JPH0130088Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a buckle device used in a seat belt device for protecting an occupant in a vehicle emergency, and used when the occupant attaches a tongue plate.

[Background Art and Issues to be Solved] In a seatbelt device, a tongue plate is attached to the tip of the webbing for restraining an occupant, and when this tongue plate engages with a buckle device, the occupant can put on the webbing. ing.

A buckle device is generally designed to engage only one tongue plate. For this reason, crew members must wear multiple pieces of webbing.
In point type seat belt devices, child restraint devices, etc., it is necessary to engage a plurality of tongue plates with a buckle device. In this case, it is necessary to prepare a buckle body having a plurality of locking mechanisms for engaging one tongue plate, resulting in a large and complicated operation.

The present invention takes the above facts into consideration, and aims to provide a buckle device that engages and holds two tongue plates, but has a simple structure and is easy to operate.

[Summary and operation of the invention] In the buckle device according to the invention, the relationship between a buckle main body, two tongue plates inserted into the buckle main body, and the two tongue plates provided and inserted into the buckle main body is improved. It has a lock plate which is biased in the mating direction and tilts to engage with one of the tongue plates when the tongue plate is inserted.

Therefore, when two tongue plates are engaged with the buckle body, the lock plate engages with these tongue plates within the buckle body to securely hold the tongue plates, and only one of the tongue plates is engaged. When inserted into the buckle body, the lock plate is tilted into engagement with the tongue plate.

[Embodiment of the invention] Figures 1 and 2 show a buckle device in which the present invention is applied to a child restraint device, in which two tongue plates 12 and 14 can be engaged with the buckle body 10. It's summery.

As shown in FIG. 3, the buckle body 10 is formed into a box shape with a synthetic resin buckle base 16 open at the upper end, and a cover 18 is attached onto the buckle base 16 to form the box shape.

Inside the buckle base 16, a tongue plate tip guide 17 is erected at the center, and a base plate 20 is inserted. The base plate 20 is formed by bending a plate material, and has a pair of bent parts 22 and 24 on both sides, a bent part 26 at the tip, and a buckle base 16 at the rear end.
A long hole 28 is formed in this protrusion. The tip of the crotch webbing 30 is locked into the elongated hole 28, as shown in FIG. The other end (not shown) of the crotch webbing 30 is locked to the base plate of the child restraint system, so that the crotch webbing 30 is placed between the child occupant's crotches.

Bent portions 22 from both sides of the base plate 20,
Rectangular notches 32 and 34 are formed from the front end of the base plate 20 to the bent portion 24, and a similar rectangular notch 36 is formed from the front end of the base plate 20 to the bent portion 26. These notches have protrusions 40, 42 protruding from both sides and the center of the lock plate 38.
44 are inserted, and notches 32, 34,
It is designed to be able to move up and down by 36 lengths.

Between the bending part 22 and the bending part 26 and the bending part 22
The space between the buckle base 16 and the bent portion 24 is an insertion portion for the tongue plates 12 and 14, which are inserted through the tongue insertion grooves 46 and 48 formed in the buckle base 16. Therefore, the insertion directions of the tongue plates 12, 14 form an included angle of about 90 degrees with respect to each other. Engagement protrusions 50 and 52 are protruded from the lock plate 38 toward the base plate 20 so as to protrude into the insertion paths of the tongue plates 12 and 14. They correspond to the matching holes 54 and 56. Further, tongue plates 1 are provided on both sides of the engaging protrusions 50 and 52.
Engagement protrusions 50, 5 to engagement holes 54, 56 of 2, 14
2 is inserted, the tongue plates 12, 14
The support protrusions 58, 60 are held so as to prevent rotation about the engagement protrusions 50, 52.

Compression coil springs 62 and 64 are interposed between the lock plate 38 and the buckle base 16 in correspondence with the engaging protrusions 50 and 52, and the lock plate 38 is biased toward the base plate 20 by these springs.

Therefore, when the tongue plates 12 and 14 are inserted together as shown in FIG.
However, when only one of the tongue plate 12 or the tongue plate 14 is inserted, the lock plate 38 tilts and rises with respect to the buckle base 16 as shown in FIG. 5B. It will mesh with the tongue plate.

A release button 66 is disposed between the base plate 20 and the cover 18, and passes through a spring insertion hole 68 formed in the base plate 20 to connect to a return spring 70 interposed between the release button 66 and the buckle base 16. Therefore, it is urged toward the cover 18. The engagement protrusions 72 protruding from both sides of the release button 66 correspond to the protrusions 40 and 42 of the lock plate 38, and when the occupant inserts his or her finger through the window 74 of the cover 18 and presses down the release button 66, Engagement protrusion 7
2 separates the lock plate 38 from the base plate 20.

The tongue plates 12 and 14 have shoulder webbings 76 and 78, respectively, as shown in FIG.
One end of these webbings is latched, and the other ends of these webbings are latched either directly to the body of the child restraint device or via a winding device.

Next, the operation of this embodiment will be explained.

If the tongue plates 12, 14 are inserted into the buckle body 10 after the child occupant is seated on the restraint device body (not shown), the child occupant can wear the crotch webbing 30 and shoulder webbing 76, 78.

That is, when the tongue plates 12, 14 are inserted through the tongue insertion grooves 46, 48, the lock plate 38 temporarily pushes down the compression coil springs 62, 64 against the biasing force, and the engagement protrusions 50, 52 are inserted into the engagement holes. 54 and 56, and are in a securely engaged state as shown in FIG.

Further, when only one of the tongue plates 12 and 14 is inserted, the lock plate 38 is tilted and raised by the biasing force of the compression coil springs 62 and 64, as shown in FIG. 5
2 securely engages the tongue plate. In this inclined engagement state, the amount of insertion of the engagement protrusions 50, 52 into the engagement holes 54, 56 is smaller than in the engagement state shown in FIG. 5A, but the tongue plates 12, 14 are approximately
Since it is inserted with an included angle of 90 degrees, the force to keep the tongue plate from coming out is comparable to that when both tongue plates are inserted.

Although the above embodiment shows a structure in which the present invention is used in a restraint device for children, the present invention can also be applied to a buckle device for restraining an adult passenger. In addition, the means for biasing the lock plate is not limited to a compression coil spring, but other elastic bodies can also be used, and the lock plate is not limited to those using multiple elastic bodies, but two tongue plates can be inserted. Any material may be used as long as it acts so as to tilt and engage with the tongue plate when one tongue plate is inserted.

[Effects of the invention] As explained above, in the buckle device according to the invention, the lock plate is configured to tilt and engage with one tongue plate when the other tongue plate is inserted, so that the two tongue plates are engaged and held. Even if it is a buckle device, it has a simple structure and has an excellent effect of being easy to operate.

[Brief explanation of the drawing]

Fig. 1 is a plan view with the cover and base plate removed showing an embodiment of the buckle device according to the present invention, Fig. 2 is a perspective view showing the correspondence between the buckle body and the tongue plate of the present embodiment, and Fig. 3 is a plan view of the buckle device according to the present invention. An exploded perspective view of the main body, FIG. 4 is a perspective view showing the engaged state of the tongue plate and the lock plate, FIG. 5 A is a sectional view showing the inserted state of two tongue plates, and FIG. 5 B is a one-piece tongue plate. FIG. 3 is a cross-sectional view showing the inserted state of the tongue plate. 10... Buckle body, 12, 14... Tongue plate, 30... Crotch webbing, 38...
... Lock plate, 50, 52 ... Engagement protrusion, 5
4...Engagement hole, 56...Support protrusion, 62, 64...
...Compression coil spring, 76, 78...Shoulder webbing.

Claims (1)

[Scope of utility model registration request] The buckle body, the two tongue plates inserted into the buckle body, and the two tongue plates provided on the buckle body and inserted are biased in the direction of engagement, and are tilted when one of the tongue plates is inserted. A buckle device comprising: a lock plate that engages with the one tongue plate.