JP3234512B2 - Keyboard device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard device provided with an action mechanism comprising a wippen, jack, hammer or the like or a pseudo action mechanism.

[0002]

2. Description of the Related Art Conventionally, as a keyboard device of an electronic musical instrument, a device in which a hammer is provided on a wooden keyboard and a device in which a hammer is provided on a plastic keyboard are known. In these devices, the keyboard directly swings the hammer. Therefore, there is a problem that the let-off effect cannot be obtained and the touch feeling of the acoustic piano cannot be realized.

In order to realize the touch feeling of an acoustic piano, a keyboard device 601 for an electronic musical instrument provided with a pseudo action mechanism has been developed as shown in FIG. In this keyboard device 601, when the keyboard 614 swings counterclockwise in the figure around the key fulcrum 615 by depressing a key, the whippen 630 is accordingly moved clockwise about a wippen swing shaft 631 provided on the center rail 660. Swinging around, the jack 644 becomes the bat 650 of the hammer 650
Push up a. Then, the hammer 650 starts swinging from the initial position in contact with the hammer pillow 668, and the hammer swing shaft 651 provided on the center rail 660.
Swings clockwise around. Then, after the jack tail 647 abuts on the regulating felt 666, the jack 644 rapidly swings counterclockwise and comes out of the bat 650a, so that the hammer 650 starts inertial movement. This timing is let-off.

[0004] The hammer 650 collides with a hammer stopper 663 provided on the hammer stop rail 662 (indicated by a two-dot chain line in the figure), and thereafter swings back. At this time, if the key is kept depressed, the catcher 654 is supported by the back check 643 at the back stop position (indicated by a dotted line in FIG. 8), and if the key is released, the hammer pillow 6
It is supported in a rest position by 68.

A button type sensor 637 is provided below the keyboard 614. The sensor 637 includes two switches therein. When the keyboard 614 is pressed, one switch is pressed to generate an ON signal, and then when the keyboard 614 is further pressed, the other switch is pressed to generate an ON signal. It is. Then, based on the signals of the two switches of the sensor 637, the control device 605 determines the string striking information to generate a string striking sound, or determines the sound stopping information to stop the sound.

[0006]

By the way, the keyboard device 6
In FIG. 01, a hammer skin HS is affixed to the butt portion 650a of the hammer 650 to reduce the impact with the jack 644, suppress the generation of a collision sound, and further facilitate sliding.
A catcher skin CS is attached to alleviate the impact when received by 43 and suppress the generation of a collision sound.

However, since the hammer skin HS and the catcher skin CS are separate members, it is necessary to cut the cushioning material and affix them individually. For this reason, there was a problem that the processing fee was high and the cost increased as a result. SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and has as its object to provide a keyboard device capable of preventing the occurrence of a collision sound in an action mechanism or a pseudo action mechanism at low cost.

[0008]

Means for Solving the Problems and Effects of the Invention In order to solve the above-mentioned problems, the present invention provides a whippen that swings with a swing of a keyboard, and is swingably supported by the whippen,
A jack that swings and moves in accordance with the swing of the wippen, and whose movement is regulated during the movement, and a swing is started by the swing and movement of the jack, whereby the jack is regulated. And a hammer that performs inertial movement away from the jack and reaches a striking (or pseudo-stringing) position, and a back check that can catch the hammer that has swung back after reaching the striking (or pseudo-stringing) position. Key device for regulating the initial position of the hammer.
A hammer pillow, wherein the hammer has a butt portion to which the jack can abut, a catcher portion caught by the back check , and an abutment with the hammer pillow.
And a shock absorbing member that covers the rest, the butt, and the catcher in a continuous manner.

Such a keyboard device is a keyboard instrument having an action mechanism composed of a whippen, a jack, and a hammer for actually striking a string. The present invention can be applied to an electronic musical instrument provided with a pseudo action mechanism for matching. Here, the pseudo action mechanism is
For example, it refers to a mechanism provided with a hammer stopper for preventing movement of a hammer in place of a string among action mechanisms.

In such a keyboard device, when the keyboard swings due to key depression, the wippen swings accordingly, and the jack swingably supported by the whippen moves upward with the swing of the wippen. Rocks while swinging. The jack swings while moving upward so as to push up the hammer, so that the hammer starts swinging. The operation of the jack is regulated so as to be separated from the hammer during the operation. For this reason, the hammer performs inertial motion independently of the jack. This timing is the let-off timing. Thereafter, the hammer reaches a striking (or pseudo-stringing) position while performing inertial motion. The string striking position refers to the position of the hammer when the string is actually struck, and the pseudo string striking position refers to, for example, the position of the hammer when it strikes a hammer stopper provided in place of the string.
The hammer that has returned after reaching the striking (or pseudo-string) position is caught by a back check if the key is being pressed, and returns to the initial position if the key is released.

Here, the keyboard device of the present invention is provided with a shock absorbing member that covers the rest, the bat, and the catcher provided on the hammer in succession. With this shock absorbing member, the butt portion of the jack and hammer, or
When the back check and the catcher portion of the hammer shift from the non-contact state to the contact state, the generation of an impact sound is prevented. Also, if the rest and the hammer pillow collided
Impact noise is reduced.

[0012] Therefore shock absorbing member is formed so as to cover the rest portion and the butt portion and the catcher in a series, as compared with the case of covering the rest portion and the butt portion and the catcher separately cut processed There is no need to attach them individually or separately, and as a result, the processing fee is reduced accordingly. Therefore, according to the keyboard device of the present invention, it is possible to achieve an effect that the occurrence of collision noise in the action mechanism or the pseudo action mechanism can be realized at low cost.

[0013]

[0014] Also, in this case, considering the workability when providing the shock absorbing member in a series, if example embodiment, it is preferable to mold the hammer as a form including the butt and the catcher portion and rest portion.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. Note that the embodiment of the present invention
It is needless to say that the present invention is not limited to the following embodiments, and can take various forms within the technical scope of the present invention.

[First Embodiment] FIG. 1 is a sectional view of the keyboard device of the first embodiment in a key released state, FIG. 2 is a sectional view of the keyboard device in a pseudo string striking state, and FIG. FIG. 2 is a partially enlarged view of FIG. 1 to 3 illustrate the case of the white key, the black key is the same as the white key except that the keyboard structure is different.

The keyboard device 1 is used for an electronic keyboard instrument, and mainly includes a chassis 11, ribs 19, and a keyboard 1.
4, wippen 30, center rail 60, hammer 5
0 and so on. The chassis 11 includes a flat portion 12 located at a position higher than the upper surface of the shelf 2 and legs 13 fixed as separate components to the front end of the flat portion 12. The plane portion 12 is arranged in the direction in which the keyboard 14 is arranged (the direction perpendicular to the plane of FIG.
In the left-right direction, the same applies hereinafter). A bearing 16 for supporting the key fulcrum 15 is provided on the rear end side of the flat portion 12.
Has been fixed.

The bearing 16 has substantially L-shaped L-shaped legs 18 on its lower surface.
After the bearing 18 is inserted through the holes 17, 17, the bearing 16 is slid in the front direction of the keyboard (to the left in FIGS. 1 and 2) so that a flat surface is formed between the L-shaped leg 18 and the lower surface of the bearing 16. In this state, the front end of a flange portion 61 of a center rail 60 described later abuts on the rear end of one L-shaped leg 18 (rear side, that is, the right L-shaped leg 18 in FIG. 1). In this state, the bearing 16 is fixed to the flat portion 12 of the chassis 11 so as not to slide. The bearing 16 is mounted on the chassis 11 in a state of being accurately positioned.

An opening 25 through which the front end of the wippen 30 is inserted up and down is provided in the flat portion 12 for each keyboard. Further, the rear end of the flat portion 12 is a free end having a shape slightly bent upward.
An open space 39 is provided between the rear end 2 and the shelf 2.

The legs 13 of the chassis 11 are substantially U-shaped members extending in the direction in which the keyboards 14 are arranged. The legs 13 are screwed to the plane portion 12 at the upper flange portion 13a and are screwed to the lower flange portion 13b. It is screwed to the shelf 2. Therefore, the height of the front end of the flat portion 12 is regulated by the legs 13.

The rib 19 is a plate-like member extending in the front-rear direction of the keyboard 14. The rib 19 is screwed to the leg portion 13 of the chassis 11 at a front flange portion 20, and is connected to the flat portion 12 of the chassis 11 at three places. Upper flange portions 21a, 21 provided
b, 21c, and is screwed to the shelf 2 at the lower flange portion 22.

The height of the rear end of the flat portion 12 (ie, the vicinity of the key fulcrum 15) is regulated by an upper flange portion 21c of the rib 19 and a lower flange portion 22 provided at a position facing the upper flange portion 21c. ing. The ribs 19 are formed by pressing a metal plate material with a die by pressing, and are also bent in the die to form the flange portions 20 to 22. For this reason, the cost of manufacturing the rib 19 can be kept low, and the accuracy of the rib 19 depends on the accuracy of the mold, but since the size of the mold is small, high accuracy can be obtained. That is, the height of the rear end of the flat portion 12 is regulated with sufficient accuracy.

The keyboard 14 (here, a white key) is formed of a synthetic resin in a hollow shape in which ribs for reinforcement are arranged in some places, and is attached to a key fulcrum 15 at its rear end so as to be swingable.
Therefore, the front end of the keyboard 14 can swing up and down about the key fulcrum 15. At the front end of the keyboard 14, a hook-like arm 24 projects downward. The hook-shaped arm 24 has a shape in which the hook portion 24 a is bent toward the key fulcrum 15.

When the keyboard 14 is not depressed, as shown in FIG. 1, the hook portion 24a of the hook-shaped arm 24 is a long felt 2 provided on the lower surface of the front end of the flat portion 12 of the chassis 11.
6b. When the keyboard 14 is depressed, as shown in FIG. 2, the lower surface of the front end of the keyboard 14 has a long felt 26 provided on the upper surface of the front end of the flat portion 12 of the chassis 11.
a. Further, a keyboard guide portion 27 formed upward at the front end of the plane portion of the chassis 11 is inserted into a hollow portion on the front end side of the keyboard 14, and the keyboard guide portion 27 of the keyboard 14 at the time of a key pressing operation. It serves to guide the front end so that it does not swing right and left.

Below the keyboard 14, a whippen swing shaft 31 of a whippen 30 is swingably supported by a substantially U-shaped bearing member 33. The bearing member 33 is provided with a bearing member fixing plate 34 so as to cover the wippen swing shaft 31 from above, and the bearing member fixing plate 34 and the bearing member 33 are cantilevered to the chassis 11 by the same screws. ing. The whippen swing shaft 31 is prevented from coming off the bearing member 33 by the bearing member fixing plate 34.
The bearing member 33 is mounted on the chassis 11 in a state where it is accurately positioned.

The front end of the wippen 30 is movable through the opening 25 of the chassis 11 between above and below the chassis 11 when the wippen 30 swings around the whippen swing shaft 31. Are located. On the upper surface of the front end of the wippen 30, a sliding tape 32 having a small surface frictional resistance is provided.
The rear end of the keyboard 14 is in contact with the tip of an actuator 35 provided to protrude.

Below the front end of the wippen 30, a board 28 extending in the direction in which the keyboards are arranged is provided with a flat portion 12 of the chassis 11.
And is attached to the chassis 11 at a predetermined interval. On this board 28, each wippen 30 of a total of 88 keys is provided.
A key press detection sensor 37 is provided at a position corresponding to. The key press detection sensor 37 has two switches disposed therein. When the keyboard 14 is pressed down and the front end of the wippen 30 is pressed down by the actuator 35, one switch is turned on first, and the keyboard 14 is further pressed down. And the other switch turns on. The key depression timing and velocity can be obtained from the on / off timing of the two switches and the difference between the timings. The key detection sensor 37 is accurately positioned on the substrate 28 in consideration of the positional relationship with the keyboard 14.

The rear end of the wippen 30 is connected to an open space 39 between the rear end of the flat portion 12 of the chassis 11 and the shelf 2.
Through the rear end of the flat portion 12 of the chassis 11. At the rear end of the wippen 30, a balance weight 41 is provided, and a bearing 42 for supporting the jack rotating shaft 45 and a back check 43 for receiving the hammer 50 swinging back are integrally provided with high precision. Have been. The jack 44 is substantially L-shaped,
The jack rotation shaft 45 is provided at an L-shaped bent portion. The jack tail 47 is connected to the wippen 30 by a compression coil spring 46.

The center rail 60 is formed so as to extend in the direction in which the keyboards are arranged, and has a standing portion 62 that rises substantially perpendicularly to the plane portion 12 of the chassis 11, and extends from below the standing portion 62 toward the front of the keyboard 14. And a stop rail portion 63 extending obliquely upward and rearward from above the standing portion 62. The center rail 60 is screwed to the flange portion 61 while being accurately positioned on the flat portion 12 of the chassis 11. In addition, this center rail 6
The front end of the flange portion 61 is fixed in contact with the L-shaped leg 18 so that the L-shaped leg 18 on the rear side of the bearing 16 supporting the key fulcrum 15 does not slide in the hole 17. ing.

At the standing portion 62 of the center rail 60,
A rail 67 having a substantially 断面 -shaped cross section extending in the direction in which the keyboards are arranged is screwed, and has a hammer 50 on its upper surface in a key released state.
A hammer pillow 68 that is in contact with the rest 52 of the
The lower surface is provided with a regulating felt 66 to which the jack tail 47 can abut. A stop felt 63a is provided on the lower surface of the stop rail 63 so as to extend in the direction in which the keyboards are arranged. As described above, since both the hammer pillow 68 and the regulating felt 66 are provided on the rail 67, the cost is reduced as compared with the case where each is provided on a separate rail. In addition, this rail 6
7. The regulating felt 66 and the hammer pillow 68 are all accurately positioned.

Further, the center rail 60 is provided with an action rib 70 for reinforcement. The action rib 70 is screwed at a standing portion 62 of the center rail 60 and two places, and at a flange portion 61 of the center rail 60 and one place.

The hammer 50 has a hammer swing shaft 51 provided at the front end thereof, which is swingably supported by a substantially U-shaped bearing member 65 fitted in a square hole of a standing portion 62 of the center rail 60. The bearing member 65 is provided with a bearing member fixing plate 71 so as to cover the hammer swing shaft 51. The bearing member fixing plate 71 and the bearing member 65 are cantilevered to the center rail 60 by the same screw. I have.
The bearing member fixing plate 71 prevents the hammer swing shaft 51 from coming off the bearing member 65. The bearing member 65 is attached to the center rail 60 in a state where it is accurately positioned.

The lower surface of the hammer 50 has a rest portion 52 which can be brought into contact with the hammer pillow 68 and a butt portion 53 which is formed in a substantially S-shape so that the tip of the jack 44 comes into contact with and separates therefrom.
And a catcher 54 that can abut the back check 43 of the wippen 30. This hammer 50
Is Ah at rest portion 52, the butt portion 53, a synthetic resin molded article which is molded to a form including a catcher 54
You . The hammer 50 includes two layers of urethane foam for cushioning shock and artificial leather for easy sliding (the latter is a surface layer) from the rest part 52 to the catcher part 54 via the bat part 53. The cushion material 56 (the shock absorbing member of the present invention) is continuously attached. In a position where the tip of the jack 44 abuts on the cushion material 56 when the key is not pressed, the jack 44 tries to return to the original position by the action of the compression coil spring 46 after the key is released. Cushioning material 57 for suppressing the collision sound when contacting the material 56
Is affixed.

Of the upper surface of the hammer 50, the hammer 50
When the rocker swings counterclockwise in FIG. 1 about the hammer swing shaft 51, the collision sound generated when the hammer 50 collides with the stop felt 63 a is provided at the position where the collision collides with the stop felt 63 a provided on the center rail 60. A pseudo string striking portion 58 to which a cushioning material for suppressing the vibration is applied is provided.

At the rear end of the hammer 50, the weight 5 is taken into consideration in consideration of the center of gravity of the hammer in the action mechanism of the acoustic piano, the operation when the hammer swings back, and the like.
9 are provided. Whippen 30, Jack 4
4. The hammers 50 are all made of synthetic resin, and do not cause distortion for a long period of time.

In the keyboard device 1 constructed as described above, in the state where the key is not pressed, as shown in FIG. 1, the clockwise force moment is applied to the front end of the wippen 30 by the weight 41 of the wippen 30 or the like. The keyboard 14 attempts to swing clockwise because it is acting on the actuator 35, but the swing is prevented because the hook 24a of the hook arm 24 abuts on the long felt 26b. Stopped in a state.

When the player depresses the keyboard 14, the keyboard 1
4 swings counterclockwise in FIG. 1 around the key fulcrum 15. As a result, the front end of the wippen 30 is pushed down by the actuator 35, so that the wippen 3
Numeral 0 swings counterclockwise around the wippen swing shaft 31, the lower surface of the front end pushes down the key press detection sensor 37, and the rear end swings upward. Then, the jack 44 moves the butt 53 of the hammer 50 with the swing of the wippen 30.
And swings counterclockwise with respect to the wippen 30. Thereafter, when the jack tail 47 of the jack 44 hits the regulating felt 66, the jack 44 rapidly swings counterclockwise around the contact point between the jack tail 47 and the regulating felt 66, and the tip of the jack 44 is a hammer 50. From the butt portion 53 of the horn. The operation in which the tip of the jack 44 comes out of the butt portion 53 is let-off. Therefore, this pseudo action can cause a let-off like a normal action. At this time, Jack 4
4 is in contact with the bat 53 via the cushion material 56, so that no noise is generated and the slide 4 is easy to slide.

After let-off, the hammer 50 continues to swing counterclockwise due to inertial motion. Thereafter, the pseudo string striking portion 58 of the hammer 50 performing the inertial motion collides with the stop felt 63a. The state at this time is shown in FIG. As a result, the hammer 50 is prevented from inertial movement.
Thereafter, the hammer 50 swings back in the opposite direction, ie, clockwise.

When the hammer 50 swings back, the keyboard 14
If the player's finger is away from the, the rest 52 of the hammer 50 abuts on the hammer pillow 68 and stops at that state, that is, in the initial position (see FIG. 1). At this time, since the rest portion 52 is covered with the cushion material 56, no collision sound is generated even if the rest portion 52 collides with the hammer pillow 68. On the other hand, if the keyboard 14 is kept depressed when the hammer 50 swings back, the catcher portion 54 of the hammer 50 is provided at the rear end of the wippen 30 before the rest portion 52 of the hammer 50 contacts the hammer pillow 68. It is received at the back stop position (see the dotted line in FIG. 2) by the back check 43.
At this time, since the catcher portion 54 is covered with the cushion material 56, no collision sound is generated even if the catcher portion 54 collides with the back check 43.

As described above, the function of the pseudo action of this embodiment has the same function as that of an acoustic piano except that the hammer 50 does not hit a string.
For this reason, the touch feeling that the player receives from the keyboard 14 is almost the same as that of an acoustic piano.

When a key is depressed, the lower surface of the front end of the wippen 30 contacts the key depression detection sensor 37, and the key depression detection sensor 3
Since the two switches inside 7 are turned on / off,
The key press timing and its velocity can be detected, and based on this detection, the electronic tone generator controls the electronic tone generator at the timing corresponding to the key press at the timing corresponding to the key press and the strength corresponding to the velocity according to the control of an electronic control circuit (not shown). Can output the performance sound.

According to the keyboard device 1 of this embodiment described in detail above, the following effects can be obtained. The cushion material 56 covers the rest portion 52, the butt portion 53, and the catcher portion 54 provided on the hammer 50 in a continuous manner. For this reason, compared to the case of covering each individually,
There is no need to cut or paste individually, and as a result, the processing fee is reduced accordingly. That is, according to the present embodiment, the effect of preventing the generation of the collision sound in the pseudo action mechanism can be realized at low cost.

The hammer 50 has a rest portion 52 and a butt portion.
53, molded to include a catcher portion 54.
Because it is, the cushion member 56 is good workability when providing the bout. In the above embodiment, since the hammer pillow 68 itself has a function to reduce the impact, the cushion material 5
6 need not necessarily cover the rest 52 of the hammer 50. However, since the rest portion 52 of the hammer 50 is formed in a flat surface and the butt portion 53 and the catcher portion 54 are formed in a curved surface, as a work procedure for attaching the cushion material 56, first, the rest portion 52 formed in a flat surface is used. It is preferable that one end of the cushion material 56 is aligned and then pasted, and then the butt portion 53 and the catcher portion 54 are pasted because the cushion material 56 can be favorably adhered without shifting.

[Second Embodiment] FIG. 4 is a cross-sectional view of a keyboard apparatus according to a second embodiment, in which a solid line in an action indicates a key release state, and a dashed line indicates a string striking state. Since the second embodiment is not an electronic keyboard instrument keyboard device but an acoustic stick keyboard device, the second embodiment does not include the key press detection sensor 37 and the stop rail portion 63 as in the first embodiment. Is different from the first embodiment in that a string striking section 258 for actually striking a string is provided instead of the pseudo string striking section 58, but other configurations are substantially the same as the first embodiment. For this reason, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In this keyboard device, the operation of each action (wippen 30, jack 44) from when the player presses down the keyboard 14 to when the hammer 250 rotates is the first.
This is the same as the embodiment. However, hammer 2 after let-off
50 actually strikes the string with the hammer felt of the string striking section 258. The action of each action when the hammer 250 swings back is the same as in the first embodiment.

This embodiment is similar to the first embodiment in that the hammer 2
50 is a rest part 52, a butt part 53, a catcher part 54
And the cushion material 56 is continuously provided so as to cover them.
The same effect as that of the embodiment can be obtained.

[Third Embodiment] FIG. 5 is a cross-sectional view of a keyboard device according to a third embodiment (solid lines indicate a key released state, and dashed lines indicate a pseudo string striking state). It is the elements on larger scale of FIG. 5 and 6 illustrate the case of the white key, the black key is the same as the white key except that the keyboard structure is different.

In the keyboard device of this embodiment, the chassis is composed of three members, a chassis front member 111, a chassis middle member 112, and a chassis rear member 113.
1 to 113 are respectively supported at predetermined heights by ribs 119 provided on the upper surface of the shelf 2. The rib 119 is formed in a shape extending in the front-back direction of the keyboard (the left-right direction in FIG. 5, the same applies hereinafter). The chassis front member 111 is provided with a cushion 124 which can be brought into contact with the lower surface of the front end of the wooden keyboard 114, and a keyboard guide 127 which is inserted into a hollow portion on the front end side of the keyboard 114. A balance pin 115 of a keyboard 114 is erected on the middle member 112 of the chassis, and the keyboard 114 can swing about the balance pin 115. The keyboard 1 is attached to the rear member 113 of the chassis.
A cushion 126 is provided which can abut on the lower rear surface of the rear end 14.

At the rear end of the rib 119 is screwed a vertical rail 116 which is substantially perpendicular to the shelf board 2 and extends in the direction in which the keyboards are arranged (the direction perpendicular to the plane of FIG. 5; the same applies hereinafter). A center rail 160 is connected and fixed to the vertical rail 116 via a connecting rib 117 by a screw.

The vertical rail 116 has a wippen 130
The wippen swing shaft 131 is swingably supported by a substantially U-shaped bearing member 133 fitted in a square hole provided in the vertical rail 116. The bearing member 133 has a bearing member fixing plate 134 so as to cover the wippen swing shaft 131.
The bearing member fixing plate 134 and the bearing member 1
33 is screwed to the vertical rail 116 in a cantilever manner by the same screw. The bearing member fixing plate 134 prevents the whippen swing shaft 131 from coming off the bearing member 133. Note that the bearing member 133 is a vertical rail 1
16 is mounted in a state where it is accurately positioned. Also, on the lower surface of the rear end of the wippen 130, the keyboard 11
4 two capstan buttons 13 contacting the upper surface of the rear end
2 are provided.

Behind the keyboard 114, a vertical rail 116 is provided.
The substrate 128 is disposed so as to be substantially parallel to the above. A key press detection sensor 137 is provided on the substrate 128 at a position corresponding to the pressing portion 135 of the wippen 130.
The key press detection sensor 137 has substantially the same function as the key press detection sensor 37 of the first embodiment, and is accurately positioned on the substrate 128 in consideration of the positional relationship with the keyboard 114 and the wippen 130. I have.

At the front end of the wippen 130, a weight 141 for balance is provided, and a jack rotating shaft 45 of the jack 44 (the same as in the first embodiment) is supported. A back check 143 for receiving (the same as in the first embodiment) is provided integrally with high accuracy. The jack tail 47 of the jack 44 is connected to the wippen 130 by a compression coil spring 46 (see FIG. 5) as in the first embodiment.

The center rail 160 fixed to the connecting rib 117 is formed so as to extend substantially perpendicular to the shelf board 2 and in the direction in which the keyboards are arranged. This center rail 16
0 has a stop rail portion 163 extending diagonally upward and forward from above, and a stop felt 163 on its lower surface.
a is provided.

As shown in FIG. 6, the center rail 160
A rail 67 having a substantially Γ cross section similar to that of the first embodiment is screwed below the hammer swing shaft 51. The rail 67 has a hammer pillow 68 on the upper surface and a regulating felt 66 on the lower surface, as in the first embodiment. Further, the hammer 50 has the same configuration as that of the first embodiment, and the hammer swing shaft 51 is swingably supported by the center rail 160 as in the first embodiment. still,
The same reference numerals as in the first embodiment denote the respective components of the hammer 50, and a description thereof will be omitted.

In the keyboard device of this embodiment constructed as described above, when the key is not depressed, as shown in FIG. 5, the front end of the wippen 130 is counterclockwise in FIG. Since the moment of the peripheral force acts on the rear end of the keyboard 114, the front end of the keyboard 114 tries to swing upward, but the lower end of the rear end of the keyboard 114 comes into contact with the cushion 126. Stopped in a state where swing was prevented.

When the player depresses the keyboard 114, the keyboard 114 swings counterclockwise in FIG. 5 around a balance pin 115 provided substantially at the center of the keyboard 114. As a result, the wippen 130 is moved to the capstan button 13.
2 and swings clockwise around the wippen swing shaft 131, the pressing portion 135 pushes down the key press detection sensor 137, and the front end of the wippen 130 swings upward. Then, the jack 44 swings clockwise with respect to the wippen 130 while rising so as to push up the butt portion 53 of the hammer 50 with the swing of the whippen 130. Subsequent operations are the same as in the first embodiment (however, the directions of rotation of the jack and the hammer in FIG. 5 are opposite to those in FIGS. 1 and 2 showing the first embodiment).
The description is omitted.

According to the third embodiment, since the same hammer 50 as that of the first embodiment is provided, the same effect as that of the first embodiment can be obtained. [Fourth Embodiment] FIG. 7 is a partial cross-sectional view of a keyboard device according to a fourth embodiment.
The dashed line indicates the striking state. The fourth embodiment is not a keyboard device for an electronic keyboard instrument but a keyboard device for an acoustic piano, and therefore, the key press detection sensor 137 as in the third embodiment.
The third embodiment is different from the third embodiment in that a hammer 250 (similar to that of the second embodiment) and a hammer 250 (same as in the second embodiment) have a striking portion 258 for actually striking a string. The other configuration is substantially the same as that of the third embodiment. Therefore, the same components as those of the third embodiment are denoted by the same reference numerals, and the description thereof is omitted. Although FIG. 7 is a partial cross-sectional view, the keyboard, chassis, ribs, and the like are not shown, but their configurations are the same as in the third embodiment.

In the keyboard device of the fourth embodiment, each action (whippen 130, jack 44) from when the player presses down the keyboard 114 until the hammer 250 rotates.
Is similar to that of the third embodiment. However, the hammer 250 after let-off actually strikes the string with the hammer felt of the string striking portion 258. The action of each action when the hammer 250 swings back is also the same as in the third embodiment.
According to this embodiment, the same hammer 250 as in the second embodiment is used.
Therefore, the effect of the first embodiment can be obtained as in the second embodiment.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view when a keyboard device of a first embodiment is in a key release state.

FIG. 2 is a cross-sectional view when the keyboard device of the first embodiment is in a pseudo string striking state.

FIG. 3 is a partially enlarged view of FIG. 1;

FIG. 4 is a sectional view of a keyboard device of a second embodiment.

FIG. 5 is a sectional view of a keyboard device of a third embodiment.

6 is a partially enlarged view of FIG.

FIG. 7 is a partial sectional view of a keyboard device according to a fourth embodiment.

FIG. 8 is a sectional view of a conventional keyboard device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Keyboard device, 2 ... Shelf board, 8 ... Screw, 9
..Screw holes, 11: chassis, 14: keyboard, 1
5 ... key fulcrum, 16 ... bearing, 17 ... hole, 18
... L-shaped leg, 19 ... Rib, 24 ... Hook-shaped arm, 28 ... Substrate, 30 ... Whippen, 31 ...
.Wippen swing shaft, 35 ... actuator, 37
... Key press detection sensor, 44 ... Jack, 45 ...
· Jack rotation axis, 47 · · · Jack tail, 50 ·
..Hammers, 51 ... Hammer swing shafts, 52 ...
Rest part, 53 ... Bat part, 54 ... Catcher part, 56 ... Cushion part, 58 ... Pseudo string part,
Reference numeral 60: center rail, 63: stop rail portion, 63a: stop felt, 65: bearing member, 66: regulating felt, 67: rail, 68: hammer pillow.

Claims (2)

(57) [Claims] 1. A whippen that swings with a swing of a keyboard, and is swingably supported by the whippen, swings and moves with the swing of the whippen, and the movement is restricted during the movement. A jack and a hammer that starts swinging by swinging and moving the jack, and when the operation of the jack is regulated, the jack separates from the jack to perform an inertial motion and reaches a striking (or pseudo striking) position. A keyboard device comprising: a back check capable of catching a hammer that has swung back after reaching a hammering (or pseudo hammering) position, comprising a hammer pillow for regulating an initial position of the hammer.
The hammer includes a butt portion to which the jack can contact, a catcher portion to be caught by the back check, and a rest portion to contact the hammer pillow, and wherein the rest portion, the butt portion, and the catcher A keyboard device provided with an impact-absorbing member that covers the part in succession. Wherein said hammer, a keyboard apparatus according to claim 1, characterized in that it is molded in the form containing the said butt portion and the catcher and the rest portion.