KR101598199B1 - A Airbag System to Distribute the Pressure of The Air Bag Deployment - Google Patents

Abstract

Airbag deployment A pressure-dispersed airbag system is disclosed. An airbag deployment type pressure-distribution type airbag system according to the present invention comprises: an airbag module for deploying an airbag in the event of a vehicle collision; A crash pad formed along an edge of the lid part and provided with an incision line ruptured by the deployment of the airbag and a turning part provided so as to allow the lid part to pivot upward in accordance with the deployment of the airbag, ; And pressure distributing means formed in the incision line to distribute the deployment pressure of the airbag so as to control the opening of the crash pad.
According to the present invention, by providing the pressure distribution means implemented in the form of protrusions or deformation lines in the incision line of the crash pad, it is possible to distribute the deployment pressure of the airbag in the event of a situation such as a vehicle collision, And it is possible to provide an airbag deployment pressure distribution type airbag system capable of preventing the breakage of the windshield on the front of the vehicle and thus assuring the safety of the passenger.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a pressure-

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an airbag deployment type pressure-distribution type airbag system, and more particularly, to an airbag deployment type airbag system that distributes deployment pressure of an airbag when a vehicle collision occurs, BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a pressure-

BACKGROUND ART [0002] Generally, an automobile is provided with an airbag device as a means for protecting a driver and an occupant. Such an airbag device functions as a typical occupant protection device when a vehicle collides with a seatbelt. The increase in the demand of the consumer is promoting various active research and development of the airbag.

Accordingly, Korean Patent Registration No. 10-1260853 filed previously by the applicant of the present invention according to the present invention relates to an airbag module 100. As shown in Fig. 1, the airbag module 100 includes an inflator and a cushion An airbag housing 110 which is accommodated in the chute 120 and is opened to open the front of the airbag housing 110; a chute 120 which is coupled to the upper side of the airbag housing 110; And an airbag door 130 capable of relatively rotating with respect to the chute 120 so as to open the front surface of the airbag housing 110 after performing relative linear motion with respect to the chute 120 according to the development of the cushion when the impact is applied , The breakage of the hinge portion is prevented and the tear line can be easily separated when the cushion is deployed.

The airbag module 100 according to the related art is separated from the chute 120 at an edge of the door body 132 according to the shape of the cutout portion 138 when the cushion (airbag) is deployed, There is a problem that the crash pad on the outside or even the outside crashes on the front windshield of the vehicle, thereby damaging the windshield.

This is because the edge of the door body 132 is simultaneously detached from the chute 120 while distributing the deployment pressure of the airbag (cushion) to direct the deployment direction of the cushion (airbag) to the passenger side It is desired to research and develop an air bag system that allows the tear line of the crash pad to be cut without being twisted.

Korean Patent No. 10-1260853 (Notification date: 2013.05.06)

Disclosure of the Invention An object of the present invention is to provide an airbag deployment pressure distribution system capable of distributing deployment pressure of an airbag when a situation such as a vehicle collision occurs to guide the projecting direction of the airbag toward a passenger, Type air bag system.

The object is achieved by an airbag module for deploying an airbag in the event of a vehicle collision; A crash pad formed along an edge of the lid part and provided with an incision line ruptured by the deployment of the airbag and a turning part provided so as to allow the lid part to pivot upward in accordance with the deployment of the airbag, ; And a pressure distributing means formed in the incision line to distribute the deployment pressure of the airbag so as to control the opening of the crash pad.

The pressure distributing means may be formed as a protruding portion protruding outwardly from the rotating portion and extending the length of the incision line per unit area.

The protrusions may be formed as a plurality of left-right symmetrical shapes.

The pressure distributing means may be a deformation incision line formed by forming an incision line at a different depth in order to differentially respond to the pressure distribution of the deployed airbag.

The modified incision line may be formed by a groove having a depth proportional to a distance from the pressure center of the deployed airbag.

The airbag module includes: an airbag housing configured to receive the airbag and open the upper surface; A chute coupled to an upper side of the airbag housing and having a deployment hole formed at one side of the airbag so as to be protruded outward; A door sidewall disposed on one side of the door body for guiding the door body so as to relatively linearly move relative to the chute; An airbag door including a hinge portion for connecting the door body and allowing the door body to make a relative rotational movement with respect to the chute; And a rupturing part which is connected to the door body and the chute so as to be ruptured after dispersing the pressure due to the deployment of the airbag.

The rupture part is composed of a joint part for maintenance and an incision part, and the joint part can be connected and fixed to the chute body at a joint strength in inverse proportion to the distance from the pressure center of the deployed airbag.

When the joint members are formed symmetrically with each other at the same distance as the pressure center of the deployed airbag, the door body and the chute can be connected and fixed with the same joint strength.

The rupture portion may be formed by a groove having a depth proportional to a distance from the pressure center of the deployed airbag in order to differentially respond to the pressure distribution of the deployed airbag, respectively, between the door body and the chute .

According to the present invention, by providing the pressure distribution means implemented in the form of protrusions or deformation lines in the incision line of the crash pad, it is possible to distribute the deployment pressure of the airbag in the event of a situation such as a vehicle collision, And it is possible to provide an airbag deployment pressure distribution type airbag system capable of preventing the breakage of the windshield on the front of the vehicle and thus assuring the safety of the passenger.

1 is a schematic perspective view of an air bag deployment pressure distribution type air bag system according to the present invention.
FIG. 2A is a front view showing a projection as a pressure distribution means according to the present invention. FIG.
FIG. 2B is a cross-sectional view taken along line A of FIG. 2A.
2C is a cross-sectional view taken along line B of FIG. 2A.
3A is a front view showing a modified cutting line as a pressure distribution means according to the present invention.
3B is a sectional view taken along the cutting line A of FIG. 3A.
3C is a cross-sectional view taken along line B of FIG. 3A.
4 is a schematic exploded perspective view of an air bag deployment pressure distribution type air bag system according to the present invention.
FIG. 5A is a front view showing an incision hole and a joint member according to an embodiment of the present invention. FIG.
5B is a front view showing a modified example of the incision hole and the joint member, which are the rupture part according to the present invention.
6A is a front view showing an incision groove which is a rupture portion according to the present invention.
6B is a cross-sectional view taken along line A of Fig. 6A.
6C is a sectional view taken along the cutting line B of FIG. 6A.
7A to 7C are cross-sectional views illustrating an operating state of an air bag deployment type pressure-distribution type air bag system according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, the well-known functions or constructions are not described in order to simplify the gist of the present invention.

FIG. 1 is a schematic perspective view of an air bag deployment pressure-distribution type air bag system according to the present invention, and FIG. 2 (a) is a front view showing a protrusion as a pressure dispersion means according to the present invention.

FIG. 2B is a sectional view taken along the cutting line A of FIG. 2A, and FIG. 2C is a sectional view taken along the cutting line B of FIG. 2A. 3A is a front view showing a modified cutting line as a pressure dispersion means according to the present invention, FIG. 3B is a sectional view taken along a cutting line A of FIG. 3A, and FIG. 3C is a sectional view taken along a cutting line B of FIG.

1 to 3, an airbag deployment type pressure-distribution type airbag system 1 according to the present invention may include an airbag module 10, a crash pad 20 and a pressure dispersion means 30 .

The crash pad 20 is a closure member having a shock absorbing function provided inside the vehicle to prevent damage to a driver or a vehicle occupant in the event of a vehicle collision. The crash pad 20 is provided at an upper portion of the airbag module 10, And the other side is cut in accordance with the above.

The crash pad 20 may include a lid 22, an incision line 24, and a swivel 26. First, the lid 22 extends from the airbag module 10 at the lower end to the airbag (not shown) 5 is opened to allow the airbag 5 to be exposed to the outside of the crash pad 20 and is provided on the upper surface of the door main body 310 of the airbag module 10 to be described later, 310 are opened in accordance with the deployment of the airbag 5, the lid portion 22 located at the upper portion is also opened.

The incision line 24 fixes the lid portion 22 on the same plane as the crash pad 20 when the airbag 5 is not normally deployed and the lid portion 22 of the airbag 5 A component ruptured by pressure, and may be formed as a groove, such as a scoring line, along the edge of the lid 22.

The incision line 24 is formed on at least one of the front surface of the crash pad 20 facing the occupant side and the back surface of the crash pad 20 facing the airbag module 10 . It is preferable that the incision line 24 be formed on the back surface of the crash pad 20 and that the incision line 24 is formed on both the back surface and the front surface in order to facilitate the breakage of the incision line 24. [ ) May be formed.

The incision line 24 may be formed simultaneously with the injection molding of the crash pad 20 and the lid portion 22 by injection molding and may be formed through injection molding of only the crash pad 20 and laser- It is possible. The depth and width of the groove constituting the incision line 24 are related to the bonding strength (shear force) between the crash pad 20 and the lid portion 22. The depth of the groove is weaker as the depth of the groove is decreased. It is possible to determine the capacity of the airbag 5 and the deployment pressure of the airbag 5 in consideration.

The pivot portion 26 is a component provided so that the lid portion 22 can be pivoted upward in accordance with the deployment of the airbag 5 and is connected to one end portion of the lid portion 22. [ The swinging unit 26 is configured such that the incision line 24 is ruptured along with the deployment of the airbag 5 and then the other end of the lid unit 22 is pivoted upward so that the airbag 5 is opened to the outside of the crash pad 20 As shown in the enlarged view of FIG. 1, and the other end of the lid part 22 can be easily rotated upward by forming the lower surface of the recess in a concave shape.

The pressure distributing means 30 can be formed in the above-mentioned incision line 24, with the technical feature of the present invention being a component that disperses the deployment pressure of the airbag 5 to control the opening of the crash pad 20 . The pressure distributing means 30 according to the present invention may be embodied specifically as the protrusion 32 and the modified cutout line 34, and may be implemented in various other ways as well.

The protrusion 32, which is the pressure dispersion means 30 according to the embodiment of the present invention, is a component provided to extend the length of the incision line 24 per unit area as shown in FIGS. 2A to 2C, And protruding outward at the incision line 24 farther from the eccentric portion 26. [

If the incision line 24 is formed as a groove having a constant depth along the lid portion 22 and there is no protrusion 32, the incision line 24 is formed in the lid portion 22, which is the pressure center of the deployed air bag 5, The center of the incision line 24b in the vertical direction is torn in the up and down direction, and it meets with the rupture in the transverse direction, and finally, The lid portion 22 is opened while the vicinity of the right and left vertexes of the incision line 24 (see FIG.

However, if the protrusion 32 is formed near the left and right vertexes of the incision line 24, the length of the incision line 24 is extended to increase the coupling strength (shear force) between the lid portion 22 of the protruded region and the crash pad 20, Is increased. This serves to disperse the unfolding pressure of the airbag 5, which is expanded and increased in the four directions from the center of the cover 22, which is the pressure center of the unfolded airbag 5, to the entire lower surface of the cover 22.

The deployment pressure of the airbag 5 thus dispersed is accumulated on the side of the lid part 22 on the side where the lid 22 opens (the occupant side) and tears the incision line 24 of the projecting part 32, And can be guided to the side (the occupant side) where the lid portion 22 is opened.

This is because, when there is no such a constitution as the protruding portion 32 which is the pressure distributing means 30, as the dispersion and the accumulation of the deployment pressure of the airbag 5 are not made, the airbag 5 is not in contact with the passenger- It is distinguished from that which would cause breakage of the windshield of the front windshield of the vehicle by causing the lid portion 22 to be excessively pivoted.

The projections 32 shown in Figs. 2A to 2C are used for the purpose of dispersing the airbag 5 deployment pressure and the scale thereof and for guiding the deployment direction of the airbag 5 to the side (the occupant side) on which the lid part 22 is opened The shape, position, and number of protrusions 32 can be deformed at any appropriate level.

 For example, a projecting portion 32 may be further formed at a corresponding position to reinforce the central upper end tearing first with reference to the lid portion 22 of Fig. 2A, (To increase the bonding strength between the lid portion 22 and the crash pad 20) of the incision line 24 in the region where the incision is made.

The modified cutout line 34, which is the pressure distribution means 30 according to the embodiment of the present invention, may be formed in the shape of a groove in order to differentially correspond to the pressure distribution of the deployed airbag 5 as shown in Figs. 3A to 3C. Can be implemented with a depth-different incision line 24 (modified incision line 34).

More specifically, in the case of the rectangular cover 22, the depth of the groove is reduced toward the far side from the center of the lid portion 22 which is the pressure center of the airbag 5 (34a → 34b → 34c) Respectively.

This is because the largest deployment pressure is applied to the deformation incision line 34a closest to the center of the cover portion 22 which is the pressure center of the airbag 5 and the lowest deployment pressure is applied to the most deformation incision line 34c And a moderate development pressure is applied to the modified cutout line 34b at a medium distance.

That is, the depth of the grooves of the modified cutout line 34 is made shallow (closer to the pressure center of the airbag 5 (34c? 34b? 34a) (the lid portion 22 by the modified cutout line 34 and the crash pad 20), the modified cutting lines 34a, 34b, 34c are not cut until the differentiated developing pressure of the airbag 5 corresponding to the bonding strength of each depth is applied So that the deployment pressure from the pressure center of the airbag 5 is dispersed and the deployment pressure is accumulated. Each of the modified incision lines 34a, 34b, and 34c may then sequentially correspond to the deployment pressure of the airbag 5, but may be incised at substantially the same time without deviating to either side.

As a result, as the differential developing pressure of the airbag 5, which is expanded and increased in all directions from the pressure center of the airbag 5, is distributed over the entire lower surface of the lid portion 22, And can be naturally induced to the side (occupant side) on which the lid part 22 to be accumulated is opened.

This is because, in the case of a conventional airbag module having no configuration such as the strain dissipation line 34 as the pressure distributing means 30, the airbag 5 is deployed vertically above the pressure center, not on the passenger side, Which is caused by excessive rotation, thereby causing breakage of the front windshield of the vehicle.

The depth of the groove of the deformed incision line 34 corresponding to the coupling strength between the lid portion 22 and the crash pad 20 is equal to the depth of the pressure center of the airbag 5 To the deformation cutting line (34).

The depth of the groove according to the position of the modified cutout line 34 can be variously changed according to the material of the modified cutout line 34, the pressure of the airbag 5, the shape of the lid 22, and the like.

The deployment pressure of the airbag 5 is distributed and accumulated on the entire lower surface of the lid portion 22 by the pressure distributing means 30 described above so that deployment of the airbag 5 to the passenger side can be stably performed, The breakage of the front windshield of the vehicle by the windshield 30 can be prevented.

FIG. 4 is a schematic exploded perspective view of an airbag deployment type pressure-dispersing type airbag system according to the present invention, FIG. 5a is a front view showing one embodiment of a cutout hole and a coupling member, FIG. 6 is a front view showing a modified example of the incision hole and the coupling member according to the invention. FIG. FIG. 6A is a front view showing a cutout groove of a rupture portion according to the present invention, FIG. 6B is a sectional view taken along a cutting line A of FIG. 6A, and FIG. 6C is a sectional view taken along a cutting line B of FIG. 7A to 7C are cross-sectional views showing an operating state of the airbag deployment type pressure-distribution type airbag system according to the present invention.

The airbag module 10 according to the present invention is configured such that the airbag 5 is held by an inflator (gas generator, not shown) connected to the collision detection sensor while the airbag 5 is housed therein, Inflatable device, which may include an approximate airbag housing 100, a chute 200, an airbag door 300, and a rupturable portion 400.

First, the airbag housing 100 is a component for receiving the airbag 5 deployed therein in the event of a vehicle collision. The airbag housing 100 is a component for accommodating the airbag 5, which is opened when the airbag 5 is deployed, And may include a fastening bracket 110, a first fastening ring 120, and a second fastening ring 130.

 The fastening bracket 110 is a component for fixing the airbag housing 100 and a chute 200 to be described later. The fastening bracket 110 is provided on both sides of the airbag housing 100 and fastened to the fastening part 210 of the chute 200. [ do.

The first fastening ring 120 is a component to be inserted into a guide hole 322 of a door sidewall 320 to be described later and controls a linear movement of the door sidewall 320. A pair of fastening brackets 110 At least one or more protrusions may be formed on one side other than the formed region. It is preferable that the first fastening rings 120 are formed to be spaced apart from each other in the lateral direction along the side surface of the airbag housing 100 for stable binding with the guide holes 322, So that it can be fastened in an inclined manner.

The second fastening ring 130 is a component to be inserted into the fastening hole 222 of the chute side wall 220 to be described later and is formed at least one protrusion at a position facing the first fastening ring 120 . It is preferable that the second fastening rings 130 are formed to be spaced apart from each other in the lateral direction along the side surface of the airbag housing 100 in the same manner as the first fastening rings 120 for stable fastening with the fastening holes 222 And may be formed so as to be inclined so as to be easily fastened to the latching hole 222. [

On the other hand, the airbag housing 100 may be provided with a sloped surface on one side for guiding the protruding direction of the deployed airbag 5. Specifically, one surface of the bowl-shaped airbag housing 100 is formed with an inclined surface so as to be distinguished from the other side surface so that the deployment of the airbag 5 can be appropriately guided in the side direction of the inclined surface so that the airbag 5 can be projected in a desired direction will be.

These inclined surfaces can be formed more than two to guide a more appropriate projecting direction, and various modifications can be made such as curving the inclined surfaces for the same purpose.

The chute 200 is a component that is coupled to the upper portion of the airbag housing 100 and specifically includes a chute body 210, a chute side wall 220, and a fastening portion 230.

The chute body 210 is provided at the center of the airbag housing 100 so that the airbag 5 deployed at the time of a vehicle collision can protrude outward through the chute body 210 And is formed in the shape of a rim of the plate as a whole. At this time, the shape may be formed of a plate material having various shapes such as a circle, an ellipse, a square, a rectangle, and a hexagon, and the shape of the expansion hole 212 provided at the center may be variously modified. However, in the embodiment of the present invention, the chute body 210 is formed of a rectangular plate, and the development hole 212 is also rectangular.

The chute side wall 220 is a component protruding downward from the lower surface of the chute body 100. The chute side wall 220 can be formed in a shape and size such that the airbag housing 100 can be inserted into the chute side wall 220 The chute side wall 220 may be inserted into the airbag housing 100. [ However, at this time, it is preferable that the second tightening ring 130 is formed on the chute side wall 220 and the latching hole 222 is formed at the corresponding position of the airbag housing 100.

The second tightening ring 130 and the engaging hole 222 are formed on the chute side wall 220 in a position corresponding to the second tightening ring 130. The securing hole 130 and the engaging hole 222 are formed on the chute side wall 220, As long as the housing 100 is firmly fastened, it is of course possible to be modified in various forms and ways for the purpose of the present invention.

The fastening portion 230 is a component that is engaged with and fixed to the fastening bracket 110 of the airbag housing 100. Various fastening methods can also be applied.

If the coupling between the chute 200 and the airbag housing 100 can be sufficiently supported by the coupling part 230 in the operation of the inflator for deploying the airbag 5, (130) may be omitted.

The airbag door 300 is a component that rotates relative to the chute 200 after being separated from the chute 200 through cutting of the joint member 410 by the pressure of the airbag 5 deployed upon collision.

Although the airbag door 300 can achieve the object of the present invention only by the configuration including the door main body 310 and the hinge portion 330, the airbag door 300 has a further improved effect through the configuration including the door side wall 320 Can be exercised.

The airbag door 300 is separated from the chute 200 by the pressure of the deployed airbag 5 and at the same time is separated from the chute 200 by a predetermined interval (Relative to the length of the guide hole 322 to be described later) relative to the chute 200 after performing relative linear motion (upward in the drawing).

Specifically, the door body 310 is a plate-shaped component that is provided in a space in which the deployment hole 212 is located and serves as a lid. The upper surface of the door body 310 is provided with a crash pad of an automobile, To perform a role.

The door body 310 may be formed in various shapes according to the shape of the deployment hole 212. The door body 310 may have various shapes such as a shape, The airbag 5 is separated from the chute 200 by the pressure acting in accordance with the deployment of the airbag 5. When the entire airbag door 300 is detached from the chute 200, the airbag door 300 is movable upward by door sidewalls 320 below.

The door sidewall 320 is a component disposed on one side of the door body 310 to guide the door body 310 relative to the chute 200 so that the door body 310 can move relative to the chute 200. The first sidewall 320, So that the door body 310 and the door body 310 are formed as a whole.

A guide hole 322 is formed in the door sidewall 320 at a position and a width corresponding to the first connection ring 120 so that the first connection ring 120 is inserted and connected. Here, the guide hole 322 is formed so as to extend downward from the binding position with the first fastening hook 120 so that the door side wall 320 can linearly move upward by a predetermined length. Thereby, the airbag door 300 is guided to perform the relative linear motion with respect to the chute 200, and is hooked by the first fastening hook 120 and does not project beyond the set upper and lower lengths of the guide hole 322.

The upward movement length of the airbag door 300 may be varied in various ways by adjusting the vertical length of the guide hole 322. The upper and lower lengths of the guide hole 322 are preferably formed to such a degree that the hinge portion 330 provided on the airbag door 300 can be completely exposed from the surface of the chute 200.

The hinge portion 330 is a flexible component that interconnects the door body 310 and the door side wall 320 and allows the door body 310 to rotate relative to the chute 200. The hinge portion 330 is a flexible component, So that the door body 310 can be rotated.

The hinge portion 330 may be of any shape as long as it is made of a flexible member and can freely guide the rotation of the door body 310. However, it is preferable to bend the side surface of the hinge portion 330 in the form of a sinusoidal wave in order to prevent breakage of the hinge portion 330 from impact of the deployed air bag 5 and to ensure smooth rotation.

The airbag door 300 described above has a first operation in which the door body 310 is relatively linearly moved upward with respect to the chute 200 so that the hinge portion 330 is completely protruded outward from the chute 200, So that the door main body 310 performs a second operation in which the door main body 310 rapidly rotates. Through the double action of this airbag door 300, the airbag 5 can be smoothly deployed in the desired deployment direction.

The rupturing part 400 is connected and fixed to the door body 310 and the chute 200. The rupturing part 400 ruptures after dispersing the deployment pressure corresponding to the pressure distribution of the deployed airbag 5 when an impact is applied to the vehicle, The door body 310 is separated from the chute 200 at almost the same time, and is a technical feature of the present invention. As the unfolding pressure of the airbag 5 is uniformly dispersed throughout the lower surface of the door body 310 through the rupturing part 400, the airbag door 300 can perform a constant relative linear motion.

The rupturing part 400 may be embodied by the joining part 410 and the incising part 412 and may be realized by the incision part 420.

First, the operation of the joint member 410 and the incision hole 412 will be described in detail as follows. The joint member 410 and the cutout hole 412 shown in Figs. 5A and 5B are provided between the door body 310 and the chute 200 and have a plurality 410a, 410b, and 410c, and a cutting hole 412, respectively.

The joint member 410 is provided in a boundary space between the door main body 310 and the chute 200 spaced apart from each other by a predetermined distance so as to connect and fix both sides of the door body 310. The spaced apart spaces form a cutting hole 412, The shape of the first electrode 410 may be a plate, a cylindrical shape, a polygonal columnar shape, or a tapered shape of the above-described shape.

At this time, the joint member 410 can be integrally manufactured by simultaneously molding the chute 200 and the airbag door 300, and the chute 200 and the airbag door 300 can be integrally manufactured, Or may be formed through cutting processing.

When the pressure center of the airbag 5 is the center of the door main body 310, the left and right sides of the joint member 410 are symmetric with respect to the center of the door main body 310 Respectively.

This is to prevent a phenomenon in which the pressure of the deployed air bag 5 is directed to one side and the corresponding portion is first cut off.

5A, the door main body 310, which is formed in a rectangular shape, includes a joint member (not shown) which is located farther from the center of the door main body 310, which is the pressure center of the airbag 5 410 (410a, 410b, 410c), the thickness of the coupling member 410 is reduced.

This is because the largest deployment pressure is applied to the joint member 410a closest to the center of the door body 310 which is the pressure center of the airbag 5 and the lowest deployment pressure is applied to the joint member 410c located farthest , And a medium expansion pressure is applied to the joint member 410b at a middle distance.

The joint strength of the joint body 410 between the door body 310 and the chute body 210 through the joint member 410 becomes larger as the distance from the pressure center of the airbag 5 The connecting members 410a, 410b and 410c are not disconnected until the differential developing pressure of the airbag 5 corresponding to the coupling strength of each width is applied, and the pressure of the airbag 5 The expansion pressure from the center is dispersed and the expansion pressure is accumulated. Then, each of the plurality of coupling members 410a, 410b, and 410c sequentially corresponds to the deployment pressure of the airbag 5, and can be cut at almost the same time without inclinations to either side.

As a result, as the differential developing pressure of the airbag 5, which is expanded and increased in all directions from the pressure center of the airbag 5, is distributed throughout the lower surface of the door body 310, a certain relative linear motion of the airbag door 300 is induced And the deployment direction of the airbag 5 can be naturally induced to the side (the side facing the hinge portion 330 or the occupant side) where the door main body 310 where the dispersed pressure is accumulated is opened.

This is because in the case of the conventional airbag module having no structure similar to the rupturing portion 400, in a state in which the developing pressure developed in all directions at the pressure center of the airbag 5 is not sufficiently accumulated to the side where the door body 310 is opened As the door body 310 and the crash pad 30 are opened, the airbag 5 is deployed vertically above the pressure center rather than the passenger side, which causes an excessive rotation of the crash pad 30, It is distinguished from the one that caused the damage.

This rupturing portion 400 can distribute the unfolding pressure of the airbag 5 in a duplex manner together with the pressure distributing means 30 described above so that the deployment of the airbag 5 to the occupant side can be made more stable and the crash pad 30 The breakage of the front windshield of the vehicle by the breakage of the windshield can be prevented.

The width of the joint member 410 corresponding to the joint strength between the door main body 310 and the chute 200 is set to be greater than the width of the joint member 410 at the pressure center of the airbag 5, And the inverse relationship with the separation distance.

The width depending on the position of the coupling member 410 can be variously changed according to the material, shape and number of the coupling member 410, the size of the pressure of the airbag 5, the shape of the door body 310, 10), and the installation space, and the like.

 The purpose of simultaneous cutting and spreading pressure dispersion of the joint member 410 by the joint member 410 and the cutout hole 412 as described above can be achieved by using the joint member 410 having the same width as the pressure center of the airbag 5 It is needless to say that the present invention can also be implemented by installing the system in close proximity, and installing it in a remote place at a small distance.

The joint member 410 shown in Fig. 5B, which is a modification of the joint member 410 according to the present invention, is formed symmetrically at the same distance as the pressure center of the deployed airbag 5, The purpose of the coupling member 410 according to the embodiment described above can be achieved.

This is because the deployment pressure of the airbag 5, which is expanded from the center of the door body 310, which is the pressure center of the airbag 5, to the four sides, acts and disperses in the same size in each of the symmetrically formed joint members 410 of the same thickness, (410) are simultaneously cut without bias.

6A to 6C, the cutout groove 420, which is another type of the rupturable portion 400 according to the present invention, is pressed against the chute body 210 by the pressure of the airbag 5 deployed at the time of a vehicle collision, A scoring line is formed along an area where the chute body 210 and the door body 310 are in contact with each other so that the door body 310 can be easily separated from the chute body 210. [

At this time, the cutting groove 420 can be integrally manufactured while injection molding the chute 200 and the airbag door 300. In addition, the chute 200 and the airbag door 300 are integrally formed, Cutting grooves 420 may be formed through processing. The cutout groove 420 is formed at least on the front surface (the surface facing the occupant side) of the door body 310 and the rear surface (the surface facing the airbag housing 100 in which the airbag 5 is housed) Can be formed on either side.

The cutout grooves 420 are formed in a manner such that the opening pressure of the airbag 5 deployed at the time of vehicle collision differs correspondingly to the pressure distribution of the airbag 5 to vary the depth of the door body 310 so that the door body 310 can be simultaneously detached from the chute body 210 Can be implemented in the form of a groove.

(Shear force) between the door body 310 and the chute 200 in a region close to the pressure center of the airbag 5 with the same concept as that of the deformation incision line 34 as the pressure distribution means 30 described above. There is a technical commonality with the plurality of coupling members 410a, 410b, and 410c formed by varying the widths described above.

6A to 6C, the cutout groove 420 will be described in detail. In the case of the rectangular door body 310, the distance from the center of the door body 310, which is the pressure center of the airbag 5, The depth of the grooves 420a, 420b, and 420c is gradually increased.

This is because the greatest developing pressure is applied to the cutting groove 420a closest to the center of the door body 310 which is the pressure center of the airbag 5 and the lowest developing pressure is applied to the cutting groove 420c located farthest , And a middle development pressure is applied to the cutout groove 420b of a middle distance.

That is, the depth of the incision grooves 420a is shallow (the incidence of the connection between the door main body 310 and the chute body 210 by the incision grooves 420) as the distance from the pressure center of the airbag 5 (420c → 420b → 420a) The incision grooves 420a, 420b and 420c are not cut until the differentiated developing pressure of the airbag 5 corresponding to the coupling strength of each depth is applied and the airbag 5 ) And the expansion pressure is accumulated at the same time. Each of the cutout grooves 420a, 420b, and 420c corresponds to the deployment pressure of the airbag 5 sequentially, but can be cut at almost the same time without being deviated to either side.

As a result, as the differential developing pressure of the airbag 5, which is expanded and increased in all directions from the pressure center of the airbag 5, is distributed throughout the lower surface of the door body 310, a certain relative linear motion of the airbag door 300 is induced And the deployment direction of the airbag 5 can be naturally induced to the side (the side facing the hinge portion 330 or the occupant side) where the door main body 310 where the dispersed pressure is accumulated is opened.

This is because, in the case of the conventional airbag module having no constitution like the cutout groove 420 which is the rupturing portion 400 as described above, the airbag 5 is deployed vertically above the pressure center, not on the passenger side, 30 caused by excessive rotation of the front windshield of the vehicle, which would cause breakage.

This incision groove 420 distributes the unfolding pressure of the airbag 5 doubly together with the above-described pressure distributing means 30 so that deployment of the airbag 5 to the occupant side can be made more stable, and the crash pad 30 The breakage of the front windshield of the vehicle by the breakage of the windshield can be prevented.

The depth of the cutout groove 420 corresponding to the joint strength between the door body 310 and the chute 200 is greater than the depth of the cutout groove 420 at the pressure center of the airbag 5, ) And the distance between the two.

The depth of the cutout groove 420 may vary according to the material of the cutout groove 420, the size of the pressure of the airbag 5, the shape of the door body 310, The purpose of use and the space for installation.

The deployment pressure of the airbag 5 is uniformly dispersed throughout the entire lower surface of the door main body 310 by the rupturing unit 400 described above so that the door main body 310 can be easily detached from the chute main body 210 according to the deployment of the airbag 5. [ So that the upper surface of the airbag housing 100 can be exposed and the upper surface of the airbag housing 100 can be exposed to the outside of the chute body 210 relative to the chute body 210. [ It becomes possible to perform a rotational motion.

Hereinafter, the operation of the air bag deployment type air bag system according to the present invention will be described with reference to FIGS. 7A to 7C.

7A, the airbag module 10 of the present embodiment allows the airbag housing 100 to be coupled to the lower portion of the chute 200, which is formed by injection molding of the airbag door 300, As shown in FIG.

7B, gas is supplied from the inflator accommodated in the interior of the airbag housing 100 when the impact is applied to the airbag housing 100 over a predetermined range, so that the airbag 5 is opened It starts to develop upward.

When the airbag 5 is deployed, the door main body 310 and the lid portion 22 are dispersed and accumulated by the rupturing portion 400 and the pressure distributing means 30, and then the chute body 210 and the crash And simultaneously starts to relatively linearly move upward with respect to the chute body 210 for opening the expansion hole 212 while the four sides are simultaneously detached from the pad 20.

That is, the incision line 24 provided with the rupturable portion 400 and the pressure distribution means 30 by the airbag 5 deployed by the gas pressure of the inflator disperses and accumulates the deployment pressure of the airbag 5, The door main body 310 and the lid portion 22 are separated from the chute body 210 and the crash pad 20 and are guided by the first side wall 320 guided by the first tightening ring 120, And moves relative to the main body 210 upward.

The upward movement of the door main body 310 continues until the guide hole 322 of the door sidewall 320 meets the lower surface of the first engagement ring 120 of the airbag housing 100 by the vertical length of the guide hole 322 It proceeds.

That is, the door main body 310 relatively moves linearly with respect to the chute body 210 to open the expansion hole 212, and the hinge portion 330 is raised and protruded until complete exposure is made from the chute body 210 And then stopped by the first fastening ring 120.

7C, the door body 310 and the lid portion 22 are opened by the continuously deployed airbag 5 by the incision line 24 provided with the rupturing portion 400 and the pressure distributing means 30, And is opened by relative rotation with respect to the chute body 210 and the crash pad 20 through the hinge portion 330 and the turning portion 26. [

When the door body 310 and the lid portion 22 are opened in a state where dispersion and accumulation of the deployment pressure of the airbag 5 are performed, the airbag 5 is guided smoothly to the occupant side of the vehicle through the opened deployment hole 212, It is possible to securely protect the occupant from the impact when deployed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is obvious to those who have. Accordingly, such modifications or variations should not be individually understood from the technical spirit and viewpoint of the present invention, and modified embodiments should be included in the claims of the present invention.

1: Air bag deployment Pressure distribution type air bag system
5: air bag 10: air bag module
20: crash pad 22: cover part
24: incision line 26:
30: pressure distributing means 32:
34: Variation incision line
100: air bag housing 110: fastening bracket
120: first fastening ring 130: second fastening ring
200: Suit 210: Suit body
212: opening ball 220: chute side wall
222: latching hole 230: fastening part
300: air bag door 310: door main body
320: door sidewall 322: guide ball
330: hinge part 400: rupture part
410: joint member 412: incision ball
420: incision groove

Claims (9)

An airbag module for deploying the airbag in the event of a vehicle collision;
An incision line formed along an edge of the lid unit and ruptured by the deployment of the airbag; and a rotation unit provided on the lid unit in such a manner that the lid unit can be pivoted upward according to the deployment of the airbag, A crash pad comprising; And
And pressure distributing means formed in the incision line to distribute the deployment pressure of the airbag so as to control the opening of the crash pad,
Wherein the pressure distributing means comprises:
And a protruding portion protruding outwardly from the rotation portion and extending a length of the incision line per unit area. delete The method according to claim 1,
The projection
Wherein the airbag is formed in a plurality of symmetrical shapes. The method according to claim 1,
Wherein the pressure distributing means comprises:
And a deformation incision line in which the incision line is formed at different depths to correspond to different distances according to a pressure distribution of the deployed airbags. 5. The method of claim 4,
The modified cutting line includes:
Wherein the airbag is formed by a groove having a depth proportional to a distance from a center of pressure of the deployed airbag. The method according to claim 1,
The airbag module includes:
An airbag housing configured to receive the airbag and open the upper surface thereof;
A chute coupled to an upper side of the airbag housing and having a deployment hole formed at one side thereof so that the airbag is deployed and protruded outward;
A door sidewall disposed at one side of the door body for guiding the door body to relatively linearly move with respect to the chute; And a hinge portion interconnecting the door sidewall and allowing the door body to make a relative rotational movement with respect to the chute; And
And a rupture unit that connects the door body and the chute to each other and ruptures after the pressure is dispersed according to the development of the airbag. The method according to claim 6,
The rupturing portion
A plurality of joint members and a cutting hole,
Wherein the joint member connects and fixes the door main body and the chute at a coupling strength in inverse proportion to a spacing distance between the center of the airbag and a center of pressure of the deployed airbag. 8. The method of claim 7,
Wherein the joint member is formed symmetrically with the same distance as the pressure center of the deployed airbag, and the door body and the chute are connected and fixed with the same joint strength. The method according to claim 6,
The rupturing portion
And a cutting groove formed between the door body and the chute,
Wherein the airbag is formed by a groove having a depth proportional to a distance from the pressure center of the airbag deployed to differentially respond to a pressure distribution of the deployed airbag.

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