JP2015194738A - keyboard instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an action mechanism of keyboard instrument superior in assembling workability and productivity resulting in cost reduction.SOLUTION: The keyboard instrument includes: plural transmission members 10 each of which is rotatable in a vertical direction accompanying press-key operation of plural keys 2 arranged in parallel to each other: plural hammer members 11 each of which rotates in a vertical direction accompanying respective rotational operation of the plural transmission members 10 to give an action load to each of the plural keys 2; and a transmission holding member 12 having plural transmission holding parts each of which rotatably holds each of the plural transmission members 10 which are integrally formed in an array direction of the keys 2. Accordingly, the plural transmission holding parts can be easily installed at a time only by installing the transmission holding member 12 without needing to independently manufacture and assemble the plural transmission holding parts.

Description

  The present invention relates to a keyboard instrument such as a piano.

  For example, in the action mechanism of a keyboard instrument, as described in Patent Document 1, a pen that is rotated by a key pressing operation, a jack that is driven according to the rotation of the pen, and a jack that is driven by the jack. And a hammer member that strikes a string, and these are provided corresponding to each of a plurality of keys.

JP 2002-258835 A

  Such an action mechanism of a keyboard instrument includes a wiper rail and a hammer rail that are beamed across the entire length in the arrangement direction of a plurality of keys. A plurality of uipen holders are attached to the wipen rail corresponding to each of the plurality of keys, and a plurality of uipens are rotatably attached to these uipen holders by pins.

  In addition, a plurality of hammer holding portions are attached to the hammer rails corresponding to the plurality of wipers, and each of the shanks of the plurality of hammer members is rotatably attached to the hammer holding portions by pins. Yes.

  In such an action mechanism of a keyboard instrument, since the uipen must be individually attached to the wipen holder using pins, when attaching a plurality of uipens to the uipen rail, a plurality of uipen holders are provided according to the installation procedure of the plurality of uipens. Must be attached individually to the Wipenrail in order. For this reason, there are problems that the assembling work is troublesome, the productivity is poor, and the cost cannot be reduced.

  Further, in this keyboard instrument action mechanism, the hammer member must be individually attached to the hammer holding portion by means of a pin. Therefore, when attaching a plurality of hammer members to the hammer rail, a plurality of hammer members are attached according to the attachment procedure of the plurality of hammer members. The hammer holders must be attached to the hammer rail in turn. For this reason, there are problems that the assembling work is troublesome, the productivity is poor, and the cost cannot be reduced.

  Furthermore, in recent years, in order to give a more realistic key touch feeling to an electronic keyboard instrument that generates a string-sounding sound by a hammer member using an electronic sound source circuit, such a keyboard instrument action mechanism is applied. Proposals have been made.

  In a normal electronic keyboard instrument, in order to detect key depression and release, or velocity at the time of key depression, a switch part is provided at the bottom of each key. If this happens, new problems will arise.

  That is, the switch part provided in each of these keys is a part to which the most mechanical load is applied by the key operation, and there are many failures. For this reason, frequent repairs and replacements are required. Conventionally, repair and replacement can be performed relatively easily such as removing the key. However, when such an action mechanism is provided, the repair and replacement work is not easy.

  Furthermore, in recent years, in order to give a more realistic key touch feeling to an electronic keyboard instrument that generates a string-sounding sound by a hammer member using an electronic sound source circuit, such a keyboard instrument action mechanism is applied. Proposals have been made. Further, in this case, it has been proposed to use a lighter and more productive material such as a resin instead of a normal casting for a support member called a bracket for supporting the hammer member and the wiper pen.

  However, the bracket plays a role of supporting the entire action mechanism, and the bracket made of a material such as resin is insufficient in strength as compared with the conventional cast bracket.

  Furthermore, since the support member such as a bracket is supported by a plurality of long rails, sufficient strength can be maintained even if the support member is made of a lightweight and highly productive material such as resin.

  The problem to be solved by the present invention is to provide a keyboard instrument that is good in assembling workability, workability and productivity of repair / replacement, and can be reduced in cost.

  The present invention includes a plurality of keys, a plurality of transmission members that rotate in the vertical direction in response to a key pressing operation of the plurality of keys, and a vertical rotation in accordance with each rotational operation of the plurality of transmission members. A plurality of hammer members for applying an action load to each of the plurality of keys, and a plurality of transmission holding portions for rotatably holding the plurality of transmission members, which are integrally formed along the arrangement direction of the keys. And a holding member.

Further, the present invention provides a plurality of keys, a plurality of transmission members that rotate in the vertical direction in response to a key pressing operation of the plurality of keys, and a vertical direction in accordance with each rotational operation of the plurality of transmission members. A plurality of hammer members that rotate and apply an action load to each of the plurality of keys, and a plurality of hammer holding portions that hold the plurality of hammer members rotatably are integrally formed along the arrangement direction of the keys. And a hammer holding member.

The present invention also provides a plurality of keys, a plurality of transmission members that are provided corresponding to the plurality of keys, and rotate upward in response to a key pressing operation on the corresponding keys, and the plurality of keys. A hammer member that applies an action weight to the corresponding key by rotating upward in response to an upward rotation operation of the transmission member corresponding to the key; A keyboard instrument having a plurality of switch portions that are provided corresponding to each of the hammer members and generate an on signal for generating a musical sound by being pressed in response to the rotation of the hammer member. .

Furthermore, the present invention provides a plurality of keys arranged on a base member provided in a musical instrument case, and the base in a state where the keys are respectively positioned at a plurality of predetermined positions in the overall length in the arrangement direction of the plurality of keys. A plurality of support members that are erected on the member, a plurality of transmission members that are provided corresponding to the plurality of keys and that rotate upward in response to a key pressing operation on the corresponding key; A transmission member support rail that has a length over the entire length of the plurality of keys in the arrangement direction and is attached to each of the plurality of support members, and the plurality of transmission holding members are attached along the arrangement direction of the plurality of keys; An action weight is applied to the corresponding key by rotating upward in response to an upward rotation operation of the transmission member provided corresponding to each of the plurality of keys and corresponding to the key. A hammer member to be applied and a length that extends over the entire length of the plurality of keys in the arrangement direction, and is attached to each of the plurality of support members, and the plurality of hammer holding members are attached along the arrangement direction of the plurality of keys. Hammer support rails and a plurality of switch portions that are provided corresponding to the plurality of hammer members and generate an on signal for generating a musical sound by being pressed in response to the rotation of the hammer members. And a keyboard instrument.

  According to the present invention, there is no need to separately manufacture and assemble a plurality of transmission holding portions that respectively hold the plurality of transmission members rotatably before attaching the plurality of transmission members to the transmission holding member. A plurality of transmission holding portions can be easily installed at a time simply by installing members. For this reason, since the assembly work can be easily performed, the productivity is good and the cost can be reduced.

  In addition, according to the present invention, before attaching the plurality of hammer members to the hammer holding member, it is not necessary to separately manufacture and assemble a plurality of hammer holding portions that respectively hold the plurality of hammer members rotatably, By simply installing the hammer holding member, it is possible to easily install a plurality of hammer holding portions at a time. For this reason, since the assembly work can be easily performed, the productivity is good and the cost can be reduced.

Further, since the switch portion requiring the most repair / replacement is provided not in the lower part of the key but in the vicinity of the hammer member, the work of repair / replacement of the switch portion becomes very easy.
Furthermore, since the support member such as a bracket is supported by a plurality of long rails, sufficient strength can be maintained even if the support member is made of a lightweight and highly productive material such as resin.

It is the top view which showed the keyboard apparatus in one Embodiment which applied this invention to the electronic keyboard musical instrument. It is an enlarged side view in the AA arrow of the keyboard apparatus shown by FIG. FIG. 3 is an enlarged side view showing a state in which transmission support rails and hammer support rails are arranged on a plurality of support members over the entire length in the key arrangement direction in the keyboard device shown in FIG. 2. FIG. 4 is an enlarged perspective view showing a support member shown in FIG. 3. FIG. 2 shows a part of the transmission holding member and the transmission member shown in FIG. 2, (a) is an enlarged plan view thereof, and (b) is an enlarged sectional view taken along the line BB. The transmission holding member and the transmission member shown in FIG. 2 are shown, (a) is an enlarged side view thereof, and (b) is an enlarged bottom view of the transmission member. 2 shows a process of attaching a transmission member to the transmission holding member shown in FIG. 2, (a) is an enlarged side view showing a state in which the transmission holding member is raised above the transmission member, and (b) is a transmission It is the expanded side view which showed the state which attached the holding member to the transmission member, rotated clockwise, and has arrange | positioned on the upper side of the key. FIG. 2 shows a part of the hammer holding member and the hammer member shown in FIG. 2, (a) is an enlarged plan view thereof, and (b) is an enlarged sectional view taken along the CC arrow thereof. It is the expanded side view which showed the hammer holding member and hammer member which were shown by Fig.8 (a). 2 shows a step of attaching the hammer member to the hammer holding member shown in FIG. 2, wherein (a) is an enlarged side view showing a state in which the hammer holding member is raised above the hammer member, and (b) is a hammer. It is the expanded side view which showed the state which attached the holding member to the hammer member, rotated counterclockwise, and has arrange | positioned on the upper side of the transmission member. The 1st modification of the transmission fitting part of the transmission member in the action mechanism of this invention and the transmission holding shaft of a transmission holding member is shown, (a) shows the state at the time of fitting a transmission fitting part to a transmission holding shaft. The enlarged side view of the principal part shown, (b) is an enlarged side view of the principal part showing a state in which the transmission fitting portion is fitted to the transmission holding shaft and rotated clockwise. The 2nd modification of the hammer fitting part of the hammer member in the action mechanism of this invention and the hammer holding shaft of a hammer holding member is shown, (a) shows the state at the time of fitting a hammer fitting part to a hammer holding shaft. The enlarged side view of the principal part shown, (b) is an enlarged side view of the principal part showing a state where the hammer fitting part is fitted to the hammer holding shaft and rotated counterclockwise. In the keyboard apparatus of this invention, it is the top view which showed the 3rd modification which each divided | segmented the transmission support rail and the hammer support rail into plurality.

Hereinafter, an embodiment in which the present invention is applied to an electronic keyboard instrument will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the electronic keyboard instrument includes a keyboard device 1. The keyboard device 1 is incorporated in a musical instrument case (not shown). The keyboard device 1 includes a plurality of keys 2 arranged in parallel, and an action mechanism 3 that applies an action load to each key 2 in response to a key pressing operation of the plurality of keys 2.

  As shown in FIGS. 1 and 2, each of the plurality of keys 2 includes a white key 2a and a black key 2b. For example, 88 white keys 2a and black keys 2b are arranged in parallel. The plurality of keys 2 are supported so that their intermediate portions in the front-rear direction (left-right direction in FIG. 2) are rotatable in the vertical direction by the balance pins 4a, 4b, respectively, and are arranged in parallel on the base member 5 in this state. ing.

  In this case, on the base member 5, as shown in FIG. 2, cushion materials 6a and 6b with which the lower surfaces of the front end portions (right end portions in FIG. 2) of the plurality of keys 2 come into contact with each other are separable. 2 along the direction of arrangement. Further, on the base member 5, a cushion material 7 is provided along the arrangement direction of the keys 2 so that the lower surfaces of the rear end portions (left end portions in FIG. 2) of the plurality of keys 2 come into contact with each other. It has been. Furthermore, on the base member 5, guide pins 8a and 8b are provided to stand upright to prevent the plurality of keys 2 from swinging in the direction of arrangement.

  As shown in FIG. 1 and FIG. 2, the action mechanism 3 includes a plurality of transmission members 10 that rotate in the vertical direction in response to a key pressing operation of the plurality of keys 2, and each of the plurality of transmission members 10 rotates. Accordingly, a plurality of hammer members 11 that rotate in the vertical direction and apply an action load to each of the plurality of keys 2 are provided.

  In addition, as shown in FIG. 2, the action mechanism 3 includes a transmission holding member in which a plurality of transmission holding portions 13 that hold the plurality of transmission members 10 in a rotatable manner are integrally formed along the arrangement direction of the keys 2. 12 and a hammer holding member 14 in which a plurality of hammer holding portions 15 that hold the plurality of hammer members 11 rotatably are integrally formed along the arrangement direction of the keys 2.

  In this case, the transmission holding member 12 is mounted on a transmission support rail 17 arranged along the arrangement direction of the keys 2 as shown in FIGS. 2 and 3. The hammer holding member 14 is mounted on a hammer support rail 18 arranged along the arrangement direction of the keys 2. The transmission support rail 17 and the hammer support rail 18 are supported by a plurality of support members 20 and are disposed above the plurality of keys 2.

  As shown in FIGS. 1 to 4, the plurality of support members 20 are erected and mounted on the base member 5 in a state where the plurality of support members 20 are positioned at a plurality of predetermined positions in the entire length in the arrangement direction of the keys 2. . In this case, for example, a total of 88 keys 2 are arranged. In response to this, the plurality of support members 20 are arranged at both ends in the arrangement direction of the plurality of keys 2 and between, for example, the three keys 2 positioned for each of the 20 keys 2. . In other words, in this embodiment, the support members 20 are arranged at five positions in the entire length in the arrangement direction of the keys 2.

  The support member 20 is made of a hard synthetic resin such as ABS resin, and as shown in FIGS. 3 and 4, an attachment portion 20 a attached to the base member 5 and an integrally formed portion on the attachment portion 20 a. And a bridge portion 20b. Accordingly, the support member 20 is configured to be disposed between the rear portions of the plurality of keys 2 in a state where the bridge portion 20b protrudes above the key 2 by attaching the attachment portion 20a onto the base member 5. Has been.

  In this case, a rear rail support for supporting the transmission support rail 17 is provided on the rear end lower portion of the bridge portion 20b, that is, on the rear upper portion (left upper portion in FIG. 3), as shown in FIGS. A portion 20c is provided. In addition, a front rail support portion 20d that supports the hammer support rail 18 is provided at the front upper portion (the upper right portion in FIG. 3) of the bridge portion 20b. Furthermore, a stopper rail support portion 20e is provided on the rear upper portion (left upper portion in FIG. 3) of the bridge portion 20b, and a substrate rail support portion 20f is provided on the upper portion of the bridge portion 20b.

  The transmission support rail 17 is made of, for example, a metal such as a steel plate or aluminum, and has a rectangular cross section formed in a rectangular shape as shown in FIGS. 2 and 3. Is formed. The transmission support rail 17 is configured such that a predetermined portion in the arrangement direction of the keys 2 is attached on each rear rail support portion 20 c of the plurality of support members 20.

  As shown in FIGS. 2 and 3, a plurality of transmission holding members 12 and a plurality of stopper support portions 21 are attached on the transmission support rail 17 along the arrangement direction of the keys 2. In this case, the plurality of stopper support portions 21 are made of metal plates, and are provided at five locations on the transmission support rails 17 corresponding to the plurality of support members 10 and above the plurality of transmission holding members 12 as shown in FIG. It is attached in a protruding state.

  The transmission holding member 12 is made of a hard synthetic resin such as ABS resin. As shown in FIGS. 5A and 5B, the transmission holding member 13 has, for example, about 10 transmission holding parts 13 on the main body plate 12a. It is integrally formed along the arrangement direction of the keys 2 in a state in which each key 2 is held. The transmission holding portion 13 includes a shaft support portion 22 to which the transmission member 10 is rotatably attached and prevents side-contact of the transmission member 10, and a regulation portion 23 that regulates side-contact of the transmission member 10 during packaging transportation. doing.

  In this case, as shown in FIGS. 3 and 5, the shaft support portion 22 is formed corresponding to each key 2 at the rear end portion (left end portion in FIG. 3) on the main body plate 12 a of the transmission holding member 12. A pair of guide walls 22a and a transmission holding shaft 24 formed between the pair of guide walls 22a are provided. The pair of guide walls 22a constitutes a guide portion that rotatably guides the transmission fitting portion 26 of the transmission member 10 with a transmission fitting portion 26 (described later) of the transmission member 10 slidably sandwiched from both sides. ing.

  As shown in FIGS. 3 and 5, the restricting portion 23 is a pair of restricting walls formed on the front portion (the right side portion in FIG. 3) of the main body plate 12 a of the transmission holding member 12 so as to correspond to each transmitting member 10. It is. As shown in FIG. 5A, the restricting portion 23 guides the transmission member 10 in a state where the rear lower portion of the transmission member 10 is sandwiched, and also causes the transmission member 10 to shake laterally during package transportation. It is configured to regulate.

  The transmission member 10 is made of a hard synthetic resin such as ABS resin, and rotates the hammer member 11 in the vertical direction by rotating in the vertical direction in response to the key pressing operation of the key 2 as shown in FIGS. The transmission main body 25 includes a transmission fitting portion 26 that is integrally formed with the transmission main body 25 and is rotatably attached to the transmission holding shaft 24 of the transmission holding portion 13.

  As shown in FIGS. 6A and 6B, the transmission main body 25 is formed in a waffle shape. That is, the transmission main body portion 25 includes a thin vertical plate portion 25a and a plurality of rib portions 25b formed in a lattice shape on the outer peripheral portion and both side surfaces of the vertical plate portion 25a. It is formed into a shape.

  As shown in FIG. 6A and FIG. 6B, the transmission main body 25 adjusts the weight of the transmission member 10 according to the shape of the vertical plate portion 25a and the formation density of the plurality of rib portions 25b. It is configured. Further, the transmission main body 25 is configured so that the strength is secured by the plurality of rib portions 25b and the occurrence of sink marks in the vertical plate portion 25a during molding, even if the vertical plate portion 25a is formed thin. Has been.

  As shown in FIGS. 6 and 7, the transmission fitting portion 26 is formed in an inverted C shape as a whole, and is formed to project rearward from the rear end portion of the transmission main body portion 25 via a connecting neck portion 26 a. . That is, as shown in FIG. 5A, the transmission fitting portion 26 is formed such that the thickness in the arrangement direction of the keys 2 is substantially the same as that between the pair of guide walls 22a of the shaft support portion 22. It is configured to be slidably inserted between the guide walls 22a.

  Further, as shown in FIGS. 6 and 7, the transmission fitting portion 26 is formed with a fitting hole 26b into which the transmission holding shaft 24 of the transmission holding portion 13 is fitted, and the fitting hole 26b. An insertion port 26c into which the transmission holding shaft 24 is removably inserted is formed in a part around the periphery of the fitting hole 26b, that is, the rear portion around the fitting hole 26b, and the transmission holding shaft 24 is inserted into the fitting hole 26b through the insertion port 26c. By doing so, it is configured to be rotatably attached to the transmission holding shaft 24.

  In this case, as shown in FIG. 5B, the transmission holding shaft 24 of the transmission holding unit 13 is formed with notches 24a on both sides of the front and rear thereof in parallel with each other in a substantially vertical state. Thus, the transmission holding shaft 24 is formed such that the length L1 in the front-rear direction (left-right direction in FIG. 5B) is smaller than the outer diameter R1 of the transmission holding shaft 24 (L1 <R1). Further, as shown in FIG. 6A, the transmission fitting portion 26 is formed such that the inner diameter R2 of the fitting hole 26b is the same size as the outer diameter R1 of the transmission holding shaft 24 (R2≈R1). .

  Further, as shown in FIGS. 6 and 7, the insertion opening 26 c of the transmission fitting portion 26 is formed radially from the center of the fitting hole 26 b toward the outer periphery of the transmission fitting portion 26. Thereby, the insertion port 26c is formed so that the outer peripheral side of the transmission fitting portion 26 is wide and the outer peripheral side of the fitting hole 26b which is the inner peripheral side is narrow. In the insertion port 26c, the opening width W1 of the narrowest portion, that is, the portion located on the outer periphery of the fitting hole 26b may be the same length as the length L1 in the front-rear direction of the transmission holding shaft 24. It is desirable to form a little narrower (W1 ≦ L1).

  Thereby, as shown in FIG. 7A, the transmission fitting portion 26 moves the transmission member 10 above the transmission holding shaft 24 when the transmission holding shaft 24 is inserted into the fitting hole 26b through the insertion port 26c. The insertion port 26c is made to stand up and correspond to the notch 24a of the transmission holding shaft 24, and in this state, the insertion port 26c is slightly expanded by the notch 24a of the transmission holding shaft 24 by press-fitting. Is configured to be inserted and fitted into the fitting hole 26b.

  Further, as shown in FIGS. 5A and 6B, the transmission fitting portion 26 has a slit groove 26d in the middle portion in the thickness direction in a direction perpendicular to the axial direction of the transmission holding shaft 24. That is, it is configured along the longitudinal direction of the transmission member 10. Thereby, the transmission fitting part 26 is comprised so that it may elastically deform in the axial direction of the transmission holding shaft 24 which is the thickness direction. Thereby, when the transmission fitting part 26 is inserted between a pair of guide walls 22a, it is comprised so that it may slidably contact to each opposing surface of a pair of guide wall 22a by the slit groove | channel 26d.

  By the way, on the rear lower part of the transmission main body 25 of the transmission member 10, as shown in FIGS. 6A and 6B, a thin wall that is regulated by the regulation part 23 of the transmission holding member 12 is used. A joint portion 27 is provided. The engaging portion 27 is formed to have a thickness substantially the same as that between the pair of restricting walls of the restricting portion 23 by notching both side surfaces of the rear lower portion of the transmission main body portion 25. Thereby, the engaging part 27 is inserted between the pair of restricting walls of the restricting part 23 so as to guide the transmission member 10 to be rotatable, and to restrict the lateral deflection of the transmitting member 10 during packaging transportation. It is configured.

  Further, as shown in FIGS. 2 and 7B, the transmission main body 25 of the transmission member 10 is formed such that a lower portion thereof protrudes toward the upper surface of the key 2. A first transmission felt 28 is provided at the lower end of the transmission main body 25. The first transmission felt 28 is configured such that a capstan 29 provided on the upper rear side of the key 2 abuts from below. As a result, when the key 2 is depressed, the transmission member 10 is pushed up by the capstan 29 of the key 2 that contacts the first transmission felt 28 from below, and rotates counterclockwise about the transmission holding shaft 24. It is comprised so that it may rotate.

  Further, as shown in FIGS. 2 and 7B, the transmission main body 25 of the transmission member 10 is formed such that the upper part of the front end is higher than the upper part of the rear end, so that the upper side part is inclined to the lower part of the rear part. Is formed. A second transmission felt 30 is provided on the upper front end of the transmission main body 25.

  As shown in FIG. 2 and FIG. 7B, the second transmission felt 30 is configured such that a hammer protrusion 31 (to be described later) of the hammer member 11 abuts from above. Thereby, when the key 2 is depressed and the transmission member 10 rotates counterclockwise around the transmission holding shaft 24, the transmission member 10 pushes up the hammer protrusion 31 of the hammer member 11 and rotates the hammer member 11 clockwise. It is configured to let you.

  On the other hand, the hammer support rail 18 is made of, for example, a metal such as a steel plate or aluminum, and as shown in FIG. 1 to FIG. It is formed in the length over the full length of 2 arrangement directions. The hammer support rail 18 is configured such that a predetermined portion in the arrangement direction of the keys 2 is attached on each front rail support portion 20 d of the plurality of support members 20. On the hammer support rail 18, a plurality of hammer holding members 14 are attached along the arrangement direction of the keys 2.

  The hammer holding member 14 is made of a hard synthetic resin such as ABS resin, and as shown in FIGS. 8A and 8B, a plurality of hammer holding members 14 are provided at the rear end portion of the rail-shaped main body plate 14a opened upward. The hammer holding portions 15 are integrally formed along the arrangement direction of the keys 2 in a state where, for example, about 10 keys 2 are held. The hammer holding portion 15 includes a shaft support portion 32 to which the hammer member 11 is rotatably attached and prevents the hammer member 11 from sideways.

  In this case, as shown in FIGS. 3 and 8, the shaft support portion 32 is formed at the rear end portion (left end portion in FIG. 3) on the main body plate 14 a of the hammer holding member 14 so as to correspond to each transmission member 10. A pair of guide walls 32a, and a hammer holding shaft 34 formed between the pair of guide walls 32a. The pair of guide walls 32a constitutes a guide portion that rotatably guides the hammer fitting portion 37 of the hammer member 11 in a state where a hammer fitting portion 37 (to be described later) of the hammer member 11 is slidably sandwiched from both sides. ing.

  The hammer member 11 is made of a hard synthetic resin such as ABS resin, and has a hammer portion 35 and a hammer arm 36 as shown in FIGS. 8 and 9, and these are integrally formed. . The hammer portion 35 has a bowl-shaped vertical plate portion 35a, and has a configuration in which rib portions 35b are formed on the outer peripheral portion and both side surfaces thereof. The hammer arm 36 has a lateral plate portion 36a whose length in the front-rear direction is substantially the same as that of the transmission member 10, and has a configuration in which rib portions 36b are formed on the outer peripheral portion and both side surfaces thereof.

  A hammer fitting portion 37 that is rotatably attached to the shaft support portion 32 of the hammer holding member 14 is formed at the front end portion (right end portion in FIG. 9) of the hammer arm 36, as shown in FIGS. ing. The hammer fitting portion 37 is formed in a C shape as a whole like the transmission fitting portion 26, and is formed to project forward from the front end portion of the hammer arm 36 via a connecting neck portion 37a. That is, the hammer fitting portion 37 is formed so that the thickness in the arrangement direction of the keys 2 is substantially the same as that between the pair of guide walls 32a of the shaft support portion 32, and is slidable between the pair of guide walls 32a. It is configured to be inserted.

  Further, as shown in FIGS. 8 to 10, the hammer fitting portion 37 is formed with a fitting hole 37b into which the hammer holding shaft 34 of the hammer holding portion 15 is fitted. An insertion port 37c into which the hammer holding shaft 34 is removably inserted is formed in a part in the periphery, that is, in the front portion around the fitting hole 37b, and the hammer holding shaft 34 is inserted into the fitting hole 37b through the insertion port 37c. By doing so, it is configured to be rotatably attached to the hammer holding shaft 34.

  In this case, as shown in FIGS. 8 to 10, the hammer holding shaft 34 of the hammer holding portion 15 is formed in parallel with each other in a state in which the notch portions 34 a are substantially perpendicular to both front and rear sides. Thereby, the hammer holding shaft 34 is formed such that the length L2 in the front-rear direction (left-right direction in FIG. 8B) is smaller than the outer diameter R3 of the hammer holding shaft 34 (L2 <R3). Further, as shown in FIG. 10A, the hammer fitting portion 37 is formed such that the inner diameter R4 of the fitting hole 37b is the same size as the outer diameter R3 of the hammer holding shaft 34 (R4≈R3). .

  Further, as shown in FIGS. 9 and 10, the insertion port 37 c of the hammer fitting portion 37 is formed radially from the center of the fitting hole 37 b toward the outer periphery of the hammer fitting portion 37. Thereby, the insertion port 37c is formed so that the outer peripheral side of the hammer fitting portion 37 is wide and the outer peripheral side of the fitting hole 37b which is the inner peripheral side is narrow, like the insertion port 26c of the transmission fitting portion 2. . In this insertion port 37c, the opening width W2 of the narrowest portion, that is, the portion located on the outer periphery of the fitting hole 37b may be the same length as the length L2 in the front-rear direction of the hammer holding shaft 34. Also, it is desirable to form a slightly narrower (W3 ≦ L2).

  As a result, as shown in FIGS. 9 and 10, the hammer fitting portion 37 moves the hammer member 11 above the hammer holding shaft 34 when the hammer holding shaft 34 is inserted into the fitting hole 37 b through the insertion port 37 c. The insertion port 37c is made to stand up and correspond to the notch 34a of the hammer holding shaft 34. In this state, the insertion port 37c is slightly pushed and widened by the notch 34a of the hammer holding shaft 34 by press-fitting. Is configured to be inserted and fitted into the fitting hole 37b.

  Further, as shown in FIG. 8A, the hammer fitting portion 37 has a slit groove 37d in the middle portion in the thickness direction in a direction perpendicular to the axial direction of the hammer holding shaft 34, that is, the longitudinal direction of the hammer member 11. It is the structure formed along the direction. Thereby, the hammer fitting part 37 is comprised so that it may elastically deform in the axial direction of the hammer holding shaft 34 which is the thickness direction. Thus, when the hammer fitting portion 37 is inserted between the pair of guide walls 32a, the hammer fitting portion 37 is configured to be slidably elastically contacted with the opposing surfaces of the pair of guide walls 32a by the slit grooves 37d.

  Further, as shown in FIGS. 9 and 10, a hammer protrusion 31 that abuts from above on the second transmission felt 30 provided at the upper front end of the transmission main body 25 of the transmission member 10, at the lower front end of the hammer arm 36. Is provided. Thereby, when the transmission member 10 rotates counterclockwise, the hammer member 11 is rotated clockwise around the hammer holding shaft 34 of the hammer holding portion 15 by pushing up the hammer protrusion 31 according to the rotation. Is configured to do.

  Further, as shown in FIGS. 2 and 10B, the hammer arm 36 is configured to be regulated to the lower limit position, which is the initial position, when the lower end of the hammer arm 36 comes into contact with the lower limit stopper 38 from above. ing. That is, the lower limit stopper 38 is attached on a lower limit stopper rail 39 supported by a plurality of stopper support portions 21 provided on the transmission support rail 17. In this case, as shown in FIGS. 10A and 10B, each of the plurality of stopper support portions 21 is formed such that each upper portion thereof is inclined downward in the rear portion.

  The lower limit stopper rail 39 is made of, for example, a metal such as a steel plate or aluminum, and is formed in a rail shape opened to the lower side as shown in FIGS. 1 and 10, and has a length over the entire length in the arrangement direction of the keys 2. Is formed. The lower limit stopper rail 39 is attached to each upper portion of the plurality of stopper support portions 21 in a state of being inclined rearward and downward. For this reason, the lower limit stopper 38 is provided on the lower limit stopper rail 39 in a state where it is inclined rearwardly downward. As a result, the hammer member 10 is configured to be regulated at the initial position in a state where the lower end of the rear end of the hammer arm 36 abuts the lower limit stopper 38 from above to incline rearwardly downward.

  Further, as shown in FIGS. 2 and 10B, the hammer arm 36 is configured such that the upper end position thereof is regulated by the rear end upper portion coming into contact with the upper limit stopper 40 from below. That is, the upper limit stopper 40 is attached to the lower surface of the upper limit stopper rail 41 attached to each stopper rail support portion 20e of the plurality of support members 20.

  In this case, the upper limit stopper rail 41 is made of a metal such as a steel plate or aluminum, and is a long plate having a substantially L-shaped cross section as shown in FIG. 2 and FIG. It is formed in a length over the entire length in the arrangement direction. The upper limit stopper rail 41 has a horizontal portion protruding rearward from each stopper rail support portion 20e of the plurality of support members 20, and a vertical portion is attached to each stopper rail support portion 20e by screws 41a.

  The upper limit stopper 40 is provided on the lower surface of the horizontal portion of the upper limit stopper rail 41 as shown in FIG. 2 and FIG. Thereby, when the hammer arm 36 rotates clockwise around the hammer holding shaft 34 of the hammer holding portion 15, the upper end of the hammer arm 36 comes into contact with the upper limit stopper 40 from below. The upper limit position is restricted.

  Further, as shown in FIGS. 2 and 10B, a switch pressing portion 42 is formed at the upper front end of the hammer arm 36. A switch substrate 43 is disposed by a pair of substrate support rails 44 above the hammer arm 36 corresponding to the switch pressing portion 42. Each of the pair of board support rails 44 is a long plate having an L-shaped cross section, and is formed to have a length extending over the entire length in the arrangement direction of the keys 2.

  The pair of substrate support rails 44 are made of a metal such as a steel plate or aluminum, for example, and as shown in FIGS. 2 and 10B, each horizontal portion thereof is on each substrate rail support portion 20f of the plurality of support members 20. Are attached at predetermined intervals. As shown in FIG. 1, the switch board 43 is divided into a plurality of parts. In other words, in this embodiment, the switch board 43 is divided into, for example, four parts, and is attached on the pair of board support rails 44 with a length corresponding to about 20 keys 2.

  Rubber switches 45 are respectively provided on the lower surfaces of these switch substrates 43 as shown in FIGS. 1, 2 and 10B. The rubber switch 45 has a structure in which an inverted dome-shaped bulging portion 45a is formed on a rubber sheet long in the arrangement direction of the keys 2 so as to correspond to the plurality of hammer arms 36, respectively. Inside the bulging portion 45a, there are a plurality of movable contacts 45b that come into contact with and separate from a plurality of fixed contacts (not shown) provided on the lower surface of the switch substrate 43 along the front-rear direction of the hammer arm 36. Is provided.

  Thereby, as shown in FIG. 2, the rubber switch 45 is rotated clockwise around the hammer holding shaft 34 of the hammer holding portion 15 by the hammer pressing portion 42 of the hammer arm 36 from the lower side. When pressed, the inverted dome-shaped bulging portion 45a is elastically deformed, and the plurality of movable contacts 45b sequentially contact the plurality of fixed contacts with time, thereby increasing the key pressing strength of the key 2. A corresponding switch signal is output to a sound source (not shown) that generates a musical sound.

Next, the case where the keyboard apparatus 1 of such an electronic keyboard musical instrument is assembled will be described.
First, a plurality of keys 2 and a plurality of support members 20 are installed on the base member 5. In this case, as shown in FIGS. 1 and 2, 88 keys 2 are arranged in parallel on the base member 5 with the balance pins 4a and 4b being rotatably attached thereto in the vertical direction. In addition, the support member 20 is attached to locations on both ends of the base member 5 in the arrangement direction of the keys 2 and to locations between the three keys 2 located for each of the 20 keys 2.

  In this state, as shown in FIG. 3, the transmission support rails 17 are attached to the rear rail support portions 20 c of the plurality of support members 20 and arranged over the entire length in the arrangement direction of the keys 2. A plurality of transmission holding members 12 and a plurality of stopper support portions 21 are attached on the rail 17 along the arrangement direction of the keys 2.

  In this case, the plurality of stopper support portions 21 are attached to five locations on the transmission support rails 17 corresponding to the plurality of support members 10 in a state of protruding above the plurality of transmission holding members 12. Similarly, the hammer support rails 18 are attached to the front rail support portions 20d of the plurality of support members 20 and arranged over the entire length of the key 2 in the arrangement direction, and a plurality of hammer holding members are provided on the hammer support rails 18. 14 is attached along the arrangement direction of the keys 2.

  In this state, the plurality of transmission members 10 are sequentially attached to the transmission holding portions 13 of the plurality of transmission holding members 12. In this case, as shown in FIG. 7A, the transmission member 10 is erected above the transmission holding portion 13, and the insertion port 26 c of the transmission fitting portion 26 is connected to the transmission holding shaft 24 of the transmission holding portion 13. In this state, the transmission holding shaft 24 is inserted into the fitting hole 26b through the insertion port 26c by press fitting.

  At this time, since the insertion port 26c is formed so that the outer peripheral side of the transmission fitting portion 26 is wide and the inner peripheral side is narrow, the insertion port 26c can be easily and easily inserted into the transmission holding shaft 24. Further, when the transmission holding shaft 24 is inserted into the insertion port 26c, the insertion port 26c is slightly expanded by the notch 24a of the transmission holding shaft 24, so that the transmission holding shaft 24 is fitted into the fitting hole through the insertion port 26c. It is inserted into 26b and fitted so as to be rotatable. In this state, the transmission member 10 is rotated clockwise around the transmission holding shaft 24.

  At this time, when the transmission fitting portion 26 is inserted between the pair of guide walls 22a of the shaft support portion 22, the transmission fitting portion 26 is formed between the pair of guide walls 22a by the slit groove 26d of the transmission fitting portion 26. It rotates in a state of being slidably elastically contacted with each facing surface. For this reason, the transmission member 10 does not touch the arrangement direction of the keys 2. At this time, the first transmission felt 28 below the transmission member 10 contacts the capstan 29 of the key 2 from above, and the transmission member 10 is restricted to the initial position.

  In this case, the engaging portion 27 provided at the lower rear portion of the transmission member 10 is inserted between the pair of restriction walls which are the restriction portions 23 of the transmission holding portion 15 to guide the transmission member 10 to be rotatable. In addition, the lateral movement of the transmission member 10 in the direction in which the keys 2 are arranged is restricted during package transportation. In this state, the insertion opening 26c of the transmission fitting portion 26 corresponds to the notch 24a on the rear side of the transmission holding shaft 24, so that the transmission fitting portion 26 is carelessly inserted from the transmission holding shaft 24 into the insertion port. There is no escape through 26c.

  In this way, the plurality of transmission members 10 are respectively raised to correspond to the transmission holding portions 13 of the transmission holding member 12, and in this state, the transmission fitting portions 26 of the transmission member 10 are transferred to the transmission holding portions 13. By sequentially fitting the holding shaft 24, the plurality of transmission members 10 are sequentially attached to the transmission holding portions 13 of the transmission holding member 12. This attachment operation is similarly performed on each transmission holding portion 13 of the plurality of transmission holding members. Thereby, all the transmission members 10 corresponding to all the keys 2 are attached.

  Thereafter, a lower limit stopper rail 39 is attached to the upper part of the plurality of stopper support portions 21, and a lower limit stopper 38 is attached on the lower limit stopper rail 39. Then, the plurality of hammer members 11 are sequentially attached to the respective hammer holding portions 15 of the plurality of hammer holding members 14. In this case, as shown in FIG. 10A, the hammer member 11 is raised above the hammer holding portion 15, and the insertion port 37 c of the hammer fitting portion 37 is connected to the hammer holding shaft 34 of the hammer holding portion 15. In this state, the hammer holding shaft 23 is inserted into the fitting hole 37b through the insertion port 37c by press fitting.

  At this time, since the insertion port 37c is formed so that the outer peripheral side of the hammer fitting portion 37 is wide and the inner peripheral side is narrow, the insertion port 37c can be easily and easily inserted into the hammer holding shaft 34. Further, when the hammer holding shaft 34 is inserted into the insertion port 37c, the insertion port 37c is slightly expanded by the notch 34a of the hammer holding shaft 34, so that the hammer holding shaft 34 is fitted through the insertion port 37c. It inserts in 37b and fits rotatably.

  At this time, when the hammer fitting portion 37 is inserted between the pair of guide walls 32 a of the shaft support portion 32, the hammer fitting portion 37 is formed between the pair of guide walls 32 a by the slit groove 37 d of the hammer fitting portion 37. It rotates in a state of being slidably elastically contacted with each facing surface. As a result, the hammer member 11 rotates in the vertical direction without being laterally touched in the arrangement direction of the keys 2.

  In this state, the hammer member 11 is rotated counterclockwise around the hammer holding shaft 34. Then, the hammer protrusion 31 of the hammer member 11 contacts the second transmission felt 30 of the transmission member 10 from above, and the lower rear portion of the hammer arm 36 contacts the lower limit stopper 38 from above. As a result, the hammer member 11 is regulated to the initial position in a state where the hammer member 11 is inclined rearwardly downward.

  In this way, the plurality of hammer members 11 are raised to correspond to the respective hammer holding portions 15 of the hammer holding member 14, and in this state, the respective hammer fitting portions 37 of the hammer member 11 are connected to the respective hammer holding portions 15. By sequentially fitting the holding shaft 34, the plurality of hammer members 11 are sequentially attached to the respective hammer holding portions 15 of the hammer holding member 14. This attachment operation is similarly performed on each hammer holding portion 15 of the plurality of hammer holding members 14. Thereby, all the hammer members 11 are attached corresponding to all the keys 2.

  Thereafter, the upper limit stopper rail 41 is attached to each stopper rail support portion 20 e of the plurality of support members 20, and the upper limit stopper 40 is attached to the lower surface of the upper limit stopper rail 41. In addition, a pair of board support rails 44 are mounted on the board rail support portions 20f of the plurality of support members 20 at a predetermined interval, and the plurality of switch boards 43 are arranged on the pair of board support rails 44 in the arrangement direction of the key 2. Install along.

  In this case, the rubber switch 45 is attached to the lower surface of the switch substrate 43 in advance. When the switch board 43 is mounted on the pair of board support rails 44, the bulging portions 45a of the rubber switch 45 are made to correspond to the switch pressing portions 42 of the plurality of hammer arms 36, respectively.

Next, the operation of the keyboard device 1 of such an electronic keyboard instrument will be described.
In this keyboard device 1, a key 2 is depressed to perform a performance. At this time, when the key 2 is depressed, the key 2 rotates clockwise around the balance pins 4 a and 4 b, and the capstan 29 of the key 2 pushes up the transmission member 10. Thereby, the transmission member 10 rotates counterclockwise around the transmission holding shaft 24 of the transmission holding portion 13.

  At this time, since the transmission holding shaft 24 of the transmission holding portion 13 is fitted in the fitting hole 26a of the transmission fitting portion 26 of the transmission member 10, the transmission member 10 is not displaced in the front-rear direction of the key 2. , It rotates smoothly around the transmission holding shaft 24. Further, at this time, since the transmission fitting portion 26 of the transmission member 10 is guided in a state of being slidably rotatable between the pair of guide walls 22a of the transmission holding portion 13, the transmission member 10 swings sideways. Smoothly rotates up and down.

  As described above, when the transmission member 10 is pushed up by the capstan 29 of the key 2 and rotates counterclockwise, the hammer protrusion 31 of the hammer member 11 is pushed up by the second felt 30 of the transmission member 10. As a result, the hammer member 11 rotates clockwise around the hammer holding shaft 34 of the hammer holding portion 15 to apply an action load to the key 2.

  At this time, similarly to the transmission member 10, the hammer holding shaft 34 of the hammer holding portion 15 is fitted in the fitting hole 37 a of the hammer fitting portion 37 of the hammer member 11. The hammer holding shaft 34 rotates smoothly without being displaced. At this time, since the hammer fitting portion 37 of the hammer member 11 is guided while being slidably rotatable between the pair of guide walls 32 a of the hammer holding portion 15, the hammer member 11 swings sideways. Smoothly rotates up and down.

  Thus, when the hammer member 11 rotates clockwise about the hammer holding shaft 34, an action load is applied to the key 2 by the moment of inertia of the hammer member 11. That is, the hammer arm 36 is formed so that the length of the key 2 in the front-rear direction is substantially the same as that of the transmission member 10, and a hammer portion 35 is formed at the rear end portion of the hammer hammer arm 36. A fitting portion 37 at the front end portion of 36 is rotatably attached to the hammer holding shaft 34.

  For this reason, when the hammer member 11 rotates clockwise around the hammer holding shaft 34, an inertia moment is generated in the hammer member 11, and an action load is applied to the key 2 by this inertia moment. Thereby, a key touch feeling very close to the key touch feeling of an acoustic piano can be obtained.

  When the hammer member 11 rotates clockwise about the hammer holding shaft 34 in this way, the switch pressing portion 42 of the hammer arm 36 moves down the inverted dome-shaped bulging portion 45 a of the rubber switch 45 provided on the switch substrate 43. Press from the side. As a result, the inverted dome-shaped bulging portion 45a is elastically deformed, and the plurality of movable contacts 45b in the bulging portion 45a sequentially contact with the plurality of fixed contacts with time, thereby pressing the key 2 A switch signal corresponding to the strength is output, and a musical sound is generated from a speaker (not shown).

  When the hammer member 11 further rotates clockwise about the hammer holding shaft 34, the upper end of the hammer arm 36 comes into contact with the upper limit stopper 40 from the lower side, and the rotation of the hammer member 11 is restricted. Thereafter, when the key 2 starts a key release operation, the transmission member 10 rotates clockwise to return to the initial position, and the hammer member 11 rotates counterclockwise to return to the initial position.

  As described above, according to the action mechanism 3 of the electronic keyboard instrument, the plurality of keys 2 arranged in parallel and the plurality of transmission members 10 that rotate in the vertical direction in response to a key pressing operation of the plurality of keys 2 are provided. And a plurality of hammer members 11 that respectively rotate in the vertical direction according to each rotation operation of the plurality of transmission members 10 to apply an action load to each of the plurality of keys 2, and the plurality of transmission members 10 are respectively rotatable. Since the plurality of transmission holding portions 13 to be held are provided with the transmission holding member 12 integrally formed along the arrangement direction of the keys 2, assembly work is easy, productivity is high, and cost is reduced. I can plan.

  That is, in the action mechanism 3 of the electronic keyboard instrument, before the plurality of transmission members 10 are attached to the transmission holding member 12, the plurality of transmission holding portions 13 that respectively hold the plurality of transmission members 10 rotatably are individually provided. There is no need to manufacture and assemble, and by simply installing the transmission holding member 12, a plurality of transmission holding portions 13 can be easily installed at a time. For this reason, since the assembly work can be easily performed, the productivity is good and the cost can be reduced.

  In this case, each of the plurality of transmission holding portions 13 of the transmission holding member 12 has a transmission holding shaft 24, and the transmission member 10 is inserted into each of the transmission holding shafts 24 so as to be detachable from the direction orthogonal to the axial direction. By having the transmission fitting portion 26 that is rotatably attached, the transmission fitting portion 26 of the transmission member 10 is simply inserted into the transmission holding shaft 24 of the transmission holding portion 13 from the direction orthogonal to the axial direction. Since it can be easily and easily attached, the assembly workability is good.

  That is, the transmission holding shaft 24 of the transmission holding portion 13 is formed in parallel with each other with a pair of cutout portions 24a on both sides thereof, and the transmission fitting portion 26 of the transmission member 10 is at its center. The fitting hole 26b is formed in the portion, and the insertion port 26c is formed around the fitting hole 26b, so that the transmission fitting is performed from above in the vertical direction along the pair of notches 24a formed on both sides of the transmission holding shaft 24. Since the transmission holding shaft 24 may be fitted into the fitting hole 26b of the transmission fitting portion 26 through the insertion port 26c of the joint portion 26, the transmission member 10 can be easily and easily attached to the transmission holding portion 13. .

  In this case, the transmission holding shaft 24 is formed such that the length L1 in the front-rear direction is smaller than the outer diameter R1 of the transmission holding shaft 24, and the transmission fitting portion 26 is transmitted by the inner diameter R2 of the fitting hole 26b. Since the holding shaft 24 is formed in the same size as the outer diameter R1 and the opening width W1 of the narrowest portion of the insertion port 26c is formed to be slightly narrower than the length L1 in the front-rear direction of the transmission holding shaft 24, transmission When the transmission holding shaft 24 is inserted into the fitting hole 26b through the insertion port 26c of the fitting portion 26, the insertion port 26c is slightly expanded by the notch portion 24a of the transmission holding shaft 24 by press-fitting, thereby transmitting the transmission holding shaft. 24 can be fitted into the fitting hole 26b.

  For this reason, even if the plurality of transmission holding portions 13 are installed in advance along the arrangement direction of the key 2 before the plurality of transmission members 10 are attached to the transmission holding member 12, a plurality of transmission holding members 12 are installed. Since each transmission member 10 can be easily and easily attached to the transmission holding part 13 in order, the assembling work can be facilitated and productivity can be improved. In this case, since the insertion port 26c is formed so that the outer peripheral side of the transmission fitting portion 26 is wide and the inner peripheral side is narrow, the insertion port 26c can be easily and easily inserted into the transmission holding shaft 24. Assembling work can be facilitated, and productivity can be improved.

  In addition, the transmission holding portion 13 is provided with a pair of guide walls 22 a that prevent lateral movement of the transmission member 10, whereby the transmission fitting portion 26 of the transmission member 10 is attached to the transmission holding shaft 24 of the transmission holding portion 13. When attached rotatably, the transmission fitting portion 26 can be slidably sandwiched between the pair of guide walls 22a. In this case, since the slit groove 26d is formed in the transmission fitting portion 26 along the longitudinal direction of the transmission member 10, the slit is formed when the transmission fitting portion 26 is inserted between the pair of guide walls 22a. The groove 26d can be slidably contacted with the pair of guide walls 22a.

  For this reason, in this action mechanism 3, when the transmission member 10 rotates in response to the key pressing operation, the transmission member 10 is not swung in the direction in which the keys 2 are arranged by the pair of guide walls 22 a of the transmission holding portion 13. As a result, the transmission member 10 can be rotated smoothly and satisfactorily, and the positional accuracy and operation accuracy of the transmission member 10 can be increased.

  Further, the transmission holding portion 13 is provided with a restriction portion 23 that restricts the lateral position of the transmission member 10, and the restriction portion 23 is a pair of body plates 12 a formed on the transmission holding member 12. By being a structure that restricts the lateral position of the transmission member 10 in a state of sandwiching the engaging portions 27 that are notched on both side surfaces of the rear lower portion of the transmission main body portion 25 of the transmission member 10. Since the engaging portion 27 of the transmission member 10 can be regulated between the pair of regulating walls of the regulating portion 23, the transmission member 10 can be guided to be rotatable, and the transmission member 10 can be swung laterally during packaging. The position can be well regulated without causing

  Further, according to the action mechanism 3 of the electronic keyboard instrument, a plurality of keys 2 arranged in parallel, a plurality of transmission members 10 that respectively rotate in the vertical direction in response to a key pressing operation of the plurality of keys 2, A plurality of hammer members 11 that rotate in the vertical direction according to each rotation of the plurality of transmission members 10 to apply an action load to each of the plurality of keys 2, and each of the plurality of hammer members 11 is rotatably held. Since the plurality of hammer holding portions 15 are provided with the hammer holding member 14 integrally formed along the arrangement direction of the keys 2, the assembling work is easy, the productivity is high, and the cost is reduced. be able to.

  That is, in the action mechanism 3 of the electronic keyboard instrument, before attaching the plurality of hammer members 11 to the hammer holding member 14, the plurality of hammer holding portions 15 that respectively hold the plurality of hammer members 11 rotatably are individually provided. There is no need to manufacture and assemble, and a plurality of hammer holding portions 15 can be easily installed at a time simply by installing the hammer holding member 14. For this reason, since the assembly work can be easily performed, the productivity is good and the cost can be reduced.

  In this case, each of the plurality of hammer holding portions 15 of the hammer holding member 14 has a hammer holding shaft 34, and the hammer member 11 is inserted into each of the hammer holding shafts 34 so as to be detachable from the direction perpendicular to the axial direction. By having the hammer fitting portion 37 that is rotatably attached, the hammer fitting portion 37 of the hammer member 11 is orthogonal to the hammer holding shaft 34 of the hammer holding portion 15 in the same direction as the transmission member 10. Since it can be easily and easily attached only by inserting from the direction, the assembly workability is good.

  That is, the hammer holding shaft 34 of the hammer holding portion 15 is formed in parallel with each other with a pair of notches 34a on the both sides thereof in a substantially vertical state. Since the fitting hole 37b is formed in the part and the insertion port 37c is formed around the fitting hole 37b, the hammer is formed from above in the vertical direction along the pair of notch parts 34a formed on both sides of the hammer holding shaft 34. Since the hammer holding shaft 34 may be fitted into the fitting hole 37b of the hammer fitting portion 37 through the insertion port 37c of the fitting portion 37, the hammer member 11 can be easily and easily attached to the hammer holding portion 15. it can.

  In this case, the hammer holding shaft 34 has a length L2 in the front-rear direction smaller than the outer diameter R3 of the hammer holding shaft 34, and the hammer fitting portion 37 has an inner diameter R4 of the fitting hole 37b. The holding shaft 34 is formed in the same size as the outer diameter R3, and the opening width W2 of the narrowest portion of the insertion port 37c is formed to be slightly narrower than the longitudinal length L2 of the hammer holding shaft 34. When the hammer holding shaft 34 is inserted into the fitting hole 37b through the insertion port 37c of the fitting portion 37, the insertion port 26c is slightly expanded by the notch 34a of the hammer holding shaft 34 by press-fitting, and the hammer holding shaft 34 can be fitted into the fitting hole 37b.

  For this reason, even if the plurality of hammer holding portions 15 are installed in advance along the arrangement direction of the key 2 before the plurality of hammer members 11 are attached to the hammer holding member 14, Since each hammer member 11 can be easily and easily attached to the hammer holding portion 15 in order, assembly work can be facilitated and productivity can be improved. In this case, since the insertion port 37c is formed so that the outer peripheral side of the hammer fitting portion 37 is wide and the inner peripheral side is narrow, the insertion port 37c can be easily and easily inserted into the hammer holding shaft 34. Assembly work can be facilitated, and productivity can be improved.

  Further, the hammer holding portion 15 is provided with a pair of guide walls 32 a for preventing the hammer member 11 from swinging, whereby the hammer fitting portion 37 of the hammer member 11 is attached to the hammer holding shaft 34 of the hammer holding portion 15. When attached rotatably, the hammer fitting portion 37 can be slidably sandwiched between the pair of guide walls 32a. In this case, since the slit groove 37d is formed in the hammer fitting portion 37 along the longitudinal direction of the hammer member 11, the slit is formed when the hammer fitting portion 37 is inserted between the pair of guide walls 32a. The grooves 37d can be slidably elastically contacted with the pair of guide walls 32a.

  For this reason, in this action mechanism 3, when the hammer member 11 is rotated in response to the key pressing operation, the hammer member 11 is prevented from swinging in the arrangement direction of the key 2 by the pair of guide walls 32 a of the hammer holding portion 15. Thus, the hammer member 11 can be rotated smoothly and satisfactorily, and the position accuracy and operation accuracy of the hammer member 11 can be increased.

  Further, in the action mechanism 3 of the electronic keyboard instrument, a transmission support rail 17 that is arranged along the arrangement direction of the keys 2 and to which the transmission holding member 12 is attached, and a hammer holding member that is arranged along the arrangement direction of the keys 2. And a hammer support rail 18 to which 14 is attached, whereby the transmission holding member 12 in which a plurality of transmission holding portions 13 are integrally formed along the arrangement direction of the keys 2 is sequentially attached on the transmission support rail 17. In addition, the hammer holding member 14 in which the plurality of hammer holding portions 15 are integrally formed along the arrangement direction of the key 2 can be sequentially mounted on the hammer support rail 18, thereby simplifying the assembling work. Can be achieved.

  Further, the action mechanism 3 of the electronic keyboard instrument is provided with a plurality of support members 20 that are respectively arranged at a plurality of predetermined positions in the entire length in the arrangement direction of the keys 2 and support the transmission support rail 17 and the hammer support rail 18. Therefore, the transmission support rail 17 and the hammer support rail 18 can be reliably and satisfactorily delivered in a stable state over the entire length in the arrangement direction of the keys 2 by the plurality of support members 20. And the some transmission member 10 and the some hammer member 11 can be attached favorably.

  In the above-described embodiment, the notch portions 24a are formed in parallel on both sides of the transmission holding shaft 24 provided in each of the plurality of transmission holding portions 13 of the transmission holding member 12, and the transmission fitting portion of the transmission member 10 is formed. A fitting hole 26b is formed in the central portion of the guide 26, an insertion port 26c is formed in a part of the periphery thereof, and the insertion port 26c is slightly expanded by the notch 24a of the transmission holding shaft 24 by press-fitting. Although the case where 24 is configured to be fitted into the fitting hole 26b has been described, the present invention is not limited to this. For example, it may be configured as in the first modification shown in FIGS. good.

  That is, in the first modification, the transmission holding shafts 50 provided in the plurality of transmission holding portions 13 of the transmission holding member 12 are formed in a round bar shape having a circular cross section, and the transmission fitting portion 51 of the transmission member 10 is formed. A configuration is formed in which a fitting hole 51b is formed in the central portion, an insertion port 51c is formed in a part of the periphery thereof, and the transmission fitting portion 51 is elastically deformed in this state by giving elasticity in the radial direction. It has become.

  In this case, the transmission fitting portion 51 is configured to be elastically deformed in the radial direction by forming an arcuate slit hole 51d along the periphery of the fitting hole 51b. For this reason, even if the width W3 of the narrowest part is formed smaller than the outer diameter R5 of the transmission holding shaft 50, the insertion port 51c is fitted with the transmission fitting portion 51 when the transmission holding shaft 50 passes through. It is configured to be elastically deformed in the radial direction of the hole 51b.

  In such a first modification, as shown in FIG. 11A and FIG. 11B, when the transmission holding shaft 50 is inserted into the fitting hole 51b through the insertion port 51c of the transmission fitting portion 51, The transmission holding shaft 50 can be inserted into the insertion port 51 c of the transmission fitting portion 51 from any direction orthogonal to the axial direction of the transmission holding shaft 50.

  In the first modification, when the transmission holding shaft 50 is inserted into the insertion port 51 c of the transmission fitting portion 51, the insertion port 51 c of the transmission fitting portion 51 is pushed and spread in the radial direction by the transmission holding shaft 50. Thus, the transmission fitting portion 51 can be elastically deformed satisfactorily, so that the transmission holding shaft 50 can be reliably and satisfactorily inserted into the fitting hole 51b. In this state, the transmission fitting portion 51 is elastically restored. Then, since it can be elastically fitted to the transmission holding shaft 50, the transmission member 10 can be satisfactorily attached in a rotatable state around the transmission holding shaft 50.

  Further, in the above-described embodiment, the notch portions 34 a are formed in parallel to each other on both sides of the hammer holding shaft 34 provided in each of the plurality of hammer holding portions 15 of the hammer holding member 14, and the hammer fitting portion of the hammer member 11 is formed. A fitting hole 37b is formed in the central portion of 37, an insertion port 37c is formed in a part of the periphery thereof, and the insertion port 37c is slightly expanded by the notch 34a of the transmission holding shaft 34 by press-fitting. Although the case where it was comprised so that 34 may be fitted to the fitting hole 37b was described, it is not restricted to this, For example, it may comprise like the 2nd modification shown to Fig.12 (a) and FIG.12 (b). good.

  That is, in the second modification, the transmission holding shaft 55 provided in the plurality of hammer holding portions 15 of the hammer holding member 14 is formed in a round bar shape with a circular cross section, and the center of the hammer fitting portion 56 of the hammer member 11 is formed. The fitting hole 56b is formed in the portion, the insertion port 56c is formed around the fitting hole 56c, and the hammer fitting portion 56 is elastically deformed in the radial direction in this state so as to be elastically deformed.

  In this case, the hammer fitting portion 56 is configured to be elastically deformed in the radial direction by forming an arcuate slit hole 56d along the periphery of the fitting hole 56b. For this reason, even if the width W4 of the narrowest part is formed smaller than the outer diameter R6 of the hammer holding shaft 55, the insertion port 56c fits the hammer fitting portion 56 when the hammer holding shaft 55 passes through. It is configured to be elastically deformed in the radial direction of the hole 56b.

  In such a second modification, as shown in FIGS. 12A and 12B, when inserting the hammer holding shaft 55 into the fitting hole 56b through the insertion port 56c of the hammer fitting portion 56, The insertion port 56c of the hammer fitting portion 56 can be inserted into the hammer holding shaft 55 from any direction orthogonal to the axial direction of the hammer holding shaft 55.

  Further, in the second modification, when the hammer holding shaft 55 is inserted into the insertion port 56c of the hammer fitting portion 56, the hammer fitting portion 56 is pushed and spread in the radial direction by the hammer holding shaft 55. Since it can be elastically deformed, the hammer holding shaft 55 can be surely and satisfactorily inserted into the fitting hole 56b. In this state, the hammer fitting portion 56 is elastically restored and elastically attached to the hammer holding shaft 55. Since it can be made to fit, the hammer member 11 can be satisfactorily attached in a rotatable state around the hammer holding shaft 55.

  Furthermore, in the above-described embodiment, the case where the transmission support rail 17 and the hammer support rail 18 are formed to the length over the entire length in the arrangement direction of the keys 2 has been described. Like the 3rd modification shown, you may comprise so that the transmission support rail 60 and the hammer support rail 61 may each be divided | segmented into plurality, and it may arrange | position over the full length of the arrangement direction of the key 2. As shown in FIG.

  In this case, the transmission support rail 60 and the hammer support rail 61 may be divided into four for each arrangement interval of the plurality of support members 20, or may be divided into half of the total length in the arrangement direction of the keys 2. It may be further divided into three. Similarly, the lower limit stopper rail 39 and the upper limit stopper rail 41 may be divided into four at intervals of arrangement of the plurality of support members 20 or may be divided into half of the total length in the arrangement direction of the keys 2. It may be further divided into three.

  In the above-described embodiment, the transmission holding member 12 is integrally formed with a plurality of transmission holding portions 13 corresponding to about ten keys 2, and the hammer holding member 14 is provided with a plurality of hammer holding portions 15. The case where they are integrally formed corresponding to each of about two keys 2 has been described. However, the present invention is not limited to this. For example, a plurality of transmission holding portions 13 and a plurality of hammer holding portions 15 correspond to about 20 keys 2 respectively. However, the present invention is not limited thereto, and may be integrally formed so as to correspond to about five keys 2, and the number thereof may be freely selected and formed integrally. good.

  In addition, for example, the transmission member (wipen) is not limited to a member that rotates, but may be configured to transmit the force of the key depression by being displaced (moved) with the key depression.

As mentioned above, although one Embodiment of this invention was described, this invention is not restricted to this, The invention described in the claim and its equal range are included.
The invention described in the claims of the present application will be appended below.

(Appendix)
According to the first aspect of the present invention, the plurality of keys, the plurality of transmission members that rotate in the vertical direction in response to the key pressing operation of the plurality of keys, and the rotation operations of the plurality of transmission members, respectively. A plurality of hammer members that rotate in the vertical direction to apply an action load to each of the plurality of keys, and a plurality of transmission holding portions that rotatably hold the plurality of transmission members, respectively, are integrated along the arrangement direction of the keys. And a transmission holding member formed on the keyboard.

  The invention according to claim 2 is a plurality of keys, a plurality of transmission members that rotate in the vertical direction in response to a key pressing operation of the plurality of keys, and a rotation operation of each of the plurality of transmission members. A plurality of hammer members that rotate in the vertical direction to apply an action load to each of the plurality of keys, and a plurality of hammer holding portions that respectively rotatably hold the plurality of hammer members are integrated along the arrangement direction of the keys. And a hammer holding member formed on the keyboard instrument.

  According to a third aspect of the present invention, in the keyboard instrument according to the first aspect, each of the plurality of transmission holding portions of the transmission holding member has a transmission holding shaft, and the transmission member is provided on each of the transmission holding shafts. It is a keyboard instrument characterized by having a transmission fitting part which is inserted in a direction perpendicular to the axial direction so as to be removably inserted and rotatably attached.

According to a fourth aspect of the present invention, in the keyboard instrument according to the third aspect, the transmission fitting portion of the transmission member is formed with a fitting hole into which the transmission holding shaft is fitted at the center thereof. The keyboard instrument is characterized in that an insertion port through which the transmission holding shaft is removably inserted is formed in a part of the periphery of the fitting hole.

  According to a fifth aspect of the present invention, in the keyboard instrument according to the third or fourth aspect of the present invention, the transmission holding portion is provided with a guide portion that prevents lateral vibration of the transmission member. It is a keyboard instrument.

  The invention according to claim 6 is the keyboard musical instrument according to claim 2, wherein each of the plurality of hammer holding portions of the hammer holding member has a hammer holding shaft, and the hammer member is attached to each of the hammer holding shafts. A keyboard instrument characterized by having a hammer fitting portion that is removably inserted and removably inserted from a direction orthogonal to the axial direction.

  According to a seventh aspect of the present invention, in the keyboard instrument according to the sixth aspect, the hammer fitting portion of the hammer member is formed with a fitting hole into which the hammer holding shaft is fitted at the center thereof. The keyboard instrument is characterized in that an insertion port through which the hammer holding shaft is removably inserted is formed in a part of the periphery of the fitting hole.

  The invention according to claim 8 is the keyboard instrument according to claim 6 or 7, wherein the hammer holding portion is provided with a guide portion for preventing lateral movement of the hammer member. It is a keyboard instrument.

  The invention according to claim 9 is the keyboard instrument according to any one of claims 1 to 8, wherein the transmission support rail is disposed along the arrangement direction of the keys and the transmission holding member is attached, A keyboard instrument comprising: a hammer support rail disposed along a key arrangement direction to which the hammer holding member is attached.

  According to a tenth aspect of the present invention, in the keyboard instrument according to the ninth aspect, the keyboard instrument is disposed at a plurality of predetermined positions in the entire length in the key arrangement direction, and supports the transmission support rail and the hammer support rail. A keyboard instrument comprising a plurality of support members.

  According to an eleventh aspect of the present invention, there are provided a plurality of keys, a plurality of transmission members which are provided corresponding to the plurality of keys and rotate upward in response to a key pressing operation on the corresponding keys, and the plurality of keys. A hammer member which is provided corresponding to each of the keys, and applies an action weight to the corresponding key by rotating upward in response to an upward rotation operation of the transmission member corresponding to the key; A keyboard having a plurality of switch portions provided corresponding to each of the plurality of hammer members and generating an ON signal for generating a musical sound by being pressed in response to a rotation operation of the hammer members. It is a musical instrument.

  According to a twelfth aspect of the present invention, in the keyboard musical instrument according to the eleventh aspect, the plurality of switch portions include a plurality of contact portions, and each of the plurality of contact portions responds to a rotation operation of the hammer member. It is a keyboard instrument that turns on with time difference.

  The invention according to claim 13 is the keyboard musical instrument according to claim 12, wherein each of the switch portions has a rubber sheet that is long in the arrangement direction of the plurality of keys and an inverted dome-shaped bulge portion that is the plurality of hammer members. A keyboard instrument having a rubber switch formed corresponding to each of the above and a switch board on which the rubber switch is provided on the lower surface.

  According to a fourteenth aspect of the present invention, in the keyboard instrument according to the twelfth aspect of the present invention, the keyboard instrument further includes a base member provided in the keyboard instrument and a predetermined total length in the arrangement direction of the plurality of keys. A plurality of support members that are erected on the base member in a state of being located at a plurality of locations, and a long plate having a length that extends over the entire length in the arrangement direction of the plurality of keys. A pair of board rails attached to each of the support members, and the switch board is a keyboard instrument disposed above the pair of hammer members by the pair of board rails.

According to a fifteenth aspect of the present invention, the plurality of keys arranged on the base member provided in the musical instrument case and the plurality of positions between the plurality of keys are mounted upright on the base member. A plurality of support members, a plurality of transmission members that are provided corresponding to the plurality of keys, and that rotate upward in response to a key pressing operation on the corresponding keys, and correspond to the plurality of keys, respectively. A hammer member that applies an action load to the corresponding key by rotating upward in response to an upward rotation operation of the transmission member corresponding to the key; and the plurality of support members A hammer support rail attached to each of the plurality of hammer holding members along the arrangement direction of the plurality of keys;
A keyboard instrument having a plurality of switch portions provided corresponding to each of the plurality of hammer members and outputting an ON signal for generating a musical tone by being pressed in response to a rotation operation of the hammer members. It is.

  According to a sixteenth aspect of the present invention, in the keyboard instrument according to the fifteenth aspect, the transmission is further attached to each of the plurality of support members, and the plurality of transmission holding members are attached along the arrangement direction of the plurality of keys. A keyboard instrument having a member support rail.

  According to a seventeenth aspect of the present invention, in the keyboard instrument according to the fifteenth or sixteenth aspect, the plurality of keys have a length that extends over the entire length in the arrangement direction of the plurality of keys, and are attached to the plurality of support members, respectively. A keyboard instrument having a switch rail in which each of the plurality of switch portions is arranged corresponding to each member.

  The invention according to claim 18 is the keyboard musical instrument according to any one of claims 15 to 17, further provided corresponding to each of the plurality of hammer members, wherein the upper and lower limit positions of each of the plurality of hammer members are regulated. A plurality of stopper members and a length extending over the entire length of the plurality of keys in the arrangement direction and attached to each of the plurality of support members, and the plurality of stopper members are arranged corresponding to the plurality of hammer members, respectively. A keyboard instrument having a stopper rail.

  According to a nineteenth aspect of the present invention, in the keyboard instrument according to the eighteenth aspect, each of the plurality of stopper members includes an upper limit stopper member that regulates an upper limit position of the corresponding plurality of hammer members, and the plurality of the stopper members. A keyboard instrument having a lower limit stopper member for regulating a lower limit position of each hammer member.

  The invention according to claim 20 is the keyboard instrument according to claim 19, wherein the stopper rail has an upper limit stopper rail and a lower limit stopper rail, and each of the plurality of upper limit stopper members is a lower portion of the upper limit stopper rail. Each of the plurality of lower limit stopper members is a keyboard instrument attached to a lower portion of the lower limit stopper rail.

  According to a twenty-first aspect of the present invention, in the keyboard instrument according to the fifteenth aspect, each of the plurality of support members is integrally formed on the base member and an attachment portion attached to the base member. And a bridge portion configured to be disposed between rear portions of the plurality of keys in a state of protruding above the keys.

  According to a twenty-second aspect of the present invention, in the keyboard instrument according to the twenty-first aspect, a rear rail support portion that supports the transmission support rail is provided at a lower rear end portion of the bridge portion, and an upper front portion of the bridge portion. The keyboard instrument is provided with a front rail support portion for supporting the hammer support rail.

DESCRIPTION OF SYMBOLS 1 Keyboard apparatus 2 Key 3 Action mechanism 10 Transmission member 11 Hammer member 12 Transmission holding member 13 Transmission holding part 14 Hammer holding member 15 Hammer holding part 17 Transmission support rail 18 Hammer support rail 20 Support member 22 Shaft support part 22a Guide wall 24 Transmission Holding shaft 24a Notch portion 26 Transmission fitting portion 26b Fitting hole 26c Insertion port 26d Slit groove 31 Hammer projection portion 32 Shaft support portion 32a Guide wall 34 Hammer holding shaft 34a Notch portion 35 Hammer portion 36 Hammer arm 37 Hammer fitting Part 37b fitting hole 37c insertion slot 37d slit groove 38 lower limit stopper 41 upper limit stopper 43 switch board 45 rubber switch

Claims (22)

Multiple keys,
A plurality of transmission members provided corresponding to each of the plurality of keys and displaced in response to a key pressing operation of each of the plurality of keys;
A plurality of members that are provided corresponding to each of the plurality of transmission members and that apply an action load to the key that is being depressed by rotating according to the displacement of the transmission member corresponding to the key depression operation. A hammer member of
A transmission holding member in which a plurality of transmission holding portions for holding the plurality of transmission members are integrally formed along the key arrangement direction;
A keyboard instrument characterized by comprising Multiple keys,
A plurality of transmission members provided corresponding to each of the plurality of keys and displaced in response to a key pressing operation of each of the plurality of keys;
A plurality of members that are provided corresponding to each of the plurality of transmission members and that apply an action load to the key that is being depressed by rotating according to the displacement of the transmission member corresponding to the key depression operation. A hammer member of
A hammer holding member in which a plurality of hammer holding portions for holding each of the plurality of hammer members rotatably is integrally formed along the arrangement direction of the keys;
A keyboard instrument characterized by comprising   2. The keyboard instrument according to claim 1, wherein each of the plurality of transmission holding portions of the transmission holding member has a transmission holding shaft, and the transmission member extends from a direction substantially orthogonal to the axial direction of each of the transmission holding shafts. A keyboard instrument comprising a transmission fitting portion that is removably inserted and removably attached.   4. The keyboard instrument according to claim 3, wherein the transmission fitting portion of the transmission member is formed with a fitting hole into which the transmission holding shaft is fitted at a central portion thereof, and a part around the fitting hole. A keyboard instrument, wherein an insertion port is formed through which the transmission holding shaft is removably inserted.   5. The keyboard instrument according to claim 3, wherein each of the transmission holding portions is provided with a guide portion for preventing lateral vibration of the transmission member.   3. The keyboard instrument according to claim 2, wherein each of the plurality of hammer holding portions of the hammer holding member has a hammer holding shaft, and the hammer member extends from the direction substantially orthogonal to the axial direction of each of the hammer holding shafts. A keyboard instrument comprising a hammer fitting portion that is removably inserted and removably attached.   The keyboard instrument according to claim 6, wherein the hammer fitting portion of the hammer member is formed with a fitting hole into which the hammer holding shaft is fitted at a central portion thereof, and a part around the fitting hole. A keyboard instrument, wherein an insertion port through which the hammer holding shaft is removably inserted is formed.   The keyboard instrument according to claim 6 or 7, wherein the hammer holding portion is provided with a guide portion for preventing lateral movement of the hammer member.   The keyboard instrument according to any one of claims 1 to 8, wherein the transmission support rail is disposed along the arrangement direction of the keys and to which the transmission holding member is attached, and is disposed along the arrangement direction of the keys. And a hammer support rail to which the hammer holding member is attached.   10. The keyboard instrument according to claim 9, further comprising a plurality of support members arranged at a plurality of predetermined positions in the entire length in the arrangement direction of the keys, and supporting the transmission support rail and the hammer support rail. A keyboard instrument characterized by Multiple keys,
A plurality of transmission members provided corresponding to each of the plurality of keys and rotating upward in response to a key pressing operation on the corresponding key;
A hammer that is provided corresponding to each of the plurality of keys and that applies an action weight to the corresponding key by rotating upward in response to an upward rotation operation of the transmission member corresponding to the key. Members,
A plurality of switch portions that are provided corresponding to each of the plurality of hammer members, and that are pressed in response to the rotation operation of the hammer members to output an on signal for generating a musical sound;
Keyboard instrument with 12. The keyboard instrument according to claim 11, wherein the plurality of switch parts have a plurality of contact parts, and each of the plurality of contacts is sequentially turned on with a time difference in response to the rotation operation of the hammer member. .   13. The keyboard instrument according to claim 12, wherein each of the switch portions includes a rubber sheet formed in a rubber sheet that is long in the arrangement direction of the plurality of keys, and an inverted dome-shaped bulge portion formed corresponding to each of the plurality of hammer members. A keyboard instrument comprising: a switch; and a switch board provided with the rubber switch on a lower surface. The keyboard instrument according to claim 12, wherein the keyboard instrument further includes:
A base member provided in the keyboard instrument;
A plurality of support members that are erected and mounted on the base member in a state where they are located at a plurality of predetermined positions in the overall length in the arrangement direction of the plurality of keys;
A pair of board rails formed in a long plate shape having a length over the entire length of the plurality of keys in the arrangement direction, and attached to each of the plurality of support members;
The switch board is a keyboard instrument that is arranged above the pair of hammer members by the pair of board rails. A plurality of keys arranged on a base member provided in the instrument case;
A plurality of support members mounted upright on the base member at a plurality of positions between the plurality of keys;
A plurality of transmission members provided corresponding to each of the plurality of keys and rotating upward in response to a key pressing operation on the corresponding key;
A hammer that is provided corresponding to each of the plurality of keys and that applies an action weight to the corresponding key by rotating upward in response to an upward rotation operation of the transmission member corresponding to the key. Members,
A hammer support rail attached to each of the plurality of support members, wherein the plurality of hammer holding members are attached along an arrangement direction of the plurality of keys;
A plurality of switch portions that are provided corresponding to each of the plurality of hammer members, and that are pressed in response to the rotation operation of the hammer members to output an on signal for generating a musical sound;
Keyboard instrument with The keyboard instrument according to claim 15, further comprising a transmission member support rail attached to each of the plurality of support members, wherein the plurality of transmission holding members are attached along an arrangement direction of the plurality of keys.   The keyboard instrument according to claim 15 or 16, further comprising a length extending over the entire length of the plurality of keys in the arrangement direction, attached to each of the plurality of support members, and corresponding to each of the plurality of hammer members. A keyboard instrument having a switch rail in which each of the switch sections is arranged. The keyboard instrument according to any one of claims 15 to 17, further comprising a plurality of stopper members provided corresponding to each of the plurality of hammer members and restricting upper and lower limit positions of each of the plurality of hammer members,
A stopper rail having a length over the entire length in the arrangement direction of the plurality of keys and attached to each of the plurality of support members, and the plurality of stopper members arranged corresponding to the plurality of hammer members,
Keyboard instrument with The keyboard instrument according to claim 18, wherein each of the plurality of stopper members regulates an upper limit stopper member that regulates an upper limit position of each of the corresponding hammer members, and a lower limit position of each of the plurality of hammer members. And a lower limit stopper member.   The keyboard instrument according to claim 19, wherein the stopper rail includes an upper limit stopper rail and a lower limit stopper rail, each of the plurality of upper limit stopper members being attached to a lower portion of the upper limit stopper rail, and the plurality of lower limit stopper rails. Each of the stopper members is a keyboard instrument attached to the lower part of the lower limit stopper rail.   16. The keyboard instrument according to claim 15, wherein each of the plurality of support members is formed integrally with an attachment portion attached on the base member, and protrudes above the plurality of keys. A keyboard instrument having a bridge portion configured to be disposed between rear portions of the plurality of keys. The keyboard instrument according to claim 21, wherein a rear rail support portion for supporting the transmission support rail is provided at a lower rear end portion of the bridge portion, and the hammer support rail is supported at a front upper portion of the bridge portion. A keyboard instrument with a front rail support.

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