Seat belt retractor and seat belt apparatus
First Claim
Patent Images
1. A seat belt retractor comprising:
- a cylindrical spool for winding and unwinding a seat belt;
a motor comprising a motor shaft disposed coaxially with the spool in a columnar space inside the spool, wherein the motor generates a rotary driving force for rotating the spool in a belt winding direction and a belt unwinding direction;
a reduction mechanism disposed between the spool and the motor for reducing and transmitting the rotation of the motor; and
a first energy absorbing mechanism for absorbing impact energy on an occupant when the spool rotates in the belt unwinding direction in an event of an emergency.
1 Assignment
0 Petitions
Accused Products
Abstract
The disclosed seat belt retractor may comprise an electric motor which can be disposed inside a cylindrical spool. The rotation of the electric motor may be transmitted to the spool via a sun gear, planetary gears and a carrier. In the event of an emergency, a locking mechanism may be actuated by the action of a deceleration sensor to lock the rotation of a locking base in the belt unwinding direction. However, the spool is about to continue to rotate in the belt unwinding direction due to the inertial movement of an occupant. Thus, an energy absorbing mechanism may be used to absorb the impact energy on the occupant and limiting the load on a seat belt 6 so that the load is not too large.
33 Citations
16 Claims
-
1. A seat belt retractor comprising:
-
a cylindrical spool for winding and unwinding a seat belt;
a motor comprising a motor shaft disposed coaxially with the spool in a columnar space inside the spool, wherein the motor generates a rotary driving force for rotating the spool in a belt winding direction and a belt unwinding direction;
a reduction mechanism disposed between the spool and the motor for reducing and transmitting the rotation of the motor; and
a first energy absorbing mechanism for absorbing impact energy on an occupant when the spool rotates in the belt unwinding direction in an event of an emergency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A seat belt retractor comprising:
-
a cylindrical spool for winding and unwinding a seat belt;
a motor comprising a motor shaft disposed coaxially with said spool in a columnar space inside the spool, wherein the motor generates a rotary driving force for rotating the spool in a belt winding direction and a belt unwinding direction;
a first energy absorbing mechanism for absorbing impact energy on an occupant when the spool rotates in the belt unwinding direction in an event of an emergency; and
a first locking mechanism having a first locking member, wherein the first locking mechanism is configured to rotate together with the spool in a normal state and configured to be actuated in the event of an emergency. - View Dependent Claims (15, 16)
-
Specification