Push-button key cover and producing method thereof

A technology of electric keys and buttons, which is applied in the direction of circuits, electric switches, and electrical components, and can solve problems such as disc-shaped metal spring position deviation, lower click rate, and peak load increase

Inactive Publication Date: 2005-03-09
SHIN-ETSU POLYMER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the disc-shaped metal spring 104 is deformed through a thin-walled part of the cover 100, such as a part with a thickness of 0.1mm-0.3mm, to produce a click feel in the cover shown in FIG. 1, the hardness of the cover 100 increases. will tend to cause the cover to crack due to repeated deflection, resulting in a reduction in the key life of the cover 100
[0009] In addition, the inventors have found that when the disc-shaped metal is bonded to the pressing protrusion by an elastic adhesive, if the amount of the elastic adhesive is not enough, the push-button key cover causes a load relative to the load during the key operation. Increased stroke; and if the amount is too much, it will cause the stroke to decrease, thereby reducing the click rate, resulting in a decrease in bond life and working life
Also, it will cause the disc metal spring set by the adhesive to tilt, causing the position shift of the disc metal spring in the X-Y direction
For example, when the position is shifted by 0.1mm or more, the peak load increases, resulting in a significant decrease in bond life and a decrease in click rate

Method used

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  • Push-button key cover and producing method thereof
  • Push-button key cover and producing method thereof
  • Push-button key cover and producing method thereof

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Embodiment Construction

[0042] Refer below Figures 1A-13C The present invention is described wherein like reference numerals designate like or corresponding parts throughout.

[0043] First refer to Figures 1A-1C , describing an embodiment of a push-button key cover according to the present invention. A push-button key cover of the illustrated embodiment, generally indicated by the reference numeral 4, includes a cover or base layer 1 with key tops 2 formed on a front surface of the cover or base layer. Each key top 2 includes a display portion (not shown) such as a letter, a symbol, and the like. On the rear surface of the cover sheet 1 is formed a pressing protrusion 3 in such a manner that its position corresponds to that of the key top 2 . The push-button key cover 4 also includes disc-shaped metal springs 5 ​​arranged to correspond to the pressing protrusions 3 , respectively. Each disc-shaped metal spring 5 is arranged in such a manner that it abuts against a corresponding central portion...

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Abstract

A push button switch cover capable of enhancing positional accuracy between a cover sheet and dish-shaped metal springs, thereby highly improving keying characteristics and reducing manufacturing cost. The cover sheet is provided on a front surface thereof with key tops and on a rear surface thereof with pressing projections in correspondence to the key tops. The dish-shaped metal springs are each bonded to a respective one of the pressing projections by an elastic adhesive section while keeping an apex of the dish-shaped metal spring abutted against a central portion of the pressing projection.

Description

technical field [0001] The present invention relates to a cover for a push-button key used as a data input device or a key device for a mobile communication device such as a mobile phone, a car phone, etc., a measuring instrument, a remote controller, a portable terminal, etc., and also for a It is used as an input device for home appliances, electronic equipment, communication equipment, etc. More particularly, the present invention relates to a push-button key cover that allows a push-button key to have improved keying characteristics, such as reduced travel characteristics, increased click characteristics, and the like. Background technique [0002] now attached Figure 14 A conventional push-button key for an input device of a mobile phone or the like is described. The push-button key includes a cover 100 accommodated in a housing of a device or telephone, while the cover is mounted on a circuit board 102 via a disc spring 104 made of metal such as phosphor bronze, SUS ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H13/04H01H13/14H01H13/48H01H13/70
CPCH01H13/14Y10T29/49128Y10T29/49105H01H13/48H01H2205/024Y10T29/49126H01H2215/036H01H13/7006Y10T29/4913H01H2205/002Y10T29/49002Y10T29/49147
Inventor 安藤均白泽健夫大岛富美男清泽永义佐藤博英
Owner SHIN-ETSU POLYMER CO LTD
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