JPS5943596Y2 - Keyboard device for electronic musical instruments - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electronic musical instrument tilting device equipped with keys integrally molded of synthetic resin or the like, and is particularly intended to improve the touch of the keys when playing.

2. Description of the Related Art Keyboard devices used in conventional electronic organs and the like are usually integrally molded from synthetic resin or the like.

In the case of such keys, the cross section is generally U-shaped and the back side is hollowed out to prevent sink marks, clouds, etc. from forming on the key surface and damaging the key's appearance. Therefore, the mass of the key itself is extremely light.

When playing a keyboard device with such a structure, when playing a song with a fast tempo, the keys themselves have a small inertial mass, so they have excellent followability to the fingers, making it possible to play crisply and easily. .

In the case of songs with a slow tempo, the mass was too small, making it difficult to fully express the performer's intentions and making it difficult to express a profound feeling, which was unsatisfactory.

In addition, if the mass of the key is small, the pressure of the coil spring that constantly applies an upward deflection force to the key is transmitted directly to the player's fingers, making it difficult to feel the sense of inertia that is felt when playing a piano. There was a drawback that it lacked that feeling.

One way to improve these shortcomings is to create a keyboard device that increases the inertial mass of the key by providing a weight on the back of the key to provide a good playing feel. However, in all of these methods, the process of molding the key is complicated, the mold is complicated and expensive, and sink marks occur, damaging the appearance of the key. Therefore, it could not be said that the effect was sufficiently demonstrated.

The present invention improves the conventional drawbacks and provides a keyboard device equipped with keys made of synthetic resin as described above, which has an inertial mass that has a good key touch that can fully express the player's intention. The dog becomes key easily.

Furthermore, the present invention relates to a keyboard device for an electronic musical instrument, which is provided at a low cost and is a weight made of a thin metal plate, which is fitted into a hollowed out part of the back of the key by utilizing the elastic deformation or plastic deformation of the material.

Examples thereof will be described below with reference to FIGS. 1 to 4 of the drawings.

That is, in FIG. 1, numeral 1 is a key molded from synthetic resin or the like, and the back surface of the slant 1 is hollowed out to have a U-shaped cross section.

This key 1 has a notch 2 on the upper surface of its rear end, and a fulcrum is formed by engaging the notch 2 with a square hole 4 formed in the rear rising surface of the frame 3.

Further, a coil spring 1 is arranged between a protrusion 5 on the rear back surface of the key 1 and a protrusion 6 on the frame 3 facing the protrusion 5,
The coil spring γ constantly applies an upward rotational force to the operating end a of the key 1 around the fulcrum.

This rotational movement is caused by an upper limit stopper 8 formed integrally with the key 1.
The lower end of the key 1 is regulated upward by contacting the upper limit damper 9 attached to the lower surface of the frame 3, and the downward rotational movement is restricted by the lower limit damper 10 attached to the upper surface of the frame 3. It is regulated by the contact between the two.

Movement of the key 1 in the left and right direction is restricted by the key guide 11.

When playing, by pressing down the operating end a of the key 1, which is mounted on the frame 3 so as to be able to swing up and down about a fulcrum, the key 1 moves around the fulcrum against the upward driving force of the coil spring l. As the key 1 rotates, an actuator 12 integrally formed on the lower surface of the key 1 descends to open and close a switch (not shown) fixed to the frame 3.

A weight 14 made of a thin metal plate is attached to a hollowed out portion 16 between the leg portion 13 integrally provided on the back surface near the operating end a of the key 1 and the operating end a of the key 1.

In this case, the connection between the leg 13 and the surface of the key 10 is generally the key 1
0 Gap 15 to prevent sink marks etc. from occurring on the surface
In Fig. 1, a weight 14 is placed in this gap 15.
The weight 14 is hollowed out and fixed to the weight s16 by fitting an L-shaped locking part 17 formed by bending the end of the weight 14 and applying a strong force to the curved surface of the weight 14 to cause plastic deformation. .

The weight 14 may be made of an elastic material and fixed using its elastic force.Also, even if the gap 15 is not provided, the weight 14 having a serrated end 18 as shown in FIG. 3 may be used. The weight 14 can be firmly fixed to the key 1 by inserting the serrated end 18 into the upper end of the leg 13.

In the electronic musical instrument keyboard device of the present invention configured as described above, the weight is attached at a position away from the fulcrum of the key, so the inertial mass of the key itself can be increased.
It is possible to provide a keyboard device with an extremely good key touch, and one and both ends can be engaged with the hollowed out part and the leg part without requiring any fittings or special molds for attaching the weight. Because of this, it can be installed very easily and reliably, and the inertial mass of the key used for transportation can be easily increased, improving work efficiency, and being advantageous in terms of cost. The practical effects are significant.

[Brief explanation of the drawing]

Fig. 1 is an i11 sectional view showing an embodiment of the keyboard device for an electronic musical instrument according to the present invention, Fig. 2 is a perspective view of the main parts thereof, and Fig. 3 is a perspective view Q of an embodiment of the weight according to the present invention. , FIG. 4 is a perspective view of another embodiment of the weight. 1...Key, 3...Frame, 1...
...Coil spring. 13... Legs, 14... Weight, 15...
...Void. 16... Hollowed out portion, 18... Serrated end.

Claims (1)

[Claims for Utility Model Registration] The jet is supported on a frame so as to be able to swing up and down, and the operating end is always urged upward by a coil spring.It is molded from synthetic resin, etc., and has legs on the lower surface near the operating end of the jet. A hollowed out part is provided on the bottom of the operating end. A keyboard device for an electronic musical instrument, in which a weight is attached from a metal plate between the leg portion and the hollowed portion so as to be engaged at both ends.