JP5359325B2 - Keyboard device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a keyboard device with suppressed height. <P>SOLUTION: A fixed holding section 28 and a movable holding section 29, which hold a substrate 26, are unitedly provided in a frame 12. The movable holding section 29 energizes the substrate 26 to a side of the fixed holding section 28. The substrate 26 abuts on the fixed holding section 28. The substrate 26 is held between the fixed holding section 28 and the movable holding section 29. The movable holding section 29 includes a deformation section 29b which is extended in a lateral direction. The deformation section 29b includes a fixed edge which is extended vertically, and the deformation section 29b is deformed in front-and-rear direction. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

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

  Conventionally, for example, as disclosed in Patent Document 1 below, a board (hereinafter simply referred to as a board) on which a switch for detecting a key pressing / releasing key state using a spring force of a leaf spring is arranged. ) Is known. In this keyboard device, the front end of the board is brought into contact with the hook, and the board is pressed against the hook by the spring force of the leaf spring and held. The leaf spring is extended downward. The leaf spring has a fixed end extending in the lateral direction, and the leaf spring is deformed rearward when the substrate is attached. The hook and the leaf spring are formed integrally with the frame.

Japanese Utility Model Publication No. 01-51997

  In the above conventional keyboard device, the height of the keyboard device has been increased because the leaf springs are greatly extended downward. In particular, in a keyboard device provided with a rocking member (for example, a hammer) that rocks with the rocking of the key to reproduce the key touch of an acoustic piano, the interference between the rocking member and the leaf spring is prevented. Therefore, it needed a big height. As a result, there is a problem that the entire musical instrument is enlarged.

  The present invention has been made to address the above-described problems, and an object of the present invention is to provide a keyboard device with a suppressed height.

In order to achieve the above object, the present invention is characterized by a plurality of keys that are pressed and released by a player, a frame that supports the plurality of keys so as to be swingable in the vertical direction, A board on which a plurality of switches for detecting a key state are arranged, a first holding part that is provided integrally with the frame and holds the front end of the board, and a board that is provided integrally with the frame and that In the keyboard device including the second holding unit that holds the end, at least one of the first and second holding units is a deforming unit that extends in the direction in which the keys are arranged. has a fixed end which extends in a vertical direction, have a deformable portion that deforms in the longitudinal direction, the deformation portion has a protrusion that protrudes toward the substrate at between the left and right side walls of the key, at least press This is because the upper end of the protrusion is positioned above the lower end of the side wall of the key when the key is locked .

  Further, the present invention is characterized in that a plurality of keys that are pressed and released by the performer, a frame that supports the plurality of keys so as to be swingable in the vertical direction, and a state in which the keys are pressed and released are detected. And a first holding part that is provided integrally with the frame and holds the front end of the board, and a first holding part that is provided integrally with the frame and holds the rear end of the board. In the keyboard device having two holding portions, at least one of the first and second holding portions is a deforming portion extending in the key arrangement direction and extending in the vertical direction. A deformed portion having a fixed end, deformed in the front-rear direction, provided with a step in the frame, and a through hole extending along the rising surface of the step extending in the frame. The fixed end is configured. In this case, the deforming part may have a protrusion protruding toward the substrate between the left and right side walls of the key, and at least when the key is depressed, the upper end of the protrusion may be positioned above the lower end of the side wall of the key.

In the keyboard device configured as described above, the deforming portion is extended in the horizontal direction (key arrangement direction), and the deforming portion is deformed in the front-rear direction with its end portion as a fixed end. Since the urging force with which the at least one holding portion urges the substrate can be adjusted by the length in the lateral direction regardless of the height of the deforming portion, the height of the at least one holding portion can be suppressed. Therefore, the height of the keyboard device can be suppressed.

In addition , since the protrusion of the at least one holding portion enters the inside of the key at least when the key is depressed, the vertical distance between the key and the at least one holding portion when the key is released can be further reduced. Therefore, the height of the keyboard device can be further suppressed.

  Another feature of the present invention is that it further includes a swinging member that is supported by the frame and swings according to a key pressing / releasing key operation.

  In the keyboard device configured as described above, even if the keyboard device has a rocking member (for example, a hammer) for reproducing the key touch of an acoustic piano, the height of the at least one holding portion is small. A large height for avoiding interference between the swing member and the at least one holding portion is not required. Therefore, even a keyboard device having a swing member can realize a keyboard device with a reduced height.

It is a vertical side view of the keyboard apparatus which concerns on one Embodiment of this invention. It is a top view of the flame | frame of the keyboard apparatus of FIG. It is an enlarged view of the fixed holding | maintenance part and movable holding | maintenance part of the flame | frame of FIG. It is the figure which expanded the fixed holding | maintenance part of the flame | frame of FIG. It is AA sectional drawing of FIG. 3A. It is a figure which shows the attachment procedure of a board | substrate. It is a vertical side view of the keyboard apparatus which concerns on the modification of this invention.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a view of the keyboard device according to the present embodiment as viewed from the treble part side (right side as viewed from the performer) through a longitudinal section. The key 11 is integrally formed in a long shape with a synthetic resin. The key 11 has a thin upper wall that extends in the front-rear direction and thin side walls that extend downward from the left and right ends of the upper wall, and is formed in a hollow shape that opens downward. The key 11 is supported by the key support portion 13 of the frame 12 provided below so that the front end portion can swing in the vertical direction around the rotation center 14 at the rear end portion.

  The frame 12 is extended in the lateral direction (key arrangement direction) by integral molding of resin. As shown in FIGS. 1 and 2, the frame 12 includes a front plate 12a and a rear plate 12b that extend in the lateral direction. The rear plate 12b is located higher than the front plate 12a, and the rear end of the front plate 12a and the front end of the rear plate 12b are connected by a vertical plate 12c extending in the lateral direction. That is, a step is formed on the upper portion of the frame 12 by the front plate 12a and the rear plate 12b. A key guide 15 provided at the front part of the frame 12 enters from the lower part into the intermediate part of the key 11, and the front end part of the key 11 is guided by the key guide 15 when the key is depressed and swings in the vertical direction. To do. A drive unit 16 extends downward from the front of the key 11. The drive unit 16 has a thin front wall that extends vertically and a thin side wall that extends rearward from the left and right ends of the front wall, and is formed in a hollow shape that opens rearward. The lower end of the drive unit 16 is closed by the lower end wall.

  Below the key 11, there is a swing lever 17 as a swing member that swings when the key 11 is pressed and released in order to apply an inertial force to the key 11 to reproduce the key touch feeling of the acoustic piano. Is provided. The swing lever 17 includes a lever base 18 made of synthetic resin and a metal mass body 19. The lever base portion 18 is a plate-like member, and is supported by a lever support portion 20 provided at the lower portion of the frame 12 by a hook portion 18a provided at the lower portion thereof so as to be rotatable around the axis of the pin 20a. Yes. The lever base 18 includes a pair of upper and lower legs 18b and 18c at the front end, and the upper leg 18b is shorter than the lower leg 18c. The lower end wall of the drive unit 16 of the key 11 enters between the leg portions 18b and 18c. An impact absorbing material such as felt is fixed to the lower surface of the lower end wall of the drive unit 16 to mitigate the impact caused by the collision between the lower end of the drive unit 16 and the upper surface of the leg portion 18c. When the key 11 is released, the front end of the swing lever 17 is displaced upward by the weight of the swing lever 17. At this time, the drive portion 16 is biased upward by the leg portion 18c, and the front end portion of the key 11 is displaced upward. On the other hand, when the key 11 is depressed, the lower end surface of the drive unit 16 presses the upper surface of the leg portion 18c, and the front end portion of the swing lever 17 is displaced downward.

  The mass body 19 is formed in a plate shape and is assembled to the front end of the lever base 18. The mass body 19 is made lighter for each key 11 or key range from the low sound side to the high sound side so that the key touch feeling becomes lighter as the sound becomes higher like an acoustic piano.

  Further, a long upper limit stopper 21 made of an impact absorbing material such as felt is fixed to the lower surface of the front end portion of the frame 12 so as to extend in the lateral direction. The upper limit stopper 21 restricts the upward displacement of the front end portion of the key 11 when the key is released by restricting the upward displacement of the front end portion of the swing lever 17. Further, a long lower limit stopper 22 made of an impact absorbing material such as felt is fixed to the lower surface of the front plate 12a of the frame 12 so as to extend in the lateral direction. The lower limit stopper 22 restricts the downward displacement of the front end portion of the key 11 when the key is depressed by restricting the upward displacement of the rear portion of the swing lever 17.

  A switch driving unit 25 is provided on the lower surface of the intermediate portion of the key 11. The switch driving unit 25 is in contact with the upper surface of the switch 27 disposed on the substrate 26. The switch 27 is provided for each key 11 and is pressed along with the swing of each key 11 to detect a pressed / released key state. The substrate 26 is held by a fixed holding unit 28 and a movable holding unit 29 provided on the frame 12. The fixed holding portion 28 and the movable holding portion 29 are integrally formed with the frame 12 with resin. The fixed holding portion 28 and the movable holding portion 29 are provided at a plurality of locations at intervals in the lateral direction. However, it is not always necessary to arrange them at equal intervals, and the intervals may be different.

  As shown in FIGS. 3A and 3B, the fixed holding portion 28 includes a base portion 28a on which the front end portion of the substrate 26 is placed, and a vertical wall 28b that abuts on the front end of the substrate 26 and defines the front position of the substrate 26. , And a protrusion 28c that defines the position of the substrate 26 in the upward direction. The base portion 28a extends in the front-rear direction at the front portion on the upper surface side of the front plate 12a, and the upper portion is a flat portion 28a1. The vertical wall 28b is provided at an intermediate position between the front ends of the two flat portions 28a1, and is a thin wall body extending in the front-rear direction and extending upward from the upper surface of the front plate 12a. The protruding portion 28c is a portion protruding rearward from the upper end of the vertical wall 28b, and the lower end surface is a flat portion 28c1 parallel to the flat portion 28a1. In addition, the lower end of the rear side of the protrusion 28c is greatly chamfered so that the substrate 26 can easily enter the fixed holding portion 28 when the substrate 26 is attached.

  As shown in FIG. 2, a vertical wall 28d that defines the position of the substrate 26 in the lateral direction is provided in the front portion on the upper surface side of the front plate 12a. The vertical wall 28d extends in the front-rear direction and is a thin wall body in the lateral direction. The substrate 26 is provided with a concave cutout portion from the front end of the substrate toward the inside of the substrate, and a vertical wall 28d enters the cutout portion to define the lateral position of the substrate 26.

  3A and 3C, the movable holding portion 29 includes a base portion 29a for placing the rear end of the substrate 26, a deforming portion 29b for biasing the substrate 26 toward the fixed holding portion, and a rear portion of the substrate 26. It has a projection 29c that defines the position in the direction and the upward direction. The base portion 29 a extends in the front-rear direction at the rear portion on the upper surface side of the front plate 12 a and has a flat portion 29 a 1 parallel to the flat portion 28 a 1 of the fixed holding portion 28. At the rear of the front plate 12a, a horizontally long through hole 31 is provided along the rising surface of the step between the front plate 12a and the rear plate 12b. In addition, a through hole 32 (slit) having a lateral length equal to that of the through hole 31 and a narrow width in the front and rear direction is provided in the front portion of the rear plate 12b along the rising surface. The horizontal positions of the through holes 31 and 32 are the same. As a result, a deformed portion 29 b is formed on the rising surface between the through holes 31 and 32. The deformation portion 29b constitutes a part of the above-described vertical plate 12c and has a plate shape extending in the horizontal direction (key arrangement direction). As shown in FIG. 3c, the deformable portion 29b is thinner than the front plate 12a and the rear plate 12b. The left and right ends of the deforming portion 29b are fixed ends that extend in the vertical direction. In other words, when a pressing force in the front-rear direction is applied to the central portion of the deforming portion 29b, the deforming portion 29b is deformed in the front-rear direction using the left and right ends of the deforming portion 29b as fixed ends.

  Further, a projecting portion 29c projects from the front surface at the center of the deformable portion 29b toward the front (that is, the substrate side), and extends further upward. The protrusion 29c has a steeply inclined portion 29c1 that becomes lower from the upper end toward the front. The vertical position of the lower end of the inclined portion 29c1 is substantially the same position as the upper surface of the rear plate 12b. Then, a flat portion 29c2 extending rearward from the lower end of the inclined portion 29c1 and a vertical wall 29c3 extending downward from the rear end of the flat portion 29c2 are provided. The protruding portion 29 c is located in the middle of the left and right side walls of the key 11. Further, the upper end of the protrusion 29c is located above the lower ends of the left and right side walls of the key 11 whose front-rear direction is the same as the protrusion 29c when the key is released. That is, the protrusion 29c enters the inside of the key 11 at the time of key release and key depression.

  A procedure for attaching the board 26 to the frame 12 in the keyboard device configured as described above will be described. First, as shown in FIG. 4, the substrate 26 is allowed to enter the fixed holding portion 28 obliquely so that the upper surface of the front end portion of the substrate 26 is along the chamfered portion of the protrusion 28 c of the fixed holding portion 28. At this time, the lateral position of the substrate 26 is adjusted so that the vertical wall 28d enters the concave notch provided at the front end of the substrate. Next, the rear end of the substrate 26 is brought close to the protruding portion 29 c of the movable holding portion 29 so as to tilt the substrate 26. Then, the rear end of the substrate 26 comes into contact with the inclined portion 29c1, and when the substrate is further tilted, the rear end of the substrate 29 presses the deforming portion 29b backward and deforms due to the action of the inclined portion 29c1. When the rear end of the substrate 26 gets over the inclined portion 29c1, the deformable portion 29b pushes back the substrate 26 forward in order to return to the original position. That is, the movable holding portion 29 biases the substrate 26 toward the fixed holding portion 28 side.

  In a state where the substrate 26 is not attached, the interval between the vertical wall 28 b of the fixed holding portion 28 and the vertical wall 29 c 3 of the movable holding portion 29 is set slightly smaller than the width of the substrate 26. Therefore, in a state where the substrate 26 is attached, the deforming portion 29b is slightly deformed rearward and presses the substrate 26 against the vertical wall 28b. That is, the substrate 26 is in contact with the fixed holding portion 28. Thereby, the position of the board | substrate 26 in the front-back direction is prescribed | regulated. Further, since the vertical distance between the flat portion 29c2 and the flat portion 29a1 of the movable holding portion 29 is set to be substantially the same as the thickness of the substrate, the rear end of the substrate 26 is sandwiched between the flat portion 29c2 and the flat portion 29a1. As a result, the vertical position is also defined. On the other hand, since the vertical distance between the flat portion 28a1 and the flat portion 28c1 of the fixed holding portion 28 is also set to be substantially the same as the thickness of the substrate 26, the front end of the substrate 26 is sandwiched between the flat portion 28a1 and the flat portion 28c1. Thus, the vertical position of the front end of the substrate 26 is defined. That is, the substrate 26 is held between the fixed holding unit 28 and the movable holding unit 29.

  In the above embodiment, the frame 12 is provided with a step, and the deformed portion 29b is configured in the rising surface of the step. The biasing force with which the movable holding portion 29 biases the substrate 26 can be adjusted by changing the lateral length without changing the vertical width of the deformable portion 29b. Therefore, the height of the step provided on the frame 12 can be reduced, and the height of the movable holding portion 29 can be suppressed as compared with the conventional keyboard device. Therefore, even if the swing lever 17 swings as the key is pressed, the swing lever 17 does not interfere with the movable holding portion 29. Further, since the protruding portion 29c is arranged in the middle of the left and right side walls of the key 11, the protruding portion 29c can enter the inside of the key 11 when the key is released and when the key is pressed. Therefore, the distance between the key 11 and the movable holding portion 29 when the key is released can be further reduced. Therefore, the height of the keyboard device can be further suppressed.

  Furthermore, in carrying out the present invention, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the object of the present invention.

  In the above embodiment, the step is provided so that the front plate 12a of the frame 12 is lower than the rear plate 12b. However, instead of the frame 12, as shown in FIG. 5, a frame 35 in which the front plate is higher than the rear plate may be used. That is, the frame 35 includes a front plate 35a and a rear plate 35b that extend in the horizontal direction. The front plate 35a is positioned higher than the rear plate 35b, and the rear end of the front plate 35a and the front end of the rear plate 35b are connected by a vertical plate 35c extending in the lateral direction. Then, a fixed holding portion 36 having the same shape as that of the fixed holding portion 28 and having a front-rear direction opposite to that of the fixed support portion 28 (ie, forward) is provided at the rear portion of the rear plate 35b. On the other hand, a stepped portion formed by the front plate 35a and the rear plate 35b is provided with a movable support portion 37 having the same shape as the movable support portion 29 and having the front and rear directions reversed (that is, rearward). Here, as long as the swing angle of the key 11 is the same, the closer to the front end of the key 11, the greater the amount of displacement in the vertical direction. Therefore, in order to avoid interference between the key 11 and the front plate 35a when the key is pressed, it is necessary to increase the distance between the key 11 and the front plate 35a when the key is released, compared to the above embodiment. Therefore, in this modification, the width in the height direction of a part of the side wall of the key 11 and located above the front plate 35a is made smaller than that in the above embodiment. Other configurations are the same as those in the above embodiment. In order to attach the substrate 26 to the frame 35, the substrate 26 is inclined and the rear end portion is inserted into the fixed holding portion 36, and the front end side is tilted so as to enter the movable holding portion 36. Good. Even if comprised in this way, the effect similar to the said embodiment is acquired.

  In the above-described embodiment and its modification, either the front end or the rear end of the substrate 26 is held by the movable holding portions 29 and 37. However, the front end and the rear end of the substrate 26 may be held by the movable holding portion. In this case, a frame having both the step of the frame 12 and the step of the frame 35 may be used. That is, the vertical cross-sectional shape of the frame is concave at the portion that holds the substrate 26. And the movable support part similar to the movable holding parts 29 and 37 should just be provided in a level | step-difference part. In such a configuration, when the substrate 26 is attached, the front end and the rear end of the substrate 26 are placed on the protrusions of the movable holding portion, and then the entire substrate 26 is pressed downward to What is necessary is just to let a part and a rear-end part penetrate | invade in a movable holding part. Even if comprised in this way, the effect similar to the said embodiment is acquired.

  Moreover, in the said embodiment and its modification, the key 11 was made into the hollow shape open | released below, and the projection part 29c entered the inside of the key 11. As shown in FIG. However, when the key 11 cannot be made hollow open downward (for example, a wooden key), a concave portion may be provided on the lower surface of the key 11 in order to avoid interference between the key 11 and the protrusion 29c. Then, at least when the key is depressed, the projection 29c may enter the recess. If comprised in this way, the height of a keyboard apparatus can be suppressed. If a recess cannot be provided at the lower part of the key 11, it is sufficient to avoid the interference between the key 11 and the protrusion 29c between the upper end of the protrusion 29c and the lower surface of the key 11 when the key is released. It is necessary to provide an interval. In this case, the protrusion 29c does not need to be in the middle of the left and right side walls of the key 11. With this configuration, the height of the keyboard device is slightly larger than that of the above embodiment, but the height can be suppressed as compared with the conventional keyboard device.

  In the above embodiment, the rocking lever 17 is provided to reproduce the key touch feeling of the acoustic piano. However, even a keyboard device for an electronic musical instrument that does not need to reproduce the key touch feeling of an acoustic piano can be configured in the same manner as in the above embodiment. That is, in the above embodiment, the swing lever 17 may be deleted, and a biasing means (for example, a spring) that biases the front end of the key 11 upward may be further provided. Even if comprised in this way, the height of a keyboard apparatus can be suppressed.

DESCRIPTION OF SYMBOLS 11 ... Key, 12 ... Frame, 26 ... Substrate, 28 ... Fixed holding part, 29 ... Movable holding part, 29b ... Elastic piece, 29c ... Projection part, 31, 32 ... through hole

Claims (4)

A plurality of keys pressed and released by the performer, and
A frame that supports the plurality of keys in a vertically swingable manner;
A substrate on which a plurality of switches for detecting a pressed / released state of the plurality of keys are disposed;
A first holding portion provided integrally with the frame and holding a front end portion of the substrate;
In a keyboard device provided with a second holding portion that is provided integrally with the frame and holds a rear end portion of the substrate,
At least one of the first and second holding portions is a deforming portion that extends in the key arrangement direction, and has a fixed end that extends in the up-down direction and extends in the front-rear direction. have a deformable portion deforming,
The deformation part has a protrusion protruding toward the substrate between the left and right side walls of the key,
A keyboard device characterized in that at least when the key is depressed, the upper end of the protrusion is positioned above the lower end of the side wall of the key . A plurality of keys pressed and released by the performer, and
A frame that supports the plurality of keys in a vertically swingable manner;
A substrate on which a plurality of switches for detecting a pressed / released state of the plurality of keys are disposed;
A first holding portion provided integrally with the frame and holding a front end portion of the substrate;
In a keyboard device provided with a second holding portion that is provided integrally with the frame and holds a rear end portion of the substrate,
At least one of the first and second holding portions is a deforming portion that extends in the key arrangement direction, and has a fixed end that extends in the up-down direction, and in the front-rear direction. Having a deformation part to deform,
A step provided on said frame, by extending through holes along the rising surface of the step to the frame, a key board you characterized by being configured the deformation portion and the fixed end to the rising plane apparatus. The deformation part has a protrusion protruding toward the substrate between the left and right side walls of the key,
  3. The keyboard device according to claim 2, wherein the upper end of the protrusion is positioned above the lower end of the side wall of the key at least when the key is pressed. The keyboard device according to any one of claims 1 to 3 , further comprising a swinging member supported by the frame and swinging as the key is pressed and released. .

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