JP7329075B2 - keyboard device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard device, and more particularly to a keyboard device capable of imparting a playing feeling similar to that of an acoustic piano.

As shown in FIG. 1 of Patent Document 1, the center of rotation 2 of the keys of an acoustic piano is positioned on the rear end side, which is relatively distant from the front ends (on the player's side) of the keys. Therefore, when a key of the acoustic piano is pressed, the rear end portion of the key (region where the key can be pressed) is also displaced so as to sink downward by a predetermined amount.

On the other hand, Patent Document 1 describes a keyboard instrument in which keys are rotated along an arcuate surface of a rotation support portion 27, as shown in FIG. In this keyboard instrument, the center O of the circular arc surface of the rotary support portion 27, that is, the center of rotation O of the key is located behind the rear end of the key, so that the stroke of the rear end of the key when the key is depressed is reduced. (the amount of downward displacement) can be easily ensured. Therefore, it is possible to give a playing feeling similar to that of an acoustic piano.

Japanese Patent Laid-Open No. 02-167594 (for example, page 2, column 5, lines 2 to 17, figures 1 and 2) JP-A-10-240225 (for example, paragraphs 0025 and 0026, FIGS. 2 and 3)

On the other hand, Patent Literature 2 describes a keyboard instrument in which keys are rocked by elastic deformation of a hinge (hinge portion 13). In this type of keyboard instrument, it is difficult to ensure the stroke of the rear end portion of the key near the hinge, so there is a problem that it is difficult to provide a playing feeling similar to that of an acoustic piano.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a keyboard device capable of imparting a playing feeling similar to that of an acoustic piano even when keys are rocked by elastic deformation of hinges. purpose.

In order to achieve this object, the keyboard device of the present invention comprises: a support member ; a plurality of hinges connected to the support member and formed in a plate shape that curves upward or downward; a plurality of keys connected and swingably supported by the support member due to elastic deformation of the hinges ; The key depression stopper comprises at least a first key depression stopper positioned on the rear end side of the key and a second key depression stopper positioned on the front end side of the key. The amount of displacement of the rear end side of the key until the displacement is restricted by the first key depression stopper is set smaller for the white key than for the black key.
The keyboard device of the present invention comprises a support member, a plurality of hinges connected to the support member and formed in a plate shape that curves upwards or downwards, and a rear end connected to the plurality of hinges for elastic deformation of the hinges. a plurality of keys swingably supported by the support member, the keys being composed of a white key and a black key; the hinge being a white key hinge to which the white keys are connected; and a black key hinge to which a black key is connected, and the rigidity of the black key hinge is set smaller than that of the white key hinge.
The keyboard device of the present invention comprises a support member, a plurality of hinges connected to the support member and formed in a plate shape that curves upwards or downwards, and a rear end connected to the plurality of hinges for elastic deformation of the hinges. a plurality of keys swingably supported by the support member; a return means for imparting a return force for returning the keys to their initial positions before key depression; and a chassis having a through hole. a pair of key release stoppers configured to be capable of regulating the upward displacement of the key and separated by a predetermined distance in the front-rear direction of the key; The key release stopper has a base that protrudes downward from the key and is inserted into the through hole, and a bent portion that is bent in a direction perpendicular to the direction in which the base protrudes and is hooked on the lower surface of the chassis. The front-back displacement of the key is restricted by the engagement between the base portion and the through hole, and the upward displacement of the key is restricted by the engagement between the bent portion and the lower surface of the chassis.

(a) is a top view of the keyboard device in one embodiment, and (b) is a perspective view of the keyboard device. 2 is a cross-sectional view of the keyboard device taken along line II-II of FIG. 1(a); FIG. 3 is a cross-sectional view of the keyboard device showing a state in which a white key is pressed from the state of FIG. 2; FIG. FIG. 3 is a partially enlarged cross-sectional view of the keyboard device, enlarging the IV portion of FIG. 2;

Preferred embodiments are described below with reference to the accompanying drawings. First, referring to FIG. 1, the overall configuration of the keyboard device 1 will be described. FIG. 1(a) is a top view of a keyboard device 1 according to an embodiment, and FIG. 1(b) is a perspective view of the keyboard device 1. FIG.

FIG. 1(b) shows the keyboard device 1 with the panel 3 (see FIG. 1(a)) removed, and only partially shows the portion corresponding to one octave. Arrows UD direction, FB direction, and LR direction in FIG. 1 indicate the vertical direction, the front-back direction, and the left-right direction of the keyboard device 1, respectively, and the same applies to subsequent drawings.

As shown in FIG. 1(a), the keyboard device 1 is a keyboard instrument (electronic piano) including a plurality of (88 in this embodiment) keys 2 and a panel 3 surrounding the plurality of keys 2. ). The keys 2 include a plurality of (52 in this embodiment) white keys 10 for playing root tones, a plurality of (36 in this embodiment) black keys 20 for playing derivative tones, A plurality of white keys 10 and black keys 20 are arranged side by side (in the direction of arrows LR).

The panel 3 includes a front panel 3a, a rear panel 3b arranged to face the front panel 3a in the front-rear direction (arrow FB direction), and a pair of connecting the left-right ends of the front panel 3a and the rear panel 3b. The white key 10 and the black key 20 are surrounded by the front panel 3a, the rear panel 3b and the pair of end panels 3c.

On the upper surface of the rear panel 3b, for example, a display device formed of an LED or a liquid crystal display for displaying various states, a plurality of operators for adjusting the volume, changing the mode, etc. are provided (all not shown). A power switch, a plurality of jacks for inputting/outputting MIDI signals and audio signals, and the like are provided on the rear surface of the rear panel 3b (none of which are shown).

As shown in FIG. 1(b), the keyboard device 1 is provided with a plate-shaped bottom plate 4 made of synthetic resin, steel plate, or the like, extending in the left-right direction (directions of arrows LR). A chassis 5 for supporting the key 2 is fixed on the upper surface of the bottom plate 4 .

The chassis 5 includes a pair of legs 50 spaced apart in the front-rear direction (in the direction of the arrow FB), and a support portion 51 connecting the upper ends of the pair of legs 50 in the front-rear direction. Each part (the leg part 50 and the support part 51) of the chassis 5 is formed in a plate shape using a synthetic resin, a steel plate, or the like, and the chassis 5 has a space between the support part 51 and the bottom plate 4 when viewed in the left-right direction. It is formed in a U shape (C shape).

A white key unit 110 in which white keys 10 forming one octave are unitized, and a black key unit 120 in which black keys 20 forming one octave are unitized are supported on the upper surface of the supporting portion 51 . . Although not shown, the keyboard device 1 is provided with a plurality of white key units 110 and black key units 120 arranged side by side.

The white key unit 110 includes an upper support member 111 fixed to the upper surface of a lower support member 121 to be described later, a white key hinge 112 connected to the upper support member 111, and a white key connected to the white key hinge 112. 10, and the upper support member 111, the white key hinge 112, and the white key 10 are integrally formed using a resin material.

The upper support member 111 is formed in a plate-like shape extending left and right, and a plurality of white key hinges 112 are connected to the upper support member 111 so as to be aligned left and right. The white key hinge 112 is a plate-like body formed in a curved shape that protrudes upward (toward the arrow U). The elastic deformation allows the white key 10 to rotate (swing) with respect to the upper support member 111 . The curved plate-shaped white key hinge 112 is more flexible than the flat plate-shaped hinge that extends back and forth. quantity) can be easily secured. Therefore, it is possible to give a playing feeling similar to that of an acoustic piano.

The black key unit 120 includes a lower support member 121 fixed to the upper surface of the support portion 51 of the chassis 5, a black key hinge 122 connected to the lower support member 121, and a black key connected to the black key hinge 122. 20, and the lower support member 121, the black key hinge 122, and the black key 20 are integrally formed using a resin material.

The lower support member 121 is formed in a plate shape extending in the left and right direction, and a plurality of black key hinges 122 are connected to the lower support member 121 so as to be aligned in the left and right direction. The black key hinge 122 is a plate-like body formed in a curved shape that protrudes upward. Since the rear end of the black key 20 is connected to this black key hinge 122, the elastic deformation of the black key hinge 122 supports the lower stage. The rotation (swing) of the black key 20 with respect to the member 121 is possible. The curved plate-shaped black key hinge 122 is more flexible than a flat plate-shaped hinge extending back and forth, so that the stroke of the rear end portion (the end on the arrow B side) of the black key 20 can be easily secured when the key is pressed. . Therefore, it is possible to give a playing feeling similar to that of an acoustic piano.

Here, for example, even if the hinge is in the form of a flat plate extending in the front-rear direction, if the thickness of the hinge is reduced or the length of the hinge in the front-rear direction is increased, the rear end portions of the white key 10 and the black key 20 can be adjusted. stroke can be secured. However, such a configuration causes a problem that the durability of the hinge is lowered and a problem that the arrangement space of the white key unit 110 and the black key unit 120 in the front-rear direction increases.

On the other hand, in this embodiment, since the white key hinge 112 and the black key hinge 122 are in the shape of a curved plate, the white key 10 and the black key 20 are formed without thinning the white key hinge 112 and the black key hinge 122 . The stroke of the rear end part of can be secured. Therefore, the durability of the white key hinge 112 and the black key hinge 122 can be ensured. Furthermore, since the white-key hinge 112 and the black-key hinge 122 are in the shape of curved plates, the length of each hinge can be increased while the front-rear dimension of the white-key hinge 112 and the black-key hinge 122 can be shortened. . Therefore, the strokes of the rear end portions of the white keys 10 and the black keys 20 can be ensured while reducing the space for arranging the white key unit 110 and the black key unit 120 in the front-rear direction.

As described above, in this embodiment, since the white key hinges 112 and the black key hinges 122 are formed in curved plate shapes, the strokes of the rear end portions of the white keys 10 and the black keys 20 can be ensured, while the white key hinges 112 and 122 can be The key hinges 112 and black key hinges 122 are likely to bend, and the postures of the white keys 10 and black keys 20 before and during key depression tend to become unstable. On the other hand, the present embodiment adopts a configuration capable of stabilizing the postures of the white keys 10 and the black keys 20 . This configuration will be described with reference to FIGS. 2 and 3. FIG.

2 is a cross-sectional view of the keyboard device 1 taken along line II-II in FIG. 1(a), and FIG. 3 is a cross-sectional view of the keyboard device 1 showing a state in which the white key 10 is pressed from the state shown in FIG. is. 2 and 3 omit the illustration of a part of the keyboard device 1 (for example, the panel 3, etc.) in order to simplify the drawings, and FIG. , the illustration of the white keys 10 and the black keys 20 is omitted.

A structure for rotatably supporting the black key 20 by elastic deformation of the hinge, a structure for rotating the hammer 7 in conjunction with key depression or key release of the black key 20, and a structure when the black key 20 is pressed or released. The structure that regulates (guides) the displacement of is substantially the same as that of the white key 10 . Therefore, the actions and effects of the configuration of the white keys 10 to be described below are similarly exhibited in the black keys 20 as well.

As shown in FIGS. 2 and 3, a guide member 6 for guiding the displacement of the white keys 10 and the black keys 20 is fixed to the support portion 51 of the chassis 5 . The guide member 6 includes a top plate 60 fixed to the lower surface of the support portion 51 and a columnar guide 61 projecting upward from the top surface of the top plate 60 . A through hole 51 a is formed in the support portion 51 of the chassis 5 , and the guide 61 is inserted into the through hole 51 a so that the guide 61 projects toward the lower surface of the white key 10 .

A guide hole 11 having an opening downward is formed in the lower surface of the white key 10, and a guide 61 is inserted into the guide hole 11. As shown in FIG. A slight gap is formed between the inner peripheral surface of the guide hole 11 and the outer peripheral surface of the guide 61 at the initial position (hereinafter referred to as the "initial position") shown in FIG. As a result, as shown in FIG. 3, when the white key hinge 112 is elastically deformed and the white key 10 is rotated by pressing the key, the white key 10 is displaced in the left-right direction (in the direction of the arrows LR) and The guide 61 can restrict the tipping (rolling of the white key 10 around the axis in the front-rear direction). Therefore, even if the white key hinge 112 is formed in a curved shape that is easy to bend, the white key 10 can be stably rotated when the key is depressed.

Since the guide 61 for regulating the lateral displacement of the white key 10 is positioned rearward of the center of the white key 10 in the longitudinal direction, the displacement of the white key 10 can be regulated in the vicinity of the white key hinge 112.例文帳に追加can be done. As a result, the white key 10 can be rotated more stably when the key is pressed.

A side plate 62 hangs downward from the lower surface of the top plate 60 of the guide member 6 , and the side plate 62 is provided below the boundary portion between the white keys 10 and the black keys 20 . Therefore, spaces defined by the side plates 62 are formed below the white keys 10 and the black keys 20, respectively.

A shaft 63 is horizontally laid between the side plates 62, and the hammer 7 is rotatably provided around the shaft 63. - 特許庁The hammer 7 is composed of a mass portion 70 for giving a feel when the white key 10 is pressed, and a pressing portion 71 for pressing the switch S when the white key 10 is pressed.

A portion of the hammer 7 on the front side (arrow F side) of the shaft 63 is a mass portion 70 , and a portion of the hammer 7 on the rear end side (arrow B side) of the shaft 63 is a pressing portion 71 . A receiving portion 72 that is recessed downward is formed on the upper surface of the pressing portion 71 , and a through hole 51 b is formed in the support portion 51 of the chassis 5 at a position vertically facing the receiving portion 72 .

A projecting portion 12 is formed downwardly projecting from the lower surface of the white key 10, and the projecting portion 12 is in contact with the receiving portion 72 of the hammer 7 through the through hole 51b. Therefore, when the white key 10 is depressed (see FIG. 3), the projection 12 of the white key 10 slides along the receiving portion 72, causing the hammer 7 to rotate about the shaft 63. The mass part 70 is displaced so as to be lifted. Since the mass part 70 has a weight sufficient to impart a feeling of key depression, the reaction force accompanying the rotation of the hammer 7 gives a feel (key depression feel) when the white key 10 is depressed. granted to.

On the other hand, when the white key 10 is pressed, the pressing portion 71 is displaced downward. As a result, the switch S is pushed by the pressing portion 71 . Key depression information (note information) of the white key 10 is detected by the ON/OFF operation of the switch S, and a tone signal based on the detection result is output to the outside. In addition, although the substrate 9 is fixed to the lower portion of the guide member 6 , the substrate 9 may be supported by the bottom plate 4 .

The state in which the switch S is pushed by the pressing portion 71 (the state in FIG. 3) is the key depression end position of the white key 10 , and the posture of the white key 10 at the key depression end position is the It is defined by cushioning materials 52 and 53 provided on the upper surface. That is, the downward displacement of the white key 10 when the key is depressed is restricted by the cushioning materials 52 and 53 .

More specifically, from the lower surface of the rear end (the end on the arrow B side) of the white key 10, a regulation projection 13 projecting downward is formed, and a cushioning material 52 is arranged below the regulation projection 13. . In addition, a cushioning material 53 is arranged below a portion of the white key 10 on the front end side (arrow F side) of the center in the front-rear direction and on the front side of the black key 20 . As a result, the downward displacement of the white key 10 during key depression can be regulated by the pair of cushioning members 52 and 53 separated in the front and rear directions, so that the posture of the white key 10 at the end position of key depression can be stabilized.

That is, for example, in the case of a configuration in which the downward displacement of the white key 10 is restricted by a single cushioning material, when the white key 10 is pressed at a position away from the cushioning material to the front side or the rear side, the key is pressed. The force of time may cause the white key 10 to rotate about the cushioning material at the key depression end position (because the white key hinge 112 is formed in a curved shape that is easily bent).

In contrast, in the present embodiment, the cushioning material 52 restricts the displacement of the rear end of the white key 10, and the cushioning material 53 restricts the displacement of the front end of the white key 10. Force is easily applied to the region between the pair of cushioning members 52 and 53 . As a result, it is possible to prevent the white key 10 from rotating around the cushioning members 52 and 53 due to the force of key depression, thereby stabilizing the posture of the white key 10 at the end position of the key depression.

In order to stabilize the posture of the white key 10 at the key depression end position, it is better to dispose the cushioning materials 52 and 53 at positions separated from each other in the front and rear direction. It is preferable to arrange it on the rear side of the keyable area. On the other hand, since it is practically difficult to place the cushioning material 53 forward of the region where the key can be pressed, it is preferable to place the cushioning material 53 forward of the front end of the black key 20. , the front end of the black key 20 and the front end of the white key 10, more preferably forward of the center in the front-rear direction.

In this way, the posture of the white key 10 at the key depression end position is defined by the cushioning materials 52 and 53. is set to be smaller than the facing distance between the That is, the amount of displacement of the rear end of the white key 10 until the displacement is restricted by the cushioning material 52 (from before key depression to the final position of key depression) is is set smaller than the displacement amount of the front end of the As a result, the stroke of the white key 10 to the end position of the key depression and the attitude (inclination) of the white key 10 at the end position of the key depression can be approximated to those of an acoustic piano.

The amount of displacement of the rear end of the white key 10 until the displacement is restricted by the cushioning material 52 is 45% or more and 55% or less of the amount of displacement of the front end of the white key 10 before the displacement is restricted by the cushioning material 53. is preferably set to As a result, the stroke of the white key 10 to the end position of the key depression and the attitude of the white key 10 at the end position of the key depression can be approximated to the keys of an acoustic piano.

On the other hand, when the white key 10 is pressed and then released, the weight of the mass portion 70 of the hammer 7 causes the hammer 7 to rotate so as to return to the initial position (state shown in FIG. 2), thereby pushing the white key 10 upward. A restoring force is applied from the hammer 7 . The upward displacement of the white key 10 due to the restoring force of the hammer 7 is restricted by key release stoppers 14 and 15 .

The key release stoppers 14 and 15 are composed of base portions 14a and 15a projecting downward from the lower surface of the white key 10, and bent portions that bend in a direction perpendicular to the projecting direction of the base portions 14a and 15a (rearward in this embodiment). 14b and 15b.

The bases 14a, 15a of the key release stoppers 14, 15 are inserted into the through holes 51a, 51c of the chassis 5 (see FIG. 1B for the through hole 51c). Cushioning materials 54 and 55 are adhered to the lower surface of the chassis 5 on the rear side of the through holes 51a and 51c. is caught.

That is, the upward displacement of the white key 10 when the key is released is restricted by the pair of cushioning members 54 and 55 . The key release stopper 14 and the cushioning material 54 are located rearward (arrow B side) of the center of the white key 10 in the front-rear direction, and the release stopper 15 and the cushioning material 55 are located from the center of the white key 10 in the front-rear direction. is located on the front side (arrow F side), the upward displacement of the white key 10 can be regulated by two points spaced apart in the front and rear direction. Thereby, the posture of the white key 10 at the initial position can be stabilized.

Here, for example, when the contact position between the protrusion 12 of the white key 10 and the receiving portion 72 of the hammer 7 (the position where the return force from the hammer 7 is applied) is positioned forward of the key release stopper 15 . , the white key 10 may tilt due to the restoring force applied from the hammer 7 . That is, since the curved white key hinge 112 is easily bent, when the restoring force from the hammer 7 is applied to the front side of the key release stopper 15, the white key 10 rotates around the cushioning material 55 as a fulcrum, and the white key 10 rotates. There is a risk that the key 10 will rotate so as to tilt downward (so that the bent portion 14b of the key release stopper 14 separates from the cushioning material 54).

On the other hand, in this embodiment, since the protrusion 12 is provided in the region between the pair of key release stoppers 14 and 15, the restoring force from the hammer 7 can be applied to this region. As a result, it is possible to prevent the white key 10 from rotating about the key release stoppers 14 and 15, thereby stabilizing the posture of the white key 10 at the initial position.

Further, the base portion 14a of the key release stopper 14 is inserted into the through hole 51a, and the base portion 14a is sandwiched between the inner surface of the through hole 51a (the surface facing the arrow F side) and the top plate 60 of the guide member 6. , the engagement between the base portion 14a, the through hole 51a, and the top plate 60 can restrict the displacement of the white key 10 in the front-rear direction. Therefore, even if the white key hinge 112 is formed in a curved shape that is easy to bend, the white key 10 can be stably rotated. As described above, since the lateral displacement of the white key 10 is restricted by the guides 61 , the longitudinal and lateral displacements of the white key 10 can be restricted by the key release stopper 14 and the guides 61 . Therefore, the white key 10 can be rotated more stably.

As described above, in the present embodiment, the white key 10 is prevented from moving forward and backward by the engagement between the base portion 14a of the key release stopper 14 and the through hole 51a, and the engagement between the bent portion 14b and the cushioning material 54 prevents the white key 10 from moving forward. Upward displacement is restricted. That is, the key release stopper 14 has a function of restricting upward displacement of the white key 10 and a function of restricting forward and backward displacement of the white key 10 . Therefore, the structure can be simplified as compared with the case where portions (members) having these functions are provided separately.

Here, since the rotation axis of the black keys of the acoustic piano is located on the rear side of the rotation axis of the white keys, the stroke of the rear end of the black keys to the final position of the key depression is It becomes larger than the stroke of the end part. On the other hand, the present embodiment is configured to reproduce the difference between these strokes. This configuration will be described with reference to FIG.

FIG. 4 is a partially enlarged cross-sectional view of the keyboard device 1, enlarging the IV portion of FIG. In FIG. 4, hatching of the white key unit and the black key unit is omitted for easy understanding. Also, in FIG. 4, the black key hinge 122 of the black key unit hidden by the white key unit and the restricting projection 21 of the black key are illustrated by dashed lines.

As shown in FIG. 4, the upper supporting member 111 to which the white keys 10 are connected is superimposed on the upper surface of the lower supporting member 121 to which the black keys are connected. It is fixed to the support portion 51 of the chassis 5 by being tightened together by (not shown).

Therefore, the total length of the black key hinge 122 (the length from the connection position with the lower support member 121 to the connection position with the black key) is longer than the total length of the white key hinge 112 by the thickness t of the upper support member 111. formed. As a result, the rigidity of the black key hinge 122 against bending when the key is pressed can be made smaller than that of the white key hinge 112, so that the stroke of the rear end portion of the black key 20 (see FIG. 1B) when the key is pressed can be reduced to that of the white key. Larger than 10 can be easily secured. Therefore, it is possible to give a playing feeling similar to that of an acoustic piano.

In this case, if the purpose is simply to lengthen the overall length of the black key hinge 122, the support member to which the black key hinge 122 is connected may be superimposed on the upper surface of the support member to which the white key hinge 112 is connected. good. However, in such a configuration, since the black key hinge 122 protrudes higher than the white key hinge 112 due to the length of the black key hinge 122, the arrangement space of the black key hinge 122 in the vertical direction increases.

On the other hand, in this embodiment, the upper support member 111 to which the white key hinge 112 is connected overlaps the upper surface of the lower support member 121 to which the black key hinge 122 is connected. As a result, even if the black key hinge 122 is formed longer than the white key hinge 112, the upper end of the black key hinge 122 can be aligned with the upper end of the white key hinge 112.例文帳に追加Thereby, the arrangement space of the black key hinge 122 in the vertical direction can be reduced.

A restricting projection 21 protrudes downward from the lower surface of the rear end portion of the black key, and a cushioning material 52 is arranged below the restricting projection 21. The projecting dimension of the restricting projection 21 of the black key is It is formed shorter than the projecting dimension of the restricting protrusion 13 of the key 10 . In other words, the amount of displacement of the rear end of the white key 10 until it comes into contact with the cushioning material 52 is set smaller than the amount of displacement of the rear end of the black key. As a result, the stroke of the rear end portion of the black key up to the end position of the depressed key can be made larger than that of the white key 10, so that a playing feeling similar to that of an acoustic piano can be imparted.

Although the above has been described based on the above embodiments, the present invention is not limited to the above embodiments, and it is easily conjectured that various improvements and modifications can be made without departing from the scope of the present invention. It is possible.

In the above embodiment, the case where the keyboard device 1 is configured as an electronic piano has been described, but it is not necessarily limited to this. For example, the technical ideas of the above embodiments can also be applied to other electronic musical instruments (eg, electronic organ, synthesizer, accordion, etc.).

In the above embodiment, the hammer 7 is exemplified as the return means for returning the key 2 to the initial position before the key is depressed, but the return means is not necessarily limited to this. For example, an elastic body such as a spring may be used to return the key 2 to its initial position.

In the above embodiment, the key release stopper 14 was exemplified as an example of the first restricting means for restricting the longitudinal displacement of the key 2, but the present invention is not necessarily limited to this. For example, a hole (recess) is formed on one side of the key 2 or the chassis 5, and a protrusion inserted into the hole is formed on the other side, and the front and rear displacement of the key 2 is caused by the contact between the inner surface of the hole and the protrusion. can be regulated.

Further, since the longitudinal displacement of the key 2 can be generally restricted by the guide 61 as well, the configuration in which the longitudinal displacement of the key 2 is restricted only by the guide 61 may be employed. Alternatively, the gap between the base portion 15a of the key release stopper 15 and the inner surface of the through hole 51c may be made small enough to restrict the longitudinal displacement of the key 2, and the key release stopper 15 may restrict the longitudinal displacement of the key 2. .

That is, the first restricting means may be composed of something other than the key release stopper 14 as long as it is configured to restrict the forward and backward displacement of the key 2, and in addition to the key release stopper 14, another restricting means may be provided. But it's okay.

In the above embodiment, the white key 10 (black key 20), the white key hinge 112 (black key hinge 122), and the upper support member 111 (lower support member 121) are integrally formed using a resin material. Although the case has been described, it is not necessarily limited to this. For example, the white and black keys, the hinge, and the support member (or part of them) may be separate members and connected using known connecting means (eg, adhesion, screws, etc.).

In the above embodiment, the pair of key release stoppers 14 and 15 restricts the upward displacement of the key 2, but the present invention is not limited to this. For example, the number of key release stoppers provided for the key 2 may be one, or three or more.

In the above embodiment, the stroke of the rear end portion of the black key 20 can be changed by adjusting the projection length (distance to the cushioning material 52) of the restricting protrusion 13 of the white key 10 and the restricting protrusion 21 of the black key 20. Although the case of making it larger than is explained, it is not necessarily limited to this. For example, the projection lengths of the restricting protrusions 13 and 21 may be the same, and the stroke may be adjusted by adjusting the height and hardness of the cushioning material 52 . Alternatively, the strokes of the rear end portions of the white keys 10 and the black keys 20 may be set to be the same.

In the above-described embodiment, the cushioning materials 52 and 53 are illustrated as an example of the key depression stopper that restricts the downward displacement of the key 2, but the present invention is not necessarily limited to this. A configuration in which something other than the cushioning materials 52 and 53 (for example, columnar protrusions projecting upward from the chassis 5 side) may be provided, or a configuration in which the cushioning materials 52 and 53 are omitted may be employed. In the above-described embodiment, examples of materials for the cushioning materials 52 to 55 are omitted, but the cushioning materials 52 to 55 may be made of known materials such as felt and urethane foam.

In the above embodiment, the pair of front and rear cushioning materials 52 and 53 (key depression stoppers) restricts the downward displacement of the key 2, but the present invention is not limited to this. For example, the number of cushioning materials (key depression stoppers) may be one, or three or more.

In the above-described embodiment, the case where the lateral displacement and rolling of the key 2 are restricted by the guide 61 has been described, but the present invention is not necessarily limited to this. For example, the guide 61 may be omitted. If the guide 61 is omitted, it is preferable to separately provide a guide for restricting lateral displacement and tilting of the key release stoppers 14 and 15 . As a result, the key release stoppers 14 and 15 can have the function of restricting the upward displacement of the key 2 and the function of restricting the longitudinal and lateral displacement of the key 2 .

In the above embodiment, the case where the white key hinge 112 and the black key hinge 122 are formed in an upwardly convex curved shape has been described, but this is not necessarily the case. For example, the white key hinge 112 and the black key hinge 122 may be formed in a curved shape that protrudes downward.

In the above embodiment, the black key hinge 122 is made longer than the white key hinge 112 in order to reduce the rigidity against bending of the black key hinge 122, but the present invention is not limited to this. For example, the thickness of the black key hinge 122 may be reduced, or the black key hinge 122 may be provided with a hole to reduce the rigidity. Alternatively, the white key hinge 112 and the black key hinge 122 may have the same rigidity (total length).

Although the black key 20 is connected to the lower support member 121 in the above embodiment, it is not necessarily limited to this. For example, the structure may be such that the white keys 10 are connected to the lower support member 121 and the black keys 20 are connected to the upper support member 111 .

1 keyboard device 2 key 5 chassis 51a through hole 7 hammer (returning means)
10 white keys (keys)
14 key release stopper (first restricting means)
14a Base portion 14b Bent portion 15 Key release stopper 15a Base portion 15b Bent portion 20 Black key (key)
52 cushioning material (first key depression stopper)
53 cushioning material (second key depression stopper)
61 guide (second control means)
111 upper support member (support member)
121 lower support member (support member)
112 white key hinge (hinge)
122 black key hinge (hinge)

Claims (11)

a support member, a plurality of hinges connected to the support member and formed in a plate shape that curves upward or downward; a plurality of keys that can be supported ;
The key depression stopper comprises at least a first key depression stopper positioned on the rear end side of the key and a second key depression stopper positioned on the front end side of the key,
The key is composed of a white key and a black key,
A keyboard device, wherein the amount of displacement of the rear end side of the key until the displacement is restricted by the first key depression stopper is set smaller for the white key than for the black key. a support member, a plurality of hinges formed in a plate shape that are connected to the support member and curved upward or downward, and a rear end that is connected to the plurality of hinges so that the hinges are elastically deformed so that they can swing to the support member. a plurality of keys backed by
The key is composed of a white key and a black key,
The hinge is composed of a white key hinge to which the white key is connected and a black key hinge to which the black key is connected,
A keyboard device, wherein the rigidity of the black key hinge is set smaller than that of the white key hinge. a support member, a plurality of hinges formed in a plate shape that are connected to the support member and curved upward or downward, and a rear end that is connected to the plurality of hinges so that the hinges are elastically deformed so that they can swing to the support member. a plurality of keys to be supported by the key, return means for applying a return force to return the keys to the initial positions before key depression, and a chassis having a through hole,
The key includes a pair of key release stoppers configured to be able to restrict upward displacement of the key and separated by a predetermined distance in the front-rear direction of the key,
a restoring force is applied from the restoring means to a region between the pair of key release stoppers;
The key release stopper includes a base that protrudes downward from the key and is inserted into the through hole, and a bent portion that is bent in a direction perpendicular to the direction in which the base protrudes and is hooked on the lower surface of the chassis,
The engagement between the base portion and the through hole restricts displacement of the key in the front-rear direction, and the engagement between the bent portion and the lower surface of the chassis restricts the upward displacement of the key.
A keyboard device characterized by: 3. The keyboard device according to claim 1, further comprising first restricting means capable of restricting longitudinal displacement of said key. a second restricting means capable of restricting lateral displacement of the key;
5. The keyboard device according to claim 4 , wherein the second restricting means is provided on the rear side of the center of the key in the front-rear direction. a return means for applying a return force for returning the key to the initial position before the key is depressed;
The key includes a pair of key release stoppers configured to be able to restrict upward displacement of the key and separated by a predetermined distance in the front-rear direction of the key,
3. The keyboard device according to claim 1, wherein a restoring force is applied from said restoring means to a region between said pair of said key release stoppers. a key depression stopper capable of regulating downward displacement of the key when the key is depressed;
2. The key depression stopper comprises at least a first key depression stopper positioned on the rear end side of the key and a second key depression stopper positioned on the front end side of the key. Or the keyboard device according to 3 . The displacement amount of the rear end side of the key until the displacement is restricted by the first key depression stopper is smaller than the displacement amount of the front end side of the key until the displacement is restricted by the second key depression stopper. 8. The keyboard device according to claim 7 , wherein the keyboard device is set. The key is composed of a white key and a black key,
9. An amount of displacement of the rear end side of the key until displacement is restricted by the first key depression stopper is set smaller for the white key than for the black key . The keyboard device described in . The key is composed of a white key and a black key,
The hinge is composed of a white key hinge to which the white key is connected and a black key hinge to which the black key is connected,
10. The keyboard device according to claim 3 , wherein the rigidity of the black key hinge is set smaller than that of the white key hinge. The support member comprises at least a lower support member to which the black key hinge is connected, and an upper support member which is superimposed on the upper surface of the lower support member and to which the white key hinge is connected,
11. The overall length of the black key hinge from the lower support member to the black key is set longer than the overall length of the white key hinge from the upper support member to the white key. The keyboard device described in .

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