# US 12,222,407 B2 · Device for checking the withstand voltage of a cable to which a connector is connected > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,222,407 B2 - Document ID: US12222407B2 - Status: Granted - Kind: B2 - Application number: 18/091,065 - Filed: 2022-12-29 - Published: 2023-07-06 - Granted: 2025-02-11 - Earliest claimed: 2021-12-31 - Assignees: Sewon Electronics Co., Ltd. - Applicants: Sewon Electronics Co., Ltd. - Inventors: Pengtao Jiang - Web page: https://patentgrep.com/patent/US12222407B2 ## CPC - G01R 31/1272: {of cable, line or wire insulation, e.g. using partial discharge measurements (locating faults in cables G01R31/083)} - G01R 31/66: Testing of connections, e.g. of plugs or non-disconnectable joints (testing for incorrect line connections G01R31/55) - G01R 31/52: Testing for short-circuits, leakage current or ground faults - G01R 31/58: Testing of lines, cables or conductors (testing of electric windings G01R31/72) - G01R 31/69: of terminals at the end of a cable or a wire harness; of plugs; of sockets, e.g. wall sockets or power sockets in appliances - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) ## Abstract A withstand voltage of a connector-coupled cable is checked by the device equipped with a pair of electrode boxes, and a control block configured to apply a start signal to a test instrument, which outputs a preset high voltage, according to an electrical state detected in each electrode box in which a housing whose a part of a front side is open; a conductive electrode plate mounted on an inner front side of the housing in such a way that it is rotatable around its top end, and a switch unit, mounted inside the housing with a predetermined gap from the electrode plate, to detect whether the electrode plate is rotated due to push on a lower part of the electrode plate are installed, wherein the electrical state is an electrical state between both terminals of the detection unit, and the preset high voltage is applied between both electrode plates. ## Claims ### Claim 1 A device for checking withstand voltage of a cable, comprising: a pair of electrode boxes; and a control block configured to apply a start signal to a test instrument, which drives output ports thereof with a preset voltage, in accordance with an electrical state detected in each of the pair of electrode boxes, wherein each of the pair of electrode boxes comprises: a housing configured such that at least a part of a front side thereof is open; a conductive electrode plate mounted on an inner front side of the housing in such a way that it is rotatable around its top end; and a switch unit, mounted inside the housing with a predetermined gap from the electrode plate, configured to detect a state in which the electrode plate is rotated while a lower part of the electrode plate is pushed inward, wherein the electrical state is an electrical state between both terminals of the switch unit, and the electrode plates of the pair of electrode boxes are electrically connected to the output ports respectively, and wherein the switch unit is configured such that the electrical state between both terminals is changed by a force applied by the electrode plate or an accessory member coupled to the electrode plate. ### Claim 2 (depends on 1) The device of claim 1, wherein the control block is further configured to apply a reset signal to the test instrument if the electrical state at a time of applying the start signal is not maintained until a predetermined time elapses from the time of applying the start signal. ### Claim 3 (depends on 1) The device of claim 1, wherein at least a part of region on the electrode plate is configured to have an inclined surface formed according to a shape that is more recessed toward inside of the housing as a part thereof is closer to center. ### Claim 4 (depends on 1) The device of claim 1, wherein the accessory member to face the switch unit when it rotates together with the electrode plate is coupled to the electrode plate. ### Claim 5 (depends on 4) The device of claim 4, wherein the switch unit is configured such that the electrical state between both terminals is changed by physical contact with the accessory member or by non-contact entrance of the accessory member into a predetermined detection space. ### Claim 6 (depends on 1) The device of claim 1, wherein the control block is connected to a specific line, through which the test instrument transmits a signal for displaying a test result according to driving the output ports to the preset voltage, and receives a signal carried on the specific line. ### Claim 7 (depends on 6) The device of claim 6, wherein the control block is configured to control lighting of a plurality of light source elements, which are fixedly installed on one surface of the housing, so that they are turned on differentially depending on a signal carried on the specific line. ### Claim 8 (depends on 6) The device of claim 6, further comprising a mechanical driving unit, installed above input means of a computing device, capable of individually stroking a plurality of keys provided on the input means, wherein the control block is configured to apply a driving signal to the mechanical driving unit so that it strokes a different key depending on a signal carried on the specific line. ### Claim 9 (depends on 1) The device of claim 1, wherein the control block is configured to apply the start signal at a time when the electrical states detected respectively from the pair of electrode boxes become the same. ### Claim 10 (depends on 1) The device of claim 1, wherein the control block is further configured to apply a reset signal to the test instrument when a predetermined time elapses from a time of applying the start signal. ### Claim 11 A device for checking withstand voltage of a cable, comprising: a pair of electrode boxes; and a control block configured to apply a driving start signal to a test instrument, which drives output ports thereof with a preset voltage, in accordance with an electrical state detected in each of the pair of electrode boxes, wherein each of the pair of electrode boxes comprises: a housing configured such that at least a part of a front side thereof is open; a conductive movable plate mounted on an inner front side of the housing in such a way that it is rotatable around its top end; and a static plate fixed to an inner front side of the housing so as to be vertically coplanar with the movable plate by leaving a gap with a lower end of the movable plate, wherein the electrical state is either of electrical disconnection and short circuit between the movable plate and the static plate according to whether a conductive object is inserted into the gap, and the movable plates or the static plates of the pair of electrode boxes are electrically connected to the output ports respectively, and wherein a lower part of the movable plate and an upper part of the static plate bend into the housing to form a curved surface, respectively. ### Claim 12 (depends on 11) The device of claim 11, further comprising: a first contact piece fixed to one side of the movable plate in an electrically insulating manner from the movable plate; and a second contact piece provided at a spot, on inner surface of a front support of the housing, that faces the first contact piece, and wherein signal lines for detecting a contact between the first and the second contact pieces are respectively connected to both contact pieces, and each of the signal lines is connected to a detecting circuit included in the control block. ### Claim 13 (depends on 12) The device of claim 12, wherein the control block is further configured to apply a reset signal to the test instrument if non-contact state between both contact pieces detected from the signal lines is not maintained until a predetermined time elapses from a time of applying the start signal. ### Claim 14 (depends on 11) The device of claim 11, wherein the control block comprises: a detecting circuit configured to apply a voltage to both terminals, which are the movable plate and the static plate respectively, in order to detect the electrical state; and a control unit configured to cut an electrical connection within the detection circuit so that no current flows therein when a signal corresponding to a short circuit between the movable plate and the static plate is detected from the detection circuit. ### Claim 15 (depends on 11) The device of claim 11, wherein the housing is structured such that height of the static plate from bottom of the housing adjustable. ### Claim 16 (depends on 11) The device of claim 11, wherein the control block is connected to a specific line, through which the test instrument transmits a signal for displaying a test result according to driving the output ports to the preset voltage, and receives a signal carried on the specific line. ### Claim 17 (depends on 11) The device of claim 11, wherein the control block is configured to apply the start signal at a time when the electrical states detected respectively from the pair of electrode boxes become the same. ### Claim 18 (depends on 11) The device of claim 11, wherein the control block is further configured to apply a reset signal to the test instrument when a predetermined time elapses from a time of applying the start signal.