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1. (WO2018035969) ELECTROMAGNETIC AUTOMATIC-RESET LIMIT SWITCH

Pub. No.:    WO/2018/035969    International Application No.:    PCT/CN2016/104351
Publication Date: Fri Mar 02 00:59:59 CET 2018 International Filing Date: Thu Nov 03 00:59:59 CET 2016
IPC: H01H 3/16
Applicants: CAI, Xuqiang
蔡旭强
Inventors: CAI, Xuqiang
蔡旭强
WU, Haiyan
伍海燕
DONG, Qing
董青
Title: ELECTROMAGNETIC AUTOMATIC-RESET LIMIT SWITCH
Abstract:
An electromagnetic automatic-reset limit switch comprises a base (1) and an upper lid (2) engaged thereon. The base (1) and the upper lid (2) form a hollow cavity, in which a switch box (8) is provided. The switch box (8) is provided with a transmission rod (26) passing therethrough. The transmission rod (26) has one end thereof connected within a pushing rod (11), and the other end thereof connected to a button (28) provided so as to pass through the base (1). A sliding block and a sliding block positioning block (13) are individually provided in the switch box (8). An electromagnetic core (27) provided so as to pass through an electromagnetic coil (23) is connected between the button (28) and the transmission rod (26). A front contact terminal (16) and a back contact terminal (17) are individually provided in the switch box (8). The sliding block is provided with moving contacts (18) capable of respectively coming into contact with the front contact terminal (16) and the back contact terminal (17). One end of the pushing rod (11) faces the sliding block. In the solution, an external force triggers the button (28), and the electromagnetic coil (27) is driven to move the pushing rod (11) on the inside to cause the internal contacts (18, 15) to be disconnected. Upon resetting, the electromagnetic coil (23) is powered, and the electromagnetic coil (27) is rebounds under the effect of a magnetic field to cause the contacts (18, 15) to be connected, thereby realizing an automatic reset function.