JPS6227481Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a seat belt length adjuster, and more particularly to an improvement of a pin provided on a tongue plate or the like around which a belt is wound.

[Conventional technology]

The conventional general technology regarding the seat belt length adjuster will be specifically explained below.

Figures 5 and 6 show a seatbelt length adjuster called a tilt lock type, which is attached to the tongue plate (for example, the
Publication No. 15442). In the figure, a tongue plate 1 is provided with a long hole 2 on the bottom surface, and a tongue plate 1
Guide parts 3, 3 on which the pin 5 slides in a direction substantially perpendicular to the long side of the elongated hole 2 are formed on both sides of the slot 2, and have a rectangular cross section around which the belt 4 is wound. The pin 5 is slidably held. To adjust the length of the belt, in Fig. 6, pull out the upper belt 4 in direction a to adjust the length, then pull out the lower belt 4 in direction b, and the pin 5 moves in direction R. By sliding, the belt 4 is held between the pin 5 and the inner end surface 2A of the elongated hole 2, and the belt 4 is
Withdrawals will be blocked.

[Problem that the invention attempts to solve]

However, in the conventional type, when an impactive tension is applied to the belt 4 in an emergency such as a collision, the pin 5 slides rapidly in the R direction, and the pin 5 slides rapidly in the R direction, causing the belt 4 to tighten more than necessary due to the inner end surface 2A of the elongated hole 2. Since the belt 4 is strongly pinched, there is a problem in that a large compressive force acts locally on the belt 4, which is undesirable.

The present invention was made to solve the above problems, and its purpose is to provide a seat belt length adjuster that prevents large compressive forces from acting locally on the belt at the belt locking part. be.

[Means for solving problems]

In the seat belt length adjuster of the present invention, a long hole through which the belt is inserted is formed in the bottom surface of a tongue plate, and a pin is slidably held in guide portions formed on both sides of the tongue plate, and the belt that passes through the long hole is wound around the pin and the length of the belt is changed by pulling one side of the belt, and large diameter portions having an outer diameter larger than the pin are provided on both ends of the pin.

[Effect]

According to the above configuration, the large diameter portion of the pin can freely slide on the guide portions formed on both sides of the tongue plate, and a certain gap is always created between the pin and the inner end surface of the elongated hole, so collisions can be avoided. Even if tension is applied to the belt in an emergency and the pin suddenly slides along the guide toward the inner end of the elongated hole, the belt will not be able to move between the pin and the inner end of the elongated hole more than necessary. It won't get pinched too hard.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

Note that the same components as those of the conventional seat belt length adjuster are given the same reference numerals.

As shown in FIGS. 1 to 4, the seat belt length adjuster of the present invention has a long hole 2 provided in the bottom surface of the tongue plate 1 through which the belt 4 is inserted. Guide parts 3, 3 are formed on both sides to hold the pin 5 and guide it in a direction substantially perpendicular to the long side of the elongated hole 2. As shown in FIG. 2, large diameter portions 5A, 5A are provided at both ends of the pin 5, and because of these large diameter portions 5A, 5A, the pin 5
A constant gap can always be maintained between the pin 5 and the inner end surface 2A of the elongated hole 2, so that when an impactive tension is applied to the belt 4, the belt 4 is connected to the pin 5 and the inner end surface 2A of the elongated hole 2.
The belt 4 is not pinched more strongly than necessary, and it is possible to prevent a large compressive force from acting locally on the belt 4.

Note that the shape of the large diameter portions 5A, 5A is not limited to the shape in which a step is provided over the entire circumference of the pin 5 as in the above embodiment; Any shape is acceptable as long as it can secure a certain gap.

[Effect of idea]

As described above, according to the present invention, by providing large diameter parts at both ends of the pin, a constant gap can always be maintained between the pin and the inner end of the elongated hole, so in case of an emergency such as a collision. The belt is not pinched more strongly than necessary, and it is possible to prevent a large compressive force from acting locally on the belt. Further, even if there is the gap, the belt will not loosen due to the tension acting on the belt, and safety can be ensured.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view showing an embodiment of the present invention, Fig. 2 is an enlarged perspective view of a pin with large diameter portions at both ends, and Fig. 3 is taken along line A-A after assembly in Fig. 1. 4 is a sectional view taken along the line B--B in FIG. 3, FIG. 5 is a perspective view showing a conventional example, and FIG. 6 is a sectional view taken along the line C--C in FIG. 5. 1...Tongue plate, 2...Long hole, 3...Guiding part, 4...Belt, 5...Pin, 5A...Large diameter part.

Claims (1)

[Scope of utility model registration request] A long hole through which the belt is inserted is formed in the bottom of the tongue plate, and a pin is slidably held in guide parts formed on both sides of the tongue plate, and the belt passing through the long hole is held on the pin. An adjuster for changing the length of a belt by winding the belt and pulling one side of the belt, the sheet being characterized in that a large diameter portion having an outer diameter larger than the outer diameter of the pin is provided at both ends of the pin. Belt length adjuster.