JP2011227273A - Keyboard device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a keyboard device which enables downsizing of the whole device without causing hindrance to performance even if a cross direction length of keys is shortened.SOLUTION: A black key 13 is divided into a key body part 20 mounted on a keyboard chassis 1 in a position capable of rotating in a vertical direction and a key operation part 21 mounted on the keyboard body part 20 in a way capable of sliding in a cross direction thereof. Therefore, even if the cross direction length of a white key 12 is shortened, the cross direction length of the key operation part 21 of the black key 13 can be sufficiently secured, and a cross direction arrangement state between the key operation part 21 of the black key 13 and the white key 12 can be optimized by sliding the key operation part 21 of the black key 13 to the rear during performance, as a result, a performer can perform well without feeling discomfort. The whole device can be downsized because the depth of the whole device can be shortened by sliding the key operation part 21 of the black key 13 to the front when not performed.

Description

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

  Generally, a keyboard device such as an electronic piano has a black key with a length in the front-rear direction when a plurality of keys composed of a white key and a black key are arranged on the keyboard chassis so as to be vertically rotatable. The black key with the white key when playing, by moving the front end of the black key behind the front end of the white key and shifting the front and rear positions of the black key and white key. The key pressing operation can be performed satisfactorily.

  In such a conventional keyboard device, as described in Patent Document 1, among a plurality of keys consisting of a white key and a black key, the black key is divided into a key body portion and a key operation portion. A configuration in which a key operation unit is mounted on a key body is known. In this case, the black key has a divided key operation part formed in a hollow part, and a weight is accommodated in the hollow part and attached on the key body part, thereby increasing the weight of the black key and the key touch feeling. Configured to adjust.

JP 2001-147686 A

  However, in such a conventional keyboard device, even if the black key is divided into the key body part and the key operation part, the divided key operation part is simply attached on the key body part. In order to reduce the overall size of the device, the length of the black key in the front-rear direction can be reduced by shortening the length of the white key in the front-rear direction while keeping the positional deviation between the white key and the black key in the front-rear direction constant. Becomes extremely short. Further, when the length of the white key in the front-rear direction is shortened and the length of the black key in the front-rear direction is sufficiently secured, the positional deviation between the black key and the white key in the front-rear direction becomes extremely short.

  For this reason, in such a conventional keyboard device, in any case described above, when the performer performs, the arrangement of the white key and the black key in the front-rear direction causes a sense of incongruity. There is a problem that not only the performance cannot be performed well, but also the depth of the entire apparatus cannot be shortened to reduce the size of the entire apparatus.

  The problem to be solved by the present invention is to provide a keyboard device capable of reducing the overall size of the device without causing any trouble in performance even if the length of the key in the front-rear direction is shortened.

In order to solve the above problems, the present invention includes the following components.
The invention according to claim 1 is a keyboard device in which a plurality of keys consisting of a white key and a black key are arranged on a keyboard chassis and attached in a state of being rotatable in the vertical direction, the black key being the keyboard chassis. A keyboard characterized in that it is divided into a key body portion mounted on the key body portion so as to be rotatable in the vertical direction and a key operation portion mounted on the key body portion so as to be slidable in the front-rear direction. Device.

  The invention according to claim 2 is provided with a guide member that guides the key operation part on the key body part so as to be slidable in the front-rear direction of the key body part. It is a keyboard device.

  According to a third aspect of the present invention, there is provided a keyboard device according to the first or second aspect, further comprising a position restricting portion for restricting a slide position of the key operation portion with respect to the key body portion. It is.

  The invention according to claim 4 is characterized in that the key operation part is constituted by a hollow operation part main body opened to the lower side and a slide part provided on the lower surface of the operation part main body. A keyboard device according to any one of claims 1 to 3.

  According to the present invention, even when the length of the white key in the front-rear direction is shortened, the length of the black key operation unit in the front-rear direction can be sufficiently secured, and the black key key can be used when performing. By sliding the operation unit backwards, the arrangement of the black key operation unit and the white key in the front-rear direction can be optimized, so that the player can perform well without feeling uncomfortable. In addition, since the depth of the entire apparatus can be shortened by sliding the key operation portion of the black key forward when not playing, the entire apparatus can be miniaturized.

In one Embodiment which applied this invention to the electronic keyboard musical instrument, it is the top view which showed the state which is not performed. It is an expanded sectional view in the AA arrow of the electronic keyboard musical instrument shown by FIG. FIG. 3 is an enlarged sectional view showing a white key in the electronic keyboard instrument shown in FIG. 2. It is an expanded sectional view in the BB arrow of the electronic keyboard musical instrument shown by FIG. FIG. 5 is an enlarged cross-sectional view showing a black key in the electronic keyboard instrument shown in FIG. 4. FIG. 2 is a plan view showing a state in which the key operation units of all the black keys are slid backward when performing in the electronic keyboard instrument shown in FIG. 1. FIG. 7 is an enlarged perspective view showing a main part of the electronic keyboard instrument shown in FIG. 6. FIG. 8 is an enlarged perspective view showing a main part of the electronic keyboard instrument shown in FIG. 7 with a key operation part removed from a key body part of a black key. FIG. 8 is an enlarged side view showing a key operation unit for a black key in the electronic keyboard instrument shown in FIG. 7. 9 shows a key operation unit of the black key shown in FIG. 9, (a) is an enlarged rear view of the key operation unit viewed from the rear (right side in FIG. 9), and (b) is a CC view of the key operation unit. It is an expanded sectional view in an arrow view. FIG. 10 is an enlarged perspective view of the slide part viewed from obliquely above in the key operation part of the black key shown in FIG. 9. It is the expansion perspective view which showed the principal part of the slide part shown by FIG. It is the figure which showed the state which accommodates the electronic keyboard musical instrument shown in FIG. 1 by accommodating in a cylindrical storage case. It is the expansion perspective view which decomposed | disassembled and showed the principal part in the modification of the guide member in the black key of the electronic keyboard musical instrument to which this invention is applied.

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 to 5, the electronic keyboard instrument includes a keyboard chassis 1, a plurality of keys 2 arranged on the keyboard chassis 1 and attached so as to be rotatable in the vertical direction, and a keyboard chassis. 1 is provided with a key switch unit 3 that outputs a switch signal in response to a key pressing operation of a plurality of keys 2, and an operation unit 4 having various operation switches such as a power source and a tone color.

  The keyboard chassis 1 is made of a synthetic resin and constitutes a lower case of the musical instrument case as shown in FIGS. 1 to 4 and is formed long along the arrangement direction of the plurality of keys 2. As shown in FIGS. 2 and 4, a rear leg portion 5 is formed from the bottom portion to the upper portion at the rear end portion (right end portion in FIG. 2) of the keyboard chassis 1. A comb-like key attachment plate 6 for attaching a plurality of keys 2 is attached to the rear leg portion 5 with screws 6a.

  A circuit board 7 is attached to the rear upper part of the keyboard chassis 1 (upper right part in FIG. 2) as shown in FIGS. On the circuit board 7, various electronic components 7a necessary for an electronic keyboard instrument are mounted. A key switch portion 3 is provided at a substantially middle portion of the keyboard chassis 1 in the front-rear direction (left-right direction in FIG. 2).

  As shown in FIGS. 2 and 4, the key switch unit 3 is provided on the switch board 8, which is arranged on the keyboard chassis 1 and is continuous along the arrangement direction of the plurality of keys 2. And a rubber sheet 9 continuous along the arrangement direction of the plurality of keys 2. The rubber sheet 9 is provided with a pair of dome-shaped bulges 9 a and 9 b corresponding to the respective keys 2.

  Further, the key switch unit 3 is provided with a movable contact (not shown) in each of the pair of dome-shaped bulges 9a and 9b, and a pair of dome-shaped bulges by the key 2 that has been pressed. When 9a and 9b are pressed and elastically deformed, the movable contact is configured to output a switch signal by sequentially contacting a pair of fixed contacts (not shown) provided on the switch substrate 8 with a time difference. Has been.

  Further, as shown in FIGS. 2 and 4, a front leg portion 10 is formed at the front end portion (left end portion in FIG. 2) of the keyboard chassis 1 from the top to the bottom. An opening 10 a is formed in the front leg 10. On the upper part of the front leg portion 10, a key guide portion 11 is provided to stand to prevent the key 2 from being touched sideways.

  Further, as shown in FIGS. 1 and 6, the operation unit 4 is exposed at the side end portion (left end portion in FIG. 1) in the arrangement direction of the plurality of keys 2 on the keyboard chassis 1. It has been. The operation unit 4 is provided with various switches necessary for an electronic keyboard instrument, such as a power switch and a tone color selection switch, that can be operated from the outside.

  On the other hand, the plurality of keys 2 have a plurality of white keys 12 and a plurality of black keys 13 as shown in FIGS. As shown in FIGS. 2 and 3, the white key 12 has a rotation mounting portion 14 that hangs downward from the upper portion to the rear end portion (the right end portion in FIG. 2). The rotation attachment portion 14 includes a resin hinge portion 15 provided at an intermediate portion in the vertical direction and an attachment portion 16 provided at a lower portion of the resin hinge portion 15.

  The resin hinge portion 15 is a thin plate-like thin portion, and is configured to bend in the front-rear direction of the white key 12 in response to a pressing operation of the white key 12. The attachment portion 16 is configured to be attached to the key attachment plate 6 of the rear leg portion 5 of the keyboard chassis 1. Thus, the white key 12 is configured to rotate in the vertical direction around the resin hinge 15 when the resin hinge 15 is bent in the front-rear direction of the white key 12 in response to a pressing operation.

  Further, as shown in FIGS. 2 and 3, the white key 12 is provided with a pair of switch pressing portions 17 a and 17 b corresponding to the key switch portion 3 provided in the keyboard chassis 1. The pair of switch pressing portions 17a and 17b is formed so that the vertical length of the switch pressing portion 17a located on the front side of the white key 12 is slightly longer than the switch pressing portion 17b located on the rear side of the white key 12. Has been. Accordingly, the pair of switch pressing portions 17a and 17b are configured to sequentially press the bulging portions 9a and 9b of the key switch portion 3 with a time difference when the white key 12 is pressed.

  Further, on the front side (left side in FIG. 2) of the white key 12, as shown in FIGS. 2 and 3, a retaining portion 18 for preventing the white key 12 from coming out above the keyboard chassis 1 is provided. A lower leg is provided along the front leg 10 of the chassis 1. As shown in FIG. 2, a hook portion 18 a that is inserted in the opening 10 a of the front leg portion 10 of the keyboard chassis 1 so as to be movable in the vertical direction is provided at the lower end portion of the retaining portion 18 so as to protrude rearward. Yes.

  Thereby, the retaining portion 18 is a resin hinge portion of the rotary mounting portion 14 located at the rear end portion of the white key 12 as shown in FIG. 2 in the initial state where the white key 12 is not depressed. 15, the hook portion 18a moves upward in the opening portion 10a of the front leg portion 10 by rotating clockwise around the resin hinge portion 15 by the elastic restoring force of the 15, and the moved hook portion 18a The white key 12 is constrained to the upper limit position by contacting an upper limit stopper portion 19a provided at the upper front portion of the keyboard chassis 1.

  Further, when the white key 12 is depressed, the retaining portion 18 is bent against the elastic force of the resin hinge portion 15 of the rotary mounting portion 14 located at the rear end portion of the white key 12. As a result, the white key 12 rotates counterclockwise around the resin hinge portion 15, and the hook portion 18a moves downward in the opening 10a of the front leg portion 10. The moved hook portion 18a The white key 12 is constrained to the lower limit position by abutting against a lower limit stopper portion 19b provided at the lower front side of the keyboard chassis 1.

  On the other hand, as shown in FIGS. 4 and 5, the black key 13 includes a key main body 20 attached to the keyboard chassis 1 so as to be rotatable in the vertical direction, and a front-rear direction ( 4 is provided with a key operation unit 21 slidably mounted in the left-right direction in FIG. As shown in FIG. 8, the key body portion 20 of the black key 13 is disposed between the white keys 12, and the length in the front-rear direction is shorter than that of the white key 12.

  That is, as shown in FIG. 8, the key body portion 20 has a rear end portion (right end portion in FIG. 8) at the same position as a rear end portion (right end portion in FIG. 8) of the white key 12 and a front end portion (FIG. 8). The left end portion in FIG. 8 is configured to be located behind (the right end in FIG. 8) behind the front end portion (left end portion in FIG. 8) of the white key 12. Further, the upper surface of the key body 20 is formed at the same height as the upper surface of the white key 12.

  Similarly to the white key 12, the key body 20 also has a rotation mounting portion 22 that hangs downward from the upper portion to the rear end portion (the right end portion in FIG. 4). The rotation attachment portion 22 includes a resin hinge portion 23 provided at an intermediate portion in the vertical direction and an attachment portion 24 provided at a lower portion of the resin hinge portion 23.

  Similar to the white key 12, the resin hinge portion 23 is a thin plate-shaped thin portion, and is configured to bend in the front-rear direction of the black key 13 in response to a pressing operation of the black key 13. Further, the mounting portion 24 is configured to be mounted on the key mounting plate 6 of the rear leg portion 5 of the keyboard chassis 1, similarly to the white key 12. As a result, the key body 20 of the black key 13 rotates in the vertical direction around the resin hinge portion 23 as the resin hinge portion 23 bends in the front-rear direction of the black key 13 in response to the pressing operation. It is configured.

  Further, as shown in FIGS. 4 and 5, a pair of switch pressing portions 25 a and 25 b are provided on the key body portion 20 of the black key 13 corresponding to the key switch portion 3 provided on the keyboard chassis 1. ing. The pair of switch pressing portions 25a and 25b has a length in the vertical direction of the switch pressing portion 25a located on the front side of the key body portion 20 slightly shorter than that of the switch pressing portion 25b located on the rear side of the key body portion 20. It is formed long. Thus, the pair of switch pressing portions 25a and 25b are configured to sequentially press the bulging portions 9a and 9b of the key switch portion 3 with a time difference when the black key 13 is pressed.

  Further, the front side (left side in FIG. 4) of the black key 13 is secured to prevent the black key 13 from slipping out above the keyboard chassis 1 as shown in FIGS. A portion 26 is provided so as to protrude downward along the front leg portion 8 of the keyboard chassis 1. The retaining portion 26 is provided at the same installation position as the retaining portion 18 of the white key 12 in the longitudinal position of the key body portion 20. Further, as shown in FIG. 4, a hook portion 26a that is movably inserted in the vertical direction into the opening 10a of the front leg portion 10 of the keyboard chassis 1 is provided at the lower end portion of the retaining portion 26 so as to protrude rearward. It has been.

  As a result, when the black key 13 is in an initial state in which the key pressing operation is not performed, the retaining portion 26 is, as shown in FIG. 4, the resin hinge of the rotary mounting portion 22 located at the rear end portion of the key body portion 20. The hook 26a moves upward in the opening 10a of the front leg portion 10 by rotating clockwise around the resin hinge portion 23 by the elastic restoring force of the portion 23, and the hook portion 26a thus moved is moved. Is in contact with an upper limit stopper 19a provided on the upper front side of the keyboard chassis 1 so as to restrict the black key 13 to the upper limit position.

  Further, when the black key 13 is depressed, the retaining portion 26 is bent against the elastic force of the resin hinge portion 23 of the rotary mounting portion 22 located at the rear end portion of the black key 13. As a result, the black key 13 rotates counterclockwise around the resin hinge portion 23, the hook portion 26a moves downward in the opening 10a of the front leg portion 10, and the moved hook portion 26a The black key 13 is constrained to the lower limit position by abutting against a lower limit stopper portion 19b provided at the front lower portion of the keyboard chassis 1.

  By the way, as shown in FIGS. 1 and 6, the key operation unit 21 of the black key 13 has a length in the front-rear direction substantially the same as that of the white key 12, and as shown in FIG. The unit 20 is configured to be slidable in the front-rear direction. In this case, as shown in FIGS. 9 and 10, the key operation unit 21 includes an operation unit main body 30 that is operated to press a key, and a slide unit 31 provided on the lower surface of the operation unit main body 30. . The operation unit main body 30 is formed in a hollow, substantially rectangular bar shape whose lower side is open.

  That is, as shown in FIG. 9, the operation unit main body 30 is formed such that its front end (left end in FIG. 9) is high and gradually decreases toward the rear side (right side in FIG. 9). As shown in FIG. 11, the slide portion 31 is formed in a band plate shape having substantially the same length as the operation portion main body 30, and as shown in FIG. It is comprised so that the lower surface of the operation part main body 30 may be plugged up.

  In this case, as shown in FIGS. 4 to 12, the black key 13 includes a guide member 33 that guides the key operation unit 21 on the key body 20 so as to be slidable in the front-rear direction of the key body 20. As shown in FIGS. 4 and 8, the guide member 33 includes a guide pin 34 provided on the key body 20, and an operation body 30 of the key operation section 21 as shown in FIGS. 10 and 11. Provided on the slide portion 31 on the lower surface, the guide pin 34 includes a guide groove 35 that moves relatively along the front-rear direction of the key body portion 20.

  As shown in FIGS. 5 and 8, the guide pin 34 includes a shaft portion 34a provided upright on the key body portion 20, and a large-diameter head portion 34b provided on the upper portion of the shaft portion 34a. Have. As shown in FIG. 8, the guide pins 34 are provided at the front end (left end in FIG. 8) and the rear end (right end in FIG. 8) on the upper surface of the key body 20 respectively. As shown in FIG. 11, the guide groove 35 is continuous from the front side (left side in FIG. 11) to the rear end (right end in FIG. 11) of the slide portion 31 in the key operation unit 21. The part is opened toward the rear (right side in FIG. 11).

  In this case, at the rear end portion (right end portion in FIG. 9) of the operation portion main body 30 of the key operation portion 21, the head portion 34b of the guide pin 34 is provided as shown in FIGS. An opening 30a is provided to be inserted from the rear of the operation unit main body 30 toward the inside thereof. Thus, the shaft 34 a of the guide pin 34 is inserted into the guide groove 35 from the rear end side of the key operation unit 21, and the head 34 b is operated from the rear end side of the key operation unit 21. It is configured to be inserted inside.

  For this reason, as shown in FIGS. 10A and 10B, the guide member 33 has the shaft portion 34 a of the guide pin 34 inserted into the guide groove 35 of the slide portion 31 from the rear side of the key operation portion 21. While being inserted, the head portion 34b of the guide pin 34 is inserted into the operation portion main body 30 and slides on the upper surface of the slide portion 31, so that the key operation portion 21 rattles in the vertical direction on the key main body portion 20. The key operation unit 21 is configured to guide the key body unit 20 in the front-rear direction.

  Further, as shown in FIGS. 4 to 12, the black key 13 includes a position restricting portion 37 for restricting the slide position of the key operating portion 21 with respect to the key main body portion 20. As shown in FIGS. 4 and 9, the position restricting portion 37 includes first and second engaging protrusions 38a and 38b provided on the lower surface of the slide portion 31, and a key as shown in FIG. First and second engaging holes 39a and 39b provided on the upper surface of the main body 20 and engaged with the first and second engaging protrusions 38a and 38b in a detachable manner. .

  Of the first and second engaging protrusions 38a and 38b, the first engaging protrusion 38a is, as shown in FIGS. 9 and 12, the front end of the lower surface of the slide portion 31 (the left end in FIG. 9). One) in the middle part. In this case, a slit hole 40 having a substantially U-shape is provided in a portion of the slide portion 31 that is located around the first engaging protrusion 38a, as shown in FIGS. The slit hole 40 is for making the first engagement protrusion 38a easily elastically deformed in the vertical direction.

  As shown in FIGS. 9 and 10A, the second engagement protrusions 38b are provided on both sides of the guide groove 35 at the rear end portion (the right end portion in FIG. 9) of the lower surface of the slide portion 31, respectively. Yes. For this reason, the second engaging protrusion 38b is configured to be easily elastically deformed in the vertical direction by the guide groove 35. In this case, since only one first engagement protrusion 38a is provided on the slide portion 31, it is desirable that the first engagement protrusion 38a be formed slightly larger than the second engagement protrusion 38b.

  Further, of the first and second locking holes 39a and 39b, the first locking hole 39a is, as shown in FIG. 8, the front end portion (the left end portion in FIG. 8) on the upper surface of the key body portion 20. One is provided. The second locking holes 39b are provided on both sides of the rear end portion (the right end portion in FIG. 8) on the upper surface of the key body portion 20, respectively. Also in this case, it is desirable that the first locking hole 39a is formed to be slightly larger than the second locking hole 39b.

  As a result, as shown in FIG. 7, the position restricting unit 37 slides the key operation unit 21 rearward with respect to the key body unit 20, and the front end portion (left end portion in FIG. 7) of the key operation unit 21. Corresponds to the front end portion of the operation portion main body 30, the first engagement protrusion 38 a of the slide portion 31 engages with the first locking hole 39 a of the key main portion 20, and the key operation portion 21 is moved. The key body 20 is configured to be position restricted.

  Further, as shown in FIG. 4, the position restricting portion 37 slides the key operation portion 21 forward with respect to the key body portion 20, so that the front end portion (the left end portion in FIG. 4) of the key operation portion 21. Is projected to the front side from the front end portion (left end portion in FIG. 4) of the operation portion main body 30 and corresponds to the front end portion (left end portion in FIG. 2) of the white key 12, the second engaging projection portion of the slide portion 31. 38 b is configured to engage with the second locking hole 39 b of the key body portion 20 to restrict the position of the key operation portion 21 with respect to the key body portion 20.

Next, the operation of such an electronic keyboard instrument will be described.
First, when playing with this electronic keyboard instrument, as shown in FIGS. 6 and 7, the key operation unit 21 of the black key 13 is slid rearward (right side in FIG. 7) with respect to the key body unit 20. Let At this time, the shaft portion 34 a of the guide pin 34 in the guide member 33 of the black key 13 moves along the guide groove 35 of the slide portion 31 in the key operation portion 21, and the head portion 34 b of the guide pin 34 moves in the slide portion 31. Slide on the top surface. As a result, the key operation unit 21 slides smoothly toward the rear of the key body 20 without rattling in the vertical direction on the key body 20.

  As described above, when the key operation unit 21 slides backward on the key body 20, the second engagement protrusion 38 b of the slide 31 in the position restricting portion 37 causes the second engagement protrusion 38 b of the key body 20. The key is elastically detached from the locking hole 39b and moves to the rear of the key body 20. Therefore, the first and second engaging protrusions 38 a and 38 b of the position restricting portion 37 do not exist on the key main body portion 20 and are separated from the key main body portion 20.

  Then, the key operation unit 21 slides rearward on the key body 20, and the front end (left end in FIG. 7) of the key operation unit 21 is the front end (left end in FIG. 7) of the operation unit body 30. 4, the first engaging protrusion 38 a of the position restricting portion 37 rides on the front end portion of the key main body portion 20 as shown by a two-dot chain line in FIG. Is engaged with the locking hole 39a.

  At this time, since the first engagement protrusion 38 a is elastically pushed up by the slit hole 40, the first engagement protrusion 38 a easily rides on the front end of the key body 20. As a result, as shown in FIG. 7, the first engaging protrusion 38 a of the slide portion 31 in the position restricting portion 37 engages with the first locking hole 39 a of the key body portion 20, and the key operating portion 21. Is restricted with respect to the key body 20.

  In this state, as shown in the two-dot chain line in FIG. 4 and FIG. 7, the rear end portion (right end portion in FIG. 7) of the key operation portion 21 is the rear end portion (right end portion in FIG. 7) and The white key 12 protrudes rearward from the rear end portion (right end portion in FIG. 7), but the front end portion (left end portion in FIG. 7) of the key operation portion 21 is the front end portion (left end in FIG. 7) of the operation portion main body 30. 2) is located behind the front end (left end in FIG. 7) of the white key 12, so that the arrangement of the keys 2 is the same as that of a general keyboard device.

  For this reason, like a general keyboard device, it is possible to perform well by a key pressing operation. That is, when the white key 12 is pressed in FIG. 2, the resin hinge portion 15 of the rotation mounting portion 14 provided at the rear end portion of the white key 12 bends according to the key pressing operation, so that the white key 12 is It rotates counterclockwise around the resin hinge 15. Accordingly, the pair of switch pressing portions 17a and 17b of the white key 12 sequentially press the pair of bulging portions 9a and 9b of the key switch portion 3 with a time difference, so that the key switch portion 3 outputs a switch signal. Release a musical sound.

  In addition, when the key operation unit 21 of the black key 13 is pressed in the state indicated by the two-dot chain line in FIG. 4, it is provided at the rear end portion (right end portion in FIG. 4) of the key body portion 20 of the black key 13. When the resin hinge portion 23 of the rotation mounting portion 22 bends in response to the key pressing operation, the black key 13 rotates counterclockwise around the resin hinge portion 23 as with the white key 12. Accordingly, the pair of switch pressing portions 25a and 25b provided in the key body portion 20 of the black key 13 sequentially presses the pair of bulging portions 9a and 9b of the key switch portion 3 with a time difference. 12, the key switch unit 3 outputs a switch signal to emit a musical sound.

Next, the case where this electronic keyboard instrument is not used will be described.
At this time, in the state shown in FIG. 7, the key operation part 21 of the black key 13 is slid to the front side (left side in FIG. 7) of the key body part 20. Also at this time, the shaft portion 34a of the guide pin 34 in the guide member 33 of the black key 13 moves along the guide groove 35 of the slide portion 31 in the key operation portion 21, and the head portion 34b of the guide pin 34 moves to the slide portion. The upper surface of 31 is slid. As a result, the key operation unit 21 slides smoothly toward the front of the key body 20 without rattling in the vertical direction on the key body 20.

  As described above, when the key operation unit 21 slides forward on the key body 20, the first engagement protrusion 38 a of the slide 31 in the position restricting portion 37 causes the first engagement protrusion 38 a of the key body 20. The key is elastically detached from the locking hole 39a and moves to the front of the key body 20. At this time, since the first engagement protrusion 38a is elastically pushed up by the slit hole 40, the first engagement protrusion 38a is easily detached from the front end of the key body 20 and moved forward.

  Then, the key operation unit 21 slides on the key body 20 toward the front side (left side in FIG. 7), and the front end portion (left end portion in FIG. 7) of the key operation unit 21 is the front end portion (see FIG. 7). 7 and the left end portion), the second engaging projection 38b of the slide portion 31 in the position restricting portion 37 is aligned with the second end portion of the key body portion 20, as shown by the solid lines in FIGS. The key operation part 21 is position-regulated with respect to the key main body part 20 by engaging with the locking hole 39b.

  In this state, as shown in FIGS. 1, 2 and 4, the rear end portion (right end portion in FIG. 4) of the key operating portion 21 of the black key 13 is the rear end portion (right end portion in FIG. 4). ) And the rear end portion (right end portion in FIG. 4) of the white key 12, and the front end portion (left end portion in FIG. 2) of the key operating portion 21 of the black key 13 is the front end portion (see FIG. 2). 2 is aligned corresponding to the left end). Thereby, the length of the whole musical instrument in the depth direction is shortened, and the whole musical instrument becomes compact.

  That is, when the length of the entire musical instrument in the depth direction is shortened, the entire musical instrument is elongated in a band shape along the arrangement direction of the keys 2. For this reason, as shown in FIG. 13, since an elongated electronic keyboard instrument can be stored compactly in a cylindrical storage case 41, the belt 42 provided in the storage case 41 is hung on the shoulder and carried well. Can do. For this reason, this electronic keyboard instrument has good portability and transportability.

  As described above, according to this electronic keyboard instrument, the black key 13 is mounted on the keyboard chassis 1 so as to be rotatable in the vertical direction, and on the key main body 20 in the front-rear direction. Since it is divided into the slidably attached key operation unit 21, even if the length of the plurality of keys 2 composed of the white key 12 and the black key 13 in the front-rear direction is shortened, the performance is hindered. Therefore, the entire apparatus can be reduced in size.

  That is, in this electronic keyboard instrument, when playing, the key operation part 21 of the black key 13 is slid toward the rear side on the key body part 20, so that the front end part of the key operation part 21 of the black key 13 is moved. The white key 12 can be positioned behind the front end of the white key 12 to be in the same state as the key arrangement state of a general keyboard device. Further, when not performing, the key operation unit 21 of the black key 13 is slid toward the front side on the key body unit 20 so that the key operation unit 21 and the white key 12 of the black key 13 are almost in the front-rear direction. It can be arranged in an aligned state.

  For this reason, with this electronic keyboard instrument, even when the length of the white key 12 in the front-rear direction is shortened, the length of the black key 13 in the front-rear direction of the key operation unit 21 can be sufficiently secured and played. Sometimes, the key operation unit 21 of the black key 13 is slid rearward to optimize the arrangement state of the key operation unit 21 of the black key 13 and the white key 12 in the front-rear direction. It does not occur and can be played well.

  Further, in this electronic keyboard instrument, when the player does not play, the key operation unit 21 of the black key 13 can be slid forward to reduce the depth of the entire device, and thus the overall size of the device can be reduced. . That is, when the depth of the entire musical instrument is shortened, the entire musical instrument can be elongated in a strip shape. Thereby, the portability and transportability of the electronic keyboard instrument are good, and the electronic keyboard instrument can be stored compactly in the cylindrical storage case 41, so that it can be carried well, the packing operation is easy, and the packing cost is reduced. be able to.

  Further, the electronic keyboard instrument includes a guide member 33 that guides the key operation unit 21 to be slidable in the front-rear direction of the key body unit 20 on the key body unit 20. Can be smoothly slid in the front-rear direction on the key body 20. That is, the guide member 33 is provided on the guide pin 34 provided on the key body 20 and the lower surface of the key operation unit 21, and the guide pin 34 is relatively moved along the front-rear direction of the key body 20. Since the moving guide groove 35 is provided, the key operating portion 21 of the black key 13 can be slid while being guided smoothly and satisfactorily.

  Further, this electronic keyboard instrument is provided with a position restricting portion 37 for restricting the slide position of the key operating portion 21 with respect to the key main portion 20, so that the key operating portion 21 of the black key 13 is attached to the key main portion 20. On the other hand, the position can be reliably and satisfactorily regulated at a predetermined position by sliding. In this case, the position restricting portion 37 is provided on each of the first and second engaging projections 38 a and 38 b provided on the lower surface of the slide portion 31 and on the upper surface of the key body portion 20. Since each engaging protrusion 38a, 38b is constituted by the first and second engaging holes 39a, 39b that are detachably engaged, the structure is simple and the key operating portion 21 of the black key 13 is provided. Can be reliably and satisfactorily regulated with respect to the key body 20.

  That is, according to the position restricting portion 37, when the key operation portion 21 is slid rearward with respect to the key body portion 20, the front end portion of the key operation portion 21 corresponds to the front end portion of the operation portion body 30. In addition, the first engaging protrusion 38 a of the slide portion 31 engages with the first locking hole 39 a of the key body 20, so that the key operating portion 21 can be accurately and reliably secured to the key body 20. The position can be restricted.

  In this case, since the first engagement protrusion 38a of the slide portion 31 is provided with the slit hole 40 around the first engagement protrusion 38a, the first engagement protrusion 38a rides on the key body 20 and is engaged with the first engagement protrusion 38a. When engaging with the stop hole 39a or when the first engagement protrusion 38a is detached from the first locking hole 39a, the first engagement protrusion 38a is easily elastically deformed by the slit hole 40. Accordingly, the key operation unit 21 can be smoothly slid with respect to the key body unit 20.

  Further, according to the position restricting portion 37, the key operation portion 21 is slid forward with respect to the key body portion 20, and the front end portion of the key operation portion 21 projects forward from the front end portion of the operation portion body 30. When the second engagement protrusion 38b of the slide portion 31 is engaged with the second locking hole 39b of the key body portion 20 when the front end portion of the white key 12 is supported, the key operation portion 21 is moved. The position of the key body 20 can be accurately and reliably regulated.

  Furthermore, according to the electronic keyboard instrument, the key operation unit 21 of the black key 13 includes a hollow operation unit main body 30 that is opened downward, and a slide unit 31 that is provided on the lower surface of the operation unit main body 30. Since the operation portion main body 30 can be easily molded, the operation portion main body 30 can be formed into a free shape, thereby providing a highly designable one. Since the color of the resin at the time of molding the operation section main body 30 can be freely selected, there are a wide variety of colors, and this also provides a product with high designability.

  In this case, the slide portion 31 is formed in a plate shape that covers the lower surface of the hollow operation portion main body 30 that is open to the lower side, and is configured to slide on the key main body portion 20 together with the operation portion main body 30. The guide groove 35 of the guide member 33 is provided in the portion 31, and the guide pin 34 of the key body 20 is movably inserted into the guide groove 35, so that the key operation portion 21 of the black key 13 can be guided reliably and satisfactorily. can do.

  Further, since the guide pin 34 has a shaft portion 34 a and a head portion 34 b, the shaft portion 34 a of the guide pin 34 is inserted into the guide groove 35 of the slide portion 31 from the rear side of the key operation portion 21. When the head 34b of the guide pin 34 is inserted into the operation unit body 30 and slides on the upper surface of the slide unit 31, the key operation unit 21 does not rattle on the key body unit 20 in the vertical direction. The key operation part 21 can be smoothly guided in the front-rear direction of the key body part 20.

  In the embodiment described above, the guide groove 35 of the guide member 33 is continuously provided on the plate-like slide portion 31 in the key operation portion 21 of the black key 13 from the front portion side to the rear end portion. In addition, the case where the guide groove 35 is configured to open rearward from the rear end portion of the slide portion 31 has been described. However, the present invention is not limited to this. For example, as in the modification shown in FIG. A groove 45 may be formed.

  That is, the guide groove 45 shown in FIG. 14 is provided in the slide portion 31 from the front end portion to the rear end portion. Each guide pin 34 provided on the front end portion side and the rear end portion side of the key body portion 20 in a predetermined position of the guide groove 45, that is, in a state where the key body portion 20 corresponds to the intermediate portion of the key operation portion 21. The insertion holes 46 through which the heads 34b of the guide pins 34 are inserted from below are provided at locations corresponding to.

  If comprised in this way, the head 34b of the guide pin 34 is made to respond | correspond to the insertion hole 46 of the guide groove 45, and the key operation part 21 is arrange | positioned from the upper direction on the key main-body part 20 in this state, A guide groove The head 34 b of the guide pin 34 can be inserted into the key main body 20 through the 45 insertion holes 46. For this reason, since it is not necessary to open the guide groove 45 from the rear end part of the slide part 31 toward the rear, it is possible to provide a preferable one in terms of appearance and design.

  Also in this case, the shaft portion 34 a of the guide pin 34 is inserted into the guide groove 45 of the slide portion 31 from the rear side of the key operation portion 21, and the head portion 34 b of the guide pin 34 is inserted into the operation portion main body 30. Since the upper surface of the slide portion 31 is slid, the key operation portion 21 does not rattle up and down on the key body portion 20 as in the above-described embodiment, and the key operation portion 21 is moved back and forth of the key body portion 20. Can slide smoothly in the direction.

DESCRIPTION OF SYMBOLS 1 Keyboard chassis 2 Key 3 Key switch part 12 White key 13 Black key 14, 22 Rotation attachment part 15, 23 Resin hinge part 17a, 17b, 25a, 25b Switch press part 20 Key main part 21 Key operation part 30 Operation part main body 31 Slide portion 33 Guide member 34 Guide pin 34a Shaft portion 34b Head portion 35, 45 Guide groove 37 Position restricting portion 38a, 38b First and second engaging protrusions 39a, 39b First and second locking holes 40 Slit hole 46 Insertion hole

Claims (4)

In the keyboard device in which a plurality of keys consisting of white keys and black keys are arranged on the keyboard chassis and attached in a state where each key can be rotated in the vertical direction
The black key is divided into a key body portion that is mounted on the keyboard chassis so as to be rotatable in a vertical direction, and a key operation portion that is slidably mounted on the key body portion in the front-rear direction. A keyboard device characterized by that.   The keyboard device according to claim 1, further comprising a guide member that guides the key operation unit on the key body so as to be slidable in the front-rear direction of the key body.   The keyboard device according to claim 1, further comprising a position restricting portion for restricting a slide position of the key operation portion with respect to the key body portion. The said key operation part is comprised by the hollow operation part main body open | released below, and the slide part provided in the lower surface of this operation part main body, The Claims 1-3 characterized by the above-mentioned. A keyboard device according to any one of the above.

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