JPS5961887A - Keyboard device for electronic musical instruments - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a keyboard device used in various electronic musical instruments such as an electronic organ or an electronic piano.

Conventional configurations and their problems In general, keyboard devices in electronic musical instruments are often configured as shown in Figures 1 and 2. In Figures 1 and 2, various operations are provided behind the keyboard 1. A button 3, a switch 4 operated by the operation button 3, a printed wiring board 6, etc. are arranged on an extra panel 2, and the rear end of the upper surface of the keyboard 1 is provided with a support piece 6a integrally formed with the chassis 6. It is rotatably supported on a fulcrum. The first keyboard is always biased upward by a spring 7, and is configured such that when the keyboard is pressed downward, a switch 8 attached to the keyboard 6 is pressed.

By the way, in a keyboard device configured in this way, it is customary to leave a gap of dimension A between the pile 2 and the keyboard 1, and this dimension A is designed to prevent the panel 2 from warping toward T9' and the keyboard. 1, panel 2, mounting accuracy, etc., are determined. yI! In other words, if dimension A is too large, the inside will be visible and the appearance will be bad; if dimension A is too small, when pile 2 is bent downwards, panel 2 will resemble keyboard 1, and pressed keyboard 1 will return to its original position. There was a problem in that it sometimes produced abnormal noises and that it was very difficult to set the dimensions.

OBJECTS OF THE INVENTION The present invention obviates these conventional drawbacks,
To provide a keyboard device that has a simple configuration and is easy to manufacture and assemble.

Structure of the Invention The present invention provides a support piece that supports the rear end of the upper surface of the keyboard as a fulcrum.
It is constructed so that the front end surface of the Confucian panel comes into contact with it, and according to the present invention, even if the panel curves downward, this can be prevented by the support piece, giving it a good appearance and making it easier to operate the keyboard. It is possible to obtain an excellent keyboard device without any problems.

DESCRIPTION OF EMBODIMENTS FIG. 3 is a cross-sectional side view of an embodiment of the keyboard device of the present invention, and the same reference numerals as in FIGS. 1 and 2 refer to the same symbols as in FIGS. 1 and 2. It shows things.

3, the difference from FIGS. 1 and 2 is that a support piece 6a integrally formed on the chassis 6 is configured to protrude upward by a dimension B from the top surface of the keyboard 1, and in addition, The above-mentioned panel 2 is arranged so that the front end surface of the panel 2 comes into direct contact with the support piece 6a.

With this configuration, the downward warpage of the panel 2 can be completely prevented by the support piece 6a formed integrally with the chassis 6, and therefore the dimension B can be made significantly smaller than the dimension A, resulting in a better appearance. can also be made significantly better.

According to the above-mentioned embodiment, even if the dimension B becomes small, there is no possibility that the keyboard will hit the panel 2, and this has the advantage that no abnormal noise will be generated at all.

Effects of the Invention As is clear from the above embodiments, the present invention has a structure in which a support piece supporting the rear end of the keyboard as a fulcrum protrudes slightly above the top surface of the keyboard so that the front end surface of the panel comes into direct contact with the support piece. It is possible to effectively prevent the panel from warping downward, and it can be made to look good as a whole.Furthermore, it can also prevent the generation of abnormal noise, and the dimensional accuracy is also higher than before. Compared to this, it has the advantage that it can be much rougher and its manufacture and assembly are much easier.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional keyboard device, FIG. 2 is a sectional view of a main part of the same device, and FIG. 3 is a sectional view of a main part of an embodiment of the keyboard device of the present invention. 1...Keyboard, 2...Panel, 3...
・Operation button, 4...Switch, 5...Printed wiring board, 6...Chassis, 6a...Support piece, 7
...Spring, 8...Switch. Name of agent: Patent attorney Toshio Nakao and 1 other person 1st
Figure 2

Claims (1)

[Scope of Claims] A support piece that supports the rear end of the keyboard as a fulcrum protrudes slightly above the second surface of the keyboard, and various operation buttons are provided on the two protruding support pieces at the rear of the keyboard. . A keyboard device for an electronic musical instrument, having the following.