JPH0749257B2 - Tongue plate for seat belt - Google Patents

Description

The present invention relates to a tongue plate for a seat belt of a vehicle,
More specifically, the present invention relates to a tongue plate that can be reduced in weight without impairing usability.

[Prior Art] FIG. 5 is a plan view showing a generally-used tongue plate 10 for a seat belt which has been conventionally used. This tongue plate 10 has through-holes 14A, 14A for occupant restraining webbing.
A latch hole for engaging the occupant restraining webbing mounting portion 12 formed with B and a locking piece (not shown) on the bag side.
And the battery latch portion 16 formed with 18.

Since the tongue plate 10 has a small hole 18 in the latch portion 16, the weight of the tongue plate itself is relatively large, which is not preferable from the viewpoint of improving the retractability by the retractor retracting force using the normal spring force. .

From this viewpoint, a lightweight tongue plate 20 as shown in FIG. 6 has already been proposed (see Japanese Utility Model Laid-Open No. 60-139560). Although the tongue plate 20 has a slightly different shape in detail, it has a webbing attachment portion 22 in which webbing through holes 24A and 24B are formed and a latch hole 28 for engaging a locking piece (not shown) on the side of the bag. Backlash part formed
26 is the same as the tongue plate 10 described above. However, this tongue plate 20 has a latch hole.
28 is formed so as to be considerably extended and expanded toward the webbing attachment portion, thereby reducing the weight of the tongue plate itself.

[Problems to be Solved by the Invention] In the lightweight tongue plate 20 described above, when the push-out button of the bag is pushed with fingers, the tongue plate is pushed out by the pushing force of the push-out spring. , May interfere with the operator's finger.

The present invention has been made in view of the above facts, and an object thereof is to provide a lightweight tongue plate that does not interfere with an occupant's fingers or the like when the tongue plate is pulled out.

[Means for Solving the Problems] In order to achieve the above object, the present invention is to engage with a locking piece on the vehicle side in a tongue plate for a seat belt, which includes an occupant restraining webbing attachment portion and a vehicle latch portion. An expanded hole is provided closer to the occupant restraint webbing attachment side than the latch hole of the battery latch part, and the expanded hole has a narrow width toward the latch hole with an acute taper and is wider than the narrowest part at the narrowest part. It is characterized in that it is communicated with the above-mentioned latch hole.

[Operation] In the tongue plate according to the present invention having the above structure, the tongue plate is lightened by forming the enlarged hole,
Moreover, since the width of the enlarged hole is narrowed by an acute-angle taper toward the latch hole, even if the fingertip and the nail fall into the enlarged hole due to the change in the width of the enlarged hole, the fingertip and the nail will move as the tongue plate moves. It is pushed out of the hole by the guiding action of both side edges of the enlarged hole. Further, since the enlarged hole communicates with the latch hole that is wider at the narrowest portion than the narrowest portion, the tip of the claw is in a state in which the sliding resistance with the convergent side edges of the enlarged hole is released. Then it is quickly passed through the latch hole and out of the hole. Therefore, the tip portion of the claw is not subjected to an impact load by the tongue plate.

[Embodiment] FIG. 1 is a plan view showing an embodiment of the tongue plate according to the present invention, FIG. 2 is a perspective view thereof, and FIG. 3 is III-I of FIG.
It is a II sectional view.

The tongue plate 40 includes two webbing through holes 44A, 44.
A webbing attachment portion 42 having B formed therein and a bag latch portion 46 having a latch hole 48 for engaging with a locking piece (not shown) on the bag side are provided.

However, in the tongue plate 40, triangular protrusions 52A and 52A are formed on both sides of the enlarged hole 50 formed continuously from the latch hole 48, whereby the enlarged hole 50 becomes the latch hole.
It has a wedge shape that gradually narrows toward 48. That is, the enlarged hole 50 is tapered toward the latch hole 48 and has a narrow width.

An operation mode of the tongue plate 40 having the above structure will be described below with reference to FIG.

When the push-out button 32 of the bag 30 is pushed with the fingers 34 from the state of the chain double-dashed line in FIG. 4 where the tongue plate 40 is locked to the bag 30, the tongue plate 40 is pulled by the retractor winding force. Also, due to the pushing force of the spring in the bag device, the bag 30 moves in the direction of the arrow X in the drawing.
Is pulled out from. At this time, the tip end of the finger 34 for pressing the push-out button 32 and the pawl 36 tend to fall into the maximum width end of the enlarged hole 50 of the back latch 46 as shown in FIG. However, even if the tip of the finger 34 or the like falls into the enlarged hole 50, the enlarged hole 50 itself narrows toward the latch hole 48 with an acute-angled taper, so that the tongue plate 40 shown in FIG. Middle arrow Finger moves as you move in the X direction
The tip end of 34 and the claw 36 are the convergent side edges 50A, 50 of the enlarged hole 50.
It is guided by A from the inside, and as a result, the fingers 34
Is pushed out of the enlarged hole 50 in the direction of the arrow Y, that is, in the direction away from the bag latch portion 46.

Further, since the enlarged hole 50 is the narrowest portion between the protrusions 52A and 52A and is communicated with the latch hole 48 which is wider than the narrowest portion, the tip end of the claw 36 converges on the enlarged hole 50. Mold edges 50A, 50
In the state where the sliding resistance with A is released, it is quickly passed through the latch hole 48 and out of the hole. Therefore, the tip portion of the claw 36 is not subjected to an impact load by the tongue plate 40.

Also, since the pulling speed of the tongue plate 40 is relatively high, the pawl 36 is
It is very unlikely that the reciprocating motion of the finger 34 such that the tip end of the finger moves toward the back latch portion 46 and drops into the latch hole 48 again. Therefore, the finger 34 remains pushed out from the enlarged hole 50.

In the above-mentioned embodiment, the size of the enlarged hole 50 can be made much larger than that of the illustrated embodiment as long as the strength of the tongue plate is allowed, thereby making the tongue plate lighter. Can be planned.

It is also effective to form a large number of small holes in order to reduce the weight of the tongue plate.

[Effects of the Invention] As described above, according to the tongue plate of the present invention, it is possible to reduce the weight of the tongue plate due to the enlarged holes that are present on the battery latch portion, and the good tractor winding performance can be obtained. In addition to being obtained, the width of the enlarged hole is narrowed by an acute taper toward the ratchet hole to prevent falling of the fingertip, and it communicates with the ratchet hole wider than the narrowest part at the narrowest part. It has an excellent effect of preventing interference with the fingertips of the user when the tongue plate is pulled out from.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the tongue plate according to the present invention, FIG. 2 is a perspective view thereof, and FIG. 3 is FIG.
A line sectional view, FIG. 4 (A) is a partially enlarged perspective view showing an operation mode of the first embodiment, and FIG. 4 (B) is a side view showing the relationship between the bag and the tongue plate, FIG. 5 and FIG. FIG. 6 is a plan view showing a conventional tongue plate. 40,60 ...... Tungs plate, 42 ...... Webbing attachment part, 44A, 44B ...... Webbing through hole, 46 ...... Back latch part, 48 ...... Latch hole, 50 ...... Expansion hole, 52A, 52B ...... Projection part.

Claims (1)

[Claims] 1. A seatbelt tongue plate comprising a passenger restraining webbing attachment portion and a vehicle latch portion, and a passenger restraint webbing attachment portion side rather than a latch hole of the buckle latch portion for engaging with a buckle side locking piece. An enlarged hole is provided in the sheet, and the enlarged hole is narrowed by a taper of an acute angle toward the latch hole and is communicated with the latch hole which is wider than the narrowest portion at the narrowest portion. Belt tongue plate.