JPH09305175A - Pedal device of keyboard musical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the pedal device of the keyboard musical instrument which is small in the number of components and man-hours and reducible in weight, and stably operates as a keyboard musical instrument. SOLUTION: The device consists of an inverted gutter type pedestal 1 which is formed in a channel shape and a pedal 2; and the pedestal 1 has through holes 6 and 6 formed in both the side walls of one inverted gutter part 1a and the other inverted gutter part 1b facing each other and also has the fulcrum projection 7 of the pedal 2 formed at the upper edge of the through hole 6 of one side wall of the inverted gutter part 1a, and the pedal 2 is so formed that one end engages the fulcrum projection by being inserted into the through holes 6 of the inverted gutter parts 1a and 1b of the pedestal 1 and the other end moves up by a return spring 3 to abut against an upper-limit stopper part formed at the upper edge of the through hole 6 of the side wall of the other inverted gutter part 1b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pedal device for a keyboard musical instrument such as an electronic musical instrument.

[0002]

2. Description of the Related Art Conventionally, for example, as shown in FIGS. 5 and 6, an L-shaped bent portion b formed at the rear end of a metal chassis a.
The rear end of the pedal c is inserted into the through hole of the pedal c, the hole e of the pedal c is fitted into the projection d formed on the upper edge of the through hole, and the pedal clamp is provided to prevent the pedal c from being separated from the projection d. The plate f is attached from the rear of the chassis a, and the pedal c is used with the protrusion d as a fulcrum.
Is swingably supported on the metal chassis a, and a U-shaped metal upper limit stopper g whose both ends are bent at right angles as shown in FIG. 7 is put on the pedal c, and both ends are screwed to the chassis a. A pedal device of, for example, an electronic piano fixed by h and h is known, and as shown in FIG. 8, a molded device in which a chassis a and an upper limit stopper g are integrally formed is also known.

[0003]

The former of the above-mentioned conventional pedal device for a keyboard instrument is a component separate from the metal chassis a and the metal upper limit stopper g, and the upper limit stopper g is screwed to the chassis a. Since the pressing plate f for preventing the pedal c from coming off the projection d is required, the number of parts and the number of steps are increased, and the chassis a is thick, so that the weight is increased. Since the chassis a and the upper limit stopper g are integrated, the number of steps is reduced, but the thickness of the chassis a and the upper limit stopper g is thin and the strength of the chassis a is weak because it is a molded product. There is a problem that the chassis a may be deformed and the operation of the keyboard instrument may become unstable.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pedal device for a keyboard musical instrument which has a small number of parts and man-hours, can be made lightweight, and can be stably operated as a keyboard musical instrument.

[0005]

In order to solve the problems, the present invention comprises a reverse gutter-shaped pedestal and a pedal, which are formed in a U shape, as set forth in claim 1, and the pedestal comprises: Through holes are formed in both side walls of the one reverse gutter part and the other reverse gutter part facing each other, and a fulcrum projection of the pedal is formed at an upper edge of the through hole of one sidewall of the one reverse gutter part. The pedal is inserted into a through hole of one and the other of the reverse gutters of the pedestal so that one end engages with the fulcrum projection and the other end moves upward by a return spring to reverse the other. The return spring is a coil spring, and the return spring is a coil spring, and the upper limit stopper portion is formed on the upper edge of the through hole of the side wall of the trough portion. Is arranged and one end is locked to the top wall of the pedestal, and a screw penetrating the top wall and the pedal is inserted. It is preferred that fastened to the pedal in a nut screwed on the screw. Further, as described in claim 3, in the pedal device according to claim 1 or 2,
The fulcrum projection of the pedal is composed of two pieces facing each other with a gap, and a convex portion is formed on the outer side of the tip of each of the two pieces. It is preferable that the pedal is swingably locked by the fulcrum projection by contracting and inserting the projection of the two pieces at the edge of the hole.

According to the structure described in claim 1, since the pedal is swingably supported on the inverted gutter-shaped base formed in a U-shape, when the pedal is depressed, the load is light even if the base is lightweight. There is no deformation and the operation of the keyboard instrument does not become unstable. Further, it can be manufactured with a small number of parts and man-hours. According to the configuration described in claim 2, the coil spring can be easily attached to the pedal when the pedal is attached to the pedestal. According to the configuration described in claim 3, the pedal can be easily and surely locked to the fulcrum without increasing the number of parts.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an example of a pedal device of an electronic keyboard instrument of the present invention.

In the figure, 1 is a pedestal, 2 is a pedal, 3
Is a return coil spring, and 4 is a switch that is operated by being pressed by the pedal 2.

As shown in FIG. 2, the pedestal 1 is an inverted gutter-shaped molded body made of, for example, metal or synthetic resin, and has opposite side gutters 1a and 1b on both side walls. 5,
5, through holes 6 are formed respectively, and a fulcrum projection 7 of the pedal 2 is provided on the upper edge of the through hole 6 on one side wall 5 of the reverse gutter portion 1a.
And a pair of projections 8 for lower limit of the pedal 2 are formed on the lower edge of the through hole 6 in the one side wall 5 of the reverse gutter portion 1b. The pedal 2 has a U-shaped cross section and is inserted into the through holes 6 and 6 of the reverse gutters 1a and 1b of the pedestal 1 so that a hole 9 formed at one end fits into the fulcrum projection 7 and swings. It is made freely movable. Although not shown in FIG. 1, the pedal 2 is attached with a restraining plate similar to that shown in FIG. 6 so as not to separate from the fulcrum protrusion 7. The return coil spring 3 has a hole 1 formed in the top wall 10 of the pedestal 1 and the coil spring 3 as shown in FIG.
1 and the pedal 2 is attached to the pedal 2 by screwing a nut 14 into a screw 13 inserted through a hole 12 formed in the pedal 2 and tightening the screw 13. The upper edge of the through hole 6 of the one side wall 5 of the reverse gutter portion 1b is an upper limit stopper portion of the pedal 2, and a cushioning material 15 such as felt is fixed to the upper limit stopper portion.

The switch 4 is mounted on a flat plate portion 18 connected to an edge of a side wall 5 inside the inverted gutter-shaped pedestal 1 and pressed by a pressing portion 19 of the pedal 2. Be operated.

Through holes 6 and 6 for inserting one pedal 2 are provided in the reverse gutter portions 1a and 1b of the pedestal 1 shown in FIG.
However, it is needless to say that the through holes 6, 6 for inserting the plurality of pedals 2 may be formed.

FIG. 4 shows another example of the fulcrum projection of the pedestal 1 for locking the pedal 2.

The fulcrum projection 7a of the pedestal 1 is composed of two pieces 16 and 16 opposed to each other with a gap therebetween. The two pieces 16 and 16 are formed with projections 17 and 17 respectively on the outer sides of their tip portions, and both projections The dimension between 17 and 17 is larger than the diameter of the hole 9 of the pedal 2. The pedal 2 has a fulcrum protrusion 7a in its hole 9.
2 pieces 16, 16 of the insertion hole 9 in a state that the interval is narrowed
By locking the convex portions 17, 17 of the two pieces 16, 16 on the edge of the, the fulcrum projection 7a is swingably locked. According to this configuration, it is possible to eliminate the pressing plate that prevents the pedal 2 from being detached from the fulcrum projection 7a, and the number of parts is reduced.

In the above description, the pedal device of the electronic keyboard instrument has been described, but the present invention can be applied to other keyboard instruments.

[0016]

The present invention has the effects that the number of parts and man-hours can be reduced, the weight can be reduced, and the keyboard instrument can be stably operated.

[Brief description of drawings]

FIG. 1 is a sectional view of an example of a pedal device of an electronic keyboard instrument of the present invention.

FIG. 2 is a perspective view of a pedestal of the pedal device shown in FIG.

3 is an exploded view of a return coil spring attachment portion of the pedal device shown in FIG. 1. FIG.

FIG. 4 is a perspective view of another example of the fulcrum protrusion of the pedal device.

FIG. 5 is a cross-sectional view of an example of a conventional pedal device.

6A and 6B are exploded perspective views of a fulcrum portion of the pedal device shown in FIG. 5, respectively.

7 is a perspective view of an upper limit stopper portion of the pedal device shown in FIG.

FIG. 8 is a side view of another example of the conventional pedal device.

[Explanation of symbols]

 1 pedestal 2 pedal 3 coil spring 5 side wall 6 through hole 7, 7a fulcrum protrusion 9 hole 10 top wall 11 hole 12 hole 13 screw 14 nut 16 fulcrum protrusion piece 17 convex part

Claims (3)

[Claims] 1. A reverse gutter-shaped pedestal formed in a U-shape and a pedal, wherein the pedestal has through holes formed in both side walls of one of the opposite gutters and the other of the opposite gutters that face each other. Is
A fulcrum projection of the pedal is formed on an upper edge of a through hole of one sidewall of the one reverse gutter portion, and the pedal is inserted into the through holes of the one and the other reverse gutter portions of the pedestal. One end is engaged with the fulcrum projection, and the other end is moved upward by a return spring to come into contact with an upper limit stopper portion formed at the upper edge of the through hole of the side wall of the other reverse gutter portion. Pedal device for keyboard instruments. 2. The return spring is a coil spring,
A screw which is arranged below the pedal and has one end locked to a top wall of the pedestal, a screw penetrating the top wall and the pedal is inserted, and a nut screwed to the screw is tightened to the pedal. A pedal device for a keyboard musical instrument according to Item 1. 3. The fulcrum projection of the pedal is composed of two pieces facing each other with a gap, and a convex portion is formed outside the tip of each of the two pieces, and the fulcrum is formed in a hole formed at one end of the pedal. 2 pieces of the projection for use are contracted and inserted into the edge portion of the hole.
3. The pedal device for a keyboard instrument according to claim 1, wherein the pedal is swingably locked to the fulcrum projection by locking a convex portion of one piece.