# US 12,179,641 B2 · Conveyance seat > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,179,641 B2 - Document ID: US12179641B2 - Status: Granted - Kind: B2 - Application number: 18/466,072 - Filed: 2023-09-13 - Published: 2023-12-28 - Granted: 2024-12-31 - Earliest claimed: 2019-07-17 - Assignees: Ts Tech Co., Ltd. - Applicants: Ts Tech Co., Ltd. - Inventors: Yuto Aoki; Tadanori Masuda; Kei Okuma; Hidetsune Nonaka - Web page: https://patentgrep.com/patent/US12179641B2 ## CPC - B60N 2/1615: {Parallelogram-like structure} - B60N 2/0025: {by using weight measurement} - B60N 2/003: {characterised by the sensor mounting location in or on the seat} - B60N 2/0031: {mounted on the frame} - B60N 2/68: Seat frames - B60N 2210/42: Strain gauges - B60N: SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR ## Abstract A vehicle seat includes a seat cushion provided with a seat cushion frame, a front link configured to adjust a height of the seat cushion with respect to a base that is a slide rail or a vehicle body floor, and a front load detection sensor attached to an upper rail and configured to detect a load applied to the vehicle seat. The seat cushion frame includes a pair of side frames separated from each other in a seat width direction, the front link includes a first rotation shaft configured to be rotatable with respect to the seat cushion frame and a second rotation shaft configured to be rotatable with respect to the base, and the front load detection sensor is arranged at a position different from the second rotation shaft in a front to back direction of the seat. ## Claims ### Claim 1 A conveyance seat, comprising: a seat cushion provided with a seat cushion frame; a rear load detection sensor attached to a base that is a slide rail or a vehicle body floor and configured to detect a load applied to the conveyance seat; a front load detection sensor arranged in front of the rear load detection sensor; and a link member configured to adjust a height of the seat cushion with respect to the base, wherein the link member includes a first rotation shaft configured to be rotatable with respect to the seat cushion frame and a second rotation shaft configured to be rotatable with respect to the base, and an upper end of the front load detection sensor is located above the second rotation shaft. ### Claim 2 (depends on 1) The conveyance seat according to claim 1, wherein the seat cushion frame includes a pair of side frames separated from each other in a width direction of the conveyance seat, the side frame comprises a side frame recessed portion recessed upward from a lower end of the side frame, and when the seat cushion is located at the lowest position, the rear load detection sensor is arranged to face the side frame recessed portion in an up to down direction. ### Claim 3 (depends on 1) The conveyance seat according to claim 1, wherein the seat cushion frame includes a pair of side frames separated from each other in a width direction of the conveyance seat, the side frame comprises a side frame recessed portion recessed upward from a lower end of the side frame, the rear load detection sensor is attached via a sensor shaft, an upper end of the sensor shaft is located at an uppermost part of the rear load detection sensor, and the upper end of the sensor shaft is arranged to face the side frame recessed portion in an up to down direction. ### Claim 4 (depends on 1) The conveyance seat according to claim 1, wherein the seat cushion frame includes a pair of side frames separated from each other in a width direction of the conveyance seat, the side frame comprises a front recessed portion recessed upward from the lower end of the side frame, and the front load detection sensor is arranged to face the front recessed portion in an up to down direction. ### Claim 5 (depends on 1) The conveyance seat according to claim 1, wherein the front load detection sensor is attached to the base via a front sensor shaft. ### Claim 6 (depends on 1) The conveyance seat according to claim 1, wherein the seat cushion frame includes a pair of side frames separated from each other in a width direction of the conveyance seat and a rear side connecting member connecting rear end portions of the pair of side frames, the side frame comprises a side frame recessed portion recessed upward from a lower end of the side frame, and an upper end of the side frame recessed portion is located at a same height as the rear side connecting member. ### Claim 7 (depends on 1) The conveyance seat according to claim 1, wherein the seat cushion frame includes a pair of side frames separated from each other in a width direction of the conveyance seat, the side frame comprises a side frame recessed portion recessed upward from a lower end of the side frame, and the rear load detection sensor is arranged to face the side frame recessed portion in an up to down direction of the conveyance seat. ### Claim 8 (depends on 1) The conveyance seat according to claim 1, wherein the link member is a first link member, the conveyance seat further comprises a second link member that is rotatably attached to the seat cushion and the base, a central portion of the second link member includes a circular arc-shaped portion curved toward the seat cushion frame, and the rear load detection sensor is arranged to face the circular arc-shaped portion in an up to down direction of the conveyance seat. ### Claim 9 (depends on 1) The conveyance seat according to claim 1, further comprising: a link support member that is attached to the base and supports the link member and the rear load detection sensor, wherein each end portion of the link support member in a width direction of the conveyance seat extends outward from the link support member. ### Claim 10 A method for manufacturing a conveyance seat, comprising: preparing a seat cushion frame of a seat cushion of the conveyance seat; and attaching a rear load detection sensor configured to detect a load applied to the conveyance seat to a base that is a slide rail or a vehicle body floor of the conveyance seat; and attaching a front load detection sensor arranged in front of the rear load detection sensor, and a link member configured to adjust a height of the seat cushion with respect to the base, wherein the link member includes a first rotation shaft configured to be rotatable with respect to the seat cushion frame and a second rotation shaft configured to be rotatable with respect to the base, and an upper end of the front load detection sensor is located above the second rotation shaft. ### Claim 11 (depends on 10) The method according to claim 10, wherein the seat cushion frame includes a pair of side frames separated from each other in a width direction of the conveyance seat, the side frame comprises a side frame recessed portion recessed upward from a lower end of the side frame, and when the seat cushion is located at the lowest position, the rear load detection sensor is arranged to face the side frame recessed portion in an up to down direction. ### Claim 12 (depends on 10) The method according to claim 10, wherein the seat cushion frame includes a pair of side frames separated from each other in a width direction of the conveyance seat, the side frame comprises a side frame recessed portion recessed upward from a lower end of the side frame, the rear load detection sensor is attached via a sensor shaft, an upper end of the sensor shaft is located at an uppermost part of the rear load detection sensor, and the upper end of the sensor shaft is arranged to face the side frame recessed portion in an up to down direction. ### Claim 13 (depends on 10) The method according to claim 10, wherein the seat cushion frame includes a pair of side frames separated from each other in a width direction of the conveyance seat, the side frame comprises a front recessed portion recessed upward from the lower end of the side frame, and the front load detection sensor is arranged to face the front recessed portion in an up to down direction. ### Claim 14 (depends on 10) The method according to claim 10, wherein the front load detection sensor is attached to the base via a front sensor shaft. ### Claim 15 (depends on 10) The method according to claim 10, wherein the seat cushion frame includes a pair of side frames separated from each other in a width direction of the conveyance seat and a rear side connecting member connecting rear end portions of the pair of side frames, the side frame comprises a side frame recessed portion recessed upward from a lower end of the side frame, and an upper end of the side frame recessed portion is located at a same height as the rear side connecting member. ### Claim 16 (depends on 7) The method according to claim 7, wherein the seat cushion frame includes a pair of side frames separated from each other in a width direction of the conveyance seat, the side frame comprises a side frame recessed portion recessed upward from a lower end of the side frame, and the rear load detection sensor is arranged to face the side frame recessed portion in an up to down direction of the conveyance seat. ### Claim 17 (depends on 10) The method according to claim 10, wherein the link member is a first link member, the conveyance seat comprises a second link member that is rotatably attached to the seat cushion and the base, a central portion of the second link member includes a circular arc-shaped portion curved toward the seat cushion frame, and the rear load detection sensor is arranged to face the circular arc-shaped portion in an up to down direction of the conveyance seat. ### Claim 18 (depends on 10) The method according to claim 10, wherein the conveyance seat comprises a link support member that is attached to the base and supports the link member and the rear load detection sensor, and each end portion of the link support member in a width direction of the conveyance seat extends outward from the link support member.