JP6551864B2 - 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 Japanese Patent Application Laid-Open No. 2002-258835, a Wipen that is rotated by a key pressing operation, and a jack that is driven according to the rotating operation of the Wipen, It is known to have a hammer member driven by the jack to strike a string, which is provided corresponding to each of a plurality of keys.

JP 2002-258835 A

  In this type of keyboard device, when the key is depressed, the wipen rotates by the depressed key, and the jack mounted on the wipen is driven by the wipen to push up the hammer member. The hammer member is configured to rotate to strike the strings.

  However, in such a keyboard device, in order to mount the jack on the wiper, not only a repetition lever is required, but also a support for supporting the repetition lever on the wiper is required. In addition to the problem of being complicated, there is a problem that the structure becomes more complicated because it is necessary to adjust the weight of the hammer member in order to obtain an optimum key touch feeling.

Such key touch feeling is determined by the state of the reaction force applied to the key after key depression. FIG. 13 is a graph showing the state of the reaction force of a general acoustic piano. The horizontal axis represents the elapsed time after key pressing, and the vertical axis represents the magnitude of the reaction force.
In particular, the key touch feeling varies greatly depending on the timing of the reaction force peak after the key is pressed (time t = b in FIG. 13).
The timing of reaching the peak of the reaction force is determined by various factors such as the positional relationship between the wiper and the hammer member, the structure, the weight, the material, and the like, and thus it is difficult to easily adjust the timing.

  The problem to be solved by the present invention is to provide a keyboard device capable of obtaining a good key touch and a keyboard instrument including the keyboard device.

According to the present invention, a transmission member includes a plurality of keys and a plurality of lattice rib portions in which ribs are formed in a lattice shape, and is displaced in response to a key depression operation of the key, and the key whose key depression operation is performed. A hammer member that applies an action load to the key being pressed by displacing in a vertical direction according to the displacement of the corresponding transmission member, and the plurality of grid-like rib portions are A plurality of first ribs extending in a first direction inside the transmission member, and a plurality of first ribs extending in a second direction different from the first direction and intersecting the plurality of first ribs inside the transmission member A third rib different from any of the first rib and the second rib in a lattice of a part of the plurality of lattices formed of the two ribs and formed by the plurality of lattice rib portions, or Plates are formed that are heavier than those in other grids And that is a keyboard device.

Further, according to the present invention, there are provided a transmission member having a plurality of keys and a plurality of lattice rib portions in which ribs are formed in a lattice shape, and displaced according to a key depression operation of the key, and the key depressed And a hammer member for applying an action load to the key being keyed by displacing in the vertical direction according to the displacement of the transmission member corresponding to the transmission holding member for rotatably holding the transmission member A shaft, the transmission member having a transmission fitting portion formed at one end of the transmission member and rotatably mounted on the transmission holding shaft, and the plurality of grid-like rib portions have a grid shape A plurality of first grid-like rib portions having a plurality of ribs formed thereon, and a plurality of second grid-like portions having a plurality of ribs formed in a grid so that the grid becomes finer than the first grid-like rib portions and a lattice-shaped rib portion, said plurality of second grid-like rib Each has a lattice positioned below the center of the transmission member, the distance from the transmitting fitting portion Ru is formed into a lattice in the long position than the distance to the center portion of the transmission member, keyboard Device.

  According to the present invention, the weight of the transmission member can be set by making the weight of the formed rib different according to the position on the surface of the transmission main body, and thus the weight of the transmission member set Can be applied to the key as a static load. As a result, the initial load of the key can be optimized, and at the time of key depression, the key pressing force of the key can be favorably transmitted to the hammer member as a static load. Therefore, good key touch can be obtained with a simple structure.

  Furthermore, the position of the center of gravity of the transmission member can be set by varying the weight of the formed rib according to the position on the surface of the transmission main body. By this, when the transmission member is rotationally displaced by the key that has been key-operated, the dynamic load can be applied to the key by the set center of gravity position of the transmission member, and at the same time the key is depressed Can be well transmitted to the hammer member as a dynamic load.

  Further, according to the present invention, since the barycentric position of the transmission member can be set in accordance with the formation position of the plurality of ribs formed in the transmission main body, when the transmission member is displaced by the key pressed. According to the position of the center of gravity of the transmission member set according to the formation position of the plurality of ribs formed in the transmission main body, the dynamic load can be applied to the key, and the key depression force of the key 2 at the time of key depression Can be transmitted to the hammer member 11 as a dynamic load. Therefore, good key touch can be obtained with a simple structure.

It is the top view which showed the keyboard apparatus in one Embodiment which applied this invention to the electronic keyboard 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. FIG. 4A is an enlarged plan view of the transmission member and the transmission holding member shown in FIG. 3, and FIG. is there. The transmission member shown in FIG. 3 is shown, FIG. 5A is an enlarged side view thereof, and FIG. 5B is an enlarged sectional view taken along the line CC of FIG. FIG. 6A is an enlarged plan view of the hammer member and the hammer holding member shown in FIG. 3, and FIG. 6B is an enlarged cross-sectional view of the main part in the direction of arrow DD. is there. FIG. 7 (a) is an enlarged side view of the hammer member for a white key, FIG. 7 (b) is an enlarged plan view thereof, and FIG. 7 (c) is a hammer member for a black key. FIG. 7D is an enlarged plan view thereof. Fig. 8 (a) is an enlarged sectional view taken along the line E-E in Fig. 3; Fig. 8 (b) is an enlarged side view showing the interlocking projection; ) Is an enlarged side view showing the interlocking projection part in an exploded manner. 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 the expansion side view which showed the modification of the transmission member in the keyboard apparatus to which this invention is applied. FIG. 11A is an enlarged side view of FIG. 11A and FIG. 11B is an enlarged cross-sectional view taken along the line CC of FIG. FIG. 12A is an enlarged side view, and FIG. 12B is an enlarged cross-sectional view taken along the line CC of FIG. 12A, showing still another modification of the transmission member in the keyboard device to which the present invention is applied. It is a graph which shows the state of the reaction force of a general acoustic piano. Fig. 14 (a) shows the characteristics of the transmission member and the reaction force, and Fig. 14 (a) shows the transmission member without the fine rib portion of the grid, and Fig. 14 (b) shows the key depression using the transmission member. It is a figure showing the characteristic of the reaction force added to a key when it is made. FIG. 15 (a) is a view showing characteristics of another transmission member and a reaction force, and FIG. 15 (a) is a transmission fitting portion in two grids located on the lower side of a rib like the transmission member shown in FIG. The case where the distance from the center is provided in the grid at a position longer than the distance to the center of the transmission member, and FIG. 15 (b) shows the case where the key is pressed using this transmission member. It is a figure showing the characteristic of the reaction force added to a key. FIG. 16 (a) is a diagram showing the characteristics of another transmission member and a reaction force, and FIG. 16 (a) shows that the rib portion is formed in a large grid shape on the lower side of the transmission member 10 and the number of ribs formed on the upper side. Is formed in a lattice shape smaller in mesh than the lower rib portion, and FIG. 16 (b) is a graph showing the state of the reaction force of a general acoustic piano.

Hereinafter, an embodiment in which the present invention is applied to an electronic keyboard instrument will be described with reference to FIGS.
This electronic keyboard instrument is provided with a keyboard device 1 as shown in FIG. 1 and FIG. 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 for applying an action load to each of the keys 2 in accordance with a key depression 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 substantially middle portions of the plurality of keys 2 in the front and rear direction (the left and right direction in FIG. 2) are rotatably supported in the vertical direction by the balance pins 4a and 4b respectively, and arranged in parallel on the base plate 5 in this state. ing. That is, the lengths of the white key 2a and the black key 2b are different 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 members 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 contact and releasably Are provided along the arrangement direction of the keys 2. Further, on the base plate 5, cushioning materials 7 are provided along the arrangement direction of the keys 2 with which the lower surfaces of the rear end portions (left end portions in FIG. 2) of the plurality of keys 2 contact each other. It has been.

  Thereby, as shown in FIG. 2, each key stroke of the plurality of keys 2 is set by the front side cushions 6 a and 6 b and the rear side cushion 7. Further, on the base plate 5, guide pins 8a and 8b are provided uprightly for preventing the plurality of keys 2 from swinging in the direction of arrangement.

  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 rotate counterclockwise around the balance pins 4a and 4b by the respective weights of the plurality of transmission members 10, and push up the respective keys 2 to the initial position. The load is configured to be applied.

  Further, as shown in FIGS. 2 and 3, the action mechanism 3 rotatably holds the plurality of transmission holding members 12 rotatably holding the plurality of transmission members 10 and the plurality of hammer members 11 respectively. And 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 mounted on the 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 of being respectively positioned at a plurality of predetermined points in the entire length of the arrangement direction of the keys 2. . In this case, for example, 88 keys 2 are arranged in total. Corresponding to this, the plurality of support members 16 are disposed at both ends in the arrangement direction of the plurality of keys 2 and between each of the three keys 2 located for each of, for example, twenty 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 supporting member 16 is made of a hard synthetic resin such as ABS resin, and as shown in FIGS. 2 and 3, an attaching portion 16a attached to the base plate 5 and an integrally formed on the attaching portion 16a. And a bridge portion 16b. Thus, 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 16 b protrudes above the key 2 by the attachment portion 16 a being mounted on the base plate 5. Has been.

  In this case, as shown in FIGS. 2 and 3, a rear rail support for supporting the transmission support rail 14 at the rear end lower portion of the bridge portion 16b, that is, the rear upper portion (left upper portion in FIG. 2) of the mounting portion 16a. The part 16c is provided. In addition, a front rail support portion 16d for supporting the hammer support rail 15 is provided on the front upper portion (upper right portion in FIG. 2) of the bridge portion 16b. Furthermore, a stopper rail supporting portion 16e is provided on the rear upper portion (upper left side in FIG. 2) of the bridge portion 16b, and a substrate rail supporting 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 band plate are bent downward along the longitudinal direction, and the entire length in the arrangement direction of the plurality of keys 2 is formed. It is formed in the length which extends. The transmission support rail 14 is configured such that a predetermined place in the arrangement direction of the keys 2 is mounted 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 attached to five positions on the transmission support rail 14 corresponding to the plurality of support members 16 so as to protrude 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, and as shown in FIGS. 4A and 4B, a plurality of shaft support portions 18 are, for example, about 10 on the main body plate 12a. The respective keys 2 are integrally formed along the arrangement direction of the keys 2. The shaft support 18 is configured such that the transmission member 10 is rotatably mounted to prevent lateral contact of the transmission member 10.

  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.

  The pair of guide walls 20, as shown in FIG. 4A, the transmission fitting portion 23 of the transmission member 10 in a state in which the transmission fitting portion 23 described later of the transmission member 10 is slidably sandwiched from both sides. The guide unit rotatably guides the guide. As shown in FIG. 4B, the transmission holding shaft 21 has a substantially round bar-like shape, and both sides of the outer peripheral surface thereof are cut away to form a non-circular cross-sectional shape.

  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. The restricting portion 19 rotatably guides the transfer member 10 while sandwiching the lower rear portion of the transfer member 10, and is configured to restrict lateral deflection of the transfer member 10 during packing and transportation.

  The transmission member 10 is made of hard synthetic resin such as ABS resin, and is rotated in the vertical direction according to the key depression operation of the key 2 to rotate the hammer member 11 in the vertical direction as shown in FIGS. A transmission main body portion 22 and a transmission fitting portion 23 integrally formed with the transmission main body portion 22 and rotatably mounted on the transmission holding shaft 21 of the transmission holding member 12 are provided.

  In the present embodiment, the transmission main body 22 is formed substantially in a waffle shape as shown in FIGS. 2, 3 and 5. That is, as shown in FIG. 5, the transmission main body portion 22 includes a thin plate member 22a and a plurality of first grid-like rib portions formed substantially in a grid shape integrally with the plate member 22a. 22b and an outer peripheral rib portion 22e formed on the outer peripheral portion of the plurality of first lattice rib portions 22b, which are formed in a waffle shape. In this case, the transmission main body 22 is configured such that the weight and the position of the center of gravity of the transmission member 10 are adjusted by the shape and thickness of the plate member 22a and the formation density of the plurality of first grid ribs 22b. .

  For example, as shown in FIGS. 5 (a) and 5 (b), the plurality of first grid rib portions 22b are provided substantially in a grid on both side surfaces of the plate member 22a, and these grid grids 22b are formed. Among the grids, a plurality of second grid-like rib portions 22c having finer grids as the center-of-gravity position setting member of the present invention are provided in some grids, and the number of ribs formed in the grids The configuration has been increased. That is, the plurality of second grid-like rib portions 22c with fine grids have a distance from the transmission fitting portion 23 in the two grids located below the central portion of the plate member 22a. It is provided in the grid at a position longer than the distance to the center.

  Thereby, as shown in FIG. 5A, the transmission member 10 has the shape and thickness of the plate member 22a of the transmission main body 22 and the formation density of the plurality of first and second grid-like rib portions 22b and 22c. The weight is set by. Further, the transmission member 10 is in a state where the plurality of first and second grid-like rib portions 22b and 22c are formed, that is, a plurality of fine grids provided in a part of the plurality of first grid-like rib portions 22b. The center-of-gravity position G of the transmission member 10 is set to a position shifted from the center of the transmission main body 22 depending on the formation position of the second grid-like rib portion 22c.

The distance between the gravity center position G and the center position of the transmission fitting portion 23 has a relationship with the reaction force characteristic shown by the graph of FIG.
14 to 16 are diagrams showing the relationship between the position of the center of gravity of the transmission member 10 and the reaction force characteristic. FIG. 14A shows the case where the second grid-like rib portion 22c in the form of a finer grid is not provided as compared with the transfer member 10 shown in FIG. The distance from the center position of the joint 23 is L1. The reaction force characteristic is as shown in FIG. 14 (b), and the timing at which the reaction force reaches its peak is after a time has elapsed from the key depression.

  On the other hand, in FIG. 15 (a), as in the transmission member 10 shown in FIG. 5, the second grid rib portion 22c is located in the two grids located below the central portion of the transmission member 10; This is a case where the distance from the transmission fitting portion 23 is provided in the mesh at a position longer than the distance to the center portion. The barycentric position B in this case is changed, and the distance between the barycentric position A and the center position of the transmission fitting portion 23 becomes L2, which is longer than L1.

  As a result, when the transmission member 10 is rotated by the key depression, the distance from the center position of the center of gravity of the transmission fitting portion 23 which is the fulcrum of the center of gravity position B is longer than in FIG. The timing (time b) at which the moment increases and the reaction force peaks can be delayed as compared with the case of FIG. 14 (b> a). In this embodiment, by setting the time b to be the same as the characteristics of the acoustic piano in FIG. 13 and FIG. 16B, it is possible to obtain the same key touch feeling as the acoustic piano.

  FIG. 16 (a) shows a structure in which the rib portions are formed in the form of a large grid in the lower part of the transmission member 10, and the number of ribs formed in the upper side is increased to form the smaller grid. is there. In this case, the distance between the center of gravity position C and the center position of the transmission fitting portion 23 is L3 longer than L1 and L2. As a result, when the transmission member 10 is rotated by the key depression, the moment of inertia is larger than in the cases of FIGS. 14 and 15, and the timing at which the reaction force peaks is as shown in FIGS. It can be further delayed compared.

  As described above, in the present embodiment, the position of the center of gravity of the transmission member 10 can be changed according to the number of ribs formed on the transmission member 10 and the position to be formed. Can change the reaction force characteristic applied to to obtain a more optimal key touch feeling.

  Further, even if the thickness of the plate member 22a of the transmission main body portion 22 of the transmission member 10 is thin, the strength is secured by the plurality of first and second grid rib portions 22b and 22c. When molding with synthetic resin, the plurality of first and second lattice-like rib portions 22b and 22c are configured to prevent the plate member 22a from sinking.

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

  Further, as shown in FIG. 5A, the transmission fitting portion 23 is formed at its central portion with a fitting hole 23a in which the transmission holding shaft 21 of the transmission holding member 12 is fitted, and the fitting hole 23a is formed. An insertion port 23b into which the transmission holding shaft 21 is insertably inserted and removed is formed at a part of the periphery of the housing, that is, the rear part around the fitting hole 23a, and the transmission holding shaft 21 passes through the insertion hole 23a through the insertion port 23b. It is configured to be rotatably attached to the transmission holding shaft 21 by being inserted.

  In this case, as shown in FIG. 5A, when the transmission holding shaft 21 is inserted into the fitting hole 23a through the insertion opening 23b, the transmission fitting portion 23 is located above the transmission holding shaft 21. The insertion opening 23b corresponds to a portion where both sides of the transmission holding shaft 21 are notched, and when the insertion opening 23b is pressed into the transmission holding shaft 21 in this state, the insertion opening 23b is a transmission holding shaft 21. The transmission holding shaft 21 is configured to be inserted into and fitted to the fitting hole 23 a by being slightly spread.

  By the way, on the lower rear side of the transmission main body 22 of the transmission member 10, as shown in FIGS. 2 to 5, a thin engaging portion 24 regulated by the regulation portion 19 of the transmission holding member 12 is provided. ing. As shown in FIG. 4 and FIG. 5, the engaging portion 24 is notched on both sides of the rear lower portion of the transmission main body portion 22.

  For this reason, as shown in FIGS. 4 and 5, the engaging portion 24 is formed so that its thickness is substantially the same as the length between the pair of restricting walls of the restricting portion 19. Thus, the engaging portion 24 rotatably guides the transmission member 10 by being inserted between the pair of restriction walls of the restriction portion 19 and also restricts lateral deflection of the transmission member 10 during packing and 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 transfer felt 25 is configured such that a capstan 26 provided on the upper rear side of the key 2 abuts from the lower side.

  Thereby, as shown in FIG. 2 and FIG. 3, when the key 2 is depressed, the transmission member 10 is pushed up by the capstan 26 of the key 2 which contacts the transmission felt 25 from the lower side, and transmission is maintained. It is configured to rotate counterclockwise around the axis 21. Further, the upper end of the transmission body portion 22 of the transmission member 10 is formed to be higher in height than the upper end of the rear end, whereby the upper side portion is formed to be inclined downward to the rear (down to the 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 22 d is configured to move up and down along the side surface of the hammer member 11 without contacting 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 into a shape in which both side portions of the band plate are bent downward along the longitudinal direction, as in the transmission support rail 14. It is formed in the length over the full length of the arrangement direction of the key 2. The hammer support rail 15 is configured such that a predetermined location in the arrangement direction of the keys 2 is mounted on the front rail support portions 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 hard synthetic resin such as ABS resin, and 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 FIG. 2, FIG. 3, FIG. 6, and FIG. 7, the shaft support portion 13b includes a pair of guide walls 30 and a hammer holding shaft 31 formed between the pair of guide walls 30. have. The pair of guide walls 30 is formed at the rear end (the left end in FIG. 6B) of the main body plate 13a in correspondence with each of the plurality of hammer members 11.

  As shown in FIGS. 6 (a) and 6 (b), the pair of guide walls 30 sandwich the hammer fitting portion 34, which will be described later, of the hammer member 11 in a slidable manner from both sides. The guide part which rotatably guides the hammer fitting part 34 of this is comprised. As shown in FIG. 6 (b), the hammer holding shaft 31 has a substantially round rod shape, and both sides of the outer peripheral surface thereof are notched in the same manner as the transmission holding shaft 21, 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 as shown in FIGS. 6 and 7, has a hammer portion 32 and a hammer arm 33, which are integrally formed. . In this case, as shown in FIGS. 7A to 7D, the hammer 11 is a part of the configuration of the white key 2a and the black key 2b of the key 2, that is, the upper limit stopper 37 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 plate member 32a of a ladder shape, and a plurality of rib portions 32b 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 plate member 32a having a ladder shape 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 whose length in the front-rear direction 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. The configuration is A hammer fitting portion 34 rotatably attached to the hammer holding member 13 is formed at the front end (right end 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, similarly to the transmission fitting portion 23, and is formed to project 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 such that the thickness in the arrangement direction of the keys 2 is substantially the same as the length between the pair of guide walls 30. Is configured to be slidably inserted into the

  Further, as shown in FIG. 7, this hammer fitting portion 34 is formed at its center with a fitting hole 34a in which the hammer holding shaft 31 of the hammer holding member 13 is fitted. An insertion opening 34b is formed in the front part around the fitting hole 34a, in which the hammer holding shaft 31 can be inserted and removed, and the hammer holding shaft 31 is inserted into the fitting hole 34a through the insertion opening 34b. Thus, it is configured to be rotatably attached to the hammer holding shaft 31.

  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 is in front of the hammer 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 into and fitted to the fitting hole 34 a by slightly expanding the 34 b 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 the 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. It is configured to be mounted on the 15th.

  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, in the mounting portion 33c, a guide hole 29 for guiding an interlocking projection 28 of the interlocking control unit 27 described later is provided.

  Further, as shown in FIGS. 2 and 3, the hammer arm 33 is configured to be restricted to the lower limit position, which is the initial position, when the lower end of the hammer arm 33 contacts the lower limit stopper 35 from above. That is, 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. Thereby, the hammer member 11 is configured to be position-regulated to the initial position in a state where the lower end of the hammer arm 33 abuts on the lower limit stopper 35 from the upper side, and in a state of being inclined downward to the rear.

  Further, as shown in FIGS. 7 and 9, in the hammer arm 33, the stopper abutment portion 43a for the white key and the stopper abutment portion 43b for the black key provided on the upper end of the rear end are upper limit stoppers. The upper limit position is configured to be restricted by abutting on the lower surface 37. That is, the lengths of the white key 2a and the black key 2b are different 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 and 6b on the front side and the cushion member 7 on the rear side, but the length by which the white key 2a pushes up the transmission member 10 And the black keys 2b have different lengths for pushing up the transmission member 10. 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 rotation amount (that is, the rotation angle) of the hammer member 11 rotates corresponding to the black key 2b. Less than the quantity (ie the rotation angle).

  In order to bring the hammer member 11 corresponding to the white key 2a and the hammer member 11 corresponding to the black key 2b into contact with the upper limit stopper 37 with the same amount of rotation (that is, the same rotation angle) It is necessary to adjust the protrusion height of the stopper contact portion 43a and the protrusion height of the black key stopper contact portion 43b. For this reason, 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. The black key stopper abutting portion 43 b is formed at a height protruding from the upper surface of the hammer arm 33.

  In this case, as shown in FIG. 9, the upper limit stopper 37 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. Thus, when the hammer arm 33 rotates clockwise about the hammer holding shaft 31 of the hammer holding member 13, the rear end upper portion of the hammer arm 33 abuts on the upper limit stopper 37 from below. The upper limit position is configured to be restricted.

  Further, as shown in FIGS. 2 and 9, a switch pressing portion 39 is formed on the upper end of the hammer arm 33 at the front end. A switch substrate 40 is disposed by a pair of substrate support rails 41 on the upper side corresponding to the switch pressing portion 39 of the hammer arm 33. Each of the pair of substrate support rails 41 is a long plate having an L-shaped cross section, and is formed to have a length extending along the entire length of the keys 2 in the arrangement direction.

  As shown in FIGS. 1 to 3, the pair of substrate support rails 41 are attached such that the horizontal portions thereof are separated on the substrate rail support portions 16 f of the plurality of support members 16 by a predetermined distance. The switch substrate 40 is divided into a plurality of parts as shown in FIG. That is, in this embodiment, the switch substrate 40 is divided into four, for example, and attached to the pair of substrate 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 contact with and releasably contact a plurality of fixed contacts (not shown) provided on the lower surface of the switch substrate 40 along the front-rear direction of the hammer arm 33 Is provided.

  Thereby, as shown in FIG. 9, the rubber switch 42 rotates clockwise around the hammer holding shaft 31 of the hammer holding member 13 and the switch pressing portion 39 of the hammer arm 33 When pressed, the inverted dome-like bulging portion 42a elastically deforms, and the plurality of movable contacts 42b sequentially contact the plurality of fixed contacts with time, thereby achieving the key pressing strength of the key 2 It is configured to output a corresponding switch signal. 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, as shown in FIGS. 2 and 3, the interlocking control section 27 is provided on the interlocking projection 28 provided on the support 22d of the transmission member 10 and on the mounting section 33c of the hammer 11 so that the interlocking projection 28 is formed. And a guide hole 29 for guiding the Thereby, the interlocking control unit 27 controls the rotation operation of the hammer member 11 accompanied by the rotation operation of the transmission member 10 corresponding to the key 2 operated by pressing the key by the relative operation of the interlocking projection 28 with respect to the guide hole 29 It is configured to

  That is, as shown in FIGS. 5 and 8, the interlocking projection 28 of the interlocking control unit 27 includes a rod-like projection main body 28a and a cylindrical buffer 28b provided on the outer periphery of the projection 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 projection main body 28 a is integrally formed in a state where it protrudes in the arrangement direction of the keys 2 on the front end upper portion of the support portion 22 d provided in the transmission main body portion 22 of the transmission member 10. It is configured to be movably inserted into a guide hole 29 provided in the mounting portion 33 c of the hammer member 11. A hook portion 28c is annularly formed on the outer periphery of the tip of the projection main body 28a.

  The buffer portion 28 b is made of an elastic synthetic resin such as a urethane resin or a 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 substantially the same as the outer diameter of the projection main body 28a, and an axial length thereof is an axial length of the projection main body 28a, that is, between the support portion 22d and the hook portion 28c. It is formed in the same length as the length between.

  Further, as shown in FIG. 8A to FIG. 8C, a sliding protrusion 28d to be in contact with the support portion 22d is formed in a hook shape at one end portion of the buffer portion 28b. Thereby, when the buffer portion 28b is mounted on the outer periphery of the protrusion main body 28a, the hook-like 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 the support portion 22d and the hook portion 28c, it is configured to be attached to the projection main body 28a.

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

  That is, as shown in FIG. 3, FIG. 8 (a) and FIG. 9, the guide hole 29 is provided such that the center line in the longitudinal direction is inclined rearward and downward (leftward in FIG. 3). Further, the length (hole width) of the guide hole 29 in the direction orthogonal to the longitudinal direction is substantially the same as the outer diameter of the interlocking projection 28, that is, the outer diameter of the buffer portion 28b. The length of the interlocking projection 28 is about 1.5 to 2 times the outer diameter of the interlocking projection 28.

  In this case, as shown in FIG. 3, FIG. 8 (a) and FIG. 9, the guide hole 29 is moved to the inner circumferential surface of the guide hole 29 when moving in the state where the interlocking projection 28 is inserted therein. The buffer portion 28b of the interlocking projection 28 elastically contacts and moves, and the sliding projection 28d of the buffer portion 28b elastically contacts 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 interlocking control unit 27 causes the transmission member 10 corresponding to the key 2 operated to be depressed to rotate, and the hammer member 11 is rotated along with the rotation operation 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, when the key 2 is depressed and the transmission member 10 rotates counterclockwise around the transmission holding shaft 21, the interlock control unit 27 rotates the transmission member 10. 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, when the hammer member 11 is pushed up, the interlocking control unit 27 causes the interlocking projection 28 to move along the guide hole 29, thereby rotating the transmission member 10. 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 interlocked to perform the rotational operation.

  Further, as shown in FIG. 9, the interlocking control section 27 allows the interlocking projection 28 to be moved relative to the guide hole 29 when the key 2 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 configured to rotate counterclockwise about the hammer holding shaft 31 by its own weight. Yes.

  Furthermore, as shown in FIG. 3, when the transmission member 10 and the hammer member 11 return to the initial position, the interlocking control unit 27 moves the interlocking projection 28 toward the upper end of the 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 the initial state in which no key depression operation is performed, the transmission member 10 rotates clockwise about the transmission holding shaft 21 of the transmission holding member 12 by its own weight to transmit the transmission main body A transmission felt 25 provided on the lower surface of the housing 22 abuts on 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 plate member 22a of the transmission main body 22 and the formation density of the plurality of first and second grid rib portions 22b and 22c is the key 2 The capstan 26 is added from above. Thereby, the key 2 is pushed by the transmission member 10 and rotates counterclockwise around the balance pins 4a and 4b, and the rear end of the key 2 abuts on the cushioning materials 6a and 6b, and the key 2 is in the initial position And the transmission member 10 is also regulated to the initial position.

  Further, at this time, the hammer member 11 rotates counterclockwise around the hammer holding shaft 31 of the hammer holding member 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 the free state in which the bulging portion 42 a is expanded, and is in the OFF state by separating the plurality of movable contacts 42 b from the fixed contacts (not shown).

Next, the case of playing by pressing the key 2 in such a state will be 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 plate member 22a of the transmission main body 22, which is the weight of the transmission member 10, and the formation density of the plurality of first and second grid rib portions 22b and 22c is a key 2 is applied as an initial load.

  As a result, the transmission member 10 rotates counterclockwise in FIG. 3 about 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 projection 28 abuts on the front end upper portion of the guide hole 29 with the rotation of the transmission member 10 and pushes up the front end upper portion of the guide hole 29.

  Thus, the hammer 11 rotates clockwise in FIG. 3 about 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 11 rotates clockwise around the hammer holding shaft 31 in FIG. 3, an action load is applied to the key 2 by the moment of inertia of the hammer 11. In this case, as shown in FIGS. 3 and 9, the hammer arm 33 is formed such that the length in the front-rear direction of the key 2 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. Therefore, when the hammer member 11 rotates clockwise about the hammer holding shaft 31, the hammer member An inertia moment is generated at 11. 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. Thereby, the key touch feeling similar to the key touch feeling of the acoustic piano can be obtained.

  When the hammer member 11 is thus rotated clockwise about the hammer holding shaft 31, as shown in FIG. 9, the switch pressing portion 39 of the hammer arm 33 is an inverted dome of the rubber switch 42 provided on the switch substrate 40. Is pressed from the lower side. 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. To generate a musical tone. Then, when the hammer member 11 further rotates clockwise about the hammer holding shaft 31, the hammer arm 33 abuts on the upper limit stopper 37 from the lower side, and the rotation of the hammer member 11 is regulated and stopped.

  At this time, for example, when the hammer member 11 corresponding to the white key 2 a rotates, the stopper contact portion 43 a for the white key of the hammer arm 33 abuts on the upper limit stopper 37 from the lower side. Further, when the hammer member 11 corresponding to the black key 2 b rotates, the black key stopper abutment portion 43 b of the hammer arm 33 abuts on the upper limit stopper 37 from the lower side.

  In this case, the stopper abutment 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 abutment portion 43b for the black key has a height projecting from the upper surface of the hammer arm 33. Is formed. Therefore, the white key 2a and the black key 2b have different lengths in the front-rear direction, and the hammer corresponding to the white key 2a is formed even if the length of the white key 2a is longer than the length of the black key 2b. The member 11 and the hammer member 11 corresponding to the black key 2b contact the upper limit stopper 37 with the same rotation amount (rotation angle). Further, the rotation amount of the white key may be slightly larger than the rotation amount of the black key as in a normal piano.

  Thereafter, when the key 2 starts the key release operation (return operation) in which the key 2 returns to the initial position, the transmission member 10 has its own weight while the interlocking projection 28 is movable relative to the guide hole 29. , And returns to the initial position, and the hammer member 11 rotates counterclockwise under its own weight to return 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 pushes up the transmission member 10 slowly. At this time, the weight set by the shape and thickness of the plate member 22a of the transmission main body 22, which is the weight of the transmission member 10, and the formation density of the plurality of first and second grid rib portions 22b and 22c Is applied to the key 2 as a dynamic load.

  As a result, the transmission member 10 is slowly rotated 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 is located at the upper front end of the guide hole 29. Push up slowly. Along with this, the hammer 11 slowly rotates clockwise about 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 make a switch operation, and the rear end upper portion of the hammer member 11 abuts against the upper limit stopper 37 from the lower side The rotation of 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 2 starts the key release operation (return operation) to return to the initial position, the transmission member 10 in a state where the interlocking projection 28 of the interlocking control unit 27 abuts or approaches the front end upper portion 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 device 1, when the key 2 is operated with a strong force, the key 2 rotates clockwise around the balance pins 4a and 4b at a high speed, and the capstan 26 of the key 2 is moved. Pushes the transmission member 10 fast. 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 plate member 22a of the transmission main body portion 22 and the formation density of the plurality of first and second grid rib portions 22b and 22c, the shape and thickness of the plate member 22a, and A dynamic load is generated according to the gravity center position G set by the formation positions of the plurality of first and second lattice rib portions 22b and 22c, and this dynamic load is applied to the key 2; It is also applied 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 projection 28 of the interlocking control unit 27 rapidly pushes up the upper end of the front end of the guide hole 29 at a high speed. For this reason, the hammer 11 rapidly rotates at a high speed clockwise around the hammer holding shaft 31 of the hammer holding member 13 to apply an action load to the key 2. At this time, when the rotational speed of the hammer member 11 is faster than the rotational speed of the transmission member 10, the front end upper portion of the guide hole 29 of the interlocking control unit 27 is separated from the interlocking projection 28 and the interlocking projection 28 is a guide hole 29. Move relatively toward the lower end of the inside.

  Then, the switch pressing portion 39 of the hammer member 11 rapidly presses the rubber switch 42 provided on the switch substrate 40 to perform the switch operation, and the rear end upper portion of the hammer member 11, that is, the stopper contact portion 43a for white key 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 projection 28 of the interlocking control unit 27 is relatively separated from the upper end 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 repulsion of the hammer member 11 is suppressed.

  Then, when the key 2 starts the key release operation (return operation) to return to the initial position, the interlocking projection 28 of the interlocking control unit 27 contacts the upper end of the front end of the guide hole 29 in a movable state along the guide hole 29. In this state, the transmission member 10 is rotated clockwise by its own weight to return to the initial position, and the hammer member 11 is rotated counterclockwise by its own weight to return to the initial position, and the key 2 is returned to the initial position.

  In addition, when one key 2 is continuously pressed and operated by the keyboard device 1, the key 2 is pressed once and the hammer member 11 is pushed up to reach the upper limit position, and the hammer is reached. 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. Therefore, 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 depressed again in the middle of the return operation of the key 2, the transmission member 10 on the way to the initial position is pushed up again by the capstan 26 of the key 2.

  Then, the return transmission member 10 rotates counterclockwise again about the transmission holding shaft 21. At this time, the interlocking projection 28 of the interlocking control unit 27 moves along the guide hole 29 to push up the upper front end of the guide hole 29. As a result, the hammer 11 in the process of returning to the initial position is again rotated clockwise about 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 continuously hit and operated, the return movement of the hammer member 11 and the return movement of the transmission member 10 are controlled by the relative movement of the interlocking projection 28 with respect to the guide hole 29 of the interlocking control unit 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 transmission members 10 provided corresponding to the plurality of keys 2 and displaced according to the key depression operation of the plurality of keys 2; The action load is applied to the key 2 operated by pressing the key 2 by rotating according to the displacement of the transmission member 10 provided corresponding to each of the plurality of keys 2 and corresponding to the key 2 operated by the key depression. And a plurality of hammer members 11 to be applied, and the transmission member 10 has a weight set according to the formation density of the plurality of first and second grid rib portions 22b and 22c formed on the transmission main body portion 22. By this, it is possible to obtain a good key touch with a simple structure.

  That is, in the keyboard device 1 of the electronic keyboard instrument, the weight of the transmission member 10 is set in accordance with the formation density of the plurality of first and second grid ribs 22 b and 22 c formed on the transmission main body 22. Therefore, the weight of the set transmission member 10 can be applied to the key 2 as a static load, whereby the initial load of the key 2 can be optimized, and at the time of key depression, the weight of the key 2 can be The key pressing force can be favorably transmitted to the hammer member 11 as a static load. Therefore, the structure is simple and a good key touch can be obtained.

  In this case, the transmission main body portion 22 is made of hard synthetic resin such as ABS resin, and the thin plate member 22a and a plurality of first grid members formed on the outer peripheral portion and both side surfaces of the plate member 22a. And the plurality of second grid rib portions 22c of fine grids further provided in a part of the grids. The weight of the transmission member 10 can be set by the formation density of the second grid-like rib portions 22b and 22c, and can be easily manufactured using a molding die.

  Further, according to the keyboard device 1 of the electronic keyboard instrument, the plurality of transmission members 10 provided corresponding to each of the plurality of keys 2 and displaced according to the key depression operation of each of the plurality of keys 2; The action load is applied to the key 2 operated by pressing the key 2 by rotating according to the displacement of the transmission member 10 provided corresponding to each of the keys 2 and operated by the key 2 operated. A plurality of hammer members 11 is provided, and the transmission member 10 has its center of gravity G set according to the formation positions of the plurality of first and second grid-like rib portions 22 b and 22 c formed on the transmission main body 22. By this, it is possible to obtain a good key touch with a simple structure.

  That is, in the keyboard device 1 of this electronic keyboard instrument, the gravity center position G of the transmission member 10 is set in accordance with the formation positions of the plurality of first and second grid rib portions 22b and 22c formed on the transmission main body 22. Therefore, when the transmission member 10 is displaced by the key 2 pressed, the plurality of first and second grid-like rib portions 22b and 22c formed on the transmission main body portion 22 are formed. According to the position of the center of gravity G of the transmission member 10, the dynamic load can be applied to the key 2 and the pressing force of the key 2 is favorably applied to the hammer member 11 as the dynamic load at the time of key depression. I can tell you. Therefore, good key touch can be obtained with a simple structure.

  Also in this case, the transmission main body portion 22 is made of hard synthetic resin such as ABS resin, and a thin plate member 22a and a plurality of grid members formed on the outer peripheral portion and both side surfaces of the plate member 22a. A plurality of first grid-like rib portions 22b and a plurality of fine grid-like second grid-like rib portions 22c provided in a portion of the grids among the grid-like portions. Depending on the formation states of the first and second grid rib portions 22b and 22c, that is, the formation positions of the plurality of fine second grid rib portions 22c provided on a part of the plurality of first grid rib portions 22b. The center-of-gravity position G of the transmission member 10 can be set at a position shifted from the central portion of the transmission main body 22, and can be easily manufactured using a molding die.

  Thus, in the keyboard device 1 of this electronic keyboard instrument, the weight of the transmission member 10 is set according to the formation density of the plurality of first and second grid rib portions 22 b and 22 c formed on the transmission main body 22. The barycentric position G of the transmission member 10 can be set according to the formation positions of the plurality of first and second lattice rib portions 22b and 22c formed on the transmission main body portion 22.

  Therefore, in the keyboard device 1, the weight of the transmission member 10 set can be applied to the key 2 as a static load and the key pressing force of the key 2 is used as a static load at the time of key depression. The load can be well transmitted to the hammer member 11, and when the transmission member 10 is displaced by the key 2 operated by the key depression, a dynamic load is applied to the key 2 by the set gravity position G of the transmission member 10. In addition, the key pressing force of the key 2 can be well transmitted to the hammer member 11 as a dynamic load when the key is pressed.

  In the embodiment described above, the transmission main body portion 22 includes a plurality of first grid-like rib portions 22b formed substantially in a grid shape on both side surfaces of the thin plate member 22a, and one of the grid shapes. Although the number of the ribs formed in the grid of the part is increased to further describe the configuration having the plurality of fine second grid-like rib parts 22c with square grids, the present invention is not limited to this. For example, you may comprise like a modification shown in FIG.

  That is, in the transmission main body 22 of this modification, a plurality of ribs 45b are formed in the form of a large grid at the lower side than the central part on both sides of the thin plate 45a, and both sides of the plate 45a are A plurality of rib portions 45c are formed on the upper side of the center portion in the shape of a small grid with a large number of ribs.

  In such a transmission main body portion 22, the weight of the transmission member 10 can be set according to the formation density of the plurality of rib portions 45b and 45c, so the set weight of the transmission member 10 is static with the key 2 An embodiment in which the center-of-gravity position G of the transmission member 10 is described according to the formation position of the plurality of first and second grid-like rib portions 22b and 22c formed on the transmission main body portion 22 while being applied as a load. Therefore, a dynamic load different from that of the above-described embodiment can be applied to the key 2.

  Further, the present invention is not limited to this, and the weight of the transmission member 10 may be set by changing the overall thickness of the plate members 22 a and 45 a of the transmission main body 22.

  Also, as shown in FIGS. 11 (a) and 11 (b), it is not necessary to increase the number of ribs formed in the lattice, but to place plates in other lattices in the lattice where the weight is to be increased. The weight of the transmission member 10 and the center-of-gravity position G may be set by providing a plate portion 22e having a thickness greater than that of the member 22a as the center-of-gravity position setting member of the present invention. Furthermore, it is also possible to change the plate member 22a in the lattice in the portion where the weight is to be increased to a member of a heavier material.

  Further, as shown in FIGS. 12 (a) and 12 (b), the transmission main body 22 is formed only by the plurality of first lattice rib portions 22b formed in a lattice shape, and it is desired to increase the weight. It is also possible to provide the plate member 22a as the center-of-gravity position setting member of the present invention only in a certain lattice, but not to provide a plate portion in the other lattices.

  Further, in the present embodiment, the weight of the rib portion is increased by increasing the number of ribs formed in a part of the lattice to form a plurality of finer rib portions, but the rib portion is formed. Instead of increasing the number of ribs, the individual ribs may be made thicker to increase the weight of the entire rib portion.

  Further, 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 attachment 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. It can be rotated 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.

  Therefore, also in the interlocking control unit 27, when the hammer member 11 rotates toward the initial position earlier than the transmission member 10, the interlocking projection 28 of the hammer member 11 is the rear end of the guide hole 29 of the transmission member 10. As it can be moved downward, the rotational movement of the hammer 11 can be controlled by the relative movement of the interlocking projection 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. Since the return operation of 10 can be controlled, and thereby the continuous hitting operation of continuously pressing one key 2 can be performed surely and favorably, 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 portion may be formed long along the relative movement trajectory of the interlocking projection portion 28.

  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, and may be provided, for example, in the form of a double-end support beam.

  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 is appended below.

(Supplementary note)
The invention according to claim 1 has a plurality of keys,
A plurality of action mechanisms provided corresponding to each of the plurality of keys;
Equipped with
Each of the plurality of action mechanisms includes:
A transmission member having a plurality of lattice-shaped rib portions formed in a lattice shape and an outer peripheral rib portion provided around the plurality of lattice-shaped rib portions, and being displaced in response to a key pressing operation of the key;
A hammer member that applies an action load to the key that is being key-pressed by displacing in the vertical direction according to the displacement of the transmission member that corresponds to the key that has been key-pressed;
Have
Furthermore, the plurality of grid-like rib portions include a plurality of first horizontal ribs that cross the inside of the outer peripheral rib portion, and a plurality of first longitudinal ribs that cross the inside of the outer peripheral rib orthogonal to the horizontal rib. A plurality of first grid-like rib portions having
A second grid having a second horizontal rib traversing the inside of a part of the grids and a second longitudinal rib crossing the inside of the grid among the plurality of grids formed by the plurality of first grid ribs It is a keyboard apparatus which has the shape rib part.

The invention according to claim 2 is the keyboard apparatus according to claim 1, further comprising a transmission holding shaft for rotatably holding the transmission member in the keyboard apparatus according to any one of claims 1 to 4. Prepared,
The transmission member is a keyboard device further including a transmission fitting portion formed at one end of the transmission main body portion and rotatably attached to the transmission holding shaft.

  The invention according to a third aspect is the keyboard device according to the second aspect, wherein a unit of the plurality of grid-like rib portions is formed in accordance with the position of the transmission member having a different distance from the transmission fitting portion. It is a keyboard device with different weights per area.

  The invention according to a fourth aspect is the keyboard device according to the second or third aspect, wherein the plurality of grid rib portions have a plurality of the second grid rib portions, and the plurality of second grid ribs are provided. Each of the rib portions is provided in two grids located below the central portion of the transmission member, and in the grid at a position where the distance from the transmission fitting portion is longer than the distance to the central portion of the transmission member. This is a keyboard device.

  The invention according to claim 5 is the keyboard apparatus according to any one of claims 1 to 4, wherein the weights of the plurality of grid-like rib portions formed per unit area are determined according to the position of the transmission member. Different keyboard devices.

  The invention according to a sixth aspect is the keyboard device according to any one of the first to fifth aspects, wherein the formation density of the plurality of grid-like rib portions formed per unit area is determined according to the position of the transmission member. Different keyboard devices.

  The invention according to claim 7 is the keyboard apparatus according to any one of claims 1 to 6, further comprising a plate member filling the inside of at least a part of the plurality of grids.

  The invention according to claim 8 is the keyboard apparatus according to claim 7, wherein the plate member is integrally formed with the plurality of grid rib portions surrounding the plate member.

The invention according to claim 9 has a plurality of keys,
A plurality of action mechanisms provided corresponding to each of the plurality of keys;
Equipped with
Each of the plurality of action mechanisms includes:
A transmission member having a plurality of lattice-shaped rib portions formed in a lattice shape and an outer peripheral rib portion provided around the plurality of lattice-shaped rib portions, and being displaced in response to a key pressing operation of the key;
A hammer member that applies an action load to the key that is being key-pressed by displacing in the vertical direction according to the displacement of the transmission member that corresponds to the key that has been key-pressed;
Have
Furthermore, the plurality of grid-like rib portions are a plurality of first transverse ribs that cross the inside of the outer circumferential rib portion, and a plurality of first transverse ribs that cross the inside of the outer circumferential rib portion perpendicularly to the first transverse rib. With vertical ribs,
In the keyboard device, a plate member is provided in at least a part of a plurality of grids formed by the plurality of grid-like rib portions.

  The invention according to a tenth aspect is the keyboard device according to the ninth aspect, wherein the plate member is integrally formed with the plurality of grid rib portions surrounding the plate member.

  According to an eleventh aspect of the present invention, in the keyboard device according to the ninth or tenth aspect, a plate member is provided in each of the plurality of lattices formed by the plurality of lattice rib portions, and Among them, the keyboard device is one in which the weight of the plate member provided in the part of the grid is different from that of the plate members provided in the other grid.

  A twelfth aspect of the invention includes the keyboard device according to any one of the first to sixth aspects, and a sound generation unit that generates a musical sound in response to an operation of the key of the keyboard device. It is a keyboard instrument.

Reference Signs List 1 keyboard device 2 key 3 action mechanism 10 transmission member 11 hammer member 12 transmission holding member 13 hammer holding member 21 transmission holding shaft 22 transmission main body 22a, 32a, 45a plate member 22b, 22c, 45b, 45c rib 23 transmission fitting Part 27 interlocking control part 28 interlocking projection part 28a projection main body 28b buffer part 28c hook part 28d sliding projection 29 guide hole 31 hammer holding shaft 32 hammer part 33 hammer arm 33c attachment part 34 hammer fitting part 43a, 43b stopper abutment part

Claims (10)

Multiple keys,
A transmission member having a plurality of grid-like rib portions in which ribs are formed in a grid shape, and displaced in response to a key depression operation of the key;
A hammer member that applies an action load to the key that is being key-pressed by displacing in the vertical direction according to the displacement of the transmission member that corresponds to the key that has been key-pressed;
Have
The plurality of grid-like rib portions extend along the inside of the transmission member in a first direction, and the inside of the transmission member extends in a second direction different from the first direction to form the plurality of first ribs. It is formed of a plurality of second ribs intersecting with each of the ribs,
In a part of the plurality of lattices formed by the plurality of lattice rib portions, a third rib different from any of the first rib and the second rib, or a plate portion in another lattice A keyboard device in which a heavier plate portion is formed . 2. The keyboard according to claim 1, wherein the third rib is provided in the partial lattice so as to form a finer mesh than a mesh formed by the first rib and the second rib. apparatus. The plurality of first ribs are provided to cross the inside of the transmission member,
The plurality of second ribs are provided to cross the inside of the transmission member perpendicularly to the plurality of first ribs, respectively.
3. The keyboard device according to claim 1, wherein the third rib has a transverse rib traversing the inside of the part of the grid and a longitudinal rib running along the inside of the part grid. 4. The keyboard device according to claim 1, wherein a plate portion having a larger thickness than a plate portion in another grid is formed in the part of the grids. The keyboard device according to claim 1, wherein a plate portion of a material having a weight greater than that of the plate portion in another lattice is formed in the part of the lattices. The barycentric position of the transmission member can be changed according to the number of ribs formed on the transmission member or the position of the rib formed on the transmission member. Keyboard device. Multiple keys,
A transmission member having a plurality of grid-like rib portions in which ribs are formed in a grid shape, and displaced in response to a key depression operation of the key;
A hammer member that applies an action load to the key that is being key-pressed by displacing in the vertical direction according to the displacement of the transmission member that corresponds to the key that has been key-pressed;
A transmission holding shaft rotatably holding the transmission member;
Have
The transmission member has a transmission fitting portion formed at one end of the transmission member and rotatably attached to the transmission holding shaft.
The plurality of grid-like rib portions are in a grid-like shape such that the plurality of first grid-like rib portions in which the plurality of ribs are formed in a grid-like shape and the grids are finer than the first grid-like rib portion And a plurality of second grid-like rib portions in which a plurality of ribs are formed,
Each of the plurality of second grid rib portions is located in the grid located below the central portion of the transmission member and at a position where the distance from the transmission fitting portion is longer than the distance to the central portion of the transmission member Ru is formed into a certain lattice, the keyboard apparatus. The transmission member further includes an outer circumferential rib portion provided around the plurality of lattice rib portions,
The plurality of first ribs are provided to cross the inside of the outer peripheral rib portion,
The keyboard device according to claim 1 , wherein the plurality of second ribs are provided so as to cut through the inside of the outer peripheral rib portion. The keyboard device according to claim 1 , wherein the transmission member includes a vertical plate portion and ribs formed in a lattice shape on the vertical plate portion. A keyboard device according to any one of claims 1 to 9 .
A sound generator for generating a musical tone in response to the operation of the key of the keyboard device;
A keyboard instrument characterized by comprising.

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