JP2009126392A - Airbag device for side impact - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To switch gas passages in simple and low-cost structure in selectively supplying gas from an inflator to a plurality of airbag members. <P>SOLUTION: When the inflator 12 actuates at the time of a side collision, gas blown from the inflator 12 flows through a gas introducing part 26 into a change-over valve 18. At this time, the change-over valve 18 actuates based on inertial force and gas pressure at the time of the side collision, so that gas is supplied to a gas delivery port 34 that corresponds to a collision side airbag member (side airbag member 14, for example) so as to inflate and deploy the airbag member on the collision side. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a side collision airbag apparatus.

  In recent years, the demand for airbags has increased, and the number of airbags per vehicle has increased. In order to operate the airbag module, one inflator is generally required for one airbag. Therefore, the number of inflators increases as the number of airbags to be mounted increases. The number of channels of the airbag ECU for controlling the increase also increases.

On the other hand, the control means controls the switching means based on the information from the detection means so that the supply destination of the gas generated from the inflator (gas generation means) is switched to something in the plurality of airbags. It is disclosed (see Patent Document 1).
JP 2007-91083 A

  However, it is considered difficult to suppress the manufacturing cost if the detection means and the control means are used to control the switching means as in the conventional example described above.

  In view of the above facts, the present invention has an object to enable gas channel switching with a simple and inexpensive structure when selectively supplying gas from an inflator to a plurality of airbag bags. And

  According to the first aspect of the present invention, an inflator capable of injecting a gas at the time of a side collision and a pair of both in the vehicle width direction are arranged in a folded state and can be inflated and deployed by receiving the supply of the gas from the inflator. A plurality of airbag bags, a gas introduction part connected to the inflator, and a gas discharge part connected to the plurality of airbag bags, respectively. And a switching valve configured to be operated by the pressure of the gas that has flowed in and to supply the gas to the gas discharge port corresponding to the airbag bag body on the collision side.

  In the side airbag device according to the first aspect, when the inflator is activated during a side collision, the gas ejected from the inflator flows into the switching valve through the gas introduction part. At this time, the switching valve is operated by the inertia at the time of a side collision and the pressure of the gas, so that gas is supplied to the gas discharge port corresponding to the airbag bag body on the collision side, and the airbag bag body on the collision side is Inflates and expands. As described above, in the side collision airbag device according to claim 1, the gas flow path is configured with a simple and inexpensive structure in which the switching valve is operated by the inertia at the time of a side collision and the pressure of the gas flowing into the switching valve. Switching can be performed.

  According to a second aspect of the present invention, in the side collision airbag apparatus according to the first aspect, the switching valve communicates with a cylinder disposed along a vehicle width direction and the gas introduction portion in the vehicle width direction of the cylinder. An inlet port that opens at the center of the cylinder, an outlet port that opens at both ends of the cylinder and that communicates with the gas discharge portion, and is disposed in the cylinder, and is configured to be used for inertia in a side collision and the cylinder from the inlet port. Due to the pressure of the gas flowing into the cylinder, the cylinder moves relatively in the vehicle width direction, closes the outlet port corresponding to the airbag bag body on the anti-collision side, and corresponds to the airbag bag body on the collision side. And a valve body that opens the outlet port.

  In the side impact airbag device according to the second aspect, when the inflator is activated at the time of a side collision, the gas ejected from the inflator flows into the cylinder of the switching valve from the inlet port communicating with the gas introduction part. At this time, the valve element disposed in the cylinder moves relative to the inside of the cylinder in the vehicle width direction due to the inertia at the time of a side collision and the pressure of the gas flowing into the cylinder from the inlet port. The outlet port corresponding to the airbag bag body is closed and the outlet port corresponding to the collision-side airbag bag body is opened. Thereby, gas is supplied to the airbag body on the collision side, and the airbag body is inflated and deployed. Thus, in the side impact airbag device according to claim 2, the gas from the inflator is selected for a plurality of airbag bags by a simple and inexpensive configuration in which the valve body relatively moves in the cylinder. Can be supplied automatically.

  According to a third aspect of the present invention, in the side impact airbag apparatus according to the first or second aspect, the side airbag disposed as the airbag bag body corresponding to both side portions of the vehicle seat. It is characterized by having a bag.

  In the side-impact airbag device according to claim 3, since the airbag bag body has side airbag bag bodies arranged corresponding to both side portions of the vehicle seat, at the time of a side collision Since the side airbag bag body on the collision side is inflated and deployed, the body part of the occupant can be mainly protected.

  According to a fourth aspect of the present invention, in the side collision airbag apparatus according to any one of the first to third aspects, the airbag bag body includes a curtain shield airbag bag body. .

  In the side-impact airbag device according to claim 4, since the curtain shield airbag bag body is provided as the airbag bag body, the curtain shield airbag bag body on the collision side is inflated and deployed at the time of a side collision. Thus, the head of the occupant can be mainly protected.

  As described above, according to the side airbag device according to claim 1 of the present invention, it is simple and inexpensive to selectively supply the gas from the inflator to the plurality of airbag bags. An excellent effect is obtained that the gas flow path can be switched with a simple structure.

  According to the side airbag device according to claim 2, the gas from the inflator is selectively supplied to the plurality of airbag bags by a simple and inexpensive configuration in which the valve body relatively moves in the cylinder. An excellent effect that it can be supplied is obtained.

  According to the side impact airbag device of the third aspect, an excellent effect is obtained that the body portion of the occupant can be mainly protected during a side collision.

  According to the side collision airbag device of the fourth aspect, an excellent effect is obtained that the head of the occupant can be mainly protected during a side collision.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2, a side-impact airbag device 10 according to the present embodiment includes an inflator 12, side airbag bag bodies 14 and 16, which are an example of a plurality of airbag bag bodies, and a switching valve 18. Have.

  The inflator 12 is gas generating means capable of ejecting gas at the time of a side collision. The inflator 12 is configured to operate in response to an operating current from an air bag ECU (not shown), and the air bag ECU determines the side collision based on a signal from a side collision sensor (not shown). Is configured to flow an operating current.

  As the inflator 12, a gas generating agent enclosed type or a high pressure gas enclosed type may be used. A configuration example of the inflator 12 will be briefly described. In the case of the former type, a bottomed cylindrical housing having a plurality of gas ejection ports formed on the peripheral surface, and a combustion that is disposed in the housing and burned. A gas generating agent that generates gas, a filter that removes debris after combustion of the gas generating agent, and an electric ignition ignition device that is attached to an end of the opening side of the housing and burns the gas generating agent. It is configured to include.

  On the other hand, in the case of the latter type, a bottomed cylindrical housing, a pressure partition disposed in the housing, and argon, helium, etc. sealed in a chamber defined by the pressure partition and the housing. A mixed gas, a moving member that is movably disposed in the vicinity of the pressure partition, and that breaks the pressure partition by moving; an electric ignition type ignition device that is attached to an end of the housing on the opening side and moves the moving member; , Including.

  The inflator 12 is disposed along the height direction of the seat back 22, for example, at the center in the vehicle width direction within the seat back 22 of the front seat 20 that is an example of a vehicle seat. The inflator 12 is connected to the gas introduction part 26 of the switching valve 18 via the gas supply pipe 24. The installation location of the inflator 12 is not limited to the seat back 22 and may be, for example, the lower portion of the seat cushion 28.

  The side airbag bags 14 and 16 are arranged in a pair and in a folded state on both side portions of the seat back 22 of the front seat 20 as an example of both sides in the vehicle width direction, and supply gas from the inflator 12. In response, it is configured to be inflatable and deployable to the side of a passenger (not shown). Specifically, the side airbag bag body 14 is disposed on the side portion of the seat back 22 on the right side of the vehicle, and is connected to the gas discharge portion 34 on the left side of the vehicle of the switching valve 18 using the gas supply pipe 30. Has been. Further, the side airbag bag body 16 is disposed on the vehicle left side portion of the seat back 22, and is connected to the vehicle right side gas discharge portion 36 of the switching valve 18 using a gas supply pipe 32.

  In order to connect the side airbag bag body 14 on the right side of the vehicle and the gas discharge part 34 on the left side of the vehicle in the switching valve 18, the gas supply pipe 30 is curved in a substantially J shape. Similarly, in order to connect the side airbag bag body 16 on the left side of the vehicle and the gas discharge part 36 on the right side of the vehicle in the switching valve 18, the gas supply pipe 32 is also curved in a substantially J shape.

  A part of the seat back 22 is configured to be cleaved by the inflation pressure of the side airbag bag bodies 14, 16, and the side airbag bag bodies 14, 16 pass through an opening formed by the cleavage of the occupant. It is designed to expand to the side.

  1 and 2, the switching valve 18 has a gas introduction part 26 connected to the inflator 12, and gas discharge parts 34 and 36 connected to the side airbag bag bodies 14 and 16, respectively. It is configured to operate according to the inertia of the time and the pressure of the gas flowing in from the gas introducing portion 26, and to supply the gas to the gas discharge port corresponding to the side airbag bag body on the collision side. Specifically, as shown in FIG. 3, the switching valve 18 includes a cylinder 38 arranged along the vehicle width direction, an inlet port 40, outlet ports 44 and 46, and a valve body 42. is doing.

  The inlet port 40 communicates with the gas introduction portion 26 and opens at the center of the cylinder 38 in the vehicle width direction. The outlet ports 44 and 46 open to both ends of the cylinder 38 and communicate with the gas discharge portions 34 and 36, respectively. Specifically, the outlet port 44 is formed at the vehicle left end portion of the cylinder 38 and communicates with the gas discharge portion 34 corresponding to the side airbag bag body 14 (FIG. 1) on the vehicle right side. The outlet port 46 is formed at the vehicle right end of the cylinder 38 and communicates with the gas discharge portion 36 corresponding to the side airbag bag body 16 (FIG. 1) on the vehicle left side.

  The inner diameters of the outlet ports 44 and 46 are set smaller than the inner diameter of the general portion 38 </ b> A of the cylinder 38. Between the general portion 38A and the outlet port 44 on the left side of the vehicle is a valve seat portion 38B formed in a tapered shape, and between the general portion 38A and the outlet port 46 on the right side of the vehicle is also tapered. The valve seat portion 38C is formed.

  The valve body 42 is disposed in the cylinder 38 and relatively moves in the vehicle width direction in the cylinder 38 due to the inertia at the time of a side collision and the pressure of the gas flowing into the cylinder 38 from the inlet port 40, and is on the anti-collision side. The outlet port corresponding to the side airbag bag body is closed, and the outlet port corresponding to the collision side airbag bag body is opened. The valve body 42 is a metal sphere, for example, an iron ball, and has a diameter smaller than the inner diameter of the general portion 38 </ b> A in the cylinder 38 and larger than the inner diameter of the outlet ports 44 and 46.

  As a result, the valve body 42 can move in the vehicle width direction in the cylinder 38 due to the inertia of the valve body 42 at the time of a side collision and the pressure of the gas flowing into the cylinder 38 from the inlet port 40. ing. The outlet port 46 can be closed when the valve body 42 comes into close contact with the valve seat portion 38C, and the outlet port 44 can be closed when the valve body 42 comes into close contact with the valve seat portion 38B. ing.

  In order to prevent the valve body 42 from moving in the cylinder 38 during normal use, the valve body 42 is locked at the center in the vehicle width direction of the cylinder 38 by locking means (not shown). Yes. As the locking means, the caulking of the cylinder 38, fixing with an adhesive or the like can be considered. Since this locked state needs to be released at the time of a side collision, the degree of locking is set in consideration of the mass of the valve body 42 and the pressure of the gas from the inflator 12.

  In addition, in order to improve the obstruction | occlusion property with respect to the outlet ports 44 and 46, you may coat | cover the surface of the valve body 42, or valve seat part 38B, 38C with rubber | gum.

  As shown in FIG. 4, in this embodiment, an inflator 12, side airbag bags 14 and 16, and a switching valve 18 are also provided in a rear seat 50 that is an example of a vehicle seat. The rear seat 50 is configured, for example, as a two-seat or three-seater, and the seat back 52 is also configured to be wider correspondingly. The side airbag bags 14 and 16 are accommodated in a pair and folded state on both side portions of the seat back 52. The connection state of the inflator 12, the switching valve 18 and the side airbag bags 14 and 16 is the same as that of the front seat 20 (FIG. 1), but the vehicle width direction dimension of the seat back 52 is the seat of the front seat 20. Since it is larger than the back 22 (FIG. 1), the lengths of the gas supply pipes 30 and 32 are respectively longer in the vehicle width direction. In the example shown in FIG. 4, the inflator 12 is disposed along the vehicle width direction, but the direction of the inflator 12 is not limited to this. Further, the installation location of the inflator 12 is not limited to the seat back 52, and may be a lower portion of the seat cushion 48, for example.

  In the present embodiment, as shown in FIG. 5, in addition to the side airbag bags 14 and 16 provided in the front seat 20 and the rear seat 50, respectively, as the airbag bag body, a curtain shield airbag bag body is used. 54 and 56 are provided. The curtain shield airbag bags 54 and 56 are disposed in a folded state along the roof side rail 64 between, for example, the A pillar 58, the B pillar 60, and the C pillar 62, and gas from the inflator 12 at the time of a side collision. , For example, up to the vicinity of the belt line 66 can be deployed in a curtain shape downward in the vehicle interior.

  The curtain shield airbag body 54 is disposed along the roof side rail 64 on the right side of the vehicle, and the gas supply pipe 30 is connected to the rear end. The curtain shield airbag body 56 is disposed along the roof side rail 64 on the left side of the vehicle, and the gas supply pipe 32 is connected to the rear end. The connection state between the gas supply pipes 30 and 32 and the switching valve 18 is the same as that in the case of the front seat 20 (FIG. 1), but the inflator 12 and the switching valve 18 are provided on the floor (not shown) at the rear of the vehicle, for example. The gas supply pipes 30 and 32 extend to the vicinity of a rear wheel house (not shown), and further extend upward along the C pillar 62 from there to the rear of the curtain shield airbag bags 54 and 56. Connected to each end.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. In FIG. 10A, in the side collision airbag apparatus 10 according to the present embodiment, for example, when a side collision occurs in the direction of arrow L with respect to the right side of the vehicle, the vehicle is momentarily pushed to the left side of the vehicle. 6, the cylinder 38 of the switching valve 18 also moves to the left side of the vehicle (in the direction of arrow L). At this time, the valve body 42 in the switching valve 18 tends to stay at the position before the collision due to its inertia. Thereby, the valve body 42 moves relatively to the right side of the vehicle (in the direction of arrow R) in the cylinder 38. In a normal state, when the valve body 42 is locked to the cylinder 38 by a locking means (not shown), the locked state is released by the inertia of the valve body 42 in a side collision.

  On the other hand, in the airbag apparatus 10 for side collision, when the airbag ECU determines that a side collision has occurred based on a signal from the side collision sensor, an ignition current flows from the airbag ECU to the inflator 12. The inflator 12 is activated by the ignition current and ejects a large amount of gas. The gas ejected from the inflator 12 flows into the cylinder 38 from the inlet port 40 of the gas introduction part 26 through the gas supply pipe 24 in the direction of arrow A. In order for the valve body 42 to move smoothly in the cylinder 38, the gas flow is performed after the valve body 42 starts to move relative to the cylinder 38.

  As shown in FIG. 7, the valve body 42 moves relatively in the cylinder 38 due to the inertia of the valve body 42 at the time of a side collision and the pressure of the gas from the inflator 12, so that the valve seat on the right side of the vehicle Adhere to the part 38C. As a result, the outlet port 46 on the right side of the vehicle is closed and the outlet port 44 on the left side of the vehicle is opened, so that the gas that has flowed into the cylinder 38 from the inlet port 40 flows from the outlet port 44 to the gas discharge unit 34. It flows in the direction of arrow B. The gas flowing from the outlet port 44 on the left side of the vehicle to the gas discharge unit 34 is supplied to the side airbag bag body 14 (FIG. 1) on the right side of the vehicle in the front seat 20 located on the collision side through the gas supply pipe 30. Is done.

  Thereby, as shown in FIG. 10A, the side airbag bag body 14 on the right side of the vehicle in the front seat 20 is inflated and deployed to the side of the occupant (not shown). At this time, the side airbag bag body 14 (FIG. 4) on the right side of the vehicle in the rear seat 50 is also inflated and deployed in the same manner. The trunk part of the occupant can be mainly protected by the deployed side airbag bag body 14. Further, the curtain shield airbag body 54 (FIG. 5) on the right side of the vehicle is also deployed in a curtain shape downward in the vehicle compartment, for example, to the vicinity of the belt line 66. The head of the occupant can be mainly protected by the deployed curtain shield airbag bag body 54.

  In FIG. 7, the valve element 42 that has been in close contact with the valve seat 38 </ b> C is pressed against the valve seat 38 </ b> C by the pressure p of the gas while the gas is supplied from the inflator 12, so that the outlet port 46 is blocked. State is maintained. Even when the supply of gas from the inflator 12 is completed, the bag is deformed by the deformation of the side airbag bag body 14 while the passenger is restrained by the side airbag bag body 14 (FIG. 10A). Since the internal pressure increases, the pressure p continues to act on the valve body 42. As a result, the closed state of the outlet port 46 is maintained. The same applies to the switching valve 18 shown in FIGS. In the switching valve 18 shown in FIG. 5, after the supply of gas from the inflator 12 is finished, the pressure p continues to act on the valve body 42 due to the increase in the bag internal pressure in the curtain shield airbag body 54.

  Here, although the pressure of the gas acting on the valve body 42 is “p”, this is not a variable representing the magnitude of the pressure, but a general pressure that presses the valve body 42 against the valve seat portions 38B and 38C. It's just a sign. Therefore, the pressure p of the gas supplied from the inflator 12 and the pressure p due to the increase in the internal pressure of the side airbag bag body 14 and the curtain shield airbag bag body 54 are not limited to the same. The same applies to the following description.

  Next, an operation when a side collision occurs on the left side of the vehicle will be described. 10B, in the side collision airbag apparatus 10 according to the present embodiment, when a side collision occurs in the direction of arrow R with respect to the left side of the vehicle, the vehicle is momentarily pushed to the right side of the vehicle. Thus, as shown in FIG. 8, the cylinder 38 of the switching valve 18 also moves to the right side of the vehicle (in the direction of arrow R). At this time, the valve body 42 in the switching valve 18 tends to stay at the position before the collision due to its inertia. As a result, the valve body 42 moves relatively to the left side of the vehicle (in the direction of arrow L) in the cylinder 38. The operation of the inflator 12 and the inflow of gas into the cylinder 38 are the same as in the case of a side collision with the right side portion of the vehicle.

  As shown in FIG. 9, the valve body 42 moves relatively in the cylinder 38 due to the inertia of the valve body 42 at the time of a side collision and the pressure of the gas from the inflator 12, and thereby the valve seat on the left side of the vehicle. It adheres to the part 38B. As a result, the outlet port 44 on the left side of the vehicle is closed and the outlet port 46 on the left side of the vehicle is opened, so that the gas flowing into the cylinder 38 from the inlet port 40 flows into the gas discharge unit 36 from the outlet port 44. It flows in the direction of arrow C. The gas flowing from the outlet port 46 on the right side of the vehicle to the gas discharge portion 36 is supplied through the gas supply pipe 32 to the side airbag bag body 16 (FIG. 1) on the left side of the vehicle in the front seat 20 located on the collision side. Is done.

  Accordingly, as shown in FIG. 10B, the side airbag bag body 16 on the left side of the vehicle in the front seat 20 is inflated and deployed to the side of the occupant (not shown). At this time, the side airbag bag body 16 (FIG. 4) on the left side of the vehicle in the rear seat 50 is also inflated and deployed in the same manner. Further, the curtain shield airbag body 56 (FIG. 5) on the left side of the vehicle is similarly deployed in a curtain shape downward in the vehicle compartment, for example, to the vicinity of the belt line 66.

  In FIG. 9, the valve element 42 that has been in close contact with the valve seat 38 </ b> B is pressed against the valve seat 38 </ b> B by the pressure p of the gas while the gas is supplied from the inflator 12, so that the outlet port 44 is blocked. State is maintained. Even when the supply of gas from the inflator 12 is completed, the bag is deformed by the deformation of the side airbag bag body 16 while the occupant is restrained by the side airbag bag body 16 (FIG. 10B). Since the internal pressure increases, the pressure p continues to act on the valve body 42. As a result, the closed state of the outlet port 44 is maintained. The same applies to the switching valve 18 shown in FIGS. In the switching valve 18 shown in FIG. 5, after the supply of gas from the inflator 12 is finished, the pressure p continues to act on the valve body 42 due to the increase of the bag internal pressure in the curtain shield airbag body 56.

  As described above, in the side airbag apparatus 10, the valve body 42 relatively moves in the switching valve 18 due to the inertia at the time of a side collision and the pressure of the gas flowing into the cylinder 38 of the switching valve 18. With a simple and inexpensive structure, the gas flow path can be switched, and the gas from the inflator 12 can be selectively supplied to the plurality of airbag bags.

(Modification of switching valve)
The shape of the valve body 42 in the switching valve 18 is not limited to a sphere, and may be a shape as shown in FIGS. 11 to 13, for example. In the example shown in FIG. 11, the valve body 72 is formed in an oval shape.

  In the example shown in FIG. 12, a conical portion 82 </ b> B is provided at both ends of a cylindrical portion 82 </ b> A that extends in the vehicle width direction of the valve body 82. By setting the apex angle of the conical portion 82B to be smaller than the taper angle of the valve seat portions 38B and 38C, the closing performance of the outlet port 44 when the valve body 82 comes into close contact with the valve seat portion 38B, and the valve seat portion. It is possible to enhance the closing property of the outlet port 46 when the valve body 82 is brought into close contact with 38C.

  In the example shown in FIG. 13, a truncated cone part 92B is provided at both ends of a cylindrical part 92A extending in the vehicle width direction of the valve body 92. This valve body 92 is obtained by changing the tip shape of both end portions in the vehicle width direction of the valve body 82 shown in FIG. Accordingly, by setting the apex angle of the truncated cone portion 92B to be smaller than the taper angle of the valve seat portions 38B and 38C, the closing performance of the outlet port 44 when the valve body 92 is in close contact with the valve seat portion 38B, and It is possible to enhance the closing performance of the outlet port 46 when the valve body 92 is in close contact with the valve seat portion 38C.

  In the above configuration, the side airbag bag bodies 14 and 16 are disposed corresponding to both side portions of the front seat 20 and the rear seat 50 (vehicle seat). In the case where the side airbag bag bodies 14 and 16 are provided in the seat backs 22 and 52, and in the case where the side airbag bag bodies 14 and 16 are provided in, for example, a door trim (not shown) that is an interior material of the vehicle body. Both are included.

  In the above embodiment, the side airbag bag bodies 14 and 16 and the curtain shield airbag bag bodies 54 and 56 are provided as the airbag bag bodies. However, only the side airbag bag bodies 14 and 16 are provided. Alternatively, only the curtain shield airbag bags 54 and 56 may be provided. Air bag bodies other than these may be provided in pairs on both sides in the vehicle width direction.

It is a perspective view which shows the side airbag apparatus provided in the front seat. It is a top view which shows the airbag apparatus for side collision provided in the front seat. It is an expanded sectional view showing the composition of a change-over valve typically. It is a perspective view which shows the airbag apparatus for side collision provided in the backseat. It is a top view of the airbag apparatus for side collision which has a curtain shield airbag bag body. FIG. 4 is an enlarged cross-sectional view showing a state in which a side collision with the right side portion of the vehicle occurs and the valve body relatively moves in the right direction of the vehicle due to its inertia and the pressure of gas flowing into the cylinder. It is an expanded sectional view showing the state where the outlet port on the right side of the vehicle is closed by the valve body, and the gas flowing into the cylinder from the inlet port flows from the outlet port on the left side of the vehicle. FIG. 4 is an enlarged cross-sectional view showing a state in which a side collision with the left side portion of the vehicle occurs and the valve body relatively moves in the left direction of the vehicle due to its inertia and the pressure of gas flowing into the cylinder. It is an expanded sectional view showing the state where the outlet port on the left side of the vehicle is closed by the valve body, and the gas flowing into the cylinder from the inlet port flows from the outlet port on the right side of the vehicle. (A) It is a top view which shows the state which the side airbag bag body of the vehicle right side of a front seat and a rear seat and the curtain shield airbag bag body of the vehicle right side are each expand | deployed at the time of the side collision with respect to the vehicle right side part. (B) It is a top view which shows the state which the side airbag bag body of the vehicle left side of a front seat and a rear seat and the curtain shield airbag bag body of the vehicle left side are each expand | deployed at the time of the side collision with respect to the vehicle left side part. It is an expanded sectional view which shows the modification of a switching valve. It is an expanded sectional view which shows the modification of a switching valve. It is an expanded sectional view which shows the modification of a switching valve.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Side impact airbag apparatus 12 Inflator 14 Side airbag bag body (airbag bag body)
16 Side airbag bag body (airbag bag body)
18 Switching valve 20 Front seat (vehicle seat)
26 Gas introduction part 34 Gas discharge part 36 Gas discharge part 38 Cylinder 40 Inlet port 42 Valve body 44 Outlet port 46 Outlet port 50 Rear seat (vehicle seat)
54 Curtain Shield Airbag Body (Airbag Body)
56 Curtain shield airbag body (airbag body)
72 Valve body 82 Valve body 92 Valve body

Claims (4)

An inflator capable of injecting gas at the time of a side collision,
A plurality of airbag bags disposed in pairs on both sides in the vehicle width direction and in a folded state and capable of being inflated and deployed by receiving the supply of the gas from the inflator;
It has a gas introduction part connected to the inflator and a gas discharge part connected to each of the plurality of airbag bags, and is operated by inertia at the time of a side collision and the pressure of the gas flowing in from the gas introduction part A switching valve configured to supply the gas to the gas discharge port corresponding to the airbag body on the collision side;
A side-impact airbag device characterized by comprising: The switching valve is
A cylinder arranged along the vehicle width direction;
An inlet port that opens in the center of the cylinder in the vehicle width direction through the gas inlet;
Outlet ports respectively opening at both ends of the cylinder and communicating with the gas discharge part,
The air bag on the anti-collision side is disposed in the cylinder and relatively moves in the vehicle width direction due to the inertia at the time of a side collision and the pressure of the gas flowing into the cylinder from the inlet port. A valve body for closing the outlet port corresponding to the body and opening the outlet port corresponding to the airbag bag body on the collision side;
The side airbag apparatus according to claim 1, wherein the airbag apparatus is configured to have a side wall.   The side airbag device according to claim 1 or 2, wherein the airbag bag body has side airbag bags disposed corresponding to both side portions of the vehicle seat. .   The side airbag apparatus according to any one of claims 1 to 3, wherein a curtain shield airbag body is provided as the airbag body.

Images