JPH06301376A - Keyboard and assembling method for electronic musical instrument - Google Patents

Abstract

PURPOSE:To easily perform assembly and maintenance by mounting springs for return similarly from the upside after keys are mounted on a key supporting member. CONSTITUTION:A through hole 4 to be observed from the upside is provided on a key supporting member 1. A key 2 is provided with a spring lock part 13 to be observed from the upside and an almost vertical rear terminal board 12 provided with a spring guide plane. The key 2 is mounted from the upside to the through hole 4 of the key supporting member 1 so as to be freely vertically oscillated, next, one engage part 11b of a compression operating return spring 8 for applying turning habits in a return direction to the key 2 is locked from the upside to a spring lock part 14 of the key supporting member 1, and another engage part 11a is slid from the upside along the rear terminal board 12 of the key 2 and locked to the spring lock part 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard device for an electronic musical instrument and a method for assembling the electronic musical instrument, which facilitates the mounting work of a return spring and improves the productivity.

[0002]

2. Description of the Related Art A keyboard device in an electronic musical instrument such as an electronic organ has hitherto been pressed by a spring force of a return spring composed of a tension coil spring, a compression coil spring, etc. mounted between a key and a key support member. The operated key is rotated back to the original position. In this case, when assembling the keyboard device, one end of the return spring is hooked on the spring locking part provided on the key, and then the other end is hooked on the spring locking part provided on the key supporting member to assemble the spring (or vice versa). .

[0003]

However, in such a conventional keyboard device, one end of the return spring is hooked on the spring locking portion provided on the key, and then the other end is provided on the key support member. When hooking on the stopper, the key is held by one hand, and the other end (or one end) of the return spring is held by the other hand to extend or compress the spring and the spring engagement of the key or the key support member. Because it hooks on the stop,
Due to the reaction, the return spring comes off and falls, and when it is extended or compressed more than necessary, the spring pressure changes, and it is impossible to apply a predetermined return force to the key.

Further, as disclosed in, for example, Japanese Utility Model Publication No. 54-26919 and Japanese Utility Model Publication No. 54-29780, when a return spring is arranged immediately below the key, the return operation is performed when the key is attached. Since the work spring becomes invisible, it is difficult to set it at a predetermined position because it is difficult to set, and in particular, in the keyboard device of Japanese Utility Model Publication No. 54-29780, a return spring is used when the key is removed during maintenance. However, there are various problems such as the fact that they tend to fall from the hole of the key supporting member to the inside, and the electric circuit may be short-circuited.

The present invention has been made in view of the above conventional problems, and an object thereof is to mount a key on a key support member and then mount a return spring from above. (EN) Provided is a keyboard device for an electronic musical instrument and an assembling method thereof, which can be easily assembled and maintained.

[0006]

In order to achieve the above object, the invention according to claim 1 supports a key, and also has a key support having a locking portion which is visible from above when the key is attached. A member, a horizontal plate for pressing operation, and a rear end plate that is substantially vertical and has a spring locking portion and a spring guide surface that are visible from above, and are arranged from above with respect to the key support member. And a vertically swingable key, one end of which is visibly locked to the spring locking portion of the key from above and the other end of which is also visually observable from the locking portion of the key supporting member. And a compression action return spring for imparting a habit of returning to the key in a rotational direction by pressing the key support member and the key at both ends. According to a second aspect of the present invention, a key having a horizontal plate for a pressing operation and a substantially vertical rear end plate having a spring locking portion and a spring guide surface which is visible from above is provided as a key support member. It is attached to the stopper so as to be swingable from the upper direction to the upper direction, and then one end of a compression action return spring that gives the key a turning tendency in the return direction is slid from above along the spring guide surface of the key. And the other end is also locked to the locking part of the key support member from above.

[0007]

In the invention described in claims 1 and 2, the key is mounted on the key support member so as to be vertically swingable from above. Similarly, the return spring is mounted along the spring guide surface of the key from above, so that one end is locked to the key spring locking portion and the other end is locked to the key supporting member locking portion. By that,
It is visible from above and gives the key a turning habit in the return direction.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings. FIG. 1 is a longitudinal sectional view showing an embodiment of a keyboard device according to the present invention. In the figure, a key 2 which is arranged on the key supporting member 1 so as to be vertically swingable is integrally formed of synthetic resin or the like to form a horizontal plate 2A forming an upper surface and a rear plate forming a rear surface. With the face plate 12 and a pair of side face plates 2a and 2b (2b not shown) forming the left and right side faces, the cross-sectional shape of which the lower surface is open is substantially U-shaped.
The rear end portions of the left and right side wall plates 2a, 2b are extended downward, and the key support member 1 is provided on the front surface side of the base portion of the extension portion 3.
Is engaged with the front edge of the through hole 4 provided in the
Is provided. Further, the key 2 has a substantially hook-shaped stopper 6 extending on the lower surface of the front end portions of the both side wall plates 2a and 2b, and the lower end portion of the stopper 6 is bored in the front surface portion of the key support member 1. It is vertically movably engaged in the through hole 7 and abuts against the upper edge of the through hole 7 by a restoring force of the key 2 by a compression return spring (hereinafter referred to as a return spring) 8 which will be described later. The key 2 is thus locked substantially horizontally. When the front end portion of the horizontal plate 2A of the key 2 is pressed against the return spring 8, the key 2 pivots counterclockwise about the pivot fulcrum O and descends. The vertically arranged actuator 9 operates the key switch 10 fixed to the back surface of the key support member 1 to electrically generate a musical tone corresponding to the key 2.

The return spring 8 is disposed slightly rearward of the key 2 from above and is formed by bending an elongated metal plate or the like into a substantially U shape, and both ends thereof are respectively folded back outward. As a result, the engaging portions 11a and 11b are configured. One of the engaging portions 11a and 11b is engaged by a recessed spring engaging portion 13 provided in the lower portion of the rear end plate 12 of the key 2, and the other engaging portion 11a is engaged. The joint portion 11b is retained by a spring retaining portion 14 provided at a rear end portion of the key supporting member 1 extending rearward of the key 2, that is, in this example, the rear edge rear surface of the through hole 4. The rear end plate 12 of the key 2 forms a spring guide surface for guiding the one end engaging portion 11a of the return spring 8 and also forms a substantially vertical rear end plate having the spring engaging portion 13. . The spring guide surface is a substantially vertical surface above the spring locking portion 13. By inserting the spring locking portion 13 of the key 2 into the through hole 4, the spring locking portion 13 of the key 2 is positioned lower than the rotation fulcrum O of the key 2 and the spring locking portion 14 of the key supporting member 1 by d1. Therefore, the force P of the return spring 8 on the key 2 acts obliquely downward, and its vertical component force P1 imparts a clockwise rotational moment (return force) to the key 2, and the horizontal component force P2 engages the key 2 with it. The recess 5 is in pressure contact with the front edge of the through hole 4. On the other hand, the force P ′ (P = P ′) of the return spring 8 on the spring locking portion 14 of the key support member 1 is acting obliquely upward, so that the other engaging portion 11 b is the spring locking portion 14. It is pressed from below and does not come off.

Next, a procedure for incorporating the key 2 and the return spring 8 will be described. After the key 2 is disposed on the key support member 1, the return spring 8 is incorporated from above the key support member 1 like the key 2. That is, when the stopper 6 is fully inserted into the through hole 7 while the key 2 is tilted downward, and the rear end of the key 2 is lowered, the extension portion 3 is inserted into the through hole 4 and the engaging recess is formed. By engaging 5 with the front edge of the through hole 4, the work of attaching the key 2 to the key support member 1 is completed, and thereafter the return spring 8 is elastically deformed in the closed leg direction as shown by the chain line. The engaging portions 11a and 11b are inserted into the through holes 4, and one engaging portion 1
When the external force is gradually removed while the spring 1a is engaged with the spring lock portion 13 of the key 2, the elastic return of the return spring 8 causes the other engagement portion 11b to move to the spring lock portion of the key support member 1. 14
To complete the mounting work of the return spring 8. When the return spring 8 is attached, if one of the engaging portions 11a is lowered while being brought into contact with the spring guide surface of the rear end plate 12 of the key 2, it is inserted into the spring engaging portion 13. You can stop.

Thus, according to the keyboard device having such a structure, after the key 2 is mounted on the key support member 1 from above, the return spring 8 can be mounted in the same visible state from above. Excellent in productivity and productivity can be improved. Further, since the return spring 8 is formed in a substantially U-shape, even if it is excessively elastically deformed, it is restored to its original state, and the spring pressure is unlikely to change like a coil spring, and handling is easy. It's easy. Moreover, it is easy to remove the return spring 8 during maintenance.

FIGS. 2 (a) and 2 (b) are side views of a return spring showing another embodiment of the present invention. FIG. 2 (a) shows the other engaging portion 11b of the return spring 8 in a substantially crank shape. And the horizontal portion 20 is pressed against the spring locking portion 14 of the key supporting member 1, and (b) is a curved portion 21 having a small diameter between the other engaging portion 11b and the spring body. Is provided. The rest of the configuration is exactly the same as that of the above-mentioned embodiment, and its operation is also the same.

3 (a) and 3 (b) are a sectional view and a plan view of an essential part of a key supporting member showing still another embodiment of the present invention. In this embodiment, the spring retaining portion 23 of the key support member 1 is provided with a spring receiving piece 23 formed by cutting and raising, and the other of the return spring 8 is provided between the spring receiving piece 23 and the rear edge of the through hole 4. By inserting the engaging portion 11b, the return spring 8 is prevented from dropping when assembled. In this case, if the spring receiving piece 23 is projected into the through hole 4, the spring 8 can be easily mounted.

In FIG. 4, an arcuate projection 24 is integrally provided directly above the spring locking portion 13 of the key 2. When the return spring 8 is assembled, the one engaging portion 11a is connected to the rear end plate 1 of the key 2.
When it is lowered while being in contact with 2, the one engaging portion 11a goes over the protrusion 24 and then enters the spring engaging portion 13, so that the engaging portion 11a engages with the spring engaging portion 13. Can be confirmed. Further, when the rear end plate 12 of the key 2 is used as the spring guide surface as described above, the return spring 8 is elastically deformed enough to allow the other engaging portion 11b to pass through the through hole 4. Well, therefore, there is no need for excessive elastic deformation. In this case, as shown in FIG. 5, the key support member 1
An inclined wall 26 is also provided on the upper surface of the rear end portion of the key support member 1 either integrally or separately, and the inclined wall 26 and the rear end plate 12 of the key 2 are provided.
If is used as the spring guide surface of the return spring 8, the work of incorporating the return spring 8 can be further facilitated, and the elastic deformation can be minimized.

FIG. 6 is a cross-sectional view of the essential parts of a key showing another embodiment of the present invention. In this embodiment, the rear end plate 12 of the key 2 is used.
A plurality of spring locking portions 13 are arranged in parallel in the lower part of the
By selectively using these, the spring force of the return spring 8 can be changed. By doing so, the spring force of the return spring 8 can be easily adjusted, and the return forces of all the keys 2 can be made uniform.

FIG. 7 is a partially omitted perspective view of a return spring showing another embodiment of the present invention. In this embodiment, a plurality of return springs 8A, 8B are arranged corresponding to each key.
.... One end of 8N is integrally connected by the connecting portion 27. Such spring return springs 8A, 8B ...
8N is formed at the same time in one step by punching a metal plate into a comb shape by pressing or the like and bending the tongue portion between the connecting portion 27 and the free end into a substantially U shape, It is extremely efficient. Also, when mounting the spring, the free end may be locked to the spring locking portion of each key and the common end may be locked to the locking portion of the key support member, so that the assembly work is easy.

In each of the above embodiments, the return spring 8 is used.
Although the case where the metal plate is formed of metal has been described, the present invention is not limited to this, and it goes without saying that the wire may be formed by a U-shaped curved wire.

[0018]

As described above, the keyboard device for an electronic musical instrument according to the present invention supports a key, and also has a key support member having a locking portion which is visible from above when the key is attached, and a key pressing member. It has a horizontal plate for operation and a spring locking portion visible from above and a substantially vertical rear end plate having a spring guide surface, and is arranged from above with respect to the key supporting member, and is arranged vertically. A swingable key, one end of which is visibly locked to the spring locking portion of the key from above and the other end of which is also visibly locked to the locking portion of the key support member from above. Since the key supporting member and the compression action return spring that gives the key a return habit in the rotation direction by pressing the key at both ends are mounted on the key supporting member, the return spring is provided. Like the key, it can be mounted from above and the spring can be attached. It is simple and easy removal work. In addition, since a spring having a substantially U-shape is used, the spring pressure is unlikely to change when the spring is attached and detached like a coil spring.

In the keyboard device assembling method according to the present invention, a key having a horizontal plate for depressing operation and a spring locking portion visible from above and a substantially vertical rear end plate having a spring guide surface is provided. One end of a compression action return spring, which is attached to the locking portion of the support member so as to be swingable from the upper direction to the upper direction and then gives the key a turning tendency in the return direction, is provided along the spring guide surface of the key. Since it is slid from above to be locked to the spring locking portion and the other end is also locked to the locking portion of the key supporting member from above, the mounting direction of the key and the return spring is By aligning them and providing a spring locking part on the substantially vertical rear end plate of the key, both the spring locking part and the locking part of the key support member can be viewed from the same direction as the spring mounting direction. And the spring can be attached from one direction, and the end of the spring It mounted spring while confirming visually that the substantially sliding vertical rear plate. As a result, a special effect is achieved in that the spring can be mounted quickly and reliably.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of a keyboard device according to the present invention.

2 (a) and 2 (b) are side views of a restoring spring showing another embodiment of the present invention.

3 (a) and 3 (b) are a fragmentary sectional view and a plan view of a key support member showing still another embodiment of the present invention.

FIG. 4 is a cross-sectional view of essential parts showing another embodiment of the present invention.

FIG. 5 is a cross-sectional view of essential parts showing another embodiment of the present invention.

FIG. 6 is a sectional view of a key part showing still another embodiment of the present invention.

FIG. 7 is a partially omitted perspective view of a return spring showing still another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Key support member, 2 ... Key, 2A ... Horizontal plate, 4 ... Through hole, 8
... Return springs, 11a, 11b ... Engaging portion, 12 ... Rear plate, 13, 14 ... Spring engaging portion, O ... Rotation fulcrum.

Claims (2)

[Claims] 1. A key support member that supports a key and has a locking portion that is visible from above when the key is attached, a horizontal plate for pressing operation, and a spring locking that is visible from above. A key and a substantially vertical rear end plate having a spring guide surface, the key is disposed from above with respect to the key support member, and is vertically swingable, and one end thereof is a spring lock of the key. Part is visibly locked to the key support member from above, and the other end is also visibly locked to the locking part of the key support member from above, and the key support member and the key are pressed at both ends to lock the key. A keyboard device for an electronic musical instrument, comprising: a compression action return spring that imparts a return habit in a rotation direction. 2. A key having a horizontal plate for depressing operation and a spring locking portion visible from above and a substantially vertical rear end plate having a spring guide surface is mounted on the locking portion of the key supporting member. From the above direction, the compression action return spring that gives the key a turning tendency in the return direction is slid from above along the spring guide surface of the key, and the spring engagement is performed. A method of assembling a keyboard device for an electronic musical instrument, characterized in that the keyboard device is locked to a stop part and the other end is also locked to the lock part of the key support member from above.