Belt tightener for seat belt
First Claim
1. A belt tightener for a seat belt, wherein said belt tightener pulls in a seat belt when deceleration of a moving vehicle exceeds a predetermined value, comprising:
- a casing extending in the longitudinal direction of the vehicle;
a compression spring having a first end and a second end and disposed in said casing;
a connecting member having a first end and a second end, with a buckle of the seat belt connected to said first end of said connecting member;
a supporting member supporting said first end of said compression spring;
a pull-in member contacting said second end of said compression spring, connected to said second end of said connecting member and adapted to move in an expansion direction of said compression spring following expansion of said compression spring;
wherein said pull-in member includes a locking part engageable with and disengageable from said supporting member to maintain said compression spring in a compressed state by causing said locking part to be engaged with said supporting member; and
a restricting member contacting said locking part for restricting movement thereof in the direction in which the engagement of said locking part is released;
wherein said seat belt is tightened by the expansion of said spring caused by the release of contact between said locking part and said restricting member and disengagement of said locking part from at least a portion of said supporting member when deceleration of the vehicle exceeds the predetermined value.
1 Assignment
0 Petitions
Accused Products
Abstract
A pre-loader device that quickly tighten a seat belt after a sudden deceleration of a vehicle is detected is disclosed herein. The pre-loader device includes a mass body and a casing housing the mass body with the mass body being movable in the longitudinal direction of the vehicle within the casing. A holder is positioned by a weak coil spring, and a strong coil spring is disposed between a flange part of the mass body and a flange part of the holder. A retainer and the holder hold therebetween stoppers disposed at the tip of plate springs that extend from the rear end of the mass body so as to position the mass body and maintaining the coil spring in a compressed state. A wire connects the rear end of the mass body to a seat belt buckle.
-
Citations
10 Claims
-
1. A belt tightener for a seat belt, wherein said belt tightener pulls in a seat belt when deceleration of a moving vehicle exceeds a predetermined value, comprising:
-
a casing extending in the longitudinal direction of the vehicle; a compression spring having a first end and a second end and disposed in said casing; a connecting member having a first end and a second end, with a buckle of the seat belt connected to said first end of said connecting member; a supporting member supporting said first end of said compression spring; a pull-in member contacting said second end of said compression spring, connected to said second end of said connecting member and adapted to move in an expansion direction of said compression spring following expansion of said compression spring; wherein said pull-in member includes a locking part engageable with and disengageable from said supporting member to maintain said compression spring in a compressed state by causing said locking part to be engaged with said supporting member; and a restricting member contacting said locking part for restricting movement thereof in the direction in which the engagement of said locking part is released; wherein said seat belt is tightened by the expansion of said spring caused by the release of contact between said locking part and said restricting member and disengagement of said locking part from at least a portion of said supporting member when deceleration of the vehicle exceeds the predetermined value. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A belt tightener for a seat belt disposed in a moving vehicle, said belt tightener comprising:
-
a casing having first and second hollow parts; supporting means disposed in said first hollow part for moving in a longitudinal direction of said casing in response to a deceleration force of said moving vehicle; means for supplying a force in a direction opposite to a direction of said deceleration force, said supplying means being connected to said seat belt, said supplying means disposed in said first hollow part, said supplying means including blocking means for blocking said supplying means in order to prevent said supplying means from supplying said force until said supporting means moves in said longitudinal direction by a predetermined distance which releases said supplying means, wherein said supporting means includes; a movable cylindrical holder having a flange at a far end thereof; and a coil spring disposed so as to be in contact with said flange of said cylindrical holder. - View Dependent Claims (9, 10)
-
Specification