JP6066367B2 - Keyboard device and keyboard instrument - Google Patents

Description

  The present invention relates to a keyboard device used for a keyboard instrument such as a piano and a keyboard instrument including the keyboard device.

  For example, in a keyboard device such as a piano, as described in Patent Document 1, a wiper that rotates by pressing a key, a jack that is driven in accordance with the rotation of the wiper, and a drive that is driven by this 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

  This type of keyboard device has a configuration in which a hammer member is driven by a jack that is driven in accordance with a rotating operation of a whipen by a key pressing operation to hit a string. Before hitting, the upper limit stopper member of the silencer for stopping the operation of the hammer member is provided.

  The upper limit stopper member of such a keyboard device is constructed such that a single support shaft is installed over the entire length in the arrangement direction of a plurality of keys above the hammer member, and a plurality of arms corresponding to each of the plurality of keys on the support shaft. When the cushioning material that the plurality of hammer members come into contact with and separate from each other is delivered to the plurality of arm portions and the sound is silenced, the support shaft can be rotated to allow the plurality of hammer members to come into contact with each other. The cushion material is arranged at the position.

  However, in such a keyboard device, when the key is struck when performing silencing, since the hammer member strongly contacts the cushion material of the upper limit stopper member, the support shaft of the upper limit stopper member bends and vibrates. There is a problem that abnormal noise is generated by vibration.

  The problem to be solved by the present invention is to provide a keyboard device that can prevent vibration of the upper limit stopper rail and prevent generation of abnormal noise due to the vibration, and a keyboard instrument including the keyboard device.

The present invention includes a plurality of keys, an action mechanism provided corresponding to each of the plurality of keys, and a support member that supports the action mechanism, and the action mechanism is used for a key pressing operation of the key. A hammer member that applies an action load to the key that is operated by pressing the key, and an upper limit stopper that is attached to the support member and regulates the upper limit position of the operation range of the hammer member is attached. An upper limit stopper mounting member and a vibration preventing member for preventing vibration of the upper limit stopper mounting member, and the support member includes a first surface portion and a second surface portion different from the first surface portion. And the second surface portion is provided with an engaging protrusion that protrudes in a direction different from the direction in which the hammer member abuts on the upper limit stopper. It has a hole, so that the engagement hole in the second surface with attached with screws to the first surface portion of the support member is engaged with the engaging projection, it has become bent shape A keyboard device characterized by the above.

  According to this invention, when the hammer member comes into contact with the upper limit stopper and the upper limit stopper mounting member receives an impact, the vibration preventing member can prevent the upper limit stopper mounting member from vibrating due to the impact. The generation of abnormal noise due to the vibration of the upper limit stopper mounting member can be reliably prevented.

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 expanded sectional view in the AA arrow of the keyboard apparatus shown by FIG. It is sectional drawing which expanded and showed the principal part in the keyboard apparatus shown by FIG. 3A and 3B show a part of each of the transmission member and the transmission holding member shown in FIG. 3, wherein FIG. 3A is an enlarged plan view thereof, and FIG. The transmission member shown by FIG. 3 is shown, (a) is the enlarged side view, (b) is the expanded sectional view in the CC arrow. 3A and 3B show a part of the hammer member and the hammer holding member shown in FIG. 3, wherein FIG. 3A is an enlarged plan view thereof, and FIG. 3B is an enlarged cross-sectional view of a main part taken along the line DD. 3 shows the hammer member shown in FIG. 3, (a) is an enlarged side view of the hammer member with respect to the white key, (b) is an enlarged plan view thereof, (c) is an enlarged side view of the hammer member with respect to the black key, (d ) Is an enlarged plan view thereof. 3 shows the interlocking control unit shown in FIG. 3, (a) is an enlarged cross-sectional view taken along the line EE, (b) is an enlarged side view showing the interlocking projection, and (c) is the interlocking projection. It is the expanded side view which decomposed | disassembled and showed. FIG. 4 is an enlarged cross-sectional view of a main part showing a state when a key is pressed in the keyboard device shown in FIG. 3. It is an expanded sectional view of the principal part which showed the supporting member and upper limit stopper rail in the keyboard apparatus shown by FIG.

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 plate 5 in this state. ing. That is, the white key 2a and the black key 2b are different in length in the front-rear direction, and the length of the white key 2a is longer than the length of the black key 2b.

  Along with this, as shown in FIG. 2, on the base plate 5, 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 detachable. Are provided along the arrangement direction of the keys 2. Also, on the base plate 5, cushion materials 7 are 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.

  Thereby, as shown in FIG. 2, the key strokes of the plurality of keys 2 are set by the cushion members 6a and 6b on the front side and the cushion material 7 on the rear side. Further, guide pins 8a and 8b are provided on the base plate 5 so as to stand upright to prevent the plurality of keys 2 from swinging in the arrangement direction.

  As shown in FIGS. 1 to 3, 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 rotation operation of the plurality of transmission members 10. 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 this case, the plurality of keys 2 are rotated counterclockwise around the balance pins 4a and 4b by the respective weights of the plurality of transmission members 10, and each key 2 is pushed up to an initial position, and each key 2 is initialized. It is comprised so that a load may be provided.

  In addition, as shown in FIGS. 2 and 3, the action mechanism 3 holds a plurality of transmission holding members 12 that rotatably hold a plurality of transmission members 10 and a plurality of hammer members 11 respectively. A plurality of hammer holding members 13. The plurality of transmission holding members 12 are mounted on transmission support rails 14 arranged along the arrangement direction of the keys 2. The plurality of hammer holding members 13 are attached on hammer support rails 15 arranged along the arrangement direction of the keys 2. The transmission support rail 14 and the hammer support rail 15 are supported by a plurality of support members 16 and arranged above the plurality of keys 2.

  As shown in FIGS. 1 to 3, the plurality of support members 16 are erected and mounted on the base plate 5 in a state where the plurality of support members 16 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 16 are arranged at both ends in the arrangement direction of the plurality of keys 2 and between, for example, each of the three keys 2 positioned for every 20 keys 2. . In other words, in this embodiment, the support members 16 are arranged at five positions along the entire length in the arrangement direction of the keys 2.

  The support member 16 is made of a hard synthetic resin such as ABS resin, and as shown in FIGS. 2 and 3, the support member 16 is integrally formed on the attachment portion 16 a attached to the base plate 5 and the attachment portion 16 a. And a bridge portion 16b. Accordingly, the support member 16 is configured to be disposed between the rear portions of the plurality of keys 2 in a state where the bridge portion 16b protrudes above the key 2 by mounting the mounting portion 16a on the base plate 5. Has been.

  In this case, as shown in FIGS. 2 and 3, the rear rail support for supporting the transmission support rail 14 is provided at the rear end lower portion of the bridge portion 16b, that is, the rear upper portion (left upper portion in FIG. 2). A portion 16c is provided. Further, a front rail support portion 16d that supports the hammer support rail 15 is provided on the front upper portion (the upper right portion in FIG. 2) of the bridge portion 16b. Further, a stopper rail support portion 16e is provided on the upper rear side of the bridge portion 16b (the upper left portion in FIG. 2), and a substrate rail support portion 16f is provided on the upper portion of the bridge portion 16b.

  As shown in FIGS. 2 and 3, the transmission support rail 14 is formed in a shape in which both side portions of the belt plate are bent downward along the longitudinal direction thereof, and has a total length in the arrangement direction of the plurality of keys 2. It is formed in a length. The transmission support rail 14 is configured such that a predetermined portion in the arrangement direction of the keys 2 is attached on each rear rail support portion 16 c of the plurality of support members 16.

  As shown in FIGS. 2 and 3, a plurality of transmission holding members 12 and a plurality of stopper support portions 17 are attached on the transmission support rail 14 along the arrangement direction of the keys 2. In this case, the plurality of stopper support portions 17 are made of metal plates, and are attached to five locations on the transmission support rail 14 corresponding to the plurality of support members 16 in a state of protruding above the plurality of transmission holding members 12. Yes.

  The transmission holding member 12 is made of a hard synthetic resin such as ABS resin. As shown in FIG. 4A and FIG. 4B, the plurality of shaft support portions 18 are, for example, about 10 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 shaft support portion 18 is configured such that the transmission member 10 is rotatably attached to prevent the transmission member 10 from being laterally touched.

  That is, as shown in FIGS. 4A and 4B, the shaft support portion 18 has a pair of guide walls 20 and a transmission holding shaft 21 formed between the pair of guide walls 20. doing. The pair of guide walls 20 are formed at the rear end portion (the left end portion in FIG. 4A) on the main body plate 12 a of the transmission holding member 12 so as to correspond to each of the plurality of transmission members 10.

  As shown in FIG. 4A, the pair of guide walls 20 are configured such that the transmission fitting portion 23 of the transmission member 10 is slidably sandwiched from both sides of a transmission fitting portion 23 described later of the transmission member 10. The guide part which guides so that rotation is possible is comprised. As shown in FIG. 4B, the transmission holding shaft 21 has a substantially round bar shape, and the outer peripheral surface thereof is notched so that the cross-sectional shape is noncircular.

  Further, as shown in FIGS. 2 to 4, the transmission holding member 12 has a regulating portion 19 that regulates the lateral contact of the transmission member 10 during packaging transportation. The restricting portion 19 is a pair of restricting walls formed on the front portion (the right side portion in FIG. 4A) of the main body plate 12 a of the transmission holding member 12 so as to correspond to the respective transmitting members 10. This restricting portion 19 is configured to guide the transmission member 10 in a state where the rear lower portion of the transmission member 10 is sandwiched, and to regulate the lateral deflection of the transmission member 10 during packaging transportation.

  The transmission member 10 is made of a hard synthetic resin such as ABS resin, and as shown in FIGS. 2 to 5, the hammer member 11 is rotated in the vertical direction by rotating in the vertical direction according to the key pressing operation of the key 2. The transmission main body 22 includes a transmission fitting portion 23 that is integrally formed with the transmission main body 22 and is rotatably attached to the transmission holding shaft 21 of the transmission holding member 12.

  As shown in FIGS. 2, 3, and 5, the transmission main body 22 is formed in a substantially waffle shape. That is, as shown in FIG. 5, the transmission main body portion 22 includes a thin vertical plate portion 22a and a plurality of rib portions 22b formed in a substantially lattice shape on the outer peripheral portion and both side surfaces of the vertical plate portion 22a. These are formed in a waffle shape. In this case, the transmission main body portion 22 is configured such that the weight of the transmission member 10 is adjusted by the shape and thickness of the vertical plate portion 22a and the formation density of the plurality of rib portions 22b.

  For example, as shown in FIGS. 5 (a) and 5 (b), the plurality of rib portions 22b are provided in a substantially lattice shape on both side surfaces of the vertical plate portion 22a. A plurality of finer rib portions 22c are provided in the lattice of the portions. That is, the plurality of fine rib portions 22c are arranged in the two lattices located below the central portion of the vertical plate portion 22a and in the lattice of the front end portion located in front of the central portion of the vertical plate portion 22a. And is provided.

  As a result, the weight of the transmission member 10 is set according to the shape and thickness of the vertical plate portion 22a of the transmission main body portion 22 and the formation density of the plurality of rib portions 22b and 22c, as shown in FIG. Yes. Further, the transmission member 10 has a center of gravity position of the transmission member 10 depending on a formation state of the plurality of rib portions 22b and 22c, that is, a formation position of the plurality of fine rib portions 22c provided in a part of the plurality of rib portions 22b. G is set at a position shifted from the center of the transmission main body 22.

  Further, when the transmission member 10 is formed of a synthetic resin, the strength is ensured by the plurality of rib portions 22b and 22c even when the vertical plate portion 22a of the transmission main body portion 22 is thin. In addition, the ribs 22b and 22c are configured to prevent the occurrence of sink marks in the vertical plate portion 22a.

  As shown in FIGS. 2, 3, and 5, the transmission fitting portion 23 is formed in an inverted C shape as a whole and protrudes rearward from the rear end portion of the transmission main body portion 22. That is, as shown in FIG. 4A, the transmission fitting portion 23 is formed so that the thickness of the keys 2 in the arrangement direction is substantially the same as the length between the pair of guide walls 20 of the shaft support portion 18. The slidably inserted between the pair of guide walls 20.

  Further, as shown in FIG. 5A, the transmission fitting portion 23 is formed with a fitting hole 23a into which the transmission holding shaft 21 of the transmission holding member 12 is fitted, and the fitting hole 23a. An insertion opening 23b into which the transmission holding shaft 21 is removably inserted is formed in a part around the fitting hole 23a, that is, in the rear part around the fitting hole 23a, and the transmission holding shaft 21 is inserted into the fitting hole 23a through the insertion opening 23b. By being inserted, it is configured to be rotatably attached to the transmission holding shaft 21.

  In this case, as shown in FIG. 5A, the transmission fitting portion 23 moves the transmission member 10 above the transmission holding shaft 21 when the transmission holding shaft 21 is inserted into the fitting hole 23a through the insertion port 23b. When the insertion port 23 b is pressed into the transmission holding shaft 21 in this state, the insertion port 23 b is the transmission holding shaft 21. The transmission holding shaft 21 is configured to be inserted and fitted into the fitting hole 23a by being slightly expanded.

  By the way, as shown in FIGS. 2 to 5, a thin engaging portion 24 that is regulated by the regulating portion 19 of the transmission holding member 12 is provided in the lower rear portion of the transmission main body portion 22 of the transmission member 10. ing. As shown in FIGS. 4 and 5, the engaging portion 24 has both side surfaces of the rear lower portion of the transmission main body portion 22 cut away.

  For this reason, as shown in FIGS. 4 and 5, the engaging portion 24 has a thickness that is substantially the same as that between the pair of restricting walls of the restricting portion 19. Thereby, the engaging part 24 is inserted between the pair of restricting walls of the restricting part 19 so as to guide the transmission member 10 so as to be rotatable, and to regulate the lateral deflection of the transmitting member 10 during packaging transportation. It is configured.

  Further, the transmission main body portion 22 of the transmission member 10 is formed such that a lower portion thereof protrudes toward the upper surface of the key 2 as shown in FIGS. A transmission felt 25 is provided at the lower end of the transmission main body 22. The transmission felt 25 is configured such that a capstan 26 provided on the upper rear side of the key 2 abuts from below.

  Accordingly, as shown in FIGS. 2 and 3, when the key 2 is depressed, the transmission member 10 is pushed up by the capstan 26 of the key 2 that contacts the transmission felt 25 from the lower side, thereby transmitting and holding the key. It is configured to rotate counterclockwise about the shaft 21. Further, the transmission main body portion 22 of the transmission member 10 is formed such that the front end upper portion is formed higher than the rear end upper portion, and the upper side portion is inclined downward (lower left in FIG. 2).

  As shown in FIGS. 2 to 5, a support portion 22 d is provided on the upper front end of the transmission main body 22 so as to protrude upward. That is, the support portion 22d is configured to move in the vertical direction along the side surface of the hammer member 11 without coming into contact with the hammer member 11 described later. Further, an interlocking protrusion 28 of an interlocking control unit 27 described later is provided on the side surface of the support portion 22d.

  On the other hand, as shown in FIGS. 1 to 3, the hammer support rail 15 is formed in a shape in which both side portions of the belt plate are bent downward along the longitudinal direction, like the transmission support rail 14. The key 2 is formed to have a length over the entire length in the arrangement direction. The hammer support rail 15 is configured such that a predetermined portion in the arrangement direction of the keys 2 is attached to each front rail support portion 16 d of the plurality of support members 16. On the hammer support rail 15, a plurality of hammer holding members 13 are attached along the arrangement direction of the keys 2.

  The hammer holding member 13 is made of a hard synthetic resin such as ABS resin. As shown in FIGS. 6 and 7, the shaft support portion 13b is, for example, 10 at the rear end portion of the rail-shaped main body plate 13a opened upward. It is integrally formed along the direction in which the keys 2 are arranged in a state where each of the keys 2 is provided. The shaft support portion 13b is configured such that the hammer member 11 is rotatably attached to prevent the hammer member 11 from sideways.

  That is, as shown in FIGS. 2, 3, 6, and 7, the shaft support portion 13 b includes a pair of guide walls 30, hammer holding shafts 31 formed between the pair of guide walls 30, and have. The pair of guide walls 30 are formed at the rear end portion (the left end portion in FIG. 6B) corresponding to each of the plurality of hammer members 11.

  As shown in FIGS. 6A and 6B, the pair of guide walls 30 is configured such that the hammer member 11 is slidably sandwiched from both sides of a hammer fitting portion 34 described later of the hammer member 11. The hammer fitting portion 34 is configured to rotatably guide the guide portion. As shown in FIG. 6B, the hammer holding shaft 31 has a substantially round bar shape. Like the transmission holding shaft 21, both sides of the outer peripheral surface thereof are notched so that the cross-sectional shape is noncircular. Is formed.

  The hammer member 11 is made of a hard synthetic resin such as ABS resin and has a hammer portion 32 and a hammer arm 33 as shown in FIGS. 6 and 7, and these are integrally formed. . In this case, as shown in FIGS. 7 (a) to 7 (d), the hammer member 11 includes a white key 2a and a black key 2b in the key 2, and a part of the configuration, that is, an upper limit stopper 37 to be described later. The stopper contact portions 43a and 43b that contact each other are configured to be different.

  As shown in FIGS. 6 and 7, the hammer portion 32 has a lever-shaped vertical plate portion 32 a, and a plurality of rib portions 32 b are formed on the outer peripheral portion and both side surfaces thereof. The hammer portion 32 is configured such that the weight of the hammer member 11 is adjusted by the shape of the insulator-shaped vertical plate portion 32a and the formation density of the plurality of rib portions 32b.

  As shown in FIGS. 6 and 7, the hammer arm 33 has a horizontal plate portion 33a having a length in the front-rear direction that is substantially the same as that of the transmission member 10, and rib portions 33b are formed on the outer peripheral portion and both side surfaces thereof. It has been configured. A hammer fitting portion 34 that is rotatably attached to the hammer holding member 13 is formed at the front end portion (right end portion in FIG. 7) of the hammer arm 33.

  As shown in FIG. 7, the hammer fitting portion 34 is formed in a C shape as a whole like the transmission fitting portion 23, and is formed to protrude forward from the front end portion of the hammer arm 33. That is, as shown in FIG. 6A, the hammer fitting portion 34 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 30. It is comprised so that it may be slidably inserted in.

  Further, as shown in FIG. 7, the hammer fitting portion 34 is formed with a fitting hole 34a for fitting the hammer holding shaft 31 of the hammer holding member 13 at the center thereof, and one around the fitting hole 34a. An insertion port 34b into which the hammer holding shaft 31 is removably inserted is formed in the front portion around the fitting hole 34a, and the hammer holding shaft 31 is inserted into the fitting hole 34a through the insertion port 34b. Thus, the hammer holding shaft 31 is configured to be rotatably attached.

  In this case, as shown in FIG. 7, when the hammer holding shaft 31 is inserted into the fitting hole 34a through the insertion port 34b, the hammer fitting portion 34 moves the hammer holding member 13 forward of the hammer member 11 (FIG. 7). In this state, the insertion port 34b is made to correspond to the portions where both sides of the hammer holding shaft 31 are cut out, and when the insertion port 34b is press-fitted into the hammer holding shaft 31 in this state, The hammer holding shaft 31 is configured to be inserted and fitted into the fitting hole 34a by being slightly pushed and spread by the hammer holding shaft 31.

  That is, as shown in FIG. 3, the hammer holding member 13 is connected to the transmission member 10 by an interlock control unit 27 described later before the hammer member 11 is attached, so that the hammer fitting portion 34 in FIG. In order to make the insertion port 34b correspond to the hammer holding shaft 31, the hammer holding member 13 is tilted rearward and the hammer holding shaft 31 is inserted into the fitting hole 34a and fitted in this state. 15 is configured to be mounted on.

  Further, as shown in FIGS. 3 and 8, a mounting portion 33c is provided at the lower front end of the hammer arm 33 so as to protrude downward. That is, the attachment portion 33c is configured to face the side surface of the support portion 22d of the transmission member 10 and to move in the vertical direction along the side surface of the support portion 22d in this state. Further, the mounting portion 33c is provided with a guide hole 29 for guiding an interlocking protrusion 28 of the interlocking control portion 27 described later.

  Further, as shown in FIGS. 2 and 3, the hammer arm 33 is configured to be regulated to the lower limit position, which is the initial position, when the lower end of the hammer arm 33 comes into contact with the lower limit stopper 35 from above. That is, the lower limit stopper 35 is formed of a cushion material such as felt.

  As shown in FIGS. 2 and 3, the lower limit stopper 35 is attached on a lower limit stopper rail 36 supported by a plurality of stopper support portions 17 provided on the transmission support rail 14. As a result, the hammer member 11 is configured to be regulated to the initial position in a state where the lower end of the rear end of the hammer arm 33 is in contact with the lower limit stopper 35 from the upper side and is inclined downward.

  Further, as shown in FIGS. 7 and 9, the hammer arm 33 has a key stroke setting portion 43 provided at the upper rear end of the hammer arm 33 as an upper limit stopper 37 when the key 2 is depressed. By abutting from below, the upper limit position is regulated. As with the lower limit stopper 35, the upper limit stopper 37 is formed of a cushion material such as felt and is attached to the lower surface of the upper limit stopper rail 38 attached to each stopper rail support portion 16e of the plurality of support members 16.

  Accordingly, as shown in FIG. 9, the hammer member 11 is provided at the upper rear end of the hammer arm 33 when the hammer arm 33 rotates clockwise around the hammer holding shaft 31 of the hammer holding member 13. The key stroke setting portion 43 is configured to be in contact with the upper limit stopper 37 from below so that the upper limit position is regulated.

  As shown in FIGS. 3 and 9, the key stroke setting unit 43 is configured to set the key stroke of the key 2 by setting the distance between the hammer arm 33 and the upper limit stopper 37. In this case, as shown in FIG. 2, the white key 2a and the black key 2b have different lengths in the front-rear direction, and the length of the white key 2a is longer than the length of the black key 2b.

  For this reason, each key stroke of the white key 2a and the black key 2b is adjusted by the cushion members 6a, 6b on the front side and the cushion material 7 on the rear side, but the white key 2a pushes up the transmission member 10 And the length by which the black key 2b pushes up the transmission member 10 is different. That is, when the hammer member 11 corresponding to the white key 2a rotates around the hammer holding shaft 31 of the hammer holding member 13, the amount of rotation (that is, the rotation angle) is the rotation of the hammer member 11 corresponding to the black key 2b. Less than the amount (ie rotation angle).

  Accordingly, the key stroke setting portion 43 of the hammer member 11 corresponding to the white key 2a is provided on the hammer member 11 corresponding to the white key 2a as shown in FIGS. 7 (a) to 7 (d). The white key stopper abutting portion 43a and the black key stopper abutting portion 43b provided on the hammer member 11 corresponding to the black key 2b, and thereby the hammer member 11 corresponding to the white key 2a. And the hammer member 11 corresponding to the black key 2b are configured to contact the upper limit stopper 37 with the same rotation amount (that is, the same rotation angle).

  Therefore, as shown in FIG. 7A, the white key stopper abutting portion 43a has a height protruding according to the key stroke of the white key 2a, for example, substantially the same height as the upper surface of the hammer arm 33. Is formed. Further, as shown in FIG. 7C, the black key stopper abutting portion 43b is formed with a height protruding according to the key stroke of the black key 2b, for example, a height protruding from the upper surface of the hammer arm 33. Has been.

  By the way, as shown in FIGS. 2 and 3, each upper limit stopper rail mounting portion 16 e provided on each of the plurality of support members 16 protrudes upward and rearward from the support member 16 located above the rear portion of the hammer arm 33. Is provided. That is, as shown in FIG. 10, the upper limit stopper rail mounting portion 16e includes an inclined portion 44a that is inclined from the upper portion of the rear end of the bridge portion 16b of the support member 16 toward the upper rear portion, and the rear end of the inclined portion 44a. It has a vertical portion 44b extending vertically upward from the upper portion, and an upper surface portion 44c extending horizontally from the upper end of the vertical portion 44b toward the front side.

  Further, as shown in FIG. 10, the upper limit stopper rail 38 is formed by bending a metal band plate into a substantially inverted Z shape in cross section, and is disposed over the entire length in the arrangement direction of the plurality of keys 2. . That is, the upper limit stopper rail 38 includes a rail body portion 45 that is arranged to project rearward from the vertical portion 44b of the upper limit stopper rail mounting portion 16e of the support member 16, and a vertical portion 44b of the upper limit stopper rail mounting portion 16e. And a rail main body attaching portion 46 attached to the upper surface portion 44c.

  As shown in FIG. 10, the rail main body 45 has a structure in which the vertical portions 45b are formed on both sides of the horizontal portion 45a to increase the rigidity, and the upper limit stopper 37 is provided on the lower surface of the horizontal portion 45a. ing. Further, the rail body mounting portion 46 includes a vertical portion 46a disposed on the vertical portion 44b of the upper limit stopper rail mounting portion 16e and a horizontal portion 46b disposed on the upper surface portion 44c of the upper limit stopper rail mounting portion 16e. ing.

  Further, as shown in FIG. 10, a rail main body attaching portion 46 of the upper limit stopper rail 38 is attached to the upper limit stopper rail attaching portion 16 e by a strength reinforcing portion 47. That is, as shown in FIG. 10, the strength reinforcing portion 47 is rearward in a direction (horizontal direction) perpendicular to the contact direction (vertical direction) of the hammer arm 33 with the vertical portion 44b of the upper limit stopper rail mounting portion 16e. An engagement protrusion 47a provided to protrude to the left (in FIG. 10, left side), and an engagement hole 47b provided on the vertical portion 46a of the rail body attachment portion 46 to be engaged with the engagement protrusion 47a. ing.

  For this reason, as shown in FIG. 10, the strength reinforcing portion 47 is engaged with the engagement protrusion 47a of the upper limit stopper rail mounting portion 16e inserted into the engagement hole 47b of the rail main body mounting portion 46. The rail main body mounting portion 46 is configured to secure the mounting strength with respect to the upper limit stopper rail mounting portion 16e. Thereby, as shown in FIG. 9, when the hammer arm 33 comes into contact with the upper limit stopper 37 of the upper limit stopper rail 38 from the lower side, the strength reinforcing portion 47 causes the rail main body mounting portion 46 of the upper limit stopper rail 38 to move. It is configured to prevent turning up.

  Further, as shown in FIG. 10, the rail body mounting portion 46 of the upper limit stopper rail 38 has its horizontal portion 46b disposed on the upper surface portion 44c of the upper limit stopper rail mounting portion 16e, and in this state, the horizontal portion 46b becomes the upper limit stopper rail. It is configured to be fixed to the upper surface portion 44c of the mounting portion 16e from above by a plurality of screws 48 that are fastening members. In this case, a screw insertion hole 46 c is provided in the rail body mounting portion 46 of the upper limit stopper rail 38. A plurality of boss portions 44d having screw holes are provided on the upper portion of the upper limit stopper rail mounting portion 16e.

  In this case, a buffer member 49 is provided between the upper limit stopper rail mounting portion 16e and the rail body mounting portion 46, as shown in FIG. The buffer member 49 is a sheet made of a synthetic resin having elasticity such as a low-rebound material, urethane resin, silicone resin, and the like, and is arranged from the vertical portion 44b to the upper surface portion 44c of the upper limit stopper rail mounting portion 16e. It is configured.

  In this case, the buffer member 49 at a location corresponding to the vertical portion 44b of the upper limit stopper rail mounting portion 16e is substantially the same as the engagement hole 47b provided in the vertical portion 46a of the rail body mounting portion 46, as shown in FIG. An opening 49a having the same size is provided. The buffer member 49 at a location corresponding to the upper surface portion 44c of the upper limit stopper rail mounting portion 16e is provided with a plurality of screw insertion holes 49b corresponding to the plurality of boss portions 44d having screw holes.

  Furthermore, as shown in FIG. 10, the inclined portion 44a of the upper limit stopper rail mounting portion 16e and the rear end of the bridge portion 16b of the support member 16 are formed in a curved portion 50 that is gently curved. When the hammer arm 33 comes into contact with the upper limit stopper 37 of the upper limit stopper rail 38 from below, the bending portion 50 disperses the stress due to the impact so that the stress is not concentrated on a part of the bending portion 50. It is configured.

  A plurality of reinforcing ribs 51 are provided radially along the curved portion 50 on both surfaces of the bridge portion 16b of the support member 16 where the curved portion 50 is formed, as shown in FIG. The plurality of reinforcing ribs 51 ensure the strength of the bending portion 50 so that the bending portion 50 is not damaged by an impact when the hammer arm 33 comes into contact with the upper limit stopper 37 of the upper limit stopper rail 38 from below. It is configured.

  In this case, as shown in FIG. 10, the upper limit stopper rail 38 is configured such that vibration is prevented by the vibration preventing member 52. The vibration preventing member 52 is attached to each upper limit stopper rail mounting portion 16e of the plurality of support members 16 in a state of being arranged along the arrangement direction of the keys 2 so as to press the upper limit stopper rail 38 from above. It is configured.

  That is, as shown in FIG. 10, the vibration preventing member 52 includes a vibration preventing pressing portion 52a for pressing the upper surface of the upper limit stopper rail 38 corresponding to the upper limit stopper 37 and a screw 48 on the upper limit stopper rail mounting portion 16e of the support member 16. The vibration prevention attachment part 52b attached by the vibration prevention holding part 52a and the vibration prevention attachment part 52c for connecting the vibration prevention attachment part 52b are provided, and these are arranged over the entire length in the arrangement direction of the keys 2. ing.

  In this case, as shown in FIG. 10, the vibration preventing member 52 is disposed on the horizontal portion 46b of the rail body mounting portion 46 in which the vibration preventing mounting portion 52b is disposed on the upper limit stopper rail mounting portion 16e. A screw 48 is inserted into a screw insertion hole 52d provided in the vibration preventing mounting portion 52b and screwed into a boss portion 44d of the upper limit stopper rail mounting portion 16e through a screw insertion hole 46c of the rail main body mounting portion 46, whereby the upper limit stopper It is configured to be attached together with the upper limit stopper rail 38 to the rail attachment portion 16e.

  Accordingly, as shown in FIG. 10, the vibration preventing member 52 is configured so that the vibration preventing presser portion 52a becomes the rail main body portion of the upper limit stopper rail 38 when the vibration preventing mounting portion 52b is attached on the upper limit stopper rail attaching portion 16e. In the horizontal portion 45a of 45, the upper surface of the portion corresponding to the upper limit stopper 37 is pressed from above to prevent vibration of the upper limit stopper rail 38.

  In this case, a first vibration absorbing member 53 is provided between the vibration preventing pressing portion 52a of the vibration preventing member 52 and the rail main body portion 45 of the upper limit stopper rail 38 as shown in FIG. The first vibration absorbing member 53 is a synthetic material having elasticity such as a low-rebound material, urethane resin, silicone resin, etc., like the buffer member 49 provided between the upper limit stopper rail mounting portion 16e and the rail body mounting portion 46. It is a sheet made of resin.

  Further, as shown in FIG. 10, a second vibration absorbing member 54 is provided between the vibration preventing mounting portion 52 b of the vibration preventing member 52 and the rail main body mounting portion 46 of the upper limit stopper rail 38. Similarly to the first vibration absorbing member 53, the second vibration absorbing member 54 is a sheet made of a synthetic resin having elasticity such as a low repulsion material, a urethane resin, and a silicone resin. The second vibration absorbing member 54 is provided with a screw insertion hole 54a into which the screw 48 is inserted, corresponding to the screw insertion hole 52d of the vibration preventing mounting portion 52b.

  On the other hand, a switch pressing portion 39 is formed at the upper front end of the hammer arm 33 as shown in FIGS. A switch substrate 40 is disposed by a pair of substrate support rails 41 above the hammer arm 33 corresponding to the switch pressing portion 39. Each of the pair of board support rails 41 is a long plate having an L-shaped cross section, and has a length extending over the entire length of the key 2 in the arrangement direction.

  As shown in FIGS. 1 to 3, the pair of substrate support rails 41 are attached with their horizontal portions spaced apart from each other on the substrate rail support portions 16 f of the plurality of support members 16. The switch board 40 is divided into a plurality of pieces as shown in FIG. In other words, in this embodiment, the switch board 40 is divided into, for example, four parts and is attached on the pair of board support rails 41 with a length corresponding to about 20 keys 2.

  As shown in FIGS. 2 and 9, rubber switches 42 are provided on the lower surfaces of the switch boards 40, respectively. The rubber switch 42 has a structure in which an inverted dome-shaped bulging portion 42 a 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 33. Inside the bulging portion 42 a, a plurality of movable contacts 42 b that come into contact with and separate from a plurality of fixed contacts (not shown) provided on the lower surface of the switch substrate 40 are provided along the front-rear direction of the hammer arm 33. Is provided.

  As a result, as shown in FIG. 9, the rubber switch 42 is rotated clockwise about the hammer holding shaft 31 of the hammer holding member 13 from the lower side by the switch pressing portion 39 of the hammer arm 33. When pressed, the inverted dome-shaped bulged portion 42a is elastically deformed, and the plurality of movable contacts 42b 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. This switch signal is supplied to the sound source unit 40a, and a musical sound corresponding to the key pressing strength of the key 2 is generated.

  By the way, the interlocking control part 27 is provided in the interlocking projection part 28 provided in the support part 22d of the transmission member 10 and the attachment part 33c of the hammer member 11 as shown in FIGS. And a guide hole 29 for guiding. Accordingly, the interlock control unit 27 controls the rotation operation of the hammer member 11 accompanying the rotation operation of the transmission member 10 corresponding to the key 2 that has been pressed by the relative operation of the interlocking protrusion 28 with respect to the guide hole 29. Is configured to do.

  That is, as shown in FIGS. 5 and 8, the interlocking protrusion 28 of the interlocking control unit 27 includes a rod-shaped protrusion main body 28a and a cylindrical buffer portion 28b provided on the outer periphery of the protrusion main body 28a. ing. As shown in FIGS. 8A to 8C, the protrusion main body 28a is formed in a round bar shape.

  As shown in FIGS. 3 to 5, the protrusion main body 28 a is integrated with the front end of the support portion 22 d provided on the transmission main body portion 22 of the transmission member 10 in a state protruding toward the arrangement direction of the keys 2. And is configured to be movably inserted into a guide hole 29 provided in the attachment portion 33c of the hammer member 11. The protrusion main body 28a has a hook portion 28c formed in an annular shape on the outer periphery of the tip.

  The buffer portion 28b is made of a synthetic resin having elasticity such as urethane resin or silicone resin, and is formed in a substantially cylindrical shape as shown in FIGS. 8 (a) to 8 (c). The buffer portion 28b has an inner diameter that is substantially the same as the outer diameter of the projection main body 28a, and an axial length that is the axial length of the projection main body 28a, that is, between the support portion 22d and the hook portion 28c. It is formed to the same length as that between them.

  Further, as shown in FIGS. 8A to 8C, a sliding projection 28d that contacts the support portion 22d is formed in a hook shape at one end of the buffer portion 28b. Thus, when the buffer portion 28b is mounted on the outer periphery of the protrusion main body 28a, the hook-shaped sliding protrusion 28d abuts on the support portion 22d, and the end located on the opposite side is the hook portion 28c of the protrusion main body 28a. By being in contact with each other, it is configured to be attached to the protrusion main body 28a while being sandwiched between the support portion 22d and the hook portion 28c.

  On the other hand, the guide hole 29 of the interlocking control unit 27 is a long hole into which the interlocking protrusion 28 is movably inserted, as shown in FIGS. 3, 8 (a) and 9, and the hammer arm 33 of the hammer member 11. It is provided in the attachment part 33c provided in the lower front end. The guide hole 29 has a relative operation locus (when the transmission member 10 rotates about the transmission holding shaft 21 and the hammer member 11 rotates about the hammer holding shaft 31). That is, it is a long hole formed long along the movement locus.

  That is, as shown in FIGS. 3, 8A and 9, the guide hole 29 is provided such that its longitudinal center line is inclined downward (lower left in FIG. 3). In addition, the guide hole 29 has a length (hole width) in a direction orthogonal to the longitudinal direction of the guide hole 29 that is substantially the same as the outer diameter of the interlocking protrusion 28, that is, the outer diameter of the buffer portion 28b. Is formed in a length of about 1.5 to 2 times the outer diameter of the interlocking protrusion 28.

  In this case, as shown in FIGS. 3, 8 (a), and 9, the guide hole 29 is formed on the inner peripheral surface of the guide hole 29 when moving with the interlocking protrusion 28 inserted therein. The buffer portion 28b of the interlocking protrusion 28 is elastically contacted and moved, and the sliding protrusion 29d of the buffer portion 28b is elastically contacted with the side edge of the guide hole 29, that is, the side surface of the mounting portion 33c of the hammer member 11. Thus, by sliding, the mounting portion 33 c of the hammer member 11 is configured not to directly contact the support portion 22 d of the transmission member 10.

  As a result, as shown in FIGS. 3 and 9, the interlock control unit 27 causes the transmission member 10 corresponding to the key 2 that has been depressed to rotate, and the hammer member 11 accompanies the rotation of the transmission member 10. When the rotating operation is performed in conjunction with each other, the rotating operation of the hammer member 11 is controlled by the relative operation of the interlocking protrusion 28 with respect to the guide hole 29.

  That is, as shown in FIG. 3, the interlock control unit 27 rotates the transmission member 10 when the key 2 is pressed and the transmission member 10 rotates counterclockwise around the transmission holding shaft 21. Along with this, the interlocking protrusion 28 abuts on the front end upper part of the guide hole 29 and pushes up the front end upper part of the guide hole 29 so that the hammer member 11 is rotated clockwise around the hammer holding shaft 31. .

  Further, as shown in FIG. 9, the interlock control unit 27 rotates the transmission member 10 when the interlocking protrusion 28 is movable along the guide hole 29 when the hammer member 11 is pushed up. Even if the speed and the rotational speed of the hammer member 11 are the same or different, the transmission member 10 and the hammer member 11 are configured to rotate in conjunction with each other.

  Further, as shown in FIG. 9, the interlock control unit 27 is in a state in which the interlocking protrusion 28 is movable relative to the guide hole 29 when the key 2 that has been pressed is returned to the initial position. As a result, the transmission member 10 is configured to rotate clockwise about the transmission holding shaft 21 by its own weight, and the hammer member 11 is rotated counterclockwise about the hammer holding shaft 31 by its own weight. Yes.

  Further, as shown in FIG. 3, the interlocking control unit 27 is configured such that when the transmission member 10 and the hammer member 11 return to the initial positions, the interlocking protrusion 28 moves toward the upper front end of the guide hole 29. The interlocking projection 28 is configured to abut or approach the upper front end of the guide hole 29.

Next, the operation of the keyboard device 1 of such an electronic keyboard instrument will be described.
In this keyboard device 1, when the key 2 is in an initial state where no key pressing operation is performed, the transmission member 10 rotates clockwise around the transmission holding shaft 21 of the transmission holding portion 12 by its own weight, and the transmission main body portion A transmission felt 25 provided on the lower surface of 22 abuts against the capstan 26 of the key 2 from above.

  At this time, the weight set by the weight of the transmission member 10, that is, the shape and thickness of the vertical plate portion 22a of the transmission main body portion 22 and the formation density of the plurality of rib portions 22b and 22c is applied to the capstan 26 of the key 2 from above. Join. As a result, the key 2 is pushed by the transmission member 10 and rotates counterclockwise about the balance pins 4a and 4b, the rear end of the key 2 comes into contact with the cushion members 6a and 6b, and the key 2 is in the initial position. The transmission member 10 is also restricted to the initial position.

  Further, at this time, the hammer member 11 rotates counterclockwise around the hammer holding shaft 31 of the hammer holding portion 13 by its own weight, and the hammer arm 33 abuts on the lower limit stopper 36 and is positioned at the lower limit position. Yes. In this state, the switch pressing portion 39 of the hammer member 11 is disposed at a position away from the rubber switch 42 of the switch board 40. For this reason, the rubber switch 42 is in a free state in which the bulging portion 42a is expanded, and is turned off when the plurality of movable contacts 42b are separated from the fixed contacts (not shown).

Next, a case where the key 2 in such a state is depressed and played is described.
In this case, when the key 2 is depressed, the key 2 rotates clockwise in FIG. 3 around the balance pins 4a and 4b, and the capstan 26 of the key 2 pushes up the transmission member 10. At this time, the weight set by the shape and thickness of the vertical plate portion 22a of the transmission main body portion 22 and the formation density of the plurality of rib portions 22b and 22c, which is the weight of the transmission member 10, is applied to the key 2 as an initial load. The

  Thus, the transmission member 10 rotates counterclockwise in FIG. 3 around the transmission holding shaft 21 of the transmission holding member 12 against its own weight. Then, the rotation operation of the transmission member 10 is transmitted to the hammer member 11 by the interlock control unit 27, and the hammer member 11 is pushed up against its own weight. That is, when the transmission member 10 rotates counterclockwise in FIG. 3, the interlocking protrusion 28 abuts on the upper front end of the guide hole 29 and pushes up the upper front end of the guide hole 29 as the transmission member 10 rotates.

  As a result, the hammer member 11 rotates clockwise in FIG. 3 around the hammer holding shaft 31 of the hammer holding member 13 to apply an action load to the key 2. That is, when the hammer member 11 rotates clockwise in FIG. 3 about the hammer holding shaft 31, an action load is applied to the key 2 by the moment of inertia of the hammer member 11. In this case, as shown in FIGS. 3 and 9, the hammer arm 33 is formed such that the length of the key 2 in the front-rear direction is substantially the same as that of the transmission member 10. 32 is formed.

  In this state, the hammer fitting portion 34 of the hammer arm 33 is rotatably attached to the hammer holding shaft 31, so that when the hammer member 11 rotates clockwise about the hammer holding shaft 31, the hammer member 11 generates a moment of inertia. A load due to this moment of inertia is applied as an action load to the key 2 via the interlock control unit 27 and the transmission member 10. As a result, a key touch feeling similar to that of an acoustic piano can be obtained.

  When the hammer member 11 rotates clockwise about the hammer holding shaft 31 as described above, the switch pressing portion 39 of the hammer arm 33 is formed in the reverse dome shape of the rubber switch 42 provided on the switch board 40 as shown in FIG. The bulging part 42a is pressed from below. As a result, the inverted dome-shaped bulging portion 42a is elastically deformed, and the plurality of movable contacts 42b in the bulging portion 42a sequentially contact the plurality of fixed contacts with a time interval.

  At this time, a switch signal corresponding to the depressed key 2 is supplied to the sound source unit 40a, musical tone data is generated by the sound source unit 40a, and a speaker (not shown) as a sound generation unit based on the generated musical tone data. Sound). When the hammer member 11 further rotates clockwise about the hammer holding shaft 31, the hammer arm 33 comes into contact with the upper limit stopper 37 from below, and the rotation of the hammer member 11 is restricted and stopped.

  That is, the key stroke setting portion 43 provided on the hammer arm 33 abuts against the upper limit stopper 37 from the lower side, whereby the rotation amount of the hammer arm 33 is regulated. For example, when the hammer member 11 corresponding to the white key 2 a rotates, the white key stopper contact portion 43 a of the hammer arm 33 contacts the upper limit stopper 37 from below. When the hammer member 11 corresponding to the black key 2b rotates, the black key stopper contact portion 43b of the hammer arm 33 contacts the upper limit stopper 37 from below.

  In this case, the stopper contact portion 43a for the white key is formed at substantially the same height as the upper surface of the hammer arm 33, and the stopper contact portion 43b for the black key is a height protruding from the upper surface of the hammer arm 33. Is formed. For this reason, the white key 2a and the black key 2b have different lengths in the front-rear direction, and the length of the white key 2a is longer than the length of the black key 2b. Even if the key strokes of the black key 2b are different from each other, the key stroke of each key 2 is set to the same length by the white key stopper contact portion 43a and the black key stopper contact portion 43b. .

  That is, the stopper contact portion 43a for the white key is formed at substantially the same height as the upper surface of the hammer arm 33, so that the space between the hammer arm 33 and the upper limit stopper 37 according to the key stroke of the white key 2a. The distance is set. The black key stopper abutting portion 43b is formed at a height protruding from the upper surface of the hammer arm 33, so that the black key 2b is positioned between the hammer arm 33 and the upper limit stopper 37 according to the key stroke of the black key 2b. The distance is set.

  Thereby, when the hammer member 11 corresponding to the pressed white key 2a rotates, the amount of rotation of the hammer member 11 (that is, the same rotation angle) and the hammer member 11 corresponding to the black key 2b pressed. The rotation amount (that is, the same rotation angle) of the hammer member 11 at the time of rotation of the hammer member 11 becomes the same, and the hammer member 11 corresponding to the white key 2a and the hammer member 11 corresponding to the black key 2b have the same rotation amount (that is, It contacts the upper limit stopper 37 at the same rotation angle). For this reason, the white key 2a and the black key 2b have the same key stroke.

  Thereafter, when the key release operation (return operation) in which the key 2 returns to the initial position is started, the transmission member 10 has its own weight while the interlocking projection 28 is movable relative to the guide hole 29. The hammer member 11 rotates counterclockwise by its own weight and returns to the initial position. As a result, the key 2 returns to the initial position, and the interlocking projection 28 of the interlocking control unit 27 comes into contact with or approaches the upper front end of the guide hole 29.

  By the way, in such a keyboard device 1, when the key 2 is pressed with a light force (weak force), the key 2 slowly rotates clockwise around the balance pins 4 a and 4 b, The stun 26 slowly pushes up the transmission member 10. At this time, the weight set by the shape and thickness of the vertical plate portion 22a of the transmission main body portion 22 and the formation density of the plurality of rib portions 22b and 22c, which is the weight of the transmission member 10, is applied to the key 2 as a static load. Is done.

  As a result, the transmission member 10 rotates slowly counterclockwise around the transmission holding shaft 21 of the transmission holding member 12 against its own weight, and the interlocking projection 28 of the interlocking control unit 27 moves over the upper front end of the guide hole 29. Push it up slowly. Along with this, the hammer member 11 slowly rotates clockwise around the hammer holding shaft 31 of the hammer holding member 13 to apply an action load to the key 2.

  Then, the switch pressing portion 39 of the hammer member 11 presses the rubber switch 42 provided on the switch substrate 40 to perform the switching operation, and the rear end upper portion of the hammer member 11 comes into contact with the upper limit stopper 37 from the lower side. 11 is stopped.

  At this time, the interlocking protrusion 28 of the interlocking control unit 27 is kept in contact with the upper front end of the guide hole 29. In this state, when the key release operation (return operation) in which the key 2 returns to the initial position is started, the transmission member 10 is in a state where the interlocking protrusion 28 of the interlocking control unit 27 is in contact with or close to the upper front end of the guide hole 29. The hammer member 11 rotates counterclockwise with its own weight and returns to the initial position, and returns the key 2 to the initial position.

  On the other hand, in such a keyboard apparatus 1, when the key 2 is pressed with a strong force, the key 2 rotates at a high speed clockwise around the balance pins 4a and 4b, and the capstan 26 of the key 2 Pushes up the transmission member 10 at a high speed. At this time, acceleration occurs in the transmission main body 22 of the transmission member 10.

  Therefore, the weight set by the shape and thickness of the vertical plate portion 22a of the transmission main body portion 22 and the formation density of the plurality of rib portions 22b and 22c, and the shape and thickness of the vertical plate portion 22a and the plurality of rib portions 22b, A dynamic load is generated according to the center-of-gravity position G set by the formation position of 22c, and this dynamic load is applied to the key 2 and also to the hammer member 11.

  As a result, the transmission member 10 rotates at a high speed counterclockwise around the transmission holding shaft 21 of the transmission holding member 12. At this time, the interlocking protrusion 28 of the interlocking controller 27 pushes up the upper part of the front end of the guide hole 29 rapidly at a high speed. For this reason, the hammer member 11 suddenly rotates at a high speed clockwise around the hammer holding shaft 31 of the hammer holding member 13, and applies an action load to the key 2. At this time, if the rotation speed of the hammer member 11 is higher than the rotation speed of the transmission member 10, the upper front end of the guide hole 29 of the interlock control unit 27 is separated from the interlock protrusion 28, and the interlock protrusion 28 is in the guide hole 29. The inside moves relatively toward the lower end of the rear end.

  Then, the switch pressing portion 39 of the hammer member 11 suddenly presses the rubber switch 42 provided on the switch substrate 40 to perform the switch operation, and the upper end of the hammer member 11, that is, the white key stopper contact portion 43a or The black key stopper abutting portion 43b abuts against the upper limit stopper 37 suddenly from below. For this reason, the hammer member 11 is repelled by the upper limit stopper 37.

  At this time, as shown in FIG. 9, since the interlocking protrusion 28 of the interlocking control unit 27 is relatively distant from the upper part of the front end of the guide hole 29, the hammer member 11 rotates counterclockwise around the hammer holding shaft 31. The front upper end of the guide hole 29 of the interlock control unit 27 abuts or approaches the interlocking protrusion 28. For this reason, the hammer member 11 stops at a position away from the upper limit stopper 37 or slightly rotates the transmission member 10 in the clockwise direction. Thereby, the rebound of the hammer member 11 is suppressed.

  When the key release operation (return operation) for returning the key 2 to the initial position is started, the interlocking projection 28 of the interlocking control unit 27 comes into contact with the upper front end of the guide hole 29 while being movable along the guide hole 29. In this state, the transmission member 10 rotates clockwise with its own weight to return to the initial position, and the hammer member 11 rotates counterclockwise with its own weight to return to the initial position, thereby returning the key 2 to the initial position.

  By the way, when the key 2 is pressed with a strong force as described above and the rear end upper portion of the hammer member 11 suddenly comes into contact with the upper limit stopper 37 from below, The upper limit stopper rail 38 receives an impact. At this time, since the vibration preventing member 52 is mounted on the upper limit stopper rail mounting portion 16e of the support member 16 and presses the rail body 45 of the upper limit stopper rail 38 from above, the upper limit stopper rail 38 vibrates. There is no.

  That is, the vibration preventing member 52 has its vibration preventing mounting portion 52b attached to the upper limit stopper rail mounting portion 16e together with the upper limit stopper rail 38, and the vibration preventing presser portion 52a is located above the rail body 45 of the upper limit stopper rail 38. Since the upper limit stopper rail 38 does not vibrate due to the impact even if the upper limit stopper rail 38 receives an impact from the hammer member 11, the generation of noise due to the vibration of the upper limit stopper rail 38 is prevented. be able to.

  In this case, since the first vibration absorbing member 53 is provided between the vibration preventing presser 52 a of the vibration preventing member 52 and the rail main body 45 of the upper limit stopper rail 38, the upper limit stopper rail 38 is moved by the hammer member 11. When receiving an impact, the impact can be absorbed by the first vibration absorbing member 53. Also by this, vibration of the upper limit stopper rail 38 due to impact can be prevented, and generation of abnormal noise can be reliably prevented.

  Further, since the second vibration absorbing member 54 is provided between the vibration preventing mounting portion 52 b of the vibration preventing member 52 and the rail main body mounting portion 46 of the upper limit stopper rail 38, the upper limit stopper rail 38 is moved by the hammer member 11. Even if an impact is received and the impact is transmitted to the vibration preventing member 52, the vibration of the vibration preventing member 52 due to the impact can be absorbed by the second vibration absorbing member 54. Also by this, vibration of the upper limit stopper rail 38 due to impact can be prevented, and generation of abnormal noise can be reliably prevented.

  When the key 2 is pressed with a strong force and the upper rear end of the hammer member 11 abruptly comes into contact with the upper limit stopper 37 from below, the rail body mounting portion 46 of the upper limit stopper rail 38 is moved to the upper limit. Since the strength reinforcing portion 47 is attached to the stopper rail attaching portion 16e, the rail body attaching portion 46 of the upper limit stopper rail 38 is not turned up from the vertical portion 44b of the upper limit stopper rail attaching portion 16e.

  That is, the strength reinforcing portion 47 is engaged with an engaging protrusion 47a provided on the vertical portion 44b of the upper limit stopper rail attaching portion 16e inserted into an engaging hole 47b provided on the rail body attaching portion 46. As a result, when the hammer arm 33 strongly comes into contact with the upper limit stopper 37 of the upper limit stopper rail 38 from below, the rail body mounting portion 46 is prevented from turning up, and the impact by the hammer arm 33 is reliably received. be able to.

  For example, when the key 2 is hit or hit, the impact load applied to the upper limit stopper rail 38 by one hammer member 11 is 200 g or more, and about ten hammer members 11 are simultaneously applied to the upper limit stopper rail 38. The impact load is 2 kg or more. Even if such a large impact load is applied, the impact can be reliably received by the strength reinforcing portion 47.

  When the hammer arm 33 strongly contacts the upper limit stopper 37 of the upper limit stopper rail 38 from below, the vibration of the upper limit stopper rail 38 by the hammer arm 33 is absorbed by the buffer member 49, and the upper limit stopper rail mounting portion It is possible to prevent the vibration due to the impact from being transmitted to 16e, and to suppress the generation of abnormal noise due to the impact.

  In this case, the inclined portion 44a of the upper limit stopper rail mounting portion 16e and the rear end of the bridge portion 16b of the support member 16 are formed in a curved portion 50 that is gently curved, so that the hammer arm 33 is moved to the upper limit stopper rail 38. When strongly contacting the upper limit stopper 37 from below, the stress due to the impact can be dispersed by the bending portion 50, whereby the stress is concentrated on a part of the bending portion 50 and the bending portion 50 is damaged. There is nothing to do.

  Further, since the plurality of reinforcing ribs 51 are provided radially along the curved portion 50 on both surfaces of the bridge portion 16b of the support member 16 where the curved portion 50 is formed, the curved portion is formed by the plurality of reinforcing ribs 51. 50 can be reinforced. For this reason, the strength of the bending portion 50 can be secured, and when the hammer arm 33 strongly comes into contact with the upper limit stopper 37 of the upper limit stopper rail 38 from the lower side, the bending portion 50 is damaged by the impact. Can be prevented.

  When the keyboard device 1 performs a so-called continuous hitting operation in which one key 2 is continuously pressed, the key 2 is pressed once, the hammer member 11 is pushed up to reach the upper limit position, and the hammer While the member 11, the transmission member 10, and the key 2 return to the initial positions, the same key 2 is pressed again.

  At this time, the interlocking projection 28 of the interlocking control unit 27 can move along the guide hole 29. For this reason, even if the rotational speed of the hammer member 11 in the return direction and the rotational speed of the transmission member 10 in the return direction are the same speed or different speeds, the hammer member 11 and the transmission member 10 Are each returned to the initial position due to their own weight, and accordingly, the key 2 is also returned to the initial position. When the key 2 is pressed again during the returning operation of the key 2, the transmission member 10 in the middle of returning to the initial position is pushed up again by the capstan 26 of the key 2.

  Then, the transmission member 10 in the middle of returning rotates again counterclockwise around the transmission holding shaft 12. At this time, the interlocking protrusion 28 of the interlocking controller 27 moves along the guide hole 29 to push up the upper front end of the guide hole 29. Thereby, the hammer member 11 in the middle of returning to the initial position rotates again clockwise around the hammer holding shaft 31, applies an action load to the key 2, and presses the rubber switch 42 to perform a switch operation.

  For this reason, when one key 2 is operated repeatedly, the return operation of the hammer member 11 and the return operation of the transmission member 10 are controlled by the relative movement of the interlocking protrusion 28 with respect to the guide hole 29 of the interlocking controller 27. . As a result, a continuous hitting operation in which one key 2 is continuously pressed can be improved, and the continuous hitting performance can be improved.

  As described above, according to the keyboard device 1 of the electronic keyboard instrument, the plurality of keys 2, the action mechanisms 3 provided corresponding to the plurality of keys 2, and the plurality of supports that support the action mechanism 3. A hammer member 11 that applies an action load to the key 2 that is being pressed, by the action mechanism 3 operating in response to a key pressing operation of the key 2, and a support member 16. Is provided with an upper limit stopper rail 38 having an upper limit stopper 37 for restricting the upper limit position of the operation range of the hammer member 11, and a vibration preventing member 52 for preventing the vibration of the upper limit stopper rail 38. The vibration of the upper limit stopper rail 38 can be prevented, and the generation of noise due to the vibration can be prevented.

  That is, in the keyboard device 1 of this electronic keyboard instrument, when the hammer member 11 comes into contact with the upper limit stopper 37 from below and the upper limit stopper rail 38 receives an impact, the upper limit stopper rail 38 vibrates due to the impact. Can be prevented by the vibration preventing member 52, so that the generation of noise due to the vibration of the upper limit stopper rail 38 can be reliably and satisfactorily prevented.

  In this case, the support members 16 are located at a plurality of positions in the arrangement direction of the keys 2 and are arranged between the adjacent keys 2, and an upper limit stopper rail 38 is attached across the plurality of support members 16. The vibration preventing member 52 is attached to the plurality of support members 16 and pressed the upper limit stopper rail 38 from above with the hammer member 11 being arranged along the arrangement direction of the keys 2. Thus, even if the upper limit stopper 37 receives an impact from below, the vibration preventing member 52 can reliably and satisfactorily prevent the upper limit stopper rail 38 from vibrating.

  That is, when the upper limit stopper rail 38 is impacted by the contact of the hammer member 11 at a position located in the middle between the plurality of support members 16, the upper limit stopper rail 38 at the middle position between the support members 16 is bent. Although it is easy, since the upper limit stopper rail 38 located in the middle can be pressed by the vibration preventing member 52, the upper limit stopper rail 38 located in the middle can be reliably prevented from being bent, and the upper limit stopper rail 38 can be prevented. Can be satisfactorily prevented.

  In this case, the vibration preventing member 52 includes a vibration preventing pressing portion 52a that holds the upper surface of the upper limit stopper rail 38 corresponding to the upper limit stopper 37, a vibration preventing mounting portion 52b that is attached to the support member 16, a vibration preventing pressing portion 52a, and a vibration. By having the vibration preventing connecting portion 52c that connects the preventing mounting portion 52b, the upper limit stopper rail 38 can be reliably pressed from above by the vibration preventing pressing portion 52a.

  That is, when the vibration preventing attachment part 52b is attached to the support member 16 together with the upper limit stopper rail 38, the vibration preventing attachment part 52c causes the vibration preventing connection part 52c to change the vibration preventing presser part 52a to the upper limit stopper rail 38. Since pressing is performed from above, the upper limit stopper rail 38 can be reliably pressed from above by the vibration preventing pressing portion 52a, and thus vibration of the upper limit stopper rail 38 can be satisfactorily prevented.

  In the keyboard device 1, the first vibration absorbing member 53 is provided between the vibration preventing presser portion 52 a of the vibration preventing member 52 and the rail main body portion 45 of the upper limit stopper rail 38, so that the upper limit stopper rail 38. When the shock is received by the hammer member 11, the shock can be absorbed by the first vibration absorbing member 53. Also by this, vibration of the upper limit stopper rail 38 due to impact can be prevented, and generation of abnormal noise due to vibration of the upper limit stopper rail 38 can be reliably prevented.

  Further, in the keyboard device 1, the second vibration absorbing member 54 is provided between the vibration preventing mounting portion 52 b of the vibration preventing member 52 and the rail main body mounting portion 46 of the upper limit stopper rail 38, whereby the upper limit stopper rail is provided. Even if 38 receives an impact by the hammer member 11 and the impact is transmitted to the vibration preventing member 52, the vibration of the vibration preventing member 52 due to the impact can be absorbed by the second vibration absorbing member 54. Also by this, vibration of the upper limit stopper rail 38 due to impact can be prevented, and generation of abnormal noise due to vibration of the upper limit stopper rail 38 can be reliably prevented.

  In the above-described embodiment, the case where the interlocking protrusion 28 of the interlocking control unit 27 is provided in the transmission member 10 and the guide hole 29 is provided in the hammer member 11 is described. May be provided in the mounting portion 33 c of the hammer member 11, and the guide hole 29 may be provided in the support portion 22 d of the transmission member 10.

  In this case, when the key 2 is depressed with a weak force, the hammer member 11 is slowly pushed up with the interlocking protrusion 28 of the hammer member 11 in contact with the lower rear end of the guide hole 29 of the transmission member 10. When the key 2 returns to the initial position, the transmission member 10 and the hammer member 11 are returned to the initial position with the interlocking projection 28 in contact with the lower end of the guide hole 29. be able to.

  Further, when the key 2 is pressed with a strong force, the lower rear end portion of the guide hole 29 of the transmission member 10 abruptly contacts and pushes up the interlocking protrusion 28 of the hammer member 11, thereby urging the hammer member 11. Can rotate well. At this time, when the hammer member 11 comes into contact with the upper limit stopper 37 and is repelled, the interlocking protrusion 28 can be moved along the guide hole 29.

  For this reason, also in this interlocking control part 27, when the hammer member 11 rotates toward the initial position earlier than the transmission member 10, the interlocking protrusion 28 of the hammer member 11 is moved to the rear end of the guide hole 29 of the transmission member 10. Since it can be moved toward the lower part, the rotation operation of the hammer member 11 can be controlled by the relative operation of the interlocking protrusion 28 with respect to the guide hole 29. As a result, similar to the above-described embodiment, the unnatural and unnecessary movement of the hammer member 11 can be suppressed, so that a key touch feeling similar to the key touch feeling of an acoustic piano can be obtained.

  Further, even in the continuous hitting operation in which one key 2 is continuously pressed, the return operation of the hammer member 11 and the transmission member are performed by the relative operation of the interlocking protrusion 28 with respect to the guide hole 29 of the interlocking controller 27. 10 return operations can be controlled, and as a result, it is possible to reliably and satisfactorily perform a continuous hitting operation in which one key 2 is continuously pressed, so that the continuous hitting performance can be improved.

  In the above-described embodiment, the case where the guide portion that guides the interlocking protrusion 28 of the interlock control portion 27 is the guide hole 29 is described. However, the guide hole 29 does not necessarily have to be a guide wall. It may be a guide groove. Also in this case, the guide groove part should just be formed long along the relative motion locus | trajectory of the interlocking projection part 28. FIG.

  Further, in the above-described embodiment and its modifications, the case where the interlocking projection 28 of the interlocking control unit 27 is provided in a cantilever shape on the support portion 22d of the transmission member 10 or the attachment portion 33c of the hammer member 11 will be described. However, the present invention is not limited to this.

  Furthermore, in the above-described embodiment, the case where the transmission member is configured to rotate is described. However, the present invention is not limited to this. For example, the force of pressing the key by being displaced (moved) in the vertical direction with the key pressing. May be transmitted to the hammer member 11.

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)
The invention according to claim 1 includes a plurality of keys, an action mechanism provided corresponding to each of the plurality of keys, and a support member that supports the action mechanism, and the action mechanism includes the key. A hammer member that applies an action load to the key that is being pressed, and a support member that is attached to the key that is being pressed to regulate the upper limit position of the operating range of the hammer member. A keyboard device comprising: an upper limit stopper mounting member to which an upper limit stopper is mounted; and a vibration preventing member for preventing vibration of the upper limit stopper mounting member.

  According to a second aspect of the present invention, in the keyboard device according to the first aspect, the support member is disposed between adjacent keys located at a plurality of locations in the key arrangement direction, and the upper limit stopper is attached. The member has a rail shape, the upper limit stopper attaching member is attached across the plurality of support members, and the vibration preventing member is arranged along the arrangement direction of the keys. The keyboard device is attached to a support member and presses the upper limit stopper mounting member from above.

  According to a third aspect of the present invention, in the keyboard device according to the first or second aspect, the vibration preventing member includes a pressing portion that presses an upper surface of the upper limit stopper mounting member corresponding to the upper limit stopper, and the support. A keyboard device comprising: an attachment portion attached to a member; and a connecting portion connecting the presser portion and the attachment portion.

  According to a fourth aspect of the present invention, in the keyboard device according to any one of the first to third aspects, a first vibration absorbing member is provided between the vibration preventing member and the upper limit stopper mounting member. This is a keyboard device.

  According to a fifth aspect of the present invention, in the keyboard device according to any one of the first to fourth aspects, a second vibration absorbing member is provided between the vibration preventing member and the support member. It is the keyboard device characterized.

The invention according to claim 6 is the keyboard device according to any one of claims 1 to 5,
A sound generation unit that generates a musical sound in response to an operation of the key of the keyboard device;
A keyboard instrument characterized by comprising:

DESCRIPTION OF SYMBOLS 1 Keyboard apparatus 2 Key 3 Action mechanism 10 Transmission member 11 Hammer member 12 Transmission holding member 13 Hammer holding member 21 Transmission holding shaft 22, 45 Transmission main body part 22a 45a Vertical plate part 22b, 22c 45b, 45c Rib part 23 Transmission fitting part 27 Interlocking Control Unit 28 Interlocking Projection 28a Protrusion Main Body 28b Buffer 28c Hook 28d Sliding Protrusion 29 Guide Hole 31 Hammer Holding Shaft 32 Hammer 33 Hammer Arm 33c Mounting Portion 34 Hammer Fitting 52 52 Vibration Prevention Member 52a Vibration Prevention Presser Part 52b Vibration preventing attachment part 52c Vibration preventing connecting part 53 First vibration absorbing member 54 Second vibration absorbing member

Claims (7)

Multiple keys,
An action mechanism provided corresponding to each of the plurality of keys;
A support member for supporting the action mechanism;
The action mechanism comprises:
A hammer member that applies an action load to the key that is being pressed by operating according to the key pressing operation of the key;
An upper limit stopper mounting member attached to the support member, to which an upper limit stopper for regulating the upper limit position of the operation range of the hammer member is attached;
A vibration preventing member for preventing vibration of the upper limit stopper mounting member;
With
The support member has a first surface portion and a second surface portion different from the first surface portion, and the second surface portion protrudes in a direction different from a direction in which the hammer member abuts on the upper limit stopper. Engaging projections are provided,
The upper limit stopper mounting member has an engagement hole, is attached to the first surface portion of the support member with a screw, and the engagement hole engages with the engagement protrusion on the second surface. A keyboard device characterized by a bent shape. The keyboard apparatus according to claim 1, wherein the support member is disposed between adjacent keys located at a plurality of locations in the arrangement direction of the keys,
The upper limit stopper mounting member has a rail shape, and the upper limit stopper mounting member is mounted across a plurality of the support members,
The keyboard device, wherein the vibration preventing member is attached to the plurality of support members and presses the upper limit stopper attaching member from above while being arranged along the arrangement direction of the keys.   3. The keyboard device according to claim 1, wherein the vibration preventing member includes a pressing portion that presses an upper surface of the upper limit stopper mounting member corresponding to the upper limit stopper, a mounting portion that is attached to the support member, and A keyboard device comprising: a pressing portion and a connecting portion that connects the mounting portion.   4. The keyboard apparatus according to claim 1, wherein a first vibration absorbing member is provided between the vibration preventing member and the upper limit stopper mounting member.   5. The keyboard device according to claim 1, wherein a second vibration absorbing member is provided between the vibration preventing member and the support member. 6. 6. The keyboard device according to claim 1, wherein the engagement protrusion protrudes in a direction orthogonal to a contact direction of the hammer member with the upper limit stopper. Keyboard device. A keyboard device according to any one of claims 1 to 6;
A sound generation unit that generates a musical sound in response to an operation of the key of the keyboard device;
A keyboard instrument characterized by comprising

Images