VEHICLE SEAT

• US 20190193674A1
• Filed: 11/05/2018
• Published: 06/27/2019
• Est. Priority Date: 12/25/2017
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: FUKAWATASE, Osamu, MATSUZAKI, Makoto
• Granted Patent: US 10,640,081 B2
• Time in Patent Office: Days
• CPC Class Codes: B60R 2022/3402 Retractor casings; Mounting thereof
• CPC Class Codes: B60R 2022/4473 using an electric retraction device combined with a spring B60R2022/444, B60R2022/4466
• CPC Class Codes: B60R 22/44 with means for reducing belt tension during use under normal conditions not included in the retractor B60R22/19; B60R22/3405 takes precedence

Abstract

A vehicle seat includes a seat back, a motor, a gear, a take-up device and a pre-tensioner component. The seat back extends in a seat vertical direction and supports the back area of a seat occupant. A seat back frame structures a framework of the seat back. The motor is mounted to an upper portion of the seat back frame. The gear is arranged along the seat back frame adjacent to the motor and transmits driving force from the motor. The take-up device is arranged along the seat back frame adjacent to the gear, and is provided with a spool onto which a webbing is wound. Driving force from the motor is transmitted to the take-up device via the gear. The pre-tensioner component is arranged along the seat back frame adjacent to the take-up device. When activated, the pre-tensioner component forcibly takes up the spool.

Claims

1. A vehicle seat, comprising:

a seat back extending in a seat vertical direction and supporting a dorsal region of a seat occupant;

a motor mounted to an upper portion of a seat back frame configuring a framework of the seat back;

a gear arranged along the seat back frame adjacent to the motor, the gear transmitting driving force from the motor;

a take-up device arranged along the seat back frame adjacent to the gear, the take-up device being provided with a spool onto which a webbing is wound, and driving force from the motor being transmitted to the take-up device via the gear; and

a pre-tensioner component arranged along the seat back frame adjacent to the take-up device, the pre-tensioner component forcibly rotating the spool when activated.

2. The vehicle seat according to claim 1, wherein:

the motor is disposed at a front face side of the seat back frame, and

the take-up device and the pre-tensioner component are disposed at a back face side of the seat back frame.

3. The vehicle seat according to claim 1, wherein the motor, the gear, the take-up device and the pre-tensioner component are arrayed in the seat vertical direction at a back face side of the seat back frame.

4. The vehicle seat according to claim 1, wherein the motor, the gear and the take-up device are arrayed in a seat width direction at a back face side of the seat back frame.

5. The vehicle seat according to claim 1, further comprising a force limiter component provided at the take-up device, the force limiter component limiting a restraining force from the webbing.

6. The vehicle seat according to claim 5, wherein the force limiter component is arranged along the seat back frame adjacent to the spool.