# US 11,309,142 B1 · Keyboard device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,309,142 B1 - Document ID: US11309142B1 - Status: Granted - Kind: B1 - Application number: 17/240,150 - Filed: 2021-04-26 - Granted: 2022-04-19 - Earliest claimed: 2021-03-16 - Assignees: Primax Electronics Ltd. - Applicants: Primax Electronics Ltd. - Inventors: Chia-Wei Chang; Chin-Sung Pan - Web page: https://patentgrep.com/patent/US11309142B1 ## CPC - H01H 3/125: {using a scissor mechanism as stabiliser} - 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: 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 keyboard device includes a base plate and a key structure. The base plate includes a first coupling part. The first coupling part includes a first locking hole. The key structure includes a keycap, a stabilizer bar and a first connecting element. The stabilizer bar is arranged between the keycap and the base plate. The stabilizer bar includes a transverse bar part and a first hook part. The transverse bar part is pivotally coupled to the keycap. The first hook part is penetrated through the first locking hole of the first coupling part. The first connecting element includes a first supporting structure. The first supporting structure is arranged between the first hook part of the stabilizer bar and the base plate. The first hook part is supported by the first supporting structure. Consequently, the first hook part is contacted with an inner wall of the first locking hole. ## Claims ### Claim 1 A keyboard device, comprising: a base plate comprising a first coupling part, wherein the first coupling part comprises a first locking hole; and a key structure comprising: a keycap located over the base plate; a stabilizer bar arranged between the keycap and the base plate, wherein the stabilizer bar comprises a transverse bar part and a first hook part, wherein the transverse bar part is pivotally coupled to the keycap, and the first hook part is penetrated through the first locking hole of the first coupling part; and a first connecting element and a second connecting element arranged between the keycap and the base plate, wherein the keycap is movable upwardly or downwardly relative to the base plate through the first connecting element, and the first connecting element comprises a first supporting structure, wherein the first supporting structure is arranged between the first hook part of the stabilizer bar and the base plate, and the first hook part is supported by the first supporting structure, so that the first hook part is contacted with an inner wall of the first locking hole, wherein the first connecting element and the second connecting element are scissors-type connecting elements. ### Claim 2 (depends on 1) The keyboard device according to claim 1, wherein the second connecting element is located beside the first connecting element, wherein the keycap is movable upwardly or downwardly relative to the base plate through the first connecting element and the second connecting element, and the second connecting element comprises a second supporting structure. ### Claim 3 (depends on 2) The keyboard device according to claim 2, wherein the base plate further comprises a second coupling part, and the second coupling part comprises a second locking hole, wherein the stabilizer bar further comprises a second hook part, and the second hook part is penetrated through the second locking hole of the second coupling part, wherein the second supporting structure of the second connecting element is arranged between the second hook part of the stabilizer bar and the base plate, and the second hook part is supported by the second supporting structure, so that the second hook part is contacted with an inner wall of the second locking hole. ### Claim 4 (depends on 3) The keyboard device according to claim 3, wherein the first supporting structure of the first connecting element has a first supporting surface, and the second supporting structure of the second connecting element has a second supporting surface, wherein the first hook part of the stabilizer bar is contacted with the first supporting surface, and there is a first included angle between the first hook part of the stabilizer bar and the first supporting surface, wherein the second hook part of the stabilizer bar is contacted with the second supporting surface, and there is a second included angle between the second hook part of the stabilizer bar and the second supporting surface. ### Claim 5 (depends on 4) The keyboard device according to claim 4, wherein while the keycap is moved upwardly or downwardly relative to the base plate through the first connecting element and the second connecting element, the stabilizer bar is correspondingly swung, wherein as the stabilizer bar is swung, the first hook part of the stabilizer bar is slid along the first supporting surface of the first supporting structure and the inner wall of the first locking hole, and the second hook part of the stabilizer bar is slid along the second supporting surface of the second supporting structure and the inner wall of the second locking hole. ### Claim 6 (depends on 4) The keyboard device according to claim 4, wherein while the keycap is moved downwardly relative to the base plate through the first connecting element and the second connecting element and the keycap is moved to a terminal point of a travel distance, the first supporting surface of the first supporting structure is in parallel with the first hook part of the stabilizer bar, and the second supporting surface of the second supporting structure is in parallel with the second hook part of the stabilizer bar. ### Claim 7 (depends on 2) The keyboard device according to claim 2, wherein the first connecting element further comprises a first outer frame and a first inner frame pivotally coupled to the first outer frame, and the second connecting element further comprises a second outer frame and a second inner frame pivotally coupled to the second outer frame, wherein while the keycap is moved downwardly or upwardly relative to the base plate through the first connecting element and the second connecting element, the first outer frame and the first inner frame are correspondingly swung by using a pivotal region between the first outer frame and the first inner frame as a fulcrum, and the second outer frame and the second inner frame are correspondingly swung by using a pivotal region between the second outer frame and the second inner frame as the fulcrum. ### Claim 8 (depends on 7) The keyboard device according to claim 7, wherein the first outer frame of the first connecting element has a first lateral side and a second lateral side opposed to the first lateral side, and the second outer frame of the second connecting element has a third lateral side and a fourth lateral side opposed to the third lateral side, wherein the second lateral side of the first outer frame and the third lateral side of the second outer frame face each other, the first supporting structure is located at the first lateral side of the first outer frame, and the second supporting structure is located at the fourth lateral side of the second outer frame. ### Claim 9 (depends on 1) The keyboard device according to claim 1, wherein the keyboard device further comprises a switch circuit board, and the switch circuit board is arranged between the key structure and the base plate, wherein when the switch circuit board is triggered by the key structure, the switch circuit board generates a key signal.