Title:
LIGHT GUIDE TYPE PRESS-KEY SWITCH
Document Type and Number:
WIPO Patent Application WO/2020/211267
Kind Code:
A1
Abstract:
Disclosed is a light guide type press-key switch, comprising a key base and an upper cover. The key base is snap-fitted with the upper cover and assembled to form a housing. The housing is provided with an accommodating recess. A PCB circuit board is fixedly provided on the bottom of the key base, and a connection hole is provided in the center of the bottom of the key base. A first connection hole is provided at the position of the PCB circuit board aligned with the connection hole. The upper cover is provided with through guide grooves. The switch also comprises a key shaft that is movably embedded in the accommodating recess. A reset spring that is movably connected to the key base is sleeved on the central shaft of the key shaft. The key shaft can reciprocate in the vertical direction in the accommodating recess by pressing a key cap base provided at the top of the key shaft. The bottom end of the PCB circuit board is also provided with a transmitting device for emitting light source and a receiving device for receiving the light source. The transmitting device and the receiving device are disposed at positions close to the first through hole and facing each other. The vertical reciprocating movement of the key shaft can drive the central shaft to block the light source emitted by the transmitting device, and the receiving device senses that the light source is blocked, such that the turn-on of a press-key is triggered.
Inventors:
YANG XIAOFENG (CN)
ZHU JING (CN)
ZHU JING (CN)
Application Number:
PCT/CN2019/105005
Publication Date:
October 22, 2020
Filing Date:
September 10, 2019
Export Citation:
Assignee:
DONGGUAN JINGYANG ELECTRONICS AND TECH CO LTD (CN)
International Classes:
H01H13/10; H01H13/02; H01H13/04
Foreign References:
| CN206775481U | 2017-12-19 | |||
| CN207458812U | 2018-06-05 | |||
| CN205594586U | 2016-09-21 | |||
| CN208298737U | 2018-12-28 |
Attorney, Agent or Firm:
DONG GUAN SHI SHENZHOU ZHONGDA PATENT AND TRADEMARK AGENCY (CN)
Download PDF: