JP2015011145A - Keyboard device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a keyboard device capable of easily changing a key touch feeling of a plurality of keys according to a pitch with a simple structure without changing a shape of a plurality of keys. SOLUTION: A key body portion 5 is connected to a keyboard chassis 1 and a hinge portion 4 which is arranged in parallel on the keyboard chassis 1 and elastically deforms in a vertical direction to a connection fixing portion 3 fixed to the keyboard chassis 1 respectively. A plurality of formed keys 2 and a plurality of fulcrum portions 20 provided on the keyboard chassis 1 and in contact with the lower surfaces of the hinge portions 4 of the plurality of keys 2 are different from each other according to the pitches of the plurality of keys 2. And. Accordingly, the key pressing load of the plurality of keys 2 can be changed in accordance with the contact positions of the plurality of fulcrum portions 20 with respect to the lower surfaces of the hinge portions 4 of the plurality of keys 2. The feeling can be changed according to the pitch. [Selection] Figure 2

Description

  The present invention relates to a keyboard device for an electronic keyboard instrument such as an electronic piano or an electronic organ.

  For example, in an electronic keyboard instrument, as described in Patent Document 1, a plurality of keys are arranged on a keyboard chassis so as to be capable of rotating in the vertical direction, and the plurality of keys are respectively elasticized by the spring force of a leaf spring. There is known a configuration in which the key is pushed up and the key is pressed against the spring force of the leaf spring.

JP 07-271366 A

  In such an electronic keyboard instrument, one end of each leaf spring corresponding to a plurality of keys is locked to each key locking portion provided on the key, and the other end is each chassis provided on the keyboard chassis. Each key is elastically pushed up by being engaged with the engaging portion and curving each leaf spring in this state so as to have a convex shape.

  This type of electronic keyboard instrument is configured such that the key touch feeling changes according to the pitch of a plurality of keys by changing the installation state of the leaf spring corresponding to each key according to the pitch of each key. Yes. That is, in this electronic keyboard instrument, the vertical position of the key locking portion of each key to which one end portion of the leaf spring corresponding to each key is locked is changed according to the pitch, and the other end portion of the leaf spring is By providing the chassis locking part of the keyboard chassis to be locked at a certain position, the bending state of each leaf spring is changed according to the pitch, and thereby the spring force of each leaf spring is changed according to the pitch. Configured differently.

  For example, a high-frequency range key is formed with a high contact position of the key-locking portion, and a low-frequency range key is formed with a low-level contact position of the key-locking portion. By making it smaller than the spring force of the leaf spring, the key touch feeling in the high sound range becomes lighter than the key touch feeling in the low sound range.

  However, in such an electronic keyboard instrument, in order to change the key touch feeling according to the pitch of the key, the vertical position of the key locking portion of each key that locks one end of each leaf spring depends on the pitch. It is necessary to change the bending state of each leaf spring according to the pitch. For this reason, the key locking portions of the plurality of keys must be formed at different positions for each key, and the shapes of the plurality of keys differ from one another according to the pitch. For this reason, there is a problem that the production of each key becomes troublesome and complicated, and the production cost increases.

  The problem to be solved by the present invention is to provide a keyboard device that can easily change the key touch feeling of a plurality of keys according to the pitch with a simple structure without changing the shape of the plurality of keys. is there.

  The present invention relates to a keyboard chassis and a plurality of keys which are arranged in parallel on the keyboard chassis and each of which has a key body portion formed on a fixed portion fixed to the keyboard chassis via a hinge portion which is elastically deformed in the vertical direction. And a plurality of fulcrum portions that are provided on the keyboard chassis and that are in contact with the hinge portions of the plurality of keys, which are different from each other in accordance with the pitch of the plurality of keys. It is a keyboard device.

  According to the present invention, the key pressing load of the plurality of keys can be changed according to the contact positions of the plurality of fulcrum portions with respect to the hinge portions of the plurality of keys. It can be changed according to the height. For this reason, each key touch feeling of a plurality of keys can be easily changed by simply changing the contact positions of the plurality of fulcrum portions with respect to the hinge portions of the plurality of keys without changing the shape of the plurality of keys. It can be changed according to the pitch of the key. As a result, each key can be easily manufactured, the productivity of the entire apparatus is good, and the cost of the entire apparatus can be reduced.

In one Embodiment which applied this invention to the electronic keyboard musical instrument, it is the top view of the principal part which showed the state which removed some keys. It is an expanded sectional view of the principal part in the AA arrow of the electronic keyboard musical instrument shown by FIG. 2 shows the main part on the low frequency side of the electronic keyboard instrument shown in FIG. 2, (a) is an enlarged cross-sectional view of the main part, and (b) shows the key load with respect to the key pressing stroke in the key on the low frequency side. FIG. 2 shows the main part on the middle range side of the electronic keyboard instrument shown in FIG. 2, (a) is an enlarged cross-sectional view of the main part, and (b) shows the key load with respect to the keystroke stroke of the key on the middle range side. FIG. 2 shows the main part on the high-frequency region side of the electronic keyboard instrument shown in FIG. 2, (a) is an enlarged cross-sectional view of the main part, and (b) shows the key load with respect to the key stroke of the key on the high-frequency region side. FIG.

Hereinafter, an embodiment in which the present invention is applied to an electronic keyboard instrument will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the electronic keyboard instrument includes a keyboard chassis 1 that also serves as a lower case of the instrument case. A plurality of keys 2 are attached to the upper part of the keyboard chassis 1 so as to rotate in the vertical direction in a state where the keys 2 are arranged in parallel in the pitch order. The plurality of keys 2 include a white key and a black key. However, in this embodiment, a white key will be described.

  As shown in FIGS. 1 and 2, the key 2 includes a connection fixing portion 3 fixed on the keyboard chassis 1 and a hinge portion formed at the front end portion (right end portion in FIG. 2) of the connection fixing portion 3. 4 and a key body portion 5 formed at the front end portion (right end portion in FIG. 2) of the hinge portion 4. In the present embodiment, the hinge portion 4 and the key body 5 are configured so as to be integrally formed of synthetic resin, but both may be configured as separate members.

  As shown in FIG. 1, the connecting and fixing portion 3 is formed in a band plate shape that is continuous along the arrangement direction of the keys 2. A plurality of key main body portions 5 are integrally formed in a comb shape at a front end portion (lower side portion in FIG. 1) of the connection fixing portion 3 with a plurality of hinge portions 4 arranged in parallel. Yes. Further, as shown in FIG. 2, the connection fixing portion 3 is screwed on the rear portion (left side portion in FIG. 2) of the key support portion 6 provided at the upper rear end portion (left upper portion in FIG. 2) of the keyboard chassis 1. It is fixed by 6a.

  As shown in FIGS. 1 and 2, the hinge portion 4 is a thin plate-like thin portion, and from the front end portion (right end portion in FIG. 2) of the connection fixing portion 3 to the front side (in FIG. 2). Projecting toward the right side), and in this state, it is configured to be elastically deformed (bend deformation) in the vertical direction in response to a key pressing operation of the key body 5. The key body portion 5 is provided from the front end portion of the hinge portion 4 to a portion located above the front portion of the keyboard chassis 1.

  Thus, the key 2 is configured such that when the key body 5 is pressed in FIG. 2, the hinge 4 is elastically deformed in the vertical direction so that the key body 5 is rotated in the vertical direction. ing. In this case, a hinge restricting portion 7 is provided to protrude below the hinge portion 4 at the lower rear end (lower left end in FIG. 2) of the key body portion 5. The hinge restricting portion 7 is configured such that the lower end portion of the hinge restricting portion 7 abuts on the key support portion 6 of the keyboard chassis 1 when the key body portion is pressed and the hinge portion 4 is elastically deformed in FIG. It is configured.

  Further, as shown in FIG. 2, a key guide portion 8 provided upright on the front portion of the keyboard chassis 1 slides inside the front side of the key body 5 of the key 2 (inside the right side in FIG. 2). Inserted as possible. Thus, when the key 2 is pressed, the key guide portion 8 slides in the key body portion 5 relatively up and down to prevent the key 2 from shaking. Yes.

  Further, as shown in FIG. 2, a position restricting portion 9 for restricting the vertical position of the key 2 is provided at a substantially intermediate portion of the key body portion 5 of the key 2 so as to protrude downward. The position restricting portion 9 is provided at its lower portion with a protruding portion 9a protruding toward the rear (left side in FIG. 2) of the key 2, and the protruding portion 9a is an opening provided in the rising portion 10 of the keyboard chassis 1. It is configured to move up and down while being inserted into 10a.

  As shown in FIG. 2, when the key body 5 of the key 2 is pushed down, the position restricting portion 9 has the lower end of the position restricting portion 9 positioned below the opening 10 a in the rising portion 10 of the keyboard chassis 1. The lower limit stopper 11 provided is configured to come into contact with the upper side. As a result, the position restricting portion 9 is configured to restrict the lower limit position of the key body portion 5.

  Further, as shown in FIG. 2, when the key 2 that has been pressed is returned to the initial position, the position restricting portion 9 has an opening in the rising portion 10 of the keyboard chassis 1 so that the protruding portion 9a of the position restricting portion 9 is opened. It is comprised so that it may contact | abut from the lower side to the upper limit stopper 12 provided in the upper part of the part 10a. As a result, the position restricting portion 9 is configured to restrict the upper limit position of the key body portion 5.

  Further, as shown in FIG. 2, the key body 5 of the key 2 is provided with a switch pressing portion 13 that presses the switch portion 15 of the switch member 14 provided in the keyboard chassis 1. As shown in FIGS. 1 and 2, the switch member 14 is continuously provided along the arrangement direction of the keys 2 on the upper part of the keyboard chassis 1 in the middle in the front-rear direction (left-right direction in FIG. 2). It has been.

  As shown in FIGS. 1 and 2, the switch member 14 includes a switch board 16 attached on the keyboard chassis 1 and a switch attached on the switch board 16 and pressed by the switch pressing portion 13 of the key 2. Part 15. The switch substrate 16 is formed in a strip shape that is continuous along the direction in which the keys 2 are arranged. The switch board 16 is mounted on the keyboard chassis 1 by a board support part 17 that is provided between the key support part 6 at the rear end of the keyboard chassis 1 and the rising part 10 at the intermediate part. Yes.

  As shown in FIGS. 1 and 2, the switch unit 15 includes a rubber sheet 18 disposed on the switch substrate 16. The rubber sheet 18 has a length (width) shorter than the length of the switch substrate 16 in the front-rear direction (left-right direction in FIG. 2), and is formed in an elongated strip shape that is continuous along the arrangement direction of the keys 2. The rubber sheet 18 is formed with dome-shaped bulging portions 19 corresponding to the respective switch pressing portions 13 of the plurality of keys 2.

  As shown in FIG. 2, the dome-shaped bulging portion 19 pushes up the switch pressing portion 13 of the key 2 by a repulsive force that is an elastic restoring force, and resists the repulsive force. When it is pressed at 13, it is configured to be elastically deformed. In this case, a pair of movable contacts (both not shown) are provided in the dome-shaped bulging portion 19 so as to come into contact with and separate from a pair of fixed contacts provided on the upper surface of the switch substrate 16. .

  As a result, as shown in FIG. 2, when the dome-shaped bulging portion 19 provided on the rubber sheet 18 is pressed and elastically deformed by the switch pressing portion 13 of the key 2, the switch portion 15 moves into the bulging portion 19. The pair of movable contacts are configured to sequentially contact the pair of fixed contacts on the switch board 16. Accordingly, the switch unit 15 is configured to switch and output an electrical signal.

  On the key support portion 6 of the keyboard chassis 1, as shown in FIGS. 1 and 2, a plurality of fulcrum portions 20 that are in contact with the lower surfaces of the hinge portions 4 of the plurality of keys 2 are integrally provided. Yes. The support portion 20 serves as a fulcrum of the hinge portion 4 when the key body portion 5 of the key 2 is depressed and the hinge portion 4 is flexibly deformed, which is elastic deformation. Thereby, the support part 20 is comprised so that the length of the hinge part 4 to which the hinge part 4 bends and deforms, ie, the length in the front-back direction of the hinge part 4 to be bent, may be regulated, and the key pressing load of the key 2 may be set. .

  That is, as shown in FIGS. 1 to 5, the plurality of fulcrum portions 20 are gradually different from each other in the front-rear direction of the key 2 in contact positions with respect to the hinge portions 4 according to the pitches of the plurality of keys 2. . Among the plurality of fulcrum parts 20, each fulcrum part 20 on the bass side of the plurality of keys 2 is a front part of each hinge part 4 located on each key body part 5 side as shown in FIG. It is provided at a position corresponding to each side (right side in FIG. 3A).

  Further, each fulcrum portion 20 on the middle sound range side of the plurality of keys 2 is provided at a position corresponding to a substantially intermediate portion in the front-rear direction of each hinge portion 4 as shown in FIG. Similarly, each fulcrum portion 20 on the high-frequency range side of the plurality of keys 2 is, as shown in FIG. 5A, the rear side of each hinge portion 4 positioned on the connecting and fixing portion 3 side (in FIG. 5A). (Left side) is provided at a position corresponding to each.

  Thereby, as shown in FIG. 3A, the fulcrum portions 20 on the bass side of the plurality of keys 2 are connected to the respective fulcrum portions 20 from the front end portion (right end portion in FIG. 3A) of each hinge portion 4. Is set to be shorter than the distance L2 between the fulcrum portions 20 on the middle sound range side. Accordingly, each fulcrum portion 20 on the low sound range side has a region in which each hinge portion 4 bends and deforms, that is, a length in the front-rear direction in which each hinge portion 4 bends and deforms. It is set to be shorter than the length in the front-rear direction.

  For this reason, each fulcrum portion 20 on the low sound range side is set so that the length in the front-rear direction in which each hinge portion 4 is bent and deformed is shorter than the length in the front-rear direction in which each hinge portion 4 on the middle sound region side is bent and deformed. Therefore, the key pressing load of the key 2 is configured to be heavier than the key pressing load of the key 2 on the middle sound range side. In this case, each fulcrum portion 20 on the low sound range side has the shortest distance L1 of the fulcrum portion 20 located on the lowest sound side, and the distance L1 gradually increases toward the fulcrum portion 20 located on the middle sound range side. Is set.

  Further, as shown in FIG. 4A, each fulcrum portion 20 on the middle sound range side of the plurality of keys 2 extends from the front end portion (right end portion in FIG. 4A) to each fulcrum portion 20. Is set to be longer than the distance L1 between the fulcrum portions 20 on the low sound range side (L2> L1) and shorter than the distance L3 between the fulcrum portions 20 on the high sound range side. Accordingly, each fulcrum portion 20 on the middle sound region side has a region in which each hinge portion 4 is bent and deformed, that is, a length in the front-rear direction in which each hinge portion 4 is bent and deformed is that of each hinge portion 4 positioned on the low sound region side. The length is set to be longer than the length to bend and deform and to be shorter than the length to bend and deform of each hinge portion 4 located on the high sound range side.

  For this reason, each fulcrum portion 20 on the middle sound region side has a length in the front-rear direction in which each hinge portion 4 is bent and deformed is longer than a length in which each hinge portion 4 located on the low sound region side is bent and deformed, and the high sound region. Since each hinge part 4 located on the side is set to be shorter than the length to bend and deform, the key pushing load of the key 2 is lighter than the key pushing load of the key 2 located on the low sound side, and the high sound side. It is comprised so that it may become heavier than the key pressing load of the key 2 located in. Also in this case, each fulcrum part 20 on the middle sound range side has the shortest distance L2 of the fulcrum part 20 located on the lowest sound range side, and the distance L2 gradually increases toward the fulcrum part 20 located on the high sound side. Is set to

  Furthermore, each fulcrum portion 20 on the high-frequency range side of the plurality of keys 2 extends from the front end portion (right end portion in FIG. 5A) to each fulcrum portion 20 of each hinge portion 4 as shown in FIG. Is set to be longer than the distance L2 between the fulcrum portions 20 on the middle sound range side (L3> L2> L1). Accordingly, each fulcrum portion 20 on the high sound range side has a region where each hinge portion 4 is bent and deformed, that is, a length in the front-rear direction in which each hinge portion 4 is bent and deformed is that of each hinge portion 4 located on the middle sound region side. It is set to be longer than the length in the front-rear direction in which it bends and deforms.

  For this reason, each fulcrum portion 20 on the high sound range side is set such that the length in the front-rear direction in which each hinge portion 4 is bent and deformed is longer than the length in the front-rear direction in which each hinge portion 4 on the middle sound region side is bent and deformed. Therefore, the key pressing load of the key 2 is configured to be lighter than the key pressing load of the key 2 on the middle sound range side. Also in this case, each fulcrum part 20 on the high sound range side has the shortest distance L3 of the fulcrum part 20 positioned on the middle sound range side, and the distance L3 gradually increases toward the fulcrum part 20 positioned on the high sound side. Is set to

Next, the operation of such an electronic keyboard instrument will be described.
When the key body 5 of each of the plurality of keys 2 arranged on the keyboard chassis 1 is pressed, the hinge 4 of the key 2 that has been pressed is elastically deformed, and the key body 5 is pushed down. At this time, since the bending deformation, which is elastic deformation of the hinge portion 4, is regulated by the fulcrum portion 20, the key body 5 is pushed down with a key pressing load corresponding to the pitch.

  At this time, the pressed switch pressing portion 13 of the key body 5 presses the switch portion 15 of the switch member 14, and the dome-shaped bulging portion 19 of the switch portion 15 is elastically deformed, so that the bulging portion 19. The pair of movable contacts are sequentially brought into contact with the pair of fixed contacts on the switch board 16. As a result, the switch unit 15 performs a switching operation to output an electrical signal, and a musical tone is generated based on the output electrical signal.

  In this case, of the plurality of keys 2, for example, when the key 2 on the low sound range side is pressed and the hinge portion 4 is bent and deformed, as shown in FIG. The distance L1 from the front end portion (the right end portion in FIG. 3A) to the fulcrum portion 20 is shorter than the distances L2 and L3 on the middle sound region side and the high sound region side (L1 <L2 <L3). For this reason, the length in the front-rear direction in which the hinge portion 4 is bent and deformed is shorter than the length in the front-rear direction in which the hinge portions 4 on the middle sound range side and the high sound region side are bent and deformed, and the key pressing load of the key 2 is medium. It becomes heavier than each key pressing load on the sound range side and the high sound range side.

  As a result, the key load with respect to the key pressing stroke of the key body 5 in the key 2 on the low sound side shows characteristics as shown in FIG. That is, in the initial state of the key 2, the initial load F <b> 1 is applied to the key 2 by the elastic return force of the hinge portion 4. When the key 2 is pressed in this state, the hinge portion 4 is bent and deformed by the length of the distance L1 with the fulcrum portion 20 as a fulcrum as shown in FIG. For this reason, as shown in FIG.3 (b), a key load rises with a steep inclination angle.

  Then, as shown in FIG. 3B, when the key body 5 is pushed down and reaches the key pressing stroke S1, the switch pressing portion 14 of the key body 5 presses the bulging portion 19 of the switch portion 15. Elastically deform. For this reason, the key load further increases at a steep inclination angle. Thereafter, when the key body 5 is further pushed down to reach the key pressing stroke S2, the switch unit 15 performs a switching operation to start sound generation. At this time, the key load F2 becomes heavier than the respective key press loads F3 and F4 on the middle sound range side and the high sound range side which will be described later.

  In this state, when the key body 5 is further pushed down, as shown in FIG. 3B, the bulging portion 19 of the switch 15 is further elastically deformed, and the position restricting portion 9 of the key body 5 is moved to the keyboard. It contacts the lower limit stopper 11 of the chassis 1. For this reason, the key load increases more rapidly, and the pressing operation of the key body 5 is stopped at the key pressing stroke S3.

  When the hinge 2 is bent and deformed, for example, when the middle-range key 2 is pressed among the plurality of keys 2, the front end of the hinge 4 is shown in FIG. The distance L2 from the portion (right end in FIG. 4A) to the fulcrum 20 is longer than the distance L1 on the low sound range side (L2> L1) and shorter than the distance L3 on the high sound region side (L2 <L3). ).

  For this reason, the key 2 on the mid-range side has a length in the front-rear direction in which the hinge portion 4 bends and deforms longer than a length in the front-rear direction in which the hinge portion 4 on the low-frequency range deflects and deforms, and on the high sound range side. It becomes shorter than the length of the front-back direction in which the hinge part 4 bends and deforms. Thereby, the key pressing load of the key 2 is lighter than the key pressing load on the low sound region side and heavier than the key pressing load on the high sound region side.

  For this reason, the key load with respect to the keystroke stroke of the key body 5 in the key 2 on the middle sound range side exhibits characteristics as shown in FIG. That is, in the initial state of the key 2, the initial load F <b> 1 is applied to the key 2 by the elastic restoring force of the hinge portion 4, as with the key 2 on the low sound range side. When the key 2 is pressed in this state, as shown in FIG. 4 (a), the hinge portion 4 uses the fulcrum portion 20 as a fulcrum, and the distance L2 is longer than the distance L1 in the fulcrum portion 20 on the low frequency range side. Deforms and deforms at (L2> L1). For this reason, as shown in FIG. 4B, the key load rises at a gentler inclination angle than the key load on the low frequency range side.

  Then, as shown in FIG. 4B, when the key body 5 is pushed down and reaches the same key stroke S1 as the key body 5 on the low frequency range side, the switch pressing portion 14 of the key body 5 is switched. The bulging part 19 of the part 15 is pressed and elastically deformed. For this reason, the key load rises at a gentler inclination angle than the key load on the low sound range side. Thereafter, when the key main body 5 is further pushed down and reaches the same key pressing stroke S2 as the key main body 5 on the low sound range side, the switch unit 15 performs a switch operation to start sound generation. At this time, the key load F3 is lighter than the key load F2 on the low sound range side (F3 <F2).

  In this state, when the key body 5 is further pushed down, as shown in FIG. 4B, the bulging portion 19 of the switch 15 is further elastically deformed, and the position restricting portion 9 of the key body 5 is moved to the keyboard. It contacts the lower limit stopper 11 of the chassis 1. For this reason, the key load rises rapidly in the same way as the key load on the low sound range side, and the depressing operation of the key main body portion 5 stops at the same key depression stroke S3 as the key main body portion 5 on the low sound range side.

  Further, among the plurality of keys 2, for example, when the key 2 on the high sound range side is pressed and the hinge portion 4 is bent and deformed, as shown in FIG. The distance L3 from the portion (the right end portion in FIG. 5A) to the fulcrum portion 20 is longer than the distance L2 on the middle sound range side (L3> L2). For this reason, the length in the front-rear direction in which the hinge part 4 bends and deforms is longer than the length in the front-rear direction in which each hinge part 4 on the low-frequency region side and middle sound region side deflects and deforms, and the key pressing load of the key 2 is medium. It becomes even lighter than the key pressing load on the sound range side.

  For this reason, the key load with respect to the key pressing stroke of the key body 5 in the key 2 on the high sound range side exhibits characteristics as shown in FIG. That is, in the initial state of the key 2, the initial load F <b> 1 is applied to the key 2 by the elastic return force of the hinge portion 4, as with each key 2 on the low sound range side and the middle sound range side.

  When the key 2 is pressed in this state, as shown in FIG. 5 (a), the hinge portion 4 uses the fulcrum portion 20 as a fulcrum, and the distance L3 is longer than the distance L2 in the mid-range fulcrum portion 20. Deforms and deforms at (L3> L2). For this reason, as shown in FIG. 5B, the key load rises at a gentler inclination angle than the key load on the middle sound range side.

  Then, as shown in FIG. 5 (b), when the key body 5 is pushed down and reaches the same keystroke stroke S1 as each of the key bodies 5 on the low and middle ranges, the switch of the key body 5 is switched. The pressing part 14 presses the bulging part 19 of the switch part 15 and elastically deforms it. For this reason, the key load rises at a gentler inclination angle than the key load on the middle sound range side.

  Thereafter, when the key main body 5 is further pushed down and reaches the same key pressing stroke S2 as the key main body 5 on the low and middle ranges, the switch unit 15 performs a switch operation to start sound generation. To do. At this time, the key load F4 is lighter (F4 <F3 <F2) than the key load F3 on the middle sound range side.

  In this state, when the key body 5 is further pushed down, as shown in FIG. 5B, the bulging portion 19 of the switch 15 is further elastically deformed, and the position restricting portion 9 of the key body 5 is moved to the keyboard. It contacts the lower limit stopper 11 of the chassis 1. For this reason, the key load rises abruptly, like the key loads on the low and middle ranges, and the key body has the same keystroke stroke S3 as the key bodies 5 on the low and middle ranges. The pushing-down operation of the part 5 stops.

  As described above, according to the electronic keyboard instrument, the keyboard chassis 1 and the hinge portion 4 that is arranged in parallel on the keyboard chassis 1 and elastically deforms in the vertical direction to the connecting and fixing portions 3 that are respectively fixed to the keyboard chassis 1. A plurality of keys 2 each having a key body portion 5 formed thereon via the keyboard, and provided at the keyboard chassis 1, the positions of the keys 2 contacting the lower surfaces of the hinge portions 4 according to the pitches of the plurality of keys 2. By providing a plurality of different fulcrum portions 20, it is possible to easily change the key touch feeling of the plurality of keys 2 according to the pitch with a simple structure without changing the shape of the plurality of keys 2. .

  That is, in this electronic keyboard instrument, the key pressing load of the plurality of keys 2 can be changed according to the contact positions of the plurality of fulcrum portions 20 with respect to the lower surfaces of the hinge portions 4 of the plurality of keys 2. Each key touch feeling of the key 2 can be changed according to the pitch. For this reason, the key touch feeling of the plurality of keys 2 can be easily changed by changing the contact position of the plurality of fulcrum portions 20 without changing the shape of the plurality of keys 2. Can be changed according to.

  Accordingly, the plurality of keys 2 can be easily manufactured, and the plurality of support portions 20 can be formed integrally with the keyboard chassis 1, so that it is not necessary to manufacture the plurality of support portions 20 individually. For this reason, even if it has the some support part 20, since a number of parts does not increase, while being able to improve the productivity of the whole apparatus, the cost reduction of the whole apparatus can be achieved.

  In this case, the plurality of fulcrum parts 20 are located at positions corresponding to the front part side of the hinge part 4 so that the fulcrum part 20 located on the low sound area side of the plurality of keys 2 is located on the high sound area side of the plurality of keys. Since the fulcrum part 20 is installed at a position corresponding to the rear part side of the hinge part 4, the distance from the front end part of the hinge part 4 to the fulcrum part 20 is short on the low sound side and long on the high sound side. Can be set to

  That is, in this electronic keyboard instrument, the plurality of fulcrum parts 20 have a short distance from the front end part of each hinge part 4 to the fulcrum part 20 on the low frequency side of the plurality of keys 2, and on the high frequency side of the plurality of keys 2. The length in the front-rear direction in which the hinge part 4 located on the low sound side is elastically deformed is set to be longer than the length in the front-rear direction in which the hinge part 4 located on the high sound side is elastically deformed. Can also be shortened.

  For this reason, when the key body 5 on the low sound side and the key body 5 on the high sound side are depressed and pushed down by the same key stroke, the key pressing load of the key 2 located on the low sound side is high. The key pressing feeling of the key 2 located on the low frequency range side is made heavier than the key pressing feeling of the key 2 located on the high frequency range side. Can do.

  In addition, the fulcrum portions 20 can gradually change the key touch feeling according to the pitch, since the contact positions with respect to the hinge portions 4 are gradually different in the pitch order of the plurality of keys 2. That is, the plurality of fulcrum portions 20 are provided from the front side to the rear side of the hinge portion 4 so that the respective contact positions are directed from the low frequency range side to the high frequency range side. Therefore, the key touch feeling can be gradually reduced.

  In the above-described embodiment, the case where the contact positions of the fulcrum portions 20 with respect to the hinge portions 4 of the plurality of keys 2 are set so as to be gradually different from the low sound range side toward the high sound range side has been described. However, the present invention is not limited to this, and the contact positions of the plurality of fulcrum portions 20 may be set so as to be different step by step for each of the plurality of pitch ranges from the low range to the high range.

  In the above-described embodiment, the case where the plurality of fulcrum portions 20 are integrally formed with the key support portion 6 of the keyboard chassis 1 has been described. However, it is not always necessary to form the fulcrum portions 20 integrally. A plurality of fulcrum portions 20 may be integrally formed on the band plate to be attached, and the band plate may be attached to the key support portion 6 of the keyboard chassis 1 with screws or the like.

  If comprised in this way, when attaching a strip on the key support part 6 of the keyboard chassis 1, a strip will be arrange | positioned on the key support part 6 along the sequence direction of the key 2, and both ends of this strip Is shifted in the front-rear direction of the key 2 and the band plate is tilted with respect to the arrangement direction of the key 2 so that the contact positions of the plurality of fulcrum portions 20 can be accurately and easily determined according to the pitches of the plurality of keys 2. Can be adjusted.

  Further, in such a configuration, since it is not necessary to integrally form the plurality of fulcrum portions 20 on the keyboard chassis 1, the structure of the keyboard chassis 1 can be simplified as compared with the above-described embodiment. A mold for molding the keyboard chassis 1 can be easily manufactured. For this reason, the keyboard chassis 1 can be manufactured more easily and cheaply than in the case of the above-described embodiment.

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

(Appendix)
According to the first aspect of the present invention, a key body portion is formed via a hinge portion that is arranged in parallel on the keyboard chassis and fixed to the keyboard chassis and elastically deforms in the vertical direction. A plurality of keys, and a plurality of fulcrum portions provided on the keyboard chassis, the positions of which abut each of the hinge portions of the plurality of keys differ from each other according to the pitch of the plurality of keys. This is a keyboard device.

  According to a second aspect of the present invention, in the keyboard device according to the first aspect, the plurality of fulcrum portions have a distance from a front end portion of the hinge portion to the fulcrum portion on the bass region side of the plurality of keys. A keyboard device that is short and is set to be long on the high-frequency range side of the plurality of keys.

  According to a third aspect of the present invention, in the keyboard device according to the first or second aspect, the abutment positions of the plurality of fulcrum portions gradually differ in the pitch order of the plurality of keys. It is the keyboard device characterized by the above.

DESCRIPTION OF SYMBOLS 1 Keyboard chassis 2 Key 3 Connection fixing | fixed part 4 Hinge part 5 Key main-body part 6 Key support part 13 Switch pressing part 14 Switch member 20 Supporting point part L1-L3 Distance from supporting point part to the front-end part of a hinge part F1-F4 Key load S1 ~ S3 Key stroke

Claims (3)

Keyboard chassis,
A plurality of keys arranged in parallel on the keyboard chassis, each of which has a key body formed through a hinge part that elastically deforms in a vertical direction on a fixed part fixed to the keyboard chassis;
A plurality of fulcrum portions provided on the keyboard chassis, the positions of which abut each of the hinge portions of the plurality of keys differ from each other according to the pitch of the plurality of keys;
A keyboard device characterized by comprising:   2. The keyboard device according to claim 1, wherein the plurality of fulcrum portions have a short distance from a front end portion of the hinge portion to the fulcrum portion on a low-frequency region side of the plurality of keys, and a high-frequency region of the plurality of keys. Keyboard device characterized by being set longer on the side. 3. The keyboard device according to claim 1, wherein the plurality of fulcrum portions are gradually different in abutting positions with respect to the hinge portions in order of pitches of the plurality of keys. .

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