KR102388322B1 - Seat belt fasten apparatus and method of vehicle - Google Patents

Abstract

A seat belt fixing device and method for a vehicle, comprising: a spool having one end of the seat belt inserted inside and wound once, then pulled out and fixed, and then wound on an outer surface, wherein the end of the seat belt is sewn By providing a configuration that is continuously wound on the outer surface of the spool in a state in which it is fixed by the spool, the end of the seat belt is simply fixed to the spool without a sewing operation, thereby improving workability.

Description

Seat belt fastening device and method of automobile

The present invention relates to an apparatus and method for fixing a seat belt for a vehicle, and more particularly, to an apparatus and method for fixing a seat belt for a vehicle for fixing an end of a seat belt to a spool of a retractor.

BACKGROUND ART In general, a vehicle is provided with a seat belt device in order to ensure driving safety of occupants such as a driver.

The seat belt device is configured to restrain the occupant's body during a vehicle collision to prevent the occupant from jumping out of the vehicle body while preventing secondary collision and mitigating the impact.

The most common form of such a seat belt device is a three-point seat belt device in which a shoulder belt for restraining the shoulder and a lap belt for restraining the waist are combined.

The seat belt device is equipped with a seat belt woven in a band shape of synthetic fibers such as nylon or polyester, a retractor for storing the seat belt, and a seat belt when the seat belt is not used or the length of the belt is adjusted according to the seating posture of the occupant. Alternatively, it may include a buckle for releasing, a tongue plate, and a seat belt guide for fixing one end of the seat belt to the vehicle body.

The present applicant discloses a seat belt device technology in a number of patent documents 1 and 2, such as the following, and has applied for and registered a patent.

The retractor prevents an occupant wearing a seat belt from being thrown forward or from leaving the seat due to driving inertia, etc. when a vehicle is suddenly stopped or accelerated due to an accident or the like.

The retractor includes a locking device that allows the seat belt to be pulled out in a normal state when the seat belt is worn, but suppresses further pull-out of the seat belt when an acceleration of the seat belt pull-out is detected due to a vehicle collision or the like.

Republic of Korea Patent Registration No. 10-1758804 (Announced on July 18, 2017) Republic of Korea Patent Registration No. 10-1504228 (Announced on March 19, 2015)

1 is an exemplary view of a seat belt device according to the prior art.

1 illustrates a state in which the spool and the seat belt applied to the retractor of the seat belt device according to the prior art are combined.

As shown in FIG. 1 , the spool 1 is a portion on which the seat belt 2 is wound, and includes a cylindrical body and a spool shaft (not shown) protruding outward from both sides of the body. So, the spool 1 is rotatably coupled to the inside of the housing of the retractor using the spool shaft.

In the seat belt device according to the prior art to which the spool 1 configured as described above is applied, the end of the seat belt 2 is folded and sewn, and the pin 3 is inserted into the inner space of the sewn end of the seat belt 2 . In the spool 1, the end of the seat belt 2 having the pin 3 inserted therein is inserted and fixed in the space 4 formed inside the spool 1, and then the seat belt 2 is wound on the spool 1 .

Therefore, in the seat belt device according to the prior art, the process of sewing the end of the seat belt 2, the process of inserting the pin 3 into the end of the sewn seat belt 2, and the seat belt 2 on the spool 1 again ), there was a problem in that workability was lowered as it had to go through the process of inserting and fixing the ends of the ends.

In addition, as the spool applied to the seat belt device according to the prior art is manufactured using a metal material such as aluminum, there are problems in that the weight increases, the manufacturing cost increases, and it is difficult to manufacture in various structures.

SUMMARY OF THE INVENTION An object of the present invention is to provide a seat belt fixing device and a fixing method for a vehicle that can improve workability by simply fixing the end of the seat belt to a spool.

Another object of the present invention is to provide a seat belt fixing device and fixing method for an automobile capable of minimizing the weight of the spool to which the end of the seat belt is fixed and reducing manufacturing cost by manufacturing the optimized spool with various structures.

In order to achieve the above object, the seat belt fixing device for a vehicle according to the present invention includes a spool in which one end of the seat belt is inserted inside and wound once, and then drawn out and fixed, and then wound around the outer surface, The seat belt is characterized in that it is continuously wound around the outer surface of the spool in a state where the end is fixed by sewing.

In addition, in order to achieve the above object, the seat belt fixing method of a vehicle according to the present invention inserts the end of the seat belt into a spool installed inside a retractor, winds it once, and then pulls it out and sews it. It is fixed, and the seat belt is continuously wound around the outer surface of the spool.

As described above, according to the seat belt fixing device and the fixing method for a vehicle according to the present invention, the operability can be improved by simply fixing the end of the seat belt to the spool.

And according to the present invention, as the spool is manufactured using a synthetic resin material, various structures are applied to reduce the weight of the product, and the effect of reducing the manufacturing cost is obtained.

In addition, according to the present invention, it is possible to prevent damage or breakage of the spool by selectively applying a reinforcing member made of a metal material only to a portion coupled to the torsion bar requiring rigidity to reinforce the rigidity.

Moreover, according to this invention, the effect of improving the performance of a retractor and reducing the vibration noise of an extraction and a retraction force and a retractor is acquired.

Further, according to the present invention, the seat belt is fixed by using the friction force between the seat belt inserted into the intermediate layer insertion space of the spool and the outer surface of the central part of the body together with the fixing force generated by sewing the ends of the seat belt, and The effect that the seat belt can be smoothly wound on the spool by using the inclined surface formed on one side is obtained.

1 is an exemplary view of a seat belt device according to the prior art;
2 is a perspective view of a seat belt fixing device for a vehicle according to a preferred embodiment of the present invention;
3 is an exploded perspective view of the seat belt fixing device of the vehicle shown in FIG. 2;
4 is a cross-sectional view taken along line A-A' shown in FIG. 2;
Figure 5 is a perspective view seen from the rear side of the spool shown in Figure 2;
6 is an exploded perspective view of a seat belt fixing device for a vehicle according to another embodiment of the present invention;
7 is a perspective view of a seat belt fixing device for a vehicle according to another embodiment of the present invention.

Hereinafter, an apparatus and method for fixing a seat belt for a vehicle according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, terms indicating a direction such as 'left', 'right', 'front', 'rear', 'up' and 'downward' are defined as indicating each direction based on the state shown in each figure. do.

2 is a perspective view of a seat belt fixing device for a vehicle according to a preferred embodiment of the present invention, FIG. 3 is an exploded perspective view of the vehicle seat belt fixing device shown in FIG. 2, and FIG. 4 is A- shown in FIG. It is a cross-sectional view taken along line A', and FIG. 5 is a perspective view seen from the rear side of the spool shown in FIG.

As shown in FIGS. 2 to 4, the seat belt fixing device 10 for a vehicle according to a preferred embodiment of the present invention has a spool 20 and an end of the spool 20 formed in a substantially cylindrical shape are inserted into the spool 20, It includes a seat belt 30 wound around the outer surface of the spool 20 in a fixed state after being wound once.

The spool 20 is a portion on which the seat belt 30 is wound, and a spool shaft 22 rotatably coupled to a housing of a retractor (not shown) may be provided at the front end of the spool 20 .

Therefore, the retractor allows the seat belt 30 to be pulled out in a normal state when the seat belt 30 is worn. (30) suppresses the withdrawal.

In detail, the spool 20 is, as shown in FIGS. 2 to 5, the body 21 and the body 21 formed in a cylindrical shape to rotatably couple the body 21 to the housing of the retractor, the body 21 ) may include a spool shaft 22 protruding from the front end.

Inside the body 21 of the spool 20, a lock bar (not shown) of the locking device and a torsion bar 51 connecting the press head 50 and the body 21 are coupled.

At the front and rear ends of the torsion bar 51 , a coupling portion 52 having a plurality of protrusions 53 coupled to the inner surface of the front wall of the body 21 and the front wall of the stress head 50 , respectively, may be provided.

An insertion space 23 into which the end of the seat belt 30 is inserted is formed inside the body 21 , and a pair of flanges 24 may be formed at the front and rear ends of the body 21 , respectively.

The insertion space 23 communicates with the through hole 231 and the through hole 231 passing through the upper end of the body 21 so that the end of the seat belt 30 can be inserted, and the central portion 25 of the body 21 and It may include a cylindrical portion 232 formed in a substantially cylindrical shape to divide the edge portion (26).

The insertion space 23 may be formed to extend along the longitudinal direction of the body 21 to correspond to the width of the seat belt 30 .

As shown in FIGS. 4 and 5 , a coupling space 27 to which the torsion bar 51 is coupled is provided inside the central portion 25 of the body 21 .

A coupling groove 29 to which a plurality of protrusions 53 formed on the torsion bar 51 are coupled may be formed on the inner circumferential surface of the central portion 25 of the body 21 . The coupling groove 29 may be formed to extend to the inside of the front end wall of the body 21 along the longitudinal direction of the body 21 .

Therefore, the seat belt 23 is inserted into the insertion space 23 through the insertion hole 231 at the end of the center portion 25 of the main body 21 along the cylindrical portion 232 in a counterclockwise direction as seen in FIG. After winding, it is drawn out again through the insertion hole 231 , and is fixed to the seat belt 30 disposed outside the main body 21 by a sewing method.

To this end, a guide rib 28 is provided on the upper surface of the central portion 25 of the main body 21 to move the end of the seat belt 30 inserted through the insertion hole 231 to one side, for example, to the left. It may be formed to protrude by extending along the direction.

And in the process of winding the seat belt 30 with the end sewn on the outer peripheral surface of the right side with respect to the insertion hole 231 in the edge 26 of the body 21 around the spool 20, the seat belt 30 rotates clockwise. It may be formed with an outer diameter smaller than that of the left part so as to have the same outer diameter as the left part after being wound once along the .

In addition, at the right end of the edge portion 26 of the main body 21 , which is disposed on the right side of the insertion hole 231 , the seat belt 30 is inclined upwardly to the right so that the seat belt 30 can be smoothly wound around the spool 20 . An inclined surface 261 may be formed.

The spool 20 configured in this way may be manufactured using a synthetic resin material such as plastic, unlike the conventional manufacturing method using a metal material such as aluminum.

For example, the spool 20 may be manufactured by mixing glassfiber (GF) with polyamide (PA) in order to enhance heat resistance and mechanical strength.

As described above, according to the present invention, as the spool is manufactured using the synthetic resin material, the weight of the product can be reduced and the manufacturing cost can be reduced.

And the present invention can improve the performance of the retractor, and reduce the vibration noise of the extraction (extraction) and retraction (retraction) force and the retractor.

On the other hand, the outer surface of the central portion 25 of the main body 21 is inserted into the insertion space 23 and is in contact with the seat belt 30 wound around the outer peripheral surface of the central portion 25 once. ) can be fixed.

Accordingly, according to the present invention, the seat belt is fixed by using the friction force between the seat belt inserted into the insertion space and the outer surface of the central part of the body as well as the fixing force generated by sewing the ends of the seat belt, and the inclined surface formed on one side of the edge of the body can be used to smoothly wind the seat belt on the spool.

On the other hand, the main body 21 is formed in a cylindrical shape having a certain thickness, and a plurality of rectangular or 'X' shapes having a rectangular shape or an 'X' shape along the circumferential direction by providing a concave digging area inwardly on a part of the outer surface of the body 21 The ribs may be formed side by side.

Next, a fixing method for fixing the seat belt using the seat belt fixing device for a vehicle according to a preferred embodiment of the present invention will be described in detail.

First, the operator inserts the end of the seat belt 30 into the insertion hole 231 formed in the body 21 of the spool 20 , and inserts the end of the seat belt 30 into the cylindrical portion 232 of the insertion space 23 . ) along the central portion 25 of the main body 21 is wound once, and then taken out again through the insertion hole 231 .

Then, the end of the drawn out seat belt 30 is fixed with the seat belt 30 disposed outside the main body 21 by a sewing method.

In this way, in a state in which the end of the seat belt 30 is fixed, the seat belt 30 is continuously wound around the outer surface of the spool 20 , and the spool 20 is installed in the housing of the retractor.

Therefore, the retractor allows the seat belt 30 to be pulled out in a normal state when the seat belt 30 is worn. 30) to inhibit withdrawal.

Through the process as described above, in the present invention, as the spool is manufactured using the synthetic resin material, the weight of the product can be reduced and the manufacturing cost can be reduced.

And according to the present invention, the end of the seat belt can be stably fixed by using a spool having a simple structure.

In addition, the present invention can improve the performance of the retractor, and improve the extraction and retraction force and vibration noise of the retractor.

In addition, in the present invention, the end of the seat belt is wound once on the central part of the main body divided by the insertion space in the main body, then pulled out and sewn again, and the seat belt is fixed using the frictional force between the outer surface of the central part of the main body and the seat belt. In this way, it is possible to prevent the seat belt from being damaged by contact with the spool.

In addition, according to the present invention, as the seat belt is inserted and withdrawn into the insertion space through the insertion hole formed on one side of the spool, the seat belt can be smoothly wound by taking it out along the radial direction passing through the center of the body.

On the other hand, in the above embodiment, it has been described that a plurality of coupling grooves 29 are formed in which a plurality of protrusions 53 formed on the torsion bar 51 are coupled to the central portion 25 and the front wall of the main body 21, but this The invention is not necessarily limited thereto.

As described above, the body 21 is manufactured using a material made of synthetic resin.

If an accident such as a car crash occurs and the locking device is driven, in order to lock the rotational operation of the spool 20, the lock bar, the stress head 50, and the torsion bar 51 are operated by the locking device. The rotation stops momentarily.

Therefore, when the body 21 is manufactured using only synthetic resin material, the projection 53 of the torsion bar 51, the front end wall of the body 21, and the coupling groove 29 inside the body 21 are momentarily rotated in a state in which they are engaged with each other. When this is stopped, a reinforcing member may be required for a more stable and effective operation on the front wall of the body 21 connected to the spool shaft 22 .

6 is an exploded perspective view of a seat belt fixing device for a vehicle according to another embodiment of the present invention, and FIG. 7 is a perspective view of a seat belt fixing device for a vehicle according to another embodiment of the present invention.

As shown in FIG. 6 , the seat belt fixing device 10 for a vehicle according to an embodiment of the present invention further includes a reinforcing plate 60 installed inside the front end wall of the body 21 .

The reinforcing plate 60 may be manufactured in a substantially ring shape.

And a plurality of reinforcing protrusions 221 are formed protruding toward the front on the front wall of the body 21, and on the inner circumferential surface of the reinforcing plate 60, a plurality of reinforcing protrusions 221 formed on the front wall of the body 21 are coupled to the space between them. A plurality of coupling protrusions 61 may be formed to protrude.

For example, each of the reinforcing protrusions 221 may have a substantially arc-shaped cross-section, and each coupling protrusion 61 may have a substantially semicircular cross-section or a convex polygonal shape such as a triangular or square shape.

The reinforcing plate 60 is coupled to the front side of the front wall of the main body 21 so that the plurality of coupling protrusions 61 engage with the plurality of reinforcing protrusions 221 , respectively, or disposed in an insert molding method inside the front wall of the body 21 . can be

Alternatively, the plurality of coupling protrusions 61 protruding from the inner circumferential surface of the reinforcing plate 60 are coupled to the space between the plurality of reinforcing protrusions 221 protruding from the front end wall of the body 21 , and then the protrusion of the torsion bar 51 . (53) and may be directly engaged with each other.

As described above, the present invention provides a stable arrangement of the reinforcing plate on the body by engaging the coupling protrusion of the reinforcing plate, the reinforcing protrusion of the main body, and the protrusion of the torsion bar, and reinforcing the shear wall rigidity of the body using the reinforcing plate, It can provide more stable and effective operation and prevent damage.

As shown in FIG. 7 , the seat belt fixing device 10 for a vehicle according to another embodiment of the present invention further includes a plurality of reinforcing pins 62 installed on the front end wall of the body 21 .

The reinforcing pins 62 may be manufactured using a metal material such as iron, and may be coupled between each reinforcing protrusion 221 protruding from the front end wall of the body 21 or disposed by insert molding.

Therefore, the main body 21 may be coupled to the plurality of reinforcing protrusions 221 formed on the front end wall of the main body 21 using the plurality of reinforcing pins 62 .

As described above, the present invention provides a more stable and effective operation by arranging a reinforcing member such as a reinforcing plate or reinforcing pin made of a metallic material on the shear wall of the spool made of a synthetic resin material to reinforce the rigidity, damage can be prevented.

However, in the present invention, when the spool 20 is manufactured using a synthetic resin material having sufficient rigidity without applying a metallic reinforcing member, only the rigidity of the shear wall of the main body 21 prevents damage or damage to the spool. can also be prevented.

Although the invention made by the present inventors has been described in detail according to the above embodiments, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the gist of the present invention.

The present invention is applied to a seat belt fixing device technology for a vehicle that simply fixes the end of a seat belt to a spool.

10: vehicle seat belt fastening device
20: spool 21: body
22: spool shaft 221: reinforcing protrusion
23: insertion space 231: insertion hole
232: cylindrical part
24: flange 25: central part
26: edge 261: inclined surface
27: coupling space 28: guide rib
29: coupling groove
30: seat belt
50: thread head 51: torsion bar
52: coupling part 53: protrusion
60: reinforcing plate 61: coupling protrusion
62: reinforcing pin

Claims (12)

One end of the seat belt is inserted inside and wound once, and after being drawn out and fixed, it includes a spool wound around the outside,
The seat belt is continuously wound on the outer surface of the spool in a state where the end is fixed by sewing,
The spool includes a body formed in a cylindrical shape and
It includes a spool shaft that rotatably couples the main body to the housing of the retractor, and is manufactured using a material made of synthetic resin,
The end of the seat belt is inserted into the main body to form an insertion space to be wound once through one side of the main body, and a torsion bar connected to a locking device is coupled;
A reinforcing member manufactured using a metal material is coupled to the front wall of the body to reinforce rigidity,
The reinforcing member includes a plurality of reinforcing protrusions protruding from the front end wall of the body and a plurality of coupling protrusions formed on an outer circumferential surface of the torsion bar and a plurality of coupling protrusions directly engaged with each other. delete According to claim 1,
The insertion space includes an insertion hole formed through one side of the main body and pulled out again after one end of the seat belt is inserted;
and a cylindrical part communicating with the insertion hole and dividing the central part and the edge part of the main body,
The seat belt fixing device for a vehicle, characterized in that the seat belt is inserted into the insertion space through the insertion hole, and is drawn out through the insertion hole after winding the central part of the main body once. 4. The method of claim 3,
A guide rib for guiding the movement direction of one end of the seat belt inserted through the insertion hole is formed on the outer surface of the central part of the body to protrude;
A seat belt fixing device for a vehicle, characterized in that on the inner surface of the central portion of the body, coupling grooves corresponding to the plurality of projections formed on the torsion bar are formed to extend to the front end wall of the body. 4. The method of claim 3,
One side of the edge of the main body is formed to have an outer diameter smaller than that of the other side so that one end of the seat belt is inserted and wound around the edge of the body once to have the same outer diameter as the other side. belt fasteners. 6. The method of claim 5,
The seat belt fixing device for a vehicle according to claim 1, wherein an inclined surface is formed at an edge of the main body so that the seat belt is smoothly wound, and one end in contact with the insertion hole is inclined. delete According to claim 1,
A reinforcing member manufactured using a metal material is coupled to the front wall of the body to reinforce rigidity. According to claim 1,
A torsion bar connected to a locking device is coupled to the inside of the main body,
A seat belt fixing device for a vehicle, characterized in that, on the inner peripheral surface of the central portion of the main body, a plurality of coupling grooves to which a plurality of protrusions formed on the front end of the torsion bar are coupled are formed to extend to the inside of the front end wall of the main body. delete A method of fixing the end of a seat belt to a spool installed inside a retractor using the seat belt fixing device for a vehicle according to any one of claims 1, 3 to 6, 8 and 9. at,
A seat belt for a vehicle, characterized in that the end of the seat belt is inserted into the spool installed inside the retractor and wound once, then pulled out and fixed by a sewing method, and the seat belt is continuously wound on the outer surface of the spool. fixing method. 12. The method of claim 11,
(a) winding the end of the seat belt once through the insertion space formed in the spool;
(b) drawing the end of the seat belt to the outside and fixing it to the seat belt disposed outside of the spool by a sewing method; and
(d) continuously winding the seat belt having the end fixed on the outer surface of the spool in one direction.

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