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31.发明授权公开(公告)号：US12237660B2
公开(公告)日：2025-02-25
申请号：US17934552
申请日：2022-09-22
Applicant: Chengli Li
Inventor： Long Chen , Chengli Li , Guolan Yue
Abstract: A leakage current detection and interruption device includes a switch module configured to control electrical connection between input and output ends of power supply lines; a leakage current detection module configured to generate a leakage fault signal in response to a leakage current in the power supply lines; a leakage-responsive drive module configured to drive the switch module to disconnect the electrical connection in response to the leakage fault signal; a fault-responsive drive module configured to drive the switch module to disconnect the electrical connection in response to a fault in the leakage-responsive drive module; and a self-test module configured to generate a self-test signal and to generate a self-test fault signal in response to a fault in the leakage current detection module and/or the leakage-responsive drive module. By providing the fault-responsive drive module, the device can automatically disconnect the electrical power when the leakage-responsive drive module has a fault.
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公开(公告)号：US12119593B2
公开(公告)日：2024-10-15
申请号：US17476236
申请日：2021-09-15
Applicant: Chengli Li
Inventor： Chengli Li , Xiaoming Zhang
IPC: H01R13/70 , H01R13/713 , H01R24/30 , H01R103/00
CPC classification number: H01R13/713 , H01R24/30 , H01R2103/00
Abstract: A power plug with LCDI includes a shell, multiple input insertion prongs partially exposed to an exterior of the shell, a movement assembly disposed in the shell and coupled to the multiple input insertion prongs, a male end assembly and a female end assembly both disposed in the shell, and multiple output conductors. A first end of the male end assembly is connected to the movement assembly and electrically coupled to the multiple input insertion prongs via the movement assembly; a second end of the male end assembly is inserted into a first end of the female end assembly; a second end of the female end assembly is electrically coupled to the multiple output conductors; and the movement assembly is configured to establish or cut off an electrical connection between the multiple input insertion prongs and the multiple output conductors. This power plug improves efficiency of assembly.
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公开(公告)号：US12046893B2
公开(公告)日：2024-07-23
申请号：US17840233
申请日：2022-06-14
Applicant: Chengli Li
Inventor： Chengli Li , Long Chen
Abstract: A leakage current detection and interruption device for power cord includes a switch module, a leakage current detection module, an open circuit detection module, and a trigger module. The switch module controls the electrical connection between input and output ends of the power cord. The leakage current detection module has two leakage current detection lines to collect leakage current on the power supply lines of the power cord. The open circuit detection module is coupled to the leakage current detection module, and generates an open-circuit fault signal when an open circuit exists in at least one of the two leakage current detection lines. The trigger module is coupled to the switch module and the open circuit detection module, and receives a leakage fault signal and/or the open-circuit fault signal, and in response thereto, drives the switch module to disconnect the electrical connection between the input and output ends.
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公开(公告)号：US12027805B2
公开(公告)日：2024-07-02
申请号：US17740098
申请日：2022-05-09
Applicant: Chengli Li
Inventor： Chengli Li , Xiaoming Zhang , Fei Lin
IPC: H01R13/71 , H01R13/713 , H01R13/717
CPC classification number: H01R13/713 , H01R13/7175
Abstract: A power plug includes a shell, input insertion plates, output power lines, a push button on the shell, and a trip assembly inside the shell for controlling electrical coupling between the input insertion plates and output power lines. The trip assembly includes a light emitting element, electrical coupling terminals, and a drive member mechanically coupled to the push button and configured to, in response to a pressing of the push button, control electrical coupling of the electrical coupling terminals, which in turn controls the electrical coupling between the input insertion plates and output power lines. The drive member includes a reflective portion that reflects a part of the light from the light emitting element to the push button as an indicator light. The dual function drive member that accomplishes both mechanical coupling and light transmission reduces the number of components. A device with an electrical control circuit is also disclosed.
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公开(公告)号：US11536777B2
公开(公告)日：2022-12-27
申请号：US17486107
申请日：2021-09-27
Applicant: Chengli Li
Inventor： Chengli Li , Shengyun Nie
Abstract: A power cord for a leakage current detection and interruption device including two insulated power supply lines, two leakage current detection lines for detecting a leakage current on the power supply lines, and two conductor wires. The two leakage current detection lines and the two conductor wires are electrically insulated from each other along the length of the power cord but are electrically connected in series to form a detection current path of a leakage current detection module. The leakage current detection and interruption device further includes a detection monitoring module, coupled in series to the detection current path, for detecting an open circuit condition in the detection current path. The device further includes a switch module and a drive module, which can cut off power supply in response to a detected leakage current or open circuit condition in the detection current path.
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Patent Agency Ranking
公开(公告)号：US10886724B2
公开(公告)日：2021-01-05
申请号：US16412795
申请日：2019-05-15
Applicant: Chengli Li
Inventor： Chengli Li , Yongsen Li , Shengyun Nie
Abstract: A leakage current detection and interruption (LCDI) device for a power cord includes a switch unit configured to control an electrical connection between an input end and an output end, and a leakage current protection unit, which includes a switch drive module and a leakage current detection module. The leakage current detection module includes first and second leakage current detection lines coupled in series. The switch drive module is configured to control the switch unit based on a leakage current signal generated by the leakage current detection module to disconnect the electrical connection. The LCDI device can detect whether the first and second leakage current detection lines are intact, thereby ensuring the reliability of the device.
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公开(公告)号：US10770844B2
公开(公告)日：2020-09-08
申请号：US15808839
申请日：2017-11-09
Applicant: Chengli Li
Inventor： Shengyun Nie , Chengli Li
IPC: H01R13/713 , H01R13/66 , H02H1/00 , H01R13/58 , H01R13/631 , H01R13/506 , H02H3/16 , H01H83/14 , H01H73/44 , H01H83/04 , H02H3/33 , H01H71/58
Abstract: A leakage current protection plug includes a body formed by a top cover and a base, a moving assembly disposed in the body, and output wires. The moving assembly includes a control circuit board, and a detector assembly and a trip assembly disposed on the control circuit board, wherein power input insertion plates and power output moving contact arms are assembled with the moving assembly. Each output moving contact arm is formed integrally and fixed to the detector assembly, and the output ends of the output moving contact arms are directly connected to the output conductor wires. The device has a simple overall structure and can be reliably assembled. By using integrally formed output moving contact arms to directly couple the input and output, it improves the accuracy of the leakage current detection parameters, reduces internal transfers and solder points, and reduces the size and cost of the plug.
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公开(公告)号：US10557883B2
公开(公告)日：2020-02-11
申请号：US15718661
申请日：2017-09-28
Applicant: Chengli Li
Inventor： Chengli Li , Shengyun Nie
Abstract: A power cord leakage current detection and protection device, including a switch unit configured to control an electrical connection between an input end and an output end of the device; a leakage current protection unit, which includes a switch drive module and a leakage current detection module, the switch drive module configured to control the switch unit based on a leakage current signal detected by the leakage current detection module, wherein the leakage current detection module includes a leakage current detection line configured to detect whether a leakage current is present on a first power supply line and/or a second power supply line, and a signal feedback line configured to detect whether the leakage current detection line has an open circuit; and a test unit, including a test switch, coupled to the a leakage current protection unit, wherein when the test switch is closed, the switch drive module controls the switch unit based on a signal on the signal feedback line.
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公开(公告)号：US10170265B2
公开(公告)日：2019-01-01
申请号：US15592674
申请日：2017-05-11
Applicant: Chengli Li
Inventor： Chengli Li , Fei Lin
Abstract: A leakage current protection device includes an electrical and mechanical assembly which includes: a circuit board; moving contact plates; an auxiliary switch; a reset shaft, having a hook in its lower portion, a bottom end of the reset shaft being set against one end of a reset spring, another end of the reset spring being set against the base; a disconnect mechanism, having a hook at its upper portion to engage with the hook of the reset shaft in a vertical direction; a trip coil and a trip plunger disposed on a side of the disconnect mechanism, where the disconnect mechanism is driven by the trip plunger to move horizontally. The disconnect mechanism further includes a pushing end that controls the auxiliary switch and lifting levers that control the moving contact plates.
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40.发明授权公开(公告)号：US09713273B2
公开(公告)日：2017-07-18
申请号：US14302685
申请日：2014-06-12
Applicant: Chengli Li
Inventor： Chengli Li , Fei Lin , Xiaoming Zhang
CPC classification number: H05K5/0213 , H02H9/005
Abstract: This invention provides a fireproof separator board, which is made of a flame-retardant, high temperature resistant material and disposed within an insulating casing of an electrical device, for preventing the heat generated by the electrical components of the electrical device from being conducted to the insulating casing. This invention also provides a plug-based circuit interrupter that includes the fireproof separator board. The fireproof separator board and the plug-based circuit interrupter of this invention can effectively prevent high temperature and fire caused by the electrical components that could melt the casing.
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