JPS6166397U

JPS6166397U -

Info

Publication number: JPS6166397U
Application number: JP14953184U
Authority: JP
Priority date: 1984-10-04
Filing date: 1984-10-04
Publication date: 1986-05-07
Also published as: JPH0322789Y2

Description

[Brief explanation of drawings]

第１図〜第６図はこの考案の一実施例を示した
もので、第１図および第２図は鍵盤装置の正面図
および底面図、第３図は鍵盤装置の縦断正面図、
第４図は第１図のＡ−Ａ線に沿う断面図、第５図
は復帰バネの斜視図、第６図はフレームに対する
鍵の枢支構造を示す分解斜視図である。第７図お
よび第８図はそれぞれこの考案の他の実施例を示
す鍵盤装置の一部切開正面図である。第９図は従
来の鍵盤装置の縦断正面図である。第１０図は復
帰バネとしてコイルバネを用いた場合と板バネを
用いた場合との鍵の押し下げストローク／押し下
げ荷重特性図である。１１…フレーム、１２…鍵、１４…バネ当接部
兼用ストツパ、１６…スイツチ、１９…バネ受金
具、２０…復帰バネ、２１…基体部、２２…板バ
ネ部、４０…バネ受板、４１…バネ受け孔、４２
…バネ当接部、４３…バネ受部、４４…バネ受け
板、４５…鍵押上げ板。 Figures 1 to 6 show an embodiment of this invention; Figures 1 and 2 are front and bottom views of the keyboard device; Figure 3 is a longitudinal sectional front view of the keyboard device;
4 is a sectional view taken along the line A-A in FIG. 1, FIG. 5 is a perspective view of the return spring, and FIG. 6 is an exploded perspective view showing the pivot structure of the key relative to the frame. 7 and 8 are partially cutaway front views of a keyboard device showing other embodiments of this invention, respectively. FIG. 9 is a longitudinal sectional front view of a conventional keyboard device. FIG. 10 is a key depressing stroke/depressing load characteristic diagram when a coil spring is used as the return spring and when a plate spring is used as the return spring. DESCRIPTION OF SYMBOLS 11... Frame, 12... Key, 14... Stopper also serving as spring contact part, 16... Switch, 19... Spring receiver, 20... Return spring, 21... Base part, 22... Leaf spring part, 40... Spring receiver plate, 41 ...Spring receiving hole, 42
...Spring contact part, 43... Spring receiving part, 44... Spring receiving plate, 45... Key pushing plate.

Claims

[Scope of utility model registration request]

In a keyboard device for an electronic musical instrument, the keyboard device includes a key whose base end is pivotally supported on a frame, a switch that is turned on when the key is pressed down, and a return spring that returns the key. The base portion of the return spring shall consist of a base portion along the length direction of the base portion, and a leaf spring portion along the length direction of the base portion and integrally connected to the base end side of the base portion at the base end, and the base portion of the return spring. One end and the tip of the leaf spring part are locked to a spring receiver provided on the frame in a state where the leaf spring part is curved in an arc shape with the central part floating, and the other end part of the base part is locked to the spring receiver provided on the frame. A keyboard device for an electronic musical instrument, characterized in that the key is slidably abutted in the longitudinal direction of the lower surface of a spring abutting portion provided on the key, and the key is pressed upward by the spring force of the leaf spring.