JP2012051396A - Airbag device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an airbag device for a vehicle which prevents injury not only to chest but also to a head of a driver.SOLUTION: A steering column is provided with a fragile portion, and a bag and an inflator are mounted inside the fragile portion. The bag is constituted as a horizontal deployment bag which is deployed horizontally to the driver side, and an upward deployment bag which is integrally and continuously provided on the horizontal deployment bag via a partition wall with a valve and deployed upward avoiding the steering wheel after the deployment of the horizontal deployment bag. The horizontal deployment bag is provided with a reflection receiving portion which guides a gas flow upward at the time when the horizontal deployment is finished. A first gas generation portion for deploying the horizontal deployment bag and a second gas generation portion for deploying the upward deployment bag are provided inside a casing of the inflator. Both gas generation portions and the horizontal deployment bag are connected by gas injection nozzles. The inside of the gas injection nozzle that connects the second gas generation portion to the horizontal deployment bag is formed spirally. A control unit ignites the inflator in order of the first gas generation portion and second gas generation portion.

Description

  The present invention relates to a vehicle airbag device, and more particularly to a vehicle airbag device suitable for a commercial vehicle such as a cab-over type truck.

  In all categories of passenger cars and commercial vehicles, airbag devices are standard equipment and widely recognized as passenger protection devices.

  Currently, steering airbags that mainly protect the head, side airbags and curtain airbags that mainly protect passengers in case of side collisions, and knee airbags that mainly protect the thigh Air bag devices with various parts such as bags have been put on the market.

  Under such circumstances, as shown in FIG. 17, the commercial vehicle such as the cab-over type truck 1 having no crushable zone stands up unlike the layout of the steering device 3, that is, the angle of the steering column (steering shaft 5). When the vehicle collides as shown in FIG. 18, the steering column is more upright with respect to the normal position.

  For this reason, the airbag 9 of the airbag device mounted at the center of the steering wheel 7 is deployed to protect the head 13 of the driver 11, but the chest 15 moves forward due to the inertial force of the collision energy. There was a risk that the steering wheel 7 would be struck and the chest 15 would be seriously injured.

  Patent Document 1 discloses a selective deployment airbag device that prevents injury of an occupant riding in a passenger seat.

  This conventional example includes an impact detection sensor for detecting an impact at the time of a vehicle collision, a seat belt sensor for detecting whether or not a passenger seated in a passenger seat is wearing a seat belt, first and second inflators, A base chamber located in communication with the upper part of the diaphragm provided with at least one inner vent hole so that it can be freely moved by a pressure difference between the gas supplied from the 1 inflator or the second inflator; An airbag including a chest chamber formed in communication with an inner vent hole at a lower portion and a front portion of the base chamber; and receiving an input of a signal detected by the impact detection sensor to deploy and operate the airbag; The presence / absence of an occupant's seat belt detected by the seat belt sensor and an impact detection sensor The combination of the sensed impact force, and a control unit which determines the deployment whether chest chamber by selecting the operating presence of the second inflator.

  Thus, according to the selective deployment airbag device, the base chamber and the chest chamber can protect a wide area from the head of the passenger on the passenger seat to the chest.

JP 2007-302221 A

  However, the selective deployment airbag device is a device dedicated to the passenger seat that has no obstacle in the deployment direction of the base chamber or the chest chamber, and this airbag device is installed on the driver's seat side where a large obstacle called a steering wheel exists. In addition, Patent Document 1 does not disclose a technique for protecting a driver by unfolding a bag while avoiding an obstacle called a steering wheel.

  In the conventional example, the first and second inflators are used. However, when a plurality of inflators are used, it is actually difficult to install them.

  Furthermore, the conventional example determines whether or not the chest chamber can be deployed by selecting whether or not the second inflator is activated by a combination of the presence or absence of the seat belt of the occupant and the impact force detected by the impact detection sensor. Originally, an airbag device is an occupant protection device that should be used on the assumption that a seat belt is worn.

  The present invention has been devised in view of such circumstances, and an object of the present invention is to provide a vehicle airbag device that suppresses chest injury as well as the driver's head.

  In order to achieve such an object, the invention according to claim 1 is directed to a vehicle airbag apparatus including a sensor for detecting an impact at the time of a vehicle collision, a control unit for inputting a signal of the sensor, an inflator, and a bag. In this case, a weak part is provided in the steering column facing the driver's seat in the passenger compartment, the bag and the inflator are mounted inside the weak part, and the bag is pushed through the weak part to the driver side of the driver's seat. A horizontally deploying bag that deploys horizontally, and an upward deploying bag that is integrally connected to the horizontally deploying bag via a partition wall with a valve, and that deploys upward while avoiding the steering wheel after deploying the horizontally deploying bag. The inflator casing is provided with a reflection receiver that guides the gas flow toward the upward deployment bag when the horizontal deployment is completed. Provided with a first gas generating section for deploying the horizontal deployment bag and a second gas generating section for deploying the upper deployment bag, and the gas generating nozzle and the horizontal deployment bag are respectively provided with gas injection nozzles. And the gas injection nozzle that connects the second gas generation unit and the horizontal deployment bag is formed in a spiral shape, and the control unit is configured to control the first gas generation unit, the first gas generation unit, and the second gas generation unit based on a signal from the sensor. The inflator is ignited in the order of the two gas generators.

  According to a second aspect of the present invention, in the vehicle airbag device according to the first aspect of the present invention, a downward deployment bag that communicates with the horizontal deployment bag and is deployed downward is connected to the horizontal deployment bag. It is formed integrally.

  According to a third aspect of the present invention, in the vehicle airbag device according to the first aspect, a downward deployment bag that is deployed downward is provided inside the fragile portion separately from the horizontal deployment bag. A third gas generating part for mounting and deploying the lower deployment bag is provided in the casing of the inflator, and the third gas generation part and the lower deployment bag are connected by a gas injection nozzle.

  Furthermore, the invention according to claim 4 is provided separately from the horizontal deployment bag, wherein a downward deployment bag that deploys downward is attached to the inside of the fragile portion, and the downward deployment bag and the first gas generation unit. Are connected by a gas injection nozzle.

  According to a fifth aspect of the present invention, in the vehicle airbag device according to the first aspect, the reflection receiver is formed of a material harder than a molding material of the horizontal deployment bag. .

  According to the first and fifth aspects of the invention, in a commercial vehicle such as a cab-over type truck that does not have a crushable zone, the horizontal deployment bag and the upper deployment bag ensure the head and chest of the driver. Can be protected.

  In particular, when the bag is deployed, the horizontal deployment bag and the upper deployment bag are not deployed at the same time, but the inflator is ignited in the order of the first gas generation unit and the second gas generation unit, and the horizontal deployment bag is first moved to the driver side. After deploying and deploying the horizontal deployment bag, the upper deployment bag is configured to be deployed upward away from the steering wheel. Further, the vortex gas flow at the end of deployment is applied to the horizontally deployed bag. As a result of providing a reflection receiver that guides the vehicle in the direction of the upward deployment bag, and further increasing the momentum with the gas flow from the second gas generator as a vortex, the upward deployment bag is reliably positioned between the steering wheel and the driver. It can be deployed upwards to protect the driver's head and chest.

  In addition, since the first and second gas generating portions are provided in the casing of one inflator, there is an advantage that the installation location of the inflator is not difficult.

  On the other hand, according to the inventions according to claims 2 to 4, the thigh of the driver can be protected together with the head and the chest.

  According to the third aspect of the present invention, the third gas generation section for deploying the downward deployment bag downward is provided in the inflator, so that the ignition timing of the third gas generation section can be adjusted by the control unit. Therefore, there is an advantage that the deployment timing of the downward deployment bag can be adjusted, for example, by shifting the ignition timing of the first gas generation unit and the third gas generation unit according to the specifications of the vehicle.

  Further, the invention according to claim 4 has an advantage that the structure of the inflator can be simplified as compared with the invention of claim 3.

  Furthermore, according to the invention which concerns on Claim 3 and Claim 4, the horizontal expansion | deployment bag and the downward expansion | deployment bag were made into a different body, and the horizontal expansion | deployment bag and the downward expansion | deployment bag were integrated. Compared to a bag, it has the advantage of reducing the overall capacity of the bag when deployed.

FIG. 6 is a side view of the interior of a vehicle (cab-over type truck) equipped with a vehicle airbag device according to an embodiment of claims 1 and 5. It is the principal part perspective view and principal part enlarged view of a steering column. It is a side view of the bag accommodated in the steering column, and an inflator. It is a side view of the developed bag. It is a front view of the developed bag. It is a schematic block diagram of an inflator. It is explanatory drawing of the expansion | deployment direction of the bag for horizontal expansion | deployment. It is explanatory drawing of the expansion | deployment direction of the bag for upper expansion | deployment. It is explanatory drawing of the expansion | deployment order of the bag for horizontal expansion | deployment, and the bag for upward expansion | deployment. FIG. 3 is a side view of the interior of the passenger compartment showing the unfolded state of the bag at the time of a vehicle collision. FIG. 6 is a side view of the interior of the vehicle interior showing a bag deployed state at the time of a vehicle collision of a vehicle equipped with the vehicle airbag device according to one embodiment of claim 1, claim 2, and claim 5. FIG. 6 is a side view of the interior of the vehicle interior showing a bag deployed state at the time of a vehicle collision of a vehicle equipped with the vehicle airbag device according to one embodiment of claim 1, claim 3, and claim 5. It is a schematic block diagram of an inflator. It is explanatory drawing of the expansion | deployment direction of the bag for horizontal expansion | deployment, the bag for upper expansion | deployment, and the bag for downward expansion | deployment. It is explanatory drawing of the expansion | deployment order of the bag for horizontal expansion | deployment, the bag for upper expansion | deployment, and the bag for downward expansion | deployment. It is a schematic block diagram of the inflator used for the vehicle airbag apparatus which concerns on one Embodiment of Claim 4. FIG. 6 is a side view of a cabin of a cab over type truck provided with a conventional vehicle airbag device. FIG. 3 is a side view of the interior of the vehicle compartment showing the unfolded state of the bag when the cab over type truck collides.

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

  FIGS. 1 to 10 show an embodiment of a vehicle airbag device according to claims 1 and 5. In FIGS. 1 to 3, reference numeral 21 denotes a vehicle (cab over type truck) 23. A steering wheel of the steering device 25, 27 is a steering shaft, and 29 is a cylindrical steering column covering the steering shaft 27. As shown in FIG. A fragile portion 35 is formed by providing an invisible tear line 33.

  As shown in FIGS. 2 and 3, the bag 39 of the airbag device 37 and the module 42 of the inflator 41 according to this embodiment are mounted inside the fragile portion 35.

  As in the prior art, the airbag device 37 includes a sensor (not shown) for detecting an impact at the time of a vehicle collision, a control unit (ECU) (not shown) for inputting a signal of the sensor, the bag 39, and an inflator 41. A control unit that receives a signal from a sensor that detects the impact of a vehicle collision ignites the inflator 41, and the generated gas flow instantaneously deploys the bag 39 into the vehicle interior.

  As described above, the present embodiment is characterized in that the mounting position of the bag and the inflator (module) that has been conventionally mounted at the center of the steering wheel is changed into the steering column 29.

  Next, the shape of the bag 39, which is the second feature of the present embodiment, will be described. The bag 39 is formed of a nylon material, folded into a predetermined shape as shown in FIG. Has been.

  As shown in FIGS. 4, 5, and 7 to 9, the bag 39 is used for horizontal deployment that initially pushes through the fragile portion 35 and initially deploys horizontally in the direction of the driver 43 of the driver seat 31 in the event of a vehicle collision. After the deployment of the bag 45 and the horizontally deploying bag 45, the unfolded shape is L-shaped when viewed from the side, as shown in FIG. 9. The bag 45 is formed in a substantially rectangular parallelepiped shape having a wide and thick capacity sufficient to protect the driver 43 of the driver's seat 31 when deployed.

  On the other hand, as described above, the upper deployment bag 47 is located between the steering wheel 21 and the driver 43 while avoiding the steering wheel 21 after the deployment of the horizontal deployment bag 45 as shown in FIGS. Is applied to protect the head 49 and the chest 51 of the driver 43. As described above with reference to FIG. 18, the steering column is more upright from the normal position in the event of a vehicle collision. The embodiment captures such a feature and instantaneously deploys the upward deployment bag 47 from between the steering wheel 21 and the driver 43 upward.

  4 and 5, the upper deployment bag 47 is formed integrally with the horizontal deployment bag 45, and has a substantially rectangular parallelepiped shape with substantially the same width and substantially the same thickness as the horizontal deployment bag 45. The volume is set to be smaller than that of the horizontal deployment bag 45 because of the structure of deploying upward from the front end side of the horizontal deployment bag 45 while avoiding the steering wheel 21. As shown in FIG. 4, a partition wall 55 made of a nylon material provided with a valve 53 is provided between the horizontal deployment bag 45 and the upper deployment bag 47.

  When the inflator 41 is ignited and the gas flow G is injected into the bag 39 as shown in FIG. 7, the valve 53 and the partition wall 55 are used to reliably deploy the horizontal deployment bag 45 in the horizontal direction first. Without 53 and the partition wall 55, the upper deployment bag 47 may be deployed obliquely upward simultaneously with the deployment of the horizontal deployment bag 45, and the upper deployment bag 47 may collide with the steering wheel 21.

  Therefore, in the present embodiment, first, the valve 53 is closed when the horizontal deployment bag 45 is deployed, and after the horizontal deployment bag 45 is deployed in the direction of the driver 43, the valve 53 is caused by the gas flow G as shown in FIGS. Is opened, and the gas flow G flows into the upper deployment bag 47 so that the upper deployment bag 47 is deployed upward while avoiding the steering wheel 21.

  For this reason, as shown in FIGS. 4 and 5, a reflection receiver 57 for guiding the gas flow G toward the upper deployment bag 47 at the end of deployment is provided at the tip of the horizontally deployed bag 45 deployed horizontally. .

  The reflection receiver 57 is formed of the same nylon material as that of the bag 39. However, the reflection receiver 57 is provided by attaching a cloth made of a slightly harder nylon material than the bag 39. When the gas flow G hits 57, the gas flow G is guided upward and the valve 53 is opened.

  The third feature of the present embodiment is that the inflator 41 for expanding the bag 39 is improved.

  FIG. 6 is a schematic configuration diagram of the inflator 41, in which 59 is a casing of the inflator 41. Like the conventional cylinder type inflator, the casing 59 is formed in a cylindrical shape that is advantageous in terms of strength. The same capacity as the casing.

  Thus, the casing 59 is divided into two storage chambers 63 and 65 by a single partition wall 61. A first gas generating portion 67 for deploying the horizontal deployment bag 45 is provided in one storage chamber 63, and a second gas generation for deploying the upper deployment bag 47 in the other storage chamber 65 is provided. A portion 69 is provided.

  As shown in FIG. 6, each of the first and second gas generating units 67 and 69 includes an electric ignition device (igniter) 71, an ignition agent 73, and an explosive 75, similar to a conventional inflator. A gas injection nozzle 77 for injecting the gas flow G generated in the first gas generation unit 67 into the horizontal deployment bag 45 and the gas flow G generated in the second gas generation unit 69 through the horizontal deployment bag 45. Gas injection nozzles 79 that are injected into the upper deployment bag 47 are connected to the horizontal deployment bag 45, respectively, but the gas injection nozzle 79 is formed in a spiral shape so as to perform gas injection. A spiral gas flow G is generated with momentum.

  The control unit ignites the inflator 41 in the order of the first gas generating unit 67 and the second gas generating unit 69 based on a signal from a sensor that detects the impact of the vehicle collision. As shown in FIG. 9, the gas flow G generated in the first gas generating portion 67 flows into the horizontal deployment bag 45, and the horizontal deployment bag 45 is initially deployed.

  Next, the gas flow G generated by the second gas generating unit 69 flows into the developing horizontal deployment bag 45 as a vortex, and after the deployment of the horizontal deployment bag 45, the second gas that has become a vortex flow. The gas flow G from the generating unit 69 collides with the reflection receiver 57 and is guided upward, and the valve 53 is opened to expand the upper deployment bag 47 upward.

  In addition, in FIG. 4, reference numerals 81 and 83 denote gas vent holes provided in the horizontal deployment bag 45 and the upper deployment bag 47 so that the gas flow G after deployment is discharged to the outside from both the gas vent holes 81 and 83. It has become.

  Since the airbag device 37 according to the present embodiment is configured as described above, when the vehicle collides and the sensor detects the impact, a signal from the sensor is input to the control unit, and the control unit receives the first gas. The inflator 41 is instantaneously ignited in the order of the generation unit 67 and the second gas generation unit 69.

  Then, as shown in FIGS. 7 and 9, first, the gas flow G generated by the first gas generating portion 67 flows into the horizontal deployment bag 45, and the horizontal deployment bag 45 moves the weakened portion 35 of the steering column 29. Push and break out horizontally to the driver 43 side of the driver's seat 31.

  When the horizontal deployment bag 45 is deployed in this manner, the gas flow G generated in the second gas generation unit 69 becomes a vortex in the gas injection nozzle 79 as shown in FIGS. Flow into. After the horizontal deployment bag 45 is deployed, the vortex gas flow G collides with the reflection receiver 57 and is guided upward, and the gas flow G opens the valve 53 and flows into the upper deployment bag 47. As shown in FIG. 10, an upper deployment bag 47 is deployed upward between the steering wheel 21 and the driver 43 to protect the head 49 and the chest 51 of the driver 43.

  Then, after the horizontal deployment bag 45 and the upper deployment bag 47 are deployed, the gas flow G is discharged from the gas vent holes 81 and 83 to the outside.

  As described above, according to the airbag device 37 according to the present embodiment, the horizontal deployment bag 45 and the upper deployment bag 47 are arranged at the head of the driver 43 in the vehicle (cab over type truck) 23 having no crushable zone. The part 49 and the chest part 51 can be reliably protected.

  In particular, in the present embodiment, when the bag 39 is deployed, the horizontal deployment bag 45 and the upper deployment bag 47 are not deployed simultaneously, and the inflator 41 is ignited in the order of the first gas generation unit 67 and the second gas generation unit 69. The horizontal deployment bag 45 is first deployed to the driver 43 side, and after the deployment of the horizontal deployment bag 45, the upper deployment bag 47 is deployed upward avoiding the steering wheel 21. A reflection receiver 57 is provided at the front end of the horizontally deploying bag 45 deployed to guide the vortex gas flow G toward the upward deploying bag 47 when the deployment is completed. Further, the gas stream G from the second gas generating unit 69 is provided. As a result, the upward deployment bag 47 reliably deploys upward between the steering wheel 21 and the driver 43, and the driver 43 It is possible to protect the parts 49 and chest 51.

  Further, unlike the conventional example of Patent Document 1 in which the base chamber and the chest chamber are developed using two inflators, the present embodiment has two storage chambers 63 in a casing 59 having the same capacity as a conventional cylinder type inflator. , 65 and the first and second gas generators 67 and 69 are provided, so that there is an advantage that the installation location of the inflator 41 is not troublesome.

  In the above embodiment, a cloth made of a nylon material that is slightly harder than the bag 39 is attached, and the reflection receiver 57 is provided. However, for example, the reflection receiver may be formed using a foam material. The structure of the receptacle 57 is not limited to the above embodiment.

  FIG. 11 shows a side view of the interior of the vehicle interior showing the deployed state of the bag 39-1 at the time of a vehicle collision of the airbag device 37-1 according to one embodiment of the first, second and fifth aspects. In addition to the configuration of the bag 39, the airbag device 37-1 according to the form communicates with the horizontal deployment bag 45 so as to protect the thigh 85 of the driver 43 in addition to the head 49 and the chest 51. A downward deployment bag 87 that extends downward is integrally formed, and the downward deployment bag 87 is expanded downward by the gas flow from the first gas generating portion 67 simultaneously with the horizontal deployment bag 45. It is. In addition, since the other structure is the same as that of the said embodiment, the same code | symbol is attached | subjected to the same thing and those description is abbreviate | omitted.

  The airbag device 37-1 according to the present embodiment is configured as described above, and according to the present embodiment, the thigh 85 of the driver 43 can be protected together with the head 49 and the chest 51. And has the advantage that the installation location of the inflator 41 is not troublesome.

  12 to 15 show an airbag apparatus according to one embodiment of claims 1, 3 and 5, and the present embodiment will be described below with reference to the drawings. However, the embodiment is the same as the embodiment of FIG. The same reference numerals are given to those and their description is omitted.

  In the figure, 89 is a downward deployment bag that is deployed downward to protect the thigh 85 of the driver 43 when the vehicle collides. The downward deployment bag 89 has a smaller capacity than the horizontal deployment bag 45. When not deployed, the bag 39 is folded and housed and mounted inside the fragile portion 35 described above.

  FIG. 13 shows a schematic configuration of the inflator 41-1. Inside the casing 59 of the inflator 41-1, three storage chambers 65, 93, and 95 are partitioned by two partition walls 61 and 91, and FIG. As in the embodiment, a second gas generation unit 69 for deploying the upper deployment bag 47 is provided in the storage chamber 65.

  Further, a first gas generation part 97 for deploying the horizontal deployment bag 45 is provided in another storage chamber 93, and a third gas generation unit 99 for deploying the downward deployment bag 89 in the remaining storage chamber 95. Each gas generation unit 69, 97, 99 includes an electric ignition device 71, an ignition agent 73, and an explosive 75. A gas injection nozzle 77 that injects the gas flow G generated in the first gas generation unit 97 into the horizontal deployment bag 45 and the gas flow G generated in the second gas generation unit 69 through the horizontal deployment bag 45. A gas injection nozzle 79 for injecting the gas into the upper deployment bag 47 is connected to the horizontal deployment bag 45, and the gas flow G generated by the third gas generation unit 99 is injected into the lower deployment bag 89. The gas injection nozzle 101 is connected to the downward deployment bag 89. Although not shown, the downward deployment bag 89 is also provided with a vent hole.

  Based on the signal from the sensor that senses the impact of the vehicle collision, the control unit sets the inflator 41-1 in the order of the first gas generation unit 97 and the third gas generation unit 99, and then the second gas generation unit 69. It is designed to ignite.

  Since the airbag apparatus 37-2 according to the present embodiment is configured as described above, when the vehicle collides and the sensor detects the impact, a signal from the sensor is input to the control unit. The inflator 41-1 is ignited simultaneously with the first gas generation unit 97 and the third gas generation unit 99 and then in the order of the second gas generation unit 69.

  Then, as shown in FIGS. 14 and 15, first, the gas flow G generated in the first gas generation unit 97 flows into the horizontal deployment bag 45 and the gas flow G generated in the third gas generation unit 99. Flows into the downward deployment bag 89, and the horizontal deployment bag 45 pushes through the fragile portion 35 of the steering column 29 and deploys horizontally to the driver 43 side of the driver's seat 31. At the same time, the downward deployment bag 89 is fragile. The part 35 is pushed through and deployed downward to instantly protect the thigh 85 of the driver 43.

  When the horizontally deploying bag 45 is deployed in this manner, the upper deploying bag 47 is deployed upward so as to avoid the steering wheel 21 as in the embodiment of FIG. It will be protected.

  As described above, the airbag device 37-2 according to the present embodiment also has an advantage that the thigh 85 of the driver 43 can be protected together with the head 49 and the chest 51, and the inflator 41 can be installed. Has the advantage of not having to worry about.

  In the present embodiment, the first gas generation unit 97 and the third gas generation unit 99 are simultaneously ignited in the order of the second gas generation unit 69, but the inflator 41-1 is ignited in this order. Since the third gas generation unit 99 is separately provided in 1, the ignition timing of the third gas generation unit 99 can be adjusted by the control unit. Therefore, the first gas generation unit 97 and the third gas generation unit 97 can be adjusted according to vehicle specifications. There is an advantage that the deployment timing of the downward deployment bag 89 can be adjusted, for example, by shifting the ignition timing of the gas generator 99.

  Further, in this embodiment, since the bag 39 and the downward deployment bag 89 are separated, the horizontal deployment bag 45 and the downward deployment bag 87 are integrated with each other as compared with the large bag 39-1 shown in FIG. , It has the advantage that the capacity at the time of deployment can be reduced.

  FIG. 16 shows an inflator used in an airbag device according to an embodiment of the fourth aspect. The inflator 41-2 of this embodiment is replaced with the inflator 41-1 of FIG. 13, and the first gas generation of the inflator 41 of FIG. The gas injection nozzle 101 is connected between the portion 67 and the downward deployment bag 89 of FIG. 12, and simultaneously with the horizontal deployment bag 45, the downward deployment bag 89 is lowered by the gas flow G from the first gas generation portion 67. It is made to expand to.

  In addition, since the other structure is the same as that of each said embodiment, the same code | symbol is attached | subjected to the same thing and those description is abbreviate | omitted.

  Since the present embodiment is configured as described above, the present embodiment can also protect the thigh 85 of the driver 43 in addition to the head 49 and the chest 51, and can also be compared with the embodiment of FIG. In addition, there is an advantage that the structure of the inflator 41-2 can be simplified.

  Further, even in the present embodiment, since the bag 39 and the downward deployment bag 89 are separated, the horizontal deployment bag 45 and the downward deployment bag 87 are integrated into a large capacity bag 39-1 in FIG. Compared to the above, there is an advantage that the capacity of the entire bag at the time of deployment can be reduced.

  In addition, although each embodiment mentioned above applies this invention to a cab over type truck, it is applicable also to the other commercial vehicle which does not have a crushable zone.

21 Steering wheel 23 Vehicle (cab over truck)
25 Steering device 27 Steering shaft 29 Steering column 31 Driver's seat 35 Fragile parts 37, 37-1 and 37-2 Airbag devices 39 and 39-1 Bags 41 and 41-1, 41-2 Inflator 43 Driver 45 Horizontal deployment bag 47 Upper deployment bag 49 Head 51 Chest 53 Valve 55 Partition 57 Reflection receiver 59 Casing 61, 91 Partition 63, 65, 93, 95 Storage chamber 67, 97 First gas generator 69 Second gas generator 71 Electric ignition device 73 Ignitant 75 Explosives 77, 79, 101 Gas injection nozzle 81, 83 Gas vent hole 85 Thigh 87, 89 Downward deployment bag 99 Third gas generating part G Gas flow

Claims (5)

In a vehicle airbag device including a sensor for detecting an impact at the time of a vehicle collision, a control unit for inputting a signal of the sensor, an inflator and a bag,
A fragile part is provided in the steering column facing the driver's seat in the passenger compartment, and the bag and the inflator are mounted inside the fragile part,
A horizontal deployment bag for horizontally deploying the bag to the driver side of the driver's seat by pushing through the fragile portion; and a continuous deployment bag via a partition wall with a valve to the horizontal deployment bag, It is composed of an upper deployment bag that deploys upward after avoiding the steering wheel after deployment, and the horizontal deployment bag is provided with a reflection receiver that guides the gas flow toward the upward deployment bag at the end of horizontal deployment,
In the casing of the inflator, a first gas generation unit that deploys the horizontal deployment bag and a second gas generation unit that deploys the upper deployment bag are provided, and both the gas generation unit and the horizontal deployment bag are provided. Each is connected by a gas injection nozzle, and the inside of the gas injection nozzle that connects the second gas generation unit and the horizontal deployment bag is formed in a spiral shape,
The control unit ignites the inflator in the order of the first gas generation unit and the second gas generation unit based on a signal from the sensor.   2. The vehicle airbag device according to claim 1, wherein a lower deployment bag that communicates with the horizontal deployment bag and deploys downward is integrally formed with the horizontal deployment bag.   Provided separately from the horizontal deployment bag is a lower deployment bag that deploys downward, inside the fragile portion, and a third gas generation unit that deploys the lower deployment bag in the casing of the inflator. The vehicle airbag device according to claim 1, wherein the third gas generator and the downward deployment bag are connected by a gas injection nozzle.   Separately from the horizontal deployment bag, a downward deployment bag that is deployed downward is mounted inside the fragile portion, and the downward deployment bag and the first gas generation unit are connected by a gas injection nozzle. The vehicle airbag device according to claim 1. The vehicle airbag device according to claim 1, wherein the reflection receiver is formed of a material harder than a molding material of a horizontally deploying bag.

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