the key main body 23 may be used. Moreover, it may replace with the upper surface 26a, and the upper surface 26aa of the part which has a level | step difference with respect to the side wall of the extension part 26 may be sufficient.

  2C is a side view showing a modified example of the driven portion 33, and FIG. 2D is a cross-sectional view taken along line BB in FIG. 2C. In this modification, the position restricting portions 34 and 35 are provided integrally or separately on the upper and lower portions of the driven portion 33. As shown in FIG. 2D, the position restricting portion 34 is fitted to the key body portion 23 so that the left and right contact portions 34 a of the position restricting portion 34 are in sliding contact with the inner side surface 23 b of the key body portion 23. It has become. Further, the position restricting portion 35 is fitted to the extending portion 26, and the contact portions 35 a on both the left and right sides of the position restricting portion 35 are in sliding contact with the inner side surface 26 b of the extending portion 26.

  In the entire rotation of the key 20 and the hammer body HM, the contact portions 34a and 35a are in sliding contact with the inner side surfaces 23b and 26b, so that the driven portion 33 is prevented from being displaced with respect to the key 20 in the key arrangement direction. In addition, from the viewpoint of simplifying the configuration, either one of the position restriction units 34 and 35 may be eliminated. Moreover, what is shown in FIG. 2D as a portion where the key 20 and the driven portion 33 are in sliding contact with each other for preventing the deviation is an example, and may be configured to be in sliding contact with another portion.

  In the present embodiment, the free end portion 31a of the hammer body HM extends rearward from the hammer body rotation shaft 30, and the free end portion 31a rises as the key is pressed (FIG. 1A). ) And (b)), and is not limited to this combination. For example, you may employ | adopt the modification as shown to Fig.4 (a), (b).

  That is, as shown in FIG. 4A, the L-shaped hanging portion 24 of the key 20 has a shape in which the extending portion 26 extends from the lower end portion of the hanging portion 25 to the front rather than the rear. On the other hand, with respect to the hammer body HM, the driven portion 33 that engages with the L-shaped hanging portion 24 is located on the rear side of the hammer body rotation shaft 30, and the free end portion 31 a is in front of the hammer body rotation shaft 30. Extend to. The lower limit hammer stopper 11 is disposed at the front portion of the frame 10. An upper limit hammer stopper 18 is provided on the upper portion of the mouth bar portion 17 provided at the front portion of the frame 10. The rotation start position of the hammer body HM is regulated by the free end portion 31 a coming into contact with the lower limit hammer stopper 11. On the other hand, the rotation end position of the hammer body HM is regulated by the free end 31a rising and contacting the upper limit hammer stopper 18. A cushioning material may be provided above the free end portion 31a.

  Alternatively, as shown in FIG. 4B, the extending direction of the extending portion 26 in the L-shaped extending portion 24 is the same as that in the example of FIG. 1, but for the hammer body HM from the rear, The moving shaft 30, the driven portion 33, and the free end portion 31a are arranged in this order. In addition, the free end 31a is lowered as the key is depressed. In this example, a hammer stopper 15 corresponding to the upper limit hammer stopper 12 (see FIG. 1) is disposed at the front portion of the frame 10. Further, a hammer stopper 19 made of a rod-like body corresponding to the lower limit hammer stopper 11 (see FIG. 1) is fixed to the frame 10. The rotation start position of the hammer body HM is regulated by the free end portion 31 a coming into contact with the hammer stopper 19. A cushioning material may be provided above the free end portion 31a. On the other hand, the rotation end position of the hammer body HM is regulated by the free end portion 31a descending and coming into contact with the hammer stopper 15. In order to protect the key 20 when the key is strongly pressed, a stopper 16 that contacts the lower end of the L-shaped hanging portion 24 may be provided on the frame 10 as shown in FIG. The stopper 16 can also be applied to the example of FIG. 1 and the example of FIG.

  In the present embodiment, the L-shaped hanging portion 24 is integrated with the key body portion 23, but may be a separate body. The L-shaped hanging portion 24 only needs to have an L-shaped portion, and is connected to the hanging portion 25 and the key body portion 23 as illustrated in FIGS. 4 (a) and 4 (b). The shape may include the upper portion 25a. Further, the portion that is in sliding contact with the upper surface 33 a of the driven portion 33 is not limited to the lower surface (opposing lower surface 23 a) of the side wall of the key main body portion 23, and is fixed to the key main body portion 23. What is necessary is just a part which opposes the upper surface 26a. For example, it may be a part of the L-shaped hanging portion 24 (the lower surface 25aa of the upper portion 25a) as illustrated in FIGS. 4 (a) and 4 (b).

  FIGS. 5 (a) and 5 (b) show a non-key-pressing example in which the key 20 in the modification shown in FIGS. 4 (a) and 4 (b) is applied to a keyboard device having no hammer body HM. It is a typical side view of a state. In these examples, the key upper limit stopper 13 is fixed to the lower portion of the horizontal portion 10a of the frame 10 and the upper portion of the bottom portion 10b of the frame 10 in the same manner as described with reference to FIGS. The key lower limit stopper 14 is fixed. Similar to the key 20 shown in FIG. 1, the key 20 shown in FIGS. 4A and 4B can be applied to both a keyboard device having the hammer body HM and a keyboard device not having the hammer body HM.

(Second Embodiment)
6 (a) and 6 (b) are schematic cross-sectional views of a keyboard device according to the second embodiment of the present invention. FIG. 4A shows a non-key-pressed state, and FIG. 4B shows a key-pressed end state. However, since the configurations of the frame 10, the lower limit hammer stopper 11 and the upper limit hammer stopper 12 are the same as those in the first embodiment, illustration is omitted, and only the key 20 and the hammer body HM2 are shown. FIG.6 (c) is sectional drawing which follows the CC line | wire of Fig.6 (a).

  In the second embodiment, the configuration of the key 20 is the same as that of the first embodiment (see FIG. 1), and the configuration of the L-shaped hanging portion 24 is also the same. Therefore, it can also be used for a keyboard device without a hammer body. The hammer body HM2 is different from the hammer body HM in the first embodiment only in that a driven part 40 is provided instead of the driven part 33, and the configuration of other parts is the same.

  As shown in FIG. 6C, the driven portion 40 is configured by connecting an upper engaging portion 42 and a lower engaging portion 43 with a connecting portion 41. These are integrally formed of a hard resin or the like, but may be formed separately and then fixed. Between the upper engaging portion 42 and the lower engaging portion 43, the extending portion 26 of the L-shaped hanging portion 24 is sandwiched and fitted from above and below.

  The driven portion 40 of the hammer body HM2 is always engaged with the extending portion 26 so that the key 20 and the hammer body HM2 rotate in conjunction with both the forward and backward rotation directions. . That is, when the key 20 rotates in the forward direction, the lower engagement portion 43 is driven by the lower surface 26c of the extending portion 26, so that the hammer body HM rotates in the forward direction in conjunction with it. On the other hand, when the key 20 is released, the lower engagement portion 43 drives the lower surface 26c of the extending portion 26, and the key 20 rotates in the key releasing direction. The upper engaging portion 42 may be slightly separated from the upper surface 26a of the extending portion 26 in the middle of the rotation stroke, but the lower engaging portion 43 and the extending portion 26 may be separated in the entire rotation stroke. It plays a role of preventing the lower surface 26c from being separated too much.

  The left and right end surfaces of the connecting portion 41 of the driven portion 40 have contact portions 41a and function as position restricting portions. That is, the connecting portion 41 is fitted to both the left and right walls of the extending portion 26 so that the left and right contact portions 41 a are in sliding contact with the inner side surface 26 b of the extending portion 26. In the entire rotation of the key 20 and the hammer body HM2, the contact portion 41a is in sliding contact with the inner side surface 26b, so that the displacement of the driven portion 40 with respect to the key 20 in the key arrangement direction is always prevented, and the key arrangement direction. The disengagement of each other is prevented.

  Further, as shown in FIG. 6A, in the non-key-pressed state, the upper engagement portion 42 of the driven portion 40 is located closer to the hammer body rotation shaft 30 than the lower engagement portion 43. Yes. The effect of such an arrangement will be described with reference to FIG.

  FIG. 7A is a side view of the driven portion 40 when the distance between the upper engaging portion 42 and the lower engaging portion 43 in the non-key-pressed state with respect to the hammer body rotating shaft 30 is set to be the same. FIG. 7B is a side view of the driven unit 40 having the configuration shown in FIGS. 6A and 6B, which is adopted in the present embodiment. In FIGS. 4A and 4B, the positions of the rotational displacement of the driven portion 40 relative to the L-shaped hanging portion 24 in the non-key-pressed state and the key-pressed-end state are indicated by a solid line and a double-dotted line, respectively. It is shown. In these drawings, the extending portion 26 may be regarded as being horizontal and the rotational position of the driven portion 40 may be grasped.

  In the forward stroke by pressing the key, the driven unit 40 rotates counterclockwise in FIG. 6 about the hammer body rotation shaft 30, so that the driven unit 40 itself is also relative to the L-shaped hanging unit 24. Therefore, it is rotationally displaced by an angle determined relatively counterclockwise. The distance between the front end position and the rear end position of the driven part 40 from the non-key-pressed state to the key-pressed end state with respect to the extended portion 26 is L1 in the example of FIG. 7A and FIG. In the example of (b), it becomes L2. However, the rotation angle is slightly exaggerated. Here, L1> L2 is established. This is because the range in the front-rear direction of the extending portion 26 with which the upper engaging portion 42 or the lower engaging portion 43 contacts is shifted back and forth in the example of FIG. 7A, but in FIG. This is because there is almost no overlap in the example.

  Therefore, assuming that the configuration of FIG. 7A is adopted, the engagement with the upper engagement portion 42 or the lower engagement portion 43 is made as compared with the configuration of FIG. 7B in the present embodiment. In order to ensure, the length in the front-rear direction that should be secured at the minimum in the extending portion 26 becomes long. Therefore, in the configuration of the present embodiment (FIG. 7B), the length of the extending portion 26 can be short, the degree of design freedom can be increased, and the range of the keyboard device that can be used for the key 20 It is easy to spread.

  Further, consider the interval between the upper engagement portion 42 and the lower engagement portion 43 in the vertical direction, strictly speaking, in the direction perpendicular to both the arrangement direction of the keys 20 and the extension direction of the extension portion 26. This interval changes from H1 to H2 in the example of FIG. 7A, and from H3 to H4 in the example of FIG. Here, the interval H3 is substantially equal to the interval H4, and the interval H2 is clearly smaller than the interval H1. In the example of FIG. 7B as well, it is once larger than the interval H3 in the middle of the rotation stroke, but no great difference as much as the difference between the interval H2 and the interval H1 occurs. Therefore, since the change in the distance between the upper engaging portion 42 and the lower engaging portion 43 sandwiching the extending portion 26 from above and below is smaller in the example of FIG. There is little rattling between the upper engaging portion 42 and the lower engaging portion 43, and the engaged state between the driven portion 40 and the extending portion 26 is smoother.

  According to the present embodiment, the L-shaped hanging portion 24 of the key 20 is sandwiched and fitted between the upper engaging portion 42 and the lower engaging portion 43 of the driven portion 40 of the hammer body HM2. Therefore, the same effects as those of the first embodiment can be obtained with respect to diverting the key 20 to a keyboard device that does not have a hammer body.

  Further, since the upper engagement portion 42 of the driven portion 40 is positioned closer to the hammer body rotation shaft 30 than the lower engagement portion 43 in the non-key-pressed state, the extended portion of the L-shaped hanging portion 24 The front-rear length of 26 can be short, and the degree of freedom in design can be increased. Further, rattling between the driven portion 40 and the extended portion 26 can be suppressed to be small, and the engagement can be made smooth.

  Further, since the contact portion 41a of the driven portion 40 is in sliding contact with the inner side surface 26b of the extending portion 26 (see FIG. 6C), the positional deviation of the driven portion 40 with respect to the key 20 in the key arrangement direction is always prevented. Thus, the same effects as in the examples of FIGS. 2C and 2D can be achieved with respect to preventing the mutual disengagement.

  Here, consider the superiority of this embodiment over the first embodiment. In the first embodiment, in order to make it possible to use the key 20 for a keyboard device without a hammer body, it is possible to avoid interference with the key upper limit stopper 13 (see FIG. 3A) and the like during key depression. Therefore, it is necessary to ensure a large distance between the extending portion 26 of the L-shaped hanging portion 24 and the key body portion 23. For this reason, the driven portion 33 of the hammer body HM is also enlarged in the vertical direction, leading to an increase in weight of the hammer body HM.

  Furthermore, if the position of the hammer body rotation shaft 30 is the same between the first and second embodiments, the difference in the front-rear direction of the trajectory between the L-shaped hanging part 24 and the driven part in the front-rear direction will be described. Is larger in the driven part 33 in the first embodiment than in the driven part 40 in the second embodiment. Therefore, there is a disadvantage that the front and rear lengths of the extending portions 26 necessary for securing the engagement are more required in the first embodiment.

  Therefore, the second embodiment is more advantageous than the first embodiment in terms of reducing the weight of the hammer body HM and improving the degree of freedom in designing the extending portion 26.

  In the second embodiment, the driven portion 40 and the extending portion 26 are somewhat rattling in the rotation stroke, but the modification shown in FIG. It is desirable to suppress rattling.

  8A to 8C are schematic side views showing modifications of the driven unit 40. FIG. FIG. 4A shows a non-key-pressed state, FIG. 4B shows a state during the key-pressing process, and FIG. The rotational angles of the driven part 40 and the L-shaped hanging part 24 are slightly exaggerated.

  In this modified example, convex portions 44 and 45 having convex curved surfaces when viewed from the side are provided on the opposing portions of the upper engaging portion 42 and the lower engaging portion 43 of the driven portion 40, respectively. 6 differs from the example of FIG. 6 in other configurations.

  Even by providing a convex curved surface-shaped convex portion, the change in the gap between the extending portion 26 and the upper engaging portion 42 and the lower engaging portion 43 in the rotation stroke of the hammer body HM2 is reduced. However, the protrusions 44 and 45 are also formed in such a shape as to always contact the upper surface 26a and the lower surface 26c of the extended portion 26 in the entire rotation process of the hammer body HM2. That is, the interval H5 between the convex portions 44 and 45 in the extending direction of the drooping portion 25 (the direction perpendicular to both the arrangement direction of the keys 20 and the extending direction of the extending portion 26) is the rotation of the hammer body HM2. Constant throughout the process. Thereby, rattling between the driven part 40 and the extended part 26 can be minimized in the entire rotation process.

  According to the modification shown in FIG. 8, as in the first embodiment, it is possible to reliably suppress the mechanical noise and improve the accuracy of the rotation of the hammer body HM2, and to improve the follow-up performance at high-speed performance. Can do.

  Also in the second embodiment, the displacement direction of the free end portion 31a of the hammer body HM2 due to the key pressing operation and the longitudinal direction of the hammer body rotation shaft 30, the driven portion 40, and the free end portion 31a. The arrangement shown in FIGS. 4A and 4B can be applied to the arrangement order. In addition, the shape of the L-shaped hanging portion 24 may be a shape including the upper portion 25a as shown in FIGS. 4 (a) and 4 (b).

  In the first embodiment, from the viewpoint of simplifying the configuration without placing importance on the high-speed continuous hit performance, as shown in FIG. 9A, the driven portion 33 of the hammer body HM is a key body portion. It is good also as a structure driven only by the lower surface of 23 side walls.

  In the second embodiment, the configuration is complicated, but instead of the driven portion 40 of the hammer body HM2, a scissors-like scissors are formed at the front portion of the hammer body HM in the same manner as in Patent Document 2. It is good also as a structure which provides the to-be-driven part 50 provided with the engaging parts 51 and 52 (refer FIG.9 (b)). In this configuration, the hammer part HM rotates in conjunction with the key 20 by always engaging the drive part 27 having an arcuate surface provided in the extending part 26 of the key 20 and the engaging parts 51 and 52. Configured as follows.

  In the first and second embodiments, the key main body portion 23 of the key 20 is rotatable via the hinge portion 22, but is not limited thereto. For example, similarly to the above-described Patent Document 2, a configuration in which the key is rotatable around a key fulcrum provided in the frame 10 without providing a hinge portion may be used.

FIG. 3 is a schematic cross-sectional view of the keyboard device according to the first embodiment of the present invention in a non-key-pressed state (FIG. (A)) and a key-pressed end state (FIG. (B)). 1A is a cross-sectional view taken along the line A-A in FIG. 1A (FIG. 1A), a cross-sectional view illustrating a modified example of the key (FIG. 2B), and a side view illustrating a modified example of the driven portion. )), And a cross-sectional view taken along line BB in FIG. FIG. 3 is a schematic side view of a key in a non-key-pressed state (FIG. (A)) and a key-pressed end state (FIG. (B)) showing an example in which the key is applied to a keyboard device that does not have a hammer body. . It is typical sectional drawing which shows the L-shaped hanging part of a key, and the modification of a hammer body. FIG. 4A is a schematic side view of a key in a non-key-pressed state, showing an example in which the key in the modification shown in FIGS. 4A and 4B is applied to a keyboard device that does not have a hammer body. ), (B)). FIG. 6 is a schematic cross-sectional view of the keyboard device according to the second embodiment of the present invention in a non-key-pressed state (FIG. (A)) and a key-pressed end state (FIG. (B)), C- in FIG. It is sectional drawing which follows a C line (figure (c)). FIG. 6A is a side view of the driven portion when the distance between the upper engagement portion and the lower engagement portion in the non-key-pressed state is set to be the same with respect to the hammer body rotation axis. It is a side view (figure (b)) of the driven part of composition shown in b). It is a typical side view showing a non-key-pressed state (figure (a)), a keystroke process middle state (figure (b)), and a key-press end state (figure (c)) of a driven part of a modification. It is a typical side view (a figure (a) and (b)) showing a modification of a key and a hammer object in a 1st and 2nd embodiment.

Explanation of symbols

  10 frames, 20 keys, 23 key body, 23a facing lower surface (extending portion facing portion), 24 L-shaped hanging portion, 25 hanging portion, 25aa lower surface (extending portion facing portion), 26 extending portion, 26a upper surface 26c Lower surface, 30 Hammer body rotating shaft (mass body rotating fulcrum), 33, 40, 50 Driven portion, 33a Upper surface, 33b Lower surface, 34a, 35a, 41a Abutting portion (position regulating portion), 42 Upper engagement Joint part, 43 Lower engaging part, 44, 45 Convex part, H5 interval, HM, HM2 Hammer body (mass body)

Claims (8)

Frame,
A key body portion disposed in parallel with the frame, wherein the key body portion is located between a rotation start position corresponding to a non-key-pressed state and a rotation end position corresponding to a key-press end state. A plurality of rotatable keys,
L-shaped in side view, provided on each key, having a hanging portion that hangs downward from the key body portion, and an extending portion that extends in the front-rear direction from the lower end portion of the lower hanging portion An L-shaped hanging portion having a portion exhibiting a shape;
An extension portion facing portion that is fixed to the key body portion and is located above the extension portion of the L-shaped hanging portion and faces the extension portion;
A rotation start position and a key press end state corresponding to a non-key press state centered on a mass body rotation fulcrum having a driven part driven by the key and disposed on the frame corresponding to the key A plurality of mass bodies that are rotatable between the rotation end positions corresponding to
The driven portion of the mass body is sandwiched and fitted between the extended portion of the L-shaped hanging portion and the extended portion facing portion,
The key and the mass body are rotated from the respective rotation end positions through the engagement of the extension portion of the key and the extension portion facing portion with the driven portion of the mass body. A keyboard device characterized in that it is configured to rotate in both directions to a movement end position.   The keyboard device according to claim 1, wherein an upper surface and a lower surface of the driven portion are formed in a convex arc shape in a side view. Frame,
A key body portion disposed in parallel with the frame, wherein the key body portion is located between a rotation start position corresponding to a non-key-pressed state and a rotation end position corresponding to a key-press end state. A plurality of rotatable keys,
L-shaped in side view, provided on each key, having a hanging portion that hangs downward from the key body portion, and an extending portion that extends in the front-rear direction from the lower end portion of the hanging portion An L-shaped hanging portion having a portion exhibiting
A rotation start position and a key press end state corresponding to a non-key press state centered on a mass body rotation fulcrum having a driven part driven by the key and disposed on the frame corresponding to the key A plurality of mass bodies that are rotatable between the rotation end positions corresponding to
The driven portion of the mass body has an upper engaging portion and a lower engaging portion, and the extended portion of the L-shaped hanging portion is between the upper engaging portion and the lower engaging portion. Is inserted and fitted from above and below,
Through the engagement of the extension part of the key with the upper engagement part and the lower engagement part of the mass body, the key and the mass body are moved from the respective rotation end positions to the A keyboard device that is configured to rotate in a bidirectional manner to a rotation end position.   When the mass body is at the rotation start position, the upper engagement portion of the driven portion is positioned closer to the mass body rotation fulcrum in the front-rear direction than the lower engagement portion. 4. The keyboard device according to claim 3, wherein   A portion of the mass body on the opposite side of the upper engagement portion and the lower engagement portion of the driven portion, which are in contact with the upper surface and the lower surface of the extension portion of the key, respectively, The keyboard device according to claim 4, further comprising a convex portion having a convex curved shape in a side view.   An interval between the convex portion of the upper engaging portion and the convex portion of the lower engaging portion in a direction perpendicular to both the key arranging direction and the extending direction of the extending portion is the mass body. 6. The keyboard device according to claim 5, wherein the keyboard device is constant over the entire rotation stroke.   The convex portion of the upper engaging portion and the convex portion of the lower engaging portion are each formed in a shape that is always in contact with the upper surface and the lower surface of the extension portion of the key. The keyboard device according to claim 5 or 6.   2. A position restricting portion for restricting a position of a key arrangement direction with respect to the key in the entire rotation stroke is provided on the driven portion of the mass body, and the position restricting portion restricts the position in the key arranging direction with respect to the key. 8. The keyboard device according to any one of items 7.

Images