JPH0214998Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a return spring for a seat belt in a vehicle.

Figure 1 shows a three-point seat belt in the driver's seat as an example of an automobile seat belt system, where 1 is the side door in a slightly open state, 2 is the seat, and 3 is the seat belt in the driver's seat.
5 is a seat belt that is a so-called uni-belt in which a waist belt 4a and a shoulder belt 4b are connected; 5 is a final anchor portion attached to the lower end of the door; 6 is a buckle attached to the floor (or seat side) on the center side of the vehicle; 7 is a tongue with a through ring that is passed through the seat belt, 8 is a shoulder anchor with a through ring attached to the rear upper part of the door, and 9 is a retractor installed inside the door.

A conventional return spring incorporated into the final anchor portion 5 has a shape as shown in FIG. 2 (A, B, C). Figure 2A
The wire shown in FIG. B is made of spring wire, and the wire shown in FIG. In the figure, a1, b1, and c1 are ends that are locked and held by the anchor plate, and a2, b2, and c2 are free ends that are inserted and locked into the cylindrical body of the belt protector, and the protector is always attached to the door lining. This biases the storage state toward the retracted state. c3
indicates coil winding. The configurations shown in Figures A and B above had poor fitting properties for the user (no sagging), poor winding and pulling properties of the belt, and low durability of the bent portion. C
The shape shown in the figure was designed to eliminate the defects of the shapes shown in Figures A and B above by using the coil winding part as the center of bending and rotation, but in reality, the center of rotation drops when bending and irregularities occur in the lateral direction. There is a problem that such displacement occurs, weakening the return force, and making it easier for the spring to come off from being held by the anchor plate.

The present invention was made in order to eliminate the above-mentioned problems of the conventional products, and includes a common shaft rod at the center of a pair of coil windings in a spring made of spring wire with coil windings (the conventional spring shown in Fig. 2C). To provide a return spring for a vehicle seat belt that is inserted through the vehicle.

The present invention will be explained below based on the drawings.

FIG. 3 is a sectional view along the vehicle width direction of the final anchor portion 5 of the three-point seat belt shown in FIG. 1, where 1a is the door inner panel, 1b is the door lining, 11 is the anchor plate, and 11a is the same. The cut and raised piece provided on the plate, 11c, is the same ring part, 1
2 is a clip; 13 is an anchor bolt for fixing the anchor plate 11 to the door inner panel 1a; 14
14a is a return spring, 14a is a separated end of the return spring 14 on the anchor plate attachment side, 14c is a coil winding of the return spring 14, 15 is a common shaft rod, and 16 is a seat belt whose end is fixed to the ring portion 11c of the anchor plate. A cylindrical protector made of soft resin is coated on the end of the belt.

FIG. 4 shows a perspective view of the anchor plate 11. A notch 11b is provided in the center of the cut-and-raised piece 11a, into which a clip 12 is fitted, as shown in FIG. 3, after the return spring 14 is introduced. 11d is a small hole through which the separated end 14a of the return spring 14 is guided.

FIG. 5 shows a perspective view of the return spring 14. This return spring itself is shown in Figure 2C.
It is the same type as the conventional spring wire material with coil winding shown in . That is, it is a spring wire work of two parallel stripes with one end bent in a U-shape, and a coil winding 14c is provided at an intermediate portion between the bent end 14b side and the separated end 14a side, respectively. The paired coil windings are supported by a common shaft rod 15 inserted through the center of the coils. Therefore, the two separated ends 14a, 14a are curved upward,
The small hole 1 of the anchor plate is formed to open outward.
1d (see Fig. 6) and is set on the lower surface of the plate, the spring pressure due to the upward curvature and the outward opening shape not only prevent the detached end 14a from coming off from the anchor plate but also hold it in place. Assure.

In the configuration of the above embodiment, since the common shaft rod 15 is inserted through the pair of coil windings 14c provided at the middle part of the spring, the protector 1
Spring bending end 14b carried out via 6
The center of rotation during the raising and lowering movement of the coil does not fall down like in the conventional case, but is supported by the common shaft rod 15, and also prevents the coil winding 14c from irregularly displacing in the front-rear, right-left, and left-right lateral directions. As a result, the bending and bending of the spring can be performed extremely normally, smoothly, and strongly, and the durability of the coiled portion can also be improved. Therefore, when the belt is tightened, the belt has a good fit, and when the belt is released, the protector strongly returns to the stored position along the door lining, allowing the occupant to move more freely.

[Brief explanation of drawings]

Figure 1 is a perspective view of a three-point seatbelt attached to the driver's seat of a car. Figure 2 A, B, and C are perspective views of conventional return springs, where A is a spring steel plate, B is a spring wire, and C is a coil winding. FIG. 3 is a cross-sectional view along the vehicle width direction of a final anchor portion equipped with a return spring according to the present invention, FIG. 4 is a perspective view of the anchor plate in FIG. 3, and FIG. This figure is a perspective view of the return spring in FIG. 3, and FIG. 6 is a perspective view of the main part in FIG. 3. 3... Seat belt, 5... Final anchor portion, 11... Anchor plate, 14... Return spring, 14a... Separated end (forming the other end side), 14b... End bent into a U-shape part (forming one end side), 14c... coil winding, 15... common shaft rod, 16... protector.

Claims (1)

[Scope of utility model registration request] One end of the seat belt is covered with a protector, and a pair of coil windings is formed at the intermediate portion of each of two parallel spring wires whose one end is bent into a U-shape on the final anchor part that fixes the one end. At the same time, in the seat belt return spring, the one end of which is interposed in the protector and the other end of which is held by the anchor plate and is disposed to bias the protector portion in the retracted direction so that the protector portion is always in an upright state, A return spring for a seat belt, wherein the pair of coil windings of the return spring are supported by a common axis rod passing through the center of each coil.