JPS589277Y2 - Expression device for electronic musical instruments - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an expression device for an electronic musical instrument in which a shirt cover can be attached to the back surface with a single touch.

Conventionally, in expression devices for electronic musical instruments,
The base of the shirt plate is placed between the light source and the light receiving element, which are placed opposite to each other on the frame, and is placed on the back of the expression pedal to vary the amount of light received by the light receiving element according to the amount of rotation of the expression pedal. It was common to fasten with screws.

Figure 1 shows one of such conventional expression devices.
1 is an expression pedal which has a rising piece 1a on the back side and is pivotally connected to a frame 3 by a support shaft 2; 4 has a water droplet-shaped opening 41; Accordingly, the rising piece 1a of the expression pedal 1
Shutter plates 6 and 7 fixed to the frame 3 are a light source and a light receiving element fixed to the frame 3 so as to face each other.

However, with this configuration, when screwing the shirt flap plate 4 to the expression pedal 1 with the screws 5, the rising edge of the periphery on the back of the pedal gets in the way, making it impossible to use the driver perpendicularly to the shirt flap plate 5. Since the screws must be screwed together, the workability is poor and the number of parts increases, which is a cause of high costs.

In view of the above points, in this invention, vertical pieces arranged in two rows on the back of the expression pedal are integrally molded, and these vertical pieces and the shirt plate are provided with a horizontal force direction and a vertical force direction, respectively. To provide an expression device for an electronic musical instrument in which a shirt plate can be attached to the back surface of an expression pedal with a single touch without using screws or the like by providing a regulating means for regulating the movement of the expression pedal.

Hereinafter, this invention will be explained with reference to the embodiments shown in FIGS. 2 and 3 of the accompanying drawings. Parts equivalent to those in FIG.

In this invention, as shown in FIG. 2, on the back of the expression pedal 1, a pair of first,
Second vertical pieces 1a, 1b are arranged vertically, and on both sides of the first and second vertical pieces 1a, 1b, the first and second vertical pieces 1a,
A pair of third and fourth vertical pieces 1c and ld are aligned and vertically arranged in parallel with 1b to form the first and second vertical pieces 1a and 1b and the third and fourth vertical pieces ic.

1d, and protrusions 1e and if are provided on the surfaces of the third and fourth vertical pieces lc and ld facing the first and second vertical pieces 1a and 1b, respectively.

- force, the protrusion 1 of the third vertical piece 1c at the base of the shirt top plate 4;
1-shaped groove 4a that engages with e, the projection 1f of the fourth vertical piece 1d
the horizontal groove 4b that engages with the second vertical piece 1 of the first vertical piece 1a;
An elastic cut-and-raised piece 4c that can be engaged with the end on the b side is provided respectively.

This invention has such a structure, and the cut and raised piece 4c of the shirt flap plate 4 is connected to the first part of the expression pedal 1.
While pressing against the vertical piece 1a and bending it in the direction of the shirt shirt plate 4 against its elasticity, the vertical part of the one-shaped groove 4a of the shirt shirt plate 4 is engaged with the protrusion 1e of the third vertical piece 1c, and the shirt shirt is closed. The plate 4 is divided into first and second vertical pieces 1a and Ib and third and fourth vertical pieces 1c.

1d so that it is inserted in the direction of force perpendicular to the expression pedal 1 (see FIG. 3a).

Then, the protrusions 1e and 1f of the third and fourth vertical pieces lc and id are engaged with the horizontal portions of the cross-shaped groove 4a and the horizontal groove 4b, respectively, and the shirt flap plate 4 is moved parallel to the expression pedal 1 in the right direction. make it slide.

Vertical movement is thereby prevented.

Furthermore, at the end, as shown in FIG. Prevents horizontal movement of 3-sho.

In this state, the cut and raised piece 4c is moved to the second position by elastic force.
By pressing the vertical piece 1b, the shirt flap plate 4 is also prevented from moving in the width direction of the expression pedal 1, and finally the shirt flap plate 4 is securely fixed to the expression pedal 1 in any direction.

It is also possible to attach the shirt flap plate 4 by sliding it in the leftward direction by reversing the positions and directions of the one-shaped groove 4a and the horizontal groove 4b of the shirt flap plate 4.

As described above, according to this invention, movement of the expression pedal in the width direction, left/right direction, and vertical force direction can be prevented by simply sliding the shirt plate against the back surface of the expression pedal in the vertical and horizontal force directions. Therefore, the shack plate can be easily and reliably attached, and fixing fittings such as screws are not required.

In addition, the vertical piece provided on the expression pedal can be integrally molded with synthetic resin or the like at the same time as the expression pedal is molded, and the L-shaped groove, horizontal groove, and cut-and-raised piece of the shirt flap plate can also be molded or molded integrally with the shirt flap plate. Since it can be press-molded, it has the effect of significantly improving workability and productivity.

[Brief explanation of the drawing]

Figure 1 shows one of the expression devices of a conventional electronic musical instrument.
FIG. 2 is a perspective view of the main parts seen from the back side of the expression pedal showing the part where the shirt flap plate is attached to the expression pedal in one embodiment of this invention. FIG. FIG. 2 is a plan view showing the force method for attaching the shirt shirt plate as seen from the direction of FIG. 110. ,, expression pedal, la, 1b. 1c, 1d... Vertical piece, le, 1f...
・Protrusion, 4... Shirt plate, 4a...
L-shaped groove, 4b...Horizontal groove, 4C...
Cut-and-raised piece.

Claims (1)

[Scope of utility model registration request] A pair of first and second vertical pieces are aligned and vertically arranged in a straight line at intervals on the back surface of the expression pedal, and
A pair of third and fourth vertical pieces are aligned and vertically arranged in parallel with the second vertical piece, and protrusions are provided on the first and second vertical sides of the third and fourth vertical pieces, respectively. , an L-shaped groove in the base of the shirt shirt plate that engages with one of the protrusions, a horizontal groove that engages with another force, and an end that engages with an end on the interval side of the first or second vertical piece. An expression device for an electronic musical instrument, comprising an elastic cut-and-raised piece, and the shirt flap plate is held and held by the first to fourth vertical pieces of the expression pedal.