Sports vehicle seat with adaptive lateral restraints
An embodiment of a sports vehicle seat. The seat has lateral restraints for laterally retaining an occupant of the seat, and an actuating device for adapting the shape and/or size of the lateral restraints as a function of vehicle driving mode. Each lateral restraint incorporates at least one shape-memory member, which changes shape when subjected to physical external stress. And the actuating device subjects each shape-memory member to physical external stress to change the shape of the shape-memory member.
1. A sports vehicle seat; the seat comprises:
a vertical seatback;
a horizontal seat portion;
lateral restraints for laterally retaining an occupant of the seat and having the shape and/or size which are/is adaptive to adapt the degree of lateral restraint provided by the lateral restraints; and
an actuating device to adapt the shape and/or size of the lateral restraints as a function of vehicle driving mode so that each lateral restraint may assume a comfort configuration having a low degree of lateral restraint, and a racing configuration having a high degree of lateral restraint;
wherein the seat portion comprises at least two first lateral restraints, which expand upwards when switching from the comfort configuration to the racing configuration; and
wherein each lateral restraint incorporates at least one shape-memory member which changes shape when subjected to physical external stress; and the actuating device subjects each shape-memory member to physical external stress to change the shape of the shape-memory member.
2. A seat as claimed in claim 1 , wherein the actuating device subjects each shape-memory member to electric heating of varying intensity.
3. A seat as claimed in claim 1 , wherein each shape-memory member comprises a main body made of a shape-memory polymer; and a number of actuating wires integrated in the main body, close to a lateral wall of the main body, and made of a shape-memory alloy.
4. A seat as claimed in claim 3 , wherein a shape-memory member comprises a number of parallel, spaced actuating wires.
5. A seat as claimed in claim 3 , wherein, to change the shape of a shape-memory member, the main body is heated to become deformable, the actuating wires are heated or cooled to produce a change in their length and, so deform the main body, and the main body is cooled to become once more rigid and so stabilize the new shape.
6. A seat as claimed in claim 1 , wherein each lateral restraint may assume intermediate configurations between the comfort configuration and the racing configuration.
7. A seat as claimed in claim 6 , wherein two lateral restraints facing each other on opposite sides of the seat deform and tilt towards each other to grip the occupant, when switching from the comfort configuration to the racing configuration.
8. A seat as claimed in claim 7 , wherein the seatback comprises at least two second lateral restraints, which deform and tilt towards each other to grip the occupant, when switching from the comfort configuration to the racing configuration.
9. A seat as claimed in claim 8 , wherein the two second lateral restraints deform by tilting towards each other and increasing in volume, when switching from the comfort configuration to the racing configuration.
10. A seat as claimed in claim 1 , wherein the two first lateral restraints deform by tilting towards each other to grip the occupant, when switching from the comfort configuration to the racing configuration.
11. A seat as claimed in claim 1 , wherein the two first lateral restraints rotate towards the occupant when switching from the comfort configuration to the racing configuration.
12. A seat as claimed in claim 11 , wherein each first lateral restraint is formed in at least two parts, which rotate by different angles when switching from the comfort configuration to the racing configuration.
13. A seat as claimed in claim 1 , wherein the actuating device comprises at least one sensor for determining the distance between at least one lateral restraint and the occupant, so as to adapt the shape and/or size of the lateral restraint as a function of the actual size of the occupant.
14. A seat as claimed in claim 13 , wherein the sensor is a proximity sensor.
15. A seat as claimed in claim 13 , wherein the sensor is a force sensor.
16. A seat as claimed in claim 13 , wherein the sensor is embedded in the lateral restraint.
17. A sports vehicle seat; the seat comprises:
a vertical seatback;
a horizontal seat portion;
lateral restraints for laterally retaining an occupant of the seat and having the shape and/or size which are/is adaptive to adapt the degree of lateral restraint provided by the lateral restraints; and
an actuating device to adapt the shape and/or size of the lateral restraints as a function of vehicle driving mode so that each lateral restraint may assume a comfort configuration characterized by a low degree of lateral restraint, and a racing configuration characterized by a high degree of lateral restraint;
wherein the seat portion comprises at least two first lateral restraints, which expand upwards when switching from the comfort configuration to the racing configuration;
wherein the two first lateral restraints rotate towards the occupant when switching from the comfort configuration to the racing configuration; and
wherein each first lateral restraint is formed in at least two parts, which rotate by different angles when switching from the comfort configuration to the racing configuration.