Seat Belt Device

摘要

A seat belt device includes a spindle (11) for retracting a seat belt (13), an electric actuator (55), a pre-tensioner (14) and a power transmission mechanism (20), wherein the power transmission mechanism (20) can reversibly switch the connection and disconnection between the electric actuator (55) and the spindle (11) before the pre-tensioner (14) is activated, while when the pre-tensioner (14) is activated. The power transmission mechanism (20) non-reversibly interrupts the connection between the electric actuator (55) and the spindle (11) via an elastic piece (60) when a torque difference between an actuator-side gear (80) and a spindle-side gear (82) becomes larger than a predetermined value.

主权项

1. A seat belt device comprising:
a seat belt retracting member for retracting a seat belt; a primary rotation source which rotates the seat belt retracting member when it is brought into connection with the seat belt retracting member; a secondary rotation source which rotates the seat belt retracting member at faster speeds than the primary rotation source; and a power transmission mechanism adapted for reversibly switching between connection and disconnection of the primary rotation source with the seat belt retracting member before the secondary rotation source is activated, while when the secondary rotation source is activated, the power transmission mechanism non-reversibly interrupts the connection between the first rotation source and the seat belt retracting member.