JPH02148096A - Integrated keyboard and its manufacture - Google Patents

Abstract

PURPOSE:To reduce the manufacturing cost of a keyboard by bringing plural white keys and plural black keys to unified molding simultaneously by the same molding tool, and attaching simply plural respective white keys and black keys to a keyboard chassis in a state that each white key and black key is positioned correctly. CONSTITUTION:In an integrated keyboard, plural white keys 1 and black keys 2 of a one octave portion C-SC are connected on their base end parts 1a, 2a side and formed as one body by two-color forming. At the time point when molding of this integrated keyboard, each white key 1 is in an erected state that the push key face 1b is positioned upward, each black key 2 is in an inverted state that the push key face 2b is positioned downward, and also, on the plane, each white key 1 and each black key 2 are placed in a state that they are opposed to its base end parts 1a, 2a to each other. Also, each white key 1 and each black key 2 are connected by band-like parts 4, 5 connected by a thin wall part 3, respectively, and the base end part 1a of each white key 1 and the base end part 2a of each black key 2 are coupled to the band-like parts 4, 5 through thin wall parts 6, 7.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to electronic w! , relates to an integrated keyboard used as a keyboard for a keyboard instrument such as a keyboard instrument, and a method for manufacturing the same.

[Prior art and its problems] In electronic keyboard instruments such as electronic pianos, electronic organs, and electronic synthesizers, the keyboard is a so-called integrated key formed by integrally molding a plurality of white keys or black keys corresponding to one octave, for example. It is known that it was formed by In this case, the integral internal key formed by integrally molding a plurality of white keys and the integral black key formed by integrally molding a plurality of black keys are each individually attached to the keyboard chassis with bolts or the like.

By the way, the keyboard formed of the integral inner key and the integral black key is much easier to assemble than the keyboard formed of the white key and the black key, which are molded individually. It is suitable for leftover use, but since the integral white key and the integral black key are molded separately, a dedicated mold for molding the integral white key and a dedicated mold for molding the integral black key are required. At the same time, it requires a separate molding process for the integrated white key and the integrated black key using special molds, and the integrated white key and integrated black key are individually molded! ! The work of attaching the keyboard to the board chassis is also troublesome, and there is also the problem that it is difficult to position the plurality of white keys and the plurality of black keys relative to each other.

[Object of the invention] This invention was made in view of the above circumstances, and
The purpose of this is to be able to simultaneously mold multiple white keys and multiple black keys using the same mold, and to easily attach multiple integrally molded white keys and multiple black keys to the keyboard chassis. To provide an integrated keyboard that allows the white keys and black keys to be played with their positions correctly set, and a method for manufacturing an integrated wl board that allows the integrated keyboard to be simply and easily produced. It is in.

[Summary of the Invention] In order to achieve the above object, the integrated keyboard of the invention described in claim (1) has a plurality of white keys and a plurality of black keys connected at their base ends. The key point is that it is integrally molded.

Further, the method for manufacturing an integrated keyboard according to the invention described in claim (2) is such that a plurality of white keys and a plurality of black keys are arranged so that the white keys are arranged in parallel with each other and the black keys are arranged in the same manner as each other on the screen. are arranged with their base ends facing each other, and the white keys and the black keys are individually connected at their base ends, and are connected via a thin wall part. integrally molded, and after the molding, the thin parts between the white keys and the black keys are bent so that the white keys and the black keys are substantially flush with each other; The main point is that they are installed side by side.

[Example] Hereinafter, an example of the present invention will be described specifically and in detail based on the drawings.

FIGS. 1(a) and 1(b) show a plan view and a front view of an integrated m-board according to an embodiment.

This integrated keyboard has a plurality of white keys 1 and a plurality of black keys 2 for l octave (C-SC), and their base ends 1a, 2a.
They are integrally molded using two-color molding so that they are connected at the sides. Such a body keyboard is in the state shown in FIGS. 2(a), (b) and 3 at the time of completion of molding. That is, each white key l is in an erect state with its key surface 1b facing upward, and each black key 2 is in an inverted state with its key surface 2b positioned at C. key l
The black keys 2 are arranged with their proximal ends 1a and 2a facing each other. And each white w11
and each black w, 2 are individually connected by a band-shaped portion 4.5 connected by a thin wall portion 3.

In addition, the base end 1a of each white key l and the base end 2 of each black @2
a is connected to the strip 4.5 via a thin wall 6.7.

On the do side of each white key 1 and each black key 2, there is a cross-shaped suppression protrusion 1c for performing a switch operation when the key is pressed.
2C, and L-shaped hooks 1d and 2 as stoppers that engage with the keyboard chassis and regulate the -L limit during key release operations.
d are integrally formed. In addition, the strip portion 4.5 that connects each white key 1 and each black key 2 has a plurality of bolt insertion holes 8.9 for fixing this integrated keyboard to the keyboard chassis with bolts, and a plurality of white Multiple black fi for key l
A plurality of retaining parts 10.11 are provided for positioning 2. One of these retaining parts 10 and 11 (retaining part 10) has a concave shape, and the other (retaining part 11) has a convex shape, and the thin part 3 is bent at the broken line position,
When the strips 4.5 are superimposed, they fit together. Due to the engagement of the engaging portions 10.11, each black key 2 is connected to t! It is positioned at a predetermined position between 11 and 11.

Next, -1- a method of manufacturing the integrated keyboard will be described. This integrated keyboard is first constructed as shown in Figures 2 (a) and (b) mentioned above.
) and as shown in FIG. 3, a plurality of white keys 1 and a plurality of black keys 2 are molded into one body. After the integral keyboard molded in this way, as shown in FIGS. 1(a) and 1(b), the thin wall portion 3 is bent at the position of the broken line, and each white key 1 and each black key 2 are placed in the same position. (At this time, each engaging portion 10.11 engages as shown in FIG. 4, and each black key 2 is positioned between each white key 1.) ), an integrated keyboard is obtained that is in the state of forming a keyboard.

However, the single disc manufactured in this way was the fifth
As shown in the figure, it is fixed to the keyboard chassis 12 by a plurality of holes 13 inserted into the respective bolt insertion holes 8.9 of the overlapping strips 4.5. In this case, the hooks 1d and 2d of each white key 1 and each black key 2 come into contact with a locking wall 12a provided on the keyboard chassis 12. Such a white keysmith and black tI! 2 is a thin wall portion 6.
7 as a fulcrum, and when the key is released, the spring force of the thin section 6.7, which functions as a resin spring, moves it to the initial position (see Fig. 1).
b) Return to rotation. When the white key l and the black key w12 are pressed, the respective pressing protrusions lc and 2c are pressed against rubber switches (not shown) as means for instructing the start of musical tone generation, which are arranged on the keyboard chassis 12 and correspond to the 6 keys. ) to turn it on.

In the case of the above example, a plurality of white Il are formed by two-color molding.
1 and a plurality of black keys 12 are integrally molded (in this case, the thin part 3 is the same color as the black key 2), but the black key 2 is also molded in white at the time of molding, and the surface of the black key 2 is plated etc. after molding. In some cases, a black layer is formed.

Further, the integrated keyboard of the embodiment described in "-" is one in which a plurality of white keys 1 corresponding to one octave and a plurality of black keys 12 are integrally molded, but a plurality of white keys 1 corresponding to 2 octaves and 3 octaves are integrally formed. and a plurality of black keys 2 may be integrally molded.

[Effect of the invention 1 As explained above, according to the integrated keyboard of the invention described in claim (1), a plurality of white keys and a plurality of black keys can be integrally molded at the same time using the same mold. Moreover, since multiple white keys and multiple black keys can be easily attached to the keyboard chassis with the white keys and black keys correctly positioned relative to each other, the manufacturing cost of the keyboard can be significantly reduced. There are advantages.

Moreover, the invention described in claim (2) is integrated! Il
According to the manufacturing method of i, it is possible to easily manufacture 11 integral keys formed by integrally molding a plurality of white keys and a plurality of black keys by simply bending the keys after molding.

Key, 3... Thin wall part, 4.5... Band-shaped part (connecting part).

Claims (2)

[Claims] (1) An integrated keyboard characterized in that a plurality of white keys and a plurality of black keys are integrally molded so that they are connected at the base end side. (2) A plurality of white keys and a plurality of black keys are arranged such that the white keys and the black keys face each other on a plane, and the white keys and integrally molded so that the black keys are individually connected at their respective base ends and are connected via a thin wall part,
After the molding, the thin parts between the white keys and the black keys are bent, so that the white keys and the black keys are arranged side by side so that they are substantially flush with each other. A method for manufacturing an integrated keyboard characterized by: