JP2567758Y2 - Electronic musical instrument 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 for an electronic musical instrument, especially an electronic piano.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 6, a jack b which moves and rotates by a force transmitted from a key a, and a hammer-like member which rotates by a force transmitted from a moving and rotating jack b. An electronic musical instrument provided with c is known.

[0003]

According to the above-mentioned conventional keyboard apparatus, a key touch feeling very similar to that of an acoustic piano can be obtained not only when the player strikes the key a strongly but also when the player strikes the key a weakly. There is a problem in that when the key a is returned due to key release, a sense of mass of the key cannot be obtained, and also when a key is repeatedly struck, the sense of mass of the key cannot be obtained.

According to the present invention, a sense of mass of the key can be obtained even when the key is returned due to key release, and the sense of mass of the key is not impaired even when striking repeatedly. It is an object of the present invention to provide a keyboard device for an electronic musical instrument that can be easily assembled and manufactured at low cost without impairing the key touch feeling even when it rebounds and vibrates.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a jack that moves and rotates by a force transmitted from a key and a jack that rotates and rotates by a force transmitted from a moving and rotating jack. In a keyboard device of an electronic musical instrument including a moving hammer-shaped member, the key is a return load applying unit that abuts when the hammer-shaped member rotated by the jack returns to the initial position and applies a return load to the key, The hammer-shaped member rotated by the key depression is provided with a catcher that abuts when returning to the initial position to reduce the impact of the hammer-shaped member, and the return load applying portion and the catcher are integrated.

[0006]

When the key is depressed, the jack is also moved downward, and the hammer-shaped member (hereinafter referred to as a hammer) is rotated by the downward movement of the jack. When the key is hit, the hammer has an inertia effect. Even when the key is hit lightly, the hammer exerts a force opposing the key press due to its own weight. When the key is depressed to some extent, the jack comes into contact with the fixing member and starts rotating, and at this time, the jack receives a drag from the fixing member,
The underperformed player must temporarily depress the key with a large force. When the key is further depressed, the jack is released from the hammer, and the force of the hammer's own weight is not transmitted to the key. For this reason, the player who has hit lightly feels weak at once. Then the key reaches the lower limit,
On the other hand, the hammer rotates to the rotation limit position by inertia and then starts to rotate in the opposite direction due to its own weight, and contacts the return load applying portion and the catcher of the key at the lower limit position. At this time, the contact force of the hammer is dispersed in the front-rear direction or the left-right direction of the key, so that the impact is reduced and the touch feeling of the key is not impaired. Since the load due to the weight of the hammer is always applied to the key via the return load applying unit as a return load when the key is returned, the key can be pressed without losing the feeling of mass even in repeated tapping during the return.

The key returns to the initial position by the application of the return load of the spring and the hammer, the hammer returns to the rotation restricting position, and the jack returns to the initial position by the force of the elastic member to prepare for the next key press.

[0008] Since the return load applying portion and the catcher of the key are integrated, the mold structure is simpler than when these are separately provided, so that the mold is inexpensive and the key can be manufactured at low cost. Yes, and easy to assemble.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
1 to 4 show an embodiment of the present invention. In the figure, reference numeral 1 denotes a synthetic resin key (white key) rotatably supported by a keyboard frame 2 at a base end thereof, which is formed in a substantially box shape and has an open lower surface. An upper limit stopper 3 projects downward from at least one front end of the key 1 and is integrally formed. An actuator 4 is provided on the inner upper wall of the key 1. The upper limit stopper 3 also functions as a return load applying portion and a catcher. A switch 5 and a fulcrum member 6 which are operated by being pressed by the actuator 4 are fixed to the keyboard frame 2, and a fulcrum 7 of the fulcrum member 6 rotatably supports a hammer 9 having a weight 8 attached to one end. Have been. A jack 10 having a thickness substantially equal to the width between both side walls is rotatably supported in the internal space of the key 1, and one end of the jack 10 is locked in a concave portion 11 formed above the fulcrum member 6. The other end of the strip-shaped leaf spring 12 is urged in the counterclockwise direction in the figure so that the hammer contact portion 14 protruding downward from the slit 13 of the keyboard frame 2 contacts the jack contact portion 15 of the hammer 9. Has become.

To explain the operation of this embodiment, when the key 1 is depressed, the key 1 starts rotating counterclockwise, and the jack 10 moves downward accordingly. As the jack 10 moves, the hammer contact portion 14 presses the jack contact portion 15, and the hammer 9 starts rotating counterclockwise. At this time, the player receives the load of the hammer 9. When the key 1 is further depressed, the protrusion 16 of the jack 10 comes into contact with the keyboard frame 2 as shown in FIG. 2, and the jack 10 starts rotating. At this time, the player receives the drag from the keyboard frame 2 and the load of the leaf spring 12 provided on the jack 10.
When the key 1 is further depressed, the jack 10 is disengaged from the hammer 9 as shown in FIG. However, since the hammer 9 continues to rotate due to inertia, the weight of the hammer 9 is
At this time, the performer feels like a momentary escape. Thereafter, the key 1 contacts the key lower limit stopper felt 17, and the rotation of the key 1 ends.

After the hammer 9 contacts the hammer upper limit stopper felt 18 provided on the keyboard frame 2, it starts to rotate clockwise by its own weight, and as shown in FIG. 4, the hammer 9 on which the felt 19 is adhered. The front end inclined part 20 is the key 1
Abuts against the return load applying portion formed below the rear portion of the upper limit stopper 3 and the inclined portion 21 acting as a catcher, and the rotation return of the hammer 9 is prevented. This abutment suppresses the rebound vibration of the hammer 9, and the abutting force is transmitted to the player through the key 1, so that the hammer 9 feels as a return of the hammer after the key is hit on a normal acoustic piano.

At the time of key release, the key 1 is rotated to its initial position by the hammer 9 which rotates clockwise by its own weight via its inclined portion 21, and the jack 10
The hammer contact portion 14 immediately returns to the jack contact portion 15 of the hammer 9 and the upper portion of the jack 10 contacts the inner upper wall of the key 1. As shown in FIG. 3 returns to the initial position where it contacts the key upper limit stopper felt 22. The hammer 9 also contacts the hammer lower limit stopper felt 23 and finishes its rotation.

At the time of key release, the key 1 returns in a state where the load of the hammer 9 is constantly applied to the upper limit stopper 3 via the inclined portion 21, so that the finger in contact with the key 1 is given a sense of mass. . Therefore, the sense of mass is given to the key depressed again during the return of the key 1, and the sense of mass is not impaired even in repeated hits.

FIG. 5 shows another embodiment of the present invention. In this embodiment, the key 1 is supported on a fulcrum member 25 provided on the keyboard frame 2 at an intermediate portion thereof and is swingable, and a jack 10 is provided at an upper portion behind the fulcrum.
a is rotatably supported on a shaft 26, and a return load applying portion / catcher 27 is fixed thereto. This jack 10a
A hammer 9 whose one end is rotatably supported by a member 28 erected on the keyboard frame 2 is provided above the return load applying portion and catcher 27, and above the protrusion 16a of the jack 10a. Is provided with a stopper 29 having one end fixed to the member 28. The jack 10
a is biased leftward in the figure by a tension spring 30 having one end locked to the return load applying portion / catcher 27, and stops at a position where its lower end is locked to the side wall of the concave portion 31 of the key 1,
The bifurcated tip fits into the hammer 9 and comes into contact with it. Return load applying part and catcher 27
Has a sloping portion 32 on the side of the tip end thereof, and the sloping portion 32 acts as the catcher. When the key is released, it comes into contact with the hammer 9 to apply a return load to the key 1. Then, the finger touching the key 1 is given a sense of mass.

In the figure, a hammer 9 has a weight 8 and a support portion 33 provided with a hammer upper limit stopper felt 18 and a hammer lower limit stopper felt 23 for regulating the upper and lower positions of the hammer 9 at upper and lower positions. Have been.

[0016]

According to the present invention, as described above, the key has the return load applying portion and the catcher integrally, so that the key can be given a sense of mass even when the key is returned upon key release, and the key can be held even when the key is repeatedly struck. The feeling of mass is not impaired, and the impact is reduced when the hammer rotated by keying touches the key, so that the key touch feeling is not impaired, and it is easy to assemble and inexpensive to manufacture. It has the effect of being able to.

[Brief description of the drawings]

FIG. 1 is a cutaway side view of an embodiment of the present invention in a key released state.

FIG. 2 is a cut-away side view of the above-described embodiment in which the jack has started to rotate after a key is pressed;

FIG. 3 is a cut-away side view of the above-described embodiment in which the jack is released from the hammer after the key is pressed.

FIG. 4 is a cutaway side view of the above embodiment immediately after key release.

FIG. 5 is a cutaway side view of another embodiment of the present invention in a key released state.

FIG. 6 is a cutaway side view of a keyboard device of a conventional electronic musical instrument.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Key 3 Key upper limit stopper 9 Hammer 10 Jack 21 Inclined portion (return load applying portion, catcher) 21a Return load applying portion and catcher 31 Inclined portion

Claims (1)

(57) [Scope of request for utility model registration] 1. A keyboard device for an electronic musical instrument, comprising: a jack that moves and rotates by a force transmitted from a key; and a hammer-shaped member that rotates by a force transmitted from the moving and rotating jack. When the hammer-shaped member rotated by the jack returns to the initial position, the return-load applying portion abuts on the key to apply a return load to the key, and when the hammer-shaped member rotated by the key press returns to the initial position. Equipped with a catcher that abuts to reduce the impact of the hammer-like member,
The keyboard device for an electronic musical instrument, wherein the return load applying unit and the catcher are integrated.