Airbag device for vehicle
By designing a concave structure and tie-up combination on the airbag cushion of the vehicle airbag device, the problem of occupant head rotation is solved, efficient constraints and lightweight materials are achieved, and cost is reduced.
Patent Information
- Application Number
- CN202380041145.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2022-05-27
- Filing Date
- 2023-05-01
- Publication Date
- 2024-12-27
AI Technical Summary
When a vehicle collides in an oblique direction, the occupant's head is prone to rotate, resulting in damage to the body. It is difficult for existing airbag devices to effectively suppress this rotation and provide efficient constraints.
A vehicle airbag device is designed, and the airbag cushion forms a recess in the center of the constraint surface. Through a combined structure of a plurality of sub-panels and a lace, a narrow side panel and a recessed confinement surface are formed, and the recess is tightened by the lace. To suppress head rotation, and to achieve lightweight and low cost through the tight connection between the inflator and the airbag cushion.
Effectively suppress the head rotation of the occupant, reduce the damage value, and at the same time reduce the material usage and the yield rate, the airbag cushion can be folded and stored more compactly, reducing costs.
Smart Images
Figure CN119212893A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a vehicle safety airbag device for restraining passengers in emergency situations. Background Art
[0002] In recent years, vehicles are basically equipped with airbag devices as standard. For example, many vehicles are equipped with driver airbags on the steering wheel. The airbag cushion of the driver airbag is mainly accommodated in the central part of the steering wheel, and its expansion pressure causes the resin cover to rupture and expand in front of the occupant.
[0003] The inventors of the present application have focused on the fact that the rotation of the head of an occupant easily puts a burden on the body due to the human body structure, and have developed an airbag cushion that can efficiently restrain the head of an occupant while suppressing the rotation of the head of the occupant.
[0004] For example, in the case of an oblique collision that is tilted relative to the direction of travel, it is known that the occupant enters the airbag cushion at an angle, and the head is likely to rotate. Figure 2 As disclosed, a technique has been developed to form a recessed portion 120 using an inner tether 122 in the center of the passenger side of the airbag cushion 104 .
[0005] Prior art literature
[0006] Patent Literature
[0007] Patent Document 1: Japanese Patent Publication No. 2020-37382 Summary of the invention
[0008] Problem that the invention aims to solve
[0009] In the technology of Patent Document 1, the central base fabric 118 and a total of three inner ties 122 are used to form the recessed portion 120. Currently, technology for more effectively forming the recessed portion is also being developed.
[0010] The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle airbag device capable of suppressing the injury level of an occupant with a simple structure.
[0011] Solutions to the problem
[0012] In order to solve the above-mentioned problems, the representative structure of the vehicle airbag device involved in the present invention is a vehicle airbag device, which comprises: an airbag cushion, which inflates and deploys between a structure in a vehicle cabin and an occupant sitting on a seat in an emergency; an inflator, which is arranged on the structure, and is characterized in that the airbag cushion comprises: a bottom surface on the structure side; a restraint surface on the occupant side; a side surface connecting the bottom surface and the restraint surface; a recessed portion, which is formed by being recessed in the direction of the bottom surface within a specified range in the center of the restraint surface, and the range from the side surface to at least a part of the restraint surface is formed by a specified side panel, and the side panel includes a plurality of sub-panels divided along the circumferential direction of the side surface, and the plurality of sub-panels respectively have a pair of side edges joined to adjacent sub-panels, one side on the restraint surface side, and the other side on the bottom surface side, and one side is shorter than the other side.
[0013] According to the above structure, since the recessed portion is formed in the center of the restraint surface, when the occupant enters the airbag cushion obliquely due to an oblique collision, for example, the rotation of the head can be suppressed compared to the case where the occupant is restrained only by a flat surface. Therefore, according to the above structure, the driver can be restrained while further suppressing the damage value.
[0014] In addition, in the above structure, since one side of the restraining surface side of the sub-panel is shorter than the other side of the bottom surface side, when the side sides of the sub-panels are connected to form the side panel, the side panel has a narrow shape on the restraining surface side. According to this side panel, a recess can be efficiently formed on the restraining surface. In addition, if it is this side panel, since the structure is simple, the amount of material used can be suppressed, so it can also achieve lightweight and low cost due to the improvement of material yield, and further, the airbag cushion can be folded and stored more compactly.
[0015] The sub-panel may have a concave portion extending from the side surface to the restraining surface.
[0016] According to the above configuration, it is also possible to form an airbag cushion having a recessed portion on the restraint surface.
[0017] The plurality of sub-panels may be joined to each other by sewing with adjacent sub-panels.
[0018] According to the above configuration, it is also possible to form an airbag cushion having a recessed portion on the restraint surface.
[0019] The bottom surface of the airbag cushion is formed by a predetermined bottom surface side panel, and the other side may be joined to the edge of the bottom surface side panel.
[0020] According to the above configuration, it is also possible to form an airbag cushion having a recessed portion on the restraint surface.
[0021] A portion of the inflator passes through the bottom side panel and is inserted into the airbag cushion, and the airbag cushion may further include a tether for tightening the recessed portion toward the inflator.
[0022] According to the above configuration, by tightening the recessed portion with the tie, the recessed portion can be efficiently formed and maintained.
[0023] The mid-bottom of the concave portion of the airbag cushion is formed by a predetermined central panel, one side of which is joined to the edge of the central panel, and the tether can be laid between the central panel and the inflator or at a predetermined position around the inflator.
[0024] According to the above configuration, by tightening the center panel with the tether, the recessed portion in a concave shape can be efficiently formed and maintained.
[0025] The structure may be a steering wheel of a vehicle, the inflator is disposed in a portion near the center of the steering wheel, and the airbag cushion may be rolled or folded and accommodated in the portion near the center.
[0026] According to the above structure, the driver airbag can be realized to appropriately restrain the driver.
[0027] The pair of side edges of the sub-panel may be configured to be curved and protruded in directions away from each other. According to this configuration, by connecting the side edges of the sub-panel, a side panel having a narrow shape on the restraining surface side can be preferably formed.
[0028] The other side of the sub-panel may be the widest. According to this configuration, by connecting the side sides of the sub-panels, a side panel having a narrow shape on the restraint surface side can be preferably formed.
[0029] The sub-panel may have a widest middle portion formed between the other side and the one side. According to this structure, by connecting the side sides of the sub-panel to each other, a side panel having a narrow shape on the restraining surface side can be preferably formed.
[0030] Effects of the Invention
[0031] According to the present invention, it is possible to provide a vehicle airbag device capable of suppressing the injury level of an occupant with a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] Figure 1 It is a diagram schematically illustrating a vehicle airbag device according to an embodiment of the present invention.
[0033] Figure 2 It is shown from all directions Figure 1 (b) is a diagram of the airbag cushion during inflation and deployment.
[0034] Figure 3 This is an example of the structure Figure 2 (a) is a diagram of the panels of the airbag cushion.
[0035] Figure 4 This is an example showing Figure 3(b) is a diagram showing the state of each panel being unfolded on a plane.
[0036] Figure 5 yes Figure 1 (b) are cross-sectional views of the airbag cushion.
[0037] Figure 6 This is an example showing Figure 1 (b) is a diagram showing the process by which the airbag cushion restrains the driver during an oblique collision.
[0038] Figure 7 yes Figure 4 (d) A modified example of the sub-panel shown as an example. DETAILED DESCRIPTION
[0039] Hereinafter, the 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 above embodiments are merely examples for facilitating the understanding of the invention, and do not limit the present invention unless otherwise specified. In addition, in this specification and the accompanying drawings, for elements having substantially the same function and structure, repeated descriptions are omitted by marking the same reference numerals, and elements that are not directly related to the present invention are omitted from the drawings.
[0040] Figure 1 1 is a diagram schematically illustrating a vehicle airbag device (hereinafter referred to as an airbag device 100 ) according to an embodiment of the present invention. Figure 1 (a) is a diagram showing an example of a state before the airbag device 100 is moved. Figure 1 As shown in (b), the airbag device 100 is implemented as a driver's airbag for a front left driver's seat 102 of a left-hand drive vehicle.
[0041] In this embodiment, the driver 166 (refer to Figure 6 (a)) When the driver 166 sits on the driver's seat 102 in a normal posture, the direction the driver 166 is facing is called the front, and the opposite direction is called the rear, which is called the front-back direction when the coordinate axis is represented. In addition, when the driver 166 sits on the driver's seat 102 in a normal posture, the right side of the driver 166 is called the right direction, and the left side of the driver 166 is called the left direction, which is called the left-right direction when the coordinate axis is represented. Furthermore, when the driver 166 sits in a normal posture, the direction of the driver's 166's head is called the top, and the direction of the driver's 166's waist is called the bottom, which is called the up-down direction when the coordinate axis is represented.
[0042] In the drawings used in the description of the embodiments of the present invention, arrows F (Forward), B (Back), L (Left), R (Right), U (up), and D (down) are used to indicate the direction of the driver 166 (see FIG. Figure 6 (a)) is the front, back, left, right, up and down directions.
[0043] Figure 1 In the case of an emergency, the airbag device 100 shown in (a) expands and deploys the airbag cushion 104 between the structure of the vehicle cabin and the driver sitting on the seat, protecting the driver from contact with the structure. As described above, in this embodiment, the airbag device 100 is implemented as a driver airbag, and the airbag cushion 104 is used for the driver 166 (refer to Figure 6 (c)) restrains the driver 166 to protect him from contacting the steering wheel 106 or flying out of the windshield, etc.
[0044] The airbag cushion 104 is a bag-shaped member that can be expanded by gas, and is formed into a small storage form by rolling or folding, and is connected to the inflator 112 (see Figure 5 ) are stored together in a storage portion 110 provided near the center of the steering wheel 106.
[0045] The storage portion 110 is provided at the center side of the rim 108 of the steering wheel 106. The storage portion 110 has a groove-shaped tear line or the like provided inside the resin cover on the surface, and serves as a seal between the airbag cushion 104 (see Figure 1 (b)) The cracked structure during expansion and unfolding.
[0046] Figure 1 (b) is a diagram showing an example of a state in which the airbag device 100 is movable. The airbag cushion 104 is inflated by the inflator 112 (see Figure 5 ) of the gas expands and causes the cover of the storage portion 110 to rupture, while simultaneously sending pressure to the driver 166 (refer to Figure 6 ) inflates and deploys to restrain the upper body and head of the driver 166 who wants to move forward.
[0047] The airbag cushion 104 has a circular shape when viewed from the driver's seat side, and is inflated and deployed into a shape having a concave portion 120 formed at the center. The airbag cushion 104 is formed by sewing or bonding a plurality of panels constituting the surface thereof.
[0048] Figure 2 It is shown from all directions Figure 1 (b) is a diagram of the airbag cushion 104 when inflated and deployed. Figure 2 (a) shows an example of a vehicle viewed from slightly above the outside of the vehicle. Figure 1(b) is an example of observing the airbag cushion 104.
[0049] The airbag cushion 104 expands and deploys into a shape that is approximately cylindrical with a rounded shape. The surface of the airbag cushion 104 is roughly divided into a steering wheel 106 (see Figure 1 (a)) is formed by a bottom surface 114 on the passenger side, a restraint surface 116 on the passenger side, and a side surface 118 connecting the bottom surface 114 and the restraint surface 116 .
[0050] The airbag cushion 104 has a recessed portion 120 as a characteristic portion at the center of the restraint surface 116. Figure 6 As shown, the recess 120 is used to inhibit rotation of the head 168 of the driver 166 when restraining the occupant.
[0051] The recessed portion 120 is formed by tightening a panel forming the restraint surface 116 of the airbag cushion 104 toward the bottom surface 114 using a tether 122 provided inside the airbag cushion 104 .
[0052] Figure 2 (b) Exposure and illustration Figure 2 (a) is a diagram of the tether 122. The tether 122 is a belt-shaped component, and a total of three tethers are provided (a first tether 122a, a second tether 122b, and a third tether 122c). One end of the tether 122 is connected to the center panel 130 on the restraint surface side inside the airbag cushion 104, and the other end is connected to the opposite side, that is, the bottom surface 114 side inside the airbag cushion 104.
[0053] Figure 3 This is an example of the structure Figure 2 (a) is a diagram of each panel of the airbag cushion 104. Figure 3 (a) is decomposed Figure 2 (a) is a diagram of a panel of the airbag cushion 104.
[0054] The bottom surface 114 of the airbag cushion 104 is formed by the bottom side panel 124. The inner panel 126 is arranged to overlap with the bottom side panel 124 inside the airbag cushion 104, and the tether 122 is connected thereto.
[0055] The composite panel 128 is a panel in which the tie 122 and the center panel 130 are integrated. The center panel 130 is disposed on the restraint surface 116 (see Figure 2 (a)) forms the portion of the midsole of the recess 120 in the center. The lace 122 extends from the center panel 130 in three strands and is joined to the inner panel 126.
[0056] The side panel 132 is a panel that forms the range from the side surface 118 to the inner wall of the recessed portion 120 of the restraining surface 116 , and is joined to the bottom side panel 124 and the center panel 130 .
[0057] Figure 3 (b) shows Figure 3 (a) is a diagram showing a state where each panel is expanded.
[0058] The side panel 132 is formed by a plurality of sub-panels 132a to 132c divided in the circumferential direction of the side surface 118. In the present embodiment, the side panel 132 is formed by combining three sub-panels 132a to 132c. The sub-panels 132a to 132c are polygonal structures. The sub-panels 132a to 132c form the range from the side surface 118 of the airbag cushion 104 to the inner wall of the concave portion 120 of the restraint surface 116.
[0059] Figure 4 It shows Figure 3 (b) is a diagram showing the state of each panel being unfolded on a plane. Figure 4 (a) shows an example Figure 3 (b) The bottom panel 124.
[0060] The bottom side panel 124 is circular and is formed to extend from the steering wheel 106 (see FIG. 1 ) when the airbag cushion 104 is inflated and deployed. Figure 1 (a)) A reaction force surface of the reaction force is obtained. A fixing area 156 is formed in the center of the bottom side panel 124 as a place for inserting the inflator 112 (see Figure 5 ) and fixed to the storage portion 110 (refer to Figure 1 (a)) region. In addition, exhaust holes 157a and 157b are provided as a portion for exhausting gas to the outside.
[0061] Figure 4 (b) shows an example Figure 3 (b) The inner panel 126. The inner panel 126 overlaps with the fixing area 156 of the bottom side panel 124, and serves as a space for inserting the inflator 112 (see Figure 5 ) portion, a fixing region 158 is formed. In addition, three protrusions 160a to 160c are formed as portions where the three ties 122a to 122c are joined.
[0062] Figure 4 (c) shows an example Figure 3 (b) Composite panel 128. Composite panel 128 is a three-stranded shape with three belt-shaped ties 122a to 122c extending from a circular center panel 130. The center panel 130 is circular and forms a concave portion 120 (see Figure 2 (a)) The laces 122a to 122c extend radially from the edge of the circular center panel 130 and are respectively connected to the protrusions 160a to 160c of the inner panel 126 by sewing or the like.
[0063] In addition, the central panel 130 is not limited to a circular shape, but may also be a polygon, etc. In addition, the ties 122a to 122c are not limited to a structure formed integrally with the central panel 130, but may also be formed as separate components and then connected to the central panel 130, and the central panel 130 may be tightened toward the bottom side panel 124 by any structure.
[0064] Figure 4 (d) is an example showing Figure 3 (b) is a diagram of the sub-panel 132a. The sub-panels 132a to 132c are in a polygonal shape. The pair of left and right sides 134 and 135 of the sub-panel 132a are connected to the adjacent sub-panels 132b and 132c by sewing or the like (see Figure 3 (b))Jointed edges.
[0065] One side 136 is the restraining surface 116 (see Figure 2 (a)) side edge, connected to the circular inner panel 126 ( Figure 4 (c)) is joined to the edge. The other side 138 is the bottom surface 114 (refer to Figure 2 (a)) side edge, by sewing and the like with the circular bottom side panel 124 (refer to Figure 4 One side 136 and the other side 138 are slightly curved to match the shape of the central panel 130 and the bottom side panel 124.
[0066] The side edges 134 and 135 of the sub-panel 132a protrude in an angular shape, and the width is greatest (middle portion 140) at a portion slightly closer to the other side 138 than the center between the one side 136 and the other side 138. At this time, the dimension from one side of the sub-panel 132a to the other side 138 is set longer than the dimension of the middle portion 140.
[0067] The tapered area 142 from the middle portion 140 to one side 136 gradually tapers in width toward one side 136. The tapered area 142 is pulled into the bottom side panel 124 (see FIG. Figure 3 (a)) side.
[0068] In this embodiment, one side 136 of the sub-panel 132a is formed shorter than the other side 138. Figure 3 As shown in (a), when the side panels 132 are formed by connecting the side edges 134 and 135 of the sub-panel 132a, the side panels 132 are narrowed on the restraining surface 116 side. With this side panel 132, the recess 120 can be efficiently formed on the restraining surface 116.
[0069] In addition, if it is the side panel 132, the recess 120 can be formed while seeking a simple structure through the sub-panels 132a~132c of the above-mentioned structure, thereby being able to suppress the amount of material used, and also achieve lightweight, low cost brought about by improved material yield, and further more compactly fold and store the airbag cushion 104, etc.
[0070] Figure 5 yes Figure 1 (b) are cross-sectional views of the airbag cushion 104. Figure 5 yes Figure 1 (b) is a cross-sectional view of the airbag cushion 104 taken along the line AA. The internal structure of the airbag cushion 104 will be described.
[0071] As described above, the airbag cushion 104 can efficiently form and maintain the recessed state of the recessed portion 120 by tightening the recessed portion 120 toward the inflator 112 side using the tether 122 .
[0072] The inflator 112 is a gas generating device and is fixed to the storage portion 110 (see Figure 1 The bottom portion of (a)) having the gas ejection port passes through the bottom side panel 124 and is inserted into the interior of the airbag cushion 104 .
[0073] The inflator 112 is activated in response to an impact detection signal from a sensor (not shown) to supply gas to the airbag cushion 104. The inflator 112 is disk-shaped and has a cylindrical body 144 having a discharge port and a flange 146 provided on the outer periphery of the body 144.
[0074] The inflator 112 is provided with a plurality of studs 148. The studs 148 penetrate the bottom side panel 124 of the airbag cushion 104 and are fastened to the storage portion 110 (see Figure 1 By fastening the studs 148 , the airbag cushion 104 is also fixed to the storage portion 110 .
[0075] In addition, currently popular inflators include a type that is filled with a gas generating agent and burns to generate gas, a type that is filled with compressed gas and supplies gas without generating heat, or a hybrid type that uses both combustion gas and compressed gas. Any type of inflator may be used as the inflator 112 .
[0076] Each tether such as the tether 122a is laid over the center panel 130 and the inner panel 126 around the inflator 112. The dimension L1 from the root 150 of the tether 122a on the center panel 130 side to the root 162 of the protrusion 160a of the inner panel 126 is formed to be a dimension that can pull the center panel 130 toward the inflator 112 by tensioning between the center panel 130 and the inner panel 126, that is, between the center panel 130 and the inflator 112 when the airbag cushion 104 is inflated and deployed. With the tether 122 having this structure, the concave portion 120 that is recessed toward the bottom surface 114 can be efficiently formed on the restraint surface 116 and retained.
[0077] In another embodiment, the front end of the tether 122 can be appropriately connected to the inflator 112, a retainer (not shown) used to fix the inflator 112, and the storage portion 110 (see Figure 1 (a)) is a portion on the bottom surface 114 side of the airbag cushion 104, such as the bottom of the airbag cushion 104.
[0078] Figure 5 (b) is only schematically shown Figure 5 (a) is a diagram of a panel of the airbag cushion 104. Figure 4 When the side panel 132 is formed by forming the sub-panel 132a of the shape (d), the side panel 132 is not a simple cylindrical shape, but a shape in which the width gradually increases toward the driver's side. Figure 4 (d) The middle portion 140, Figure 5 The airbag cushion 104 of (b) is also formed with a maximum diameter portion 164 having the largest diameter.
[0079] The position of the maximum diameter portion 164 can be changed and adjusted between one side 136 and the other side 138 of the secondary panel 132a (see Figure 4 (d)) The portion of the central panel 130 from the maximum diameter portion 164 to the concave portion 120 of the side panel 132 has a small curvature radius and is easy to be less tensile, so it can more flexibly receive the driver 166 (see Figure 6 (c)).
[0080] Figure 6 It is an example Figure 1 (b) is a diagram showing a process in which the airbag cushion 104 restrains the driver 166 during an oblique collision. Figure 6 The figures correspond to Figure 1 (b) is a cross-sectional view of the airbag cushion 104 taken along the line AA, illustrating the airbag cushion 104 and the driver 166 as viewed from above the vehicle.
[0081] Figure 6 (a) is a diagram showing the state of the airbag cushion 104 immediately after it is inflated and deployed. Figure 6As shown in FIG. 1A , when the vehicle is impacted by an oblique collision, the airbag cushion 104 is directed toward the driver's seat 102 (see FIG. 1B ). Figure 1 (b)) The front of the vehicle inflates and deploys.
[0082] Figure 6 (b) is an example showing Figure 6 (a) is a diagram showing a situation where the driver 166 moves toward the front of the vehicle. The driver 166 may move from the front of the vehicle due to inertia during an oblique collision. Figure 6 The state (a) moves diagonally forward to the left in the vehicle width direction.
[0083] Figure 6 (c) is an example showing Figure 6 (b) shows the driver 166 moving further forward of the vehicle. The driver 166 moving diagonally forward, for example, makes contact with the surrounding portion of the recess 120 in the restraint surface 116 with his left shoulder and contacts with the inner wall of the recess 120 from the left side of the head 168 .
[0084] If the restraint surface 116 forms the recess 120, it is possible to suppress the tension around the recess 120 compared to the conventional restraint surface that expands in a planar shape, and restrain the head 168 from the oblique front by the inner wall of the recess 120. Thus, the airbag cushion 104 can minimize the rotation 172 of the head 168 of the driver 166 relative to the shoulder 170 through the recess 120, restrain the movement of the head 168 in accordance with the movement of the shoulder 172, and prevent the driver 166 from being disengaged when tilting and moving in an oblique collision.
[0085] As described above, in this embodiment, the tether 122 can efficiently form the recessed portion 120 recessed in the center of the restraint surface 116 by tightening the restraint surface 116. In the airbag cushion 104, the occupant is restrained in a normal collision, and the rotation 172 of the head 168 of the driver 166 is greatly reduced or eliminated in an oblique collision, and the angular velocity of the head 168 is reduced, thereby suppressing the injury value of the driver 166 accompanying the rotation 172 of the head 168.
[0086] In this embodiment, the concave portion 120 is formed with a simple structure by using the side panel 132 and the tie 122 which are a combination of a plurality of sub-panels 132a to 132c. Therefore, in this embodiment, only a small amount of material such as the panel can be used, and the cost can be reduced by reducing the weight and improving the material yield, and the airbag cushion 104 can be folded and stored more compactly.
[0087] In reference to the above Figure 6In the description of (c), the clockwise rotation 172 is cited as an example of the rotation generated in the head 168. However, in an emergency situation, for example, when the driver 166 moves diagonally to the right front in the vehicle width direction, the head 168 may rotate counterclockwise around the neck when viewed from above. For this counterclockwise rotation, the concave portion 120 can also be used to reduce or eliminate the rotation of the head 168, thereby reducing the angular velocity of the head 168. In this way, the airbag cushion 104 of this embodiment can obtain the same effect for the driver 166 who moves in any direction in the vehicle width direction.
[0088] Figure 7 yes Figure 4 (d) A modified example of the sub-panel 132a shown as an example. Figure 7 (a) is a diagram illustrating a sub-panel 180 according to a first modification.
[0089] The other side 182 of the sub-panel 180 is the widest. According to this structure, it is possible to realize a maximum diameter portion 164 (see Figure 5 (b)), and the airbag cushion 104 can be inflated and deployed in a more stable posture. Moreover, according to this structure, by connecting the side edges of the plurality of sub-panels 180 to each other, the side panel 132 having a narrow shape on the side of the restraint surface 116 can be appropriately formed (see Figure 3 (a)).
[0090] Figure 7 (b) is a diagram illustrating a sub-panel 190 according to a second modification. The sub-panel 190 has a shape in which side edges 192 and 194 are curved.
[0091] The sub-panel 190 is configured such that a pair of left and right side edges 192 and 194 are curved and protrude in directions away from each other. Furthermore, by combining a plurality of sub-panels 190, a side panel 132 that can expand in a gently curved shape can be realized (see Figure 3 (a)). Furthermore, by connecting the side edges of the sub-panels 190 to each other, it is also possible to appropriately form the side panels 132 having a narrow shape on the side of the restraint surface 116 (see Figure 3 (a)).
[0092] In the above examples, the combined sub-panels may not have the same shape, and may be divided into three or more. In any structure, by joining the side edges of the sub-panels, the side panel 132 with a narrow shape on the passenger side can be appropriately realized (see Figure 3 (a)).
[0093] In the above examples, the technical concept of the airbag device 100 is implemented as a driver airbag. In addition, the airbag device 100 can also be implemented as a knee airbag. Even when the airbag device 100 is set as a knee airbag, the knees of the occupant can be properly restrained from the front by using the concave part of the tether to protect them from contacting the instrument panel. In addition, the airbag device 100 can also be implemented to restrain the occupants of the rear seats, for example, the occupants of the rear seats can be restrained from the front to protect them from contacting the front seats or flying forward.
[0094] The preferred embodiments of the present invention are described above with reference to the accompanying drawings, but it goes without saying that the present invention is not limited to this example. It is obvious that those skilled in the art can think of various changes or modifications within the scope of the claims, which of course also belong to the technical scope of the present invention.
[0095] Furthermore, in the above-described embodiment, an example in which the airbag device of the present invention is applied to an automobile has been described. However, the airbag device of the present invention may be applied to aircraft, ships, etc. other than automobiles, and the same operational effects can be obtained.
[0096] Industrial Applicability
[0097] The present invention can be used in a vehicle airbag device for restraining an occupant in an emergency.
[0098] Explanation of symbols
[0099] 100... air bag device 102... driver's seat
[0100] 104…Airbag cushion 106…Steering wheel
[0101] 108 ... wheel rim 110 ... storage portion
[0102] 112 ... inflator 114 ... bottom surface
[0103] 116 ...constraint surface 118 ...side surface
[0104] 120 ... recessed portion 122 ... tie
[0105] 122a...first tether 122b...second tether
[0106] 122c…third tie 124…bottom side panel
[0107] 126…Inner Panel 128…Composite Panel
[0108] 130…Central panel 132…Side panel
[0109] 132a-132c...sub-panels 134, 135...sides
[0110] 136... one side 138... the other side
[0111] 140 ... middle part 142 ... tapered area
[0112] 144 ...Main body 146 ...Flange
[0113] 148…Stud 150…Root
[0114] 156 ...fixed area 157a, 157b ...exhaust hole
[0115] 158 ...Fixed area 160a ...Protrusion
[0116] 162…Root 164…Maximum diameter
[0117] 166…driver 168…head
[0118] 170…Shoulder 172…Rotation
[0119] 180...Sub-panel 182...Other side
[0120] 190…Sub-panel 192, 194…Side
[0121] L 1…Dimensions
Claims
1. A vehicle airbag device, comprising: an airbag cushion that expands and deploys between a structure in a vehicle compartment and an occupant seated on a seat in an emergency; an inflator that is disposed on the structure, It is characterized in that The airbag cushion has: a bottom surface of the structure side; the restraint surface on the passenger side; a side surface connecting the bottom surface and the restraining surface; a concave portion which is formed by being recessed in a predetermined range in the center of the restraining surface in the direction of the bottom surface, The range from the side surface to at least a part of the restraint surface is formed by a predetermined side panel, The side panel includes a plurality of sub-panels divided along the circumferential direction of the side surface, The plurality of sub-panels respectively have: a pair of side edges joined to adjacent sub-panels; One side of the constraint surface; The other side of the bottom surface, Wherein, the one side is shorter than the other side.
2. The vehicle airbag device according to claim 1, wherein: The sub-panel forms a range of the recessed portion from the side surface to the restraint surface.
3. The vehicle airbag device according to claim 1 or 2, characterized in that: The plurality of sub-panels are respectively joined to each other by sewing with adjacent sub-panels.
4. The vehicle airbag device according to claim 1 or 2, characterized in that: The bottom surface of the airbag cushion is formed by a predetermined bottom side panel. The other side is joined to the edge of the bottom side panel.
5. The vehicle airbag device according to claim 4, wherein: A portion of the inflator passes through the bottom side panel and is inserted into the airbag cushion. The airbag cushion further includes a tether for tightening the recessed portion toward the inflator.
6. The vehicle airbag device according to claim 5, wherein: The mid-bottom of the concave portion of the airbag cushion is formed by a predetermined central panel. The side is joined to an edge of the central panel, The tether is installed at a predetermined position on the center panel and the inflator or around the inflator.
7. The vehicle airbag device according to claim 6, wherein: The structure is a steering wheel of a vehicle, The inflator is arranged near the center of the steering wheel. The airbag cushion is rolled or folded and accommodated in a portion near the center.
8. The vehicle airbag device according to any one of claims 1, 2, 5 and 6, characterized in that: The pair of side edges of the sub-panel have a structure that is protruded and bent in directions away from each other.
9. The vehicle airbag device according to any one of claims 1, 2, 5 and 6, characterized in that: The other side of the secondary panel is the widest.
10. The vehicle airbag device according to any one of claims 1, 2, 5 and 6, characterized in that: The sub-panel has a widest middle portion formed between the other side and the one side.