Title:
OPTICAL SWITCH KEYBOARD
Document Type and Number:
WIPO Patent Application WO/2023/103496
Kind Code:
A1
Abstract:
Disclosed in the present utility model is an optical switch keyboard, comprising a PCB, several key switches arranged on the PCB, and several groups of light conduction assemblies arranged corresponding to the several key switches on a one-to-one basis, wherein each light conduction assembly comprises an infrared transmitting element and a photosensitive receiving element which are arranged opposite each other; and each key switch is provided with a light blocking shaft for blocking light between the infrared transmitting element and the photosensitive receiving element. The optical switch keyboard is characterized in that the lower surface of the PCB is provided with several light blocking covers which correspond to the several groups of light conduction assemblies on a one-to-one basis. The optical switch keyboard provided in the present utility model overcomes the defects of the working performance being unstable and being prone to short circuiting due to abrasion caused by long-term contact of contacts between a positive elastic piece and a negative elastic piece in each key switch in existing mechanical keyboards. In addition, the optical switch keyboard achieves the aims of preventing optical crosstalk, preventing signal interference, and being dustproof and waterproof, thereby facilitating an improvement in the accuracy of turning on and off the key switches on the keyboard.
Inventors:
WU FUXI (CN)
HU YUANFENG (CN)
HU YUANFENG (CN)
Application Number:
PCT/CN2022/117714
Publication Date:
June 15, 2023
Filing Date:
September 08, 2022
Export Citation:
Assignee:
DONGGUAN CITY KAIHUA ELECT CO LTD (CN)
International Classes:
H03K17/969
Foreign References:
| CN216873184U | 2022-07-01 | |||
| CN217037159U | 2022-07-22 | |||
| CN106877853A | 2017-06-20 | |||
| CN106877855A | 2017-06-20 | |||
| CN211742992U | 2020-10-23 | |||
| CN109921773A | 2019-06-21 | |||
| US5684513A | 1997-11-04 |
Attorney, Agent or Firm:
BEIJING XINGZHI XIANGDA INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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