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Patent Searching and Data


Title:
KEY SWITCH DEVICE FOR IMPROVING KEY DRAWING FORCE
Document Type and Number:
WIPO Patent Application WO/2018/059600
Kind Code:
A1
Abstract:
A key switch device for improving a key drawing force, comprising a key cap (1), a resetting member, a switch circuit (12), a support bottom plate (15) having an engagement portion, and a scissor leg support (16) having upper and lower engagement portions; the scissor leg support (16) is connected to the key cap (1) and the engagement portion of the support bottom plate (15) by means of the upper and lower engagement portions, respectively; the scissor leg support (16) forms a synchronous linkage support structure by means of force transmissions therebetween, so as to ensure that the key cap (1) moves up and down while remaining parallel to the support bottom plate (15); the key cap (1) is provided with an independent key cap detachment-prevention portion, and the independent key cap detachment-prevention portion is provided with a key yielding space (1h); the scissor leg support (16) is provided with a scissor upper limiting position portion; when the key cap (1) is at the upper limiting position, the key cap detachment-prevention portion limiting engages with the scissor upper limiting position portion, and the scissor upper limiting position portion enters the key yielding space (1h). The key switch device has a wide range of applications in computer keyboards, handheld computers, various embedded keyboards and key switch devices for key-hitting operations.

Inventors:
CHEN, Feng (1-2-305, Jin Sha Xi Shu 88 Jin Ze Lu,Qingyang Distric, Chengdu Sichuan 0, 610000, CN)
Application Number:
CN2017/105198
Publication Date:
April 05, 2018
Filing Date:
October 01, 2017
Export Citation:
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Assignee:
CHEN, Feng (1-2-305, Jin Sha Xi Shu 88 Jin Ze Lu,Qingyang Distric, Chengdu Sichuan 0, 610000, CN)
International Classes:
H01H13/705; H01H3/12
Foreign References:
CN105006395A2015-10-28
CN104658794A2015-05-27
CN102856088A2013-01-02
CN101271791A2008-09-24
CN101315839A2008-12-03
CN103177892A2013-06-26
JP2014212066A2014-11-13
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