KR20210057385A - Seat belt retractor - Google Patents

Abstract

The present invention relates to a seat belt retractor. The seat belt retractor includes: a fixing frame formed into a U-shape by including both side walls with which a spool for winding a seat belt is combined to be rotatable, and a base frame connecting the bottoms of both side walls; and a support member fixed to a vehicle body, and combined directly with the tops of both side walls of the fixing frame to enhance hardness against vibrations or impacts delivered from the vehicle body. Therefore, the support member, which is made by fusing an existing support member for enhancing the hardness of a fixing frame with a bracket function for fixture to a vehicle body, is combined directly with the tops of both side walls of the fixing frame to enhance hardness, especially torsional hardness, against vibrations or impacts delivered from the vehicle body, thereby preventing deformation of the fixing frame.

Description

Seat belt retractor {SEAT BELT RETRACTOR}

The present invention relates to a seat belt retractor, and more particularly, to a seat belt retractor that prevents the withdrawal of the seat belt during deceleration of a vehicle.

In general, in a vehicle, a seat belt safety device is provided on a seat in order to secure the safety of the occupant. The seat belt safety device consists of a retractor that winds up a belt-shaped seat belt that secures an occupant on a spool or operates to be withdrawn, and a buckle into which a tongue fixed at one end of the seat belt is detachably inserted.

The retractor prevents a passenger wearing a seat belt from being bounced forward due to driving inertia or disengaging from the seat during sudden stops or rapid acceleration due to an accident of a vehicle. Such a retractor includes a locking device that allows the withdrawal of the seat belt in a normal state when the seat belt is worn, but suppresses the withdrawal of the seat belt any more when the withdrawal acceleration of the seat belt is detected due to a vehicle collision or the like.

For example, in Patent Document 1 and Patent Document 2 below, a retractor technology for controlling unwinding and unwinding operations of a seat belt is disclosed.

U.S. Patent No. 6,499,554 (registered on December 31, 2002) U.S. Patent No. 6,443,382 (registered on September 3, 2002)

The fixed frame of the seat belt retractor according to the prior art is formed in a'∪' shape in cross section, and a pair of support members is installed at the upper end of the fixed frame to prevent deformation of the fixed frame transmitted from the vehicle body.

However, the fixed frame applied to the seat belt retractor according to the prior art has a limitation in increasing the rigidity of the support member, and in particular, as it is vulnerable to torsion, there is a problem in that the fixed frame is deformed.

In addition, the seat belt retractor according to the prior art is fixed to the vehicle body using a separate mounting bracket.

Therefore, as the seat belt retractor according to the prior art has to go through the process of combining the fixing frame, the support member, and the installation bracket, respectively, there is a problem in that workability is deteriorated during assembly work, and the manufacturing cost is increased due to an increase in the number of parts. .

An object of the present invention is to solve the above-described problems, and to provide a seat belt retractor capable of increasing rigidity supporting both ends of a fixed frame and preventing torsional deformation.

Another object of the present invention is to prevent deformation of the fixed frame by combining a support member with an integrated bracket function installed on the vehicle body at the top of both open side walls of the fixed frame, and to improve workability during assembly work. To provide a tractor.

In order to achieve the object as described above, the seat belt retractor according to the present invention includes both side walls to which the spool on which the seat belt is wound is rotatably coupled and a base wall connecting the lower ends of the side walls to'∪'. It characterized in that it comprises a fixed frame formed in a shape, and a support member that is directly coupled to the upper end of both side walls of the fixed frame and fixed to the vehicle body, and to increase rigidity against vibration or impact transmitted from the vehicle body.

As described above, according to the seat belt retractor according to the present invention, the support member for increasing the rigidity of the fixed frame by coupling the support member to the open top of both side walls of the fixed frame and the support member function fixed to the vehicle body are integrated. The effect that it can be provided is obtained.

That is, according to the present invention, by combining a pair of first and second coupling protrusions respectively formed on the upper ends of both side walls of the fixing frame and the first and second coupling protrusions respectively formed on both sides of the support member, the fixing frame and the support member are directly connected to each other. Combine.

Accordingly, according to the present invention, by coupling the support member to the upper end of both side walls to increase the stiffness against vibration or impact transmitted from the vehicle body, particularly the torsional stiffness, the effect of preventing the deformation of the fixed frame is obtained.

In addition, according to the present invention, by integrating the function of the support member fixed to the vehicle body and the support member for increasing the rigidity of the conventional fixing frame, the coupling operation of the support member and the bracket and the riveting operation of the fixing frame and the support member are eliminated. , It simplifies the manufacturing process of the seat belt retractor, reduces the number of parts applied to the retractor, improves workability during assembly work, and reduces manufacturing costs.

1 is a perspective view of a seat belt retractor according to the prior art,
2 is a perspective view of the retractor shown in FIG. 1 from a different angle;
Figure 3 is a perspective view of the fixing frame shown in Figure 1,
4 is a perspective view of a fixing frame applied to the seat belt retractor according to the first embodiment of the present invention,
Figure 5 is an exploded perspective view of the fixing frame and the support member shown in Figure 4,
6 is a perspective view of a fixing frame applied to a seat belt retractor according to a second embodiment of the present invention,
7 is an exploded perspective view of the fixing frame and the support member shown in FIG. 6,
8 is a perspective view of a fixing frame and a support member applied to a seat belt retractor according to a third embodiment of the present invention.

Hereinafter, a seat belt retractor according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In the following, terms indicating directions such as'left','right','front','rear','upward' and'downward' correspond to the left and right, front and rear, up and down directions based on the state shown in the drawing. It is defined as indicating a direction.

First, prior to describing the configuration of a seat belt retractor according to the present invention in detail, the overall configuration of a general seat belt retractor will be briefly described with reference to FIGS. 1 and 2.

1 is a perspective view of a seat belt retractor according to the prior art, and FIG. 2 is a perspective view of the retractor shown in FIG. 1 from a different angle.

The seat belt retractor 10 according to the prior art, as shown in Figs. 1 and 2, is a fixed frame 20, a spool 30, a winding spring unit, a locking unit, a vehicle sensor unit, a locking prevention unit, and a left side. And the right housing (40,50).

The fixed frame 20 is a part to which the spool 30, the winding spring unit, the locking unit, the vehicle sensor unit and the anti-locking unit, and the left and right housings 40 and 50 are mounted.

The spool 30 is a part where the seat belt is wound. The spool 30 includes a cylindrical body rotatably operated on the fixed frame 20 and a pair of spool shafts protruding from the centers of both side surfaces of the cylindrical body. The pair of spool shafts are rotatably coupled directly or indirectly to the centers of left and right housings 40 and 50 fixed to both side walls 22 and 23 of the fixed frame 20.

The take-up spring unit includes a torsion spring accommodated in the right housing 50 and a spring seat in contact with the side of the fixing frame 20 so as to generate a restoring force for winding the pulled out seat belt.

The locking unit functions to stop the rotation of the spool 30 when the withdrawal acceleration of the seat belt is greater than or equal to a predetermined value, and includes a control disk, a latch, and a locking arm.

The control disk is coupled to a spool shaft of one side of the spool 30 via a bush and rotates together with the spool 30, and external teeth are formed on the outer circumferential surface of the control disk.

The latch is pivotably installed between the spool 30 and the control disk, and rotates together with the spool 30 and the control disk in normal times. Such a latch includes a latch tooth portion which pivots during rapid deceleration of the vehicle and is caught on the tooth portion formed in the fixed frame 20.

The locking arm is installed on the other side of the control disk so as to be rotatable together with the control disk, and operates as an inertial mass during rapid deceleration of the vehicle and is configured to be caught on the locking column formed inside the left housing 40.

3 is a perspective view of the fixing frame shown in FIG. 1.

Fixed frame 20 applied to the seat belt retractor 10 according to the prior art, as shown in Figure 3, the base wall 21 and the spool 30 penetrated through both side walls 22 rotatably installed. The cross section including ,23) is formed in an approximately'∪' shape, and in order to prevent deformation of both side walls 22 and 23 at the top of both side walls 22 and 23, a so-called'tie bar' A pair of support members 24 called are installed.

The support member 24 is formed in a substantially rectangular plate shape having a thickness of about several mm.

As described above, the thin plate-shaped support member 24 having a certain thickness has a limit in increasing rigidity and is vulnerable to torsion.

Accordingly, the fixed frame 20 applied to the seat belt retractor 10 according to the prior art has a problem in that deformation occurs due to vibration or shock transmitted from the vehicle body.

In addition, the seat belt retractor 10 according to the prior art connects a separate mounting bracket 25 to the base wall 21 of the fixing frame 20 in a rivet method, and uses the mounting bracket 25 to be attached to the vehicle body. It is fixed.

That is, the base wall 21 and the mounting bracket 25 of the fixing frame 20 are coupled to each other by combining rivets R at at least one or more positions.

In this way, the seat belt retractor 10 according to the prior art has to perform the work of coupling each of the fixing frame 20, the support member 24, and the mounting bracket 25, so that workability is lowered during assembly work. And, due to the increase in the number of parts, there is a problem in that the manufacturing cost increases.

In order to solve this problem, the present invention prevents deformation of the fixed frame by integrating the support member function and the installation bracket function to improve the rigidity of supporting the fixed frame by directly coupling the fixing frame and the support member or fixing it by welding. , By reducing the number of parts, it is possible to improve the workability of the assembly work and reduce the manufacturing cost.

Hereinafter, the configuration of the seat belt retractor described with reference to FIGS. 1 to 3 will be described.

Accordingly, in the case of the configurations applied to the seat belt retractor according to the present invention, the configurations shown in FIGS. 1 to 3 are the same as those shown in FIGS.

4 is a perspective view of a fixing frame applied to a seat belt retractor according to a first embodiment of the present invention, and FIG. 5 is an exploded perspective view of the fixing frame and a support member shown in FIG. 4.

Vibration transmitted from the vehicle body, as shown in FIGS. 4 and 5, is at the top of both side walls 22 and 23 of the fixed frame 20 applied to the seat belt retractor 10 according to the first embodiment of the present invention. The support member 100 is combined to provide a function of buffering and shock and a function of coupling the fixed frame 20 to the vehicle body.

The support member 100 is formed in an approximately square plate shape, and may have a buffer structure so as to buffer vibration and shock transmitted from the vehicle body. For example, a bent portion 110 that is bent upwardly convexly may be formed at a central portion of the support member 100.

A pair of first and second coupling protrusions 101 and 102 may be formed on both sides of the support member 100, respectively.

In detail, as seen in FIG. 5, a pair of first coupling protrusions 101 are formed on both sides of the front end of the support member 100, and first coupling protrusions ( A pair of second coupling protrusions 102 and a pair of coupling holes 103 may be formed at positions spaced apart from 101) by a predetermined interval.

The first coupling protrusion 101 is a support member 100 so that it can be coupled to the space between the pair of first coupling protrusions 26 formed on the upper ends of both side walls 22 and 23 of the fixing frame 20 to be described below. ) Grooves are formed on both sides of the portion connected to each other, so that the cross section may be formed in an approximately'T' shape.

The second coupling protrusion 102 is coupled to the space between the pair of second coupling protrusions 27 formed on the upper ends of both side walls 22 and 23 of the fixing frame 20.

To this end, a pair of second coupling protrusions formed on the rear ends of both side walls 22 and 23 of the fixing frame 20 at the front end of the portion connected to the support member 100 in the second coupling protrusion 102 ( In 27), a groove may be formed so that the second coupling protrusion 27 formed on the front side is coupled. In addition, a fixing hole 28 may be formed at the rear side of the groove so that the second coupling protrusion 27 formed at the rear of the pair of second coupling protrusions 27 is coupled.

That is, a pair of first coupling protrusions 26 and a pair of second coupling protrusions 27 may be formed on upper ends of both side walls 22 and 23 of the fixing frame 20 to protrude upward.

And the upper ends of the pair of first and second coupling protrusions 26 and 27 are bent so as to be close to each other after the first and second coupling protrusions 101 and 102 of the support member 100 are coupled, respectively, and both side walls 22, It is possible to prevent the support member 100 coupled to 23) from being separated.

As described above, the present invention incorporates a conventional support member function and a bracket function to form a pair of first and second coupling protrusions respectively formed on the top of both side walls of the fixed frame, and the first and second coupling stones respectively formed on both sides of the support member. By combining the parts, the fixing frame and the support member are combined.

Accordingly, the present invention can prevent deformation of the fixed frame by increasing the rigidity against vibration or impact transmitted from the vehicle body, particularly against torsion, by coupling the support member to the upper end of both side walls of the fixed frame.

That is, in the present invention, the upper surface of both side walls and the support member are in line contact with each other to increase the rigidity against the force transmitted to the fixing frame in the vertical direction.

In addition, the present invention can increase the rigidity against the force transmitted to the fixing frame in the lateral or twisting direction by using the coupling structure of the coupling protrusion and the coupling protrusion formed on the upper surface of both side walls and the support member.

Along with this, the present invention is applied to a retractor by integrating a support member function and a bracket function that are conventionally coupled to a fixed frame to remove the work of installing the support member and the bracket, respectively, and the riveting work of the fixing frame and the support member. By reducing the number of parts, manufacturing cost can be reduced, and workability can be improved during assembly work.

6 is a perspective view of a fixing frame applied to a seat belt retractor according to a second embodiment of the present invention, and FIG. 7 is an exploded perspective view of the fixing frame and the support member shown in FIG. 6.

Both side walls 22 and 23 and the support member 100 of the fixing frame 20 applied to the seat belt retractor 10 according to the second embodiment of the present invention are shown in FIGS. 6 and 7, They are joined by welding.

In detail, first and second bent portions 121 and 122 are formed at the upper ends of both side walls 22 and 23 of the fixed frame 20, respectively, by a predetermined interval.

That is, the pair of first bent portions 122 formed at the top of the front side portions of both side walls 22 and 23 are formed to be bent inward toward the central portion of the fixing frame 20 so as to be close to each other. In addition, a pair of second bent portions 122 formed at the upper ends of the rear portions of both side walls 22 and 23 may be formed bent inward toward the central portion of the fixing frame 20 as well.

Of course, the present invention is not necessarily limited thereto, and a pair of first and second bent portions 122 and 123 are changed to be bent toward the outside at both side walls 22 and 23 of the fixing frame 20 so as to be away from each other. It could be.

At both side ends of the support member 100, a pair of first and second fixing protrusions 104 and 105 at positions corresponding to the pair of first and second bent portions 121 and 122 formed on the upper ends of both side walls 22 and 23, respectively. ) Is formed.

Therefore, a pair of first and second fixing protrusions 104 and 105 formed on the support member 100 are seated on a pair of first and second bent portions 121 and 122 formed on the upper ends of both side walls 22, respectively. In FIG. 7 may be combined by a welding method of welding each point (P).

Meanwhile, in order to easily limit the seating position of the support member 100 in the process of seating the support member 100 on the upper surface of the pair of first and second bent portions 121 and 122 formed at the top of both side walls 22 and 23 , Each first bent portion 121 is formed on the upper surface of the fixing pin 123 is protruding, and each first fixing protrusion 104 of the support member 100, the pin hole 106 to which the fixing pin 123 is coupled Can be formed.

Therefore, in the process of seating the support member 100 on the upper ends of both side walls 22 and 23, the operator has the first bent portion 121 at the top of both side walls 22 and 23 in the pin hole 106 formed in the support member 100. The support member 100 can be easily seated in the correct position by being coupled to the positioning pin 106 formed in, and welding can be performed in a fixed state so that the seated support member 100 does not flow.

Of course, the present invention instead of forming the positions of the positioning pin 123 and the pin hole 106 in the first bent portion 121 and the first fixing protrusion 104, the second bent portion 122 and the second It may be formed on the fixing protrusion 105, or may be formed on all of the first and second bent portions 121 and 122 and the first and second fixing protrusions 104 and 105. Alternatively, the present invention forms a pin 123 located on one side arranged in a diagonal direction, for example, the left first bent portion 121 and the right second bent portion 122, as shown in FIG. 7, and The pin hole 106 may be formed in the first fixing protrusion 104 and the right second fixing protrusion 105, or may be changed to be formed in a diagonal direction at an opposite position orthogonal thereto.

However, the positioning pin 123 and the pin hole 106 are located at a position spaced apart from the welding point P so that they do not overlap with the welding point P formed in the center of the first and second bent portions 121 and 122. Can be formed.

Meanwhile, in the above embodiments, it has been described that the support members are coupled to upper ends of both sidewalls opened in the fixed frame having a'∪' shape in cross section, but the present invention is not limited thereto.

8 is a perspective view of a fixing frame and a support member applied to a seat belt retractor according to a third embodiment of the present invention.

In general, the seat belt retractor 10 is fixed to the vehicle body using brackets having different shapes depending on the type of vehicle and the position of the seat to be installed.

Therefore, the fixed frame 20 applied to the seat belt retractor 10 according to the third embodiment of the present invention may be arranged in an approximately'∩' shape in cross section as shown in FIG. 8 according to installation conditions. .

That is, the base wall 21 may be connected to upper ends of both side walls 22 and 23 and the lower ends of both side walls 22 and 23 may be opened.

So, in this embodiment, the support member 100 may be directly coupled to the open bottom of both side walls.

Here, the support member 100 may further include a bent portion 130 that is bent one or more times according to the shape of the vehicle body to which the fixing frame 20 is to be installed or the position of the seat.

The webbing guide 140 through which the seat belt webbing is drawn may be integrally formed on the support member 100.

Here, the position and shape of the webbing guide 140 may be variously changed according to the installation position and direction of the seat belt retractor 10, and the direction and position in which the seat belt webbing is to be pulled out.

As described above, according to the present invention, the fixed frame is standardized and manufactured in the same shape, and the installation direction of the fixed frame and the coupling position and shape of the support member can be changed according to the type and installation position of the vehicle.

Accordingly, the present invention can be applied to various types of vehicles and installation locations regardless of the type of vehicle and the installation location.

In addition, according to the present invention, by changing the position and shape of the webbing guide integrally formed with the support member, the position and direction in which the seat belt webbing is pulled out can be variously changed.

Through the process as described above, the present invention prevents deformation of the fixed frame by improving the rigidity of supporting the fixed frame by directly coupling or fixing the support member to the upper end of both side walls of the fixed frame by welding, and using the support member. Thus, as it can be installed on the vehicle body, the number of parts can be reduced to improve workability of assembly work and reduce manufacturing cost.

Although the invention made by the present inventor has been described in detail according to the above embodiment, the invention is not limited to the above embodiment, and it goes without saying that the invention can be changed in various ways without departing from the gist of the invention.

The present invention is applied to a technology that prevents deformation of a fixed frame applied to a seat belt retractor and improves workability during assembly work.

10: Seat belt retractor
20: fixed frame 21: base wall
22, 23: side wall 24: support member
25: mounting bracket R: rivet
26,27: first, second coupling protrusion 28: fixing hole
30: spool 40,50: left, right housing
100: support member 101, 102: first, second coupling protrusions
103: coupling hole 110: bend
104,105: first, second fixing protrusion 106: pin hole
121,122: first and second bent portions 123: positioning pin
130: bend 140: webbing guide
P: welding point

Claims (7)

A fixed frame formed in a'∪' shape including both side walls to which the spool on which the seat belt is wound is rotatably coupled and a base wall connecting the lower ends of the side walls,
A seat belt retractor comprising a support member that is directly coupled to upper ends of both side walls of the fixing frame and fixed to the vehicle body, and increases rigidity against vibration or impact transmitted from the vehicle body. The method of claim 1,
A pair of first coupling protrusions on both sides of the support member and
A pair of second coupling protrusions are formed at a position spaced apart from the pair of first coupling protrusions by a predetermined distance,
A seat belt retractor, characterized in that a pair of first and second coupling protrusions respectively coupled to the pair of first and second coupling protrusions are formed on upper ends of both side walls of the fixed frame. The method of claim 2,
Each of the pair of first coupling protrusions has grooves formed on both sides of the portion connected to the support member,
A seat belt retractor, characterized in that a groove is formed at a front side of a portion connected to the support member in the pair of second coupling protrusions, and a fixing hole is formed at a rear side of the groove. The method of claim 1,
First and second bent portions are formed at upper ends of both side walls of the fixed frame, respectively,
A seat belt retractor, characterized in that the first and second fixing protrusions are formed on both sides of the support member by welding while seated on the first and second bent portions. The method of claim 4,
At least one of the first and second bent portions is provided with a positioning pin defining a seating position of the support member,
A seat belt retractor, characterized in that at least one of the first and second fixing protrusions has a pin hole to which the positioning pin is coupled. The method of claim 1,
The fixed frame is disposed such that the lower ends of both side walls are opened according to the type of vehicle and the installation position,
The support member is a seat belt retractor, characterized in that coupled to the lower end of the open side wall of the fixed frame. The method of claim 1,
A seat belt retractor, wherein a webbing guide for guiding the seat belt webbing is integrally formed on the support member.

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