KR100493723B1 - A side air bag for automobile - Google Patents

Abstract

The present invention relates to a side airbag for a vehicle, and provides airbag modules (100, 200, 300) having a reinforcement pad, an inner cushion pad, a tubular tether, and a tier seam stacked in multiple layers, so that gas pressure is not easily eccentric. It is a very useful and effective invention to effectively protect the driver and the passenger sitting on the seat by deploying the side airbag cushion with the duration of the adjusted. In addition, the side air bag of the present invention has the effect that the amount of the cushion pad used is small, the sewing method is simple, and the folding operation is advantageous, thereby reducing the cost.

Description

Side air bag for vehicle {A SIDE AIR BAG FOR AUTOMOBILE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side air bag, and more particularly, to a side air bag for a vehicle, which is stably operated by adjusting a flow and time of gas.

In general, automotive airbags are safety systems to protect drivers and occupants when the vehicle is in front, side impact, or roll-over to obstacles when driving.

These airbag systems are equipped with a front air bag system mounted on a steering wheel or dashboard, and mounted on the side of the seat to protect the user from side impacts of the vehicle when sorted by mounting location. A rollover air bag curtain system that works when the vehicle rolls over, a knee bolster air bag system that protects knees and legs, and a leg airbag foot air bag system). Here, the airbag is subdivided into a driver side air bag (DAB) and a passenger side air bag (PAB), respectively.

In recent years, airbags have a dual-chamber structure to minimize the punch-out forth delivered to the user upon deployment of the cushion.

The double chamber structure according to the prior art can be found in the vehicle passenger protection device (side airbag) of US Patent No. 3,799,575, as shown in FIG.

This protection device can be referred to as a source technology applying a double chamber structure to the side air bag, the inner inflatable bag (2: inner inflatable bag) separately installed in the interior of the airbag cushion (1); A screen 8 fixed inside this internal expansion bag 2 and having a perforated hole; Compression and combustible gas, or combination of explosion-release plugs (4) into a manifold conduit (5) that forms jet port openings (6, 6 ', 6 "). It consists of a storage chamber (3) which discharges a certain fluid into the inner expansion bag (2) and the porous region (1 ') of the cushion (1).

This protection device has a regulation function of gas extrusion by capturing heat transfer and fluid flow due to the expansion of the airbag cushion into the screen 8 and the internal expansion bag 2, and also by means of the screen 8. It has a function of adjusting the direction of the gas flow injected from the manifold conduit 5 (hereinafter referred to as the gas flow directional function).

On the other hand, another example of applying the dual chamber structure to the front air bag can be found in an air bag having an inflation gas diffuser having a gas discharge inflator of US Patent No. 5,573,270.

This patent attempts to properly seal the inner fabric inside the cushion, which acts like an inflation gas diffuser, thereby controlling the gas flow of the inflator. The inner fabric consists of a seamed portion and a non-seamed portion, and uses a gas extrusion control technique without a separate perforated hole. In other words, the inner cloth is a technique of allowing gas to flow in a radial direction and allowing gas to pass through a non-sealed portion between the sealed portions, thereby suppressing gas discharge.

However, the airbag of this technology has a linear flow of gas because it matches the direction of warp threads and warp threads of the cushion fabric and the warp threads and weft of the inner fabric fabric, respectively. This goes relatively smoothly. In addition, when this technique is applied to side airbags having a double chamber structure to protect the driver's thorax and head, the reconstruction of the gas flow becomes quite difficult.

Here, the warp yarn is twisted more than the weft yarn as the yarn in the longitudinal direction (weaving direction) of the original fabric. On the other hand, the weft yarns are crosswise at right angles to the warp yarns in the transverse direction of the fabric, and are generally thicker and less twisted than the warp yarns. Therefore, the airbag cushion and the inner cloth made of the warp and the weft have fine slit lines in the longitudinal direction (weaving direction) of the warp, and thus have a developmental aspect in which a straight flow of gas is shown in the longitudinal direction.

In addition, an example of applying a gas flow directional technique to a side air bag can be found in US Patent No. 5,632,506.

As shown in Figs. 2 and 3, the side air bag 10 is a special cloth material to cushion the gas in the interior 11 'for a predetermined time, and a cushion 11 shaped like a bag, and this cushion The compartment 13 disposed at one end of the compartment 11 and inside the compartment 13, generates gas at the discharge port 15 in accordance with an ignition signal of a sensor control apparatus (not shown). 11) is made up of an inflator 12 which inflates to a predetermined size.

Here, the cushion 11 and the compartment 13 are made by folding a woven material in a loop shape, and are sewn with a plurality of sewing lines 19a to 19d. In the partition chamber 13, the 1st hole 14 is formed in the side surface of the cushion 11, and the 2nd hole 17 is formed in the other side surface. The stud bolts 16 of the inflator 12 are bolted to the frame of the vehicle through the second hole 17 and the third hole 18 formed at the opposite end of the cushion 11 to the outside of the compartment 13. Are combined.

Briefly explaining the operation method of the side air bag, the sensor control device not shown in the inflator 12 installed in the compartment 13 of the cushion 11 in the event of a crash in the vehicle equipped with the air bag 10 The ignition signal is ignited by the ignition signal, the gas is discharged into the interior 11 'of the cushion 11 through the discharge port 15 and the first hole 14, and the user is finally unfolding the cushion 11. Protect the safety of the side of the car.

4 and 5 show another conventional side air bag 20 disclosed in WO 00/20260, the configuration of which is a cushion for forming a lower chamber 22 and an upper chamber 23, respectively. And an inflator 26 formed at one side of the lower end of the cushion 24 to provide gas in the inward direction of the lower chamber 22.

The lower chamber 22 is provided with a plurality of discharge ports 27 for discharging the gas in the upper direction in the cushion 24 direction. In addition, the lower side of the lower chamber 22 is formed in a tube shape surrounding the inflator 26 to generate a gas flow switching member 28 to store the gas therein and to vertically switch the direction in which the stored gas is supplied Is provided.

Thus, looking at the state of use of the configured side airbag 20, when a side collision of the vehicle occurs, the sensing device not shown detects and delivers the electrical signal to the inflator 26, the received electrical signal received The inflator 26 explodes to supply gas.

The gas supplied from the inflator 26 is inverted vertically while hitting the flow switching member 28 to inflate the right side of the lower chamber 22 first, inflate the left side, and then flow upwards, and then the lower chamber 22. Gas passing through the discharge port 27 of the ()) will inflate the upper chamber (23).

However, the vehicle passenger protection device shown in FIG. 1 has a double chamber structure composed of an inner inflatable bag (2) separately installed inside the airbag cushion 1, but the user's chest and head At the same time, since it is not formed in a shape that can protect, it is difficult to protect the user effectively and safely.

In the side airbag 10 of the prior art illustrated in FIGS. 2 and 3, the gas is ejected directly into the interior 11 ′ of the cushion 11 while the gas is ejected from the inflator 12, thus developing the cushion 11. Punch out force generated at the time is delivered directly to the user, thereby having a problem that does not properly ensure the safety of the user.

In addition, in the case of the side airbag 20 shown in FIGS. 4 and 5, the lower chamber 22 is unbalanced by the flow switching member 28 inside the lower chamber 22, and the upper chamber 23 is unbalanced. ) Rotates while punching out, i.e., generates a bag rotation, and thus does not achieve a stable deployment as a whole when the airbag stands up, and the head of the user is in sliding contact with the upper chamber 23 that stands up unstable. It causes a safety problem, it is difficult to control the upper chamber deployment speed.

In addition, the side air bag according to the prior art has a relatively high rate of gas flow between the fabric because the fabric of the lower chamber has a single weaving direction. That is, the conventional side airbag has a relatively high permeability, and thus has a disadvantage in that it is difficult to control the pressure duration inside the airbag.

In addition, since the upper chamber is inflated after the lower chamber is first inflated, the side air bag according to the prior art has a high interaction when the chambers are inflated, and thus there is a high probability of unstable deployment.

The object of the present invention has been devised in view of this point, and provided with cushion pads and gas flow adjusting means, the cushion deployment mode can be deployed in a time-controlled state without eccentricity, the driver and the passenger sitting on the seat To provide a vehicle side air bag that can effectively protect the.

In addition, another object of the present invention is to provide a side airbag for a vehicle capable of stably deploying the second chamber by folding the second chamber inwardly and then folding it into a compact shape.

In addition, another object of the present invention is to supply the gas into the interior of the central chamber formed of a tube tether (tube tether), and then into the interior of the first and second chambers in which the gas of the central chamber is disposed in the downward and upward directions It is to provide a side airbag for a vehicle that can be introduced to stably deploy the cushion without torsion.

The object of the present invention is installed on the side of the back of the vehicle, in the vehicle side air bag having an inflator for supplying gas by exploding by receiving a signal of the electrical wiring during the collision of the vehicle, having a plurality of fitting holes on one side An extension part is formed, and the first and second cushion pads coupled to each other to have a second chamber filled with gas therein, and are folded about half the size between the first and second cushion pads to have a first chamber. A first airbag module installed and formed with a plurality of first gas discharge holes opened upwards, the first airbag module comprising an inner cushion pad forming an inflator installation portion overlapping the extension portion; First and second installation holes are formed to be fitted at both ends of the inflator, and a threaded portion protruding outward is inserted into the insertion hole of the first and second cushion pads and the insertion hole of the inner cushion pad. It is achieved by a side airbag for a vehicle, characterized in that it comprises an inflator module having a fixing member for fixing the airbag module inside the back portion side portion.

In addition, another object of the present invention is to fold the end of the first and second cushion pads disposed on the opposite side of the inner cushion pad to the vicinity of the cushion sewing line, and the right side of the folded first, second cushion pad is left And the right side of the upper side and the right side of the in-plate mounting portion are vertical, and the left side of the folded first and second cushion pads are folded in the right direction and slightly overlap with the right side. The upper side and the left side of the left side portion of the inflate plate mounting portion are vertical, and the lower side of the folded first and second cushion pads are folded upward, and the lower side of the lower side portion of the inflator portion Forming a first airbag module folded in a substantially rectangular shape so as to be substantially horizontal with an upper side, and dividing the first airbag module into three parts to fold each of the final partition parts. Is achieved by a method of folding a vehicle side airbag, it characterized in that it is made of a phase folding.

In addition, another object of the present invention is a third airbag module comprising a fifth, sixth cushion pad having a tether attachment portion in the center of the inner side in the horizontal direction, and a tubular tether sewn to the tether attachment portion to form a central chamber. Includes; The tubular tether is provided with a plurality of gas discharge holes and passages so as to supply gas to the lower first chamber and the upper second chamber in the middle of the third airbag module. Is achieved.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First Embodiment

6 is an exploded perspective view of a side airbag for a vehicle according to a first embodiment of the present invention, FIG. 7 is a view illustrating a state in which a reinforcement pad is installed on an inner cushion pad in a side airbag for a vehicle, and FIG. 8 is a side airbag for a vehicle Figure 1 is a view showing a state in which the first and second cushion pads and the inner cushion pad is sewn, Figure 9 is a view showing a state in which the inflator and the reinforcement member is installed in the vehicle side air bag, Figure 10 is the inflator is operated in the vehicle side air bag FIG. 11A to FIG. 11G are views sequentially showing a folding method of a side airbag for a vehicle.

As shown in Figure 6 and 7, the vehicle side air bag of the present invention is installed in the side of the back portion of the vehicle inflator module 170 for supplying gas by receiving a signal of the electrical wiring 190 when the vehicle crashes And, the first airbag module 100 is expanded by the gas discharged from the inflator 171 of the inflator module 170 to protect the side portion of the user.

The inflator module 170 includes a conventional side airbag inflator 171 and a fixing member 180 having first and second installation holes 182 and 186 formed to sandwich and fix both end portions thereof. Here, the inflator 171 is connected to the electrical wiring 190 connected to the sensor control device not shown. In addition, the fixing member 180 protrudes to the outer surface so that the fitting hole 162 of the reinforcement pad 160, the fitting hole 156 of the inner cushion pad 150, and the first and second cushions will be described in detail below. The thread part 184 penetrates the fitting holes 132 and 142 of the pads 130 and 140, respectively, and serves to fix the first airbag module 100 and the inflator module 170 to the fixing position of the seat. .

The first airbag module 100 includes first and second cushion pads 130 and 140, an inner cushion pad 150, and a reinforcement pad 160.

Here, the first and second cushion pads (130, 140) is a rectangular cloth member using a conventional airbag fabric, the extension portion (133, 143) formed with a plurality of fitting holes (132, 142) on one side Have The inner cushion pad 150 is preferably made of the same fabric as the first and second cushion pads 130 and 140. The inner cushion pad 150 may be folded to about half the size to form the first chamber 151, and then the first and second cushion pads may be formed. It is disposed between the cushion pads (130, 140). The inner cushion pad 150 forms a plurality of first gas discharge holes 152 that are open upward, and installs inflators corresponding to the extension portions 133 and 143 of the first and second cushion pads 130 and 140. Has a region 158. The reinforcement pad 160 has a shape corresponding to the inflator mounting portion 158 and is padded and sewn onto an inner surface of the inflator mounting portion 158. The reinforcement pad 160 is preferably a cloth material having a surface coating as a structural material. The reinforcement pad 160 serves to prevent burns on the openings of the first and second cushion pads 130 and 140 by heat generated when the inflator 171 explodes, and the threaded portion of the fixing member 180. 184 plays a role in assisting the firm fixation.

On the other hand, when the first and second cushion pads 130 and 140 and the inner cushion pad 150 overlap, the warp threads in the longitudinal direction or the woof of the respective warp threads 134, 144 and 154, respectively. The longitudinal directions of are arranged perpendicular to each other. More specifically, the inclinations of the first and second cushion pads 130 and 140 coincide with each other in the longitudinal direction, and the inclination of the inner cushion pad 150 is in the transverse direction. Thus, the first and second cushion pads 130 and 140 and the inner cushion pad 150 have a stacked form in which the weaving directions are perpendicular to each other.

Therefore, when the first and second cushion pads 130 and 140 and the inner cushion pad 150 are sewn to form the first airbag module 100, the inclination of the pads 130, 140 and 150 that overlap each other is formed. The space between 134, 144, 154 and the weft yarn becomes relatively dense. This has the effect of preventing the internal gas from leaking to the outside as much as possible compared to the airbag module which does not consider the direction of warp and weft when overlapping each other.

In addition, the inner cushion pad 150 has a tendency to smoothly flow the gas discharged from the inflator 171 in the horizontal direction because the longitudinal direction of the inclination is the horizontal direction. In addition, the upper portions of the first and second cushion pads 130 and 140 have a vertical direction inclined so that the flow of the gas supplied from the first chamber 151 formed by the inner cushion pad 150 is reduced. It tends to be smooth in the vertical direction.

As such, the present invention can smoothly induce the flow of gas by arranging the inclinations 134, 144, and 154 of the first and second cushion pads 130 and 140 and the inner cushion pad 150 perpendicular to each other. It has a relatively low permeability, which allows for a long bag pressure duration time of the airbag gas pressure.

In addition, the first and second cushion pads 130 and 140 and the inner cushion pad 150 may be locally coated or entirely coated to control the duration of the airbag gas pressure.

Hereinafter, a manufacturing process of the first airbag module 100 using the pads 130, 140, 150, and 160 described above will be described.

First, the reinforcement pads 160 of the first airbag module 100 are disposed on the inner surface of the inflator installation portion 158 of the inner cushion pad 150, and then the fitting holes 156 and 162 are matched and fitted. By forming a circular double sewing line 164 around the balls (156, 162), it is coupled to the inner cushion pad 150. Thereafter, the inner cushion pad 150 is disposed between the first and second cushion pads 130 and 140.

As shown in FIG. 8, in the first airbag module 100, the inflator installation part 158 is opened in a state where the first and second cushion pads 130 and 140 and the inner cushion pad 150 overlap each other. Is sewn as possible, and includes a combined sewing line 136 is supplied from the inflator 171 to seal the gas filled in the first chamber 151 and the second chamber 131.

Here, the inner cushion pad 150 and the first and second cushion pads 130 and 140 of the first airbag module 100 overlap each other in a state in which lower ends thereof coincide with each other, and the inflator installation part 158 is opened. It is sewn along the combined sewing line 136 as possible. The first airbag module 100 sewn by the coupling sewing line 136 has a first chamber 151 and a second chamber 131 partitioned by the inner cushion pad 150.

In addition, both end portions of the coupling sewing line 136 is sewn into the first and second reinforcing lines 137 and 138 formed into a modified elliptical shape. This may prevent breakage of the cushion pads 130, 140, and 150 due to gas pressure when gas is filled into the first chamber 151 and the second chamber 131. The first and second reinforcing lines 137 and 138 may be formed to be slightly shifted from the sewing direction of the coupling sewing line 136.

In addition, when the gas is supplied into the first chamber 151 and the second chamber 131, the first airbag module 100 may be excessively expanded in the first and second cushion pads 130 and 140. A cushion sewing line 146 sewing the central portion of the first and second cushion pads 130 and 140 is prevented. Here, the cushion sewing line 146 is composed of a circular portion 147 formed in a hemispherical shape at both ends and a straight portion 148 connecting the circular portion 147 to each other.

In addition, the diameters of the first gas discharge holes 152 of the inner cushion pad 150 may be 15 mm to 40 so that the deployment speed of the first airbag module 100 may be developed within 1/1000 to 4/1000 seconds. It is preferable to form in the range of mm. The first gas discharge holes 152 are preferably formed in a circular or elliptical shape in consideration of the gas passage amount. In addition, the combined sewing line 136 and the cushion sewing line 146 is preferably formed in two lines.

9 illustrates a method of installing the inflator module 170.

The inflator module 170 that couples the inflator 171 to the fixing member 180 is disposed between inner surfaces of the reinforcement pad 160 coupled to the inflator installation portion 158 for coupling. At this time, the inflator 171 is disposed so that the nozzle portion 172 is located below the inflator installation portion 158.

In addition, the end portions 157 and 159, in which a plurality of pads are stacked, are folded to overlap each other, thereby enclosing the back portion of the fixing member 180, and then the screw portions 184 of the fixing member 180 are fitted with respective fitting holes ( 142 penetrates outward. The protruding screw portion 184 is bolted to a fixed position of the seat (not shown) to fix the first airbag module 100 and the inflator module 170 to the seat.

Hereinafter, the operation and effects of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 10, when a side collision of the vehicle occurs, the sensor control apparatus (not shown) detects a collision signal and transmits an electrical signal to the inflator 170 through the electrical wiring 190. The inflator 170 generates gas at the nozzle unit 172 disposed below in accordance with the operation of the explosion discharge plug.

The gas is injected into the first chamber 151 to apply pressure to the inner cushion pad 150 and increase the size of the first chamber 151.

Thereafter, the gas of the first chamber 151 is injected into the second chamber 131 through the plurality of first gas discharge holes 152 by a pressure increase for a finite time. The gas acts on the upper part of the first and second cushion pads 130 and 140 to increase the size of the second chamber 131. When the operation of the inflator 171 is gradually stopped, the first airbag module 100 is completely inflated.

On the other hand, the first chamber 151 is inflated to about the shoulder of the user when inflated, and primarily protects the user's arms and shoulders, the second chamber 131 is inflated to the head of the user while protecting the face of the user It plays a role.

That is, although the first chamber 151 and the second chamber 131 rapidly expand within 1/1000 to 4/1000 seconds, the gas is discharged from the first chamber 151 to the first gas discharge hole 152 even within a short time. Since it has the effect of slightly delayed discharge time serves to prevent damage to the user's arm or shoulder area.

In addition, the first and second cushion pads 130 and 140 and the inner cushion pad 150 have a genius as a whole, so that the gas is slightly discharged, so that when the first airbag module 100 is inflated rapidly, To prevent it from popping.

In addition, the first and second cushion pads 130 and 140 and the inner cushion pad 150 have the effect of minimizing gas leakage since the weaving directions of the fabrics are vertically overlapped with each other.

Hereinafter, the folding method of the first airbag module 100 according to the present invention is not folded to the exact size and angle, but proceeds step by step according to the following description.

As shown in FIG. 11A, when the first airbag module 100 is disposed on a workbench, the inflator installation part 158 is positioned above.

Thereafter, the worker or a predetermined automatic facility folds the end portions a of the first and second cushion pads 130 and 140 disposed on the opposite side of the inner cushion pad 150 to the vicinity of the cushion sewing line 146. .

As shown in FIG. 11B, the right side part (b) of the folded first and second cushion pads 130 and 140 is folded in the left direction, and the upper side and the right side part (b) of the in-plate installation part 158. The right side of becomes vertical.

Of course, the meaning that the upper side and the right side of the right portion (b) of the in-plate installation portion 158 is vertical is a relative criterion, not an absolute criterion, and among the terms expressed below, a term presenting a criterion is also used as a relative meaning. .

As shown in FIG. 11C, the left portion c of the folded first and second cushion pads 130 and 140 is folded in the right direction and slightly overlaps the right portion b, and the inflator installation portion 158 The upper side of) and the left side of the left part (c) are vertical.

As shown in FIG. 11D, the lower portion (d) of the folded first and second cushion pads (130, 140) is folded upward, and the lower side of the lower portion (d) has an upper side of the inflator installation portion (158). It is almost horizontal with the side. In this case, the folded first airbag module 100 has a substantially rectangular shape.

In addition, the first airbag module 100 folded into a rectangular shape is roughly divided into three parts (e, f, g).

As shown in FIGS. 11E and 11F, the first airbag module 100 is folded so that the lower compartment portion g overlaps with the middle compartment portion f.

In addition, the first airbag module 100 has a half compartment portion h by folding the middle compartment portion f and the lower compartment portion g overlapped in half.

Thereafter, as shown in FIG. 11G, the first airbag module 100 is folded to have the final partition portion i by folding the half compartment portion h upwards twice.

The first airbag module 100 is deployed without being eccentric in the reverse order of the folding step according to the operation of the inflator. At this time, the first airbag module 100 is provided with cushion pads that are laminated or surface-coated perpendicularly to each other in the weaving direction, thereby controlling the duration of the airbag gas pressure and inducing stable deployment of the driver and the passenger sitting on the seat. Keep safe

Second Embodiment

The vehicle side air bag of the present invention described in this embodiment has a tear seam at the center of the third cushion pad, and the third cushion is disposed by pre-sewing the fourth cushion pad inside the third cushion pad. The pad and the fourth cushion pad are gradually developed.

12 is an exploded plan view illustrating the configuration of a vehicle side airbag according to a second embodiment of the present invention, and FIGS. 13 and 15 are plan views illustrating a folding method of the vehicle side airbag.

As shown in FIG. 12, the second airbag module 200 of the present invention includes reinforcement pads 160 and 161, a third cushion pad 230, and a fourth cushion pad 240. It has a relatively simple configuration without a cushion pad.

Here, the third cushion pad 230 is a member forming the first chamber, and has a size and shape corresponding to a thorax portion of the airbag. The third cushion pad 230 has two inflator mounting portions 158 formed on both sides thereof, and forms a tier shim 246 in the center thereof. The tier shim 246 has a length slightly shorter than the width in the vertical direction of the third cushion pad 230 and is broken by a load of a predetermined size, and thus a predetermined space between each break line of the tier shim 246. It creates a role.

The reinforcement pads 160 and 161 have a shape corresponding to the inflator mounting portion 158 of the third cushion pad 230, and are sewn to the inflator mounting portion 158 by a sewing line 290.

The fourth cushion pad 240 is a member forming the second chamber, and when the fourth cushion pad 240 is folded in a direction (i) facing each other along the center line, the fourth cushion pad 240 has a size and shape corresponding to the head portion of the airbag. Both ends 243 and 244 of the fourth cushion pad 240 are sewn to the coupling lines 293 and 294 respectively indicated at the center of the third cushion pad 230.

Thereafter, when the third cushion pad 230 is folded in the direction j facing each other again, the second airbag module 200 is as shown in FIG. 13.

As shown in FIG. 13, the fourth cushion pad 240 of the second airbag module 200 is disposed on the right side, and the third cushion pad 230 overlapping the two sheets is disposed on the left side. At this time, the tier shim 246 is disposed in the center of the second airbag module 200 while being folded in half in the fourth cushion pad 240.

The worker makes the sewing line 291 outside the fourth cushion pad 240 to form a second chamber 131 inside the fourth cushion pad 240. Thereafter, the worker grasps the right end 241 of the sewn fourth cushion pad 240 and folds in the direction l toward the third cushion pad 230 in which the first chamber 151 is to be formed. Again, the operator pulls the rear pad of the third cushion pad 230 in the right direction k to unfold the third cushion pad 230.

FIG. 14 shows a state in which the fourth cushion pad 240, which is pre-sewn and folded, is placed on the left side of the unfolded third cushion pads 230 and 230 '.

The operator pulls the third cushion pads 230 'placed on the right side in the left direction (m) so that the third cushion pads 230 and 230' overlap each other.

As shown in FIG. 15, the worker sews the third cushion pad 230 overlapping each other so that the inflator installation portion 158 is opened along the sewing lines 292 and 295, thereby causing the fourth cushion pad 240 to be opened. The third cushion pads 230 and 230 ′ may be disposed inside the first chamber 151.

The second airbag module 200 of the present invention is folded in the manner described in detail with reference to FIGS. 11A to 11G.

Referring to the main operation method of the second airbag module 200, when the gas is discharged to the first chamber 151 from the inflator (not shown) installed in the inflator installation portion 158, the third cushion pad 230 is It inflates within 10 milliseconds (1 ms = 1/1000 second) and simultaneously forms the chest portion of the airbag, and the tier shim 246 is broken by the internal pressure of the first chamber 151.

Thereafter, the fourth cushion pad 240 disposed inside the first chamber 151 is gradually punched out through the broken tier shim 246 and punched out (n). The fourth cushion pad 240 is inflated within 20ms to 25ms by the gas filled in the second chamber 131, and then forms the head portion of the airbag, thereby decreasing the interaction during inflation. Have

Since the second airbag module 200 sews the fourth cushion pad 240 which is the head part in advance and folds it inside the third cushion pad 230, the second airbag module 200 may gradually develop the chest part and the head part. In addition, it is possible to further reduce the bag rotation phenomenon that is likely to occur during the air bag deployment according to the prior art.

Third Embodiment

FIG. 16 is a plan view illustrating a main configuration of a vehicle side airbag according to a third embodiment of the present invention, FIG. 17 is a perspective view illustrating a method of assembling the vehicle side airbag, and FIG. 18 is an operation relationship of the vehicle side airbag. A diagram for explaining.

As shown in FIG. 16, the third airbag module of the present invention includes a tubular tether 350.

The tubular tether 350 is disposed in the middle of the third airbag module to supply gas to the lower first chamber and the upper second chamber, respectively.

To this end, the tubular tether 350 forms two second gas discharge holes 352 on the fold line 351, and the third tether 350 coincides with each other when the tether is folded based on the fold line 351. A semicircular discharge hole portion 353 ' is formed on the lower side to form a gas discharge hole.

Moreover, the tubular tether 350 forms each channel part 359 on the upper and lower sides of the right side. The passage part 359 serves as a kind of supply pipe through which the gas of the inflator passes when the fifth and sixth cushion pads are sewn. Each of these passage portions 359 sews a reinforcement pad 358 at each end portion, and has a coupling hole 356 that can be inserted into the screw portion of the inflator.

As shown in FIG. 17, the tubular tether 350 is placed in the tether attachment portions 335 and 345 of the fifth and sixth cushion pads 330 and 340 in a folded state.

Of course, the tubular tether 350 also has a stacking form in which the fifth and sixth cushion pads 330 and 340 and the weaving direction are perpendicular to each other, and have the effect of preventing the internal gas from leaking to the outside.

The tubular tether 350 sews all edges except for the upper side including the fold line 351, the semicircular discharge hole 353 ' and the passage part 359 to the tether attachment parts 335 and 345, and the fifth part. And sixth cushion pads 330 and 340. Specifically, the tubular tether 350 and the tether attachment parts 335 and 345 are sewn together to be coupled along the thick dotted line shown in FIG. 17. In addition, since the tethers 350 are also coupled to each other along the seam line (thick dashed line), a central chamber 141 having discharge holes 352 (353 ') formed at upper and lower portions thereof is provided (see FIG. 18).

Thereafter, the fifth and sixth cushion pads 330 and 340 sew the outer portion except for the inflator installation portion 158 to complete the third airbag module 300.

Of course, the third airbag module 300 is folded by the folding method described in the first embodiment, and has the following gas flow when the airbag is deployed.

As shown in FIG. 18, the gas flow of the third airbag module 300 starts from an inflator (not shown) installed in the inflator mounting portion 158. Here, the inflator is disposed so that the nozzle portion is located above the inflator installation portion 158. Therefore, the gas discharged from the nozzle portion during operation of the inflator proceeds through the passage portion 359 of the tubular tether 350 to the inside of the central chamber 141 (o), thereby inflating the tubular tether 350. That is, gas is advanced between the tubular tethers 350 that are folded about the fold line 351. In addition, the gas of the central chamber 141 is supplied into the first chamber 151 and the second chamber 131 through the second gas discharge hole 352 and the third gas discharge hole 353 ' p, q), therefore, the first chamber 151 and the second chamber 131 are expanded.

Since the third airbag module 300 diverges gas from the central chamber 141 formed in the middle by the tubular tether 350 to the first chamber 151 and the second chamber 131, the back rotation is performed. The phenomenon can be reduced relatively.

In particular, the third airbag module 300 adjusts the size of the holes of the gas discharge holes 352 and 353 'formed in the tubular tether 350, thereby controlling the deployment of the bag. In addition, since the third airbag module 300 is supplied with gas through the tubular tether 350, the gas air has a relatively long duration of gas pressure and a tendency to reduce interaction during expansion.

Therefore, as described above, the vehicle side airbag according to the present invention has a low permeability and a relatively long gas pressure duration because the weaving directions of the cushion pad and the tubular pad are arranged perpendicular to each other, thereby providing excellent operation efficiency. There is an advantage.

In addition, the vehicle side air bag according to the present invention inflates the first chamber and then gradually expands the second chamber or supplies gas from the central chamber to expand the first chamber and the second chamber almost simultaneously, There is an advantage to minimize the interaction of the.

In addition, the side air bag for a vehicle according to the present invention, while the second chamber pre-sewn sewn in the first chamber is gradually inflated and exits through the tier seam, and is then inflated, thereby reducing a back rotation phenomenon that is likely to occur in the existing side air bag. It is a very useful and effective invention that can protect the face of the user more effectively.

In addition, the side air bag of the present invention has the effect that the amount of the cushion pad used is small, the sewing method is simple, and the folding operation is advantageous, thereby reducing the cost.

And, by controlling the size of the first gas discharge hole formed in the first chamber of the inner cushion pad has the advantage of easily controlling the discharge time of the gas.

Although the technical idea of the side airbag for a vehicle of the present invention has been described with the accompanying drawings, this is for illustratively describing the best embodiments of the present invention, but not for limiting the present invention. In addition, it is obvious that any person skilled in the art can make various modifications and imitations without departing from the scope of the technical idea of the present invention.

1 is a perspective view cut in a predetermined portion to explain the configuration of the side air bag according to the prior art,

Figure 2 is a perspective view showing another kind of side air bag according to the prior art,

Figure 3 is a side cross-sectional view showing a side air bag shown in FIG.

Figure 4 is a perspective view showing another conventional type of side air bag,

FIG. 5 is a side sectional view showing the side airbag shown in FIG. 4;

6 is an exploded perspective view of a side airbag for a vehicle according to the first embodiment of the present invention;

Figure 7 is a view showing a state in which the reinforcement pad is installed on the inner cushion pad in the vehicle side air bag shown in Figure 6,

FIG. 8 is a view illustrating a state in which a first cushion pad and an inner cushion pad are sewn in the vehicle side air bag shown in FIG. 6;

9 is a view showing a state in which the inflator and the reinforcement member is installed in the vehicle side air bag shown in FIG.

FIG. 10 is a view illustrating a state in which gas is generated by operating an inflator in the vehicle side air bag shown in FIG. 6;

11A to 11G are views sequentially showing a folding method of the side airbag for a vehicle shown in FIG. 6;

12 is an exploded plan view illustrating a configuration of a side airbag for a vehicle according to a second embodiment of the present invention;

13 and 15 are plan views illustrating a folding method of the side airbag for a vehicle shown in FIG. 12;

16 is a plan view for explaining the main configuration of the side airbag for a vehicle according to a third embodiment of the present invention;

17 is a perspective view for explaining a method of assembling the side airbag for a vehicle using the main configuration shown in FIG.

18 is a view for explaining the operation relationship of the vehicle side airbag shown in FIG.

      -Explanation of symbols for the main parts of the drawings-

100 1st Airbag Module 130 1st Cushion Pad

132, 142, 156, 162 ... fitting 36 ... bond sewing line

140 Cushion pad 146 Cushion sewing line

150.Internal cushion pad 152 ... First gas exhaust hole

158 Inflator mounting area 160, 161 reinforcement pad

* 164 ... seam line 170 ... inflator module

171 Inflator 180 fixing member

182 1st installation 184 Screw thread

190 ... Electrical wiring 200 ... Second airbag module

246.Tier Sim 300 ... 3rd Airbag Module

350 Tubular Tether 359 Passage Section

Claims (3)

In the vehicle side air bag which is installed on the side of the back of the vehicle, and has an inflator for supplying gas by exploding by receiving a signal of electric wiring when the vehicle collides, Fifth and sixth cushion pads 330 and 340 having tether attachment parts 335 and 345 formed transversely on the inner side surface thereof; A tubular tether (350) sewn to the tether attachment parts (335, 345) to form a central chamber (141); Configure the airbag module 300, including; The tubular tether 350 is attached to the tether attachment portions 335 and 345 between the fifth and sixth cushion pads 330 and 340, so that the upper second chamber 131 and the lower first chamber 151 are attached to each other. Is formed, In the tubular tether 350, gas discharge holes 352 and 353 ′ are provided at upper and lower portions of the tubular tether 350 to supply gas to the second chamber 131 and the first chamber 151 of the airbag module 300, respectively. A side airbag for a vehicle, each of which is formed, and a passage portion 359 is formed on the inflator installation portion 158 side. The method of claim 1, The passage portion (359) is a side airbag for the vehicle, characterized in that each of the reinforcement pad 358 is sewn to the end portion, and has a coupling hole (356) that can be inserted into the screw portion of the inflator. The method according to claim 1 or 2, The tubular tether 350 is a vehicle side airbag, characterized in that the fifth and sixth cushion pads (330, 340) and the weaving direction is perpendicular to each other in a stacked form.