# US 12,009,172 B2 · High-voltage DC relay with auxiliary contact > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,009,172 B2 - Document ID: US12009172B2 - Status: Granted - Kind: B2 - Application number: 17/950,256 - Filed: 2022-09-22 - Published: 2023-03-23 - Granted: 2024-06-11 - Earliest claimed: 2021-09-23 - Assignees: Xiamen Hongfa Electric Power Controls Co., Ltd. - Applicants: Xiamen Hongfa Electric Power Controls Co., Ltd. - Inventors: Shuming Zhong; Jinpin Chen; Wenguang Dai; Chengcan Luo; Songsheng Chen - Web page: https://patentgrep.com/patent/US12009172B2 ## CPC - H01H 50/546: {for contactors having bridging contacts} - H01H 1/58: Electric connections to or between contacts; Terminals {(for high tension switches H01H33/025; for electromagnetic relays H01H50/14; for circuit breakers H01H71/08)} - H01H 50/14: Terminal arrangements {(for coils H01H50/443)} - H01H 50/18: Movable parts of magnetic circuits, e.g. armature - H01H 50/44: Magnetic coils or windings - H01H 50/541: {Auxiliary contact devices} - H01H 9/0066: {Auxiliary contact devices (for arc transfer H01H9/38; for electromagnetic relays H01H50/541)} - H01H 2050/028: {Means to improve the overall withstanding voltage, e.g. creepage distances} - H01H: ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B7/10; electrolytic self-interrupters H01G9/18; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K17/00) ## Abstract The present disclosure discloses a high-voltage DC relay with an auxiliary contact. The high-voltage DC relay includes a cover, a main contact leading-out terminal, a pushing rod assembly, a main movable contact piece, an auxiliary contact leading-out terminal and an auxiliary movable contact piece. The main contact leading-out terminal and the auxiliary contact leading-out terminal are respectively fixed on a top wall of the cover and their bottom ends respectively extend into a cavity of the cover. The main movable contact piece and the auxiliary movable contact piece are respectively matched with corresponding bottom ends of the main contact leading-out terminal and the auxiliary contact leading-out terminal. Two auxiliary contact leading-out terminals are arranged on both sides of a connecting line between two main contact leading-out terminals, and the auxiliary movable contact piece is also connected with a plastic body. ## Claims ### Claim 1 A high-voltage DC relay with an auxiliary contact, comprising a cover, a main contact leading-out terminal, a pushing rod assembly, a main movable contact piece, an auxiliary contact leading-out terminal and an auxiliary movable contact piece; wherein two main contact leading-out terminals and two auxiliary contact leading-out terminals are respectively fixed on a top wall of the cover and their bottom ends respectively extend into a cavity of the cover, the main movable contact piece is mounted at a top of the pushing rod assembly, and both ends of the main movable contact piece are respectively matched with bottom ends of the two main contact leading-out terminals; wherein: two auxiliary contact leading-out terminals are arranged on both sides of a connecting line between the two main contact leading-out terminals, the auxiliary movable contact piece is arranged at a top end of the pushing rod assembly, and two ends of the auxiliary movable contact piece are respectively matched with bottom ends of the two auxiliary contact leading-out terminals; the auxiliary movable contact piece is also connected with a plastic body; and in the plastic body, a plastic blocking wall is respectively arranged between each of two sides of the plastic body corresponding to both ends of the auxiliary movable contact piece and the main contact leading-out terminal. ### Claim 2 (depends on 1) The high-voltage DC relay with an auxiliary contact according to claim 1, wherein a connecting line between the two auxiliary contact leading-out terminals is vertically intersected with the connecting line between the two main contact leading-out terminals. ### Claim 3 (depends on 2) The high-voltage DC relay with an auxiliary contact according to claim 2, wherein a midpoint of the connecting line between the two auxiliary contact leading-out terminals is coincided with a midpoint of the connecting line between the two main contact leading-out terminals. ### Claim 4 (depends on 1) The high-voltage DC relay with an auxiliary contact according to claim 1, wherein the plastic body comprises a middle plastic body in which a middle part of the auxiliary movable contact piece is wrapped and two U-shaped plastic bodies connected to both sides of the middle plastic body, U-shaped bottom walls of the two U-shaped plastic bodies are integrally connected with both sides of the middle plastic body respectively, and two U-shaped side walls of each of the two U-shaped plastic bodies are respectively disposed on both sides of a width of both ends of the auxiliary movable contact piece to form the blocking wall. ### Claim 5 (depends on 4) The high-voltage DC relay with an auxiliary contact according to claim 4, wherein the plastic body further comprises a bottom plastic body, and the bottom plastic body is connected to bottom surfaces of the U-shaped plastic body and the middle plastic body, so that the auxiliary movable contact piece is insulated from the main movable contact piece arranged therebelow. ### Claim 6 (depends on 5) The high-voltage DC relay with an auxiliary contact according to claim 5, wherein the pushing rod assembly comprises a U-shaped bracket and a spring, and the main movable contact piece presses against an inner side of a top wall of the U-shaped bracket through the spring; the bottom plastic body is also connected with a fixing sheet, and the plastic body is fixed on the top wall of the U-shaped bracket through the fixing sheet. ### Claim 7 (depends on 6) The high-voltage DC relay with an auxiliary contact according to claim 6, wherein the fixing sheet is provided with a protrusion protruding downwards, and the fixing sheet is fixed with the U-shaped bracket through the protrusion by riveting. ### Claim 8 (depends on 4) The high-voltage DC relay with an auxiliary contact according to claim 4, wherein first notches are provided at positions corresponding to the two U-shaped side walls of the U-shaped plastic body in the middle plastic body. ### Claim 9 (depends on 4) The high-voltage DC relay with an auxiliary contact according to claim 4, wherein: U-shaped bending parts for increasing elasticity of both ends of the auxiliary movable contact piece are arranged in both ends of the auxiliary movable contact piece and close to a junction with the U-shaped bottom wall of the U-shaped plastic body, and a U-shaped opening of each of the U-shaped bending parts opens downwards. ### Claim 10 (depends on 1) The high-voltage DC relay with an auxiliary contact according to claim 1, wherein the cover is a ceramic cover.