WO2020238330A1 - 安全气囊和方向盘 - Google Patents

安全气囊和方向盘 Download PDF

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Publication number
WO2020238330A1
WO2020238330A1 PCT/CN2020/079389 CN2020079389W WO2020238330A1 WO 2020238330 A1 WO2020238330 A1 WO 2020238330A1 CN 2020079389 W CN2020079389 W CN 2020079389W WO 2020238330 A1 WO2020238330 A1 WO 2020238330A1
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Prior art keywords
airbag
arc
airbag housing
tear
housing
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PCT/CN2020/079389
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English (en)
French (fr)
Inventor
李艳华
庞静
沈楠
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奥托立夫开发公司
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Application filed by 奥托立夫开发公司 filed Critical 奥托立夫开发公司
Publication of WO2020238330A1 publication Critical patent/WO2020238330A1/zh

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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
    • B60R21/203—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in steering wheels or steering columns
    • 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
    • B60R21/215—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member
    • B60R21/2165—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member characterised by a tear line for defining a deployment opening

Definitions

  • the present invention relates to a safety device in a vehicle, in particular, to an airbag and a steering wheel in the vehicle.
  • Existing automobile airbags include, for example, overhead airbags arranged on the top of the vehicle, airbags arranged in the dashboard, and airbags arranged in the steering wheel (also called driver airbags).
  • the gas generator of the airbag will receive the signal transmitted through the wiring harness connected to the gas generator, and blast occurs. Then, the gas generated by the blast will quickly inflate the folded airbag of the airbag, and the inflated airbag will expand, and then it will rush out from the weakened part (also called the tear part) of the airbag housing. Extend to a predetermined position in front of the occupant, so as to prevent the occupant from being injured by impact.
  • the object of the present invention is to provide an airbag and steering wheel with better outer surface quality.
  • An aspect of the present invention provides an airbag that is configured to be installed in a steering wheel and includes:
  • Air bag which has an expanded state and a storage state
  • An airbag housing for accommodating the airbag in the storage state, and when the airbag is inflated by the gas generator, the airbag tears the tear on the airbag housing Rupture to protrude from the airbag housing,
  • the tearing portion includes an inner side surface on the inner side of the airbag housing, and a cross section of the tearing portion includes multiple arcs at the inner side surface.
  • the multi-segment circular arc includes a first circular arc, a second circular arc, a third circular arc, a fourth circular arc, and a fifth circular arc, a total of five circular arcs.
  • the cross section of the tearing portion includes a line of symmetry
  • the third arc is symmetric about the line of symmetry
  • the first arc and the fifth arc are about the line of symmetry.
  • Symmetrical and the second circular arc and the fourth circular arc are symmetrical about the symmetry line.
  • the first arc and the second arc are circumscribed, and the second arc and the third arc are inscribed.
  • the radius of the first arc is in the range of 0.1-3.0 mm.
  • the radius of the second arc is in the range of 0.1-6.0 mm.
  • the radius of the third arc is in the range of 0.1-3.0 mm.
  • the angle between the two tangents to the third arc is defined as the tear angle, and the tear The angle is in the range of 10°-90°.
  • the tear angle is 30°
  • the radius of the first arc is 1.0mm
  • the radius of the second arc is 3.0mm
  • the radius of the third arc It is 0.5mm.
  • Another aspect of the present invention provides a steering wheel including any of the above-mentioned airbags.
  • Fig. 1 shows a cross-sectional view of a torn portion of an airbag housing in an airbag according to an embodiment of the present invention.
  • Fig. 2 shows the simulation results of the shear stress distributed on the outer surface of the airbag housing at the end of filling under different tearing angles of the airbag housing with a "V"-shaped cross-section tear.
  • Fig. 3 shows the simulation results of the shear stress distributed on the outer surface of the airbag housing at the end of the pressure holding under different tear angles of the airbag housing with a "V"-shaped cross-section tear.
  • Figure 4 shows the simulation results of the sink mark index at various places on the outer surface of the airbag housing at the end of the pressure hold when the airbag housing with a "V"-shaped cross-sectional tear part has different tear angles. .
  • Fig. 5(a) shows the simulation result of the shear stress distributed on the outer surface of the airbag housing at the end of filling according to the airbag housing of the embodiment of the present invention.
  • Fig. 5(b) shows the simulation result of the shear stress distributed on the outer surface of the airbag housing at the end of the pressure holding according to the airbag housing of the embodiment of the present invention.
  • Fig. 5(c) shows the simulation results of the sink mark index at various places on the outer surface of the airbag housing at the end of the pressure holding of the airbag housing according to the embodiment of the present invention.
  • spatially related terms such as “upper”, “lower”, “left” and “right”, etc.
  • spatially related terms can be applied to directions different from those shown in the drawings when used.
  • spatially related terms refer to the directions shown in the drawings for ease of description, those skilled in the art can understand that directions different from those shown in the drawings can be used.
  • the airbag according to the present invention can be installed in a steering wheel to be used as a driver's airbag.
  • the airbag housing of the airbag is used for a part of the steering wheel at the same time, and can also be understood as the middle part of the steering wheel.
  • the airbag according to the present invention includes an airbag, a gas generator, and an airbag housing.
  • the air bag has an expanded state and a stored state, and the gas generator is used to inflate the air bag to expand the air bag to enter the expanded state.
  • the airbag housing is used to accommodate the airbag in the stored state, and when the airbag is inflated by the gas generator, the airbag tears the torn portion on the airbag housing to protrude from the airbag housing. It can be understood that, compared with other parts, the above-mentioned tearing portion functions as a weakened area in the airbag housing, that is, it is easier to be torn when a force is applied.
  • Fig. 1 shows a cross-sectional view of a torn portion of an airbag housing in an airbag according to an embodiment of the present invention.
  • the tear part of the airbag housing in the airbag according to the embodiment of the present invention will be described below with reference to FIG. 1.
  • the airbag housing 100 includes an inner side located at the bottom in FIG. 1 and an outer side located at the upper side in FIG. FIG. 1 cuts the airbag housing 100 in a cutting direction that can show the cross section of the tear part.
  • the cross section of the tear part includes multiple arcs on the inner side surface.
  • the multiple arcs include a first arc 110, a second arc 120, a third arc 130, a fourth arc 140, and a fifth arc 150, a total of five arcs.
  • the tearing portion according to the embodiment of the present invention has a symmetrical structure, and its cross section includes a line of symmetry (the line of symmetry is shown by a dashed line in FIG.
  • the third arc 130 is symmetrical about the line of symmetry, and the first circle
  • the arc 110 and the fifth circular arc 150 are symmetrical about the symmetry line
  • the second circular arc 120 and the fourth circular arc 140 are symmetrical about the symmetry line.
  • the first arc 110 and the second arc 120 are circumscribed
  • at point A the second arc 120 and the third arc 130 are inscribed, symmetrically
  • at point D The fifth circular arc 150 and the fourth circular arc 140 are circumscribed, and at point B, the fourth circular arc 140 and the third circular arc 130 are inscribed.
  • the radius of the first arc 110 is in the range of 0.1-3.0 mm.
  • the radius of the second arc 120 is in the range of 0.1-6.0 mm.
  • the radius of the third arc 130 is in the range of 0.1-3.0 mm.
  • the angle between the two tangents to the third arc 130 is defined as the tear angle, And, the tear angle is in the range of 10°-90°.
  • the angle d between the straight line determined by points A and C and the straight line determined by points B and D is the tear angle in the above definition.
  • the airbag according to the present invention can achieve a small difference in glossiness of the appearance of the airbag housing, thereby achieving the goal of better quality of the outer surface of the airbag housing.
  • the torn part of the airbag housing and its vicinity are studied on the outside of the airbag housing to obtain the result of the difference in appearance gloss between the tearing part and the parts nearby.
  • the only difference is the size of the tear angle.
  • an airbag housing in which the cross section of the tear part is a "V" shape at the inner side is selected.
  • the distance between the tip of the tear part and the outer surface of the airbag housing was set to 0.5 mm.
  • the angle between the "V" inner sides in the cross section of the tear is defined as the tear angle.
  • Figure 2 shows an airbag housing with a tear portion with a "V"-shaped cross section.
  • the tear angles are 15°, 22.5°, 30°, 37.5°, 45°, 60°, 90°, 120°
  • Table 1 shows the maximum shear stress corresponding to each tear angle shown in FIG. 2.
  • Figure 3 shows an airbag housing with a tear portion with a "V" cross-section.
  • the tear angles are 15°, 22.5°, 30°, 37.5°, 45°, 60°, 90°, 120°
  • Table 2 shows the maximum shear stress corresponding to each tear angle shown in FIG. 3.
  • Figure 4 shows an airbag housing with a tear portion with a "V"-shaped cross-section.
  • the tear angles are 15°, 22.5°, 30°, 37.5°, 45°, 60°, 90°, 120°, respectively.
  • Table 3 shows the maximum sink mark index corresponding to each tear angle shown in FIG. 4.
  • the maximum sink mark index at the end of the packing is smaller.
  • a small sink mark index indicates that the appearance of the airbag housing has a small difference in glossiness and a better outer surface quality.
  • the structure of the cross section of the tear portion of the airbag housing at the inner side has been described in detail above with reference to FIG. 1. Similar to the airbag housing with a "V"-shaped cross-section in Figures 2 to 4, in the simulation, the distance between the top end of the torn part of the airbag housing and the outer side of the airbag housing is also designed as 0.5 mm, and the thickness of the airbag housing was set to be the same as the thickness of the airbag housing in the comparative example. Meanwhile, Table 4 shows other parameters of the tear part of the airbag housing according to the embodiment of the present invention.
  • the torn part of the airbag housing and its vicinity are studied on the outside of the airbag housing to The difference in appearance gloss between the torn part and the part near it was obtained.
  • Figure 5(a) shows the airbag housing with the above-mentioned parameters shown in Table 4 according to an embodiment of the present invention.
  • the simulation result of the shear stress distributed on the outer surface of the airbag housing At the end of filling, the simulation result of the shear stress distributed on the outer surface of the airbag housing, and, In this case, the maximum shear stress is 3.0 MPa.
  • Figure 5(b) shows a simulation result of the shear stress distributed on the outer surface of the airbag housing at the end of the pressure keeping with the airbag housing with the above parameters according to an embodiment of the present invention, and in this case The maximum shear stress is 3.05MPa.
  • Figure 5(c) shows the airbag housing with the above-mentioned parameters according to an embodiment of the present invention. When the holding pressure is over, the simulation result of sink mark index everywhere on the outer surface of the airbag housing, and in this case , The maximum sink mark index is 0.034.
  • the airbag housing with the above-mentioned parameters shown in Table 4 according to the embodiment of the present invention is compared with that the tear part is designed to have a "V" cross section.
  • the maximum shear stress distributed on the outer surface of the airbag housing is relatively small.
  • the maximum shear stress distributed on the outer surface of the airbag housing is relatively small.
  • the tear part according to the present invention is designed to have a multi-segment arc cross section, the flow resistance and shear stress of the polymer material can be further reduced, and the cross-sectional thickness mutation and sink mark index can be reduced. Therefore, the airbag according to the present invention
  • the airbag housing has a small difference in appearance gloss and better outer surface quality, thereby making the outer surface quality of the airbag housing according to the present invention better.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)

Abstract

一种安全气囊，包括：气袋，其具有展开状态和收纳状态；气体发生器，其用于对气袋充气以使气袋膨胀而进入展开状态；和气囊壳体（100），其用于容纳在收纳状态中的气袋，并且，当气体发生器对气袋充气时，气袋撕开气囊壳体（100）上的撕裂部以从气囊壳体伸出，其中，撕裂部包括在气囊壳体的内侧的内侧面，撕裂部的横截面在内侧面处包括多段圆弧（110,120,130,140,150）。还公开了一种包括该安全气囊的方向盘。具有上述结构的安全气囊和方向盘的外表面质量较佳。

Description

安全气囊和方向盘 技术领域
本发明涉及车辆中的安全装置，具体地，涉及车辆中的安全气囊以及方向盘。
背景技术
现有的汽车安全气囊包括，例如，布置在车辆顶部的顶置式安全气囊，布置在仪表盘中的安全气囊，以及，布置在方向盘中的安全气囊(也称为驾驶员安全气囊)。当车辆发生碰撞或受到冲击时，安全气囊的气体发生器便会接收到经由连接到气体发生器的线束传送来的信号，从而发生爆破。接着，爆破所产生的气体将使安全气囊的被折叠的气袋迅速充气，充气后的气袋发生膨胀，随即便会从气囊壳体的力薄弱部分(也称为撕裂部)冲出而延伸到乘员前方的预定位置处，从而避免乘员受到冲击所带来的伤害。
然而，在现有技术的驾驶员安全气囊中，气囊壳体的撕裂部的外侧面与气囊壳体的其他区域之间存在明显的外观光泽度差异。由于气囊壳体同时用作车辆的方向盘的一部分，因此，上述外观光泽度差异将导致方向盘的外表面质量不佳。
因此，期望一种具有较佳外表面质量的安全气囊和方向盘。
发明内容
本发明的目的是提供一种具有较佳外表面质量的安全气囊和方向盘。
本发明的一方面提供一种安全气囊，其被构造为安装在方向盘中并且包括：
气袋，其具有展开状态和收纳状态；
气体发生器，其用于对所述气袋充气以使所述气袋膨胀而进入展开状态；和
气囊壳体，其用于容纳在所述收纳状态中的所述气袋，并且，当所述气体发生器对所述气袋充气时，所述气袋撕开所述气囊壳体上的撕裂部以从所述气囊壳体伸出，
其中，所述撕裂部包括在所述气囊壳体的内侧的内侧面，所述撕裂部的横截面在所述内侧面处包括多段圆弧。
根据本发明的实施例，所述多段圆弧包括第一圆弧、第二圆弧、第三圆弧、第四圆弧和第五圆弧总共五段圆弧。
根据本发明的实施例，所述撕裂部的横截面包括对称线，所述第三圆弧关于所述对称线对称，所述第一圆弧和所述第五圆弧关于所述对称线对称，并且，所述第二圆弧和所述第四圆弧关于所述对称线对称。
根据本发明的实施例，所述第一圆弧和所述第二圆弧外切，并且，所述第二圆弧和所述第三圆弧内切。
根据本发明的实施例，所述第一圆弧的半径在0.1-3.0mm的范围内。
根据本发明的实施例，所述第二圆弧的半径在0.1-6.0mm的范围内。
根据本发明的实施例，所述第三圆弧的半径在0.1-3.0mm的范围内。
根据本发明的实施例，在所述第三圆弧的两个端点处，与所述第三圆弧相切的两条切线之间的夹角定义为撕裂角，并且，所述撕裂角在10°-90°的范围内。
根据本发明的实施例，所述撕裂角为30°，所述第一圆弧的半径为1.0mm，所述第二圆弧的半径为3.0mm，并且，所述第三圆弧的半径为0.5mm。
本发明的另一方面提供一种方向盘，其包括任一上述安全气囊。
附图说明
图1示出根据本发明实施例的安全气囊中气囊壳体的撕裂部的剖视图。
图2示出具有“V”形横截面的撕裂部的气囊壳体在不同撕裂角的情形下，填充结束时，气囊壳体的外表面上分布的剪切应力的仿真模拟结果。
图3示出具有“V”形横截面的撕裂部的气囊壳体在不同撕裂角的情形下，保压结束时，气囊壳体的外表面上分布的剪切应力的仿真模拟结果。
图4示出具有“V”形横截面的撕裂部的气囊壳体在不同撕裂角的情形下，保压结束时，气囊壳体的外表面上各处的缩痕指数的仿真模拟结果。
图5(a)示出根据本发明实施例的气囊壳体，在填充结束时，气囊壳体的外表面上分布的剪切应力的仿真模拟结果。
图5(b)示出根据本发明实施例的气囊壳体，在保压结束时，气囊壳体的外表面上分布的剪切应力的仿真模拟结果。
图5(c)示出根据本发明实施例的气囊壳体，保压结束时，气囊壳体的外表面上各处的缩痕指数的仿真模拟结果。
具体实施方式
以下将结合附图描述根据本发明的安全气囊和方向盘的具体实施方式。下面的详细描述和附图用于示例性地说明本发明的原理，本发明不限于所描述的优选实施例，本发明的保护范围由权利要求书限定。
此外，空间相关术语(诸如“上”、“下”、“左”和“右”等)用于描述附图所示的元件与另一个元件的相对位置关系。因此，空间相关术语可以应用到使用时与附图所示的方向不同的方向中。显然，虽然为了易于说明，所有这些空间相关术语指的是附图所示的方向，但是本领域技术人员能够理解可以使用与附图中所示的方向不同的方向。
需要说明的是，根据本发明的安全气囊可以用于安装在方向盘中，以用作驾驶员安全气囊。本领域技术人员能够理解，在这种情况下，安全气囊的气囊壳体同时用于方向盘的一部分，也可以理解为方向盘的中间部分。
根据本发明的安全气囊包括气袋、气体发生器和气囊壳体。气袋具有展开状态和收纳状态，气体发生器用于对气袋充气以使气袋膨胀而进入展开状态。以及，气囊壳体用于容纳在收纳状态中的气袋，并且，当气体发生器对气袋充气时，气袋撕开气囊壳体上的撕裂部以从气囊壳体伸出。能够理解，与其他部分相比，上述撕裂部作为气囊壳体中的力薄弱区起作用，即，在受到力时更容易被撕开。
图1示出根据本发明实施例的安全气囊中气囊壳体的撕裂部的剖视图。以下参照图1描述根据本发明实施例的安全气囊中气囊壳体的撕裂部。
如图1所示，气囊壳体100包括位于图1中下方的内侧和位于图1中上方的外侧，并且，撕裂部设置在气囊壳体100的内侧的内侧面上。图1以能够示出撕裂部的横截面的剖切方向对气囊壳体100进行剖切，能够观察到，撕裂部的横截面在内侧面处包括多段圆弧。具体地，多段圆弧包括第一圆弧110、第二圆弧120、第三圆弧130、第四圆弧140和第五圆弧150总共五段圆弧。并且，根据本发明实施例的撕裂部为对称结构，其横截面包括对称线(在图1中以点划线示出该对称线)，第三圆弧130关于对称线对称，第一圆弧110和第五圆弧150关于对称线对称，以及，第二圆弧120和第四圆弧140关于对称线对称。而且，在C点处，第一圆弧110和第二圆弧120外切，以及，在A点处，第二圆弧120和第三圆弧130内切，对称地，在D点处，第五圆弧150和第四圆弧140外切，以及，在B点处，第四圆弧140和第三圆弧130内切。
根据本发明的优选实施例，第一圆弧110的半径在0.1-3.0 mm的范围内。
根据本发明的优选实施例，第二圆弧120的半径在0.1-6.0 mm的范围内。
根据本发明的优选实施例，第三圆弧130的半径在0.1-3.0 mm的范围内。
根据本发明的优选实施例，在第三圆弧130的两个端点处(A点和B点)，与第三圆弧130相切的两条切线之间的夹角定义为撕裂角，并且，撕裂角在10°-90°的范围内。具体地，在图1所示的情形中，由点A和点C确定的直线与由点B和点D确定的直线之间的夹角d即上述定义中的撕裂角。
以下描述根据本发明的安全气囊能够实现气囊壳体的外观光泽度差异小，由此实现气囊壳体的外表面质量较佳的目的。
利用仿真模拟的方法，在气囊壳体的外侧，对气囊壳体的撕裂部以及其附近的部分进行研究，以获得撕裂部及其附近的部分之间的外观光泽度差异的结果。采用完全相同的模拟参数，不同的仅仅是撕裂角的大小。
在对比示例中，选择撕裂部的横截面在内侧面处为“V”形的形状的 气囊壳体。并且，将该撕裂部的顶端距气囊壳体的外侧面的距离设定为0.5mm。在“V”形横截面的撕裂部中，将撕裂部的横截面中的“V”内侧面之间的夹角定义为撕裂角。
图2示出具有“V”形横截面的撕裂部的气囊壳体，分别在撕裂角为15°、22.5°、30°、37.5°、45°、60°、90°、120°的“V”形横截面的情形下，填充结束时，气囊壳体的外表面上分布的剪切应力的仿真模拟结果。并且，表1给出与图2所示的各个撕裂角相应的最大剪切应力。
表1
Figure PCTCN2020079389-appb-000001
能够看出，在30°撕裂角的“V”形横截面的情形下，填充结束时最大剪切应力较小。剪切应力较小表明，气囊壳体的外观光泽度差异小，外表面质量较佳。
图3示出具有“V”形横截面的撕裂部的气囊壳体，分别在撕裂角为15°、22.5°、30°、37.5°、45°、60°、90°、120°的“V”形横截面的情形下，保压结束时，气囊壳体的外表面上分布的剪切应力的仿真模拟结果。并且，表2给出与图3所示的各个撕裂角相应的最大剪切应力。
表2
Figure PCTCN2020079389-appb-000002
能够看出，在45°撕裂角的“V”形横截面的情形下，保压结束时最 大剪切应力较小。剪切应力较小表明，气囊壳体的外观光泽度差异小，外表面质量较佳。
图4示出具有“V”形横截面的撕裂部的气囊壳体，分别在撕裂角为15°、22.5°、30°、37.5°、45°、60°、90°、120°的“V”形横截面的情形下，气囊壳体的外表面上各处的缩痕指数的仿真模拟结果。并且，表3给出与图4所示的各个撕裂角相应的最大缩痕指数。
表3
Figure PCTCN2020079389-appb-000003
能够看出，在30°撕裂角的“V”形横截面的情形下，保压结束时最大缩痕指数较小。缩痕指数小表明，气囊壳体的外观光泽度差异小，外表面质量较佳。
综合图2-图4和以上表1-表3所示的仿真模拟结果，能够发现，当撕裂部设计为具有30°撕裂角的“V”形横截面时，气囊壳体的外观光泽度差异最小，外表面质量最佳。因此，将具有30°撕裂角的“V”形横截面的气囊壳体作为根据本发明的气囊壳体的比较基础。
对于根据本发明的安全气囊，已经在上文参照图1详细地描述了气囊壳体的撕裂部的横截面在内侧面处的结构。与图2-图4中具有“V”形横截面的气囊壳体相同，在仿真模拟时，根据本发明的气囊壳体的撕裂部的顶端距气囊壳体的外侧面的距离同样设计为0.5mm，以及，气囊壳体的厚度设定为与对比示例中的气囊壳体的厚度相同。同时，表4示出根据本发明实施例的气囊壳体的撕裂部的其他参数。
表4
Figure PCTCN2020079389-appb-000004
针对根据本发明实施例的具有表4所示的上述参数的气囊壳体，利用仿真模拟的方法，在气囊壳体的外侧，对气囊壳体的撕裂部以及其附近的部分进行研究，以获得撕裂部及其附近的部分之间的外观光泽度差异。
图5(a)示出根据本发明实施例的具有表4所示的上述参数的气囊壳体，在填充结束时，气囊壳体的外表面上分布的剪切应力的仿真模拟结果，并且，在这种情形下，最大剪切应力为3.0MPa。图5(b)示出根据本发明实施例的具有上述参数的气囊壳体，在保压结束时，气囊壳体的外表面上分布的剪切应力的仿真模拟结果，并且，在这种情形下，最大剪切应力为3.05MPa。图5(c)示出根据本发明实施例的具有上述参数的气囊壳体，保压结束时，气囊壳体的外表上各处的缩痕指数的仿真模拟结果，并且，在这种情形下，最大缩痕指数为0.034。
由此，在气囊壳体的其余参数相同的前提下，与撕裂部设计为具有“V”横截面相比，根据本发明实施例的具有表4所示的上述参数的气囊壳体，在填充结束时，气囊壳体的外表面上分布的最大剪切应力较小，保压结束时，气囊壳体的外表面上分布的最大剪切应力较小，并且，保压结束时，气囊壳体的外表上的最大缩痕指数无明显差别。由于根据本发明的撕裂部设计为具有多段圆弧的横截面，能够进一步降低高分子材料的流动阻力以及剪切应力，减少截面厚度突变和缩痕指数，因此，根据本发明的安全气囊中，气囊壳体的外观光泽度差异小，外表面质量较佳，由此使得根据本发明的气囊壳体的外表面质量较佳。
如前所述，尽管说明中已经参考附图对本发明的示例性实施例进行了说明，但是本发明不限于上述具体实施方式，本发明的保护范围应当由权利要求书及其等同含义来限定。

Claims (10)

  1. 一种安全气囊，其被构造为安装在方向盘中并且包括：
    气袋，其具有展开状态和收纳状态；
    气体发生器，其用于对所述气袋充气以使所述气袋膨胀而进入展开状态；和
    气囊壳体，其用于容纳在所述收纳状态中的所述气袋，并且，当所述气体发生器对所述气袋充气时，所述气袋撕开所述气囊壳体上的撕裂部以从所述气囊壳体伸出，
    其中，所述撕裂部包括在所述气囊壳体的内侧的内侧面，所述撕裂部的横截面在所述内侧面处包括多段圆弧。
  2. 根据权利要求1所述的安全气囊，其中，所述多段圆弧包括第一圆弧、第二圆弧、第三圆弧、第四圆弧和第五圆弧总共五段圆弧。
  3. 根据权利要求2所述的安全气囊，其中，所述撕裂部的横截面包括对称线，所述第三圆弧关于所述对称线对称，所述第一圆弧和所述第五圆弧关于所述对称线对称，并且，所述第二圆弧和所述第四圆弧关于所述对称线对称。
  4. 根据权利要求3所述的安全气囊，其中，所述第一圆弧和所述第二圆弧外切，并且，所述第二圆弧和所述第三圆弧内切。
  5. 根据权利要求4所述的安全气囊，其中，所述第一圆弧的半径在0.1-3.0mm的范围内。
  6. 根据权利要求5所述的安全气囊，其中，所述第二圆弧的半径在0.1-6.0mm的范围内。
  7. 根据权利要求6所述的安全气囊，其中，所述第三圆弧的半径在0.1-3.0mm的范围内。
  8. 根据权利要求7所述的安全气囊，其中，在所述第三圆弧的两个端点处，与所述第三圆弧相切的两条切线之间的夹角定义为撕裂角，并且，所述撕裂角在10°-90°的范围内。
  9. 根据权利要求8所述的安全气囊，其中，所述撕裂角为30°，所述 第一圆弧的半径为1.0mm，所述第二圆弧的半径为3.0mm，并且，所述第三圆弧的半径为0.5mm。
  10. 一种方向盘，其包括根据权利要求1-9中任一项所述的安全气囊。
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19980067866A (ko) * 1997-02-13 1998-10-15 이웅열 자동차용 에어백 커버
JPH1120590A (ja) * 1997-06-30 1999-01-26 Nippon Plast Co Ltd エアバッグ装置のカバー体
US5957483A (en) * 1996-12-21 1999-09-28 Trw Automotive Safety Systems Gmbh Covering for an airbag module
JP2006347393A (ja) * 2005-06-16 2006-12-28 Honda Motor Co Ltd エアバッグ開口部構造
JP2012006488A (ja) * 2010-06-25 2012-01-12 Nippon Plast Co Ltd エアバッグカバー体
CN103183000A (zh) * 2012-01-03 2013-07-03 现代摩比斯株式会社 安全气囊盖板

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5957483A (en) * 1996-12-21 1999-09-28 Trw Automotive Safety Systems Gmbh Covering for an airbag module
KR19980067866A (ko) * 1997-02-13 1998-10-15 이웅열 자동차용 에어백 커버
JPH1120590A (ja) * 1997-06-30 1999-01-26 Nippon Plast Co Ltd エアバッグ装置のカバー体
JP2006347393A (ja) * 2005-06-16 2006-12-28 Honda Motor Co Ltd エアバッグ開口部構造
JP2012006488A (ja) * 2010-06-25 2012-01-12 Nippon Plast Co Ltd エアバッグカバー体
CN103183000A (zh) * 2012-01-03 2013-07-03 现代摩比斯株式会社 安全气囊盖板

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