JP2567759Y2 - 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. 8, there is provided a jack b rotatably supported by a key a, and pressurizing means c for applying a pressure against the movement of the jack b to the jack b. A keyboard device of an electronic musical instrument is known, in which the jack b rotates just before the end of the key pressing operation and escapes from the pressing member c, and as the pressing member, A device using a hammer-shaped member rotatably supported is also known.

[0003]

When a hammer-like member is used as the pressing member in the above-described drawing, it is considered that this hammer-like member is provided on a bottom plate e of a case d in FIG. But for that,
There has been a problem that the shape and the like of the bottom plate e must be complicated, and the keyboard device cannot have a simple configuration.

An object of the present invention is to provide a keyboard device for an electronic musical instrument having a simple structure.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the invention according to claim 1 moves and moves by a force transmitted from a key rotatably locked to a fulcrum provided on a keyboard frame. In a keyboard device for an electronic musical instrument, comprising: a rotating jack; and a pressing member that abuts on the jack and applies a pressure against the movement and rotation to the jack, the jack is pivotally connected to a key. It is supported and penetrates a slit formed in the keyboard frame, and the pressing member is provided below the keyboard frame.

According to a second aspect of the present invention, in the first aspect, a jack passing through a slit of the keyboard frame is guided by the slit.

[0007]

According to the first aspect of the present invention, since the pressing member is provided below the keyboard frame and is operated by moving a jack passing through a slit of the keyboard frame, the keyboard device is simple. Configuration. In the invention according to the second aspect, the jack passes through the slit of the keyboard frame and is guided by the slit, so that the jack can always reliably operate the pressurizing member without separately providing a guide member.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

1 to 3 show an embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a synthetic resin key (white key) rotatably supported by a keyboard frame 2 at a base end thereof.
This is formed in a substantially box shape, the lower surface is opened, and the return load applying portion 3 (described later) is formed integrally with the return load applying portion 3 (described later) protruding downward at at least one of the side walls. A switch 4 and a fulcrum member 5 are fixed to the keyboard frame 2, and a fulcrum 6 having a weight 7 at one end is rotatably supported at the fulcrum 6 of the fulcrum member 5 as the pressure member. In the internal space of the key 1, a jack 9 is rotatably supported by a shaft 9 a integral therewith fitted into an arc-shaped concave portion 1 a formed at the lower end edge of both side walls of the key 1. Jack 9 is the key 1
Is biased in the counterclockwise direction in the figure by the other end of a strip-shaped leaf spring 11 having one end fixed to a leaf spring receiving portion 10 provided on the inner upper wall of the hammer abutting portion 12. It penetrates through the slits 22 and 23 provided in the keyboard frame 2 together with the load applying part 3 and comes into contact with the jack contact part 13 of the hammer 8. This jack 9
The hammer contact portion 12 is slightly longer than the return load applying portion 3.

The switch 4 is a switch supported on a switch board 14, and is turned when the key 1 is rotated by a predetermined angle.
Are operated by being pressed by an actuator 15 provided on the inner upper wall of the.

The operation of this embodiment will be described with reference to FIGS. 4 to 6. When the key 1 is depressed, the key 1 starts to rotate counterclockwise, and the jack 9 moves the keyboard frame 2 accordingly.
Is moved downward by being guided by the slit 22. As the jack 9 moves, the hammer contact portion 12 presses the jack contact portion 13, and the hammer 8 starts rotating counterclockwise. At this time, the player adjusts the load adjusting coil spring 16.
And the load of the hammer 8 is received. When the key 1 is further depressed, the projection 17 of the jack 9 comes into contact with the keyboard frame 2 as shown in FIG. 4, and the jack 9 starts rotating. At this time, the player receives the drag from the keyboard frame 2 and the load of the leaf spring 11 provided on the jack 9. When the key 1 is further depressed, the jack 9 comes off the hammer 8 as shown in FIG. However, the hammer 8 continues to rotate due to inertia, and the self-weight of the hammer 8 is not transmitted to the key 1, so that the player feels at this time that the hammer 8 comes out momentarily. Thereafter, the key 1 contacts the key lower limit stopper felt 18, and the rotation of the key 1 ends. The hammer 8 is a hammer upper stopper felt 19.
After the contact with the body, it starts to rotate clockwise by its own weight,
As shown in FIG. 7, the jack contact portion 13 contacts the return load applying portion 3 of the key 1 to prevent the hammer 8 from rotating and returning. Since the contact force is transmitted to the player through the key 1, it has an effect of making the hammer feel as if the hammer returns after striking in a normal acoustic piano. At this time, Jack 9
Hammer contact part 12 of hammer 8 jack contact part 1
I can't return to 3.

At the time of key release, the key 1 is generated by the combined weight of the weight of the hammer 8 and the elastic force of the coil spring 16 for adjusting the load.
Returns to the initial position where it contacts the key upper limit stopper felt 20 shown in FIG. 1, the hammer 8 also contacts the hammer lower limit stopper felt 21, and its rotation ends. Due to the elastic force, the hammer 8 quickly returns to the jack contact portion 13. Since the load of the hammer 8 is transmitted to the key 1 via the return load applying portion 3 by the contact of the jack contact portion 13 of the hammer 6 with the return load applying portion 3 of the key 1 after the key is depressed, When the key 1 returns in a state where the load of the hammer 6 is constantly applied to the return load applying unit 3, a sense of mass is given to the finger in contact with the key 1. Therefore, the sense of mass is imparted to the key being pressed again during the return, and the sense of mass is not impaired even when the player repeatedly hits.

FIG. 7 shows another example of a keyboard device of an electronic musical instrument to which the present invention is applied.

In FIG. 1, reference numeral 8a denotes an air damper or an elastic member as the pressurizing member, and a movable member 25 is fitted to a cylindrical body of the air damper or a cylindrical body 24 accommodating an elastic body. The upper end of the movable member 25 corresponds to the jack contact portion of the hammer.
, And the return load applying part 3 integrally molded with the key is opposed to the key.

The operation is almost the same as in the above embodiment.

[0017]

[Effects of the Invention] As described above, according to the present invention, Jack
Pressurizing means rotatably supported by the key and penetrating through the slit of the keyboard frame, abutting against the jack and applying pressure against the movement and rotation of the jack to the jack is provided below the keyboard frame. Therefore, there is an effect that the configuration of the keyboard device of the electronic musical instrument is simplified, and since the jack is guided by the slit of the keyboard frame, there is no need to provide a separate guide device, and the keyboard device is further simplified. Has an effect.

[Brief description of the drawings]

FIG. 1 is a cutaway side view of an embodiment of the present invention.

FIG. 2 is a perspective view of a main part of the embodiment.

FIG. 3 is a side view cut along the line AA of FIG. 2;

FIG. 4 is a cut-away side view of the above-described embodiment in which the jack has started to rotate after the key is pressed.

FIG. 5 is a cut-away side view of the above embodiment in which the jack is released from the hammer after key depression

FIG. 6 is a cutaway side view of the above embodiment immediately after the key is released.

FIG. 7 is a cutaway side view of another keyboard device to which the present invention is applied;

FIG. 8 is a cutaway side view of a keyboard device of a conventional electronic musical instrument.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Key 2 Keyboard frame 8 Hammer 9 Jack 12 Hammer contact part 13 Jack contact part 22 Slit 23 Slit

Claims (2)

(57) [Scope of request for utility model registration] 1. A jack that moves and rotates by a force transmitted from a key rotatably locked to a fulcrum provided on a keyboard frame, and a pressure that abuts the jack and resists the movement and rotation. And a pressurizing member for applying pressure to the jack, the jack is rotatably supported by a key and penetrates a slit formed in the keyboard frame, and the pressurizing member is A keyboard device for an electronic musical instrument, which is provided below the keyboard frame. 2. The keyboard device for an electronic musical instrument according to claim 1, wherein the jack passes through a slit formed in the keyboard frame and is guided by the slit.