JP5659137B2 - Airbag - Google Patents

Description

  The present invention relates to an airbag that inflates and deploys between a seat and a side door in a side collision or rollover (rollover) of a vehicle.

  An airbag installed in a vehicle such as an automobile includes a cushion portion that inflates and deploys using gas supplied from an inflator. As the cushion portion, for example, one having an upper chamber that protects the shoulder, chest, and abdomen of the occupant and a lower chamber that protects the occupant's waist during inflation and deployment is known.

  On the other hand, Patent Document 1 describes an airbag that does not include an upper chamber and includes a cushion portion that restrains the occupant's waist at the rear of the pelvis centered on the iliac bone in the skeleton of the occupant seated on the seat. Yes.

JP 2007-8448 A

  In recent years, there has been a strong demand for airbags to reduce damage to passengers by the airbags themselves. However, in the airbag described in Patent Document 1, when the airbag is inflated and deployed at the time of a side collision, the load from the airbag is concentrated on the waist of the occupant, resulting in a high injury value and a possibility that the occupant protection performance is impaired. There is.

  Moreover, in the said airbag, although it considers protecting a passenger | crew's waist | hip | lumbar part, nothing is considered about a passenger | crew's thigh and a knee part.

  In view of such a problem, an object of the present invention is to provide an airbag capable of improving occupant protection performance.

  In order to solve the above problems, a representative configuration of an airbag according to the present invention is an airbag including a cushion portion that inflates and deploys between a seat and a side door using gas, and the cushion portion In the side view, when the cushion part is deployed, the cushion part covers an area including 80% or more of the range corresponding to the femur of an occupant seated in a normal posture on the seat.

  According to the said structure, a cushion part covers most of a passenger | crew's thigh at the time of inflation expansion | deployment. Here, the thigh is a part (range) corresponding to the femur. For this reason, the load from a cushion part is distributed over most of a passenger | crew's thigh, and does not concentrate on a passenger | crew's waist | hip | lumbar part. Therefore, it is possible to reduce an excessive load applied to the occupant's waist during the inflation and deployment of the cushion portion, and to improve the occupant protection performance. In addition, a regular attitude | position means the attitude | position of the dummy seated at the time of a vehicle side collision test.

  The cushion portion may be deployed only forward from a position corresponding to the iliac bone of the occupant. Here, the iliac bone is a part of the pelvis and is located on the back side of the waist. For this reason, the load from a cushion part is disperse | distributed to a part of a passenger | crew's waist | hip | lumbar part and most of thighs, and does not concentrate on the whole passenger | crew's waist | hip | lumbar part. For this reason, a passenger | crew protection performance can be improved more.

  Another representative configuration of the airbag according to the present invention is an airbag including a cushion portion that inflates and deploys between a seat and a side door using gas, and the cushion portion is in a side view, When the cushion portion is deployed, the cushion portion covers at least a region including a position near the position corresponding to the iliac bone of the occupant seated in a normal posture on the seat and immediately before the position corresponding to the knee portion of the occupant. .

  According to the said structure, a cushion part covers from a passenger | crew's waist | hip | lumbar part to just before a knee part at the time of inflation deployment. For this reason, the load from the cushion portion is distributed in the range from the occupant's waist to the front of the knee, and does not concentrate on the occupant's waist. Accordingly, it is possible to reduce an excessive load applied to the occupant's waist when the cushion part is inflated and deployed, and to improve the occupant protection performance.

  The cushion portion may be deployed only forward from a position corresponding to the iliac bone of the occupant. For this reason, the load from the cushion portion is distributed in a range from a part of the lumbar portion of the occupant to immediately before the knee portion and is not concentrated on the lumbar portion of the occupant, so that the occupant protection performance can be further improved.

  The region includes the entire position corresponding to the occupant's knee. Thereby, a cushion part covers from the waist | hip | lumbar part to the whole knee part at the time of expansion | deployment deployment. For this reason, the load from a cushion part is distributed over a wider range, and does not concentrate on a passenger | crew's waist | hip | lumbar part. Therefore, passenger protection performance can be further improved.

  ADVANTAGE OF THE INVENTION According to this invention, the airbag which can improve passenger | crew protection performance can be provided.

It is the schematic which illustrates the airbag in embodiment of this invention. FIG. 2 is a diagram illustrating a state where the airbag of FIG. 1 is inflated and deployed. It is a schematic diagram which illustrates the position of the cushion part of FIG. 2 with a passenger | crew's skeleton. It is a perspective view which shows the dummy imitating a passenger | crew. It is a figure which shows the mode of the side collision test using the dummy of FIG. It is a figure which illustrates another airbag.

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

  FIG. 1 is a schematic view illustrating an airbag 100 according to an embodiment of the present invention. FIG. 1A is a perspective view showing a part inside the vehicle 110. FIG. 1B is a diagram illustrating a state in which the inside of the vehicle 110 in FIG. 1A is viewed from the front side of the vehicle.

  The airbag 100 is built in a seat 120 that is a left front seat in the vehicle 110. Note that an airbag having a similar configuration is also incorporated in the right front seat (not shown).

  The airbag 100 includes a cushion portion 140 (see FIG. 2) that is provided on the vehicle outer side of the seat 120 and that inflates and deploys between the seat 120 and the side door 130.

  FIG. 2 is a diagram illustrating a state where the airbag 100 of FIG. 1 is inflated and deployed. In the figure, a state in which the occupant 150 is seated on the seat 120 is viewed from the side of the vehicle. In the figure, the left side is the front side of the vehicle and the front side is the outside of the vehicle.

  The airbag 100 includes a cushion part 140 and an inflator 160 that supplies the cushion part 140 with gas for inflation and deployment. The cushion portion 140 is inflated and deployed using the gas supplied from the inflator 160, and covers a part of the waist and the thigh of the occupant 150 as illustrated.

  Hereinafter, with reference to FIG. 3, the position of the cushion portion 140 at the time of inflating and deploying will be described while paying attention to the skeleton of the occupant 150. FIG. 3 is a schematic view illustrating the position of the cushion part 140 of FIG. 2 together with the skeleton of the occupant 150. In the figure, a waist 170, a thigh 172, and a knee 174 are mainly shown as the parts of the occupant 150 seated in a normal posture on the seat 120.

  The waist 170 includes an iliac 178 that is part of the pelvis 176. The iliac 178 is located on the back side of the waist 170 as shown. The thigh 172 is a part (range) corresponding to the femur 180 and is located in front of the waist 170. The knee 174 includes a joint located on the front side of the thigh 172.

  As shown by the solid line in the figure, the cushion part 140 is deployed only in front of the part corresponding to the iliac 178 of the occupant 150 (that is, the rear part of the waist part 170) when inflated and deployed. That is, the vehicle rear side end 142 of the cushion portion 140 is located in front of the iliac 178. Therefore, the cushion part 140 does not cover the rear part of the waist part 170 but covers a part, not the whole waist part 170.

  Further, the end 144 of the cushion portion 140 on the vehicle front side is located immediately before the knee portion 174 of the occupant 150, that is, near the rear. As an example, the cushion part 140 covers the area | region including most (for example, 80% or more) of the thigh 172 corresponding to the femur 180 of the passenger | crew 150 as shown in the figure.

  In the airbag 100 according to the present embodiment, the cushion portion 140 covers a portion from the waist portion 170 of the occupant 150 to the vicinity of the rear of the knee portion 174 when inflated and deployed. For this reason, when the cushion part 140 is inflated and deployed, the load that the occupant 150 receives from the cushion part 140 is distributed to a part of the waist 170 of the occupant 150 and most of the thigh 172. Therefore, the load is not concentrated on the entire waist 170 of the occupant 150. Therefore, in the airbag 100, when the cushion part 140 is inflated and deployed, an excessive load is applied to the waist part 170 of the occupant 150, and the occupant protection performance can be improved.

  Further, the cushion portion 140 may be deployed so that the front end 146 of the vehicle is positioned on the front side of the knee portion 174 of the occupant 150 as indicated by a chain line in the figure. In this case, the cushion part 140 covers an area including a part of the waist part 170 of the occupant 150 to the entire knee part 174. Therefore, the load that the occupant 150 receives from the cushion part 140 is distributed over a wide range from a part of the waist part 170 to the entire knee part 174, and does not concentrate on the entire waist part 170 of the occupant 150. Therefore, according to such an airbag 100, occupant protection performance can be further improved.

  The cushion part 140 is deployed only in front of the iliac 178 of the occupant 150 so as not to cover the rear part of the waist 170, but is not limited thereto. As an example, if the cushion part 140 covers most of the thigh part 172 or the entire knee part 174 at the time of inflating and deploying, the cushion part 140 includes a region in the vicinity of the position corresponding to the iliac 178, for example, the rear part of the waist part 170. It may be covered. Even in such a case, the load is distributed over most of the thigh 172 or the entire knee 174 and does not concentrate only on the entire waist 170. For this reason, in the airbag 100, even when the cushion portion 140 covers the entire waist portion 170 during inflation and deployment, the passenger protection performance can be improved in the same manner as described above.

  Hereinafter, with reference to FIG. 4 and FIG. 5, a side collision test using a dummy 182 that imitates a woman will be described. FIG. 4 is a perspective view showing a dummy 182 that imitates the occupant 150. FIG. 5 is a diagram showing a state of a side collision test using the dummy 182 of FIG. FIG. 5A is a diagram illustrating a state of the dummy 182 in a side collision test using the airbag 100. FIG. 5B is a diagram illustrating a state of the dummy 182 in the side collision test using the airbag 200 of the comparative example.

  As shown in FIG. 4, the dummy 182 includes a first sensor 184, a second sensor 186, and a member 188 simulating the femur 180. The first sensor 184 is installed in the vicinity of the iliac 178 located at the rear of the waist 170 shown in FIG. The second sensor 186 is located at the front part of the waist 170. In the side collision test, the total value (input load) of the value detected by the first sensor 184 and the value detected by the second sensor 186 is regarded as an injury value.

  The cushion part 140 of the airbag 100 does not cover the first sensor 184 during inflation and deployment, as indicated by a dotted line in FIG. For this reason, the value detected by the 1st sensor 184 becomes low by using the airbag 100, As a result, the injury value in a side collision test becomes low. The cushion 140 may not cover not only the first sensor 184 but also the second sensor 186. In this way, the injury value in the side collision test can be further reduced.

  Hereinafter, the side collision test will be described with reference to FIG. When the airbag 100 is inflated and deployed, the cushion part 140 is not the entire waist part 190 (the waist part 170 in FIG. 3) of the dummy 182 but the thigh part 192 (the thigh part 172 in FIG. 3) from a part of the waist part 190. ) To cover most of.

  For this reason, in the side collision test using the airbag 100, the dummy 182 as shown by an arrow A in FIG. 5A due to the load received from the door trim portion 132 as the side door 130 (see FIG. 1) enters. The range from the lower back 190 to the knee 194 (the knee 174 in FIG. 3) moves horizontally toward the vehicle interior as a whole.

  On the other hand, the airbag 200 of the comparative example includes a cushion part 210 including an upper chamber 202 and a lower chamber 204 as shown in FIG. The upper chamber 202 is inflated and deployed so as to cover the shoulder 196, the chest, and the abdomen of the dummy 182. On the other hand, the lower chamber 204 covers the entire waist 190 of the dummy 182 but does not cover the thigh 192 when inflated and deployed.

  For this reason, when the airbag 200 is inflated and deployed, the cushion portion 210 does not cover the thigh portion 192 of the dummy 182 but covers the entire waist portion 190 to the shoulder portion 196. Therefore, in the side impact test using the airbag 200, the knee 194 of the dummy 182 does not move and the knee 194 does not move as shown by the arrow B in FIG. In the remaining state, the waist portion 190 to the shoulder portion 196 move to the inside of the vehicle.

  That is, when the airbag 200 is used, the load accompanying the side collision test is absorbed not by the thigh 192 of the dummy 182 but by the entire waist 190. For this reason, the injury value which is the total value of the values detected by the first sensor 184 and the second sensor 186 is increased. Therefore, it is difficult for the airbag 200 to ensure occupant protection performance.

  As described above, even the comparative airbag 200 having the upper chamber 202 in addition to the lower chamber 204 has a high injury value. Therefore, the technique according to Patent Document 1 described above, that is, the upper chamber is not included, and the lumbar portion of the occupant is not included. Even with the technique of restraining the whole and not restraining the thigh, it is expected that the injury value is still increased.

  On the other hand, in the airbag 100 of the present embodiment, the load accompanying the side collision test can be absorbed not by the entire waist portion 190 of the dummy 182 but by most of the waist portion 190 to the thigh portion 192, thereby reducing the injury value. it can. Therefore, in the airbag 100, occupant protection performance can be improved.

  FIG. 6 is a diagram illustrating another airbag 100A. Fig.6 (a) is a figure which shows the state in which the airbag 100A was installed. FIG. 6B is a top view showing a state in which the airbag 100A is inflated and deployed.

  As shown in FIG. 6A, the airbag 100A is different from the airbag 100 in that it is built in a door trim portion 134 of the side door 130A. The side door 130A is located on the vehicle exterior side of the seat 120A serving as the left rear seat. Note that the airbag 100A is preferably not installed, for example, in the door trim portion of the side door 130 (see FIG. 1) that faces the seat 120 serving as the left front seat. This is because it is difficult to inflate and deploy the airbag 100A at an appropriate position because the seat 120 moves in the vehicle front-rear direction.

  In the airbag 100A, as shown by an arrow C in FIG. 6 (b), the cleaved portion 136 of the door trim portion 134 is cleaved, so that the cushion portion 140A is inflated and deployed. At this time, the cushion portion 140A is inflated and deployed so as to cover a region to be protected of the occupant 150 (see FIG. 3) seated on the seat 120A, that is, a region from the waist 170 to the most part of the thigh 172.

  As described above, the load that the occupant 150 receives from the cushion portion 140 is also distributed over a wide range by the airbag 100 </ b> A installed in the door trim portion 134. Therefore, in the airbag 100A, the load is not concentrated on the entire waist portion 170 of the occupant 150, and the occupant protection performance can be improved.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  Moreover, although the example which applied the airbag 100 concerning this invention to the motor vehicle was demonstrated in the said embodiment, it is also possible to apply to an aircraft, a ship, etc. besides a motor vehicle, and can obtain the same effect. it can.

  INDUSTRIAL APPLICABILITY The present invention can be used for an airbag that inflates and deploys between a seat and a side door in a side collision or rollover (rollover) of a vehicle.

DESCRIPTION OF SYMBOLS 100, 100A ... Airbag, 110 ... Vehicle, 120, 120A ... Seat, 130, 130A ... Side door, 132, 134 ... Door trim, 136 ... Ripped part, 140, 140A ... Cushion part, 142 ... End of vehicle rear side , 144, 146 ... the front end of the vehicle, 150 ... occupant, 160 ... inflator, 170, 190 ... waist, 172, 192 ... thigh, 174, 194 ... knee, 176 ... pelvis, 178 ... iliac, 180 ... femur, 182 ... dummy, 184 ... first sensor, 186 ... second sensor, 188 ... member

Claims (2)

An airbag including a cushion portion that inflates and deploys between a seat and a side door using gas,
The cushion portion is in a side view,
Upon deployment of the cushion portion, not covering a region including at least the immediately before the position where the cushion portion corresponds to the knee from the vicinity occupant position corresponding to iliac occupant seated in a normal position on the seat,
The cushion part extends below the occupant's arm part and only forward from a position corresponding to the iliac bone, so that the rear part of the occupant's waist is not covered, and a part of the lumbar part and the occupant's femur are supported. air bag which is characterized in large part and the covering Ukoto of the thigh. The airbag according to claim 1, wherein the region includes the entire position corresponding to a knee portion of an occupant.

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