JPH07219542A - Pedal device of electronic musical instrument - Google Patents

Abstract

PURPOSE:To obtain the pedal device in simple structure which is easily assembled by inserting and projecting a fulcrum shaft part, which has cuts formed atop of a pedal arm, into and from a fulcrum hole of a chassis. CONSTITUTION:The fulcrum shaft part which has the cuts formed at two positions atop of the pedal arm 4 in parallel in its length direction is formed, the other end is formed in a pedal shape, and a spring positioning projection is provided successively at the center part nearby the fulcrum shaft part. The fulcrum hole is formed rectangularly penetrating the pedal chassis so that the fulcrum shaft part of the arm can smoothly be inserted and projected therefrom, and a guide hole 9 is formed opposite the fulcrum hole. A bar ring for the positioning of a spring 5 and a hole and a claw for the fixation of a circuit board 6 are provided successively. Then the pedal arm 4 is inserted to penetrate the guide hole 9, and while the spring 5 is compressed and energized, the fulcrum shaft part is inserted into and projected from the fulcrum hole; and then both end projection parts are bent and spread horizontally to the right and left to constitute a fulcrum.

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 an electronic musical instrument such as an electronic piano.

[0002]

2. Description of the Related Art A conventional pedal device for an electronic musical instrument such as an electronic piano will be described below. FIG. 3 is a perspective view of a conventional pedal device, and is composed of a perspective view in which constituent parts of the pedal device are disassembled and a perspective view in which the same constituent parts are assembled and completed. The pedal device of FIG. 3 has a pedal arm 2a forming a notch 2b in the fulcrum shaft portion and a fulcrum hole 3a forming a fulcrum.
And a chassis 1a having a stopper 5a for stopping the rotation downward, an auxiliary member 4a and a fastening member 8a for pivotally mounting the notch 2b of the fulcrum shaft portion, and a lateral swing of the pedal arm 2a is prevented. Further, it is composed of a stopper metal fitting 6a that holds the pedal arm rotatably in the vertical direction, and a spring 7a that returns the pedal arm to the vertical rotation. The notch 2b of the fulcrum shaft portion is formed orthogonally to the longitudinal direction (axial direction) of the pedal arm, while the fulcrum hole 3a provided in the chassis serving as the bearing has a convex through hole. Is.

[0003]

However, in the above-mentioned conventional pedal device, the pedal arm 2a does not drop out or fall during use of the performance, and it rotates vertically and abnormally. The auxiliary member 4a, the fastening member 8a, and the stopper metal fitting 6a are required in order to exhibit desired functions and performances without causing the problem. Therefore, there is a problem that the material cost and the assembly man-hour increase. It was

The present invention provides a pedal device for an electronic musical instrument, such as an electronic piano, which can solve the above problems and reduce the cost.

[0005]

In order to solve the above-mentioned problems, the present invention provides at least one notch in the longitudinal direction (axial direction) of the tip portion of the pedal arm,
A fulcrum shaft portion having a concave or (outer 1) shape is formed.

[0006]

[Outer 1]

Further, the pedal chassis is provided with a rectangular pierced fulcrum hole as its bearing, and a guide hole is also provided at a position facing the front.

Now, after the pedal arm is passed through the guide hole, the fulcrum shaft portion is inserted into the fulcrum hole while compressing and urging the spring. After that, the projections at both ends of the fulcrum shaft portion are horizontally laid horizontally to form an open leg bending fulcrum.

[0009]

According to this structure, since the fulcrum shaft portion provided with two notches at the tip of the pedal arm is formed so as to be inserted and projected into the fulcrum hole of the chassis, the fulcrum shaft portion The protrusions at both ends can be bent horizontally to the left and right to form a fulcrum. Further, since the pedal arm is inserted through the guide hole of the chassis, the vertical vertical rotation of the pedal is controlled by the upper and lower limit stoppers thereof and the guide wall for preventing lateral shake. Therefore, the desired functions and performances described above can be exhibited without the need for auxiliary members or fastening members for forming the fulcrum, the above-mentioned stopper fittings, and the like. In addition, the pedal arm located in the guide hole is provided with a gap to prevent noise such as frictional noise between the guide wall and the pedal arm during vertical vertical rotation, and a cushioning material such as felt is attached to the pedal arm. Has been.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a pedal device for an electronic musical instrument such as an electronic piano according to an embodiment of the present invention, which is completed in assembly, and FIG. 2 is an exploded perspective view of the components shown in FIG. In these figures, the same parts as those shown in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted.

In FIG. 1, reference numeral 1 denotes a pedal chassis, 4
Is a pedal arm, 5 is a spring for returning the pedal arm to rotate up and down, and 6 is a circuit board having a switch for controlling electric signals (not shown because it is arranged on the back surface of the circuit board) and an electronic circuit.

In FIG. 2, two notches are provided at the tip of the pedal arm 4 in parallel with the longitudinal direction (axial direction) to form a fulcrum shaft portion 3, and the other end is for foot operation. Is formed into a pedal shape 7, and the spring positioning projection 8 of 5 is provided side by side in the vicinity of the fulcrum shaft portion in the central portion. On the other hand, the fulcrum hole 2 of the pedal chassis is rectangularly penetrated so that the fulcrum shaft portion 3 of the arm can be smoothly inserted and projected, and a guide hole 9 is provided at a position facing the fulcrum hole 2 in front. A hole 12 and a claw 13 are also provided for fixing the burring 11 and the circuit board 6 for positioning the spring 5. Now, after inserting the pedal arm 4 into the guide hole 9 and penetrating it, and inserting the fulcrum shaft portion 3 into the fulcrum hole 2 while pushing the spring 5 in compression,
The protrusions on both ends are bent horizontally to form a fulcrum, as shown by 10 in FIG. Therefore, the pedal arm does not fall off the chassis 1 and does not fall, and
During the up and down rotation and return of the pedal arm during performance,
No abnormal noise is generated at the fulcrum. In addition, rotation,
The return stroke is made by bending the upper and lower parts of the guide hole 9 into parts of the chassis as stoppers for stopping, respectively.
Is provided. In order to prevent the lateral movement of the pedal arm, a guide wall 15 in which a part of the chassis is bent is provided at the left and right portions of the guide hole. In controlling the electric signal in the operation of the pedal device, the circuit board 6 is fixed through the hole 12 and the claw 13 of the chassis 1 as shown in FIG. On the back surface of the circuit board, a switch (not shown because it is a back surface) is arranged at a position facing each pedal arm 4, and the switch is opened and closed by rotating and returning the pedal arm. To control electrical signals.

[0013]

As described above, according to the present invention, in the fulcrum structure of the pedal arm, the fulcrum shaft portion of the pedal arm is inserted and protruded into the fulcrum hole of the chassis, and the projections at both ends of the fulcrum shaft portion are horizontally arranged. Consists only of open leg bending, does not require any other auxiliary member or fastening member, desired function, performance,
That is, it is possible to realize a pedal device for an electronic piano or the like, which is free from dropping out of the chassis, dropping, and causing abnormal noise, and has a simple structure and easy assembly.

[Brief description of drawings]

FIG. 1 is a perspective view of completion of assembly of an electronic musical instrument pedal device according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of components of an electronic musical instrument pedal device according to an embodiment of the present invention.

FIG. 3 is a perspective view of a conventional electronic musical instrument pedal device.

[Explanation of symbols]

 1 Pedal chassis 2 Support hole 3 Support shaft part 4 Pedal arm 5 Spring 6 Circuit board 9 Guide hole

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Kodama 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Yukichi Kimura 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Hiroyuki Kanamata, 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd.

Claims (4)

[Claims] 1. A fulcrum hole and a protrusion for erecting a spring,
A guide hole for preventing lateral shake of the pedal arm and for turning and stopping it vertically, a chassis for fixing a circuit board having an electric signal control switch and an electronic circuit, and a chassis for holding a fulcrum shaft are formed. A pedal device for an electronic musical instrument, comprising a pedal arm that opens and closes the switch, a spring that returns the pedal arm to rotate up and down, and the circuit board. 2. The fulcrum portion has a structure in which the fulcrum hole of the chassis is penetrated to form a rectangular shape, and the fulcrum shaft portion at the tip of the pedal arm has at least one notch in the longitudinal direction. After inserting the fulcrum shaft into the fulcrum hole, the notch length that prevents the pedal arm from wobbling laterally when the both ends of the arm tip fulcrum shaft are bent horizontally The pedal device for an electronic musical instrument according to claim 1, which has a height. 3. The fulcrum is assembled by inserting the fulcrum shaft portion of the pedal arm into the fulcrum hole of the chassis, and bending the left and right projections at both ends of the arm tip fulcrum shaft portion horizontally and horizontally. 2. The pedal device for an electronic musical instrument according to claim 1, wherein the pedal arm does not drop / fall from the chassis and does not emit an abnormal noise during use. 4. The pedal arm for preventing abnormal noise when the pedal arm is laterally swung, and when the pedal arm is vertically rotated and stopped.
2. The electronic musical instrument pedal device according to claim 1, wherein the arm is provided with a cushioning material such as felt at a predetermined position where it comes into contact with the guide hole.