The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 13, 2018
Filed:
Jan. 14, 2018
Darfon Electronics (Suzhou) Co., Ltd., Suzhou, Jiangsu Province, CN;
Darfon Electronics Corp., Taoyuan, TW;
Rui-Ming Liao, Taoyuan, TW;
Chih-Chung Yen, Taoyuan, TW;
Hung-Chieh Lo, Taoyuan, TW;
Chia-Hung Liu, Taoyuan, TW;
DARFON ELECTRONICS (SUZHOU) CO., LTD., Suzhou, Jiangsu Province, CN;
DARFON ELECTRONICS CORP., Taoyuan, TW;
Abstract
A keyswitch uses a combination of springs connected in serial for providing a return force to a keycap of the keyswitch. When the keycap moves toward a base of the keyswitch beyond a transition position, one of the springs stops continuously deforming. It leads to an increment of the elastic coefficient of the combination of springs and an increment of the elastic stored energy by the combination of springs. Therefore, during a pressing on the keycap, the keycap can provide a light force feedback and then a heavy force feedback to a user. Further, the keyswitch can use a switch with a lateral motion, which can reduce influence of a resilient force produced by the switch on the up and down movement of the keycap. The keyswitch also can use an elastic piece disposed beside the keycap, which can provide a tactile feedback to the user.