JPH11219162A - Keyboard device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a feeling of keyboard touch resembling the case of an acoustic piano. SOLUTION: A click feeling application member 20 for applying a click feeling to the key 2 of a keyboard chassis 1, is formed out of a turning lever 22 having a lever projection 29, and a leaf spring part 24 for the lever projection 29 to come in contact. Also, the turning lever 22 has the first contact part 26 for a hammer arm to come in contact at the down process of the key 2, and the second contact part 27 for the hammer arm 5 to come in contact at the return process of the key 2. Furthermore, the first contact part 26 is separated upward from the second contact part 27 at a prescribed gap. As a result, a through-feeling of key touch is applied to the key 2 when the hammer arm 5 comes in contact with the first contact part 26 and the lever projection 29 gets over a restriction projection 30 at a down process. On the other hand, a click feeling for the key 2 is alleviated and a feeling of key touch resembling the case of an acoustic piano can be provided at a return process, when the hammer arm 5 comes in contact with the second contact part 26 and the lever projection 29 gets over the restriction projection 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art In a keyboard instrument such as an electronic piano, a hammer arm having a predetermined weight is provided below a key so as to be vertically rotatable in order to obtain a key touch feeling similar to that of an acoustic piano. In some cases, a predetermined action load is applied to a key by rotating the hammer arm against its own weight in accordance with a key pressing operation. In such a keyboard instrument, when a hammer arm is simply rotatably attached to a keyboard chassis that rotatably supports a key, a predetermined action load can be applied to the key, but it can be obtained with an acoustic piano. It is not possible to obtain a key touch feeling similar to a key touch feeling that comes off. Therefore, conventionally, a keyboard device provided with a click feeling imparting means has been developed so that such a key touch feeling can be obtained.

FIG. 15 is a diagram showing an example. This keyboard device includes a keyboard chassis 1 incorporated in a musical instrument case. The keyboard chassis 1 has a front end (left end in the figure) 1a bent in a concave shape, an upper front end further bent in an L shape, and a rear end (right end in the figure) 1b. Folded into a U-shape, front end 1a
And the bottom of the U-shaped portion of the rear end 1b are formed at substantially the same height. On the keyboard chassis 1, a plurality of keys (white keys and black keys, but black keys will be described here) 2 made of synthetic resin are arranged in parallel. In this case, each key 2 is rotatably attached to a shaft 4 of a key support 3 provided on a rear end 1b of the keyboard chassis 1 at a lower portion of a rear end (right end in the figure). It is configured to rotate up and down around the shaft 4.

[0004] A hammer support shaft 6 for rotatably supporting the hammer arm 5 in the vertical direction is provided on the keyboard chassis 1 corresponding to an intermediate portion of the key 2. The hammer arm 5 includes an upper end portion 5a, an intermediate portion 5b, and a lower end portion 5a.
c, the middle portion 5b is rotatably supported by the hammer support shaft 6, and the lower end portion 5c is an opening 1c of the keyboard chassis 1.
The weight 7 is provided in the rear end 1b of the keyboard chassis 1 and the weight 7 is provided at the lower end 5c. The weight 7 is urged clockwise in FIG. The key 2 is urged upward by contacting the lower surface. As shown in FIG. 15, the hammer arm 5 is normally urged downward by the weight of the weight 7, and the lower surface of the projection 5d provided at the tip of the lower end 5c is connected to the rear end of the keyboard chassis 1. When the key 2 is depressed against the weight of the weight 7, it abuts against a lower limit stopper 8 such as a felt provided on the bottom of the key 1 b and is restricted to a predetermined lower limit position. The upper surface of the projection 5d of the lower end 5c of the hammer arm 5 abuts against an upper limit stopper 9 such as a felt provided on the upper inner surface of the rear end 1b of the keyboard chassis 1,
This restricts the position to a predetermined upper limit position.

[0005] The rear end 1b of the keyboard chassis 1 behind the lower end 5c of the hammer arm 5 (to the right in the figure).
Is provided on the bottom portion of the key 2 with a click feeling imparting member 10 for imparting a key touch feeling similar to the key touch feeling of the escape feeling obtained by the acoustic piano to the key 2. As shown in FIGS. 15 and 16, the click feeling imparting member 10 includes a synthetic resin roller support 11 fixed on the bottom of the rear end 1b of the keyboard chassis 1. The roller support 11 is provided with a leaf spring 1 at a position corresponding to each key 2.
1a is formed in a substantially L-shape and extends upward, and has a structure in which a mounting frame 11b to which a roller 12 is rotatably mounted is formed at an upper end of the leaf spring portion 11a. The click sensation imparting member 10 comes into contact with the roller 12 after the tip of a protrusion 5 d provided on the lower end 5 c of the hammer arm 5 contacts the roller 12 when the key is pressed, and then the leaf spring 11 a of the roller support 11
Key 2 when it gets over roller 12 against the spring force of
Gives a key touch feeling of falling out.

Each key 2 is urged upward by a hammer arm 5. Usually, an L-shaped stopper piece 13, which is vertically provided at the front end of each key 2, is provided at the front end of the keyboard chassis 1. By contacting upper limit stoppers 14 such as felt provided on the lower surfaces on both sides of the concave portion in FIG. 1a, the position is regulated to a predetermined initial position (upper limit position). Each key 2 has a rubber switch 15 when the key is pressed.
A switch pressing part 16 for pressing the switch is provided. The rubber switch 15 is provided with two sets of fixed contacts and movable contacts inside. The rubber switch 15 is provided on a circuit board 17 provided on the lower surface of an intermediate portion of the keyboard chassis 1. Projecting upward through 1d, the switch pressing portion 16 of the key 2 is pressed to be spaced apart and opposed.

In such a keyboard device, when the key 2 is pressed against the weight of the weight 7 of the hammer arm 5, the key 2 pivots downward about the rear end shaft 4, and The hammer arm 5 pivots counterclockwise in FIG. 15 around the hammer support shaft 6 at the intermediate portion 5b.
After the switch pressing portion 16 presses the rubber switch 15, the protrusion 5 d of the hammer arm 5 gives a click feeling that the key 2 is pulled out of the key 2 over the roller 12 of the click feeling imparting member 10, and thereafter, the protrusion 5 d Is the upper limit stopper 9
, The rotation of the hammer arm 5 and the key 2 is stopped. Thereafter, the hammer arm 5 rotates clockwise in FIG. 15 due to the weight of the weight 7, performs the reverse operation, and the key 2 returns to the initial position shown in FIG.

The key load for the key stroke at this time will be described in detail with reference to FIG. First, key 2
When the key 2 starts rotating, the weight of the weight 7 of the hammer arm 5 acts on the key 2 when the key 2 starts rotating, so that the key load suddenly increases, and A When the point 2 is reached, the rotation speed of the hammer arm 5 becomes substantially constant, so that the key load becomes substantially constant. In this state, when the key 2 rotates and reaches the point B, the switch pressing portion 16 of the key 2 The key load is further increased because it is pressed against the rubber switch 15. Then, when the key 2 rotates and reaches the point C,
Since the tip of the projection 5d of the lower end 5c of the hammer arm 5 abuts against the roller 12 of the click feeling imparting member 10 from below and deflects the leaf spring 11a of the roller support 11, the key load suddenly increases. That is, when the leaf spring 11a bends, the repulsive force of the leaf spring 11a is
Acts in the direction of pushing down, so the key load suddenly increases.

After that, when reaching the point D, the projection 5d of the hammer arm 5 rides over the roller 12 against the spring force of the leaf spring 11a, so that the key load is sharply reduced. At this time, the repulsive force due to the bending of the leaf spring portion 11a acts in a direction to push up the hammer arm 5, so that the key load is sharply reduced. As a result, the click feeling of the key 2 is given. Then, when the key 2 further rotates and reaches the point E, the protrusion 5d of the hammer arm 5 comes into contact with the upper limit stopper 9, so that the key load rapidly increases, and the rotation of the hammer arm 5 and the key 2 is reduced. Stop.

In the return stroke in which the key 2 reaches the lower limit position and rotates upward, the hammer arm 5 rotates downward due to the weight of the weight 7 of the hammer arm 5, so that the key load drops sharply. When reaching the point F where the key load is lighter than the point E in the going stroke, the tip of the protrusion 5d of the hammer arm 5 comes into contact with the roller 12 of the click feeling imparting member 10 from above and the roller support Since the eleventh plate spring portion 11a is bent, the key load is further reduced. That is, at this time, the repulsive force due to the bending of the leaf spring portion 11a acts in a direction to push up the hammer arm 5, so that the key load applied to the key 2 by the hammer arm 5 is reduced. When the protrusion 5d of the hammer arm 5 rides over the roller 12 against the spring force of the leaf spring 11a, the repulsive force due to the bending of the leaf spring 11a acts in a direction to push down the hammer arm 5, so that the hammer 5 The key 2 is pushed up by the arm 5, and the key load is suddenly increased.

Thereafter, when reaching the point G, the projection 5d of the hammer arm 5 is separated from the leaf spring 11a, and the repulsive force of the leaf spring 11a does not act on the hammer arm 5, so that
The key load decreases rapidly. As a result, the click feeling is given to the key 2 even in the return stroke in which the key 2 rotates upward. The point G occurs after the time difference TH of the hysteresis with respect to the point D in the outbound stroke. When the key 2 rotates to reach the point H, the key load is further reduced due to the repulsive force of the switch pressing portion 16 being pushed up by the rubber switch 15, and when the key 2 reaches the point I, the switch pressing portion 1 is switched.
6 is separated from the rubber switch 15, and the hammer arm 5 rotates at a substantially constant speed, so that the key load becomes substantially constant. In this state, when the hammer arm 5 and the key 2 rotate and reach the point J, the protrusion 5d of the hammer arm 5 comes into contact with the lower limit stopper 8 and stops rotating, so that the key load is rapidly reduced. Then, the stopper piece 13 of the key 2 comes into contact with the upper limit stopper 14, and the key 2 returns to the initial position.

[0012]

In such a keyboard device, when a key 2 is depressed and the key 2 rotates downward,
After the hammer arm 5 rotates upward and its projection 5d abuts against the roller 12 of the click feeling imparting member 10, the hammer arm 5 climbs over the roller 12 against the spring force of the leaf spring 11a of the roller support 11. With the key 2, the click feeling of the exit feeling similar to the key touch feeling of an acoustic piano
Can be provided. However, even in the return stroke in which the hammer arm 5 rotates downward and the key 2 rotates upward, the projection 5d of the hammer arm 5 abuts on the roller 12 and resists the spring force of the leaf spring 11a. As a result, a click feeling is given to the key 2, and there is a problem that a click feeling occurs in a return stroke which is not inherent in an acoustic piano. Further, when a click feeling is generated in the return stroke, the return speed of the hammer arm 5 is reduced, and accordingly, the return of the key 2 to the initial position is delayed. .

SUMMARY OF THE INVENTION It is an object of the present invention to provide an acoustic piano in which a key touch feeling such as a key coming out of a key in a going stroke in which the key rotates downward when the key is pressed is reduced, and a clicking feeling to the key is reduced in a returning stroke. A key touch feeling similar to the key touch feeling is to be obtained.

[0014]

According to the first aspect of the present invention,
A keyboard chassis, a plurality of keys provided on the keyboard chassis so as to be rotatable in a vertical direction, and a plurality of keys provided corresponding to the plurality of keys to urge the keys upward to depress the keys. A hammer arm for rotating and displacing with the operation to apply an action load to the key, and a click feeling imparting member for imparting a click feeling to each of the plurality of keys; A lever projection is provided at a location, and includes a rotating lever that rotates vertically when a key is pressed, and a regulating member that the lever projection of the rotating lever comes into contact with and moves over, and the rotating lever is configured to be pressed when the key is pressed. A first contact portion in which a part of the key or a part of the hammer arm abuts from below in a forward stroke in which the key rotates downward; and a first contact portion in which the key rotates in a return stroke in which the key rotates upward. Part or the hammer Second part of the arm abuts from above
A contact portion, wherein the first contact portion is separated from the second contact portion by a predetermined distance upward.

According to the present invention, in the going stroke in which the key rotates downward when the key is pressed, a part of the key or a part of the hammer arm contacts the first contact portion of the rotating lever from below and rotates. When the moving lever rotates and the lever projection of the rotating lever comes into contact with the regulating member and gets over it, the repulsive force of the regulating member acts in a direction to push down the hammer arm, so that the key load becomes suddenly heavy and the lever projection becomes heavy. When the vehicle gets over the restricting member, the key load is suddenly reduced, so that the key can be given a key touch feeling that the acoustic piano comes off. In the return stroke in which the key rotates upward, the hammer arm rotates while pushing the key upward by its weight, and a part of the key or a part of the hammer arm contacts the second contact portion of the rotating lever. When the lever comes into contact with from above and rotates in the opposite direction, and when the lever projection of the rotating lever comes into contact with the regulating member and gets over it, the repulsive force of the regulating member acts in the direction of pushing up the hammer arm, so the key The load becomes lighter. That is, at this time, since the second contact portion is separated from the first contact portion by a predetermined distance, the hammer arm rotates at a speed due to its weight, and one of the keys is rotated according to the speed of the hammer arm. The part or the part of the hammer arm collides with the second contact part, and the impact causes the pivot lever to pivot rapidly and the lever projection to jump over the regulating member, so that the key load is reduced for a moment. As a result, a click feeling for the key in the return stroke is reduced, and a key touch feeling similar to that of an acoustic piano can be obtained.

According to a second aspect of the present invention, there is provided a keyboard chassis,
A plurality of keys provided on the keyboard chassis so as to be rotatable in the vertical direction, and a plurality of keys are provided corresponding to the plurality of keys, respectively, and the keys are urged upward to accompany the key pressing operation of the keys. A hammer arm for rotating and applying an action load to the key; and a click feeling imparting member for imparting a click feeling to each of the plurality of keys, wherein the click feeling imparting member has a projection on an outer peripheral surface. A rotating body that is provided and rotates vertically when a key is pressed, and a restricting portion that the protrusion of the rotating body comes into contact with and gets over, and these are provided on the key or the hammer arm, and the rotating body is A first contact portion which contacts the upper limit stopper for the rotating body provided on the keyboard chassis side from below during a forward stroke in which the key rotates downward when the key is pressed, and a return stroke in which the key rotates upward in a return stroke. The keyboard chassis side And having a second contact portion which abuts from above provided the rotary body for the lower limit stopper.

According to the present invention, in the going stroke in which the key rotates downward when the key is pressed, the rotating body moves upward with the rotation of the key or the hammer arm, and the first contact portion of the rotating body. Abuts against the upper limit stopper for the rotating body from below, and the rotating body rotates, and when the protrusion of the rotating body comes into contact with the regulating portion and gets over, the repulsive force by the regulating portion acts in a direction to push down the hammer arm, When the key load suddenly becomes heavy and the protrusions get over the restricting portion, the key load suddenly becomes light, thereby giving the key a key touch feeling as if the acoustic piano were coming off. In the return stroke in which the key rotates upward, the hammer arm rotates while pushing up the key by its weight, and accordingly, the rotating body moves downward, and the second abutting portion moves to the lower limit stopper for the rotating body. When the rotating body rotates in the opposite direction and the protrusion of the rotating body abuts on the restricting portion and gets over the restricting portion, the repulsive force of the restricting portion acts in a direction to push up the hammer arm, so that the key load is applied. Becomes lighter. That is, at this time, the hammer arm rotates at a speed due to its weight, the rotating body descends with the speed of the hammer arm, the second contact portion collides with the lower limit stopper for the rotating body, and the impact causes the rotating body to rotate. Since the moving body rapidly rotates and the protrusions rapidly climb over the restricting portion, the key load is reduced for a moment. As a result, a click feeling for the key in the return stroke is reduced, and a key touch feeling similar to that of an acoustic piano can be obtained.

According to a third aspect of the present invention, there is provided a keyboard chassis,
A plurality of keys provided on the keyboard chassis so as to be rotatable in a vertical direction; and a click feeling imparting member for imparting a click feeling to each of the plurality of keys. A rotating body that is provided with a regulating projection and rotates vertically when a key is pressed, and the rotating body is attached, and prevents rotation of the rotating body in a going stroke in which the key rotates downward when the key is pressed, and A clutch member that makes the rotating body rotatable in a return stroke in which the key rotates upward, and an elastic projection that contacts one of the plurality of regulating projections of the rotating body when the key is pressed. Features.

According to the present invention, the rotation of the rotating body is prevented by the clutch member during the forward stroke in which the key rotates downward when the key is pressed, so that the elastic projection and the regulating projection of the rotating body relatively come into contact with each other. Even if it touches, the rotating body does not rotate, and the elastic projection elastically deforms and gets over the regulating projection. At this time, the repulsive force due to the elastic force of the elastic projection acts in the direction to push down the hammer arm, so the key load Suddenly becomes heavier,
When the elastic projections get over the regulating projections, the key load is suddenly reduced, thereby giving the keys a key touch feeling as if the acoustic piano were coming off. Also, in the return stroke in which the key rotates upward, the rotating body becomes rotatable by the clutch member, so that the hammer arm rotates while pushing up the key by its weight to rotate the elastic projection and the regulating projection of the rotating body. Are relatively in contact with each other, the elastic projection does not elastically deform, and the rotating body is rotated by the elastic projection so that the elastic projection rides over the regulating projection, so that the key load does not become heavy. As a result, there is almost no click feeling on the key in the return stroke, and a key touch feeling similar to that of an acoustic piano can be further obtained.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] A first embodiment of a keyboard device according to the present invention will be described below with reference to FIGS. The same parts as those in the conventional example shown in FIGS. 15 to 17 are denoted by the same reference numerals, and description thereof will be omitted.
In this keyboard device, the click feeling imparting member 20 is different from the conventional example, and has the same configuration as the conventional example except for this. As shown in FIGS. 1 and 2, the click feeling imparting member 20 includes a support 21 provided on the bottom of the rear end 1 b of the keyboard chassis 1 behind the hammer arm 5 (to the right in FIG. 1). Have. A rotating lever 22 is attached to the upper portion of the support 21 so as to be rotatable vertically by a lever shaft 23. A leaf spring portion (restriction member) 24 is provided on the bottom of the support 21 at the upper portion. It is erected close to the lever shaft 23.

The pivot lever 22 includes a first contact portion 26 with which the distal end 25 of the lower end 5c of the hammer arm 5 contacts from below in a forward stroke in which the key 2 pivots downward when the key is pressed, In the return stroke rotating upward, the tip 2 of the hammer arm 5
5 has a second contact portion 27 contacting from above, and the first contact portion 26 is separated from the second contact portion 27 by a predetermined distance upward, and these first and second contact portions 26, 27 Is formed in a substantially U-shape, and an arm portion 28 is formed to extend rearward (to the right in FIG. 1) at a substantially central portion of an intermediate portion thereof, and a rear end of the arm portion 28 is turned around the lever shaft 23. It is movably mounted, and has a configuration in which a lever projection 29 is provided on the outer peripheral surface of an arm portion 28 located around the lever shaft 23. In this case, the lower second contact portion 27 is formed to be longer than the upper first contact portion 26. On the other hand, on the upper part of the leaf spring part 24, a lever projection 29 of the arm part 28 abuts, and there is provided a regulating projection 30 which gets over the spring force of the leaf spring part 24 and overcomes it. The first inner surface of the rear end portion 1b of the keyboard chassis 1 has a first lever
A lever stopper 31 with which the contact portion 26 contacts is provided. In the initial state where the key is not pressed, the rotating lever 22 is held at a predetermined position shown in FIG.

In such a keyboard device, as in the conventional example,
When the key 2 is pressed against the weight of the weight 7 of the hammer arm 5, the key 2 rotates downward around the shaft 4 and the hammer arm 5 moves about the hammer support shaft 6 in FIG. After rotating counterclockwise, the switch pressing portion 16 of the key 2
Presses the rubber switch 15. Thereafter, as shown in FIG. 2, the tip 25 of the hammer arm 5 is
Abuts on the first contact portion 26 from below, whereby the first contact portion 26 is pushed up and the rotating lever 22 is moved to the lever shaft 2.
1 is rotated clockwise in FIG. At this time, as shown in FIG. 3A, the lever projection 29 of the rotating lever 22 comes into contact with the restriction projection 30 of the leaf spring portion 24 and gets over the restriction projection 30 against the spring force of the leaf spring portion 24. At this time, the repulsive force due to the spring force of the leaf spring portion 24 acts in the direction of pushing down the hammer arm 5, so that the key load suddenly increases as shown from the point C to the point D in FIG.
When the lever projection 29 gets over the regulating projection 30 as shown in FIG. 4B, the key load suddenly decreases as shown from the point D to the point E in FIG. Thereby, the key 2 is given a key touch feeling that the acoustic piano comes off. Thereafter, the first contact portion 26 of the rotating lever 22 contacts the stopper 31 for the lever, the upper surface of the lower end 5c of the hammer arm 5 contacts the upper limit stopper 9, and the rotation of the hammer arm 5 and the key 2 is performed. Stops.

Thereafter, when the hammer arm 5 pivots clockwise in FIG. 2 due to the weight of the weight 7, the key 2 pivots upward accordingly, and the tip end 25 of the hammer arm 5 pivots to the pivot lever 22. Abuts on the second abutting portion 27 from above, whereby the second abutting portion 27 is pushed down and
2 rotates counterclockwise in FIG.
Lever projection 29 abuts on the regulating projection 30 of the leaf spring portion 24 and goes over the regulating projection 30 against the spring force of the leaf spring portion 24. At this time, the repulsive force due to the spring force of the leaf spring portion 24 acts in a direction to push up the hammer arm 5, so that the key load is reduced as shown at point G in FIG. That is, at this time, the second contact portion 27 is
, The hammer arm 5 rotates at a speed due to its weight, and the tip end 25 of the hammer arm 5 collides with the second contact portion 27 due to the speed of the hammer arm 5. Rotating lever 2 by impact
Since the lever 2 is rapidly rotated and the lever projection 29 abruptly passes over the regulating projection 30, the key load is reduced for a moment, as shown at point G in FIG. In this case, since the length of the second contact portion 27 is particularly longer than that of the first contact portion 26,
A larger force acts on the lever protrusion 29 in the return stroke than in the going stroke, and the lever protrusion 29 also suddenly climbs over the regulating protrusion 30 and the key load is reduced for a moment. Therefore, the click feeling is hardly given to the key 2. After that, the rotating lever 22 returns to the initial position shown in FIG. 1, and the hammer arm 5 and the key 2 rotate to return to the initial position shown in FIG.

As described above, in this keyboard device, the hammer arm 5 is not moved in the forward stroke in which the key 2 rotates downward when the key is pressed.
Of the rotating lever 22 pushes up the first abutting portion 26, thereby rotating the rotating lever 22 to rotate the lever projection 2 of the rotating lever 22.
Since the key 9 rides over the restricting projection 30 against the spring force of the leaf spring portion 24, the key 2 can be given a key touch feeling that the acoustic piano comes off, and the return stroke in which the key 2 rotates upward. Then, when the hammer arm 5 rotates while pushing up the key 2 by its weight, and when the tip portion 25 of the hammer arm 5 contacts the second contact portion 27 of the rotating lever 22 from above, the speed of the hammer arm 5 is increased. As a result, the tip end portion 25 of the hammer arm 5 collides with the second contact portion 27, and the impact causes the turning lever 22 to turn sharply and the lever projection 29 to jump over the regulating projection 30. This makes it possible to reduce the click sensation on the key 2 in the return stroke, thereby obtaining a key touch feeling similar to that of an acoustic piano.
Further, when the click feeling to the key 2 is reduced in the return stroke of the key 2, the return speed of the hammer arm 5 becomes faster than that of the conventional one, and accordingly, the return of the key 2 to the initial position becomes faster. And the hitting performance is improved.

In the first embodiment, the tip 25 of the hammer arm 5 is brought into contact with the first and second contact portions 26 and 27 of the turning lever 22 so that the turning lever 22 is turned. However, the present invention is not limited to this. For example, as shown in FIG.
A projection 32 is provided at the rear end of the key 2, and the projection 32 abuts the first and second contact portions 26, 27 of the rotating lever 22 from above and below to rotate the rotating lever 22 vertically. You may make it move. In this case, a support 21 may be provided on the rear end 1b of the keyboard chassis 1, and the pivot lever 22 and the leaf spring 24 may be attached to the support 21 as in the first embodiment. Even in this case, it goes without saying that the same operation and effect as those of the first embodiment are obtained.

In the first embodiment, the first and second contact portions 26 and 27 of the rotary lever 22 are formed in a U-shape, and the arm portion 28 is provided substantially at the center of the intermediate portion. However, the present invention is not limited to this, and the first and second contact portions 26 and 27
Is provided on the upper side of the U-shaped intermediate portion, and the distance from the lever shaft 23 to the tip of the first contact portion 26 is smaller than the distance from the lever shaft 23 to the tip of the first contact portion 26. It may be formed long. By doing so, the first shaft from the lever shaft 23
Since the distance to the tip of the second contact portion 27 is longer than the distance to the tip of the contact portion 26, a greater force acts on the lever protrusion 29 in the return stroke than in the forward stroke when the key is pressed. This makes it possible to further reduce the click feeling of the key 2 in the return stroke, and to further obtain a key touch feeling similar to that of an acoustic piano.

[Second Embodiment] Next, a keyboard device according to a second embodiment of the present invention will be described with reference to FIGS. In this case, the same parts as those of the first embodiment shown in FIGS. 1 to 4 are denoted by the same reference numerals, and the description thereof will be omitted. In this keyboard device, the click feeling imparting member 35 is the first
Other than this, the configuration is the same as that of the first embodiment except for this. As shown in FIGS. 6 and 7, the click feeling imparting member 35 is
6 and a regulating portion 37 for regulating the rotation of the rotating body 36
, Which are provided at the distal end 25 of the lower end 5c of the hammer arm 5.

The rotating body 36 is a disk made of synthetic resin.
The center thereof is rotatably attached to the distal end 25 of the hammer arm 5 by a support shaft 38. This rotating body 36
An elastic projection 40 is provided on an outer peripheral portion of the outer peripheral portion corresponding to the arc-shaped slit hole 39 formed in a part thereof. The elastic projection 40 is configured to get over the regulating portion 37 by abutting against the regulating portion 37 and being elastically deformed. Further, first and second contact portions 41 and 42 are provided on the outer peripheral portion of the rotating body 36 corresponding to the elastic projections 40 so as to protrude rearward (to the right in FIGS. 6 and 7). The first abutment portion 41 moves upward with the rotation of the hammer arm 5 during the forward stroke in which the key 2 rotates downward when the key is pressed, and the upper portion in the rear end portion 1b of the keyboard chassis 1 It comes into contact with the upper limit stopper 43 for the rotating body provided on the inner surface from below. Further, the second contact portion 42 moves downward with the rotation of the hammer arm 5 during the return stroke in which the key 2 rotates upward, and moves to the bottom in the rear end portion 1b of the keyboard chassis 1. It comes into contact with the provided lower limit stopper 44 for the rotating body from above.

In such a keyboard device, as in the conventional example,
When the key 2 is pressed against the weight of the weight 7 of the hammer arm 5, the key 2 pivots downward about the shaft 4 and the hammer arm 5 moves about the hammer support shaft 6 in FIG. After rotating counterclockwise, the switch pressing portion 16 of the key 2
Presses the rubber switch 15. Thereafter, as shown in FIG. 7, the rotating body 36 provided at the tip end 25 of the hammer arm 5 moves upward, and the first contact portion 4 of the rotating body 36 is moved.
1 contacts the upper limit stopper 43 for the rotating body of the keyboard chassis 1 from below, whereby the rotating body 36 rotates about the support shaft 38. At this time, the elastic projections 40 of the rotating body 36
Abuts on the restricting portion 37, and when the elastic projection 40 elastically deforms with the rotation of the rotating body 36 and gets over the restricting portion 37,
Since the repulsive force due to the elastic deformation of the elastic projection 40 acts in the direction of pushing down the hammer arm 5, the point C in FIG.
As shown by the dots, the key load suddenly increases, and FIG.
When the elastic projection 40 gets over the restricting portion 37 as shown in FIG. 9, the key load suddenly decreases as shown from the point D to the point E in FIG. Thereby, the key 2 is given a key touch feeling that the acoustic piano comes off. Thereafter, the upper surface of the lower end 5c of the hammer arm 5 comes into contact with the upper limit stopper 9, and the rotation of the hammer arm 5 and the key 2 stops.

Thereafter, when the hammer arm 5 pivots clockwise in FIG. 7 due to the weight of the weight 7, the key 2 pivots upward accordingly, and the pivot provided at the distal end 25 of the hammer arm 5 rotates. The moving body 36 moves downward. At this time, like the conventional example, the key load suddenly drops and becomes lighter,
The point shifts to the point H via the point F where the key load is lighter than the point E in the going stroke, and the switch pressing portion 16 of the key 2 is moved to the rubber switch 15.
When the switch pressing portion 16 reaches the point I and the switch pressing portion 16 separates from the rubber switch 15, the hammer arm 5 rotates at a substantially constant speed. Become. Thereafter, the second contact portion 42 of the rotating body 36 comes into contact with the lower limit stopper 44 for the rotating body of the keyboard chassis 1 from above, and as shown in FIG. 36 elastic projections 4
0 abuts on the restricting portion 37, and the elastic projection 40 elastically deforms to get over the restricting portion 37. At this time, the repulsive force due to the elastic force of the elastic projections 40 acts in the direction of pushing up the hammer arm 5, so that the key load is momentarily reduced as shown at point G in FIG. That is, the rotating body 36 rotates from the upper limit position to the lower limit position of the hammer arm 5, and at this rotating speed, the second contact portion 42 moves downward and collides with the lower limit stopper 44. The key 36 is rapidly rotated, and the elastic projection 40 is elastically deformed, so that the key 37 abruptly passes over the restricting portion 37. As a result, the key load is reduced for a moment as shown at point G in FIG. Therefore, the click feeling is hardly given to the key 2. After that, as in the conventional example, the hammer arm 5 and the key 2 rotate to return to the initial position shown in FIG.

As described above, in this keyboard device, the hammer arm 5 is not moved in the forward stroke in which the key 2 rotates downward when the key is pressed.
As a result, the rotating body 36 moves upward, and the first contact portion 41 of the rotating body 36 comes into contact with the rotating body upper limit stopper 43 from below to rotate the rotating body 36, whereby the rotating body 3 is rotated.
The elastic projection 40 of FIG. 6 elastically deforms and passes over the restricting portion 37, so that the key 2 can be given a key touch feeling that the acoustic piano comes off. Also, in the return stroke in which the key 2 rotates upward, the hammer Rotating body 3 together with arm 5
6 moves downward, and when the second contact portion 42 of the rotating body 36 contacts the lower limit stopper 44 for the rotating body from above, the rotating body 36 descends with the rotation speed of the hammer arm 5 and the second 2 The contact portion 42 collides with the lower limit stopper 44 for the rotating body,
The rotating body 36 is rapidly rotated by the impact, and the elastic projection 40 suddenly climbs over the restricting portion 37, so that the key load is reduced for a moment, thereby reducing the click feeling on the key 2 in the return stroke, and the acoustic. A key touch feeling similar to that of a piano can be obtained. Further, when the click feeling on the key 2 is reduced in the return stroke, the return speed of the hammer arm 5 becomes faster than the conventional one, similarly to the first embodiment, and accordingly, the key 2 returns to the initial position. Also improves the hitting performance.

In the second embodiment, the rotary body 36 and the restricting portion 37 are provided at the distal end portion 25 of the hammer arm 5, but the present invention is not limited to this. For example, as shown in FIG. Alternatively, a configuration may be employed in which the projection 32 is provided on the portion, and the rotating body 36 and the regulating portion 37 are provided on the projection 32. In this case, the support member 45 is provided on the rear end 1b of the keyboard chassis 1.
And an upper limit stopper 43 for the rotating body, which the first contact portion 41 of the rotating body 36 contacts from below, on the upper lower surface of the supporting member 45, and the second contacting of the rotating body 36 on the lower upper surface of the supporting member 45. What is necessary is just to provide the lower limit stopper 44 for the rotating bodies with which the part 42 contacts from above. Even in this case, it goes without saying that the same operation and effect as those of the second embodiment can be obtained.

In the second embodiment, the rotating body 36
The first and second contact portions 41 and 42 are formed to have substantially the same length. However, the present invention is not limited to this.
It may be formed longer. By doing so, the distance from the support shaft 38 to the tip of the first contact portion 41 is longer than the distance from the tip of the first contact portion 41, so that the return stroke is more elastic than the going stroke. A large force can be applied to the projection 40, whereby the click feeling on the key 2 in the return stroke can be further reduced, and a key touch feeling similar to that of an acoustic piano can be obtained. it can.

Further, in the second embodiment, the rotating body 3
6, an elastic projection 40 is provided, and the elastic projection 40 is configured to be elastically deformed by contacting the restricting portion 37. However, the present invention is not limited to this. A structure in which a protrusion that does not elastically deform may be provided on 36. Even in this case, it goes without saying that the same operation and effect as those of the second embodiment can be obtained.

[Third Embodiment] Next, a keyboard device according to a third embodiment of the present invention will be described with reference to FIGS. In this case, the same parts as those of the first embodiment shown in FIGS. 1 to 4 are denoted by the same reference numerals, and the description thereof will be omitted. In this keyboard device, the click feeling imparting member 50 is different from that of the first embodiment, and has the same configuration as that of the first embodiment except for this. This click feeling imparting member 50 is similar to that shown in FIG.
As shown in FIG. 1 and FIG. 12, the rear end 1b of the keyboard chassis 1 behind the hammer arm 5 (to the right in the figure).
Is provided with a support body 51 provided at the bottom of the first member. On the upper part of the support body 51, a rotating body 5 is provided via a clutch member 52.
3 is mounted so as to be rotatable in only one direction. The clutch member 52 is a one-way clutch, a ratchet wheel, or the like, and is provided above the support body 51, and has a structure that rotates only counterclockwise in FIGS. 11 and 12 and does not rotate clockwise.

The rotating body 53 is attached to the clutch member 52, and the direction of rotation is regulated by the clutch member 52. That is, when the tip end portion 25 of the hammer arm 5 moves upward in the going stroke in which the key 2 rotates downward when the key is pressed, the rotation member 53 is prevented from rotating in that direction by the clutch member 52, When the distal end portion 25 of the hammer arm 5 moves downward during the return stroke in which the key 2 rotates upward, the clutch member 52 restricts rotation in that direction. The rotating body 5
A plurality of projections 54 are provided at substantially equal intervals on the outer peripheral surface of 3. On the other hand, the distal end 25 of the lower end 5 c of the hammer arm 5 is provided with an elastic projection 55 that contacts the projection 54 of the rotating body 53. This elastic projection 55 is formed in a slit hole 5 formed in a part of the tip 25 of the hammer arm 5.
6, the elastic deformation is possible.

In such a keyboard device, as in the conventional example,
When the key 2 is pressed against the weight of the weight 7 of the hammer arm 5, the key 2 pivots downward around the shaft 4 and the hammer arm 5 moves about the hammer support shaft 6 in FIG. After turning counterclockwise, the switch pressing portion 1 of the key 2
6 presses the rubber switch 15. Thereafter, as shown in FIG. 12, the distal end portion 25 of the hammer arm 5 moves upward, and the elastic projection 55 contacts the projection 54 of the rotating body 53 from below. At this time, since the rotation of the rotating body 53 is prevented by the clutch member 52, the elastic projection 55 is elastically deformed and rides over the projection 54. At this time, the repulsive force due to the elastic deformation of the elastic projection 55 is reduced by the hammer arm. When the elastic projection 55 gets over the projection 54 of the rotating body 53 as shown in the points C to D in FIG.
As shown from the point D to the point E in FIG. 3, the key load suddenly decreases. Thereby, the key 2 is given a key touch feeling that the acoustic piano comes off. Thereafter, the upper surface of the lower end 5c of the hammer arm 5 contacts the upper limit stopper 9, and the rotation of the hammer arm 5 and the key 2 stops.

Thereafter, when the hammer arm 5 rotates clockwise in FIG. 12 due to the weight of the weight 7, the key 2 rotates upward accordingly, and the elastic projection 5 of the hammer arm 5 rotates.
5 comes into contact with the projection 54 of the rotating body 53 from above. At this time, the rotating body 53 is moved by the clutch member 52 as shown in FIG.
Is rotatable in the counterclockwise direction, so that the elastic projection 55 of the hammer arm 5
4 is pushed and the rotating body 53 rotates, and the elastic projection 55 gets over the projection 54 of the rotating body 53 without being elastically deformed.
For this reason, since the elastic projection 55 hardly hinders the rotation of the hammer arm 5, the key load is reduced as it is from the point F to the point H in FIG. Thus, even if the elastic projection 55 climbs over the projection 54 of the rotating body 53, the key load does not become heavy, and the key 2 is not provided with a click feeling. After that, as in the conventional example, the hammer arm 5 and the key 2 rotate to return to the initial position shown in FIG.

As described above, in this keyboard device, the clutch member 52 is not moved during the forward stroke in which the key 2 rotates downward when the key is pressed.
Since the rotation of the rotating body 53 is prevented by the rotation of the hammer arm 5, the elastic projection 55
When the abutment comes in contact with the projection 54 from below, the elastic projection 55 is elastically deformed and rides over the projection 54, so that the key 2 can be given a key touch feeling that the acoustic piano comes out of. In the return stroke in which the rotary member 53 is rotatable upward by the clutch member 52, the hammer arm 5 rotates while pushing up the key 2 by its weight, and the tip end 25 of the hammer arm 5 is rotated. When the elastic projection 55 comes into contact with the projection 54 of the rotating body 53, the rotating body 53 is rotated by the elastic projection 55, whereby the elastic projection 55 is not elastically deformed.
The key load does not become heavy because it gets over the protrusion 54 of the above.
For this reason, there is no click feeling for the key 2 in the return process,
A key touch feeling similar to that of an acoustic piano can be obtained. In addition, since there is no click feeling on the key 2 in the return stroke, compared to the first embodiment,
The return speed of the hammer arm 5 is increased, and the return of the key 2 to the initial position is also accelerated. Accordingly, the hitting performance is further improved.

In the third embodiment, the elastic projection 55 is provided on the tip end 25 of the hammer arm 5 and the elastic projection 55 is brought into contact with the projection 54 of the rotating body 53. However, the present invention is not limited to this. For example, as shown in FIG. 14, a projection 32 is provided at the rear end of the key 2, a leaf spring-like elastic projection 57 is provided on the projection 32, and the tip of the elastic projection 57 is a projection 54 of the rotating body 53. May be contacted from above and below. In this case, a support 51 is provided on the rear end portion 1b of the keyboard chassis 1, and a clutch member 52 is provided on the support 51.
The rotating body 53 may be attached via the. Even in this case, it goes without saying that the same operation and effect as in the third embodiment can be obtained.

In the third embodiment, the clutch member 52 and the rotating body 53 of the click feeling imparting member 50 are provided on the keyboard chassis 1 side, and the elastic projection 55 is provided on the hammer arm 5 side. For example, the rotating body 53 is attached to the tip end 25 of the lower end 5c of the hammer arm 5 via the clutch member 52, and the rear end 1b of the keyboard chassis 1 is attached.
Alternatively, a configuration may be employed in which an elastic projection is provided to abut on the projection 54 of the rotating body 53 from above and below. A rotating body 53 is attached to the projection 32 at the rear end of the key 2 via a clutch member 52, and an elastic projection is provided on the rear end 1b of the keyboard chassis 1 to abut on the projection 54 of the rotating body 53 from above and below. A configuration provided may be used. In any case, it goes without saying that the same operation and effect as in the third embodiment are obtained.

[0042]

As described above, according to the present invention, the click feeling imparting member imparts the key touch feeling of the acoustic piano coming out of the acoustic piano by the click feeling imparting member in the going stroke in which the key rotates downward when the key is pressed. In the return stroke in which the key rotates upward, the click feeling applied to the key can be reduced by the click feeling imparting member, whereby a key touch feeling similar to that of an acoustic piano can be obtained. Since the click feeling on the key is reduced in the return stroke, the return speed of the key and the hammer arm is faster than the conventional one, and the continuous hitting performance can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of a keyboard device of the present invention.

FIG. 2 is a cross-sectional view showing a main part of the keyboard device of FIG. 1 in a state where a key is pressed.

3A and 3B show a contact state between a projection of a rotating lever and a projection of a leaf spring in FIGS. 1 and 2; FIG. 3A is an enlarged view of a main part in a non-key pressed state of FIG. 1; FIG. 3 is an enlarged view of a main part in a key pressed state of FIG. 2.

FIG. 4 is a view showing characteristics of a key load with respect to a key stroke in the keyboard device of FIG. 1;

FIG. 5 is a diagram showing a modification of the first embodiment.

FIG. 6 is a sectional view showing a second embodiment of the keyboard device of the present invention.

FIG. 7 is an exemplary sectional view showing a main part of the keyboard device of FIG. 6 in a state where a key is pressed;

8A and 8B show operating states of the rotating body in FIGS. 6 and 7, wherein FIG. 8A is an enlarged view of a main part of the rotating body in a non-key pressed state of FIG. 6 and FIG. The principal part enlarged view of a moving body.

FIG. 9 is a view showing characteristics of a key load with respect to a key stroke of the keyboard device according to the second embodiment of FIG. 6;

FIG. 10 is a diagram showing a modification of the second embodiment.

FIG. 11 is a sectional view showing a third embodiment of the keyboard device of the present invention.

FIG. 12 is an exemplary sectional view showing a main part of the keyboard device of FIG. 11 in a state where a key is pressed;

FIG. 13 is a view showing characteristics of a key load with respect to a key stroke of the keyboard device according to the third embodiment of FIG. 11;

FIG. 14 is a diagram showing a modification of the third embodiment.

FIG. 15 is a sectional view showing a conventional keyboard device.

FIG. 16 is an enlarged sectional view showing the conventional click feeling imparting member of FIG.

17 is a diagram showing characteristics of a key load with respect to a key stroke in the conventional keyboard device of FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 keyboard chassis 2 key 3 key support portion 4 shaft 5 hammer arm 20, 35, 50 click feeling imparting member 22 rotating lever 24 leaf spring portion 25 tip end portion of hammer arm 26, 41 first contact portion 27, 42 second Abutment part 29 lever projection 30 regulating projection 32 projection 36 rotating body 37 regulating part 40, 55, 57 elastic projection 43 upper limit stopper for rotating body 44 lower limit stopper for rotating body 52 clutch member 53 rotating body 54 projection

Claims (5)

[Claims] 1. A keyboard chassis, a plurality of keys provided on the keyboard chassis so as to be vertically rotatable, and a plurality of keys provided corresponding to the plurality of keys to urge the keys upward, A hammer arm for rotating and displacing with the key pressing operation of the key to apply an action load to the key, and a click feeling imparting member for imparting a click feeling to each of the plurality of keys; The imparting member includes a rotating lever provided with a lever projection at a predetermined location and rotating vertically when a key is pressed, and a regulating member that the lever projection of the rotating lever comes into contact with and moves over. A first contact portion in which a part of the key or a part of the hammer arm abuts from below during a forward stroke in which the key rotates downward when the key is pressed, and a return stroke in which the key rotates upward. A part of the key or A keyboard having a second contact portion with which a part of the hammer arm contacts from above, wherein the first contact portion is separated from the second contact portion by a predetermined distance upward; apparatus. 2. A keyboard chassis, a plurality of keys rotatably provided on the keyboard chassis in a vertical direction, and a plurality of keys provided corresponding to the plurality of keys to urge the keys upward, respectively. A hammer arm for rotating and displacing with the key pressing operation of the key to apply an action load to the key, and a click feeling imparting member for imparting a click feeling to each of the plurality of keys; The applying member includes a rotating body provided with a projection on the outer peripheral surface and rotating vertically when a key is pressed, and a restricting portion that the projection of the rotating body comes into contact with and moves over, and these are the key or the hammer arm. A first contact portion that contacts from below a rotating body upper limit stopper provided on the keyboard chassis side during a forward stroke in which the key rotates downward when a key is pressed; Turns upward Keyboard apparatus characterized by the at return stroke rotating member for the lower limit stopper provided on the keyboard chassis side and a second contact portion which abuts from above. 3. A keyboard comprising: a keyboard chassis; a plurality of keys rotatably provided on the keyboard chassis in a vertical direction; and a click sensation imparting member for imparting a click sensation to each of the plurality of keys. The sensation imparting member is provided with a plurality of regulating protrusions on the outer peripheral surface, and a rotating body that rotates vertically when a key is pressed, and the rotating body is attached to the rotating body when the key is pressed, and the key rotates downward when the key is pressed. A clutch member that prevents rotation of the rotating body and makes the rotating body rotatable in a return stroke in which the key rotates upward, and one of a plurality of regulating protrusions of the rotating body when a key is pressed. A keyboard device comprising: an elastic projection that is in contact with the keyboard device. 4. The click feeling imparting member, wherein the rotating body and the clutch member are provided on the keyboard chassis,
4. The keyboard according to claim 3, wherein the elastic projection is provided on a hammer arm for applying an action load to the key by rotating and displacing the key or a key in response to a key pressing operation. apparatus. 5. A hammer arm for applying an action load to said key by said rotary member and said clutch member being pivotally displaced in accordance with a key pressing operation of said key. The keyboard device according to claim 3, wherein the elastic projection is provided on the keyboard chassis.