# US 10,308,302 B2 · Cushioning-material structure for vehicle seat > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,308,302 B2 - Document ID: US10308302B2 - Status: Granted - Kind: B2 - Application number: 15/722,695 - Filed: 2017-10-02 - Published: 2018-03-29 - Granted: 2019-06-04 - Earliest claimed: 2012-06-28 - Assignees: Ts Tech Co., Ltd. - Applicants: Ts Tech Co., Ltd. - Inventors: Tomohisa Chiba; Katsuhiro Kiya; Yoshinori Ueyama - Web page: https://patentgrep.com/patent/US10308302B2 ## CPC - B62J 1/18: Covers for saddles or other seats; Paddings - B60N 2/40: saddle type - B62J 1/12: Box-shaped seats; Bench-type seats, e.g. dual or twin seats - B62J 1/26: Paddings involving other resilient material, e.g. sponge rubber with inflatable compartments - B63B 2029/043: {Seats; Arrangements thereof on vessels} - B62J: CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS - B60N: SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR - B63B: SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING (arrangements of vessel ventilation, heating, cooling, or air-conditioning B63J2/00; floating substructures as supports of dredgers or soil-shifting machines E02F9/06) ## Abstract The purpose of the present invention is to provide a cushioning material structure, for a vehicle seat, that makes it possible to reduce the weight of the vehicle seat while maintaining stable riding performance. A cushioning material supported by the top surface of a bottom plate provided on a vehicle body is provided with voids. This allows weight reduction without reducing the thickness of the cushioning material as in conventional cushioning-material structures, thereby making it possible to reduce the weight of the vehicle seat while maintaining stable riding performance. ## Claims ### Claim 1 A cushion material structure of a vehicle seat, comprising: a cushion material supported by an upper surface of a bottom plate that is provided on a vehicle body, wherein the cushion material is formed so as to bend at a lowest layer part thereof and not at an upper layer part thereof, and wherein a density of the cushion material is the densest at the lowest layer part thereof. ### Claim 2 (depends on 1) The cushion material structure of the vehicle seat according to claim 1, wherein a plurality of space sections, each of which has a shape that becomes smaller as approaching an upper section thereof from a lower section thereof, are formed in the cushion material, the lowest layer part of the cushion material being lower ends of the space sections. ### Claim 3 (depends on 2) The cushion material structure of the vehicle seat according to claim 2, wherein a lower end section of each of the space sections is opened. ### Claim 4 (depends on 3) The cushion material structure of the vehicle seat according to claim 3, wherein a shape of an opening section of each of the space sections is either a circular shape or an oval shape. ### Claim 5 (depends on 3) The cushion material structure of the vehicle seat according to claim 3, wherein an inner surface of each of the space sections is a concave curved surface that is recessed upward. ### Claim 6 (depends on 3) The cushion material structure of the vehicle seat according to claim 3, wherein a laminate member is layered across an entire under surface of the cushion material. ### Claim 7 (depends on 6) The cushion material structure of the vehicle seat according to claim 6, wherein air holes that ensure air passage from the space sections are formed in the laminate member. ### Claim 8 A cushion material structure of a vehicle seat, comprising: a cushion material supported by an upper surface of a bottom plate that is provided on a vehicle body, wherein the bottom plate includes a main surface section and a sub surface section that is arranged in front of the main surface section and that is tilted upward with respect to the main surface section, at least one space section is formed in the cushion material at a part corresponding to a bent section between the main surface section and the sub surface section, and the at least one space section has a shape in which a width gradually becomes smaller as approaching an upper side from a lower side. ### Claim 9 (depends on 8) The cushion material structure of the vehicle seat according to claim 8, wherein the space section in the cushion material is formed at a part configured to correspond to an ischium of a passenger when sitting on the bent section. ### Claim 10 (depends on 8) The cushion material structure of the vehicle seat according to claim 8, wherein space sections are also provided in front of and behind the space section at the part corresponding to the bent section, and a wall section is provided between the space sections. ### Claim 11 (depends on 8) The cushion material structure of the vehicle seat according to claim 8, wherein the inner surface of the space section provided at the part corresponding to the bent section is a concave curved surface that is recessed upward, and a deepest point of the concave curved surface is arranged on the bent section. ### Claim 12 (depends on 8) The cushion material structure of the vehicle seat according to claim 8, wherein wall sections that extend vertically are formed in the bottom plate so as to face each other at left and right on the bent section, the wall sections being formed along the front-to-back direction. ### Claim 13 (depends on 8) The cushion material structure of the vehicle seat according to claim 8, wherein left and right mounting sections to be fixed to the vehicle body and a rib that is arranged between the left and right mounting sections and extends in a left-to-right direction are provided at a back side of the bent section in the bottom plate, and a top view V shaped bead arranged between the left and right mounting sections is formed on an upper side of the bottom plate. ### Claim 14 (depends on 13) The cushion material structure of the vehicle seat according to claim 13, wherein the bead is arranged so as to overlap with the space section provided at the part corresponding to the bent section in the cushion material.