Passenger headrest height adjustment system
AssigneeGM Global Technology Operations LLC
InventorsMinseok Jeon, Kwangmin Park, Bongbum Back, Byungjin Min
Life of this patent
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Abstract
A vehicle headrest height adjustment system includes a vehicle seat having a seat back, a seat base and a headrest. A sensing device generates a signal when the vehicle seat is unoccupied by an occupant. A headrest displacement mechanism is connected to the headrest and reversibly displaces the headrest between a headrest extended position and a headrest retracted position. The headrest displacement mechanism lowers the headrest to the headrest retracted position when the signal is received from the sensing device that the vehicle seat is unoccupied by the occupant defined when the occupant is not present.
Claims11
A vehicle headrest height adjustment system, comprising:
- a vehicle seat having a seat back, a seat base and a headrest;
- a sensing device generating a signal when the vehicle seat is unoccupied by an occupant;
- and
- a headrest displacement mechanism connected to the headrest and reversibly displacing the headrest between a headrest extended position and a headrest retracted position, the headrest displacement mechanism lowering the headrest to the headrest retracted position when the signal is received from the sensing device that the vehicle seat is unoccupied by the occupant,
- wherein the headrest displacement mechanism includes a motor positioned within a housing located within the seat back, and at least one telescoping rod supports the headrest to the seat back and is connected to the motor thereby permitting telescoping motion of the headrest by operation of the motor, and
- wherein the headrest displacement mechanism includes:
- a threaded portion of the at least one telescoping rod;
- a shaft sleeve extending from the motor into the at least one telescoping rod;
- and
- a drive gear connected to the shaft sleeve engaging the threaded portion wherein operation of the motor rotates the drive gear and thereby the threaded portion initiates telescoping motion of the headrest.
A headrest height adjustment system, comprising:
- a vehicle seat having a seat base, a seat back rotatably connected to the seat back and a headrest telescoping from the seat back;
- a sensing device generating a signal if the vehicle seat is unoccupied by an occupant;
- a first telescoping rod and a second telescoping rod connected to the headrest allowing the headrest to slidably move between a headrest extended position and a headrest retracted position;
- a headrest displacement mechanism connected to the headrest and one of the first telescoping rod and the second telescoping rod, the headrest displacement mechanism automatically lowering the headrest to the headrest retracted position when the signal is received from the sensing device that the vehicle seat is unoccupied by the occupant defined when the occupant is not present, wherein the headrest displacement mechanism includes a motor, the motor being positioned in a housing which is fixed within the seat back;
- a shaft connected to and axially rotated by operation of the motor, the shaft extending into a tubular cavity of one of the first telescoping rod and the second telescoping rod;
- an inner wall of the one of the first telescoping rod and the second telescoping rod including a threaded portion facing into the tubular cavity;
- and
- a drive gear fixed on the shaft and threadingly engaging the threaded portion.
Dependencies are inferred from the claim text.