# US 9,437,383 B2 · Auxiliary contact mechanism of electromagnetic contactor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,437,383 B2 - Document ID: US9437383B2 - Status: Granted - Kind: B2 - Application number: 14/737,324 - Filed: 2015-06-11 - Published: 2016-03-31 - Granted: 2016-09-06 - Earliest claimed: 2014-09-26 - Assignees: Lsis Co., Ltd. - Applicants: Lsis Co., Ltd. - Inventors: Gwan Ho Choi - Web page: https://patentgrep.com/patent/US9437383B2 ## CPC - H01H 50/58: Driving arrangements structurally associated therewith; Mounting of driving arrangements on armature - H01H 50/02: Bases; Casings; Covers (frames for mounting two or more relays or for mounting a relay and another electric component H02B1/01, H04Q1/08, H05K) - H01H 50/14: Terminal arrangements {(for coils H01H50/443)} - H01H 50/545: {Self-contained, easily replaceable microswitches} - H01H 50/541: {Auxiliary contact devices} - H01H 2201/008: Both contacts movable - 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 invention relates to an auxiliary contact mechanism of an electromagnetic contactor, and more particularly, to an auxiliary contact mechanism of an electromagnetic contactor capable of maximizing a time duration for which power is supplied to a magnetic coil for switching a main contact until the main contact is closed. The auxiliary contact mechanism of an electromagnetic contactor, includes: a case formed to have a box shape; an auxiliary sliding member installed above the case, and moving up and down by receiving a pressure from a main contact sliding member; an elastic member accommodated in an insertion groove formed in the auxiliary sliding member; a pressing member insertion-installed below the auxiliary sliding member, and moving up and down by an elastic force of the elastic member; and a micro switch turned on/off by the pressing member. ## Claims ### Claim 1 An auxiliary contact mechanism of an electromagnetic contactor, comprising: a case formed to have a box shape; an auxiliary sliding member installed above the case, and moving up and down by receiving a pressure from a main contact sliding member; an elastic member accommodated in an insertion groove formed in the auxiliary sliding member; a pressing member insertion-installed in an insertion groove, and moving up and down by an elastic force of the elastic member; and a micro switch turned on/off by the pressing member. ### Claim 2 (depends on 1) The auxiliary contact mechanism of an electromagnetic contactor of claim 1, wherein the elastic member is formed as a compression coil spring. ### Claim 3 (depends on 1) The auxiliary contact mechanism of an electromagnetic contactor of claim 1, wherein the auxiliary sliding member is provided with a locking portion protruding inward at a lower end thereof, and wherein a locking groove for locking the locking portion is formed above the pressing member. ### Claim 4 (depends on 3) The auxiliary contact mechanism of an electromagnetic contactor of claim 3, wherein the pressing member is formed so that an outer diameter thereof is smaller than an inner diameter of the insertion groove. ### Claim 5 (depends on 1) The auxiliary contact mechanism of an electromagnetic contactor of claim 1, wherein the micro switch includes: a housing; a pair of terminals fixedly-installed in the housing and exposed to outside of the housing partially; a leaf spring configured to connect or disconnect the pair of terminals to or from each other; and a contact button configured to apply a force to the leaf spring by the pressing member. ### Claim 6 (depends on 1) The auxiliary contact mechanism of an electromagnetic contactor of claim 1, wherein a minimum operating load of the elastic member is set to be smaller than a returning load required when the micro switch is closed, and wherein a maximum operating load of the elastic member is set to be larger than an operating load required when the micro switch is open. ### Claim 7 (depends on 1) The auxiliary contact mechanism of an electromagnetic contactor of claim 1, wherein a second elastic member is disposed between the auxiliary sliding member and the micro switch. ### Claim 8 (depends on 1) The auxiliary contact mechanism of an electromagnetic contactor of claim 1, further comprising a second sliding member which performs an up/down motion within the auxiliary sliding member, wherein the elastic member includes: a first spring disposed on an upper surface of the second sliding member; and a second spring disposed between a lower surface of the second sliding member and the pressing member. ### Claim 9 (depends on 8) The auxiliary contact mechanism of an electromagnetic contactor of claim 8, wherein a spring constant of the first spring is set to be smaller than that of the second spring. ### Claim 10 (depends on 8) The auxiliary contact mechanism of an electromagnetic contactor of claim 8, wherein a maximum operating load of the first spring is set between an operating load required when the micro switch is open, and a returning load required when the micro switch is closed. ### Claim 11 (depends on 8) The auxiliary contact mechanism of an electromagnetic contactor of claim 8, wherein an operating load of the second spring is set to be larger than an operating load required when the micro switch is open.