JP2017061282A - Side air bag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control a deployment state of an air bag to be a state depending on a collision speed.SOLUTION: A side air bag device individually operates a first inflator 6 and a second inflator 7 having different gas ejection property depending on a collision speed of a lateral collision based on a body type of an occupant 8 and adjusts an ejection state of a gas ejected into the air bag 5 depending on the collision speed of the lateral collision based on the body type of the occupant 8.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a side airbag device in which an airbag is deployed on the side of a vehicle seat.

  There is known a side airbag device that ejects gas from an inflator when a side collision is detected by a vehicle and deploys and inflates an airbag between an occupant and a side body member (for example, a side door). Yes. The occupant seated on the seat is protected by the side airbag device. The gap between the occupant and the side door varies depending on the occupant's physique, but the size (width) of the airbag is determined in advance, so depending on the occupant's physique, the pressure in the airbag during deployment may change, May affect the protection performance (restraint performance).

  For this reason, the airbag apparatus which can adjust the thickness of expansion | deployment of an airbag according to a passenger | crew's physique conventionally is proposed (for example, patent document 1). Patent Document 1 includes a main bag and a sub bag. When protecting an occupant with a large physique, only the main bag is deployed, and when protecting an occupant with a small physique, It is a technology that deploys both sub bags. As a result, regardless of the occupant's physique, the pressure in the airbag deployed in the gap between the occupant and the side door is maintained substantially constant, and the occupant's protection performance (restraint performance) can be further improved.

  By the way, the gap between the occupant and the side door also changes depending on the speed of the side collision. In other words, the speed at which the side door enters the passenger compartment changes depending on the collision speed, so the gap between the occupant and the side door when the airbag is deployed differs depending on whether the collision speed is fast or slow even if the occupant's physique is the same. come. That is, the collision speed is also cited as a factor that affects the occupant protection performance.

  However, in the conventionally proposed technology, the collision speed is not taken into consideration, and there is room for improvement in improving the occupant protection performance.

Japanese Patent No. 4952321

  The present invention has been made in view of the above situation, and an object thereof is to provide a side airbag device capable of adjusting the deployment state of an airbag according to the speed of a side collision.

  In order to achieve the above object, a side airbag device according to a first aspect of the present invention provides a side airbag device in which an airbag is deployed between an occupant and a side body member at the time of a side collision from a side surface of the vehicle. A plurality of inflators that are operated at the time of a side collision to eject gas into the airbag, a collision speed detecting unit that detects a collision speed at the side collision, and a collision speed detected by the collision speed detecting unit Control means for controlling the gas ejection state of the plurality of inflators.

  In the present invention according to claim 1, since the control unit controls the gas ejection state of the plurality of inflators according to the collision speed detected by the collision speed detection unit, the gas ejection timing of the inflator according to the collision speed and The amount of ejection can be adjusted, and the deployment status of the airbag can be controlled in a state corresponding to the collision speed. For this reason, it becomes possible to optimally protect the occupant according to the speed of the side collision by adjusting the deployment state of the airbag.

  And the side airbag apparatus of the present invention according to claim 2 is the side airbag apparatus according to claim 1, wherein the control means is configured such that the collision speed detected by the collision speed detection means is a reference speed. Operates the plurality of inflators at the same time, and when the collision speed detected by the collision speed detection means is lower than the reference speed, sequentially operates the plurality of inflators, and the collision speed detection means When the detected collision speed is higher than the reference speed, any one of the plurality of inflators is operated.

  In the present invention according to claim 2, when the collision speed is the reference speed, the airbag is deployed in a prescribed state based on the gas ejection capability of the plurality of inflators by simultaneously operating the plurality of inflators. When the collision speed is slower than the reference speed, the airbags can be continuously deployed by continually injecting the gas from the inflators by operating the inflators sequentially. When the collision speed is higher than the reference speed, any of the plurality of inflators can be operated to set the internal pressure of the airbag to a desired characteristic.

  The reference speed is a speed in a preset speed range, a speed slower than the reference speed is a speed in a predetermined speed area lower than a speed in the preset speed range, and a speed faster than the reference speed is , A speed in a predetermined speed range exceeding a speed in a preset speed range.

  Moreover, the side airbag apparatus of the present invention according to claim 3 is the side airbag apparatus according to claim 2, wherein the plurality of inflators respectively eject gas to different positions in the vertical direction of the airbag. It is characterized by.

  According to the third aspect of the present invention, the airbag deployment state can be adjusted in the vertical direction according to the collision speed. Specifically, according to the collision speed, it is possible to preferentially deploy airbag portions corresponding to necessary portions such as a shoulder, a chest, an abdomen, and a waist.

  According to a fourth aspect of the present invention, there is provided the side airbag device according to the third aspect, wherein the plurality of inflators are configured such that a gas ejection amount per unit time is set to a predetermined amount. 1 inflator and a second inflator in which the amount of gas ejection per unit time is set smaller than that of the first inflator, and the first inflator ejects gas above the airbag, The second inflator ejects gas below the airbag.

  In the present invention according to claim 4, by operating the first inflator to eject gas, a predetermined amount of gas is ejected in a predetermined time (in a short time), and the airbag is deployed from above. By operating the inflator to eject gas, a predetermined amount of gas can be ejected in a longer time than the predetermined time, and the airbag can be deployed from below. As an airbag, the area where gas is ejected can be divided into upper and lower parts, and the gas can be distributed in each other area.

  The side airbag device of the present invention according to claim 5 is the side airbag device according to claim 4, further comprising physique detection means for detecting the physique of the occupant, wherein the control means is the physique detection means. When the physique is detected to be large, and the collision speed is slower than the reference speed, the first inflator and the second inflator are operated in this order, and the collision speed is the reference speed. In the case of a higher speed, when either the first inflator or the second inflator is operated and the physique detecting means detects that the physique is small, the collision speed is the reference speed. In the case of a slower speed, the second inflator and the first inflator are operated in this order, and the collision speed is higher than the reference speed. Is characterized in that actuating either one of said second inflator or the first inflator.

  In this invention which concerns on Claim 5, since the action | operation of a 1st inflator and a 2nd inflator is controlled based on a passenger | crew's physique, an airbag can be expand | deployed according to a passenger | crew's physique. In addition, when controlling the operation | movement of an inflator based on a passenger | crew's physique, it can apply to the invention which concerns on Claims 1-3.

  When the physique is detected to be large and the collision speed is slower than the reference speed, the first inflator and second inflator are operated in this order, When the airbag is deployed from the shoulder (for example, the part corresponding to the shoulder) to maintain the deployed state, and the collision speed is faster than the reference speed, either the first inflator or the second inflator (for example, The first inflator is actuated to instantly deploy the airbag from the upper part (for example, the part corresponding to the shoulder part) for a large occupant with relatively high resistance.

  When the physique is detected to be small, if the collision speed is slower than the reference speed, the second inflator and the first inflator are actuated in this order. (For example, a part corresponding to the abdomen and waist) The airbag is deployed to maintain the deployed state, and when the collision speed is higher than the reference speed, either the second inflator or the first inflator ( For example, the second inflator is operated, and an airbag is instantaneously deployed from a lower part (for example, a part corresponding to the abdomen and waist) to a small occupant having relatively low resistance.

  Therefore, by adjusting the operation timing of the first and second inflators, the airbag pressure and deployment behavior considering the occupant's physique and collision speed can be obtained, further improving the occupant's protection performance (restraint performance) Can be made.

  The side airbag device of the present invention can adjust the deployment state of the airbag according to the speed of the side collision.

It is a side view of the sheet | seat provided with the side airbag apparatus which concerns on one Example of this invention. It is a front view of the sheet | seat provided with the side airbag apparatus which concerns on one Example of this invention. It is explanatory drawing of an inflator. It is a block block diagram of a side airbag apparatus. It is a flowchart of operation | movement of a side airbag apparatus. It is a graph showing the time-dependent change of the amount of gas ejection in control 1 (impact speed is a standard). It is explanatory drawing of the state of an airbag in case a passenger | crew is large. It is explanatory drawing of the state of an airbag in case a passenger | crew is small. It is a graph showing the time-dependent change of the gas ejection amount in Control 2 (occupant is large and the collision speed is low). It is explanatory drawing of the state of the airbag in control 2. FIG. It is a graph showing the time-dependent change of the gas ejection amount in Control 3 (occupant is large and the collision speed is high). It is explanatory drawing of the state of the airbag in control 3. FIG. It is a graph showing the time-dependent change of the gas ejection amount in the control 4 (occupant is small and the collision speed is low). It is explanatory drawing of the state of the airbag in control 4. FIG. It is a graph showing the time-dependent change of the gas ejection amount in Control 5 (occupant is small and the collision speed is high). It is explanatory drawing of the state of the airbag in control 5. FIG.

A configuration of a side airbag device according to an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a side view of a seat (airbag deployment) including a side airbag device according to an embodiment of the present invention, FIG. 2 is a front view of the seat (airbag deployment), and FIG. A concept for explaining the specific structure of the inflator, FIG. 3 (b) is a graph showing the output performance of the inflator (time-dependent change in gas ejection amount), and FIG. 4 is a block for explaining the control system of the side airbag device, etc. FIG. 5 shows a flow chart for determining the control pattern of the side airbag device.

  As shown in FIGS. 1 and 2, a side airbag device 4 is provided on the side door 3 side (side body member side) of the seat back 2 of the vehicle seat 1. The side airbag device 4 includes a first inflator 6 that ejects gas upward in the airbag 5 and a second inflator 7 that ejects gas downward in the airbag 5. That is, the first inflator 6 and the second inflator 7 constitute a plurality of inflators that inject gas into the airbag 5.

  Note that the airbag 5 includes an upper chamber from which gas is ejected from the first inflator 6 and a lower chamber from which gas is ejected from the second inflator 7, and a predetermined amount is provided in the partition between the upper chamber and the lower chamber. It is also possible to adopt a configuration in which a distribution means for distributing the gas is provided.

  By operating the first inflator 6 and the second inflator 7 (the first inflator 6 or the second inflator 7), the airbag 5 is deployed between the side surface of the occupant 8 and the side door 3. Thereby, even if a load acts on the side door 3 due to a side collision and the side door 3 is deformed, the occupant 8 is protected (restrained) by the airbag 5.

  As shown to Fig.3 (a), the 1st inflator 6 is distribute | arranged to the upper part of the airbag 5, and the gas jet nozzle 6a is formed upwards. The second inflator 7 is disposed at the lower part of the airbag 5, and a gas outlet 7 a is formed below. When a side collision occurs, the first inflator 6 and the second inflator 7 receive an ignition signal from the control means 11 (ECU) and receive the ignition signal to receive the first inflator 6 and the second inflator. 7 operates individually.

  In the first inflator 6, the gas ejection amount per unit time is set to a predetermined amount, and the ejection is completed at a short time t <b> 1 as indicated by a one-dot chain line in FIG. For this reason, a lot of gas is ejected in a short time (by time t1) (the maximum ejection amount is large).

  The second inflator 7 is set so that the amount of gas ejection per unit time is smaller than that of the first inflator 6, and as shown by a two-dot chain line in FIG. 3B, at a time t2 later than the time t1. The eruption is completed. For this reason, the gas ejection is continued, and a small amount of gas continues to be ejected until the relatively long time (time t2) (the maximum ejection amount is small).

  In the side airbag device 4 described above, the operation of the first inflator 6 and the second inflator 7 is individually controlled based on the physique of the occupant 8 and the collision speed of the side collision, and the deployment state of the airbag 5 is adjusted. Is done.

The block configuration of the control means 11 will be described based on FIG.
Information on the physique detection means 12 for detecting the physique of the occupant 8 is input to the control means 11, and the control means 11 determines whether the occupant 8 is a large occupant or a small occupant. For example, a capacitance sensor and a weight sensor in the seat are applied to the physique detection means 12, and the physique is determined based on the weight of the occupant 8.

  Further, information on the collision detection means 13 and the collision speed detection means 14 is input to the control means 11, and the control means 11 determines the occurrence of a side collision and the collision speed in the side collision. As the collision detection means 13, for example, an acceleration sensor, a pressure sensor in a door, or the like is applied. As the collision speed detection means 14, for example, an acceleration sensor detection integrated twice, a radar sensor, an in-vehicle camera, or the like is applied.

  In the control means 11, the collision speed in the side collision is a reference speed that is a speed in a preset speed range, a slow speed (low speed) in a predetermined speed area that is lower than the reference speed, or exceeds the reference speed. It is determined whether the predetermined region has a high speed (high speed).

  Then, from the control means 11, the first inflator 6, based on information on the physique of the occupant 8 (large or small) and information on the collision speed of the side collision (reference speed, low speed, high speed), and The operation signal (ignition signal) is individually sent to the second inflator 7. Thereby, based on the physique of the occupant 8 and the collision speed of the side collision, the operations of the first inflator 6 and the second inflator 7 are individually controlled, and the deployment state of the airbag 5 is adjusted.

Based on FIG. 5, the state of the control for determining the operation pattern of the first inflator 6 and the second inflator 7 will be described.
If the physique is determined in step S1, and it is determined in step S1 that the occupant 8 has a large physique, it is determined in step S2 whether or not the collision speed of the side collision is a reference speed. When it is determined in step S2 that the collision speed is the reference speed, a large occupant 8 is seated, and it is determined that the collision speed is a side collision of the reference speed (large and the collision speed is the reference speed). Control 1 (large pattern, reference speed) is performed.

  If it is determined in step S2 that the collision speed is not the reference speed, it is determined in step S4 whether or not the collision speed is low. If it is determined in step S4 that the collision speed is low, a large occupant 8 is seated and it is determined that the collision speed is a low-speed side collision (large and the collision speed is low), and control 2 is performed in step S5. (Large, low speed) is implemented.

  After it is determined in step S2 that the collision speed is not the reference speed, if it is determined in step S4 that the collision speed is not low, the collision speed is high, so the large passenger 8 is seated and the collision speed is It is determined that the collision is a high-speed side collision (large and high collision speed), and control 3 (large and high speed) is performed in step S6.

  On the other hand, if it is determined in step S1 that the physique of the occupant 8 is small, it is determined in step S7 whether or not the speed of the collision speed is a reference speed. If it is determined in step S7 that the speed is the reference speed, the small occupant 8 is seated, and it is determined that the collision speed is a side collision with the reference speed (small and the collision speed is the reference speed), and the control 1 is performed in step S8. (Small, reference speed) is implemented.

  That is, when the collision speed of the side collision is the reference speed, the control 1 is performed regardless of the physique of the occupant 8 (specific control will be described later).

  If it is determined in step S7 that the collision speed is not the reference speed, it is determined in step S9 whether or not the collision speed is low. If it is determined in step S9 that the collision speed is low, the small occupant 8 is seated, and it is determined that the collision speed is a low-speed side collision (small and the collision speed is low), and control is performed in step S10. 4 (small, low speed) is performed.

  After it is determined in step S7 that the collision speed is not the reference speed, if it is determined in step S9 that the collision speed is not low, the collision speed is high, so the small passenger 8 is seated and the collision speed is It is determined that the collision is a high-speed side collision (small and high collision speed), and control 5 (small and high speed) is performed in step S11.

  Control 1 (large pattern, reference speed: small pattern, reference speed), control 2 (large pattern, low speed), control 3 (large pattern, high speed), control 4 (small pattern, low speed), control based on FIGS. 5 (small size, high speed) will be specifically described.

  FIG. 6 is a graph showing the change over time of the gas ejection amount in the control 1 (the collision speed is a reference), FIG. 7A is an airbag deployment situation for a large occupant 8a, and FIG. Changes in the internal pressure of the airbag over time in the case of the large occupant 8a, FIG. 8 (a) shows the airbag deployment situation in the case of the small occupant 8b, and FIG. 8 (b) shows the case of the small occupant 8b. The change with time of the internal pressure of the airbag is shown.

  FIG. 9 is a graph showing the change over time of the gas ejection amount in the control 2 (large pattern, low speed), FIG. 10 (a) is the deployment state of the airbag with respect to the occupant 8a, and FIG. 10 (b) is the interior of the airbag. The change in pressure over time is shown. FIG. 11 is a graph showing the change over time of the gas ejection amount in the control 3 (large pattern, high speed), FIG. 12 (a) is the airbag deployment state with respect to the occupant 8a, and FIG. 12 (b) is the interior of the airbag. The change in pressure over time is shown.

  FIG. 13 is a graph showing the change over time of the gas ejection amount in the control 4 (small size, low speed), FIG. 14 (a) is the deployment state of the airbag to the occupant 8b, and FIG. 14 (b) is the interior of the airbag. The change in pressure over time is shown. FIG. 15 is a graph showing the change over time of the gas ejection amount in the control 5 (small size, high speed), FIG. 16 (a) is the deployment state of the airbag with respect to the passenger 8b, and FIG. 16 (b) is the interior of the airbag. The change in pressure over time is shown.

The control 1 (large pattern, small pattern, reference speed) will be described.
As shown in FIG. 6, the first inflator 6 and the second inflator 7 are simultaneously ignited, and the gas ejection amount of the first inflator 6 indicated by a one-dot chain line and the gas of the second inflator 7 indicated by a two-dot chain line. Combined with the ejection amount, the gas ejection amount indicated by the solid line is obtained.

  In this case, as shown in FIG. 7A, the airbag 5 is deployed between the large occupant 8a and the side door 3 with a small gap h1. As shown in FIG. 7 (b), in the small gap h1, the volume of the airbag 5 is reduced and the internal pressure is increased. However, the internal pressure of the airbag 5 is the pressure of a large occupant (indicated by a thick dotted line in the figure). (Not shown).

  As shown in FIG. 8A, the airbag 5 is deployed between the small occupant 8b and the side door 3 with a large gap H1. For this reason, as shown in FIG. 8B, the volume of the airbag 5 is increased due to the large gap H1, the internal pressure is reduced, and the internal pressure of the airbag 5 is a pressure that is resistant to a small passenger (in the figure). The pressure is lower than that (shown by a thin dotted line).

  Therefore, when the collision speed is the reference speed, the first inflator 6 and the second inflator 7 are simultaneously operated, and either the large occupant 8a having a relatively high resistance or the small occupant 8b having a relatively low resistance is selected. In contrast, the airbag 5 can be deployed at a pressure within a tolerance range. That is, the airbag can be deployed in a prescribed state based on the gas ejection capability of the first inflator 6 and the second inflator 7 (a plurality of inflators).

Control 2 (large pattern, low speed) will be described.
As shown in FIG. 9, the first inflator 6 is ignited, and the second inflator 7 is ignited at a timing when the gas ejection amount reaches a peak (actuated sequentially). As a result, the gas ejection amount of the first inflator 6 indicated by the alternate long and short dash line and the gas ejection amount of the second inflator 7 indicated by the alternate long and two short dashes line are continued, and the time for gas ejection is ensured as indicated by the solid line. can do.

  In this case, as shown in FIG. 10A, the airbag 5 is deployed between the large occupant 8a and the side door 3 with a gap H2 larger than that at the reference speed. As shown in FIG. 10B, in the state of the gap H2 that is larger than that at the reference speed, the volume of the airbag 5 increases and the internal pressure decreases. The time during which the internal pressure of the airbag 5 is maintained is ensured by the amount the internal pressure is reduced.

  Accordingly, when the large occupant 8a is seated and the collision speed is low, the first inflator 6 and the second inflator 7 are actuated in this order, and the pressure corresponding to the upper part of the large occupant 8a having relatively high resistance is applied from the upper part. Thus, the airbag 5 can be deployed with a sufficient holding time. That is, when the physique of the occupant 8 is detected to be large, if the collision speed is slower than the reference speed, the first inflator 6 and the second inflator 7 are operated in this order, and the resistance is relatively high. The airbag 5 can be deployed from the upper part (for example, the part corresponding to the shoulder) with respect to the large occupant 8a to maintain the deployed state.

Control 3 (large pattern, high speed) will be described.
As shown in FIG. 11, only the first inflator 6 is ignited. Thereby, the gas ejection amount per unit time is set to a predetermined amount, and a large amount of gas is ejected in a short time (the maximum ejection amount is large). The gas ejection amount indicated by the one-dot chain line is instantaneously generated from the first inflator 6. Gas is ejected.

  In this case, as shown in FIG. 12A, the airbag 5 is deployed between the large occupant 8a and the side door 3 with a gap h3 smaller than that at the reference speed. As shown in FIG. 12B, the volume of the airbag 5 is reduced and the internal pressure is increased in a state where the gap h3 is smaller than that at the reference speed. As the internal pressure increases, the airbag 5 is instantly deployed at a high internal pressure.

  Therefore, when the large occupant 8a is seated and the collision speed is high, only the first inflator 6 is activated, and the airbag 5 at the site corresponding to the shoulder portion with a narrow gap can be instantly deployed. That is, when the collision speed is higher than the reference speed, the first inflator 6 (either the first inflator 6 or the second inflator 7) having a large maximum ejection amount is operated to have a relatively high durability. The air bag 5 can be instantaneously deployed with respect to the occupant 8a in a state in which the amount of gas ejection is large from an upper portion where the gap is narrow (for example, a portion corresponding to the shoulder portion).

The control 4 (small size, low speed) will be described.
As shown in FIG. 13, the second inflator 7 is ignited, and the first inflator 6 is ignited with a delay at the timing when the gas ejection amount decreases from the peak (actuates sequentially). Thereby, the gas ejection amount of the second inflator 7 indicated by the two-dot chain line and the gas ejection amount of the first inflator 6 indicated by the one-dot chain line are continued, and the time for gas ejection is ensured as indicated by the solid line. can do.

  In this case, as shown in FIG. 14A, the airbag 5 is deployed between the small occupant 8b and the side door 3 with a gap H4 larger than that at the reference speed. As shown in FIG. 14B, in the state of the gap H4 that is larger than that at the reference speed, the volume of the airbag 5 increases and the internal pressure decreases. The time during which the internal pressure of the airbag 5 is maintained is ensured by the amount the internal pressure is reduced. At this time, the initial internal pressure is low, and the internal pressure in the latter half is slightly high (pressure lower than the pressure of the small passenger's tolerance).

  Accordingly, when the small occupant 8b is seated and the collision speed is low, the second inflator 7 and the first inflator 6 are actuated in this order, and pressure is applied from the portion corresponding to the lower portion to the small occupant 8b having relatively low resistance. Thus, the airbag 5 can be deployed with a sufficient holding time. That is, when it is detected that the occupant's physique is small, if the collision speed is slower than the reference speed, the second inflator 7 and the first inflator 6 are operated in this order, and the small resistance is relatively low. The airbag 5 can be deployed from the lower part (for example, a part corresponding to the abdomen and waist) to the occupant 8b to maintain the deployed state.

The control 5 (small size, high speed) will be described.
As shown in FIG. 15, only the second inflator 7 is ignited. As a result, the amount of gas ejected per unit time is set to be smaller than that of the first inflator 6, and a small amount of gas continues to be ejected for a relatively long period of time (the maximum amount of ejection is small) from the second inflator 7. Gas is ejected at the gas ejection amount indicated by the chain line.

  In this case, as shown in FIG. 16A, the airbag 5 is deployed between the small occupant 8b and the side door 3 with a gap h5 smaller than that at the reference speed. As shown in FIG. 16B, in the state of the gap h5 that is smaller than that at the reference speed, the volume of the airbag 5 is reduced and the internal pressure is increased. Since the gas is ejected from the second inflator 7 whose internal pressure is increased but the maximum ejection amount is small, the airbag 5 is deployed with an internal pressure lower than the resistance of a small occupant.

  Therefore, when the small occupant 8b is seated and the collision speed is high, only the second inflator 7 with a small maximum ejection amount is activated, and the airbag 5 corresponding to the lower part having a relatively low resistance is first deployed. Can be made. In other words, when the collision speed is higher than the reference speed, the second inflator 7 (either the second inflator 7 or the first inflator 6) is operated, and the small occupant 8b having relatively low resistance is operated. The airbag 5 is deployed from the lower part (for example, the part corresponding to the abdomen and the waist).

  In the side airbag device 4 described above, the first inflator 6 and the second inflator 7 having different gas ejection characteristics are individually operated according to the collision speed of the side collision based on the occupant's physique. The gas ejection state of the airbag 5 is adjusted according to the collision speed of the side collision. As a result, the deployment state of the airbag 5 can be controlled to a state corresponding to the occupant's physique and the collision speed, and the occupant's protection performance can be further improved.

  In the above-described embodiment, an example in which the occupant's physique is detected has been described. However, regardless of the occupant's physique, a plurality of inflators can be controlled according to the collision speed of the side collision. . Moreover, although the example which applied the 1st inflator 6 and the 2nd inflator 7 from which the gas ejection characteristics differ as a some inflator was mentioned and demonstrated in the Example mentioned above, the gas ejection characteristics of the 1st inflator 6 and the 2nd inflator 7 were demonstrated. Can be the same. A plurality of inflators having three or more inflators can be used.

  The present invention can be used in the industrial field of a side airbag device in which an airbag is deployed on the side of a vehicle seat.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat back 3 Side door 4 Side airbag apparatus 5 Air bag 6 1st inflator 7 2nd inflator 8 Crew 11 Control means 12 Body size detection means 13 Collision detection means 14 Collision speed detection means

Claims (5)

In the side airbag device in which the airbag is deployed between the occupant and the side body member at the time of a side collision from the side of the vehicle,
A plurality of inflators that are activated at the time of the side collision and eject gas into the airbag;
A collision speed detecting means for detecting a collision speed at the time of the side collision;
A side airbag device comprising: control means for controlling the gas ejection state of the plurality of inflators according to the collision speed detected by the collision speed detection means. In the side airbag device according to claim 1,
The control means includes
When the collision speed detected by the collision speed detection means is a reference speed, the plurality of inflators are operated simultaneously,
When the collision speed detected by the collision speed detection means is a speed slower than the reference speed, the plurality of inflators are sequentially operated,
When the collision speed detected by the collision speed detection means is faster than the reference speed, any one of the plurality of inflators is operated. In the side airbag device according to claim 2,
The plurality of inflators respectively eject gas to different positions in the vertical direction of the airbag. In the side airbag device according to claim 3,
The plurality of inflators are:
A first inflator in which a gas ejection amount per unit time is set to a predetermined amount;
The second inflator is configured such that the gas ejection amount per unit time is set to be smaller than that of the first inflator.
The first inflator ejects gas above the airbag,
The second inflator causes a gas to be ejected below the airbag. In the side airbag device according to claim 4,
Physique detection means for detecting the physique of the occupant,
The control means includes
When the physique detection means detects that the physique is large, if the collision speed is slower than the reference speed, the first inflator and the second inflator are operated in this order, and the collision speed When the speed is faster than the reference speed, either the first inflator or the second inflator is operated,
When the physique detection means detects that the physique is small, if the collision speed is slower than the reference speed, the second inflator and the first inflator are operated in this order, and the collision speed When the speed is higher than the reference speed, either the second inflator or the first inflator is operated.

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