# US 2017/0287657 A1 · Push button switch > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0287657 A1 - Document ID: US20170287657A1 - Status: Published application - Kind: A1 - Application number: 15/510,251 - Filed: 2015-11-30 - Published: 2017-10-05 - Earliest claimed: 2014-12-15 - Assignees: OMRON Corporation - Applicants: OMRON Corporation - Inventors: Mamiko NAKA; Kenshi NAGATA; Hiroaki FUJINO - Web page: https://patentgrep.com/patent/US20170287657A1 ## CPC - H01H 13/14: Operating parts, e.g. push-button - H01H 13/06: Dustproof, splashproof, drip-proof, waterproof or flameproof casings - H01H 13/18: adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift - H01H 13/70: having a plurality of operating members associated with different sets of contacts, e.g. keyboard (mounting together a plurality of independent switches H02B) - H01H 1/24: with resilient mounting - H01H 9/04: Dustproof, splashproof, drip-proof, waterproof, or flameproof casings - H01H 2223/044: Protecting cover - H01H 2235/01: Spiral spring - 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 A push button switch includes a housing made up of a base and a cover, a first plunger mounted on the cover so as to be pushed down, a movable contacting piece configured to be driven by a push-down operation on the first plunger, a movable contact provided in the movable contacting piece, and a fixed contact disposed so as to come into and out of contact with the movable contact. Specifically, the movable contacting piece includes a movable contact piece provided with the movable contact, and an operation tongue piece disposed on at least one side of the movable contact piece and coupled with the movable contact piece so as to rotate integrally. The operation tongue piece is operated by the operation body of the first plunger to bring the movable contact into and out of contact with the fixed contact. ## Claims ### Claim 1 A push button switch comprising: a housing made up of a base and a cover; a first plunger mounted on the cover so as to be pushed down, and having an operation body at a tip of an operating arm portion projecting sideways from an inner surface of the first plunger; a movable contacting piece configured to be driven by a push-down operation on the first plunger; a movable contact provided in the movable contacting piece; and a fixed contact disposed so as to come into and out of contact with the movable contact, wherein the movable contacting piece includes: a movable contact piece provided with the movable contact; and a first operation tongue piece disposed on one of both sides of the movable contact piece and coupled with the movable contact piece so as to rotate integrally, and wherein the first operation tongue piece is operated by the operation body of the first plunger to bring the movable contact into and out of contact with the fixed contact. ### Claim 2 (depends on 1) The push button switch according to claim 1, wherein the push button switch comprises a second plunger mounted on the cover so as to be pushed down, and having an operation body at a tip of an operating arm portion projecting sideways from an inner surface of the second plunger, the movable contacting piece further includes a second operation tongue piece disposed on another side of the both sides of the movable contact piece and coupled with the movable contact piece so as to rotate integrally, and the first and second operation tongue pieces are respectively operated by the first and second plungers to bring the movable contact into and out of contact with the fixed contact. ### Claim 3 (depends on 2) The push button switch according to claim 2, wherein a first movable contacting piece and a second movable contacting piece are disposed so as to be symmetrical in the housing, the first movable contacting piece has the first operation tongue piece disposed on one of both sides of the movable contact piece, the second movable contacting piece is formed so as to have a relation of a mirror-image centered on an imaginary surface that separates between the first movable contacting piece and the second movable contacting piece, the first operation tongue piece of the first movable contacting piece and the second operation tongue piece of the second movable contacting piece are respectively operated by the first and second plungers to respectively bring a first movable contact of the first movable contacting piece and a second movable contact of the second movable contacting piece into and out of contact with a first fixed contact and a second fixed contact. ### Claim 4 (depends on 3) The push button switch according to claim 3, wherein the foregoing first and second movable contacting pieces are respectively disposed on both sides of the movable contacting piece. ### Claim 5 (depends on 1) The push button switch according to claim 1, wherein the operation body has an operation surface that smoothly slides on a surface of the first operation tongue piece. ### Claim 6 (depends on 1) The push button switch according to claim 1, wherein the movable contacting piece is bent in a substantially U-shape. ### Claim 7 (depends on 1) The push button switch according to claim 1, wherein the first operation tongue piece is bent so as to protrude toward the first plunger. ### Claim 8 (depends on 1) The push button switch according to claim 1, wherein a pressing portion of the first plunger is on a same plane as a surface of the housing. ### Claim 9 (depends on 2) The push button switch according to claim 2, wherein the first and second plungers is formed so as to have a relation of a mirror-image centered on an imaginary surface that separates between the first and second plungers. ### Claim 10 (depends on 1) The push button switch according to claim 1, wherein a pair of the movable contacting pieces is formed so as have a relation of a mirror-image centered on an imaginary surface that separates between the movable contacting pieces.