WO2005118355A1

WO2005118355A1 - Air bag internal pressure control method and air bag device

Info

Publication number: WO2005118355A1
Application number: PCT/JP2005/010212
Authority: WO
Inventors: Koji Korechika
Original assignee: Autoliv Development Ab
Priority date: 2004-06-01
Filing date: 2005-05-27
Publication date: 2005-12-15

Abstract

A gas flow rate changing device (1) of a vent hole includes: a drive device (B1) for changing the gas flow rate passing through the vent hole (21); an occupant body build inspection device (110) for detecting the body build of an occupant; a storage device (120) for temporarily storing the occupant body build data outputted from the occupant body build detection device (110); a spread volume detection device (130) for detecting at least the air bag spread volume or a timer (150) for measuring the time elapse from the moment when an air bag spread start instruction signal is inputted; a calculation device (100) for calculating a control signal of the drive means (B1) by using the data in the storage device (120) and the output signal from the spread volume detection device (130) or the timer (150) which is decided according to the data in the storage device (120); and an output device (160) for outputting the control signal to the drive device (B1).

Description

明

Method of controlling internal pressure of air bag and air bag device

The present invention relates to an air bag internal pressure control method and an air bag apparatus provided with an air bag internal pressure control device. Background art

As a method for controlling the internal pressure of the air bag of the air bag device, for example, US Pat.

As disclosed in Japanese Patent Publication No. 4 7 2 7 6, an opening hole formed in the side surface of one of the inflators constituting the airbag device is formed by a knurl at some point during the deployment of the airbag. Techniques for opening and closing are known. In addition, a two-stage inflator uses a seat position sensor that detects the occupant's seating position, a seat position sensor that detects the difference, an occupant weight sensor, and an ECU (electronic control unit) that processes the information detected by the sensor. There are known airbag devices that perform internal pressure control HP and airpack poly-um control ¾J. However, the conventional method of controlling the internal pressure of an airbag simply opens the pulp and lowers the internal pressure when the internal pressure of the airbag exceeds a certain pressure, and there is a difference in occupants. It was difficult to maintain the airbag internal pressure, and as a result, due to trade-offs, the situation had to be set with a medium aim. In addition, the conventional air pad and dog device also use a two-stage inflator, which has been a factor of cost increase. Disclosure of the invention The present invention has been made in view of the problems of the conventional airbag internal pressure control method and the airbag device described above, and provides an internal pressure control method that responds quickly to an internal pressure fluctuation of the airbag. In addition, a low-cost airbag device capable of changing the hardness of the airbag by appropriately controlling the internal pressure by monitoring the situation in which the occupant suddenly enters the airbag is provided. For this purpose, the airbag internal pressure control method of the present invention is an airbag internal pressure control method for controlling the internal pressure of the airbag at the time of deployment by changing the gas flow rate passing through the vent hole. At the time of deployment of the so-called self airbag, at least the deployment volume of the tiff self-bag or the time elapsed from the start of the deployment of the air bag is monitored, and the ttrt own air bag is determined in advance according to at least the occupant data. Changing the gas flow rate passing through the vent hole according to the crew data, either at a time equal to or greater than the determined deployment volume or after a lapse of a predetermined elapsed time according to the occupant data. Another aspect of the present invention is a method of controlling the internal pressure of an airbag, comprising: controlling the internal pressure of the airbag during deployment to a gas flow rate passing through a vent hole. A method for controlling the internal pressure of an air bag which is changed and controlled, wherein occupant physique data is acquired in advance, and when the air bag is deployed, the internal pressure of the air bag is monitored, and at least the deployed volume of the air bag or the air bag deployment. Monitor any of the elapsed time from the start, tii? Even if the airbag is longer than the predetermined deployment volume according to the occupant data or ΙίίΙthe predetermined time according to the occupant data If it is a later error and the internal pressure of the tiff's own air bag reaches or exceeds a predetermined internal pressure according to the occupant data, at least one of the occupant data or the predetermined one is used. In order to change the flow rate of gas passing through the vent hole according to the conditions, it is assumed that the size of the paste is changed. And still another method of controlling the internal pressure of the air bag of the present invention is to urge an opening / closing member capable of closing the vent hole in a direction in which the vent hole is closed by a proper spring force. By absorbing a part of the airbag in the biasing direction and making the spring force variable, the movement of the opening / closing member with respect to the same deployed state of the airbag is changed to change the gas passage area of the vent hole. It is defined that the flow rate of the gas passing through the vent hole is changed. An airbag device according to the present invention is an airbag device having a gas passage flow rate variable device for a vent hole, wherein the gas passage flow rate variable device for the vent hole is for varying the gas flow rate passing through the vent hole. A drive unit, an occupant that detects the occupant # ^ An occupant physique data input device that detects occupant data or an occupant physique data input device that inputs occupant data, and an output of the occupant 5¾ member detection device A storage device for temporarily storing occupant data input to the device, and a predetermined amount of time elapsed from when an expansion volume detection device for detecting at least the expansion volume of the airbag or an airbag expansion start instruction signal is input. Any of a timer for measuring time, data of the storage device, and at least the developed volume detection determined based on the data of the storage device An arithmetic unit for calculating a control signal of the driving device using an output signal of the timer or the timer, and an output device for outputting the control signal to the driving device. This is referred to as glue. Further, another airbag device of the present invention is an airbag device having a gas passage flow rate variable device of a vent hole, wherein the gas passage flow rate variable device of the vent hole varies a gas flow rate passing through the vent hole. A layer concealing device for detecting the occupant's physique, an occupant # ¾ detecting device or an occupant data input device for inputting occupant data by the occupant itself, and an output from the occupant! ^ Detecting device or the occupant. ί «A storage device that temporarily stores the occupant data input to the data input device, An internal pressure detection device that detects the internal pressure of the airbag, and a deployment volume detection device that detects at least the deployment volume of the disgusting airbag or a timer that measures a predetermined elapsed time from when the airbag deployment start instruction signal is input An operation in which a control signal of the driving device is calculated using any one of the data of the self-storage device, at least an output signal of the developed volume detection device or the tin self-timer, and an output signal of the internal pressure detection device. And an output device for outputting the control signal to the driving device. The driving device includes an opening / closing member capable of closing the vent hole, a spring biased in the opening / closing member in a direction to close the vent hole, and a resistance force generated in a biasing direction of the spring. It is preferable to further include a variable resistance force device provided in connection with the spring. Further, the driving device includes: a cylinder having the vent hole formed therein; a piston reciprocating in the cylinder to open and close the vent hole; a spring biased by the biston in a direction to close the vent hole; It is preferable that the apparatus further comprises a variable resistance generator that generates a resistance in the biasing direction of the spring and is provided in connection with the biston. The cylinder includes an opening / closing hole communicating with the airbag, and a main body having a vent hole formed therein. The piston is attached to the biston, and the head is pressed against the opening / closing hole by a spring force. And a rod portion on which a rack is formed. The variable resistance device includes a pin with a damper, and the knitting rack and the pinion with a damper are combined with each other. An arm rotatably supported to a mating posture and a hook formed on the toothed arm, and rotatably supported so as to be detached from the footer by using the control signal as a trigger. A trigger arm; and a spiral spring for urging the arm in a direction in which the pinion with a damper engages with the rack. Further, still another method of controlling the internal pressure of an airbag according to the present invention is to control the internal pressure of the airbag at the time of deployment by changing the gas flow rate passing through the vent hole. A method in which the time elapsed from the time of the collision accident is monitored by a timer, and the flow rate of the gas passing through the vent hole is changed after a predetermined delay time has elapsed from the start of the deployment of the ftilS air package. What you did is called glue. Alternatively, the occupant physique data may be obtained in advance, and after the predetermined delay time elapses, the gas flow rate passing through the vent hole may be changed according to the occupant win data. Further, still another method of controlling the internal pressure of an airbag according to the present invention is a method of controlling the internal pressure of an airbag at the time of deployment by changing the flow rate of gas passing through a vent hole. A gas that blocks the internal pressure detection port of the gas flow rate variable device (Plih the gas flow from the start of deployment of the airbag until the internal pressure reaches a peak state from the start of deployment of the airbag, and when the internal pressure reaches the peak state, It is characterized in that the air flow is broken and the gas flow rate passing through the vent hole is changed.Further, another air bag device of the present invention has a variable gas flow rate device of a vent horn. The airbag device is a device for varying the flow rate of gas passing through the vent hole, and a drive device for varying the flow rate of gas passing through the vent hole, and a motor that monitors the time elapsed since the collision accident. A timer for measuring a predetermined delay time from the start of the deployment of the air bag; a computing device for calculating a control signal of the driving device using an output signal of the timer; and a driving device for controlling the driving signal. At this age, the variable gas passage flow rate device at the β venthole further detects the occupant's 赚. Crew # ^ The crew data input device that the crew data is input by the crew detection device or the crew itself, and the crew female data output from the cabin crew thigh detection device or the IB crew data input device are temporarily stored. The lift self-calculating device may calculate the control signal of the self-drive device using the data of the storage device and the output signal of the timer. In addition, the drive device includes a cylinder having the vent hole formed therein, a piston reciprocating in the cylinder to open and close the vent hole, and a spring biased by the biston in a direction to close the vent hole. An elastic film that closes the open / close hole of the cylinder communicating with the airbag; and an elastic film disposed in the open / close hole so as to break the elastic film when the internal pressure of the airbag reaches a peak state. Or a driving device comprising: a cylinder having the vent hole formed therein; and a piston reciprocating in the cylinder to open and close the vent hole. a spring urged in a direction to close the vent hole by the tin biston, and a lock provided in connection with the biston to lock the reciprocation of the biston. And click device, said locking device solutions ^ Ru Akuchiyueta said control signal as triggers, it is preferable that a Norishiki a provided. Further, the cylinder includes an opening and closing hole communicating with the airbag, and a main body having a vent hole formed therein. The piston is inserted into the piston and the head is pressed against the opening and closing hole by a spring force. And a rod portion having a rack formed thereon. The buckling device includes a lock pin, and shifts from a position where the ttifS rack and the self-portion pierced mating to a matching position. A lock arm rotatably supported by a lock, a trigger arm hung on a hook formed on the lock arm, and rotatably supported so as to be disengaged from the hook cover by a actuator; A spiral spring for urging the mouthpiece arm in a direction in which the mouthpiece does not engage with the leakage rack. The self-cylinder comprises an opening / closing hole communicating with the airbag, and a main body having a vent hole formed therein. The piston is attached with the spring, and the opening / closing hole is formed by the spring force. The locking device comprises a head portion to be pressed, a mouth portion formed with a first rack and a second rack, and the locking device has a lock pinion, and the first rack and the mouth pinion engage with each other. A mouth arm pivotally supported to be rotatable from a posture to a posture in which it does not engage, and a pinion with a damper, and the second rack and the piston with a damper do not engage with each other; A second arm rotatably supported by the first arm and a first hook formed on the lock arm, and the second arm rotatably supported by the tfff actuator so as to be detachable from the first hook. 1 bird A gar arm, a disgusting second arm, a second trigger arm hung on a second hook formed and rotatably supported by a return actuator so as to be disengaged from the second hook, and the lock pin A first spiral spring for urging the lock arm in a direction in which the lock arm does not engage with the first rack; and a second spiral arm for urging the second arm in a direction in which the damped pinion engages with the second rack. And a second spiral spring. Generally, an airbag has a first pressure peak that is maximum in all processes within a few 10 msec from the start of deployment, and a second pressure peak that is lower than the first peak until about 100 msec thereafter. Pressure peak (see Figures 1 and 2). Since the method for controlling the air pressure of the airbag of the present invention is as described above, the vent horn is closed at the first pressure peak. In other words, since the volume of the airbag itself is small during the inflation in the early stage of deployment, even if the internal pressure is high, there is no problem here, but at the second peak, deployment is almost completed and the airbag approaches its maximum. In order to do this, the pressure increasing force here is not appropriate, and damage to the occupants will occur. The internal pressure control method for an airbag according to the present invention can optimize the second pressure peak. Further, since the airbag device of the present invention is configured as described above, Depending on the crew and the small crew, the mode of change of the gas flow rate through the vent hole can be selected. In other words, the airbag internal pressure and hardness can be selected according to the occupant's physique.

Further, according to the other airbag device of the present invention, the inflator ignites due to a collision accident and gas is ejected, the internal pressure of the airbag rises rapidly, and the internal pressure of the airbag reaches a peak ¾1 ". Even in the case of hase-1, the vent hole is closed by an elastic membrane, minimizing gas outflow, resulting in faster deployment of the occupant restraint airbag or small inflation. There is an advantage that it is possible to adopt a printer.

Fig. 1 is a graph showing the change in the internal pressure of the airbag, which explains the method of controlling the internal pressure of the airbag of the present invention. The occupant is an average adult male. FIG. 3 (A) is a cross-sectional view of the variable gas passage flow rate device according to the embodiment of the present invention, and FIG. 3 (B) is a perspective view of the driving device. 4 is a cross-sectional view for explaining the opening / closing operation of the vent hole of the variable gas passage flow rate device shown in FIG. 3 (when the occupant is a small adult woman). FIG. 5 is a cross-sectional view of the vent hole of the variable gas passage flow rate device shown in FIG. Fig. 6 is a cross-sectional view illustrating the opening / closing operation (occupant; ^ for a small adult woman: ^). Fig. 6 shows the opening / closing operation of the vent hole of the gas flow rate variable device in Fig. 3 (^ FIG. 7 is a cross-sectional view illustrating the gas flow rate variable device of FIG. FIG. 8 is a cross-sectional view illustrating the opening and closing operation of the towel (^ an average male occupant). FIG. 8 is a conceptual diagram illustrating the relationship between the spring and the damper of the variable gas passage flow rate device in FIG. FIG. 10 is a flow chart of a method for controlling air pressure of an airbag according to another embodiment of the present invention. FIG. 10 is a cross-sectional view of a gas flow variable device according to another embodiment of the present invention. 1 is a cross-sectional view of a driving device according to another embodiment of the present invention, FIG. 12 shows the relationship between the bullet and the plate of the driving device in FIG. 11, and FIG. (B) is a cross-sectional view when the internal pressure reaches a peak state, and (C) is a schematic perspective view. BEST MODE FOR CARRYING OUT THE INVENTION

Embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a graph showing an internal pressure change of an airbag (an occupant force S is a small adult woman:! ^) Illustrating an internal pressure control of the airbag according to the present invention, and FIG. FIG. 3 (A) is a cross-sectional view of a variable gas passage flow rate device of a vent hole according to an embodiment of the present invention.

(B) is a perspective view of the driving device, FIGS. 4 to 7 are cross-sectional views for explaining the opening / closing operation of the vent hole of the gas passage flow rate variable device in FIG. 3, and FIG. 8 is FIG. FIG. 3 is a conceptual diagram illustrating a relationship between a spring and a damper of a gas flow rate variable device in a vent hole. First, referring to FIGS. 1 and 2, a method of controlling the internal pressure of the air bag, which controls the internal pressure of the air bag during deployment by changing the gas flow rate passing through the vent hole, will be described in detail. Figure 1 is a graph showing the internal pressure change of an airbag (the occupant is a small adult woman ^ [AF 5% (Adult Female 5% = small adult woman with a height of about 15 Ocm)]). . In the figure, the bold line (Current) is the internal pressure change curve of the internal pressure not controlled by the conventional method, and the thin line (Improved) is the internal pressure change curve of the internal pressure controlled by the method of the present invention. is there. The horizontal axis is the airbag deployment start (TTF point) from the time of the collision accident, the S time (msec) that elapses from Phase-1 and Phase-2, and the vertical axis is the airbag internal pressure (KPa). According to the internal pressure control method of the present invention, in the initial stage of the deployment of the airbag, it is the first priority to increase the internal pressure and to increase the occupant restraining force of the air bag, so that the gas flow rate passing through the vent hole is zero, that is, Venthoe Keep closed. Then, when deploying the airbag, at least the deployment volume of the airbag or the deployment of the airbag (TTF) Monitor the power elapsed time. Immediately after the collision, at the initial stage of deployment (0-15 msec), the internal pressure reaches a peak of about 12 O KPa, then drops rapidly (Phase-1), and then starts to increase again around 40 msec (Phase-1) -2). The airbag force is at least a predetermined deployment volume according to the tfrf own occupant data obtained in advance ^ ^ or the t! If own occupant data (this is AF 5%). In any case after the elapsed time (this ^^ is about 45 msec), the gas flow rate passing through the vent hole is changed according to the occupant 赚 data (AF 5%). . Specifically, the venthorn opens, and the gas in the bag exits from the venthorn. The gas flow rate passing through the vent hole is controlled so that the vent hole closes when the internal pressure of the airbag decreases. Then, the vent hole repeats the above opening and closing operations. As a result, as shown in Fig. 1, the internal pressure increases in the initial stage of deployment, the occupant restraining force increases, then the internal pressure S decreases once, and then starts increasing again. By changing the gas flow passing through the vent hole at the point, the size of the small adult female of about 150 cm in height was adjusted according to the occupant's physique: Airpak internal pressure (less than 20 KPa), that is, relatively The hardness of the airbag can be as strong as that of a straw. In the above control method, a predetermined point at which the control of the gas flow rate passing through the vent hole is started (a point described as Activate MVC) is at least when the airbag is deployed, at least when the airbag is deployed or when the airbag is deployed. Either the time elapsed since the start of deployment is monitored, and the airbag is at least the deployment volume or the occupant physique determined in advance in accordance with at least the previously acquired occupant physique data (AF 5%). Any time after a predetermined elapsed time (approximately 45 msec) has elapsed according to the data (AF 5%), it is determined according to the occupant data (AF5%). Here, the predetermined point of “myself” (point described as “Activate AAVC”) monitors the internal pressure of the airbag when the airbag is deployed, and at least the deployment volume of the airbag or the progress from the start of deployment of the airbag. Monitor any of the time, and said Air Pag 1 at least your own crew! ^ Either above the predetermined deployment volume according to the data (AF5 ° / ₀ ) or after the predetermined elapsed time (approximately 45 msec) according to the occupant data (AF5%). And if the internal pressure of the airbag reaches or exceeds a predetermined internal pressure (where ^ is about 15 KPa) according to the occupant physique data (AF5%), at least the occupant data (AF5%) or the It may be determined according to any of the predetermined internal pressures (about 15 KPa). The vent hole may be one that changes the cross-sectional area perpendicular to the gas flow direction. Specifically, for example, the vent hole formed in the cylinder is opened and closed by an opening / closing member such as a Viston II opening / closing plate by a specific spring force urged in a direction to close the vent hole. It is more preferable that the opening area is changed. Next, a description will be given of AM 50% (Adult Male 50%, an average adult male with a height of 175 cm and a weight of about 75 kg) whose average occupant shown in Fig. 2 is an adult male. As in Fig. 1, the bold line (Current) is the curve of the internal pressure change without controlling the internal pressure by the conventional method, and the thin line (Improved) is the curve of the internal pressure change by controlling the internal pressure by the method of the present invention. It is a dagger curve. The horizontal axis is the airbag deployment start (TTF point) from the time of the collision accident, the elapsed time (msec) after passing Phase-1 and Phase-2, and the vertical axis is the internal pressure of the air bag (KPa). As in the case of Fig. 1, in the initial stage of airbag deployment, the internal pressure is increased and the airbag is opened. Since the first priority is to increase the occupant restraint of the vehicle, the gas flow through the vent horn is zero, that is, the vent hoe is kept closed. When the airbag is deployed, at least the elapsed time of the deployment of the airbag or the airbag deployment start (TTF) force is monitored. Immediately after the collision, in the initial stage of deployment (0-15 msec), the internal pressure reaches a peak of about 12 OKPa, then drops sharply (Phase-1), and then starts to rise around 30 msec (Phase-1) -2). The airbag has a deployment volume equal to or greater than a predetermined deployment volume based on at least the previously acquired occupant physique data, or a predetermined progress based on unpleasant occupant data (AM is 50%). The gas flow rate passing through the vent hole is changed in accordance with the occupant data (AM 50%) at any time after a lapse of time (this is about 60 msec). Specifically, the variable resistance generator (described later in detail), which generates a variable resistance force when the vent hole tries to open, turns ^ ft so that the occupant is more than an average adult male. A vent hole opens with an apparently strong panel constant, and gas in the airbag goes out of the vent vent. As the internal pressure of the airbag decreases, the apparently stronger panel constant controls the gas flow rate passing through the venthole so that the venthole closes at a higher internal pressure than at 50% AM. As a result, as shown in FIG. 2, the internal pressure increases in the initial stage of deployment, the occupant restraining force improves, and then the internal pressure decreases, and the internal pressure starts to increase again. By changing the gas flow passing through the vent hole at the point, the average occupant, who is about 17.5 cm tall and weighs about 75 kg, was able to meet the occupant's margin: The internal pressure of the bag (more than 3 OKPa), that is, the hardness of a relatively hard airbag can be achieved. In the above control method, the predetermined point (the point described as Activate MVC) at which the control of the gas flow rate passing through the vent chamber is started is at least the deployment volume of the airbag or the deployment of the airbag when the airbag is deployed. Elapsed time from the start is monitored, and the airbag is at least a predetermined deployment volume or the occupant physique according to the occupant physique data (AM 50%) acquired at least in advance. Any time after a predetermined elapsed time (approximately 60 msec) has elapsed according to the data (AM 50%), it will be determined according to the occupant data (AM 50%). Here, the predetermined point of the cafeteria (the point described as Activate MVC) is to monitor the internal pressure of the airbag when the airbag is deployed, and at least from the deployment volume of the airbag or the start of deployment of the airbag. The airbag force is at least equal to or greater than a predetermined deployment volume according to the occupant data (AM 50%) or according to the occupant physique data (AM 50%). The predetermined time (approximately 60 msec) has elapsed, and the internal pressure of the airbag is determined in accordance with the occupant data (AM 50%). (This is about 30KPa) When it reaches more than 30KPa, it should be determined according to at least the crew # ¾ data (AM50%) or the predetermined internal pressure (about 30KPa). Is also good. The gas flow rate passing through the vent hole urges the vent hole in a direction to close the vent hole by a spring force and absorbs a part of the spring force in the urging direction to change the spring force. Preferably, the vent hole formed in the cylinder is opened and closed by a piston, an opening / closing plate, or the like to change the shape. Next, an example of the configuration of an airbag device that realizes the above-described method of controlling the internal pressure of the airbag will be described in detail with reference to FIG. As shown in Fig. 3 (A), the air pack It has a variable gas passage flow rate device 1 for the hall. The gas flow rate variable device 1 includes a drive device for varying the gas flow rate passing through the vent hole. The driving device B, by reciprocating the piston 10, opens and closes a vent horn 21 formed in the cylinder 20 to reduce the internal pressure of an airbag (not shown) communicating with the cylinder 20. Control. The cylinder 20 includes an opening / closing hole 20a communicating with the airbag and a main body 20b in which the vent horn 21 is formed. An opening 22 is formed in the opening / closing hole 20a, and the airbag communicates with the opening 22. In addition, the vent hole 21 is formed at one or a plurality of locations on the side surface of the main body 20b, and is formed at a plurality of locations as shown in FIG. 3 (B). Preferably, they are arranged in a ring. The piston 10 includes a head portion 12 into which a spring 11 is inserted and pressed against an inner opening end of the opening / closing hole portion 20a by a spring force, and a rod portion 13. A rack 14 is formed in the opening 13. Then, in the main body portion 20b of the cylinder 20, a push 15 force S is fitted to the end opposite to the opening / closing hole # 20a. The ftilE spring 11 is fitted in the annular groove 15 a of the push 15, and the opening 13 is supported by the push 15 so as to be slidable in the cylinder axial direction. Therefore, the piston 10 is urged by the spring 11 in a direction in which the Fujimi vent hole 21 is closed. Further, a variable resistance device 30 that generates a resistance force in the biasing direction of the spring 11 is connected to the mouth portion 13 of the piston 10. Further, the apparatus for varying the amount of passage of aversion gas 1 includes an occupant physique detecting device 110 for detecting the occupant's physique or an occupant ί rare data input device 110 for inputting occupant physique data by the occupant itself. The occupant detection device 1 1 0 output or the occupant! ^ The occupant physique data input to the data input device 1 1 10, Storage device 120 in which the airbag is temporarily stored, a deployment detection device 130 for detecting the deployment volume of the airbag, and an internal pressure detection device 140 for detecting the internal pressure of the airbag when the airbag is deployed. And a timer 150 that measures a predetermined elapsed time from when the airbag deployment start signal is input. The occupant physique detecting device 110 is configured by, for example, a weight sensor installed in a seat, a distance detection by an ultrasonic sensor, and the like. The data input device 1 110 'for the cabin occupant is constituted by, for example, a ten-key input device installed beside the ¾fe seat. The deployment volume detection device 130 prepares, for example, a drawable string in the airbag, and detects the deployment volume of the airbag based on the amount of the drawn string. Also internal pressure detection device

The 140 is provided with, for example, a pressure sensor and a strain gauge.

Reference numeral 100 denotes an arithmetic unit, and at least the expansion detection device 130 or the M1 timer determined based on the data of the storage device 120 and the data of the storage device 120.

The control signal of the driving device B is calculated using any one of the output signals 150. The control signal is output to the driving device by an output device 160, and the output device 160 and the storage device 120 are arranged so as to be included in the arithmetic device 100. It is preferable to configure. Further, the arithmetic unit 100 is configured to output data of the self-storage device 120, at least an output signal of the expanded volume detecting device 130 or the timer 150, and a tiff internal pressure detecting device. A configuration may be used in which the control signal of the obscene driving device is calculated using the 140 output signal. The variable resistance source 30 includes a pion 31 with a damper, and a ttif rack 1 4 And an arm 3 2 rotatably supported from a position in which the pinion 31 with the damper does not fit to a position in which the pinion 3 has a fit, and a hook 3 2 a of the arm 3 2. A direction in which the trigger arm 33, which is pivotally supported so as to be disengaged from the selfie hook 3 2a with the self-control signal as the trigger, and the pinion 31 with return damper, engage with the rack 14 And a spiral spring 34 for urging the arm 32. As shown in FIG. 3 (a), the pinion with damper 31 is composed of a pinion part 31 a rotating with the rack 14 and a damper part fixed to the it arm 32. It consists of 32. The tins damper part 32b is constituted by a torque damper or a humid torque damper. Next, the opening / closing operation of the vent hole of the vent flow filter of FIG. 3 will be described with reference to the examples shown in FIGS. If the occupant is a small adult female, the variable resistance generator 30 does not operate as shown in FIGS. 4 and 5, and the vent hole 21 is opened and closed only by the panel constant of the spring 11. . The biston 10 is normally pressed against the opening / closing hole 20a of the cylinder 20 by the spring force of the spring 11 to close the vent hole 21. At this time, the rack 14 formed on the rod 13 of the biston 10 and the pinion 31 with the damper do not match (FIG. 4). Until the airbag is deployed, the control signal is calculated by the arithmetic unit 100, and the lock mechanism force (not shown) is reached until the point of the Activate AAV C (see FIG. 1) is reached. s Working vent hole does not open. There is a method of removing the pin for the lip mechanism. Next, after reaching the point, the lock mechanism is released, the lift piston 10 is pushed by its internal pressure, and the spring 11 is slid (to the right in the figure) while crushing the spring 11. Do. At the same time, the vent hole 21 is opened, and the gas in the airbag exits from the vent hole 21 (FIG. 5). When the internal pressure of the airbag decreases, the piston 10 is pressed against the self-opening / closing hole 20a by the spring force of the spring 11, and closes the self-vent hole 21. Then, the piston 10 reciprocates by repeating the above-described movement with the panel constant of the spring 11 (see FIG. 8 (a)). As shown in Figures 6 and 7, the average occupant of the adult male is controlled by the self-adjustable variable resistance device 30 and the tiff own pinion with damper 31 and the resistance and disgusting spring 1 1 The tin constant vent hole 21 is opened and closed by the None constant (appearance strong panel constant) that combines the panel constant. With the control signal from the arithmetic unit 100 as a trigger, the trigger arm 33 is turned and the hook 32 a of the arm 32 is released. At this time, since the arm 32 is urged by the spiral spring 34 in a direction in which the arm 32 engages with the rack 14, the hook 32 a is disengaged, and the pinion with damper 3 is released. 1 and the rack 14 interlock (Fig. 6). Until the airbag is deployed, a control signal is calculated by the arithmetic unit 100, and the lock mechanism force S (not shown) and the working vent hole are not shown until the point of the above-mentioned Activate AAV C (see FIG. 2) is reached. will not open. For this lock mechanism, there is a method of pulling out the pin. Next, after reaching the point, the lock mechanism is released, and the piston 10 is pushed by the internal pressure and slides (to the right in the drawing) while crushing the spring 11. At the same time, the vent hole 21 is opened, and the gas in the airbag flows out of the vent hole 21 (FIG. 7). When the internal pressure of the airbag decreases, the piston 10 is pressed against the opening / closing hole portion 20a by the spring force of the spring 11, and closes the vent hole 21. The piston 10 is provided with a pinion 3 1 with a damper. A reciprocating motion that repeats the above movements is performed by a panel constant (strong panel constant) that combines the panel constant of the device and the panel constant of the self-spring 11 (see Fig. 8 (b)). Next, another embodiment of the present invention will be described with reference to FIGS.

FIG. 9 is a flow chart of a method for controlling the internal pressure of an airbag according to another embodiment of the present invention, and FIG. 10 is a cross-sectional view of a gas passage flow varying device according to another embodiment of the present invention. As already shown in Figs. 1 and 2, the internal pressure at the time of deployment of the airbag changes with the passage of time, but the condition is that the inflator ignites and the airbag is deployed. — 1 and P hase — 2 that restrains the occupant with airbags. Ph as e_l, in which the airbag is ignited and deployed, is in a situation where gas is being released from the warehouse and the inflator, and the internal pressure of the airbag rises sharply. Then, as the bag becomes fully deployed, the internal pressure drops sharply. More specifically, in Phase-2, where an occupant is restrained by an airbag, the occupant crushes the airbag with its inertia against the airbag (in other words, the occupant is restrained by the airbag). Restrained). At that time, the internal pressure increases due to the occupant's inertial force, and some of the gas exits the vent hole.However, the degree of increase in the internal pressure in Phase-2 differs depending on the difference in the occupant's inertial force, that is, the occupant's physique . AAVC (Ad aptive Inner—Pressure Active Vent Control) that controls the internal gas pressure by flexibly changing the opening width of the vent horn hole according to the gas pressure when the air bag is deployed. The purpose of) is to optimize the internal pressure by opening and closing the vent holes with different panel constants according to the difference of the occupants. However, when the air bag is deployed! / ヽ, the point at which the AAVC starts ^ の because the gas is rapidly ejected from the inflator and the internal pressure is rising (Phase-l) In the case of ha se-2, the internal pressure (about 30 KPa in the case of Fig. 2) of Ac tivate AAV C exceeds the internal pressure in the case of ha se-1. Therefore, at the time of a collision (T = 0), the elapsed time of the force and the like is monitored by a timer, the ignition of the airbag is determined (T = T \), and the deployment of the MIS airbag starts (when the airbag is ignited). Yes, T = T ₂ in FIG. 9, TTF point in FIGS. 1 and 2, and after a lapse of a predetermined delay time (TT), the flow rate of gas passing through the vent hole is changed. , The delay time is ΔΤ = — ₄ — また_2. Also, in the case where the occupant data has been acquired in advance, and the occupant # ^ is determined to be large (# 2 Τ ₅ ), In this way, by combining the pions with dampers with the second rack (2nd e), the gas flow rate passing through the vent hole may be changed with a high panel constant. in _{[AM 50%], T 2} = 15ms ec, T 4 = 30ms ec, a _{T 6 = 60ms ec, Δ T} = T 4 - T 2 = 15 msec Specifically, after a delay of 15 ms ec from the start of deployment of the airbag, the lock device is cut off, the vent hole opens, and the gas in the airbag goes out of the vent hole. The gas flow rate passing through the vent hole is controlled so that the vent hole is closed, and the vent hole has a high panel constant when ^ the occupant is determined to be large, and a normal panel constant when ^ is not determined. The above-mentioned opening and closing operations are repeated with the panel constant, as long as the vent hole changes the cross-sectional area perpendicular to the gas flow direction. The spring is biased in a direction to close the hole, and a part of the spring force is absorbed in the biasing direction of the cover to make the spring force variable. Ri by the opening and closing by, it is preferable to varying I inhibit the opening area of the vent hole. Also, instead of monitoring the elapsed time from the time of the collision accident using a timer, the internal pressure from the start of deployment of the airbag until the internal pressure reaches a peak state ¾1 "by an elastic membrane that closes the internal pressure detection port of the gas flow rate variable device (P hase-1) The gas flow may be IfflJLh, and when the internal pressure reaches a peak state, the bullets may be broken and the gas flow rate passing through the vent hole may be changed. When the internal pressure reaches a peak state, the elastic film is deformed at the position where the elastic film is deformed, and the I »plate is awaited. Opens and the gas in the airbag exits through the venthole.The venthole closes when the internal pressure of the airbag drops.By repeating this opening and closing operation, the airbag passes through the venthole. The vent flow is repeated with the high spring constant when the occupant is determined to be large, and with the normal panel constant when the occupant is not large. As long as it changes the cross-sectional area perpendicular to the direction in which the gas flows, specifically, it urges the vent hole in a direction to close the vent hole by a mechanical spring force. The opening area of the vent hole is changed by opening and closing the vent hole formed in the cylinder with a Viston II open / close plate, for example, by absorbing the part in the negative biasing direction and making the spring force variable. Next, an example of the configuration of an air bag device that realizes the above-described method for controlling the internal pressure of the air bag will be described in detail with reference to FIGS. 10 to 12. As shown in FIG. Bag system. The gas flow rate passing through variator 2 0 1 having a gas flow rate passing through variator 2 0 1 of the vent hole is provided with a driving device B ₂ for varying the gas flow rate through the vent hole. Then, The driving device B ₂ opens and closes a vent hole 221 formed in the cylinder 220 by reciprocating motion of the piston 210, and an air passage communicating with the cylinder 220. To control the internal pressure of the housing (not shown). The cylinder 220 includes an opening / closing hole 220a communicating with the airbag and a main body 220b having the vent hole 222 formed therein. An opening hole 222 is formed in the opening / closing hole 220a, and the tiff airbag communicates with the opening hole 222. Further, one or more ftTt self-vent holes 22 1 are formed on the side surface of the main body 220 b. The piston 211 is provided with a spring 211 attached thereto, and a head 211, which is pressed against the inner opening end of the opening / closing hole 2200a by a spring force, and a rod 213. Become. The rod portion 2 13 has a first rack 2 14 a and a second rack 2 14 b. In the main body 220b of the cylinder 220, a push 215 is fitted to the end opposite to the opening / closing hole 220a. The spring 2 11 is fitted into the ring groove 2 15 a of the push 2 15, and the door 3 2 13 is slidable in the cylinder axial direction by the push 2 15. Supported. Therefore, the piston 2 10 is urged by the spring 2 1 1 in a direction in which the tilt self vent hole 2 2 1 is closed. The rod portion 21 of the piston 210 has a locking device 230 for reciprocating the piston and a variable resistor for generating a resistance in the biasing direction of the spring 211. The force generator 260 is connected in parallel. Further, the gas passage flow rate variable device 201 includes an occupant 赚 detecting device 110 for detecting the occupant ^ or an occupant data input device 110 for inputting occupant data by the occupant itself, and the occupant # ^ detection. The storage device 120 that temporarily stores the occupant data output from the device 110 or the occupant data input device 110 ′, and the elapsed time from the collision accident A timer 150 for monitoring and measuring a predetermined delay time from the start of the development of the bag is provided. The occupant physique detecting device 110 is, for example, a weight sensor installed in a seat. The distance is detected by an ultrasonic sensor. The return crew member 贿 data input device 110 ′ is composed of, for example, a ten-key input device installed beside a seat.

Reference numeral 100 denotes an arithmetic unit, which calculates a control signal of the drive unit ₂ using the data of the storage unit 120 and one of the output signals of the tiff self-timer 150. Note that the control signal is a force S output to an actuator 250 of the driving device by an output device 160, the output device 160 and the storage device 120 are connected to the arithmetic device 100 It is preferable to configure so as to be included. The lock device 230 includes a lock pinion 231, and is configured to be rotatable from a position where the first rack 2 14a and the lock pinion 231 are engaged with each other to a position where they cannot be engaged. The lock arm 2 32 supported by the shaft and the hook 2 32 a of the lock arm 2 32 are hooked on the hook 2 32 a by the first and second vertical portions 2 51 of the actuator 250. The first trigger arm 2 3 3 rotatably supported so as to be disengaged and the mouth pin 2 3 1 lift in a direction in which the pin pin 2 3 1 does not fit into the first rack 2 14 a. And a first spiral spring 2 3 4 for urging the spring. The variable resistance generator 260 includes a damper-attached pinion 261, and the second rack 2114b and the damper pinion 261 are moved from a position where they do not engage with each other. A second arm 262 pivotally supported so as to be rotatable to a suitable posture; and a hook 26a of the second arm 262, and a second listening portion of the actuator 250. The second trigger arm 261, which is rotatably supported so as to be disengaged from the hook 26a by 2 52, and the pinion with damper 261, are inserted into the second rack 214b. A spiral spring (264) for urging the second arm (262) in a matching direction. The pinion with damper 26 1 is the same as that shown in FIG. It consists of a pinion that rotates in mesh with 4b and a damper that is fixed to the tirf second arm 26. The self-damper part is composed of a torque damper or a viscous torque damper. The airbag device having the variable gas passage flow rate device according to the present invention is characterized in that, after a lapse of a predetermined delay time from the start of deployment of the airbag, the control signal output to the actuator 250 is used as a trigger to trigger the first drive unit 2 5 1) The first trigger arm 2 3 3 is set to M), and the lock vinyl 2 3 2 of the lock bin 2 3 1 and the first rack 2 1 4a are disengaged. As a result, the piston 210 repeats the opening / closing operation of the vent horn 21 2 with the panel constant of the spring 21 1. When the occupant detection device 110 determines that the occupant physique is large, the second drive arm 252 activates the second trigger arm 263 using the control signal output to the actuator 250 as a trigger. By connecting the pinion 2 61 with damper of the second arm 2 62 to the second rack 2 1 4 b, the piston 210 becomes the resistance and spring 2 1 of the pinion 2 61 with damper. The opening and closing operation of the vent hole 2 21 is repeated with a high panel constant combining the panel constant of 1. It will now be described with reference to FIG. 1. 1 to FIG. 1 2 with the airbag apparatus according to another embodiment having a瞧device B ₃ of another form.

The driving device B ₃ is the reciprocating motion of the piston 3 1 0, the internal pressure of the Bentohonore 3 2 1 formed in the cylinder 3 2 0 by closing, Eapa' grayed communicating with the cylinder 3 2 0 (not shown) Control. The cylinder 132 is composed of an opening / closing hole 320 a communicating with the air bag and a main body 320 b formed with the vent hole 320. Opening hole in the opening / closing hole 3 2 0a 3 2 2 is formed, and the knitting airbag is communicated. The elastic membrane 3 2 3 force S is attached so as to close the opening 3 22. In addition, one or more of the venomous vent holes 321 are formed on the side surface of the disgusting body part 320b. Then, when the internal pressure of the airbag reaches a peak state, a fiber plate 324 is disposed in the opening / closing hole portion 320a so as to break the bullet 332. Preferably, the elastic film 32 3 is a film made of silicon rubber. Also, the ttif plate 324 has a sharp top portion 324 a on the side of the bullet ((3 2 2 、、時に、時に時に時に時に時に時に時に時に時に時に時に時に時に時に時に. (See FIG. 12) at a position where the elastic membrane 3 23 is broken by the spring D. The spring 311 is attached to the piston 310 by the spring force. It comprises a head portion 312 pressed against the inner opening end of the opening / closing hole portion 320a, and a rod portion 313. The rack 314 is provided in the opening portion 313. Then, in the main body 3200b of the cylinder 320, a bush 315 force S is fitted to an end opposite to the opening / closing hole 320a. Is fitted in the annular groove 315 a of the bush 3 15, and the opening 3 13 is rotatably supported by the bush 3 15 in the cylinder axial direction. Therefore, the The stone 3110 is urged in the direction in which the bent hole 3221 is closed by the spring 3111. The elastic membrane 3233 causes gas to suddenly blow out from the inflator. The gas flows through the elastic membrane 3 2 3 until the internal pressure rises to the peak state At the peak, the elastic plate 3 2 4 is waiting at the position where the elastic 3 2 3 is deformed. The gas flow hits the piston 310 surface, and the piston 310 repeats the opening and closing operations of the vent hole 321 with the panel constant of the spring 311, and vibrates to control the gas outflow. As described above, the embodiments of the present invention have been described. However, the present invention is not limited to these embodiments, and can be changed in the technical idea shown in the claims. For example, the elapsed time and the deployed volume increase over time, so if you can specify the set values for each, you can use them as monitors for each insect.

Claims

Range of p 冃 request

1. A method for controlling the internal pressure of an airbag, which controls the internal pressure of the airbag during deployment by changing the gas flow rate passing through a vent hole,

Obtain occupant physique data in advance,

When deploying the airbag, monitor at least either the deployed volume of the knitted airbag or the elapsed time from the start of deployment of the MfS airbag,

When the airbag is at least a deployment volume equal to or more than a predetermined deployment volume in accordance with the knitting occupant physique data or after a lapse of a predetermined elapsed time in accordance with the occupant physique data, A method for controlling an internal pressure of an airbag, wherein a flow rate of a gas passing through the vent hole is changed according to physique data.

2. A method for controlling the internal pressure of an air bag, which controls the internal pressure of an air bag during deployment by changing the gas flow rate passing through a vent hole,

Obtain occupant physique data in advance,

At the time of deployment of the airbag, monitor the internal pressure of the airbag, and monitor at least either the deployment volume of the airbag or the elapsed time from the start of deployment of the airbag,

The airbag is at least one of a deployment volume equal to or greater than a predetermined deployment volume according to the tut own occupant data or after a lapse of a predetermined elapsed time according to the occupant physique data; and When the internal pressure of the bag reaches or exceeds a predetermined internal pressure according to the occupant physique data, the gas passing through the vent hole is determined at least according to either the Xianxiao Freeze physique data or the predetermined internal pressure. A method for controlling an internal pressure of an air bag, characterized by varying a flow rate.

3. The opening / closing member capable of closing the vent hole is biased by a specific spring force in a direction to close the vent hole, and a part of the spring force is absorbed in the biasing direction to vary the spring force. By doing so, it is possible to open and close the 3. The internal pressure control of an air bag according to claim 1, wherein the movement of the member is changed to change the gas passage area of the tins vent hole to change the gas flow rate passing through the vent hole. Method.

4. An air bag device having a gas passage flow rate variable device for a vent hole, wherein the gas passage flow rate variable device for a vent hole comprises:

A drive device for varying the gas flow rate passing through the vent hole,

An occupant detection device that detects the occupant or the occupant's own power S occupant

A storage device for temporarily storing occupant physique data output from the occupant physique detection device or input to the occupant data input device;

At least one of an expansion volume detection device that detects the expansion volume of the airbag or a timer that measures a predetermined elapsed time from when the airbag expansion start instruction signal is input,

An arithmetic unit that calculates a control signal of a flit self-drive device using data of the storage device and at least an output signal of the expanded volume detection device or the timer determined based on the data of the storage device. When,

An output device for outputting the control signal to the driving device;

An airbag device comprising:

5. An airbag device having a vent hole gas passage flow variable device, wherein the vent hole gas passage flow variable device comprises:

A «device for varying the gas flow through the vent hole,

The occupant detection device or the occupant's own force that detects the occupant s The occupant who inputs data! ^ Data manpower device,

An internal pressure detection device that detects the internal pressure of the air bag when the air bag is deployed, At least the deployment volume detection device that detects the deployment volume of the I5 airbag or the timer that measures a predetermined elapsed time from when the airbag deployment start instruction signal is input.

An arithmetic unit that calculates a control signal of a self-drive device using the data of the storage device, at least an output signal of any of the tiff self-expanding volume detection device or the tuts timer, and an output signal of the internal pressure detection device;

An output device for outputting the control signal to a knitting drive device;

Air bag equipment that has

6. The driving device is

An opening / closing member capable of closing the vent box,

A spring urged by the opening and closing member in a direction to close the vent hole,

The airbag device according to claim 4 or 5, further comprising a variable resistance generator that generates a resistance force in a biasing direction of the spring and is connected to the spring. .

7. The driving device is

A cylinder on which the vent horn is formed,

A piston reciprocating in the cylinder to open and close the vent hole,

A spring biased by the piston in a direction to close the vent hole,

The airpack device according to claim 4 or 5, further comprising a variable resistance generator that generates a resistance in the biasing direction of the spring and is provided in connection with the piston.

8. The cylinder has an opening / closing hole communicating with the airbag, and a main body having a vent hole.

The piston includes a head part into which the spring is inserted and pressed against the opening and closing hole by a spring force, and a rod part formed with a rack,

The variable resistance force generation is as follows: An arm including a pinion with a damper, an arm rotatably supported so that the rack and the pinion with a damper are engaged with each other, and from a posture to a mating posture;

A trigger arm hung on a hook formed on the arm and pivotally supported so as to be detached from the knitting hook using the Ml self-control signal as a trigger;

The air bag device according to claim 7, wherein the pinion with a damper includes a spiral spring for urging the tiff arm in a direction in which the pinion with the damper engages with the rack.

9. An airbag internal pressure control method for controlling the internal pressure of an airbag during deployment by changing the gas flow rate passing through a vent hole,

The time elapsed from the time of the collision accident is monitored by a timer, and after a predetermined delay time has elapsed from the start of the deployment of the air bag, the flow rate of gas passing through the tins vent hole is changed. Internal pressure control method.

1 0. Obtain crew data in advance,

10. The internal pressure control method for an air bag according to claim 9, wherein after the predetermined delay time has elapsed, the gas flow rate passing through the vent horn is changed according to the occupant physique data.

1 1. A method for controlling the internal pressure of an air bag that controls the internal pressure of the air bag during deployment by changing the gas flow rate passing through the vent hole.

An elastic membrane that closes the internal pressure detection port of the gas flow rate variable device blocks the gas flow from the start of deployment of the airbag until the internal pressure reaches a peak state,

The method for controlling the internal pressure of an airbag, wherein the bullet is broken when the internal pressure reaches a peak state, and the gas flow rate passing through the vent hole is changed.

1 2. An airbag apparatus having a variable gas passage flow rate device for a vent hole, wherein the variable gas flow rate flow device for a vent hole comprises:

A drive device for varying the gas flow rate passing through the vent hole,

A timer that monitors the time elapsed since the collision, and measures a predetermined delay time from the start of airbag deployment; An arithmetic unit for calculating a control signal of the t & m <j device using the output signal of the timer; and an output unit for outputting the control signal to the obscene driving device

Airbag equipment with a wooden floor

1 3. The gas passage flow rate variable device of the vent hole,

Further, an occupant female detection device for detecting the occupant's occupancy or an occupant physique data input device for the occupant himself to input occupant baldness data; A storage device for temporarily storing the obtained occupant data,

13. The airbag device according to claim 12, wherein the arithmetic device calculates a control signal of the tut self-drive device using data of the knitting memory device and an output signal of the timer.

1 4. The driving device is

A cylinder in which the vent hole is formed,

A piston that reciprocates in the cylinder and opens and closes the vent hole;

A spring biased by the piston in a direction to close the vent hole,

An elastic film that closes an open / close hole of the cylinder that communicates with the airbag;

When the internal pressure of the air bag reaches a peak state, the plate is disposed in the opening / closing hole so as to break the elastic membrane.

The airbag device according to claim 12 or 13, wherein the number of glues is that the airbag is provided.

1 5. The driving device is

A cylinder in which the vent hole is formed,

A piston that reciprocates the cylinder 內 to open and close the vent hole;

A spring biased by the piston in a direction to close the vent hole,

A locking device that locks the reciprocating motion of the piston, and is provided in connection with the piston;

14. The airbag device according to claim 12, further comprising: an actuator configured to release the hook device by using the control signal as a trigger.

16. The cylinder 1 is composed of an opening / closing hole communicating with the airbag and a main body having a vent hole formed therein.

The piston includes a head portion into which a knitting spring is inserted and pressed against a self-opening / closing hole portion by a spring force, and a rod portion formed with a rack,

The lock device,

A lock arm which is provided with a lock pinion, and which is rotatably supported so that the rack and the mouthpiece can engage with each other;

A trigger arm hung on a hook formed on the hook arm, and rotatably supported by a self-actuator so as to be detachable from the hook;

16. The airbag device according to claim 15, wherein the airbag device frequently comprises a spiral spring for urging the hook arm in a direction in which the hook pinion does not engage with the rack.

1 7. The cylinder 1 consists of a main body with an opening and closing hole communicating with the airbag and a vent hole.

The piston includes a head portion mounted on the spring force S and pressed against the opening / closing hole by a spring force, and a mouth portion formed with a first rack and a second rack.

The lock device,

A lock arm that includes a lock pinion, and is pivotally supported to be rotatable from a position where the first rack and the lock pinion engage with each other;

A second arm that includes a pinion with a damper, and is rotatably supported from a posture in which the second rack and the pinion with the damper do not fit to each other in a rotatable manner;

A first trigger arm hooked on a first hook formed on the lock arm and rotatably supported by the actuator so as to be disengaged from the first hook; and a second trigger arm formed on the second arm. A second trigger arm hung on two hooks and rotatably supported by the actuator so as to be disengaged from the second hook; and a mouth in a direction in which the mouth pinion does not engage with the first rack. With lock arm The first spiral spring,

A second spiral spring for urging the second arm in a direction in which the damper-attached pinion engages with the second rack;

16. The airbag device according to claim 15, wherein