KR0140387Y1 - Air bag of a car - Google Patents

Abstract

The present invention relates to a vehicle airbag device, the purpose of the present invention is to adjust the amount of gas generated according to the distance between the driver and the airbag device to adjust the inflation speed of the airbag by the driver after the airbag is fully inflated It is to provide a vehicle airbag device that hits.

In the vehicular airbag apparatus according to the present invention, the distance between the driver and the airbag 12 is sensed, and according to the distance, a part of the gas generating agent of the gas generator 100 is sealed with the plate member 150 to adjust the amount of gas generated.

Therefore, the driver is prevented from hitting the airbag 12 while the airbag 12 is inflated, and the driver is prevented from injuring by inflation of the airbag 12 by hitting it after the airbag 12 is fully inflated, thereby preventing the injury of the airbag device. This has the advantage of being able to function properly.

Description

Car airbag device

The present invention relates to an airbag, and more particularly, to an airbag device for a vehicle capable of adjusting a gas generation amount according to a distance between a driver and an airbag device by improving a structure of a gas generator supplying gas to an airbag.

In general, an air bag device is mounted on a steering wheel to absorb shock by using an air bag functioning as a cushion in the event of a crash in the event of a car crash, thereby ensuring the safety of the occupant. This is a cross-sectional view showing the internal structure of the device.

As shown in the drawing, the airbag device 10 is coupled to the center portion of the steering wheel, and has a cover 11 with an open bottom, and the airbag 12 is folded and stored inside the cover 11. A back ring 13 supporting the air bag 12 is provided inside the air bag 12, and the housing 14 is coupled to the opening of the cover 11. The plate 15 surrounding the housing 14 is coupled to the cover 11, and a gas generator 20 penetrates the plate 15 to inject gas into the air bag 12 to cause the air bag 12 to expand. Partly inserted into the airbag 12 and installed.

Among the components constituting the airbag apparatus, the conventional gas generator is provided with a case 21 constituting the body of the gas generator 20, as shown in FIG. It is partitioned into three rooms by the partition walls 25 and 26 which comprise. First, the charge chamber 22 is provided in a space formed in the center of the case 21. The charge chamber 22 includes a claim chamber 22a in which gunpowder is embedded in the center, and an auxiliary chamber 22b in which gunpowder is formed and formed around the upper side of the claim chamber 22a. Among them, the claim cabinet 22a is connected to an ignition unit 30 that receives a command from a control unit installed in the vehicle and ignites the gunpowder embedded in the claim chamber 22a. The space formed outside the charging chamber 22 includes a gas generating agent, and a combustion chamber 23 provided with a filter 23a on an inner side thereof is provided, and a filter 24 is provided in a space formed outside the combustion chamber 23. Is provided with a filter chamber (24). The filter 24a functions to filter harmful substances, flames, and the like contained in the nitrogen gas generated in the combustion chamber 23. These charging chambers 22, combustion chambers 23, and filter chambers 24 are sealed by partition walls 25 and 26, but partition walls 25 and 26 allow the generated gas to be injected into the airbag 12. Discharge holes 25a and 26a are formed each time, and a plurality of injection holes 21a are formed on the upper surface of the case 21.

The operation of the airbag by the conventional gas generator configured as described above is as follows.

When the vehicle collides, a control unit (not shown) installed in place of the vehicle sends a signal to the ignition unit 30 and the ignition unit 30 ignites the gunpowder in the claim chamber 22a. When the explosives of the auxiliary chamber 22b formed around the explosion chamber 22a explode, the flame of the auxiliary chamber 22b flows out into the combustion chamber 23 through the discharge hole 26a, The gas generator is burned to generate high pressure nitrogen gas. Nitrogen gas generated in the combustion chamber 23 flows into the filter chamber 24 through the filter 23a and the discharge hole 25a, and is injected into the airbag 12 through the injection hole 21a through the filter 24a. The air bag 12 is inflated.

However, the airbag device is intended to be used as a safety device to reduce human injury, but there is a problem that may cause injury to the driver depending on the distance between the driver and the airbag device. In detail, the amount of gas generated by the airbag device during the collision of the vehicle is constant regardless of the distance between the driver and the airbag device.If the driver is seated and driven at a distance away from the airbag device, In a crash, the driver will hit the airbag after it has been fully inflated. However, if the driver is seated in a position away from the airbag device to drive, the driver will not fully inflate and hit the airbag in the inflation process. The problem is caused by injury.

An object of the present invention is to provide a vehicle airbag device in which the driver hits the airbag after the airbag is fully inflated by controlling the inflation speed of the airbag by appropriately adjusting the amount of gas generated according to the distance between the driver and the airbag device. .

1 is a cross-sectional view showing the configuration of a general airbag apparatus.

2 is a cross-sectional view showing the internal structure of a conventional airbag device gas generator.

3 is a cross-sectional view showing the internal structure of the airbag device gas generator according to the present invention.

4 is a view showing the operation of the airbag device gas generator according to the present invention.

Explanation of symbols on the main parts of the drawings

10 Airbag unit 12 Airbag 100 Gas generator

102.Compartment wall 120 ...

150 Plate member 160 Electromagnet 190 Sensor

In order to achieve the object of the present invention, the present invention is an airbag installed on the steering wheel, a gas generator attached to the airbag to inject the gas to the airbag according to the signal of the control unit, the medicine chamber is formed inside the gas generator and the gunpowder, A vehicle airbag apparatus having a combustion chamber in which a gas generating agent is embedded, a charging chamber and a partition wall partitioning the combustion chamber, wherein the interior of the combustion chamber is partitioned, and a plate-shaped member having one end freely contacting the partition wall side is provided. The discharge hole is formed so that the combustion chamber and the compartment chamber are communicated with each other, and the plate member acts with the free end on one side of the combustion chamber so that the plate member selectively seals a part of the combustion chamber according to a signal of a sensing unit detecting a distance between the airbag and the driver. An operating means is provided.

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

The airbag device according to the present invention is the same as the conventional components except for the internal structure of the gas generator, and thus the same components will be described using the same names and the same reference numerals.

As shown in FIG. 1, a general airbag apparatus to which the present invention is applied is coupled to a central portion of a steering wheel, and a cover 11 having an open bottom is provided, and the airbag 12 is folded inside the cover 11. It is settled and stored. A back ring 13 supporting the air bag 12 is provided inside the lower side of the air bag 12, and the housing 14 is coupled to the opening of the cover 11. The plate 15 enclosing the housing 14 is coupled to the cover 11 and the gas generator 100 as shown in FIG. 3 so as to inject gas into the air bag 12 to expand the air bag 12. Partly inserted into the airbag 12 through the plate 15 is installed.

The gas generator 100 for injecting gas into the airbag is provided with a case 110 constituting a body, and the case 110 is partitioned into three rooms by partition walls 101 and 102 installed in a circumferential direction to form a concentric circle. do. First, the charge chamber 120 is provided in a space formed in the center of the case 110. The charge chamber 120 includes a claim chamber 121 having gunpowder embedded in the center, and a subsidiary chamber 122 having a gunpowder built in the upper circumference of the claim chamber 121. Among them, the claim chamber 121 is connected to an ignition unit 170 that receives a command from the controller 180 installed in place of the vehicle and ignites the gunpowder embedded in the claim chamber 121. A space formed outside the charging chamber 120 includes a gas generating agent, and a combustion chamber 130 including a filter 133 is provided on an inner side thereof, and a space formed outside the combustion chamber 130 is provided on an inner side thereof. The filter chamber 140 provided with the filter 141 is provided. The filter 141 functions to filter harmful substances or flames contained in the nitrogen gas generated in the combustion chamber 130. These charging chambers 120, combustion chambers 130, and filter chambers 140 are sealed by the partition walls 101 and 102, but discharge holes are formed in the partition walls 101 and 102 so that the generated gas can be injected into the airbag 12. 101a, 101b, 102a, and 102b are formed, and a plurality of injection holes 111 are formed on the upper side of the case 120.

Particularly, discharge holes 102a and 102b are formed in upper and lower portions in the partition wall 102 that divides the charging chamber 120 and the combustion chamber 130, and the combustion chamber 130 has an upper discharge hole 102a and a lower discharge. It is partitioned into the upper space 131 and the lower space 132 by the plate member 150 so as to communicate with each of the ball (102b). One end of the plate member 150 in contact with the partition wall 102 bordering the charging chamber 120 is a free end 151. In addition, the operating means is selectively sealed to a part of the combustion chamber 120 so as not to be in communication with the free end 151 of the plate member 150 so as not to communicate with the lower discharge hole 102b. Prepared. The operation means is installed in a steering wheel and the like is operated according to the signal of the sensing unit 190 for detecting the distance between the airbag 12 and the driver, the operation means has an electromagnet 160 which is magnetized in accordance with the supply of current do.

Referring to the operation of the airbag device according to the present invention configured as described above are as follows.

When the vehicle collides, the control unit 180 installed in place of the vehicle sends a signal to the ignition unit 170 and the ignition unit 170 ignites the gunpowder in the claim chamber 121. At this time, when the distance between the airbag 12 and the driver is detected by the sensing unit 190 or more than a certain distance, the charging chamber 120 and the combustion chamber 130 are all in communication without operating the operation means, the combustion chamber 130 Burn all gas generators. In detail, when the explosives of the auxiliary chamber 122 formed around the explosive chamber of the claim chamber 121 are exploded, the flames of the auxiliary chamber 122 are fired through the upper and lower discharge holes 102a and 102b. ), And all the gas generators are burned by the flame to generate high pressure nitrogen gas. Nitrogen gas generated in the combustion chamber 130 is introduced into the filter chamber 140 through the filter 133 and the discharge holes 101a and 101b, and again through the injection hole 111 through the filter 141. Is injected into the airbag 12 to inflate.

However, when the sensing unit 190 detects the distance between the driver and the airbag 12 within a predetermined distance, the sensing unit 190 sends a signal to the control unit 180, and the control unit 180 sends a signal to the operation means to supply current. To supply the, to form an electromagnet 160. 4, the free end 151 of the plate-like member 150 is in close contact with the electromagnet 160 and a part of the gas generating agent is blocked from the charging chamber 120 so that the flame does not affect it. In this case, the flame caused by the ignition by receiving the signal from the ignition unit 170 burns only the gas generating agent in the upper space 131 of the combustion chamber 130 to generate nitrogen gas, and the nitrogen gas passes through the filter 141. It is injected into the airbag 12 to inflate the airbag 12. In this case, since only a part of the gas generating agent was burned down and the amount of nitrogen gas was reduced, the inflation time was short, so that the driver sitting at a distance within the predetermined distance from the air bag 12 hits the air bag 12 after the air bag 12 is fully inflated. It will prevent injuries.

As described above in detail, in the vehicle airbag apparatus according to the present invention, the distance between the driver and the airbag is sensed, and according to the distance, a part of the gas generator of the gas generator is sealed with a plate member to adjust the amount of gas generation.

Therefore, there is an advantage that the driver can prevent the airbag from hitting the airbag in the inflated state, and the driver can hit the airbag after fully inflating to prevent injury due to the expansion of the airbag, thereby performing the proper function of the airbag apparatus.

Claims (2)

An airbag 12 installed in a steering wheel, a gas generator 100 attached to the airbag 12 to inject gas into the airbag 12 according to a signal from the controller 180, and inside the gas generator 100. The airbag apparatus for a vehicle having a charge chamber 120 having a gunpowder embedded therein, a combustion chamber 130 having a gas generating agent therein, and a partition wall 102 partitioning the charge chamber 120 and the combustion chamber 130. In The inside of the combustion chamber 130 is partitioned, and a plate-like member 150 having one end portion in contact with the partition wall 102 side at the free end 151 is provided, and the partition wall 102 has the partitioned combustion chamber. Discharge holes (102a, 102b) are formed so that the 130 and the chamber 120 is in communication with each other, the plate member (in accordance with the signal of the sensing unit 190 for detecting the distance between the airbag 12 and the driver ( Vehicle airbag device, characterized in that the operating means for working with the free end 151 is provided on one side of the combustion chamber 130 so that 150 selectively seals a portion of the combustion chamber (130). The method of claim 1, The operation means is a vehicle airbag device, characterized in that it comprises an electromagnet 160 which is magnetized by receiving a current in accordance with the signal of the sensing unit (190).