公开(公告)号：US10931095B1

公开(公告)日：2021-02-23

申请号：US16564857

申请日：2019-09-09

Applicant: Chengli Li

Inventor： Chengli Li ,  Long Chen ,  Shengyun Nie

IPC: H02H3/33 ,  H02H3/32 ,  H02H3/04 ,  H02H1/00

Abstract: A relay-type leakage current protection device includes a switch circuit, a relay circuit, a leakage current detection circuit, a self-test circuit, and a drive circuit. The switch circuit controls electrical connection between input and output ends of the power supply. The relay circuit is coupled to the input end and controls the open/close state of the switch circuit. The leakage current detection circuit detects a leakage current on the power supply lines. The self-test circuit is coupled to the power supply lines and the leakage current detection circuit, to generate a self-test pulse signal which simulates the leakage current and to detect a fault condition in the leakage current detection circuit. The drive circuit drives the relay circuit in response to receiving a leakage current signal from the leakage current detection circuit or a fault signal from the self-test circuit.

公开(公告)号：US10770823B1

公开(公告)日：2020-09-08

申请号：US16446107

申请日：2019-06-19

Applicant: Chengli Li

Inventor： Chengli Li ,  Xiaoming Zhang ,  Shengyun Nie

IPC: H01R13/44 ,  H01R13/453 ,  H01R25/00

Abstract: A safety shield assembly for a power receptacle and a power receptacle incorporating the same. The safety shield assembly includes a frame and a sliding block and a resilient member disposed in the frame. The frame has multiple openings corresponding to multiple socket holes of the power receptacle, a position limiting member configured to abut the sliding block, and a balancing support member. In its initial state, the resilient member urges the sliding block to a closed position to covers the openings. The sliding block has two inclined surfaces. When an inserted object pushes on only one of the two inclined surfaces, the position limiting member limits the sliding motion of the sliding block; when two inserted objects simultaneously push on both inclined surfaces, the sliding block is balanced on the balancing support member and is able to slides along the frame to expose the openings.