KR100806592B1 - Airbag apparatus for protecting passenger - Google Patents

Abstract

An airbag apparatus for protecting a passenger is provided to safely protect the passenger by fastening a lower body of the passenger and preventing the passenger from crashing against external materials through expanding of an airbag. An airbag apparatus for protecting a passenger includes an inflator(20), a plurality of operation gas paths(110), and an airbag. The inflator, which is installed in a seat back(100), connected with a crash detecting sensor(10) expands operation gas when detecting a crash. The operation gas paths are connected to the inflator and are installed in the seat back. The airbag includes a front projection airbag and a belt airbag. The airbag is expanded through a cut part formed on an edge surface of the seat back when the operation gas is expanded. The front projection airbag is connected to any one of the operation gas paths and is shaped as a pipe projected forward. The belt airbag is connected to the front projection airbag and is expanded by inflow of the operation gas passed through the front projection airbag. One end of the belt airbag is fixed at a middle of an upper end part of the seat back and the other end of the belt airbag is fixed at a lower end part of a side surface of the seat back.

Description

Airbag device for occupant protection {AIRBAG APPARATUS FOR PROTECTING PASSENGER}

1 is a front view showing a vehicle seat and a seatback equipped with an airbag protection apparatus for occupants according to the present invention.

Figure 2a and Figure 2b is a front view showing the state when the operation of the passenger-protected airbag device according to the present invention.

Figure 3a and Figure 3b is an operating state diagram showing the operation of the occupant protection airbag apparatus according to the present invention.

※ Explanation of symbols for main parts of drawing

10: collision detection sensor 20: inflator

30: auxiliary inflator 40: cylinder

50: piston 100: seatback

110: operating gas passage 120: felt cover

200: seat 210: auxiliary actuator gas passage

300: airbag 310: forward protrusion airbag

320: belt airbag 330: chest protection airbag

The present invention relates to an airbag device for protecting a passenger, and more particularly, to effectively protect the occupant by holding the upper body of the occupant so as not to protrude forward while absorbing a shock applied to the upper body of the occupant in the event of a collision with a vehicle. The present invention relates to an airbag device for protecting a passenger that can sufficiently protect a passenger's life.

In addition to seat belts, airbags are a typical occupant protection device that is used to reduce the risk of injury or the severity of injuries by preventing the occupants from colliding with the structures in the vehicle.

The airbag device is composed of a detection system and an airbag module. The detection system is composed of a sensor, a battery, a diagnostic device, and the like. The airbag module is composed of an airbag and an operating gas inflator called an inflator. When a collision is detected by the sensor, the inflator explodes, and the nitrogen gas generated by the explosion causes the airbag to inflate instantly. The time it takes for the airbag to fully operate from a crash is usually as short as 50 / 1,000 seconds. The gas used in the airbag is either a high pressure gas generated by rapid combustion of a solid or a gas stored in a high pressure gas container. The use of passengers in collisions is very good and the use is increasing rapidly around the world.

Conventional airbags are generally mounted inside the steering wheel or the upper part of the console box to protect occupants in the event of a frontal collision of the vehicle.In recent years, vehicle safety equipment has been developed and safety awareness has increased. Curtain airbags are mounted inside the pillar trim or side airbags inside the seat back to protect the occupant in the event of a crash. Some of the trim covers covering the airbags have an incision that has less resistance to inflation of the airbags than others so that the airbags will deploy correctly in a constant direction when the airbags inflate.

However, the conventional airbag apparatus as described above serves to prevent the occupant from directly colliding with the structure in the vehicle, but does not serve to hold the occupant's position in a certain range during the collision.

Conventionally, seat belts hold the occupants, but seat belts do not themselves absorb shock, so the seat belts are stretched by a considerable length in the event of a collision to mitigate the impact of the seat belts on the body. As it shrinks, it catches the upper body. In this process, however, the upper body of the occupant is protruded a considerable distance in the future, and if there is no air bag, there is a big risk that the driver will hit the steering wheel strongly, and even if there is an air bag, there is a possibility of being hit by the air bag. Even when hitting the airbags in front of the strong hits, especially in the case of children may be a significant injury even hitting the airbags, and in this way, when the upper body of the passengers in the car is greatly shaken, various risks must follow.

In addition, the seat belt does not prevent the occupant from falling out sideways, there is a problem that the occupant may be injured by coming out of the seat belt and hit the object in the vehicle depending on the collision direction, such as side collision.

In addition, children on school buses, passengers on regular buses, passengers on airplanes and other passengers who are less concerned about safety may not be wearing seatbelts. When a shock is suddenly applied, there is a problem that an accident cannot be received without being protected by the minimum safety equipment.

The present invention has been made to solve the problems of the prior art, the present invention to securely hold the upper body and lower body of the occupant in the event of a collision such as a vehicle to prevent the occupant from being injured or killed by jumping forward. It is an object of the present invention to provide an occupant protection airbag device that secures the occupant even when the seat belt is not worn.

The present invention for achieving the above object is provided in the interior of the seat back (seat back), connected to the collision detection sensor and the inflator (inflator) to expand the working gas upon collision detection, and is connected to communicate with the inflator And a plurality of working gas passages provided in the seat back, and stored at the edge of the seat back when the working gas is not expanded, and when the working gas is inflated, it cuts out and expands through an incision formed on the edge surface of the seat back. An air bag including a belt air bag is provided with a pair of left and right symmetrical pairs of the airbag is connected to one of the operating gas passage and has a tubular shape inflated while protruding toward the front and seats in the forward protrusion process Seat occupant so as not to be blocked by the occupant's body One end is fixed to the edge of the non-reaching seatback, and the belt airbag is connected to communicate with the forward projecting airbag, inflated by the inflow of the working gas passing through the forward projecting airbag, and one end is fixed in the middle of the upper end of the seatback. One end is configured to include an airbag that is secured to the lower side of the seatback and configured to hold the upper body of the seat occupant so as not to protrude forward by both belt airbags extending across both shoulder seats of the seat occupant upon completion of inflation.

In addition, the auxiliary inflator provided inside the seat and connected to the collision detection sensor to expand the working gas upon collision detection, and connected to communicate with the auxiliary inflator, provided on both sides of the inside of the seat and have a rounded shape upwards A pair of cylinders, which are bent in the form of the cylinder, are stored inside the cylinder and inside the seat when the actuator is unexpanded and move along the cylinder when the actuator is expanded to form on both edge surfaces of the seat. It is preferred to further comprise a lower body protection means comprising a pair of pistons which are cut out and cut out to cover the upper sides of both thighs of the seat occupant, and when the operation is completed, so that one end portion is not caught by the cylinder. .

In addition, the front protrusion airbag has a first front protrusion airbag, one end of which is fixed at the upper end of the seat occupant's shoulder, and a second forward protrusion at which one end of the upper portion of the seatback edge is fixed to the shoulder side of the seat occupant. It is preferred to include an airbag and three separate forward outgoing airbags of the third forward outgoing airbag, one end of which is fixed to the side of the seat occupant's side of the bottom of the seatback edge.

In addition, it is preferable to further comprise a chest protection airbag connected to communicate with the belt airbag and configured to be inflated in front of the chest of the seat occupant by the working gas flowing through the belt airbag.

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

1 shows a seat and a seatback of a vehicle equipped with an airbag apparatus according to the present embodiment.

The airbag device draws power directly from the battery. In the present embodiment, the collision detection sensor 10 may be mounted inside the seatback 100 or may be attached to another structure such as the front frame of the vehicle other than the seatback 100. The inflator 20 connected to the collision detection sensor 10 is installed inside the seatback 100. The collision detection sensor 10 is configured to trigger the airbag 300 at the time of collision detection. When an electrical spark occurs immediately after the collision, the gas in a small vessel is ignited, which in turn ignites the propelant (oxidant + fuel) in the inflator 20 and exhales nitrogen gas. This gas is the gas that fills the airbag 300.

Combustion propelant generates nitrogen gas, which travels to the airbag 300 through a working gas passage 110 connected to the inflator 20. The actuator gas passage 110 is a narrow tube made of a rigid material installed inside the seatback 100 to connect the inflate 20 and the airbag 300 installed over the top and side ends of the seatback 100.

The airbag 300 is normally mounted one on each of both upper portions of the seat back. One airbag 300 extends from the middle of the top edge of the seatback 100 to the corner of the seatback 100 along the top edge and from there inside the felt cover 120 which is arranged long from the side edge to the bottom edge of the side edge. It is stored. The felt cover 120 maintains only the minimum strength of protecting the airbag 300. The thickness of the pad of the cutout of the felt cover 120 is much thinner than the thickness of other portions of the felt cover 120 so that the airbag 300 is easily broken by the deployment force. Thus, the deployment direction of the airbag 300 is configured to be forward.

On the other hand, the seat 200 is provided with a separate device to hold the thigh portion of the occupant. The inside of the seat 200 is provided with an auxiliary inflator 30 connected to the collision detection sensor 10. The auxiliary inflator 30 is of the same kind as the inflator 30 of the airbag apparatus. Auxiliary working gas passage 210 is connected to the auxiliary inflator 30 and the auxiliary working gas passage 210 communicates with the cylinder 40. The piston 50 is mounted inside the cylinder 40. The cylinder 40 and the piston 50 have a shape that is bent upwardly so as to cover the thigh of the occupant sitting on the seat 200 when the piston 50 is pushed to the end. Incisions are also formed at both edges of the seat 200 so that the piston 50 is easily torn out of a portion of the seat 200.

2A and 2B show a state in which the devices described with reference to FIG. 1 have been completed by a collision of a vehicle, and FIG. 2A shows the occupant without the occupant, and FIG. 2B shows the same state including the occupant.

Airbag 300 has a total of two so as to span both shoulders, one airbag consists of three forward protrusion airbag 310, one belt airbag 320 and one chest protection airbag 330.

The forward protrusion airbag 310 is a portion that is directly connected to the operating gas passage 110 installed in the seat 200 is a corrugated pipe shape, when unexpanded, is folded and folded at the edge of the seat 200 when the tube is inflated. Inflates long in the longitudinal direction. At this time, one end is fixed to the seat 200 and is not fixed, and the other end that is stored toward the front of the seat 200 exits the cutout of the seat 200 and protrudes forward by a predetermined distance to the front. Each of the protruding airbags 310 completes inflation. One of the forward protrusion airbags 310 is installed behind the occupant's neck, one at the upper side lateral edge of the seat 200, and the other at the lateral center edge of the seat 200.

On the other hand, the belt airbag 320 is connected to communicate with one end of the non-fixed forward projecting airbag 310 is through the forward projecting airbag 310 as soon as the forward projecting airbag 310 is inflated to the belt airbag 320 Incoming working gas causes expansion. One end of the belt airbag 320 is fixed to the top edge of the seat 200 at the back of the passenger's neck, and the other end is fixed to the edge of the side center portion of the seat 200, so that the expansion of the belt airbag 320 is completed. As shown in FIG. 2B, the belt airbag 320 is attached to both shoulders of the occupant like a backpack strap when the occupant carries the backpack, thereby holding the upper body of the occupant so that the upper body of the occupant is not forwarded.

In addition, two chest protection airbags 330 are additionally inflated between the two belt airbags 320, which protects the occupant's chest. The chest protection airbag 330 is connected in communication with the intermediate portion of each of the belt airbags 320 and has a round shape.

In addition, the auxiliary inflator 30 installed inside the seat 200 also operates simultaneously with the inflator 20 of the airbag apparatus. The working gas generated from the auxiliary inflator 30 passes through the auxiliary working gas passage 210 to the cylinder 40 and pushes the piston 50 out of the cylinder 40 so that the piston 50 seats 200. It escapes through the incision and wraps the thigh portion of the occupant as shown in Figure 2b to hold the lower body portion of the occupant not to be pushed forward. In this state, the end of the piston 50 is caught by the cylinder 40 so as not to fall out. The piston 50 here is not made of a cloth cushion like the airbag 300, but is made of a rubber-based synthetic resin that gives a somewhat soft feel while being rigid to some extent.

Since the device should not interfere with the occupant's escape from the car after an accident, the lower body holding device should be operated by installing a separate switch or lever. It is desirable to install so that the function to hold the can be released.

3A and 3B are side views of an operation of the airbag apparatus according to the present embodiment.

As shown in FIG. 3A, when the inflator 20 emits nitrogen gas, the three forward protrusion airbags 310 are inflated and protrude forward, and the end of the protruding forward airbag 310 is the shoulder position of the occupant. Is located further ahead. The forward protrusion airbag 310 is mounted at the edge of the seatback 100 that is not covered by the occupant's body during the forward protrusion. If there is no front airbag 310 and there is only the belt airbag 320, the front airbag 310 is inflated at the front of the passenger's shoulder, so the front airbag 310 may not be wrapped around the passenger's shoulder and swells behind the passenger's back. This is necessary.

In addition, as shown in FIG. 3B, the front airbag 310 swells and the belt airbag 320 swells. However, since the upper and lower ends of the belt airbag 320 are fixed to the seatback 100, the front of the occupant's shoulder. When inflated, it naturally stretches up and down to cover the occupant's shoulders. As a result, the upper body of the occupant is prevented from moving forward greatly.

In addition, after the belt airbag 320 is swollen, the chest protection airbag 330 is swollen at the occupant's chest to prevent an impact that may be applied to the occupant's chest and face.

As described above, the present invention has been described only with respect to specific examples, but it will be apparent to those skilled in the art that various changes and modifications can be made within the technical spirit of the present invention based on the above specific examples. And modifications belong to the appended claims.

As described above, according to the airbag device for protecting the occupant according to the present invention, even if the seat belt is not fastened, the upper body of the occupant is protected by catching the upper body of the occupant in the event of a collision such as a vehicle, thereby protecting the occupant's upper body and impacting the upper body of the occupant. This absorbing airbag is minimized by the impact on the occupant, and in addition, the lower body of the occupant is held unsteadily while the airbag is inflated in front of the occupant's chest, preventing foreign matter from hitting the face or chest. The advantage is that the occupants are as secure as possible. Therefore, it can be used as an excellent stabilizer not only for the seat of a general car but also for the seat of a children's school bus or an aircraft.

Claims (4)

An inflator provided inside the seat back and connected to the collision detection sensor to expand the working gas upon collision detection; A plurality of working gas passages connected to the inflator and provided inside the seat back; And When the actuator is not inflated, it is stored at the edge of the seatback, and when the actuator is inflated, a pair of left and right symmetrical airbags is provided, which are cut out and inflated by the cutout formed on the edge surface of the seatback. As an airbag becoming The forward projection airbag is connected to communicate with one of the working gas passages and has a tubular shape that is inflated while being protruded toward the front and the seatback of the seat back that does not touch the body of the seat occupant so as not to be blocked by the seat occupant's body during the forward protrusion process. One end fixed to the edge, The belt airbag is connected to communicate with the forward projecting airbag and is inflated by inflow of the working gas passing through the forward projecting airbag, one end of which is fixed to the middle of the upper end of the seatback, and the other end of the belt airbag is fixed to the lower side of the side of the seatback. And an airbag configured to hold the upper body of the seat occupant so as not to protrude forward by both belt airbags being completed in front of both shoulders of the seat occupant upon completion. The method of claim 1, A pair of auxiliary inflator provided inside the seat and connected to the collision detection sensor to expand the working gas upon collision detection, connected to communicate with the auxiliary inflator, provided on both sides of the seat, and having a curved shape in a side upward direction. A cylinder and a cutout formed in the shape of the cylinder and stored in the interior of the cylinder and the seat when the operating gas is unexpanded and moved along the cylinder when the working gas is expanded to form cutouts formed on both edge surfaces of the seat. Passenger characterized in that it further comprises a lower body protection means that comprises a pair of pistons that are cut out to cover the top of both thighs of the seat occupant, and when the operation is completed so that one end portion is caught by the cylinder does not fall out Protective airbag device. The method according to claim 1 or 2, The front projecting airbag includes a first front projecting airbag, one end of which is fixed at the upper end of the seat occupant's shoulder, and a second forward projecting airbag, at which one end of the upper part of the seatback edge is fixed to the side of the seat occupant's shoulder. Passenger protective airbag device characterized in that it comprises three separate front forward airbags of which one end is fixed to the side of the seat occupant side of the lower portion of the seatback edge. The method according to claim 1 or 2, And a chest protection airbag connected to communicate with the belt airbag and configured to be inflated in front of the chest of the seat occupant by an operating gas introduced through the belt airbag.

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