JPS6225132Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a tongue plate of a seat belt buckle device used in automobiles, etc., and in particular, as shown in FIG. Two belt insertion holes 2 and 2'
This relates to the device 3 in which the two are provided in parallel. still,
Here, the front and rear of the tongue plate 3 used in this specification refer to the lower part in FIG. 1 as the front, and the upper part as the rear. Conventionally, the tongue plate 3 of this type of buckle device is
As shown in FIG. 1, the front insertion hole 2 and the rear insertion hole 2' have the same shape and the same size.

By the way, this type of tongue plate 3 is
A seat belt as shown in the figure, that is, one end of the belt 5 is attached to the outer rear lower part of the seat 6 with an anchor fitting 7.
At the same time, the other end is first inserted into the insertion holes 2 and 2' of the tongue plate 3 as shown in the figure, guided to the upper sash guide 8, folded back by the sash guide 8, and attached to the lower retractor. This is used in a seat belt system in which the belt 5 is wound around the seat belt 9 and the main body 10 of the buckle device for locking with the tongue plate 3 is provided at the inner rear lower part of the seat 6. In this seat belt system, when the tongue plate 3 is locked to the buckle body 10 and put into the attached state, the belt 5 is folded back at the front insertion hole 2 of the tongue plate 3,
They are angled backward and guided in the direction of the shoulder belt 5a and waist belt 5b, respectively. however,
In the case of the conventional tongue plate 4, at this time the third
As shown in the figure, the belt 5 guided to the shoulder belt 5a passing through the rear insertion hole 2' is obstructed by the end of the hole and cannot be smoothly guided in that direction.
Further, when the tongue plate 3 is dissociated from the buckle body 10 to be in the unattached state, the belt 5 is wound around the retractor 9 and is vertically arranged from the anchor fitting 7 to the sash guide 8 and then to the retractor 9. However, at this time, tongue plate 3
is pulled up together with the belt 5 until it comes into contact with the sash guide 8. However, in the case of the conventional tongue plate 3, as shown in FIG.
is bent to a large extent, and a large frictional force acts on that portion, so the winding force of the retractor 9 may not be able to insert it, and the belt 5 on the waist belt 5b side may be in a slack state.

In view of these circumstances, the present invention is designed to smoothly guide the belt 5, especially on the shoulder belt 5a side, in that direction when the seat belt is in the fastened state, and to guide the belt 5 smoothly in that direction when the seat belt is in the non-fastened state. It is an object of the present invention to provide a tongue plate that can be smoothly inserted through a front insertion hole 2 and a rear insertion hole 2'.

The present invention will be described below with reference to the embodiment shown in the drawings. In FIG. 5, 1 is the base, and 2 and 2' are front and rear belt insertion holes provided one after the other in the base 1. It is. Also 11
is a tip that is inserted into the buckle body 10 and locked. Furthermore, 12 is a synthetic resin coating formed on the surface of the base 1. In the case shown in this embodiment, the coating 12 covers the entire base 1, but is formed only on the edges of the belt insertion holes 2 and 2' and their surroundings. Also good. In the tongue plate 3 of the present invention, first, the aforementioned rear insertion hole 2' is formed to have a longer hole length than the front insertion hole 2. The hole edge 15 at the front part of the rear insertion hole 2' is curved backward, and the hole edge at the rear part of the rear insertion hole 2' is formed straight. Further, the front insertion hole 2 is formed such that the hole edge 16 at the front portion thereof is curved forward, and the hole width is substantially wider than that of the rear insertion hole 2'. Also, a synthetic resin coating 12 around the front part of the front insertion hole 2
is formed to be thinner than other parts over substantially the width of the belt. In the embodiment shown, the thin covering 12 is provided on both sides of the tongue plate 3, but it may be provided on one side.

This tongue plate 3 is used by inserting a belt 5 therethrough, as shown in FIG. 5b. In the tongue plate 3 of the present invention, as shown in FIG. 6, when the seat belt is put on, the belt 5 guided toward the shoulder belt 5a passes through the elongated rear insertion hole 2'. So you can smoothly guide them in that direction. Also, at this time, the belt 5, which is reversed at the front insertion hole 2, has a substantially wider hole width than the front insertion hole 2.
Since both ends thereof are substantially the same as those of the rear insertion hole 2', the edges can be smoothly reversed without being bent or doubled.

Furthermore, when the tongue plate 3 is in the uninstalled state, even when the tongue plate 3 comes to the position where it contacts the sash guide 8, the belt 5 passing through the insertion hole 2 in front of it is not bent much, as shown in FIG. A large frictional force does not act on this part, and also in the rear insertion hole 2', by forming the rear hole edge in a straight line, curvature in the width direction of the belt 5 can be avoided. However, the retractor 9 does not have a large amount of friction and can be passed smoothly by the sufficient winding force of the retractor 9. Therefore, it is possible to prevent the belt 5 on the waist belt 5b side from becoming loose.

Furthermore, at this time, the tip end 11 of the tongue plate 3 comes into contact with the thin coating 12 of the belt 5, so that it does not separate from the belt 5. Also, before this state is reached, the belt 5 is wound up by the retractor 9 and the tongue plate 3 is pulled up as shown by the broken line in FIG. When the tongue plate 3 is brought into contact with the belt 5, the belt 5 continues to be wound up, and the tongue plate 3 is held against the belt 5 by pressing the curved hole edge 15 at the front of the belt insertion hole 2' at the rear, as shown in the figure. It can be returned to the position facing directly. Therefore,
There is no fear that the occupant will be injured by the tip portion 11.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a tongue plate of a conventional buckling device, in which a is a plan view and b is a central vertical cross-sectional view at a. FIG. 2 is a diagram showing a seat belt using this type of tongue plate, and FIG. 3 is a diagram showing the state of the belt passing through the conventional tongue plate when the seat belt is in the attached state. , FIG. 4 is a diagram showing a state in which the tongue plate abuts against the sash guide and the belt cannot pass smoothly when the belt is not attached. FIG. 5 shows an embodiment of the tongue plate of the present invention, in which a is a plan view and b is a central vertical sectional view at a. FIG. 6 is a diagram showing a state in which the belt smoothly passes through the tongue plate when the seat belt is in the fastened state when using the tongue plate of the present invention. FIG. 7 is a diagram showing a state in which the belt smoothly passes through the front insertion hole even when the tongue plate contacts the sash guide when the belt is not attached. FIG. 8 is a diagram showing a state in which the tongue plate is pulled up together with the belt, comes into contact with the sash guide, and returns to a position directly facing the belt. DESCRIPTION OF SYMBOLS 1... Base, 2... Front insertion hole, 2'... Rear insertion hole, 3... Tongue plate, 5... Belt, 11... Tip, 12... Synthetic resin coating.

Claims (1)

[Claims for Utility Model Registration] 1. In a tongue plate of a buckle device, which has two parallel belt insertion holes one behind the other in the base of its rear part, the rear insertion hole of the two belt insertion holes. The length of the hole is longer than that of the front insertion hole, and the edge of the front part of the front insertion hole is curved forward to make the hole width substantially wider than that of the rear insertion hole. A tongue plate for a buckle device, characterized in that the edge of the front part of the rear insertion hole is curved rearward, and the edge of the rear part of the rear insertion hole is straight. 2 At least the edges and surroundings of the two belt insertion holes are covered with synthetic resin, and the synthetic resin coating around the holes in the front part of the front insertion hole is covered with approximately the width of the belt on at least one side. A tongue plate for a buckling device according to claim 1 of the utility model registration claim, characterized in that the tongue plate is thinner than other parts.