Seat track mechanism for vehicle
AssigneeHyundai Transys Inc.
InventorsJae Sung Lee, Hwa Young Mun, Jae Sang Lim
Life of this patent
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Abstract
A seat track mechanism for installing beneath a vehicle seat in order to move the vehicle seat in the forward and backward directions includes a monotrack mechanism, to which a monopost structure and a single rail structure are applied. The seat track mechanism includes a structure for hook-engaging lower and upper rails constituting the mono track mechanism by hook guides. The single rail structure applied to the seat track mechanism is capable of not only reducing actuating force required for operation, but also preventing creation of excessive clearance upon stopping.
Claims16
A seat track mechanism for a vehicle comprising:
- a lower rail fixed to a body of the vehicle;
- an upper rail mounted to a seat of the vehicle, and movable forward and rearward along the lower rail;
- a driver for providing an actuating force to move the upper rail forward and rearward along the lower rail;
- and a locking mechanism mounted to the upper rail and adapted to control a rail gap between the locking mechanism and the lower rail, to restrain movement of the upper rail, wherein the locking mechanism reduces the rail gap when the vehicle seat is in a stopped state, to restrain the movement of the upper rail, and increases the rail gap when the vehicle seat is moved by the driver, to release movement restraint of the upper rail,
- wherein the locking mechanism comprises:
- a center case fixed mounted on the upper rail;
- and a center plate received in the center case in such a manner that the center plate moves alone or together with the center case, wherein the center plate is mounted to the driver,
- wherein:
- the center plate comprises a pressing head having two actuating surfaces each formed with a pressing protrusion and receiving grooves;
- and the center case comprises a pair of fingers for pressing the lower rail while operating together with the pressing head.
A seat track mechanism for a vehicle comprising:
- a lower rail fixed to a body of the vehicle;
- an upper rail mounted to a seat of the vehicle, and configured to move forward and rearward along the lower rail;
- a driver for providing an actuating force to move the upper rail forward and rearward along the lower rail, wherein the driver comprises:
- a lead screw rotatably mounted to the lower rail;
- a motor for rotating the lead screw;
- and a nut member mounted to the upper rail and formed with female threads having a shape corresponding to a screw shape of the lead screw, the nut member moving forward and rearward in accordance with rotation of the lead screw;
- and a locking mechanism mounted to the upper rail that selectively controls a rail gap between the locking mechanism and the lower rail so as to selectively restrain and facilitate movement of the upper rail, wherein the locking mechanism comprises:
- a center case fixedly mounted on the upper rail;
- and a center plate that is mounted to the driver and received in the center case in such a manner that the center plate moves alone or together with the center case, wherein the locking mechanism reduces the rail gap when the vehicle seat is in a stopped state, to restrain the movement of the upper rail, and increases the rail gap when the vehicle seat is moved by the driver, to release movement restraint of the upper rail,
- wherein:
- the center plate comprises a pressing head having two actuating surfaces each formed with a pressing protrusion and receiving grooves;
- and the center case comprises a pair of fingers for pressing the lower rail while operating together with the pressing head.
Dependencies are inferred from the claim text.