JPS6228892Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seatbelt buckle having a lock lever rotatably supported on a buckle body made of a steel plate.

Conventionally, in this type of seat belt buckle, the buckle body has been formed by punching and bending a steel plate. The lock lever has a complicated shape with an inwardly directed tongue guide and an arcuate pivot at the front end of the main plate, making it difficult to manufacture. Since the buckle body is fitted and supported by the arcuate pivot part of the buckle body and is rotatably provided on the buckle body, one end of the lock lever is There was a risk that the corner would bite into the pivot of the battle body.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a seat belt buckle that can facilitate the production of the buckle body and prevent the lock lever from digging into the buckle body.

An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a steel plate buckle body inserted into the cover 2. This is formed by bending a plate material punched into a predetermined shape at the middle part, and the front end, which is one end, is circular. It forms two continuous plates in an arc shape. In this buckle body 1, a tongue insertion opening 4 is formed in the upper part of the circular arc-shaped part 3 serving as the pivot, and rivet holes 5 are formed in the rear ends of the upper and lower plate parts 1a and 1b. Further, a lightweight hole 1d is formed in the upper plate portion 1a, and the upper plate portion 1a serves as a tongue guide portion. Reference numeral 6 denotes a holder anchor plate, which has a holder portion 7 formed at its rear end, and tongue separate portions 8, 8 protruding from its front end. Reference numeral 9 denotes an anchor plate, which is held in the buckle body 1 together with the holder anchor plate 6 while being supported by the holder portion 7 of the holder anchor plate 6, and is inserted into the rivet holes 5, 5.
Parts are riveted. Note that 10 is a webbing connected to the holder portion 7 of the holder anchor plate 6. 11 is the lock lever,
A lock portion 11a is protruded from the center of the rear end,
Also, on the left and right parts of the rear end, there are arm parts 1 extending rearward.
2 and 12 are formed, and arcuate pivoted supports 13 and 13 are formed on the left and right parts of the front end.
Therefore, this lock lever 11 has its pivot point 1
3 and 13 are fitted and supported by the arcuate portion 3 of the buckle body 1, and are rotatably supported by the buckle body 1. Reference numeral 14 denotes a leaf spring attached to the front end of the lock lever 11, which, as is well known, rotates the lock lever 11 upward and biases the tongue 15.
This is to press and bias the material in the removal direction (the opposite direction of arrow A). Reference numeral 16 denotes an operation plate, which is connected to the lock lever 11.
It is attached to the tips of the arm parts 12, 12, and faces the operation port 2a on the top surface of the cover 2.

In the above configuration, from the state shown in FIG.
5 in the direction of arrow A and inserted into the buckle body 1 through the tongue insertion hole 4, the tongue 15 is guided by the upper plate portion 1a serving as the tongue guide portion and engages with the lock portion 11a of the lock lever 11. Then, the tongue 15 is connected (see FIG. 3). Next, when the operation plate 16 is pressed downward from the state shown in FIG. 3, the lock lever 11 is rotated downward via the arm portions 12, 12. At this time, the tongue 15 also tries to rotate downward due to friction with the lock portion 11a of the lock lever 11, but since the tongue separate portions 8, 8 exist below the tongue 15, the tongue 15 is restricted to that position. Then, only the lock lever 11 is rotated downward, so that the lock part 11a of the lock lever 11 and the tongue 15 are disengaged, and at the same time, the tongue 1
5 is removed by the leaf spring 14 (opposite arrow A direction)
Then, the tongue 15 is released from the connected state.

As can be understood from the above-described embodiment, the present invention is a seat belt buckle having a lock lever that engages with a tongue and is pivotally supported on a steel plate buckle body, the buckle body being formed as a continuous two-plate shape with one end being arc-shaped, the pivoted portion of the lock lever being arc-shaped, and the pivoted portion being fitted and supported on the arc-shaped portion of the buckle body, which provides the following effects: That is, by bending a single plate material at its middle portion, a two-plate buckle body can be obtained, and in this case, the bending naturally provides the arc-shaped portion that serves as the pivot portion, and the tongue guide portion can also be naturally obtained by the upper plate portion, so that the manufacturing process is generally simplified and the buckle body can be manufactured very easily. Moreover, by making the back body two plates, it is possible to improve the strength compared to the conventional back body made of one plate, and therefore the plate thickness can be made thinner if the strength is to be the same as in the conventional case, and unlike the conventional case, it is also strong against loads from above. Furthermore, since the pivoted portion of the lock lever is formed in an arc shape and this pivoted portion is fitted and supported in the arc-shaped portion of the back body, the contact between the pivoted portion of the lock lever and the arc-shaped portion of the back body can be made to be a surface contact over a wide surface, so that, for example, even when the tongue is in a connected state and a force is applied in the direction of removal, the pivoted portion of the lock lever will not bite into the arc-shaped portion of the back body.
The lock lever can be rotated always reliably and smoothly, thereby enabling reliable connection and release operations.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a vertical sectional side view in a state before connection, FIG. 2 is an exploded perspective view, and FIG. 3 is a vertical sectional side view in a connected state. In the figure, 1 is the buckle body, 3 is the arc-shaped part, and 5 is the buckle body.
1 is a tongue guide portion, 11 is a lock lever, and 13 is a pivoted portion.

Claims (1)

[Scope of utility model registration request] A lock lever that engages with a tongue is rotatably supported on a buckle body made of a steel plate, and the buckle body is formed into a continuous two-plate shape with one end having an arc shape, and the lock lever is pivoted. A buckle for a seat belt, characterized in that a branch part is formed in a circular arc shape, and the pivoted part part is fitted and supported in a circular arc part of the buckle body.