JPH0395530U

JPH0395530U -

Info

Publication number: JPH0395530U
Application number: JP525390U
Authority: JP
Priority date: 1990-01-23
Filing date: 1990-01-23
Publication date: 1991-09-30

Description

[Brief explanation of drawings]

第１図は、本考案のメンブレンキーボードスイ
ツチの非操作時の断面図、第２図は、同実施例の
操作途中の断面図、第３図は、同実施例の押し切
つた状態の断面図、第４図は、本考案の板ばねの
拡大斜視図、第５図は、第４図のＡ−Ａ線の断面
図、第６図は、板ばねの他の実施例の断面図、第
７図は、本考案の押圧荷重と変位量の関係を示す
グラフ、第８図、第９図は、従来のメンブレンキ
ーボードスイツチの断面図である。１……ベースプレート、５……メンブレンスイ
ツチ、６……ハウジング、６ｂ……垂直壁、７…
…キーステム、８……キートツプ、９……コイル
ばね、１０……板ばね、１０ａ……起立部、１０
ｃ……屈曲部、１０ｄ……傾斜部、１０ｅ……摺
動部、１０ｆ……アール部。 Fig. 1 is a cross-sectional view of the membrane keyboard switch of the present invention when it is not operated, Fig. 2 is a cross-sectional view of the same embodiment during operation, and Fig. 3 is a cross-sectional view of the same embodiment in the fully pushed state. , FIG. 4 is an enlarged perspective view of the leaf spring of the present invention, FIG. 5 is a sectional view taken along line A-A in FIG. 4, and FIG. 6 is a sectional view of another embodiment of the leaf spring. FIG. 7 is a graph showing the relationship between the pressing load and the amount of displacement according to the present invention, and FIGS. 8 and 9 are cross-sectional views of a conventional membrane keyboard switch. DESCRIPTION OF SYMBOLS 1... Base plate, 5... Membrane switch, 6... Housing, 6b... Vertical wall, 7...
... Key stem, 8 ... Key top, 9 ... Coil spring, 10 ... Leaf spring, 10a ... Standing part, 10
c...Bending part, 10d...Slanted part, 10e...Sliding part, 10f...Rounded part.

Claims

[Claims for Utility Model Registration] (1) A membrane switch disposed on a base plate, a housing covering the membrane switch, a key stem that slides up and down within the housing, and a key stem disposed at the bottom of the key stem. a coil spring and a generally V-shaped leaf spring that engages the key stem; the V-shaped leaf spring engages the lower end of the key stem to push the key stem upward when the key stem is in an upward position; A membrane keyboard switch characterized in that when the key stem is located downward, it is removed from the lower end of the key stem and a coil spring presses the membrane switch. (2) The V-shaped leaf spring has an upright portion that is in contact with the inner surface of a vertical wall in the housing, a bent portion that is bent from the top of the upright portion, an inclined portion that is inclined downward from the bent portion, and 2. The membrane keyboard according to claim 1, wherein the membrane keyboard comprises a sliding part extending from a tip of the sloping part at an angle close to horizontal and having a rounded part at the tip, and the sliding part engages with a lower part of the key stem. Switch. (3) The membrane keyboard switch according to claim 1, wherein the rounded portion is formed to protrude upward.