US 5,707,080 A · Seat belt fastening device

Abstract

A seat belt fastening device has a seat belt buckle and a single casing in which a compression coil spring for pulling in slack of the seat belt is positioned between a retainer and a flange of a guide member. An inertial mass member is slidably disposed in the guide member. The coil spring is connected by a wire to a pulley unit through the retainer and guide member. The seat belt buckle is connected to the pulley unit by a wire. The wire is usually wound to the pulley unit which is locked by a control lever. When the inertial mass member moves under excessive deceleration, it drives operation levers and the control lever to unlock the pulley unit. As a result, the wire is pulled out from the pulley unit by the released compression spring. Incidentally, the wire is wound to the pulley unit so that the buckle is retracted into the casing and the slack of the seat belt is reduced.

Claims17

Dependent claims

A seat belt fastening device for a vehicle comprising:

a seat belt buckle for receiving a seat belt;
a casing secured to a vehicle body;
a guide member disposed in said casing;
an inertial mass member disposed in said guide member to move from setting position to triggering position when a designated deceleration is applied to said vehicle;
a main spring, disposed around said guide member, for storing spring back force;
a connecting member, having a retainer engaged with said main spring, for connecting said main spring with said seat belt buckle;
a holding member disposed in said casing for holding said connecting member and said main spring so that said main spring stores a prescribed spring back force when setting;
and
means, disposed in said casing and connected between said inertial mass member and said holding member, for triggering said holding member to release said stored spring back force so that said connecting member pulls in said seat belt buckle when said inertial mass member moves to said triggering position, thereby pulling in slack of a seat belt coupled to said seat belt buckle.

6 more elements

A seat belt fastening device for a vehicle comprising:

a seat belt buckle;
a casing secured to a vehicle body;
a guide member, having a slide inner surface and a flange, disposed in said casing;
a inertial mass member disposed in said slide inner surface to move from a setting position to a triggering position when designated deceleration is applied to said vehicle body;
a compression coil spring, disposed in said casing around said guide member, for storing repulsion force in one direction;
a connecting member disposed in said casing for connecting said compression coil spring with said seat belt buckle through said guide member;
a holding member disposed in said casing between said compression spring and said seat belt buckle for holding said connecting member so that said main spring stores a prescribed repulsion force when said inertial mass member is in said setting position;
and
means disposed between said inertial mass member and said holding member for releasing said repulsion force to pull in said seat belt buckle.

6 more elements

Dependencies are inferred from the claim text.

Seat belt fastening device

Life of this patent

Seat belt fastening device

Life of this patent

Abstract

Claims17