JP5933236B2 - Gas supply device and airbag device - Google Patents

Description

  The present invention relates to an airbag device mounted on a vehicle and a gas supply device for an airbag.

  An airbag is a device that inflates and deploys between an occupant and a steering wheel or between an occupant and a passenger compartment side wall in the event of a vehicle collision to protect the occupant. The airbag is configured to inflate and deploy using gas, and is provided with a gas generator called an inflator as a gas generation source. The inflator is filled with a gas generating agent, burns the gas generating agent due to detection of an impact by a sensor or the like, and jets gas. There are various types of inflators, such as a disk-shaped disk type and a cylindrical cylinder type, depending on the type of airbag.

  In order for the airbag to inflate and deploy instantaneously, it is necessary to efficiently distribute the gas ejected from the inflator to the inside of the airbag. In response to this, many airbags include a member called a deflector or a diffuser in order to adjust the flow of gas ejected from the inflator.

  For example, in the side airbag described in Patent Document 1, a cloth-made diffuser covers the periphery of a cylinder-type inflator. This diffuser is formed by winding a cloth material cut into a rectangular shape around an inflator so as to form a cylindrical shape. Both ends of the diffuser in the longitudinal direction (both ends in the longitudinal direction of the inflator) are open, and the diffuser has a function of guiding the gas ejected from the inflator in the longitudinal direction.

  Also in the knee airbag described in Patent Document 2, a cylinder-type inflator is covered with a cylindrical diffuser. The diffuser described in Patent Document 2 seems to be made of metal, and after inserting the inflator inside the cylindrical shape, the inflator is fixed by being caulked from the outside.

JP 2011-126499 A JP 2010-36882 A

  Currently, there is a tendency for the vehicle to become more compact, and the above-described deflector and diffuser are desired to have a simpler and cheaper configuration. Here, in the configuration of Patent Document 1, the inflator has a stud bolt for attachment to a vehicle, and the cloth diffuser is provided with a hole through which the stud bolt is passed. On the other hand, in the configuration of Patent Document 2, the inflator does not have a stud bolt, and the stud bolt is provided in a metal diffuser that covers the outside of the inflator.

  For the inflator with a stud bolt described in Patent Document 1, considering heat resistance and the like, it is more convenient to combine with the metal diffuser described in Patent Document 2 than the cloth diffuser There is. However, in the metal and cylindrical diffuser described in Patent Document 2, it is difficult to insert an inflator with a stud bolt, and a simple and expensive configuration results in a complicated and expensive configuration.

  In view of the above problems, the present invention is a gas supply device mainly for an air bag including a metal deflector and a cylinder-type inflator, and a gas supply device having a simple and inexpensive configuration, and the gas supply device. It aims at providing the airbag apparatus using this.

  In order to solve the above-described problems, a typical configuration of a gas generator according to the present invention is a gas supply device that is attached to an airbag and supplies inflation and deployment gas to the airbag. A cylinder-type inflator having a gas ejection port for ejecting gas, and a deflector made of sheet metal, wound around the inflator with a gap between the inflator and covering at least the gas ejection port The inflator further includes one or more stud bolts provided on the outer surface and fastened to the vehicle, and the deflector includes a substantially circular first hole through which the stud bolt is passed, and a deflector from the first hole. It is provided at a position away from the winding end side of the wire, and the stud bolt that is passed through the first hole is further passed along the length along which the deflector is wound. A second hole, and the second hole is provided to narrow the second hole near the end on the first hole side, and interferes with the stud bolt that is about to move from the end. It has the part.

  The above-described deflector has a simple configuration and can be assembled without performing welding or bolting. In particular, the interference part of the second hole part interferes with the stud bolt, so that it does not come off the inflator even if it receives gas pressure. In addition, because it is made of metal, it has excellent heat resistance, and with the above configuration, the configuration is simple and the cost can be reduced, and the inflator and the deflector can be assembled with sufficient strength. A gas supply device having excellent heat resistance can be provided.

  The second hole may be narrowed except for both ends of the second hole by providing an interference part. With this configuration, the stud bolt is inserted into one end side of the second hole portion, and the deflector is further wound so that the stud bolt reaches the other end side. The interference portion interferes with the stud bolt and deflects. And the inflator are securely assembled. Thus, if it is the said structure, a deflector can be easily assembled | attached to an inflator.

  The second hole is generally L-shaped by bending the region near the end on the first hole side, and the first hole is formed in the bent region of the second hole. It may be a long hole shape having a substantially parallel major axis. With this configuration, the deflector and the inflator are subjected to gas pressure only by winding the deflector and finally shifting the deflector along the stud bolt along the long diameter of the first hole and the bent area of the second hole. However, it can be firmly assembled so that it will not come off.

  In order to solve the above-described problems, a typical configuration of an airbag device according to the present invention includes the above-described gas supply device. As a result, an airbag device with a simple configuration and reduced cost can be realized.

  According to the present invention, a gas supply device mainly for an air bag including a metal deflector and a cylinder-type inflator and having a simple and inexpensive configuration, and an air bag using the gas supply device An apparatus can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is the figure which illustrated the outline | summary of the gas supply apparatus concerning 1st Embodiment of this invention, and an airbag apparatus. It is the figure which illustrated each element which comprises the gas supply apparatus of FIG.1 (b), respectively. It is the figure which illustrated the state before performing the bending process of the deflector of FIG.2 (d). It is the figure which illustrated the process of attaching the deflector of FIG. 3 to an inflator. It is the figure which illustrated the 1st modification of the deflector of FIG. It is the figure which illustrated the 2nd modification of the deflector of FIG. It is the figure which illustrated the process of attaching the deflector of FIG. 6 to an inflator.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

  FIG. 1 is a diagram illustrating an outline of a gas supply device 100 and an airbag device according to the first embodiment of the present invention. In FIG. 1A, the gas supply device 100 is applied to a side airbag 102 which is an example of an airbag device. The gas supply device 100 can be applied to various airbag devices such as a knee airbag and a curtain airbag in addition to the side airbag 102.

  The side airbag 102 illustrated in FIG. 1A is mainly installed on a side portion of a front seat (not shown), and is inflated between an occupant and a vehicle interior side wall when an impact such as a collision accident occurs. expand. This expansion and expansion is performed by a gas for expansion and expansion supplied from the gas supply device 100.

  FIG.1 (b) is the figure which illustrated the gas supply apparatus 100 of Fig.1 (a) independently. The gas supply device 100 includes a cylinder-type inflator 104 and a deflector 106 that rectifies the gas ejected from the inflator 104. The inflator 104 is a gas generator and is filled with a gas generating agent (not shown). The deflector 106 is a member formed in a cylindrical shape covering the periphery of a part of the inflator 104, and serves to guide gas back and forth in the longitudinal direction of the inflator 104 indicated by arrows in the drawing.

  FIG. 2 is a diagram illustrating each element constituting the gas supply device 100 of FIG. FIG. 2A illustrates the inflator 104 of FIG. 1B alone. A plurality of gas jets 108 are provided on the outer surface of the inflator 104, and the gas generated by burning the gas generating agent therein is jetted from the gas jets 108. In addition, two stud bolts 110a and 110b are provided on the outer surface of the inflator 104, and the inflator 104 is installed by fastening the stud bolts 110a and 110b to a seat (not shown).

  FIG. 2B is an arrow A view of the inflator 104 of FIG. A connector 112 is provided at one end of the inflator 104 illustrated in FIG. A harness (not shown) is connected to the connector 112, and the inflator 104 receives a signal notifying the detection of impact from a sensor (not shown) through the harness, and ignites the gas generating agent internally due to this.

  FIG.2 (c) has illustrated the deflector 106 of FIG.1 (b) independently. The deflector 106 is formed by bending a sheet metal, and is attached to a position that covers the gas ejection port 108 in the inflator 104 illustrated in FIG. The inner diameter R1 of the deflector 106 is larger (R1> R2) than the outer diameter R2 (see FIG. 2A) of the inflator 104 so that a gap S1 (see FIG. 1B) through which gas passes can be formed. Is set.

  FIG.2 (d) is the B view of FIG.2 (c). The deflector 106 is provided with holes (first hole portions 114a and 114b and second hole portions 116a and 116b) through which the stud bolts 110a and 110b (see FIG. 2A) of the inflator 104 are passed. In the present embodiment, the shape of these holes is characteristic, and thereby the deflector 106 having a simple configuration is realized.

  FIG. 3 is a diagram illustrating a state before bending the deflector 106 of FIG. The deflector 106 is provided with two first hole portions 114a and 114b and second hole portions 116a and 116b through which stud bolts 110a and 110b (see FIG. 2A) are passed through a rectangular sheet metal made of mild steel. It is formed by that. When the deflector 106 is installed, the deflector 106 is attached by being bent so as to be wound around the inflator 104 (see FIG. 2A). At that time, the deflector 106 is wound along the long side direction indicated by the arrow D1. Hereinafter, this long side direction is referred to as a winding direction D1.

  Of the two types of holes, the first holes 114a and 114b are formed in a substantially circular shape. The second holes 116a and 116b are provided at positions distant from the winding end side (winding direction D1 side) when viewed from the first holes 114a and 114b, and are further extended along the winding direction D1. It is formed in a scale shape. The second hole portions 116a and 116b are provided with interference portions 118a and 118b at positions closer to the first hole portion so as to narrow the width thereof. The interference portions 118a and 118b interfere with the stud bolts 110a and 110b (see FIG. 2A) passed through the second holes 116a and 116b, and hold the deflector 106 in a wound state. It is.

  FIG. 4 is a diagram illustrating a process of attaching the deflector 106 of FIG. 3 to the inflator 104. As illustrated in FIG. 4A, the deflector 106 is first attached to the inflator 104 through the stud bolts 110a and 110b in the first holes 114a and 114b. Next, as illustrated in FIG. 4B, the deflector 106 is bent so as to be wound around the inflator 104.

  As illustrated in FIG. 4C, the deflector 106 is wound around the inflator 104 so as to go around the inflator 104, and then the stud bolts 110a and 110b are passed through the second holes 116a and 116b. In this state, the deflector 106 is further wound so that the stud bolts 110a and 110b slide in the second holes 116a and 116b. Then, as illustrated in FIG. 4D, the stud bolts 110a and 110b pass over the interference portions 118a and 118b and are positioned at the end portions 117a and 117b of the second holes 116a and 116b. It should be noted that the interference portions 118a and 118b may be processed so that the stud bolts 110a and 110b cannot pass again, for example, by caulking again after passing the stud bolts 110a and 110b.

  In the state illustrated in FIG. 4D, when the winding of the deflector 106 is likely to be eliminated, in other words, when the stud bolts 110a and 110b try to move from the end portions 117a and 117b, the stud bolts 110a and 110b Since the interference parts 118a and 118b interfere, they are prevented. As a result, the deflector 106 can maintain its winding state. Thus, in this embodiment, the deflector 106 can be assembled to the inflator 104 with sufficient strength without performing welding, bolting, or the like.

  According to the configuration described above, even if the deflector 106 is a simple and inexpensive configuration using sheet metal, it does not come off even when subjected to gas pressure, and in addition, it is excellent in heat resistance because it is made of metal. Thus, it can sufficiently function as a rectifying member. In addition, it is possible to reduce the labor of workers during assembly work.

  When the gas is ejected, it is assumed that the stud bolts 110a and 110b pass through the interference portions 118a and 118b, and the stud bolts 110a and 110b are moved to the opposite ends, so that the winding of the deflector 106 is somewhat eliminated. However, the function of the deflector 106 is not significantly impaired.

(First modification)
FIG. 5 is a diagram illustrating a first modification of the deflector 106 in FIG. 3. The deflector 200 illustrated in FIG. 5 is different from the deflector 106 in FIG. 3 in the shape of the second holes 202a and 202b. The second holes 202a and 202b are narrowed except for both ends of the second holes 202a and 202b by providing the interference parts 204a and 204b. Even in this configuration, the stud bolts 110a and 110b are first inserted into the first holes 114a and 114b, and then bent so as to be wound around the inflator 104 (see FIG. 2A).

  Next, the stud bolts 110a and 110b (see FIG. 2A) are inserted into the one ends 203a and 203b of the second holes 202a and 202b, and the stud bolts 110a and 110b reach the other ends 205a and 205b. Wrap the deflector 200. As a result, the interference portions 204a and 204b interfere with the stud bolts 110a and 110b that are about to move from the other ends 205a and 205b, so that the deflector 200 can maintain the winding state. Thus, even with the configuration of the first modified example, the deflector 200 can be easily assembled to the inflator 104.

(Second modification)
FIG. 6 is a diagram illustrating a second modification of the deflector 106 of FIG. The deflector 300 illustrated in FIG. 6 is different from the above-described deflectors in the shape of both the first hole portions 302a and 302b and the second hole portions 304a and 304b. First, the second hole portions 304a and 304b are bent in the vicinity of the end portion on the first hole side (bent regions E1 and E2), and the whole is substantially L-shaped. Interference portions 306a and 306b are provided in the bent region E1. The first holes 302a and 302b have a long hole shape, and the long diameters R3 and R4 are provided so as to be substantially parallel to the bent regions E1 and E2.

  FIG. 7 is a diagram illustrating a process of attaching the deflector 300 of FIG. 6 to the inflator 104. First, as illustrated in FIG. 7A, the deflector 300 is connected to the first hole portions 302a and 302b and the second hole portions 304a and 304b in the same manner as the deflector 106 described with reference to FIG. Insert 110b and wind it around the inflator 104.

  Next, as illustrated in FIG. 7B, the stud bolts 110a and 110b are placed along the first holes 302a and 302b and the bent regions E1 and E2, and the deflector 300 is shifted upward in the drawing. Thereby, stud bolt 110a * 110b passes over interference part 306a * 306b, and it fits into edge part 305a * 305b of 2nd hole 304a * 304b. Even in the second modified example, the deflector 300 and the inflator 104 can be firmly assembled with a simple and inexpensive configuration so that the deflector 300 and the inflator 104 are not detached even when subjected to gas pressure.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings. However, the embodiments described above are preferred examples of the present invention, and other embodiments can be implemented or performed in various ways. Can be carried out. The invention is not limited to the detailed shape, size, configuration, and the like of the components shown in the accompanying drawings unless otherwise specified in the present specification. In addition, expressions and terms used in the present specification are for the purpose of explanation, and are not limited thereto unless otherwise specified.

  Therefore, it is obvious for those skilled in the art that various changes and modifications can be conceived within the scope of the claims, and these naturally belong to the technical scope of the present invention. It is understood.

  Moreover, in the said embodiment, the case where the gas supply apparatus 100 concerning this invention was applied to the side airbag 102 with which a motor vehicle is provided was demonstrated. However, the present invention can be applied to other types of airbags other than the side airbag 102, aircrafts and ships other than automobiles, and the same effects can be obtained.

  The present invention can be used for an airbag device mounted on a vehicle and a gas supply device for an airbag.

R1 ... inner diameter, R2 ... outer diameter, R3 · R4 ... long diameter, D1 ... direction, E1 · E2 ... bending region, S1 ... gap, 100 ... gas supply device, 102 ... side airbag, 104 ... inflator, 106 · 200 · DESCRIPTION OF SYMBOLS 300 ... Deflector, 108 ... Gas jet, 110a * 110b ... Stud bolt, 112 ... Connector, 114a * 114b ... 1st hole part, 116a * 116b * 202a * 202b * 304a * 304b ... 2nd hole part, 117a * 117b 305a, 305b ... end, 118a, 118b, 204a, 204b, 306a, 306b ... interference part, 202a, 202b ... one end, 205a, 205b ... the other end,

Claims (5)

A gas supply device that is attached to an airbag and supplies gas for inflation and deployment to the airbag,
A cylinder-type inflator having a gas outlet for jetting the gas on the outer surface;
A deflector made of a sheet metal, wound around the inflator with a gap between the inflator and covering at least the gas outlet,
The inflator further includes one or more stud bolts provided on the outer surface and fastened to the vehicle,
The deflector is
A substantially circular first hole through which the stud bolt is passed;
The stud bolt is provided at a position away from the first hole portion toward the winding end side of the deflector, and the stud bolt that is passed through the first hole portion is further passed through and is elongated along the direction in which the deflector is wound. A second hole,
The second hole portion is provided in the middle of the longitudinal direction in the vicinity of the end portion on the first hole side so as to narrow the width of the second hole portion , and interferes with a stud bolt that attempts to move from the end portion. the interference portion to possess,
The interference portion that prevents the movement from the end of the second hole portion of the stud bolt, a gas supply device, characterized that you have to hold the deflector in wound condition to the inflator.   2. The gas supply device according to claim 1, wherein the second hole portion is narrowed except for both ends of the second hole portion by providing the interference portion. The second hole is substantially L-shaped as a whole by bending a region near the end on the first hole side,
2. The gas supply device according to claim 1, wherein the first hole has a long hole shape having a long diameter substantially parallel to a bent region of the second hole. 4. The gas supply device according to claim 1, wherein an inner diameter of the deflector wound around the inflator is larger than an outer diameter of the inflator. 5. An airbag device comprising the gas supply device according to any one of claims 1 to 4 .

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