# US 2013/0278362 A1 · Electromagnetic relay > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0278362 A1 - Document ID: US20130278362A1 - Status: Published application - Kind: A1 - Application number: 13/855,998 - Filed: 2013-04-03 - Published: 2013-10-24 - Earliest claimed: 2012-04-19 - Assignees: Fujitsu Component Limited - Applicants: Fujitsu Component Limited - Inventors: Daiei IWAMOTO; Takashi Yuba - Web page: https://patentgrep.com/patent/US20130278362A1 ## CPC - H01H 51/22: Polarised relays {(H01H51/284 takes precedence)} - H01H 1/26: with spring blade support - H01H 51/2227: {in which the movable part comprises at least one permanent magnet, sandwiched between pole-plates, each forming an active air-gap with parts of the stationary magnetic circuit (H01H51/2209 takes precedence)} - H01H 51/2281: {Contacts rigidly combined with armature} - 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 An electromagnetic relay includes: a yoke capable of changing a magnetic pole thereof by an electromagnet; an armature that is magnetized by a permanent magnet and contacts with or separates from the yoke in accordance with the magnetic pole of the yoke; a movable contact that contacts with a fixing contact; an elastic body that biases the movable contact; and a pressing member that presses the elastic body in accordance with a movement of the armature to cause the movable contact to at least contact with or separate from the fixing contact, wherein a cover fixing the permanent magnet and the armature, and the pressing member are integrally formed. ## Claims ### Claim 1 An electromagnetic relay comprising: a yoke capable of changing a magnetic pole thereof by an electromagnet; an armature that is magnetized by a permanent magnet and contacts with or separates from the yoke in accordance with the magnetic pole of the yoke; a movable contact that contacts with a fixing contact; an elastic body that biases the movable contact; and a pressing member that presses the elastic body in accordance with a movement of the armature to cause the movable contact to at least contact with or separate from the fixing contact, wherein a cover fixing the permanent magnet and the armature, and the pressing member are integrally formed. ### Claim 2 (depends on 1) The electromagnetic relay according to claim 1, wherein the pressing member comprises: a first pressing portion that presses the elastic body to cause the movable contact to contact with the fixing contact; and a second pressing portion that presses the elastic body to cause the movable contact to separate from the fixing contact. ### Claim 3 (depends on 2) The electromagnetic relay according to claim 2, wherein a distance from the movable contact to the first pressing portion is greater than a distance from the movable contact to the second pressing portion. ### Claim 4 (depends on 2) The electromagnetic relay according to claim 2, wherein a distance from the elastic body to the second pressing portion is greater than a distance from the elastic body to the first pressing portion. ### Claim 5 (depends on 3) The electromagnetic relay according to claim 3, wherein the first pressing portion and the second pressing portion press the elastic body at opposing sides with respect to a line connecting a fulcrum of the elastic body and the movable contact. ### Claim 6 (depends on 1) The electromagnetic relay according to claim 1, wherein the yoke is a pair of yokes, the armature is located so as to sandwich edge portions of the pair of yokes, and a rotation of the cover causes the armature and the edge portions to contact with or separate from each other. ### Claim 7 (depends on 6) The electromagnetic relay according to claim 6, further comprising: a block that fixes the yoke, wherein a hole is formed in one of the block and the cover, and a protrusion fitting in the hole is formed in the other one at a center of rotation of the cover, and a gap between the hole and the protrusion in an arrangement direction of the pair of yokes is shorter than a gap in a direction intersecting with the arrangement direction. ### Claim 8 (depends on 6) The electromagnetic relay according to claim 6, wherein a center of rotation of the cover is not located on a line connecting the pair of yokes. ### Claim 9 An electromagnetic relay comprising: a yoke capable of changing a magnetic pole thereof by an electromagnet; an armature that is magnetized by a permanent magnet and contacts with or separates from the yoke in accordance with the magnetic pole of the yoke; a movable contact that contacts with a fixing contact; plate-like elastic bodies that bias the movable contact; and a pressing member that presses at least one of the plate-like elastic bodies in accordance with a movement of the armature to cause the movable contact to at least contact with or separate from the fixing contact; wherein the plate-like elastic bodies are fixed to each other at one point. ### Claim 10 (depends on 9) The electromagnetic relay according to claim 9, wherein the plate-like elastic bodies are fixed to each other at the movable contact.