CN116588027A - Occupant protection device - Google Patents
Occupant protection device Download PDFInfo
- Publication number
- CN116588027A CN116588027A CN202310109788.9A CN202310109788A CN116588027A CN 116588027 A CN116588027 A CN 116588027A CN 202310109788 A CN202310109788 A CN 202310109788A CN 116588027 A CN116588027 A CN 116588027A
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- CN
- China
- Prior art keywords
- occupant
- airbag
- side panel
- cover
- protection device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 239000000463 material Substances 0.000 claims description 36
- 238000009958 sewing Methods 0.000 claims description 14
- 230000000452 restraining effect Effects 0.000 claims description 9
- 210000000689 upper leg Anatomy 0.000 claims description 9
- 238000004804 winding Methods 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 239000000470 constituent Substances 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000009940 knitting Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
- B60R21/207—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in vehicle seats
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Bags (AREA)
Abstract
An occupant protection device (10) is provided with an airbag cover (57) covering an assembly portion (22) of an airbag (30) folded by an airbag (30) and a belt portion (13), wherein the airbag cover (57) is substantially cylindrical connecting an occupant side panel portion (58) and an occupant side panel portion (59), and a separation scheduled portion (60) extending in a left-right direction and separated from a portion on the occupant side panel portion (59) is disposed on the front end (59 a) side of the occupant side panel portion (59) so that a rear end (59 b) side of the occupant side panel portion (59) can be used as a rotation center at the time of deployment when the airbag (30) is inflated.
Description
Technical Field
The present invention relates to an occupant protection device for protecting an occupant seated in a seat.
Background
Conventionally, as an occupant protection device, there is known a structure in which an airbag inflated by inflow of inflation gas is assembled to a lap belt portion of a seat belt to protect an occupant seated in a seat (for example, refer to japanese patent application laid-open No. 2015-51744). The lap belt portion of the seat belt is a belt portion disposed in front of the waist of the occupant seated in the seat in a state where both right and left ends are connected to the right and left sides of the seat. The airbag is configured to be inflated by flowing inflation gas in, and to perform stopper protection on an upper body including a head of an occupant moving forward by means of occupant restraint on a rear surface side in a state where a support surface on a lower surface side is supported on a thigh of the occupant when inflation is completed. In addition, in the occupant protection device, in order to prevent foreign matter from being mixed into the folded airbag, the airbag cover can bulge the airbag at the time of inflation to cover the assembled portions of the folded airbag and the airbag of the belt portion.
In the conventional occupant protection device, when the airbag is operated, the airbag cover is pushed and deployed from the folded state by the airbag, and it is necessary to be able to deploy from the assembled portion of the airbag at the lap portion to protect the head and chest of the upper body of the occupant and to dispose the occupant restraining surface on the rear surface side on the front surface side of the occupant. However, if the method of squeezing and expanding the airbag cover by the airbag at the time of inflation is unstable, the airbag may be expanded too close to the upper body of the occupant and may not be smoothly expanded.
Disclosure of Invention
The present invention provides an occupant protection device capable of smoothly expanding and restraining an occupant during operation even when a folded airbag is covered by an airbag cover and assembled to a lap belt portion.
The occupant protection device according to the present invention includes a lap belt portion of a seat belt, and is configured to be disposed on a front side of a waist portion of an occupant seated in a seat in a state where both right and left ends are coupled to the right and left sides of the seat when the occupant is wearing the occupant, and includes: an airbag which is assembled to the waist belt portion, and which is inflated by inflow of inflation gas during operation, and which is capable of performing a load-bearing protection on an upper body including a head of an occupant moving forward by means of occupant restraint on a rear surface side in a state in which a support surface on the lower surface side is supported by a thigh of the occupant after inflation; and an airbag cover that covers the folded airbag and an assembled portion of the airbag of the belt portion so as to be capable of protruding the airbag when inflated, wherein the airbag cover has a configuration in which, in a state of wearing the belt portion, an occupant side panel portion that contacts an occupant and a separated occupant side panel portion are connected to each other, a periphery of the assembled portion of the airbag of the belt portion is covered with the folded airbag, and wherein a separation scheduled portion that extends in a left-right direction and is separated from the portion on the occupant side panel portion side is disposed on a front end side of the occupant side panel portion so as to be capable of expanding rearward with a rear end side of the occupant side panel portion as a rotation center when expanding the airbag.
In the occupant protection device according to the present invention, the folded airbag is inflated by the inflow of inflation gas, and the airbag cover is squeezed and deployed during operation. At this time, the occupant-side-surface-plate-portion-side is separated from the occupant-side-plate-portion-side portion by the separation of the front-end-side separation scheduled portion, and is rotated rearward. That is, since the airbag cover is provided with the opening on the thigh side on the side separated from the upper body of the occupant so that the inflated airbag bulges, the inflated airbag is initially separated from the upper body side of the head and chest of the occupant and is deployed and inflated on the thigh side, and therefore bulging from the beginning of inflation to the head and chest side of the occupant can be suppressed. Therefore, the inflated airbag does not come into contact with the chin or the like of the occupant, and the occupant restraining surface can be smoothly deployed to cover the front surface side of the upper body, thereby completing inflation.
Therefore, in the occupant protection device according to the present invention, the folded airbag can be smoothly deployed and inflated to restrain the occupant even when the folded airbag is assembled to the lap belt portion while being covered with the airbag cover.
In the occupant protection device according to the present invention, the airbag cover may be formed by sewing the front and rear edge portions of the 2 cover materials constituting the occupant side panel portion and the occupant opposite side panel portion, respectively, to each other, and the predetermined separation portion may be a sewing portion on the front edge sides of the 2 cover materials.
With this structure, when the folded airbag is wrapped around the lap belt portion by the airbag cover, the separation scheduled portion can be formed simply on the front edge side of the 2 cover materials constituting the occupant side panel portion and the occupant side panel portion by making the strength of the sewn portion on the front edge side weaker than that of the sewn portion on the rear edge side at the respective sewn portions of the front edge side and the rear edge side of the 2 cover materials. In addition, the suture portion forming the separation scheduled portion can be easily formed by using a suture having a weaker strength than the suture portion on the trailing edge side, so that the suture is easily broken, the number of stitches is reduced, or the like.
Alternatively, in the occupant protection device according to the present invention, the airbag cover may be formed of 1 cover material forming the occupant side panel portion and the occupant side panel portion, and a sewn portion of end portions of the cover material may be provided as the separation scheduled portion at a connecting portion of the occupant side panel portion and the occupant side panel portion on the distal end side of each other.
According to this configuration, when the folded airbag is wrapped around the waist belt portion by the airbag cover, the airbag cover provided with the planned separation portion formed by the sewn portion can be formed by sewing only the end portions of the 1 cover materials to each other, and therefore, the number of cover materials constituting the airbag cover can be reduced, and the number of constituent members of the occupant protection device can be reduced.
Drawings
Fig. 1 is an oblique view of a seat in which an occupant protection device according to an embodiment of the present invention is mounted.
Fig. 2 is a left side view of the seat with the occupant protection device mounted.
Fig. 3 is a front view of a seat in which the occupant protection device is mounted, showing a state in which the seat belt is worn on an occupant, and the inflation of the airbag is indicated by a two-dot chain line.
Fig. 4 is a schematic cross-sectional view of an assembled portion of the airbag at the lap belt portion of the occupant protection apparatus, corresponding to the IV-IV portion of fig. 3.
Fig. 5 is a schematic perspective view showing a state of the occupant protection apparatus after inflation of the airbag.
Fig. 6 is a schematic plan view of structural members of an airbag, a gas supply path portion, an airbag coupling portion, and an airbag cover that constitute the occupant protection device.
Fig. 7 is a diagram illustrating a process of folding an airbag of the occupant protection apparatus.
Fig. 8 is a view illustrating a process for folding an airbag of the occupant protection apparatus, and a process subsequent to fig. 7 is illustrated.
Fig. 9 is a left side view, partially in section, of a seat in a state in which a lap belt portion of an occupant protection apparatus is worn.
Fig. 10 is a schematic left side view of the seat illustrating operation of the occupant protection apparatus.
Fig. 11 is a schematic left side view of the seat showing the completion of inflation of the airbag when the occupant protection device is operated.
Fig. 12 is a schematic cross-sectional view of an airbag assembly of a modification and a plan view of a cover material constituting an airbag cover to be used.
Fig. 13 is a left side view, partially in cross section, of a seat in a state in which a belt portion of the occupant protection device shown in fig. 12 is worn.
Detailed Description
An embodiment of the present invention will be described below with reference to the drawings. As shown in fig. 1 to 3 and 9 to 11, the occupant protection apparatus 10 according to the embodiment is mounted on a seat 1 of a vehicle, and includes: a seat belt 11; an airbag assembly 29 having an airbag 30; and an inflator 24 that supplies inflation gas to the airbag 30. The seat 1 has a backrest 2 and a seat 5.
In order to restrain the occupant MP seated in the seat 1, the seat belt 11 can be configured such that the upper end 11a side is led out from the retractor 15 disposed inside the left edge 3a side of the upper end 3 of the backrest 2 on one side (left side in the embodiment) in the left-right direction of the seat 1, and the lower end 11b side is disposed as a fixed end fixed to the anchor member 17 disposed on the left side 6 side of the seat 5. The seat belt 11 is formed of a belt-shaped member formed by knitting polyester fiber or the like having good sliding performance.
The tongue 20 is disposed in the middle of the seat belt 11, the tongue 20 is fastened to the buckle 19 disposed on the right side 7 of the seat 5 on the other side (right side in the embodiment) in the left-right direction of the seat 1, the seat belt 11 in a state where the tongue 20 is fastened to the buckle 19 is configured such that a portion extending from the tongue 20 toward the retractor 15 is a shoulder belt portion 12 disposed on the front surface side of the upper body MU of the occupant MP, and a portion extending from the tongue 20 toward the fixed end 11b is configured such that a waistband portion 13 disposed on the front surface side of the waist MW of the occupant MP. Further, a release button, not shown, is provided on the buckle 19, and when the fastening of the fastened tongue piece 20 is released, the tongue piece 20 can be detached from the buckle 19 if the release button is pressed. The retractor 15 is configured to be provided with a pretensioner that stops the extraction if the webbing 11 is rapidly extracted, and that is capable of winding up the extracted webbing 11 if a vehicle collision or the like occurs.
The inflator 24 has: a substantially cylindrical inflator body 25 that discharges inflation gas; and a tube portion 26 protruding from the inflator main body 25 to be bent in an approximately L-shape, the inflator 24 being attached and fixed to the rear surface side of the seat portion 5 of the seat 1 (see fig. 1 and 2). The distal end 47a of the gas supply path 45 of the airbag 30 is externally attached to the tube 26, and is fastened by a clamp 27.
The airbag assembly 29 includes the airbag 30, the airbag coupling portion 52, and the airbag cover 57, and in the case of the embodiment, is configured to include a gas supply path portion 45 that couples the airbag 30 to the inflator 24 and supplies inflation gas from the inflator 24 to the airbag 30.
As shown in fig. 5 and 11, the airbag 30 has a configuration in which the peripheral wall 31 is inflated in a nearly triangular prism shape when seen from the side, and includes a bottom wall portion 32 on the bottom surface side, a rear wall portion 33 on the rear surface side, a front wall portion 34 on the front surface side, and left and right side wall portions 35 (L, R). In the airbag 30 at the time of completion of inflation, the lower surface 32a side of the bottom wall portion 32 is set as a support surface 37 to be supported by the thigh MF of the occupant MP, and the rear surface 33a side of the rear wall portion 33 is set as an occupant restraining surface 38 to receive the upper body MU of the occupant MP moving forward. Regarding the occupant restraining surface 38, an upper portion side is defined as a head restraining portion 38a, and a lower portion side is defined as a chest restraining portion 38b.
An inflow port 40 is disposed near the rear edge 32b of the bottom wall 32, and the inflow port 40 is opened so as to allow a plurality of inflow ports 40a into which the inflation gas from the gas supply passage 45 flows. Further, on the front side of the left and right side wall portions 35L, 35R, a vent hole 42 for discharging the remaining portion of the inflation gas flowing into the airbag 30 is opened.
The airbag 30 is formed of a woven fabric of polyester or the like together with the gas supply passage 45 and the airbag connecting portion 52. The peripheral wall 31 of the airbag 30 is formed of 2 cover materials, that is, a front portion 31a and a rear portion 31b, the front portion 31a forming the front side of the bottom wall portion 32, the front wall portion 34, and the left and right side wall portions 35 (L, R), and the rear portion 31b forming the rear side of the rear wall portion 33 and the left and right side wall portions 35 (L, R) (see fig. 6).
The gas supply path 45 is configured to include: an airbag side 46 connected to the airbag 30; and a tubular gas flow path portion 47 extending from the airbag side portion 46 toward the inflator 24 (see fig. 6). As described above, the gas flow path portion 47 connects the tip 47a to the tube portion 26 of the inflator 24. The bag side portion 46 is provided with a communication port 46a communicating with the inflow port 40a of the inflow port 40 of the bag 30, the periphery of the communication port 46a is sewn to the periphery of the inflow port 40a, and the bag side portion 46 is connected to the rear edge 32b side of the bottom wall portion 32 which is the lower end 30a of the bag 30.
The gas supply passage 45 is formed by sewing the outer peripheral edges of the lower surface side outer member 49 and the airbag side member 50 having the same outer shape and dimension to each other. Before the outer peripheral edges of the outer member 49 and the airbag-side member 50 are sewn to each other, the peripheral edge of the communication port 46a of the airbag-side member 50 is sewn to the peripheral edge of the inflow port 40a of the airbag 30 in advance.
The airbag coupling portion 52 couples the folded airbag 30 to the waistband portion 13 so as to be slidable along the waistband portion 13, and in the case of the embodiment, couples the airbag side portion 46 of the gas supply path portion 45 to the lower surface 32a side of the airbag 30 with the interposition therebetween (see fig. 4 and 5). The airbag connecting portion 52 is formed in a tubular shape in which the waistband portion 13 can be inserted by connecting the end portions 54a, 54a of the 1 sheet-like material 54 to each other so as to provide: an occupant side portion 52a that covers a face (occupant side face) 13a of the lap portion 13 on the occupant MP side when worn; and an occupant-opposite side portion 52b that covers a surface (occupant-opposite side surface) 13b of the lap belt portion 13 on the opposite side from the occupant MP and is connected to the airbag 30 side. The airbag connecting portion 52 is connected to the airbag side 46 of the gas supply passage 45 without directly connecting the sewn portion 52c of the occupant opposite side 52b to the airbag 30, and in the embodiment, the airbag connecting portion 52 indirectly connects the gas supply passage 45 to the airbag 30 through the middle.
The airbag cover 57 is provided to cover the folded airbag 30 and the assembly portion 22 of the airbag 30 of the waistband portion 13 in such a manner that the airbag 30 can bulge when inflated. In the case of the embodiment, the airbag cover 57 also covers the airbag side 46 and the airbag connecting portion 52 of the gas supply path 45 connected to the airbag 30. The airbag cover 57 is formed of a fabric that is different from the material of the airbag 30 or the like and is used for the seat material of the seat 1 so as not to deteriorate the external appearance.
The airbag cover 57 has the following portions and is formed in an approximately cylindrical shape into which the waistband portion 13 can be inserted: an occupant side panel portion 58 that is located on the occupant MP side when the lap belt portion 13 is worn; and an occupant opposite side panel portion 59 located on a side separated from the occupant MP. As described above, the occupant side panel portion 58 and the occupant opposite side panel portion 59 are formed of the cover materials 62 and 63 made of fabric (see fig. 5). The cover material 63 constituting the occupant side panel portion 58 and the cover material 62 constituting the occupant side panel portion 59 are formed by providing sewn portions 67 (F, B) formed by sewing the sewn lines 65, 66 of polyester or the like on the leading edges 62a, 63a and the trailing edges 62B, 63B (see fig. 4).
In the case of the embodiment, with respect to the sewing lines 65, 66, the tensile strength of the sewing line 65 on the front side is made weaker than that of the sewing line 66 on the rear side, and when the airbag 30 is inflated, the sewing line 65 is broken to separate the sewing portions 67F of the leading edges 62a, 63a of the cover materials 62, 63 from each other, so that the occupant opposite side panel portion 59 is deployed in such a manner as to deploy rearward with the rear end 57b side of the airbag cover 57 as the rotation center. That is, in the case of the embodiment, the airbag cover 57 is configured such that the sewn portion 67F on the front end (front edges 62a, 63 a) 57a side is formed as the separation scheduled portion 60, and when the airbag 30 is inflated, the sewn line 65 of the sewn portion 67F is broken so that the front end 59a side of the occupant opposite side panel portion 59, which is the deployment side edge 60a of the separation scheduled portion 60, is separated from the front end 58a side of the occupant side panel portion 58, which is the fixation side edge 60B of the separation scheduled portion 60, and the rear end 59B side of the sewn portion 67B side is pushed and deployed rearward against the occupant opposite side panel portion 59 as the rotation center, thereby making the airbag 30 convex (see fig. 9 and 10).
When the airbag assembly 29 is assembled to the lap belt portion 13, first, the portion of the airbag side portion 46 of the airbag side member 50 of the gas supply passage portion 45 is sewn to the inflow port portion 40 of the airbag 30, and the portion of the occupant opposite side portion 52b of the airbag connecting portion 52 before being formed into a tubular shape is sewn to the portion of the airbag side portion 46 of the outer member 49 of the gas supply passage portion 45, and then, the outer peripheral edges of the outer member 49 and the airbag side member 50 are sewn to each other. As a result, the gas supply path 45 is formed, which is connected to the airbag 30 and connects the airbag connecting portion 52 before being formed in a cylindrical shape.
Then, the airbag 30 is folded. The folding of the airbag 30 is a step of reducing the front-rear-left-right dimensions to be folded into a dimension that can be assembled to the assembly portion 22 of the waistband portion 13, and first, as shown in fig. 7a, the rear wall portion 33 side of the peripheral wall 31 of the airbag 30 is flattened and overlapped with the upper side of the inflow opening 40 to form a preliminary folded body 80 of the airbag 30. Next, as shown in A, B of fig. 7, the upper side portion 80a of the rear wall portion 33 of the preliminary folded body 80 is folded toward the lower side portion 80b to form an initial folded body 82. Then, as shown in fig. 7B and 8a, folds 83 and 83 along the front-rear direction are provided on the left and right sides of the initial folded body 82, the left and right edges 82a and 82B are folded toward the inflow port 40a side of the inflow port 40, and, as shown in fig. 8A, B, if the folded body 86 of the airbag 30 is formed by folding such that the end edge 84a of the lower portion 84 of the initial folded body 82 approaches the inflow port 40a side. Further, in order to prevent the fold from being released, the folded body 86 is previously wrapped with the pre-fixing band member 88 until the end portions 54a, 54a of the airbag connecting portion 52 are sewn together.
Then, the assembly portion 22 of the waistband portion 13 is wrapped with the sheet material 54 of the airbag connecting portion 52 before being formed in a tubular shape, and the end portions 54a, 54a of the sheet material 54 are sewn to each other to form the airbag connecting portion 52. Further, if the cover material 63 forming the occupant side panel portion 58 is disposed on the occupant side surface 13a of the lap belt portion 13 and the cover material 62 forming the occupant side panel portion 59 is covered on the upper surface 86a of the folded body 86 of the airbag 30, and the front edges 62a, 63a and the rear edges 62b, 63b of the cover materials 62, 63 are sewn to each other by the corresponding sewn lines 65, 66, the airbag cover 57 (see fig. 4) covering the assembly portion 22 of the lap belt portion 13 for each airbag assembly 29 can be formed.
As described above, the occupant protection device 10 according to the embodiment is configured such that the airbag assembly 29 is assembled to the assembly portion 22 of the lap belt portion 13 of the seat belt 11 in which the seat 1 is disposed, and the front end 47a of the gas supply path portion 45 is connected to the tube portion 26 of the inflator 24 by the clip 27, so that the occupant protection device can be mounted on the seat 1.
In the occupant protection device 10 according to the embodiment, after the seat belt 11 mounted on the seat 1 is worn, if the folded airbag 30 is operated, the inflation gas is introduced into the folded airbag to inflate the airbag cover 57, and the airbag is compressed and deployed. At this time, the deployment side edge 60a of the occupant side opposite surface plate portion 59 is separated from the portion (fixing side edge) 60 of the occupant side surface plate portion 58 by the separation of the separation scheduled portion 60 of the front end 59a side and rotated rearward (see the two-dot chain line of fig. 4 and 9). That is, the airbag cover 57 is provided with the opening 61 on the thigh MF side on the side separated from the upper body MU of the occupant MP, and the inflated airbag 30 is projected, and as shown in fig. 9 to 11, the inflated airbag 30 is initially separated from the upper body MU side of the head MH and the chest MB of the occupant MP and is deployed and inflated on the thigh MF side, so that the projection from the initial stage of inflation to the head MH and the chest MB side of the occupant MP can be suppressed. Therefore, the inflated airbag 30 does not come into contact with the chin MJ or the like of the occupant MP, and the occupant restraining surface 38 can be smoothly deployed so as to cover the front surface side of the upper body MU, and the inflation can be completed (see fig. 11).
Therefore, in the occupant protection device 10 according to the embodiment, even when the folded airbag 30 is covered with the airbag cover 57 and assembled to the lap belt portion 13, the occupant MP can be restrained by smoothly expanding and expanding during operation.
In the occupant protection device 10 according to the embodiment, the airbag cover 57 is formed by stitching the front and rear edges 62a, 63a and the edges 62b, 63b of the 2 cover materials 62, 63 constituting the occupant side panel portion 58 and the occupant side panel portion 59, respectively, and the planned separation portion 60 is a stitched portion 67F (see fig. 4) on the front edges 62a, 63a side of the 2 cover materials 62, 63.
Therefore, in the embodiment, when the folded airbag 30 is disposed by wrapping the waist belt portion 13 with the airbag cover, the separation scheduled portion 60 can be simply formed on the front edges 62a, 63a side of the 2 cover materials 62, 63 constituting the occupant side panel portion 58 and the occupant side panel portion 59 by making the strength of the sewn portion 67F on the front edges 62a, 63a side weaker than the strength of the sewn portion 67B on the rear edges 62B, 63B side only at the sewn portion 67 (F, B) of each of the front edges 62a, 63a side of the 2 cover materials 62, 63.
In the case of the embodiment, the case where the suture strength of the suture portion 67F forming the planned separation portion 60 is made weaker than the suture portion 67B on the trailing edges 62B, 63B side is shown as an example, and the tensile strength of the used suture lines 65, 66 is given to be large, but in addition to this, the number of the suture lines may be set by reducing the number of the suture lines or the like. However, if the structure is such that the difference in the suture strength is provided only by providing the difference in the tensile strength of the suture lines 65, 66 to be sutured as in the embodiment, the difference in strength can be easily provided to the sutured portions 67F, 67B by merely changing the thread used for suturing.
In addition, the airbag cover 57 of the embodiment has been described as being formed by sewing the leading edges 62a, 63a and the trailing edges 62b, 63b of the cover materials 62, 63 to each other when the waistband portion 13 is wrapped, but may be formed by sewing only one edge side of the leading edges 62a, 63a and the trailing edges 62b, 63b to each other in advance, and sewing the other edge side of the waistband portion 13 so as to wrap the waistband portion 13 when the airbag cover is assembled to the waistband portion 13.
In the embodiment, the airbag cover 57 is formed of 2 cover materials 62 and 63, but may be formed of 1 cover material 72 forming the occupant side panel portion 58A and the occupant side panel portion 59A as in the airbag cover 57A of the occupant protection device 10A shown in fig. 12 and 13, and the sewn portion 75 of the end portions 72a of the cover material 72 may be set at the connecting portion on the front ends 58A and 59A side of the occupant side panel portion 58A and the occupant side panel portion 59A so as to form the separation scheduled portion 60A.
In this occupant protection device 10A, when the folded airbag 30 is disposed by wrapping the lap belt portion 13 with the airbag cover 57A, only the end portions 72a, 72a of the 1 cover material 72 are sewn to each other, and the airbag cover 57A provided with the planned separation portion 60A constituted by the sewn portion 76 can be formed, so that the number of cover materials 72 constituting the airbag cover 57A can be reduced, and the number of constituent components of the occupant protection device 10A can be reduced.
Of course, the sewn portion 76 of the planned separation section 60A in this case is also likely to break the used sewn line 65F, or the number of stitches is reduced, so that the occupant-opposite side panel portion 59 can be easily and reliably separated at the planned separation section 60A and rotated and unfolded rearward when the occupant protection device 10A is operated.
In addition, as the seat belt disposed on the seat, not only in the case of 3-point type shown in fig. 1 to 3, but also in a configuration in which the airbag assembly 29 is assembled to the lap belt portion of the two-point type seat belt without the shoulder belt portion.
In the embodiment, the case where the separation scheduled portion 60 is disposed at the boundary portion between the occupant side panel portion 58 and the occupant side panel portion 59 has been described, but the separation scheduled portion may be disposed by expanding the airbag 30 from the thigh MF side separated from the upper body MU of the occupant MP when the airbag is inflated, or by providing a separable slit or the like at a portion of the occupant side panel portion 59 slightly separated from the boundary portion between the occupant side panel portion 58 and the occupant side panel portion 59, or at a portion of the occupant side panel portion 58, even if the separation scheduled portion is not strictly disposed at the boundary portion between the occupant side panel portion 58 and the occupant side panel portion 59.
Claims (4)
1. An occupant protection device (10) is provided with a belt portion (13) of a seat belt (11), wherein the belt portion (13) is configured to be connected at both right and left ends to the right and left sides of a seat (1) when being worn on an occupant (MP), can be configured to be arranged at the front side of the waist portion (MB) of the occupant (MP) sitting on the seat (1), and,
the occupant protection device (10) is configured to have:
an airbag (30) which is assembled to the waist belt part (13) and which is inflated by inflow of inflation gas during operation, wherein when inflation is completed, the upper body (MU) including the head of the occupant (MP) moving forward can be protected by the occupant restraining surface (38) on the rear surface side while the support surface (37) on the lower surface side is supported by the thigh (MF) of the occupant (MP); and
an airbag cover (57) that covers the folded airbag (30) and the assembly site (22) of the airbag (30) of the waistband part (13) so as to be able to bulge the airbag (30) when inflated,
the occupant protection device (10) is characterized in that,
the airbag cover (57) is configured to have a substantially cylindrical shape in which an occupant side panel portion (58) that contacts an occupant (MP) and an occupant opposite side panel portion (59) that is separate from the occupant (MP) are connected to each other in a state of wearing the waist belt portion (13), to cover the periphery of an assembly portion (22) of the airbag (30) of the waist belt portion (13) together with the folded airbag (30), and to cover the airbag,
a separation scheduled portion (60) which extends in the left-right direction and is separated from the portion on the side of the side panel portion (59) of the occupant is arranged on the side of the front end (59 a) of the side panel portion (59) of the occupant so that the portion on the side of the side panel portion (59) of the occupant can be unfolded rearward with the rear end (59 b) of the side panel portion (59) of the occupant as the rotation center at the time of unfolding when the airbag (30) is inflated.
2. The occupant protection device (10) according to claim 1, wherein,
the airbag cover (57) is formed by sewing the corresponding front and rear edges of 2 cover materials (62, 63) respectively constituting the passenger side panel (58) and the passenger opposite side panel (59) to each other,
the predetermined separation section (60) serves as a stitching section (67F) on the front edges (62 a, 63 a) side of the 2 cover materials (62, 63).
3. The occupant protection device (10) according to claim 1, wherein,
the airbag cover (57) is formed of 1 cover material (72) forming the occupant side panel (58) and the occupant opposite side panel (59), and,
a sewn portion (76) of the end portions (72 a) of the cover material (72) is provided as the separation scheduled portion (60) at a connecting portion on the front ends (58A, 59A) side of the occupant side panel portion (58A) and the occupant opposite side panel portion (59A) each other.
4. The occupant protection device (10) according to claim 1, wherein,
the occupant protection device (10) is provided with:
an inflator (24) that supplies an inflation gas to the airbag (30); and
a retractor (15) capable of winding up the seat belt (11),
the inflator (24) and the retractor (15) are mounted on a seat (1).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022020886A JP2023118012A (en) | 2022-02-14 | 2022-02-14 | Occupant protection device |
| JP2022-020886 | 2022-02-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116588027A true CN116588027A (en) | 2023-08-15 |
Family
ID=87597854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310109788.9A Pending CN116588027A (en) | 2022-02-14 | 2023-02-14 | Occupant protection device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2023118012A (en) |
| CN (1) | CN116588027A (en) |
-
2022
- 2022-02-14 JP JP2022020886A patent/JP2023118012A/en active Pending
-
2023
- 2023-02-14 CN CN202310109788.9A patent/CN116588027A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP2023118012A (en) | 2023-08-24 |
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