# US 12,178,325 B2 · Ottoman linkage device, frame body, and seat > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,178,325 B2 - Document ID: US12178325B2 - Status: Granted - Kind: B2 - Application number: 18/034,148 - Filed: 2021-11-05 - Published: 2023-11-30 - Granted: 2024-12-31 - Earliest claimed: 2020-11-19 - Assignees: DewertOkin Technology Group Co., Ltd. - Applicants: Dewertokin Technology Group Co., Ltd. - Inventors: Long Li; Qiqi Ye; Liming Yang; Pengfei He; Bin Shen; Kangming Tao; Guowei Wang - Web page: https://patentgrep.com/patent/US12178325B2 ## CPC - A47C 1/0355: actuated by linkages, e.g. lazy-tongs mechanisms - A47C: CHAIRS; SOFAS; BEDS ## Abstract Provided are an ottoman linkage device, a frame body, and a seat. The ottoman linkage device includes an upper link, a lower link, a middle ottoman link, a first front ottoman link, a second front ottoman link, a first connection link, a second connection link, a front ottoman bracket, and a middle ottoman bracket. The upper link or the lower link is rotatable under a driving force to make the ottoman linkage device unfold or fold. By changing the length of the first connection link and the length of the second connection link, the magnitude of the driving force of the first connection link can be adjusted. ## Claims ### Claim 1 An ottoman linkage device, comprising an upper link, a lower link, a middle ottoman link, a first front ottoman link, a second front ottoman link, a first connection link, a second connection link, a front ottoman bracket, and a middle ottoman bracket, wherein the lower link, the middle ottoman link, and the middle ottoman bracket are sequentially hinged, the upper link, the first front ottoman link, and the middle ottoman bracket are sequentially hinged, the middle ottoman link is hinged to the upper link, the second front ottoman link is hinged between the first front ottoman link and the front ottoman bracket, the first connection link is hinged to the second connection link, the first connection link is hinged to the front ottoman bracket, the second connection link is hinged to the first front ottoman link, and the middle ottoman bracket is hinged to the first connection link. ### Claim 2 (depends on 1) The ottoman linkage device of claim 1, wherein one end of the middle ottoman bracket is hinged to the first connection link, and another end of the middle ottoman bracket is provided with a recliner cushion attachment platform. ### Claim 3 (depends on 2) The ottoman linkage device of claim 2, wherein one end of the front ottoman bracket is hinged to the second front ottoman link, and another end of the front ottoman bracket is provided with a front ottoman cushion attachment platform. ### Claim 4 (depends on 3) The ottoman linkage device of claim 3, wherein, when the ottoman linkage device is unfolded, the recliner cushion attachment platform is horizontally flush with the front ottoman cushion attachment platform; and when the ottoman linkage device is folded, the recliner cushion attachment platform is vertically flush with the front ottoman cushion attachment platform. ### Claim 5 (depends on 2) The ottoman linkage device of claim 2, wherein a height of a hinge point of the second front ottoman link and the front ottoman bracket is lower than a height of a top surface of the recliner cushion attachment platform. ### Claim 6 (depends on 1) The ottoman linkage device of claim 1, wherein one end of the first front ottoman link is hinged to the upper link, another end of the first front ottoman link is hinged to the middle ottoman bracket, and a hinge point of the second front ottoman link and the first front ottoman link is between hinge points at two ends of the first front ottoman link. ### Claim 7 (depends on 1) The ottoman linkage device of claim 1, wherein one end of the first connection link is hinged to the front ottoman bracket, another end of the first connection link is hinged to the second connection link, and a hinge point of the middle ottoman bracket and the first connection link is between hinge points at two ends of the first connection link. ### Claim 8 (depends on 1) The ottoman linkage device of claim 1, wherein, the upper link or the lower link is rotatable under a driving force and capable of driving a linkage of the middle ottoman link, the first front ottoman link, the second front ottoman link, the first connection link, the second connection link, the front ottoman bracket, and the middle ottoman bracket to make the ottoman linkage device unfold or fold. ### Claim 9 (depends on 1) A frame body, comprising a fixed assembly, a movable link assembly, and the ottoman linkage device of claim 1, wherein the movable link assembly is connected to the fixed assembly, and the ottoman linkage device is hinged to the movable link assembly. ### Claim 10 (depends on 9) A seat, comprising the frame body of claim 9. ### Claim 11 (depends on 2) The ottoman linkage device of claim 2, wherein, the upper link or the lower link is rotatable under a driving force and capable of driving a linkage of the middle ottoman link, the first front ottoman link, the second front ottoman link, the first connection link, the second connection link, the front ottoman bracket, and the middle ottoman bracket to make the ottoman linkage device unfold or fold. ### Claim 12 (depends on 3) The ottoman linkage device of claim 3, wherein, the upper link or the lower link is rotatable under a driving force and capable of driving a linkage of the middle ottoman link, the first front ottoman link, the second front ottoman link, the first connection link, the second connection link, the front ottoman bracket, and the middle ottoman bracket to make the ottoman linkage device unfold or fold. ### Claim 13 (depends on 4) The ottoman linkage device of claim 4, wherein, the upper link or the lower link is rotatable under a driving force and capable of driving a linkage of the middle ottoman link, the first front ottoman link, the second front ottoman link, the first connection link, the second connection link, the front ottoman bracket, and the middle ottoman bracket to make the ottoman linkage device unfold or fold. ### Claim 14 (depends on 5) The ottoman linkage device of claim 5, wherein, the upper link or the lower link is rotatable under a driving force and capable of driving a linkage of the middle ottoman link, the first front ottoman link, the second front ottoman link, the first connection link, the second connection link, the front ottoman bracket, and the middle ottoman bracket to make the ottoman linkage device unfold or fold. ### Claim 15 (depends on 6) The ottoman linkage device of claim 6, wherein, the upper link or the lower link is rotatable under a driving force and capable of driving a linkage of the middle ottoman link, the first front ottoman link, the second front ottoman link, the first connection link, the second connection link, the front ottoman bracket, and the middle ottoman bracket to make the ottoman linkage device unfold or fold. ### Claim 16 (depends on 7) The ottoman linkage device of claim 7, wherein, the upper link or the lower link is rotatable under a driving force and capable of driving a linkage of the middle ottoman link, the first front ottoman link, the second front ottoman link, the first connection link, the second connection link, the front ottoman bracket, and the middle ottoman bracket to make the ottoman linkage device unfold or fold. ### Claim 17 (depends on 2) A frame body, comprising a fixed assembly, a movable link assembly, and the ottoman linkage device of claim 2, wherein the movable link assembly is connected to the fixed assembly, and the ottoman linkage device is hinged to the movable link assembly. ### Claim 18 (depends on 3) A frame body, comprising a fixed assembly, a movable link assembly, and the ottoman linkage device of claim 3, wherein the movable link assembly is connected to the fixed assembly, and the ottoman linkage device is hinged to the movable link assembly. ### Claim 19 (depends on 4) A frame body, comprising a fixed assembly, a movable link assembly, and the ottoman linkage device of claim 4, wherein the movable link assembly is connected to the fixed assembly, and the ottoman linkage device is hinged to the movable link assembly. ### Claim 20 (depends on 5) A frame body, comprising a fixed assembly, a movable link assembly, and the ottoman linkage device of claim 5, wherein the movable link assembly is connected to the fixed assembly, and the ottoman linkage device is hinged to the movable link assembly.