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公开(公告)号：US20230071911A1
公开(公告)日：2023-03-09
申请号：US17715513
申请日：2022-04-07
Applicant: Chengli LI
Inventor： Chengli LI , Xiaoming ZHANG , Shengyun NIE
IPC: H01R13/53 , H01R13/713
Abstract: A power plug with leakage current detection and protection interrupter and arc protection includes: a shell, a trip assembly disposed within the shell, a cable connector electrically coupled to the trip assembly, and an arc protection shield disposed between the trip assembly and the shell. The trip assembly includes a switch having input and output contact terminals. The arc protection shield is configured to isolate the input and output contact terminals of the switch from the shell. The arc protection shield includes one or more arc blocking baffles, each disposed near corresponding input and output contact terminals, so as to isolate the contact terminals from the shell. By providing the arc protection shield between the input and output contact terminals and the shell, the shell is protected from arcs formed at the input and output contact terminals due to connection and disconnection operations. This prevents damage to the shell and improves user experience and safety.
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公开(公告)号：US20230009042A1
公开(公告)日：2023-01-12
申请号：US17388856
申请日：2021-07-29
Applicant: Chengli LI
Inventor： Chengli LI , Shengyun NIE
Abstract: A power cord includes multiple current-carrying wires covered by an outer insulating layer, each wire including a current-carrying conductor covered by an insulating layer. At least one wire further includes a shield layer covering the insulating layer and a metal conductor between the insulating layer and the shield layer. The shield layer is formed of a band wound around the metal conductor and insulating layer. The outward-facing surface of the band is insulating; the inward-facing surface has one or more conductive regions and one or more insulating regions. One insulating region is located along a longitudinal trailing edge of the band. Consecutive turns of the band partially overlap each other; the trailing edge of a subsequent turn is disposed over part of a previous turn. The structure ensures effective insulation of the metal conductor from other components. The power cord is used in a leakage current detection and interruption device.
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公开(公告)号：US20220416484A1
公开(公告)日：2022-12-29
申请号：US17368813
申请日：2021-07-06
Applicant: Chengli LI
Inventor： Chengli LI , Xiaoming ZHANG , Shengyun NIE
IPC: H01R13/717 , F21V23/00 , F21V8/00 , F21V23/04 , H01R13/66
Abstract: A leakage current protection device with an illumination function, including a shell, a movement assembly in the shell, power input and output assemblies coupled to the movement assembly, and an illumination assembly disposed inside the shell, which includes: an illumination control board electrically coupled to the power input or output assembly; a sensing unit coupled to the illumination control board and configured to sense an ambient condition outside the shell to generate a sensing output signal; a light emitting unit coupled to the control board, and controlled by the control board to turn on or off in response to the sensing output signal; and a light guide unit, formed by an operating element partially protruding out of the shell and disposed adjacent the light emitting unit, configured to guide the illumination light emitted by the light emitting unit out of the shell. The device is convenient to use and compact.
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公开(公告)号：US20220011378A1
公开(公告)日：2022-01-13
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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公开(公告)号：US20210118869A1
公开(公告)日：2021-04-22
申请号：US16670808
申请日：2019-10-31
Applicant: Chengli LI
Inventor： Chengli LI , Shengyun NIE
Abstract: A leakage current detection and protection device coupled between input and output ends of power lines, and includes first and second switching modules, a leakage current detection module, a self-test module, and first and second drive modules. When the leakage current detection module detects a leakage current on the power lines, the second drive module controls the second switching module to disconnect power to the output end. When the self-test module detects a fault in the leakage current detection module, the first drive module controls the first switching module to disconnect the power to the output ends. The first switching module is coupled between the input end and a point where the leakage current detection module, the self-test module, and the first and second drive modules are coupled, so that these modules are de-powered when the first switching module disconnects the electrical connection to output ends.
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Patent Agency Ranking
公开(公告)号：US20210239770A1
公开(公告)日：2021-08-05
申请号：US17238693
申请日：2021-04-23
Applicant: Chengli LI
Inventor： Chengli LI , Shengyun NIE
Abstract: A power supply cord for use with a leakage current detection and interruption device, including at least two power supply lines, at least two insulating layers respectively covering the at least two power supply lines, at least two shield lines respectively covering the at least two insulating layers, and at least one insulating structure covering at least one of the at least two shield lines to electrically insulate the at least two shield lines from each other. By providing the insulating structure outside of at least one of the shield lines, the shield lines of different power supply lines are independent of each other, so that the shield lines can better detect leakage currents in the power supply lines.
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公开(公告)号：US20210225606A1
公开(公告)日：2021-07-22
申请号：US16789283
申请日：2020-02-12
Applicant: Chengli LI
Inventor： Chengli LI , Xiaoming ZHANG , Shengyun NIE
IPC: H01H71/24 , H01H71/32 , H01H71/12 , H01H71/52 , H01H83/04 , H01H83/20 , H01H73/44 , H01H73/20 , H01H73/08 , H02H3/16
Abstract: A leakage current protection device includes a shell and a core assembly disposed within the shell. The core assembly includes a control circuit board, a trip assembly disposed on the control circuit board, and an input end and an output end connected to the trip assembly. The trip assembly includes a first driving member movable linearly in a first direction and a second driving member pivotable around a pivotal support axis, where the first and second driving members are mechanically engaged with each other and move together with each other. The second driving member has two driving points configured to move in a second direction as the second driving member pivots, the second direction being non-parallel to the first direction. Movements of the two driving points of the second driving member in the second direction are operable to electrically connect or disconnect the input and output ends.
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公开(公告)号：US20210075211A1
公开(公告)日：2021-03-11
申请号：US16564857
申请日：2019-09-09
Applicant: Chengli LI
Inventor： Chengli LI , Long CHEN , Shengyun NIE
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.
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公开(公告)号：US20250007272A1
公开(公告)日：2025-01-02
申请号：US18218189
申请日：2023-07-05
Applicant: Chengli LI
Inventor： Chengli LI , Shengyun NIE
Abstract: A leakage current detection and interruption (LCDI) device includes a leakage current detection module, including first and second leakage current detection lines, a signal line, and at least one resistive element and/or at least one semiconductor element, configured to detect a leakage current signal on the first or second current-carrying line and to generate a leakage fault signal in response thereto. The first and second leakage current detection lines are electrically insulated from each other, and respectively cover one of the first and second current-carrying lines. A point at which the first and second leakage current detection lines are coupled to each other is coupled to the signal line, to form respective current paths with the signal line, for detecting an open circuit fault in the leakage current detection module. The at least one resistive element and/or the at least one semiconductor element is coupled in the current paths.
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公开(公告)号：US20180331465A1
公开(公告)日：2018-11-15
申请号：US15847896
申请日：2017-12-19
Applicant: Chengli LI
Inventor： Chengli LI , Shengyun NIE
IPC: H01R13/533 , H01R11/07 , H01R13/629 , H01R13/627
CPC classification number: H01H71/10 , H01H71/0264 , H01H71/04 , H01H71/08 , H01R11/07 , H01R13/533 , H01R13/6275 , H01R13/62916
Abstract: A power plug with leakage current protection device, which includes a body formed of an upper cover and a base, a core assembly disposed in the body, a cable assembly attached to the body, a plurality of input insertion plates and output moving contact arms which are assembled with the core assembly, and an insertion plate sleeve disposed on the base, where the input insertion plates pass through the insertion plate sleeve to protrude from the base. The insertion plate sleeve is made of an insulating and temperature resistant material. The power plug has a simple overall structure and can be assembled easily and reliably. It can prevent the safety risk caused by high temperature of the input insertion plates without increasing the size of the plug. It also has low cost, and can be suitably employed in various types of power plugs.
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