JP2011073642A - Air bag and air bag device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air bag for accurately performing desired inflating and deploying operation by easily and precisely positioning an inner panel to form an inner chamber, and to provide an air bag device. <P>SOLUTION: At least three connection ends 4b, 5b of the inner panel 4 and a connection panel 5 are provided at their corresponding peripheral positions and put one on the top of another so that the outer shapes of alignment index portions 13 of the connection ends 4b, 5b correspond to each other. The pairs of connection ends 4b, 5b are accurately positioned with each other. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an airbag and an airbag apparatus mounted on a vehicle such as an automobile, and more particularly to an airbag and an airbag apparatus provided with an inner chamber.

  2. Description of the Related Art It has become common to mount an airbag device on a vehicle such as an automobile to absorb an impact generated by an occupant by inflating and deploying the airbag in a vehicle at the time of a collision or sudden deceleration. As an airbag device, an airbag device for a driver's seat installed in a steering wheel, an airbag device for a passenger's seat installed in an instrument panel, a side airbag device installed in a side or seat of a vehicle, and installed in an upper part of a door Various types have been developed and adopted, such as a curtain airbag device, a knee airbag device corresponding to a knee of an occupant, and a pedestrian airbag device installed under a hood. Recently, airbags for motorcycles have also been developed.

  These airbag apparatuses generally include a gas generator that generates gas under a predetermined condition, an airbag that is connected to the gas generator and inflates and deploys, and a retainer that accommodates the airbag. Various types of airbag shapes and configurations are applied depending on conditions such as installation location and required functions.

  Conventionally, in order to regulate the overall shape when these airbags are inflated and deployed, a configuration in which one or a plurality of tethers are provided inside the airbag has been proposed. This tether is formed in a belt shape and is connected so as to be stretched between inner surfaces of two main body panels constituting the airbag main body when the airbag is inflated and deployed. At this time, for the convenience of manufacturing, one tether may be configured by connecting ends of two tethers connected to the inner surfaces of the two main body panels.

  In such a case, the same hole, protrusion shape, or notch shape is positioned at each overlapping position of the two tether end portions so that the one tether can be easily formed to an appropriate length. An air bag formed for this purpose has been proposed (see, for example, Patent Document 1).

Japanese National Patent Publication No. 7-508246

  Some recent airbags are provided with a small chamber called an inner chamber inside the airbag, and the inflator gas is first introduced into the inner chamber to inflate and deploy the airbag in stages. . In this airbag, the gas first flows into the inner chamber, and then the gas flows out of the inner chamber from the communication port formed on the outer peripheral side surface of the inner chamber so that the entire airbag is filled with the gas. The

  As a result, the central portion of the airbag provided with the inner chamber can be inflated and deployed before the outer peripheral portion of the airbag, and the airbag can be quickly protruded to quickly fill the gap with the occupant. In addition, since the expansion in the thickness direction is restricted at that time, the gas can then flow into the outer peripheral portion of the airbag and can be quickly expanded in the lateral direction. Generally, such an inner chamber is formed by providing an inner panel that partitions the inside of an airbag inside two main body panels.

  In order for an airbag having such an inner chamber to accurately perform a desired inflation and deployment operation, it is important to accurately form the volume of the inner chamber and the shape and size of the communication port. For this purpose, the inner panel needs to be accurately positioned and connected to the main body panel. However, since the inner panel is a wide flat base cloth, it is necessary to perform positioning at a plurality of locations. In particular, in consideration of forming a chamber having a predetermined volume with the main body panel, it is preferable to perform positioning at least at three or more locations.

  However, since the above prior art positions the belt-like tethers, positioning is performed only at one place. Even if positioning is performed for both ends of the tether, there are only two locations. For this reason, even if the above prior art is applied to the positioning of the inner panel, the inner panel cannot always be accurately positioned with respect to the main body panel.

  An object of the present invention is to provide an airbag and an airbag apparatus capable of accurately performing a desired inflation and deployment operation by easily and accurately positioning an inner panel for forming an inner chamber.

  In order to achieve the above object, the airbag of the first invention is formed in a bag body by sewing a front panel that is on the occupant side during inflation and deployment and a rear panel that is on the opposite side of the occupant side during inflation and deployment, In an airbag including an inner chamber therein, the inner chamber includes an inner panel connected to the front panel, a connection panel connected to the rear panel, and an inflow port through which gas is supplied at the center. Is formed by connecting at least three connection end portions provided to project radially outward at corresponding circumferential positions of the inner panel and the connection panel, respectively, Each of the connection end portions of the connection panel is connected to at least one of both edges in the width direction. What is characterized in that it has a positioning mark section has an external shape substantially coincident when the overlap at the right place.

  Thereby, in the operation of connecting the corresponding pair of connection end portions of the inner panel and the connection panel, by superimposing so as to match the outer shape of the alignment indicator portion formed on each connection end portion, The pair of connection end portions overlap with each other in an appropriate arrangement, and accurate positioning in the connection direction can be easily performed. Such positioning is performed for at least three connection end portions provided at the corresponding circumferential positions of the inner panel and the connection panel, so the inner panel is accurately connected to the connection panel connected to the rear panel side. Can be positioned. In this way, by connecting the inner panel and the connection panel with accurate positioning to form the inner chamber, the volume of the inner chamber and the shape and size of the communication port formed between the adjacent connection end portions Can be formed with high accuracy. As a result, it is possible to cause the airbag to accurately perform a desired inflation and deployment operation.

  The airbag according to a second aspect of the present invention is the airbag according to the first aspect, wherein the connection ends of the inner panel are positioned radially outward from the connection end of the connection panel when the inner chamber is inflated and deployed. It is characterized by being overlapped so as to be positioned and connected by stitching.

  As a result, in the connection portion between the connection end portions, the connection end portion of the inner panel flows in from the inflow port formed in the connection panel and becomes the resistance of the gas flow flowing from the connection panel side to the inner panel side. Can be prevented. As a result, the gas supplied from the gas generator can be smoothly introduced into the inner chamber.

  According to a third aspect of the present invention, in the first or second aspect of the invention, the alignment index portion is formed in an asymmetric shape with respect to the central position in the connection direction between the pair of connection end portions. Features.

  As a result, when the corresponding connection end portions of the inner panel and the connection panel are overlapped so that inappropriate surfaces come into contact with each other, the outer shape of the alignment indicator portion formed on each of them does not match. Such an error in connection work can be prevented.

  The airbag according to a fourth aspect of the present invention is the air bag according to any one of the first to third aspects, wherein at least three of the connection end portions provided on the inner panel and the connection panel are different in the circumferential position. The shape of the alignment index portion is different between the portions.

  Thereby, an inner panel and a connection panel can be connected with the connection end part of the combination which respond | corresponds correctly.

  The airbag of the fifth invention is the airbag according to the fourth invention, wherein at least one of the connection end portions provided on each of the inner panel and the connection panel is at least one of the other connection end portions. And the arrangement of radial distances are different.

  As a result, the connection ends of the combination corresponding to each other can be connected to each other, and the shape and size of the communication port formed between the adjacent connection portions can be easily and accurately formed for a plurality of variations.

  The airbag according to a sixth aspect of the present invention is the airbag according to the fourth or fifth aspect, wherein at least three of the connection end portions provided on each of the inner panel and the connection panel are between a pair of adjacent connection end portions. At least one of the circumferential arrangement interval angles is different from the other arrangement interval angles.

  As a result, the connection ends of the combination corresponding to each other can be connected to each other, and the shape and size of the communication port formed between the adjacent connection portions can be easily and accurately formed for a plurality of variations.

  In order to achieve the above object, according to a sixth aspect of the present invention, there is provided an airbag according to any one of the first to sixth aspects of the present invention, a retainer that accommodates the airbag, and a gas is ejected to inflate the airbag. And a gas generator.

  Thus, by connecting the inner panel and the connection panel with accurate positioning to form the inner chamber, the volume of the inner chamber and the shape and size of the communication port formed between the adjacent connection end portions can be reduced. It can be formed with high accuracy. As a result, it is possible to cause the airbag to accurately perform a desired inflation and deployment operation.

  According to the present invention, it is possible to cause the airbag to accurately perform a desired inflating and deploying operation by easily and accurately positioning the inner panel for forming the inner chamber.

It is a component expansion view which shows the airbag apparatus provided with the airbag by this invention. It is explanatory drawing of the inner panel and connection panel which comprise an inner chamber. It is explanatory drawing which shows the expansion | deployment operation | movement of an airbag apparatus. It is a figure explaining the detailed structure of each connection edge part of an inner panel and a connection panel, and those connection structures. It is a figure explaining the detailed structure of the modification of each connection edge part of an inner panel and a connection panel. It is explanatory drawing of the inner panel and connection panel of the modification from which the radial direction distance of arrangement | positioning of a connection edge part differs. It is explanatory drawing of the inner panel and connection panel of a modification from which the arrangement | positioning space | interval angle between adjacent connection edge parts differs.

  An airbag apparatus provided with an embodiment of an airbag according to the present invention will be described with reference to FIGS. Here, FIG. 1 is a part development view showing the airbag apparatus of the present embodiment. 2 is an explanatory view of an inner panel and a connection panel constituting the inner chamber. FIG. 2 (a) is a plan development view of the inner panel, and FIG. 2 (b) is a plan development view of the connection panel. In addition, this embodiment has shown the example which applied this invention to the driver's airbag installed in a driver's seat. Further, FIGS. 2A and 2B show the airbag front panel and rear panel in a state of being coaxially overlapped as a reference for facilitating the comparison of the sizes.

  An airbag apparatus 100 according to this embodiment shown in FIG. 1 includes a gas generator 1 that generates gas under predetermined conditions, an airbag 2 that is inflated and deployed by gas supplied from the gas generator 1, and an airbag 2 And a retainer 3 for housing the container. The airbag 2 includes an inner panel 4 disposed inside and a connection panel 5 having a smaller area than the inner panel 4. The inner panel 4 has a plurality of (three in the illustrated example) connections connected to a central stitching portion 4a connected to the inner surface of the front panel 2a described later and a connection panel 5 disposed on the inner surface of the rear panel 2b described later. And an end 4b. Further, the inner panel 4 is formed in a substantially triangular shape as a whole, with the outer shape between two adjacent connection end portions 4b when being developed in a plane being linear. The airbag 2 is fixed to the retainer 3 via a presser ring 6.

  The gas generator 1 is a component generally referred to as an inflator, and a gas outlet 1c is formed at a tip end included in the airbag 2. Moreover, the gas generator 1 has a flange portion 1a at an intermediate portion, and a plurality of (four in the illustrated example) bolt holes 1b are formed in the flange portion 1a. The gas generator 1 having such a configuration is connected to an ECU (electronic control unit) (not shown) and is controlled based on measurement values of an acceleration sensor or the like. When the ECU senses or predicts a vehicle collision or sudden deceleration, the gas generator 1 is ignited by an ignition current from the ECU, burns a chemical stored in the gas generator 1 to generate gas, and an air bag. 2 is supplied with gas.

  The airbag 2 includes a front panel 2a that is on the occupant side when inflated and deployed, and a rear panel 2b that is on the side of the vehicle body structure opposite to the occupant when inflated and deployed. The front panel 2a is in contact with and restrained by the occupant's body, and the rear panel 2b is arranged to face the front panel 2a. Each of the front panel 2a and the rear panel 2b has a substantially disk shape, and the peripheral portions thereof are stitched to form a bag body. An opening 2c for guiding the gas generator 1 to the inside of the airbag 2 is formed at the center of the rear panel 2b. A plurality of (four in the illustrated example) are provided around the opening 2c. ) Bolt holes 2d. In the rear panel 2b, a vent hole (not shown) for exhausting the gas in the airbag 2 may be formed.

  The retainer 3 has a box shape, and an opening 3 a for guiding the gas generator 1 to the inside of the airbag 2 is formed at the center of the bottom. A plurality (four in the illustrated example) of bolt holes 3b are formed around the opening 3a. The retainer 3 has various shapes. For example, the side surface portion and the bottom portion of the retainer 3 may be formed of different members. In this case, the bottom part may be referred to as a retainer and the side part may be referred to as a module cover. Here, these are collectively referred to as a retainer. That is, the retainer 3 is a general term for a member that fixes the gas generator 1 and the airbag 2 and a member that stores the airbag 2.

  The inner panel 4 is a member constituting an inner chamber 10 which will be described later together with the connection panel 5 when the airbag 2 is inflated and deployed. The central stitching portion 4a is connected to the front panel 2a and the connection end portion 4b is connected. The panel 5 is connected to the rear panel 2b. In the present embodiment, three connection end portions 4b are provided on the outer periphery of the inner panel 4 so as to protrude outward in the radial direction. These three connection end portions 4b are arranged so that the radial distances from the center position of the inner panel 4 are the same and are equally spaced in the circumferential direction. The inner panel 4 in the present embodiment shown in FIGS. 1 and 2A is generally formed in a substantially triangular shape, but is not limited to such a shape. For example, the connection end 4b It is good also as a substantially circular shape as a circular arc shape which swelled outside the outer shape in between.

  The connection panel 5 is a member that forms an inner chamber 10 that will be described later together with the inner panel 4 when the airbag 2 is inflated and deployed, and is a member that connects the airbag 2 and the inner panel 4. The connection panel 5 includes a central stitching portion 5a connected to the rear panel 2b and a plurality (three in the illustrated example) of connection end portions 5b connected to the connection end portion 4b of the inner panel 4. In addition, an inflow port 5c for guiding the gas generator 1 to the inside of the airbag 2 is formed in the central portion of the connection panel 5. A plurality of (in the illustrated example, 4 in the illustrated example). Bolt holes 5d. The connection panel 5 is formed in a smaller shape than the inner panel 4 so that the inner panel 4 can be easily stitched to the airbag 2. The three connection end portions 5b have the same radial distance from the center position of the connection panel 5, and are arranged at equal intervals in the circumferential direction. The connection panel 5 in the present embodiment shown in FIGS. 1 and 2B is formed in a substantially circular shape as a whole, but is not limited to this shape.

  The inner panel 4 and the connection panel 5 have an inner surface (lower surface in FIG. 1) of the connection end 4b of the inner panel 4 and an outer surface (lower surface in FIG. 1) of the connection end 5b of the connection panel 5. The connection is made by stitching at the connecting portion 12 superimposed so as to be in contact with the surface (see FIG. 4 described later). The inner panel 4, the connection panel 5, the front panel 2a, and the rear panel 2b are each composed of cut parts obtained by cutting a base fabric in a predetermined shape.

  The presser ring 6 is a member that fixes the airbag 2 and the connection panel 5 to the retainer 3. An opening 6a for guiding the gas generator 1 to the inside of the airbag 2 is formed at the center of the presser ring 6, and a plurality of (four in the illustrated example) are provided around the opening 6a. Bolt holes (not shown) are formed, and bolts 6b are inserted into the respective bolt holes. The bolt 6b is inserted through the bolt hole 5d of the connection panel 5, the bolt hole 2d of the rear panel 2b, the bolt hole 3b of the retainer 3, and the bolt hole 1b of the gas generator 1 in this order, and finally fastened to the nut 6c.

  Next, an inflating and deploying operation of the airbag device 100 of the present embodiment will be described. Here, FIG. 3 is an explanatory view showing the inflating and deploying operation of the airbag apparatus 100 of the present embodiment, where FIG. 3A is the initial stage of inflation of the airbag 2, and FIG. 3B is the inflation of the airbag 2. In the middle period, FIG. 3C shows the end of inflation of the airbag 2. In each figure, the arrow in the figure indicates the direction of gas flow.

  When the gas generator 1 is activated by a command from the ECU, gas is supplied into the airbag 2. In the initial stage of inflation of the airbag 2, as shown in FIG. 3A, gas is intensively supplied to the inner chamber 10 formed first by the inner panel 4 and the connection panel 5 connected thereto. Is done. As a result, the vicinity of the central portion of the airbag 2 provided with the inner chamber 10 is inflated and deployed before the outer peripheral portion of the airbag 2, and the airbag 2 is quickly projected to quickly fill the gap with the occupant. Can do. At this time, the airbag 2 is inflated and deployed in a substantially spherical shape. Further, since the inner panel 4 and the connection panel 5 connect the respective central portions of the front panel 2a and the rear panel 2b, the initial amount of protrusion in the inflating and expanding direction (the amount of protrusion in the direction toward the occupant side) can be obtained. Can be regulated.

  As shown in FIG. 3 (b), in the middle stage of inflation of the airbag 2, gas flows out of the inner panel 4 from the communication port 11 formed between two adjacent connection end portions 4 b of the inner panel 4. The outer peripheral portion of the airbag 2 is inflated and deployed in the lateral width direction and gradually inflated and deployed in the thickness direction. Then, as shown in FIG. 3C, at the end of inflation of the airbag 2, the airbag 2 is inflated and deployed in the thickness direction as a whole. In the example of the present embodiment, three communication ports 11 are formed on the outer peripheral side surface of the inner chamber 10.

  In order for the airbag 2 to accurately perform the stepwise inflating and deploying operation as described above, the volume of the inner chamber 10 formed by the inner panel 4 and the connection panel 5 and the shape and size of the communication port 11 are described. It is important to accurately form the thickness. For this reason, the airbag 2 of the present embodiment is configured such that the connection end portions 4b and 5b of the inner panel 4 and the connection panel 5 can be easily and accurately positioned and connected.

  Next, the connection configuration of the inner panel 4 and the connection panel 5 will be described in detail with reference to FIG.

  FIG. 4 is a diagram illustrating the detailed configuration of the connection end portions 4b and 5b of the inner panel 4 and the connection panel 5, and the connection configuration thereof. 4A is a diagram showing the detailed configuration of each of the connection end 4b of the inner panel 4 and the connection end 5b of the connection panel 5, and FIG. 4B shows the two connection ends 4b and 5b. FIG. 4C is a diagram illustrating a configuration of the connection portion 12 in a connected state, and FIG. 4C is a diagram illustrating a cross section of the connection portion 12 along a IVc-IVc cross section in FIG.

  First, in FIG. 4A, a state in which the inner panel 4 and the connection panel 5 are arranged in parallel and apart from each other is shown in perspective. Three connection end portions 4b and 5b are arranged at the corresponding circumferential positions of the inner panel 4 and the connection panel 5, respectively, and a pair of connection end portions 4b and 5b arranged opposite to each other are folded and shown close to each other. Yes. Both connection end portions 4b and 5b are formed in a substantially rectangular shape having the same length dimension with respect to the width direction orthogonal to the connection direction D (direction close to each other), and the width orthogonal to the connection direction D. Alignment indicator portions 13 are formed at the edge portions on both sides in the direction.

  In the example of the present embodiment, the alignment indicator portions 13 formed on the both edge portions of both connection end portions 4b and 5b are both symmetrical with respect to the center position in the connection direction D. And it is formed in the substantially semicircle shape which protrudes from an edge part with the curvature radius of the same magnitude | size. That is, in the pair of connection ends 4b and 5b, the combination alignment indicator portions 13 arranged on the same side in the width direction orthogonal to the connection direction D are formed in the same outer shape.

  When both the connection end portions 4b and 5b are positioned and overlap with each other in an appropriate arrangement, as shown in FIG. 4 (b), the combination of the alignment indicator portions 13 arranged on the same side The outer shape matches. And the part which suture-joined in this overlapping area | region becomes the connection part 12 of the said pair of connection edge part 4b, 5b.

  As shown in FIGS. 4B and 4C, in the connection portion 12, the inner surface of the connection end portion 4b of the inner panel 4 (the rear surface in FIG. 4B, FIG. c) is superposed so as to be in contact with the outer surface of the connection end 5b of the connection panel 5 (the front surface in FIG. 4B, the left surface in FIG. 4C). . That is, as shown in FIG. 4C, when the inner chamber 10 is in an expanded and deployed state, the connection end 4b of the inner panel 4 is overlapped and stitched so as to be positioned radially outward from the connection end 5b of the connection panel 5. Will be connected.

  According to the airbag device 100 of the present embodiment having the configuration described above, the following effects can be obtained.

  That is, in the airbag 2 provided in the airbag device 100 of the present embodiment, in the operation of connecting the corresponding pair of connection end portions 4b, 5b of the inner panel 4 and the connection panel 5, each connection end portion 4b. , 5b are overlapped so that the outer shapes of the alignment indicator portions 13 are made to coincide with each other, so that the pair of connection end portions 4b, 5b overlap with each other in an appropriate arrangement, and accurate positioning in the connection direction is facilitated. Yes. And since such positioning is performed about the at least 3 connection edge part 4b, 5b provided in the circumferential direction position of each of the inner panel 4 and the connection panel 5, the inner panel 4 is connected to the rear panel 2b side. It is possible to accurately position the connection panel 5. In this way, by connecting the inner panel 4 and the connection panel 5 with accurate positioning to form the inner chamber 10, the volume of the inner chamber 10 and the communication formed between the adjacent connection ends 4 b are formed. The shape and size of the mouth 11 can be formed with high accuracy. As a result, it is possible to cause the airbag 2 to accurately perform a desired inflation and deployment operation.

  Further, in the airbag 2 of the present embodiment, the connection ends 4 b and 5 b are arranged such that the connection end 4 b of the inner panel 4 is more radial than the connection end 5 b of the connection panel 5 when the inner chamber 10 is inflated and deployed. They are connected by stitching so as to be located outside. Thereby, in the connection part 12, the connection edge part 4b of the inner panel 4 flows in from the inflow port 5c formed in the connection panel 5, and becomes resistance of the flow of the gas which flows from the connection panel 5 side to the inner panel 4 side. Can be prevented. As a result, the gas supplied from the gas generator 1 can be smoothly introduced into the inner chamber 10.

  In addition, although the inner panel 4 and the connection panel 5 of the airbag 2 in this embodiment set it as the structure which provided the connection end parts 4b and 5b 3 each, this invention is not limited to this, 4 or more each is provided. It is good also as a structure. Further, the alignment indicator 13 of each connection end 4b, 5b may be provided only at the edge on one side in the width direction between the corresponding pair of connection ends 4b, 5b. The shape of the alignment indicator 13 is not limited to the substantially semicircular shape described above, and may be, for example, a triangular shape or a quadrangular shape, and is not limited to the shape protruding from the edge of the connection end portions 4b and 5b. It is good also as recessed parts, such as.

  Further, the alignment indicator 13 at each connection end 4b, 5b of the airbag 2 in the present embodiment has a substantially semicircular shape symmetrical with respect to the center position in the connection direction D between the pair of connection ends 4b, 5b. However, the present invention is not limited to this, and may be formed in an asymmetric shape with respect to the center position in the connection direction D, for example.

  Specifically, as shown in FIG. 5, the alignment indicator portion 13 ′ may be formed in a right triangle shape, for example. In this case, it is necessary to form so that the outer shapes substantially coincide when the corresponding pair of connection end portions 4b and 5b overlap with each other in an appropriate arrangement. In the illustrated example, in the connection end 4b on the inner panel 4 side, the alignment indicator portions 13 'on both edges are formed so that the width increases from the outer peripheral side to the inner peripheral side of the inner panel 4. On the contrary, in the connection end 5b on the connection panel 5 side, the alignment indicator portions 13 'on both edges are formed in such a direction that the width increases from the inner peripheral side to the outer peripheral side of the connection panel 5. Has been.

  As a result, when the corresponding connection end portions 4b and 5b of the inner panel 4 and the connection panel 5 are overlapped with each other so that inappropriate surfaces come into contact with each other by mistake (for example, the surface on the back side of each sheet in FIG. 5). In the case where they are brought into contact with each other and the like, the outer shape of the alignment indicator portion 13 'formed on each of them does not match, so that it is possible to prevent such an error in connection work.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit and technical idea thereof. Hereinafter, such modifications will be described.

(1) When the arrangement | positioning aspect of each connection edge part in each of an inner panel or a connection panel differs In the said embodiment, each connection edge part 4b, 5b in each of the inner panel 4 and the connection panel 5 is from panel center position. Although the case where the radial distances are the same and the circumferential distances are arranged at equal intervals, that is, the case where the connecting end portions 4b and 5b are uniformly arranged has been described as an example, the present invention is not limited thereto. Instead, the arrangement of the connection end portions 4b and 5b may be different.

  FIG. 6 is an explanatory diagram of the inner panel 4A and the connection panel 5A constituting the inner chamber 10 of the airbag 2A provided in the airbag device 100A of the present modification, and corresponds to FIG. 2 in the above embodiment.

  In FIG. 6A, connection end portions 4b are provided at three locations on the outer periphery of the inner panel 4A. Although these connection end parts 4b are arranged at equal intervals in the circumferential direction, only the radial distance R41 from the panel center position of the connection end part 4b located in the upper part in the figure is the other two connections. It is shorter than the radial distances R42 and R43 of the end 4b. In the connection panel 5A in FIG. 6B, as in FIG. 2B, the three connection end portions 5b on the outer periphery have the same radial distances R51, R52, and R53 from the panel center position. And it arrange | positions at equal intervals in the circumferential direction.

  In the inner panel 4A and the connection panel 5A, the outer shapes of the alignment indicator portions 13, 13a, 13b are the same in the corresponding combinations of the connection end portions 4b, 5b, but they are not compatible. The outer shape of the alignment indicator portions 13, 13a, 13b differs between the combinations. In the example shown in the figure, the alignment indicator portions 13 of the connection end portions 4b and 5b located on the upper side are formed in the same shape as in the above embodiment, corresponding to each of the inner panel 4A and the connection panel 5A. The alignment indicator portions 13a of the connection ends 4b and 5b located on the lower left side are formed to be recessed in a substantially semicircular shape having the same radius of curvature at both edges, and the connection end portion 4b located on the lower right side. , 5b is formed such that a rectangular shape of the same size protrudes from both edges. For this reason, it is possible to easily distinguish the corresponding correct combination between the connection ends 4b and 5b provided with three inner panels 4A and three connection panels 5A.

  According to this modified example configured as described above, the inner panel 4A and the connection panel 5A can be connected to each other by the connection end portions 4b and 5b of the combination corresponding to each other.

  In this modification, the inner panel 4A and the connection panel 5A have one radial distance R41 of the three connection end portions 4b and 5b provided in each of the other connection end portions 4b and 5b. The configuration is different from the radial distances R42 and R43. Thereby, the shape and size of the communication port 11 formed between the adjacent connection portions 12 can be easily and accurately formed for a plurality of variations by connecting the connection ends 4b and 5b of the corresponding combinations correctly. can do.

  That is, in the case of the inner chamber 10 formed by connecting the inner panel 4A and the connection panel 5A in the example shown in FIG. 6, two communication ports adjacent to the connection end portions 4b and 5b located in the upper part in the figure. 11 has a relatively smaller shape than the other one communication port 11, that is, the flow rate of the air bag 2 </ b> A is increased in only one direction by increasing the amount of gas outflow only by one communication port 11. be able to. Thereby, for example, by arranging one corresponding direction toward the lower side of the vehicle, the airbag 2A can be deployed relatively quickly in the direction toward the abdomen of the occupant.

  In addition, as shown in FIG. 7 corresponding to the above FIG. 6, the radial distances from the panel center positions of the connection end portions 4b and 5b in the inner panel 4B and the connection panel 5B are the same. Even when the circumferential arrangement interval angles L41, L42, and L43; L51, L52, and L53 between the pair of matching connection ends 4b and 5b are different, the alignment indicator portions 13, 13a, and 13b are the same as described above. The same effect can be obtained by forming the film.

  That is, the inner panel 4B and the connection panel 5B are different in the shape of the alignment indicator portions 13, 13a and 13b between the three connection end portions 4b and 5b provided in the inner panel 4B and the connection panel 5B, respectively. Can be connected to each other between the connection ends 4b and 5b of a combination corresponding to each other.

  The inner panel 4B and the connection panel 5B each have one circumferential arrangement interval angle L42 between a pair of adjacent connection end portions 4b, 5b among the three connection end portions 4b, 5b provided on the inner panel 4B and the connection panel 5B, respectively. L52 is different from other arrangement interval angles L41, L43; L51, L53, so that the connection ends 4b, 5b of the combination corresponding to each other are connected to each other and formed between the adjacent connection portions 12; The shape and size of the mouth 11 can be easily and accurately formed for a plurality of variations.

  That is, in the case of the inner chamber 10 formed by connecting the inner panel 4B and the connection panel 5B in the example shown in FIG. 7, the communication port 11 corresponding to the arrangement interval angle L42; The shape of the airbag 2B is relatively larger than that of the other two communication ports 11, that is, the lateral flow rate of the airbag 2B can be increased only in one direction by relatively increasing the gas outflow amount by one communication port 11. it can.

  The specific configuration of the above-described embodiment does not strictly limit the contents of the present invention, and it is needless to say that details can be variously changed in accordance with the spirit of the present invention.

1 Gas Generator 2 Airbag 2a Front Panel 2b Rear Panel 3 Retainer 4, 4A, 4B Inner Panel 4b Connection End 5, 5A, 5B Connection Panel 5b Connection End 5c Inlet 6 Presser Ring 10 Inner Chamber 11 Communication Port 12 Connection Part 13, 13a, 13b, 13 'Positioning indicator part 100 Airbag device D Connection direction R41, R42, R43 Radial distance R51, R52, R53 Radial distance L41, L42, L43 Arrangement interval angle L51, L52, L53 Arrangement Spacing angle

Claims (7)

In an airbag that is formed into a bag body by sewing a front panel that becomes an occupant side during inflation and deployment and a rear panel that is opposite to the occupant side during inflation and deployment, and includes an inner chamber therein,
The inner chamber is
An inner panel connected to the front panel, and a connection panel connected to the rear panel and formed with an inflow port to which gas is supplied at a central portion, respectively, corresponding circumferential directions of the inner panel and the connection panel, respectively. It is formed by connecting at least three connection end portions provided projecting radially outward at the positions,
The connection end portions of the inner panel and the connection panel are respectively
An air that has an alignment indicator portion whose outer shape substantially matches when the connection end portions connected to each other overlap each other at an appropriate position on at least one of both edges in the width direction. bag. The connection ends are
The connection end portion of the inner panel is overlapped and stitched so as to be positioned radially outward from the connection end portion of the connection panel when the inner chamber is inflated and deployed. Airbag. The alignment indicator portion is
The airbag according to claim 1 or 2, wherein the airbag is formed in an asymmetric shape with respect to a central position in a connection direction between the connection end portions. The at least three connection end portions provided on each of the inner panel and the connection panel are different in shape of the alignment index portion between the connection end portions having different circumferential positions. Item 4. The airbag according to any one of Items 1 to 3.   The at least three of the connection end portions provided on each of the inner panel and the connection panel are different from each other in the arrangement of radial distances from the other connection end portions. Item 5. The airbag according to Item 4.   At least one of the connection end portions provided on each of the inner panel and the connection panel has at least one circumferential arrangement interval angle between a pair of adjacent connection end portions, the other arrangement interval angle. The airbag according to claim 4, wherein the airbag is different from the airbag. The airbag according to any one of claims 1 to 6;
A retainer for housing the airbag;
An air bag apparatus comprising: a gas generator that injects gas to inflate the air bag.

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