KR102261365B1 - Split buckle structure - Google Patents

Abstract

The present invention relates to a seat belt buckle for a vehicle, and more particularly, a split that distributes the load concentrated on the chest of a dummy by separating the shoulder buckle and the lap buckle during a front collision, thereby spacing the shoulder belt and the chest of the dummy It relates to a buckle structure and a seat belt control method to which the same is applied.

Description

Split Buckle Structure {SPLIT BUCKLE STRUCTURE}

The present invention relates to a seat belt buckle of a vehicle, and more particularly, a split that distributes the load concentrated on the chest of a dummy by separating the shoulder buckle and the lap buckle in the event of a front collision, thereby spacing the shoulder belt and the chest of the dummy It relates to a buckle structure and a seat belt control method to which the same is applied.

In the North American NCAP (New CarAssessment Program) crash test, as the most recently designed THOR (Test device for Human Occupant Restraint) dummy was introduced instead of the existing H3 dummy due to the change of the test method, the regulation on chest injuries is expected to be strengthened. do. That is, compared to using only one displacement sensor (red dot) of the potentiometer method using the conventional H3 dummy for chest displacement of the dummy, in the NCAP to be strengthened next, as shown in FIG. 1 , the upper right, lower right, and upper Infra-Red Telescoping Rod for the Assessment of Chest Compression (IR-TRACC) is installed on the left and lower left sides, respectively, and the chest displacement is measured by a total of four sensors (red dots). In addition, as shown in the graph of FIG. 2 , as the THOR dummy is changed compared to the existing test method, a chest deformation of 25 mm occurs only with a load of 20% to 50% compared to the existing H3 dummy, thereby increasing the sensor sensitivity.

Due to this reinforced North American NCAP crash test method, the sensitivity to chest deformation of the dummy is increased, and the chest displacement measurement position is changed from 1 point to 4 points. There is a problem in that the crash test performance of the vehicle is relatively deteriorated as it increases by about 10 times.

Republic of Korea Patent Registration No. 10-1032990 (2011.04.27)

The present invention has been devised to solve the above problem, and a split buckle structure that distributes the load concentrated on the chest of a dummy by separating the shoulder buckle and the lap buckle during a front collision, thereby spacing the shoulder belt and the chest of the dummy, and An object of the present invention is to provide an applied seat belt control method.

The split buckle structure according to an embodiment of the present invention includes: a tongue portion 110 consisting of a shoulder portion tongue 111 connected to the shoulder belt 120 and a wrap portion tongue 112 connected to the wrap belt 160; and a buckle part 210 consisting of a shoulder buckle 221 and a wrap buckle 222 that are respectively fastened to the shoulder tongue 111 and the wrap tongue 112, and when an impact to the vehicle occurs, each buckle It may be characterized in that the shoulder belt 120 is spaced apart from the driver by a predetermined distance by being separated from each other and the shoulder buckle 221 is rotated forward.

In addition, the shoulder buckle 221 and the wrap buckle 222 strap for fastening the shoulder buckle 221 and the wrap buckle 222 to one side of the seat, respectively, may be further included.

In addition, the strap part may further include a coupling member 510 for coupling or separating the shoulder part buckle 221 and the wrap part buckle 222 from each other.

In addition, the coupling member 510 may be provided to mutually penetrate the shoulder buckle 221 strap and the wrap buckle 222 strap.

In addition, the strap part may further include a gas generator for separating the shoulder part buckle 221 and the wrap part buckle 222 from each other by cutting the coupling member 510 when an impact occurs on the vehicle.

In addition, it may further include a pre-tensioner 300 coupled to the lower end of the strap to reduce a load applied to the shoulder belt 120 when a vehicle impact occurs.

In addition, the pre-tensioner 300 may be characterized in that it is fastened to any one of the shoulder buckle 221 strap and the wrap buckle 222 strap.

In addition, when any one of the shoulder buckle 221 strap and the wrap buckle 222 strap is pulled out by the pre-tensioner 300 when the vehicle is impacted, the coupling member may be cut.

In addition, the tongue part 110 may include a tongue coupling part so that the shoulder part tongue 111 and the wrap part tongue 112 can be coupled or separated from each other.

In addition, the tongue coupling part may include a magnetic part 410 capable of coupling or separating the shoulder part tongue 111 and the wrap part tongue 112 using magnetism.

In addition, the tongue coupling part may include a tongue fastening pin 430 through which the shoulder part tongue 111 and the wrap part tongue 112 can be separated from each other by the tongue part 110 being fastened to the buckle part 210 . have.

In addition, the tongue coupling part may further include a pin release guide 433 for releasing the tongue coupling pin 430 when the tongue part 110 is fastened to the buckle part 210 .

A seat belt control method to which a split buckle structure is applied according to an embodiment of the present invention includes the steps of: detecting whether a front collision of a vehicle occurs; When a collision occurs, the gas generator 520 provided in the buckle strap portion is ignited; Cutting the coupling member 510 by the high-pressure gas generated from the gas generator; The step of separating the buckle part 210 from each other; The step of rotating the shoulder buckle toward the front around the seat fastening portion 230; may be made including.

A seat belt control method to which a split buckle structure is applied according to an embodiment of the present invention includes the steps of: detecting whether a front collision of a vehicle occurs; igniting the gas generator 330 provided in the pre-tensioner 300 when a collision occurs; Step of tensioning the buckle strap to which the pre-tensioner 300 is fastened; cutting the coupling member 510 as the buckle strap is withdrawn; The step of separating the buckle part 210 from each other; The step of rotating the shoulder buckle toward the front around the seat connection 230; may be made including.

The present invention has the effect of separating the shoulder belt 120 from the chest of the dummy by separating the shoulder buckle and the lap buckle during a collision.

In addition, by separating the shoulder belt 120 from the chest of the dummy, there is an effect of reducing the amount of chest deformation caused by the seat belt during a front collision.

1 is a view schematically comparing the mounting position of the chest displacement sensor according to the change of the dummy.
Figure 2 is a graph schematically showing the sensitivity to chest deformation according to the change of the dummy.
3 is a view schematically illustrating an operating state of a split buckle structure according to an embodiment of the present invention when a collision occurs;
4 is a view schematically showing a split buckle structure according to an embodiment of the present invention.
5 is a view schematically showing a coupling structure of a tongue coupling part;
6 is a view schematically illustrating a buckle strap connection structure in a split buckle structure according to an embodiment of the present invention.
7 is a view schematically illustrating a buckle strap connection structure to which a pre-tensioner 300 is applied in a split buckle structure according to another embodiment of the present invention.
8 is a view schematically showing an operating state at the time of collision of the split buckle structure to which the pre-tensioner 300 is applied.
Figure 9 is a graph showing the chest deformation according to the separation amount of the shoulder buckle with respect to the lap buckle.
Fig. 10 is a diagram schematically illustrating each graph of Fig. 9;

The principle that terms or words used in the present specification and claims should not be limited to their ordinary or dictionary meanings, and the inventor may appropriately define the concept of the term in order to best describe his invention. It should be interpreted as meaning and concept consistent with the technical idea of the present invention based on the Accordingly, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention and do not represent all the technical spirit of the present invention, so various equivalents that can replace them at the time of the present application It should be understood that there may be water and variations. In addition, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the gist of the present invention will be omitted. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 9 and 10 , it can be confirmed that the displacement sensed by the sensor disposed in the upper right corner is the largest among the four chest displacement sensors applied to the THOR dummy. This means that the dummy moves forward due to inertia during a front collision, and the load acting on the right upper chest by the seat belt is the largest. Therefore, in the present invention, it is said that the purpose of the present invention is to reduce the amount of chest deformation detected by the upper right sensor by distributing the load acting on the upper right chest of the dummy.

3, the split buckle structure according to an embodiment of the present invention is

Tongue 110 consisting of a shoulder tongue 111 connected to the shoulder belt 120 and a wrap tongue 112 connected to the wrap belt 160, the shoulder tongue 111 and the wrap tongue 112 are respectively fastened The shoulder buckle 221 strap for fastening the buckle part 210, the shoulder buckle 221, and the wrap buckle 222 comprising the shoulder buckle 221 and the wrap buckle 222 to one side of the seat, respectively. And it may be configured to include a strap portion consisting of a wrap buckle 222 strap.

Basically, in the present invention, when the tongue part 110 is fastened to the buckle part 210, the shoulder part tongue 111 and the wrap part tongue 112 maintain a mutually coupled state, and the buckle part 210 also has a shoulder part buckle ( 221) and the wrap buckle 222 maintain a state coupled to each other.

Accordingly, as shown in FIG. 5 , the tongue part 110 may include a tongue coupling part capable of coupling the shoulder part tongue 111 and the wrap part tongue 112 to each other, and in the present invention, for such a tongue coupling part, As will be described later, a method including a magnetic part 410 for coupling the shoulder tongue 111 and the wrap tongue 112 to each other using magnetism and the shoulder tongue 111 and the wrap tongue 112 are respectively fastened A method including a pin or a latch 420 for fastening is proposed.

The tongue part 110 is a shoulder part tongue 111 and a wrap part tongue 112 at this tongue part 110 coupling part.

In the coupled state by the shoulder portion buckle 221 and the wrap portion buckle 222 are fastened to the buckle portion 210 in the mutually coupled state to support the dummy.

However, the tongue part 110 is fastened to the buckle part 210 and at the same time the shoulder part tongue 111 and the wrap part tongue 112 may be separated from each other, and as will be described later, the shoulder part buckle 221 and the wrap part during a collision, as will be described later. The buckle 222 is separated from each other, and as the shoulder belt to which the shoulder tongue 111 is fastened moves forward according to the forward movement due to the inertia of the dummy, the shoulder buckle 221 fastened thereto is also a seat fastening part ( 230) will be rotated forward around the axis.

That is, the tongue part 110, specifically the shoulder part tongue 111, is separated from the wrap part tongue 112 in advance before a front collision occurs in the vehicle, and when a front collision occurs, it is a dummy separately from the wrap part tongue 112. is spaced forward by the, and according to the movement of the shoulder tongue 111, the shoulder buckle 221 is moved a predetermined distance forward.

The shoulder belt 120 moves forward by the moving distance of the shoulder buckle 221 to hold the chest of the dummy, and at this time, the shoulder belt serves to relieve the load applied to the chest of the dummy by the moving distance. will do

In the present invention, a magnetic part 410 for coupling the shoulder part tongue 111 and the wrap part tongue 112 by an attractive force acting on the surfaces in contact with each other may be provided. In this case, as will be described later, a separate guide member for separation is not required.

In addition, in the present invention, as shown in FIG. 5 , a tongue fastening pin 430 that is elastically supported in a state in which the shoulder part tongue 111 and the wrap part tongue 112 are penetrated by the elastic body 431 may be provided. . In this case, it is preferable to further include a pin release guide 433 for releasing it. When the tongue part 110 is coupled with the buckle part 210 , the pin release guide 433 is pressed by the buckle part 210 to release the tongue fastening pin 430 , thereby releasing the shoulder part tongue 111 and the wrap part tongue 112 . ) can be separated.

In addition, the present invention may further include a latch 420 capable of coupling the shoulder tongue 111 and the wrap tongue 112 to each other, and a latch 420 release guide for releasing the latch 420 .

As shown in FIG. 3, the buckle part 210 in the present invention is not only fastened with the tongue part 110, but also has a shoulder part buckle 221 and a wrap part buckle ( 222) will maintain a mutually coupled state.

Thereafter, when an impact is sensed in the vehicle, the two are separated from each other and rotated forward by the shoulder tongue 111 in the separated state.

In the present invention, as shown in FIGS. 6 to 8 , the strap part may further include a coupling member 510 for coupling or separating the shoulder part buckle 221 and the wrap part buckle 222 from each other. At this time, the coupling member 510 is preferably provided to pass through the shoulder buckle 221 strap and the wrap buckle 222 strap, and specifically includes, according to the operator's choice among shear screws, wedges, or rivets. can be

In a state in which the buckle part 210 is coupled by the shear screw, etc., when an impact is applied to the vehicle, the shear screw, etc. is cut so that the shoulder buckle 221 strap and the wrap buckle 222 strap are separated from each other, and as a result, the buckle The parts 210 may be separated from each other.

In one embodiment of the present invention, in order to cut a shear screw or the like when an impact occurs on a vehicle, a gas generator may be further included in the strap part. When an impact is sensed, an airbag control unit (ACU), that is, an airbag control unit, sends an ignition signal to the gas generator at the same time as the airbag is deployed, and a high-pressure gas is generated from the gas generator by this signal. At this time, in order to apply a shear force to the shear screw by the pressure of the gas, it is preferable that the strap part is composed of a cylinder.

In another embodiment of the present invention, instead of having a gas generator in the strap part, it is fastened to the lower end of the strap part and further includes a pre-tensioner 300 for reducing the load applied to the shoulder belt 120 when an impact occurs to the vehicle. can be configured. When an ignition signal is transmitted by the ACU due to an impact on the vehicle, high-pressure gas is generated by the explosion of the gas generator, and as the piston 310 inside the cylinder advances and the strap is drawn in or out, a shear force is applied to the shear screw, etc. it will work However, in order to generate such a shear force, the pre-tensioner 300 is preferably fastened to any one of the shoulder buckle 221 strap and the wrap buckle 222 strap, and the shoulder portion by the operation of the pre-tensioner 300 It is preferable that only one of the buckle 221 strap and the wrap buckle 222 strap is drawn in or drawn out.

The present invention proposes a seat belt control method to which such a split buckle structure is applied. That is, in an embodiment of the present invention, as described above, the occurrence of a front collision is detected by a collision sensor provided in an airbag, etc., and when an impact is detected, the ACU sends a gas generator ignition signal provided in the buckle strap part. do. By this signal, the coupling member 510 such as a shear screw may be cut by the high-pressure gas generated from the gas generator. By cutting the coupling member 510, the shoulder buckle 221 and the wrap buckle 222 are separated from each other. At this time, when the dummy moves forward due to inertia due to the front collision, the shoulder buckle 221 rotates forward with the seat fastening part 230 as the center while the wrap buckle 222 remains fixed. will do This rotation creates a separation distance from the fixed wrap buckle 222, and by this distance, the shoulder belt 120 supporting the chest of the dummy moves forward, thereby reducing the load transferred to the chest. .

In addition, in another embodiment of the present invention, instead of having a gas generator in the buckle strap part, a pre-tensioner 300 fastened to either side of the shoulder buckle 221 strap or the wrap buckle 222 strap is provided. , upon collision, the ACU ignites the gas generator provided in the pre-tensioner 300 . As either one of the buckle straps to which the pre-tensioner 300 is fastened is drawn in or drawn out, a shear force is applied to the shear screw, etc., and the shear screw is cut, so that the buckle part 210 can be separated from each other. Similarly, when the buckle parts 210 are separated from each other, the wrap buckle 222 is fixed in the event of a collision, but the shoulder buckle 221 rotates forward with the seat fastening part 230 as the center. This rotation creates a separation distance from the fixed wrap buckle 222, and by this distance, the shoulder belt 120 supporting the chest of the dummy moves forward, thereby reducing the load transferred to the chest. .

As a result, as shown in FIG. 9 , it can be confirmed that the chest displacement sensed by the upper right sensor is reduced.

The above-described embodiment is only a preferred embodiment that allows those of ordinary skill in the art (hereinafter referred to as 'person of ordinary skill in the art') to easily practice the present invention, and the above-described embodiment and the accompanying drawings Since it is not limited to, the scope of the present invention is not limited thereto. Therefore, it will be apparent to those skilled in the art that various substitutions, modifications and changes are possible within the scope of the present invention, and it is apparent that parts easily changeable by those skilled in the art are also included in the scope of the present invention. .

110: tongue
111: shoulder tongue
112: rap part tongue
120: shoulder belt
130: upper anchor
140: retractor
150: lower anchor
160: lap belt
210: buckle part
221: shoulder buckle
222: wrap buckle
230: seat fastening part
300: pre-tensioner
310: piston
320: cylinder
330: gas generator
400: tongue coupling portion
410: magnetic unit
420: latch
422: Latch Release Guide
430: tongue fastening pin
431: elastic body
432: fastening pin
433: Unpin guide
510: coupling member
520: gas generator

Claims (14)

a tongue comprising a shoulder tongue connected to the shoulder belt and a wrap tongue connected to the wrap belt;
Includes; a buckle portion consisting of a shoulder portion buckle and a wrap portion buckle fastened to the shoulder portion tongue and the wrap portion tongue, respectively;
The tongue part includes a tongue coupling part to enable mutual coupling or separation of the shoulder part tongue and the wrap part tongue,
The tongue coupling portion includes a tongue locking pin capable of separating the shoulder portion tongue and the wrap portion tongue from each other as the tongue portion is fastened to the buckle portion,
Split buckle structure, characterized in that when the vehicle is impacted, each buckle is separated from each other and the shoulder buckle is rotated toward the front so that the shoulder belt is separated from the driver by a certain distance. The method of claim 1,
The split buckle structure further comprising a strap portion comprising a shoulder buckle strap and a wrap buckle strap for fastening the shoulder buckle and the wrap buckle to one side of the seat, respectively. 3. The method of claim 2,
The strap part split buckle structure, characterized in that it further comprises a coupling member for coupling or separating the shoulder part buckle and the wrap part buckle from each other. 4. The method of claim 3,
The coupling member is a split buckle structure, characterized in that provided to mutually penetrate the shoulder buckle strap and the wrap buckle strap. 5. The method of claim 4,
The strap part split buckle structure further comprising a gas generator for separating the shoulder part buckle and the wrap part buckle by cutting the coupling member when an impact occurs on the vehicle. 5. The method of claim 4,
The split buckle structure further comprising a pre-tensioner fastened to the lower end of the strap portion to reduce a load applied to the shoulder belt when an impact occurs on the vehicle. 7. The method of claim 6,
The pre-tensioner is a split buckle structure, characterized in that fastened to any one of the shoulder buckle strap and the wrap buckle strap. 8. The method of claim 7,
Split buckle structure, characterized in that the coupling member is cut by withdrawing any one of the shoulder buckle strap and the wrap buckle strap by the pretensioner when an impact occurs on the vehicle. delete The method of claim 1,
and the tongue coupling part includes a magnetic part capable of coupling or separating the shoulder part tongue and the wrap part tongue using magnetism. delete The method of claim 1,
The split buckle structure of the tongue coupling part further comprising a pin release guide for releasing the tongue fastening pin when the tongue part is fastened to the buckle part. delete delete

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