JPS6021875Y2 - Electronic organ key switch holding device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a key switch holding device for an electronic organ.

Conventionally, in this type of device, a presser plate is provided on the lower surface of a key a as shown in the first diagram, and when the key a is pressed down, an actuator d of a key switch C is pressed down via the presser plate. I'm trying to give it some action.

The holding plate is made of felt or soft synthetic resin, and for example, as shown in the second figure, adhesive e1 is used, or as shown in the third figure, a protrusion f provided on the holding plate is connected to a through hole provided on the underside of the key a. It was installed by inserting it into g.

In the former case, it was difficult to make the adhesion side layer have a predetermined uniform thickness.

In the case of the latter, the holding plate is inclined due to the gap formed between the protrusion f and the through hole g.

Therefore, the downward movement position of the key a and the operating point of the key switch C are different for each key, resulting in a disadvantage that the timing of sound generation is uneven.

An object of the present invention is to provide a key switch holding device that eliminates such drawbacks.

Embodiments of the present invention will be described below with reference to FIGS. 4 to 9.

In FIGS. 4 to 7, reference numeral 1 designates a lock body having a U-shaped cross section and opening on the lower surface, and a pair of tongue strips 2, 2, which are opposed to each other, are protruded from the inner surfaces of both side walls 1a, 1a.

Reference numeral 3 indicates a presser plate made of an elastic material, and grooves 3a*3a into which the tongue strips 2, 2 are fitted are formed on both sides thereof.

Thus, as shown in FIGS. 4 and 5, the presser plate 3 is attached to the lock body 1 by fitting the tongue strips 2, 2 in its grooves 3a, 3a.

The holding plate 3 is made of rubber, soft synthetic resin, etc., and the width of the grooves 3a, 3a is narrower than the thickness of the tongue strips 2, 2. It is in a state where the tongue strips 2, 2 are sandwiched, and is not moved by the operation of the lock body 1.

However, if necessary, both 2 and 3 may be bonded together using an adhesive.

Reference numeral 4 indicates a key switch, and its actuator 4a faces the lower surface of the presser plate 3.

5 is a chassis, 6 is a spring, and 7 is a guide pin.

The presser plates 3 shown in FIGS. 4, 5, and 7 are vertically symmetrically formed, but when one of them is formed to be thick as shown in FIG. 8, it is necessary to select one of them. The operating point of the key switch 4 can be selected by

Further, when the wall thickness of one side is sloped or stepped as shown in FIG. 9, the operating point of the key switch 4 can be arbitrarily set by moving it.

In this way, according to the present invention, both side walls 1a of the lock body 1
, la are made to protrude from the inner surfaces of the tongue strips 2, 2, and the presser plate 3 is fitted onto the tongue strips 2, 2 at the grooves 3a, 3a on both sides of the tongue strips 2, 2. It is mounted accurately without tilting as in the case of binding, and the sounding positions are aligned by the downward movement of each weight, and the mounting has the effect of being very easy to operate and being inexpensive.

[Brief explanation of the drawing]

Fig. 1 is a side view of the conventional device, Fig. 2 is an enlarged cross-sectional view along the line ■-■, Fig. 3 is an enlarged cross-sectional view taken along the line A side view of one example, FIG. 5 is an enlarged cross-sectional view along the line ■-V, FIG. 6 is a perspective view of a part of the key, FIG. 7 is a perspective view of the presser plate, and FIGS. 8 and 9 are FIG. 7 is a perspective view of another embodiment of the presser plate. 1... Lock body, 2... Tongue piece, 3...
...Press plate, 3a...Groove.

Claims (1)

[Scope of utility model registration request] Both side walls la, l of the lock body 1 having a U-shaped cross section and opening on the lower surface.
A pair of tongue strips 2.2 facing each other are protruded from the inside of the tongue strip 2.2, and a presser plate 3 made of an elastic material having grooves 3a, 3a on both sides is attached to both tongue strips 2, 2, with grooves 3a on both sides thereof. , 3a is a key switch holding device for an electronic organ that is fitted and opened.