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CN-122029084-A - Occupant restraint structure

CN122029084ACN 122029084 ACN122029084 ACN 122029084ACN-122029084-A

Abstract

Provided is an occupant protection structure which can properly and sufficiently support the reaction force surface of an airbag cushion when inflated and expanded even when the instrument panel is contracted. The occupant restraint structure (100) is provided with an airbag cushion (10) which is housed in an instrument panel (2) for protecting an occupant (P) and which is inflated and deployed toward the occupant (P) from an opening (41) formed in the upper side of the instrument panel (2), and an airbag cushion (20) which is inflated and deployed toward the occupant (P) from an opening (42) formed in the lower side of the instrument panel (2). In the present occupant restraint structure (100), the relationship shown in (1) is satisfied when the occupant is inflated and deployed, and L2 u+.lib. Wherein L2u represents the accuracy of the upper end (20 u) of the airbag cushion (20), and Lib represents the accuracy of the rear end (2 b) of the instrument panel (2).

Inventors

  • Kamae Nobuyuki
  • Nakashige
  • Jing Banyoumei

Assignees

  • 奥托立夫开发公司

Dates

Publication Date
20260512
Application Date
20241009
Priority Date
20231025

Claims (10)

  1. 1. An occupant restraint structure which is stored in an instrument panel provided on the front side of a vehicle interior in order to protect an occupant in the vehicle interior, and which is provided with; A first airbag cushion that inflates and deploys from a first opening portion formed on an upper side of the instrument panel toward the occupant; a second airbag cushion that inflates and deploys from a second opening portion formed on a lower side of the instrument panel to the occupant; the following formula (1) is satisfied when inflated and deployed: L2u ≧ Lib ...(1) L2u, the upper end accuracy of the second airbag cushion, Lib, the rear end accuracy of the instrument panel.
  2. 2. The occupant restraint structure according to claim 1, wherein, The lower surface of the first airbag cushion is held by at least a portion of the upper surface of the instrument panel and at least a portion of the upper surface of the second airbag cushion upon the inflation and deployment.
  3. 3. The occupant restraint structure according to claim 1 or 2, wherein, The relationship represented by the following formula (2) is satisfied when the inflation and deployment are performed: L2u = Lob ± Δn ...(2) lob, the rear end accuracy of the first opening Δn (Lob-L2 u) absolute value/2.
  4. 4. The occupant restraint structure according to claim 1 or 2, wherein, The relationship represented by the following formula (3) is satisfied when the inflation and deployment are performed: L2u ≧ Lob ...(3)。
  5. 5. the occupant restraint structure according to claim 1 or 2, wherein, And when the inflatable and unfolding, the upper end of the second air bag cushion is abutted against the lower surface of the first air bag cushion.
  6. 6. The occupant restraint structure according to claim 1 or 2, wherein, At the time of inflation and deployment, a recess is formed in a part of the lower surface of the first airbag cushion, and the recess is used for embedding and abutting the upper end of the second airbag cushion.
  7. 7. The occupant restraint structure according to claim 1 or 2, wherein, The upper end of the second airbag cushion is located between a first lower end and a second lower end respectively formed on the lower surface of the first airbag cushion in the front-rear direction of the upper end when the airbag cushion is inflated and deployed.
  8. 8. The occupant restraint structure according to claim 1 or 2, which is configured, A virtual straight line extending through the front end and the rear end of the second airbag cushion when inflated and deployed intersects a vehicle seat on which the occupant sits.
  9. 9. The occupant restraint structure according to claim 1 or 2, wherein, The relationship represented by the following formula (4) is satisfied when the inflation and deployment are performed: P2>P1 ...(4)、 P1 internal pressure of the first airbag cushion And P2, the internal pressure of the second air bag cushion.
  10. 10. The occupant restraint structure according to claim 1 or 2, which is configured, After the second airbag cushion is inflated and deployed, the inflation and deployment of the first airbag cushion are completed.

Description

Occupant restraint structure Technical Field The present invention relates to an occupant restraint structure equipped with an airbag cushion that inflates and deploys in the direction of an occupant in a vehicle when an emergency situation occurs in the vehicle. Background As such an airbag cushion, for example, patent document 1 proposes an occupant protection device in which a passenger seat airbag and a knee airbag are combined, and gas is blown out from an inflator and inflated and deployed from an instrument panel toward the front of the upper body and the front of the legs of an occupant, respectively. The device is configured such that, in a state where the passenger airbag and the knee airbag are fully inflated, the upper end portion of the knee airbag is located at a position 50mm or more higher than the lower end portion of the passenger airbag. As a result, the movement of the passenger airbag is suppressed by the insertion of the lower end portion of the passenger airbag between the inflated upper end portion of the knee airbag and the occupant, and as a result, the movement of the waist portion of the occupant in the forward direction can be suppressed, and the occupant can be sufficiently protected in the event of a vehicle collision. Prior art literature Patent literature Patent document 1 Japanese patent laid-open publication No. 2003-034215 Disclosure of Invention Problems to be solved by the invention However, a conventional instrument panel is generally provided in front of a seat on which an occupant sits, and a vehicle seat is also semi-fixed so as to be movable back and forth, so that the occupant itself faces forward in the traveling direction of the vehicle. Therefore, various devices and many components need to be housed in the instrument panel, resulting in an increase in the external shape and volume thereof. As a result, when the airbag cushion for an occupant, particularly the passenger seat airbag cushion expands and deploys in an emergency of the vehicle, particularly the upper surface of the instrument panel functions as a part of the reaction force surface for holding the airbag cushion. On the other hand, in the future, with the development of technologies such as automatic driving, the possibility of increasing the degree of freedom of movement of the vehicle seat increases, and accordingly, the interior of the vehicle cabin becomes wider and more flexible, and accordingly, the possibility of reducing the shape and volume of the instrument panel increases. Thus, the upper surface of the instrument panel functioning as a part of the reaction force surface of the conventional airbag cushion can be narrowed, and thus, a new structure capable of properly and sufficiently supporting the airbag cushion is desired. However, in response to such a demand, even with the conventional airbag cushion structure described above, since the lower end portion of the passenger airbag is fitted between the upper end portion of the knee airbag and the occupant, the lower support of the passenger airbag is substantially ensured mainly by the legs of the occupant. Therefore, in the conventional airbag cushion structure, when the instrument panel is contracted, there is a case where the reaction force surface of the passenger seat airbag cannot be properly and sufficiently held, and there is a possibility that development of automatic driving or the like cannot be dealt with. Accordingly, the present disclosure has been made in view of the above-described circumstances, and an object thereof is to provide an occupant restraint (protection) structure capable of obtaining a reaction force surface that can properly and sufficiently support an airbag cushion when the airbag cushion is inflated and deployed even in a case where an instrument panel is contracted with the future development of autopilot or the like. Means for solving the problems In order to solve the above-described problems, an occupant restraint structure according to an example of the present disclosure is an occupant restraint structure that is stored in an instrument panel provided in a front side of a vehicle interior (in a normal state) in order to protect an occupant in the vehicle interior, and includes a first airbag cushion that inflates and deploys from a first opening formed in an upper side of the instrument panel to the occupant (in an emergency state of the vehicle), and a second airbag cushion that inflates and deploys from a second opening formed in a lower side of the instrument panel to the occupant. In the present occupant restraint structure, the relationship shown in the following expression (1) is satisfied at the time of inflation and deployment. L2u ≧ Lib ...(1) Where L2u represents the upper end level (level) of the second airbag cushion, and Lib represents the rear end level of the instrument panel. In this structure, the first airbag cushion can be inflated and deployed from the upper side of the instrumen