JPS6311001B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a buckle device, particularly to a buckle device suitable for a seat belt of an automobile.

[Conventional technology and its drawbacks]

This type of buckle device is, for example,
It is known from Publication No. 26469 and Japanese Utility Model Application No. 52-99029. In both cases, a push button for uncoupling the buckle device is swingably supported. Therefore, when operating the push button, an operating force must be applied in a direction that causes the push button to swing, that is, in an oblique direction. This is relatively difficult when holding the buckle body in one hand and pressing the push button with the thumb.

Furthermore, a buckling device equipped with a roller-shaped latch member is known from Japanese Patent Application Laid-open No. 7149/1983. In this case, as shown in Figures 5 to 8 of the publication, since the roller-shaped latch member is supported by the tongue and the frame in a direction parallel to the direction in which the tongue is pulled, the latch member and the tongue The engagement connection is not strong and the latch member may come off unexpectedly.

[Purpose of the invention]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a buckle device in which the latch member and the tongue piece are firmly connected and the push button can be easily operated.

[Structure of the invention]

The purpose of this is to use a frame fitted into the case with a rectangular cross section, and a U-shaped cross section housed between the frame and the case so that it can slide in a direction perpendicular to the insertion direction of the tongue. pushbutton and
a latch member having both ends loosely fitted and supported in notches in the legs of the push button; and a spring biasing the push button in a direction to cause the latch member to engage with the groove of the tongue; The guide groove formed in the frame to guide and support the latch member and the groove of the tongue that engages with the latch member are inclined toward the tip of the tongue with respect to the direction perpendicular to the insertion direction of the tongue. achieved by doing.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, a buckle body 1 is shown.
This buckle body consists of a case 2 divided into two in the vertical direction, and a frame 3 fitted inside this case.
, a push button 4 slidably provided between the frame and the case 2, a spring 5 for returning the push button to the non-operating position, and a latch engaged with the tongue piece 6 (see FIG. 4). It consists of a member 7 and a spring 8 which urges the tongue piece 6 in the direction of its release. Only one side of Case 2 is shown. This case 2 has an opening 9 for inserting a tongue piece at its front end, and a mounting anchor 10 at its rear end.
(See FIG. 4). Furthermore, inside the case 2, there are formed a horizontally extending recess (hidden by the frame 3 in FIG. 1) for accommodating the frame 3, and a vertical recess 12 for accommodating the push button 4. ing. The frame 3 constitutes a strength member of the buckle main body, and as shown in FIG. It has a notch 14 for accommodating the spring 8 and a hole 15 for inserting the engagement pin of the mounting anchor 10. The push button 4 is provided so that its legs 16 straddle the frame 3, and the legs 16 are provided with notches 18 for accommodating both ends 17 of the latch member 7. A spring 5 is provided between the inner bottom 19 of the push button 4 and the lower end of the frame 3 for returning the push button 4 to its original position.

The tongue piece 6 inserted into the buckle body 1 is
It is provided with a hole 20 for inserting a seat belt (see FIG. 4), indicated by a two-dot chain line, and a groove 21 for engaging the latch member 7. Although this groove 21 is shown formed only on one side of the tongue piece 6, it can be formed on both sides of the tongue piece 6 as is well known.
The tip of the tongue 6 is beveled to lift the latch member 7.

The buckle device constructed as described above operates as follows. When the tongue piece 6 is not inserted into the buckle body 1, the push button 4 is pushed downward by the spring 5, as shown in FIG.
Therefore, the latch member 7 whose both ends 17 are gripped by the notch 18 of the push button 4
is guided by the push button 4 and deeply engaged in the guide groove 13 of the frame 13. next,
When the tongue 6 is inserted into the frame 3 through the opening 9 of the case 2, the sloping tip of the tongue 6 abuts the latch member 7 and lifts it. By lifting this latch member, the push button 4 is also lifted together against the spring 5 (see FIG. 3). At this time, since the moving direction A of the latch member 7 is inclined with respect to the moving direction B of the push button 4, the latch member 7 moves a little in the direction C of releasing the tongue piece 6 within the notch 18 of the push button 4. . When the tongue 6 is further inserted, the groove 21 of the tongue 6 reaches the position of the latch member 7, and the latch member 7 engages in the groove 21 of the tongue 6 under the action of the spring 5 (see FIG. 4). Thereby, a strong connection between the tongue piece 6 and the buckle body 1 is achieved.

When the push button 4 is pressed with a finger to release the buckle, the push button 4 carries and lifts the latch member 7, so that the latch member 7 is released from the groove 21 of the tongue 6. The tongue piece 6 is therefore ejected from the buckle body 1 by the compressed spring 8.

〔Effect of the invention〕

As described above, according to the present invention, the guide groove for guiding and supporting the latch member and the groove of the tongue are inclined toward the tip of the tongue with respect to a line perpendicular to the insertion direction of the tongue. As a result, the latch member acts like a so-called hook. Accordingly, the more the tongue is pulled by the seat belt, the more firmly the latch member and the tongue are engaged, so that the buckle will not be unintentionally released.

Furthermore, the push button is housed between the frame and the case so that it can slide in a direction perpendicular to the insertion direction of the tongue, so when releasing the buckle, you only need to press the push button with your thumb. There is no need to push diagonally and swing like in the past. Therefore, the unbundling operation of the buckle device is easy.

Furthermore, since the latch member is loosely fitted and supported by the push button, even if a large force is exerted on the tongue or the latch member, such as in the event of an accident, this force will not act on the push button. Therefore, since no load is applied to the push button, it is easy to operate the push button, and the push button can be made of a lightweight material with low strength such as plastic.

[Brief explanation of the drawing]

Figure 1 is a diagram showing the buckle body with one case removed, Figure 2 is a perspective view of the main parts of the buckle body, Figure 3 is a partially enlarged view of the buckle device showing the tongue insertion process, and Figure 4 FIG. 2 is a longitudinal cross-sectional view of the buckle device showing a tongue-locked state. Codes in the figure, 2...Case, 3...Frame, 5
... Spring, 6 ... Tongue piece, 7 ... Latch member, 13
... Guide groove, 16 ... Leg section, 17 ... End section, 18
...notch, 21...groove.

Claims (1)

[Scope of Claims] 1. A frame 3 fitted into the case 2 and having a rectangular cross section, and a tongue piece 6 stored between the frame 3 and the case 2 so as to be able to slide in a direction perpendicular to the insertion direction. a push button 4 having a U-shaped cross section, a latch member 7 whose both ends 17 are loosely fitted and supported in notches 18 of legs 16 of the push button 4; a spring 5 biasing the push button 4 in the direction of engagement with the latch member 7 and a guide groove 13 formed in the frame 3 for guiding and supporting the latch member 7; A buckling device characterized in that the groove 21 of the tongue piece 6 is inclined toward the tip end side of the tongue piece with respect to the direction perpendicular to the insertion direction of the tongue piece 6.