WO2012051876A1 - 汽车安全气囊的气体分流装置 - Google Patents

汽车安全气囊的气体分流装置 Download PDF

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Publication number
WO2012051876A1
WO2012051876A1 PCT/CN2011/078075 CN2011078075W WO2012051876A1 WO 2012051876 A1 WO2012051876 A1 WO 2012051876A1 CN 2011078075 W CN2011078075 W CN 2011078075W WO 2012051876 A1 WO2012051876 A1 WO 2012051876A1
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WO
WIPO (PCT)
Prior art keywords
gas
flow dividing
cylindrical body
generating device
sewing thread
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.)
Ceased
Application number
PCT/CN2011/078075
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English (en)
French (fr)
Inventor
萨格克罗蒂亚
陈国梁
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Autoliv Development AB
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Autoliv Development AB
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Publication date
Application filed by Autoliv Development AB filed Critical Autoliv Development AB
Priority to CN201180042635.2A priority Critical patent/CN103079907B/zh
Publication of WO2012051876A1 publication Critical patent/WO2012051876A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R21/261—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow with means other than bag structure to diffuse or guide inflation fluid
    • 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
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R21/261—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow with means other than bag structure to diffuse or guide inflation fluid
    • B60R2021/2612—Gas guiding means, e.g. ducts
    • 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
    • B60R21/217—Inflation fluid source retainers, e.g. reaction canisters; Connection of bags, covers, diffusers or inflation fluid sources therewith or together
    • 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
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/233—Inflatable members characterised by their shape, construction or spatial configuration comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other

Definitions

  • the present invention relates to a component for car safety, and in particular to a gas splitting device for directing gas from a gas generating device into a gas chamber.
  • the safety air is supplied by the gas generating device and inflated to form a cushioned soft protection between the occupant and the outside world (e.g., the vehicle).
  • the gas flow dividing device is used to achieve the above object.
  • the above object is achieved by, for example, the disclosed U.S. Patent No. 5,573,270 A, at the gas inlet of the gas, using an X or Y type flow dividing device.
  • the device is a fabric having a large area covering the air inlet of the air, and the edge portion thereof is fixed on the air sill by the sewing thread, and the other portion except the edge has a gap between the air vent, thus forming a similar manner as described above.
  • X or Y type fixing method At the same time, the gas from the gas generator is prohibited from entering the air enthalpy at the sewing place, and the gas can be guided into the air vent through the above gap, thereby achieving the purpose of adjusting the gas venting area and the inflation process.
  • the gas generated by the gas generator is usually a high-temperature, high-pressure gas, and the front surface of the flow dividing device and the fixed portion of the edge are subjected to a large impact.
  • the sewing thread in the above patent structure may be destroyed by gas and lose its regulation effect. It is therefore necessary to provide a flow dividing device with a firm structure.
  • the upper and lower air sputum protect the chest and the hip respectively, and the inflation process is mostly from the bottom up, or the gas with a large pressure is provided in the lower air sac cavity to protect More important hips.
  • the flow dividing device is usually located at the inlet of the lower air vent, diverting the gas upwards and downwards. The gas that is diverted downward fills the lower gas chamber, and the gas that is branched upward passes through the hole in the upper and lower gas chambers and enters the upper gas chamber. If the shunt device is broken, it will affect the above-mentioned inflation process, and the amount of inflation in the upper chamber will not be guaranteed.
  • an object of the present invention is to provide a gas flow dividing device which is simple in structure and convenient in processing; and the gas distributing device can withstand higher pressure without being damaged; in addition, the gas distributing device can be better.
  • the multi-cavity gas enthalpy is adjusted to adjust the inflation process; and the shunt device should also have the characteristics of being fast and firmly fixed and fixed with the gas enthalpy and the gas generator.
  • the present invention provides a gas flow dividing device built in a safety air passage of a vehicle, wherein a gas generating device inflates the gas cylinder through the gas distributing device, and the gas distributing device has a gas trap fixed thereto.
  • the gas flow dividing device being a cylindrical body, the fixed portion as a part of the cylindrical body of the flow dividing device and the gas passage passing through at least one sewing thread Stitching is fixed, and gas guiding as another part of the cylindrical body Part of the continuous surface in which the sewing thread is not provided, the gas from the gas generating device enters the gas enthalpy along the gas guiding portion to inflate the gas enthalpy.
  • the flow dividing device is a cylindrical body formed by the opposite ends of the flexible fabric, and the body wall of the cylindrical body includes at least an overlapping layer formed by overlapping the fabrics in the radial direction. section.
  • the fixing portions are all composed of or partially composed of overlapping layers.
  • the fixed suture When such radially overlapping body walls are machined by themselves or fixed with a gas cylinder, the fixed suture will also be in a radial direction. Since the impact force of the flow dividing device when guiding the gas mainly propagates radially outward, the stitching and fixing thereof are not easily broken by the impact gas, and the shunt structure can be better maintained.
  • the flow dividing device is a flexible fabric and is circumferentially surrounded by opposite edge portions thereof to form the cylindrical body, the body wall of the cylindrical body including at least the radial overlap of the fabric And the overlapping layer portion is formed.
  • the fixed portions are all composed of or partially composed of overlapping layer portions.
  • the gas guiding portion is composed of at least one layer of the flexible fabric.
  • the gas guiding portion has a recess that is recessed in the axial direction.
  • the at least one sewing thread includes end sewing threads at both ends in the axial direction of the flow dividing device, the end sewing threads being diametrically opposed to the notches of the gas guiding portion.
  • the fixing portion further includes a mounting hole for assembling the gas generating device, and the at least one sewing thread further includes a sewing thread for a mounting hole that sewn the fixing portion to the air squeegee around the mounting hole.
  • the gas generating device is placed in the gas flow dividing device along the axial direction of the gas distributing device, at the entry end of the flow dividing device where the gas generating device is placed, the fixed portion
  • the inner layer facing the gas generating device has an axially outwardly projecting strip that is sewn to the gas pocket to guide the gas generating device into the flow dividing device.
  • the gas generating device is placed in the gas flow dividing device along the axial direction of the gas distributing device, and at the inlet end of the flow dividing device where the gas generating device is placed, the gas guiding portion
  • the fixing portion is shorter than the fixing portion so that the fixing portion is exposed to the gas guiding portion to form an exposed portion, and the end sewing thread extends along an edge of the exposed portion.
  • the gas guiding portion that guides the flow of the gas does not provide the sewing thread, when the gas flows through the gas guiding portion, the gas guiding portion can withstand a higher gas pressure and is less likely to be damaged by the airflow impact. Thereby, the air enthalpy can be inflated smoothly.
  • FIG. 1 Schematic diagram of the operation between the flow dividing device of the present invention and the car safety air;
  • Figure 2 is a schematic view of the flow dividing device of the present invention in Figure 1;
  • Figure 3 is a schematic view showing the manufacture of the flow dividing device of the present invention.
  • Figure 4 is a perspective view of the flow dividing device of the present invention.
  • Fig. 1 is a schematic view showing the operation of the gas distributing device 2 of the present invention in the vehicle safety air cylinder 1
  • Fig. 2 is a schematic view showing the gas distributing device of the invention of Fig. 1.
  • the gas flow dividing device 2 according to the present invention is built in the car safety air cylinder 1 and has a fixed portion 21 fixed to the air cylinder 1 and placed in the air cylinder 1
  • the gas guiding portion 22, wherein: the gas dividing device 2 is a cylindrical body.
  • an air outlet of a gas generating device for inflating the gas cylinder 1 is located inside the gas distributing device 2, so that gas from the gas outlet port will pass through the gas distributing device 2, and
  • the gas guiding portion 22 of the gas flow dividing device 2 guides the diversion into the gas cylinder.
  • the fixed portion 21 as a part of the cylindrical shape of the gas distributing device 2 is fixed to the gas cylinder 1, and is preferably fixed at both end portions in the axial direction of the gas distributing device 2.
  • the fixing portion 21 is fixed to the air ⁇ 1 by at least one sewing thread.
  • the gas guiding portion 22 as another portion of the cylindrical body and the fixing portion 21 extend in the axial direction of the gas flow dividing device 2 and are diametrically opposed.
  • the axial direction here is relative to the gas flow dividing device 2 as a cylindrical body, that is, the axial direction of the cylindrical body.
  • the gas distributing device 2 is located in the gas cylinder 1 and has a fixed portion 21 fixed to the gas cylinder 1 and a gas guiding portion 22 disposed in the gas cylinder 1; the gas distributing device 2 in the present invention is a cylindrical body An air outlet of the gas generating device that inflates the gas cylinder 1 is located inside the gas flow dividing device 2. Therefore, the gas generated by the gas generating device will be diverted and guided along the inside of the cylindrical body.
  • the gas distributing means 2 is in the shape of a cylindrical body and the gas generating means is located therein, which forms a clear gas branching path. The above structure will facilitate the splitting of the gas when the gas is inflated.
  • the gas shock received by the gas distributing device 2 is outward from the inside of the cylindrical body in the radial direction, and the internal impact from a plurality of axial directions makes the gas distributing device 2 as a whole relatively less resistant to the gas.
  • the force that the gas pulls the gas splitting device 2 to disengage from the gas cylinder 1 is small, that is, the gas pressure received by the fixed portion 21 will cancel the tensile force generated by the gas guiding portion 22. Therefore, the fixed portion and the gas cylinder 1 are not easily damaged, and there is no phenomenon in the prior art that only the gas guiding portion is subjected to the impact of the gas, and the fixed portion is pulled to cause the fixed portion to be detached. Therefore, the positional relationship between the gas splitting device 2 and the gas cylinder 1 is maintained, which is the primary condition for realizing the splitting function.
  • the gas flow dividing device 2 of the present invention can be sewn from a flexible fabric material.
  • the gas splitting device 2 is made of a flexible silicone coated fabric.
  • FIG. 3 is a schematic view showing the manufacture of the gas flow dividing device of the present invention.
  • the flow dividing device 2 of the present invention is An overlapping layer portion, the two edge portions of the fabric are staggered in the circumferential direction thereby overlapping in the radial direction to form the overlapping layer portion.
  • the main body of the gas generating device as described above, including the gas outlet port, is located in the gas splitting device 2 of the cylindrical body.
  • the impact force of the gas distributing device 2 when guiding the gas is mainly Propagating radially outward, the radial suture at the portion of the radially overlapping layer is subjected to a small impact force, so that the stitching and fixing are not easily broken by the impact gas, and the shunt structure can be better maintained.
  • the fixed portion 21 is entirely composed of or partially composed of overlapping layer portions.
  • the fixing portions 21 are all composed of overlapping layer portions, which not only allows the processing and sewing of the gas distributing device 2 itself and the fixing with the gas cylinder 1 to be completed by one process, but also makes the gas distributing device 2 the same.
  • the fixed contact surface between them and the contact surface of the gas distributing device 2 and the gas generating device are more flat, the fixing is smoother, and the gas resistance is small.
  • the fixed portion 21 fixed to the gas cylinder 1 and the gas guiding portion 22 disposed in the gas cylinder 1 are also woven materials.
  • the fixing manner between the gas distributing device 2 and the gas cylinder 1 is usually sewn and fixed by a sewing thread, and the gas from the gas generating device is also released along the guiding portion 22 to realize the splitting.
  • the fixing portion 21 is sewn and fixed to the gas cylinder 1 by the end sewing thread 4.
  • the gas flow dividing device 2 of the present invention only needs to perform simple sewing fixing on both end portions thereof to achieve an effective impact resistance effect, and the sewing area at both ends also facilitates the use of the sewing device, and is free from the occurrence of sewing error. Mistakes.
  • the sewing thread to be used may be not limited to the above-mentioned end sewing thread 4, but may be preferably used in other positions of the fixing portion 21.
  • the sewing thread is fixed for better stitching.
  • two holes of equal height may be disposed at an intermediate height portion of the flexible fabric. After the flexible fabric surrounds the cylindrical body, the two holes overlap to form mutually overlapping inner and outer holes.
  • the sewing thread is not provided around the inner hole, and the periphery of the outer hole is sewn and fixed to the gas wall by the sewing thread 5 of the mounting hole.
  • the inner hole has a hole diameter slightly larger than the outer hole diameter to facilitate insertion and alignment of the gas generating device.
  • the positions of the inner and outer holes can be designed according to the size of the gas generating device.
  • the inner side of the gas guiding portion 22 in the gas cylinder 1, that is, the side facing the gas generating device, is a continuous surface. Since the inner side is directly in contact with the split gas, the impact force of the gas is uniform after the continuous surface is used, which is advantageous for maintaining the structure of the cylindrical body to realize the shunt function.
  • the above structure avoids the phenomenon that the gas guiding portion of the prior art is destroyed by gas due to the suture.
  • the gas splitting device 2 is a flexible fabric, twenty two , .
  • the degree of firmness of the body guiding portion 22 reduces the likelihood of its damage by gas impact.
  • the gas guiding portion 22 has a notch 24 inward in the axial direction. More specifically, the notch 24 is diametrically opposed to the end sewing thread 4 to expose the end sewing thread 4 to the outside of the gas guiding portion 22. Due to the inward recess 24 at both ends, the gas in the gas generating device is preliminarily punched out of the gas guiding portion 22 while being at both ends of the fixed portion 21 opposite to the gas guiding portion 22. With the fixed end sewing thread 4, since the gas at the end is released in advance, the impact force on the fixed portion is also reduced in advance, and the fixed sewing thread 4 is relatively firmer.
  • the gas cartridge 1 to which the present invention is applied is a side gas chamber having two upper and lower chambers, and the main portion of the gas generating device is also placed in the gas flow dividing device 2. internal.
  • the gas splitting device 2 is disposed in the lower chamber 11.
  • the gas splitting device 2 may be disposed between the upper chamber 12 and the lower chamber 11.
  • the axial direction of the gas splitting device 2 is directed to the upper chamber 12 and the lower chamber 11. This arrangement will cause the gas generated by the generating device to first fill the lower chamber 11 and then fill the upper chamber 12, that is, the gas branched from the gas distributing device 2 first enters the lower chamber 11, and the gas portion branched from the upper end passes through the upper and lower portions.
  • the bifurcation 13 of the cavity enters the upper chamber 12, which ensures the protection of the hips and the chest of the human body, in particular, the protection of the hips. Since the gas flow dividing device 2 of the present invention is firm and reliable, it can maintain its shape against a large pressure and temperature air flow when inflated, so that different inflation and shunting requirements of a plurality of cavities can be satisfactorily satisfied.
  • the gas cartridge 1 can also be formed as a single chamber in which the gas splitting device 2 is disposed.
  • the gas generating device is placed inside the gas distributing device 2 along the axial direction of the gas distributing device 2, and the gas generating device is placed At the entry end of the gas distributing device 2, the inner layer of the fixing portion 21 facing the gas generating device has an axially outwardly protruding strip 23, and the protruding strip 23 is sewn and fixed in the The gas cylinder 1 is directed to guide the gas generating device into the gas flow dividing device 2.
  • the present invention does not necessarily have to provide the protruding strips 23, when the gas generating device is installed, the gas generating means will follow the protruding strips due to the guiding of the protruding strips 23 on the gas cylinder 1 by sewing. 23 is introduced into the gas flow dividing device 2 without placing the gas generating device outside the gas flow dividing device 2 to form a substantial failure mode. Further, the sewing thread on the projecting strip 23 serves to fix the projecting strip and the gas wall, so that the gas generating means is less likely to be mistakenly inserted between the overlapping layer portions of the fixed portion.
  • the projecting strip 23 is located at both ends of the fixed portion 21, that is, at the upper end of the cylindrical body between the fixed portion 21 and the gas guiding portion 22.
  • the limiting action of the bulging strips 23 will ensure that the gas generating means is installed within the gas dividing means 2 to ensure that the gas dividing means 2 can function as a splitting gas.
  • the advantage of providing the protruding strip 23 is that if the protruding strip 23 is not provided, it is necessary to sew the fixing portion 21 with a higher-level sewing tool. Combined, resulting in increased costs.
  • the present invention provides a gas shut-off device for a safe air of a vehicle, which is built in the air enthalpy and has a fixed portion fixed on the air raft and placed in the air sump a gas guiding portion, the gas distributing device is a cylindrical body, and an air outlet of the gas generating device that inflates the gas cylinder is located inside the flow dividing device at both ends in an axial direction of the gas distributing device,
  • the gas guiding portion has a recess inward in the axial direction.
  • the gas shunting device of the cylindrical body will be subjected to the gas impact force from all directions of the gas generating device, and the fixed portion is subjected to the pressure to offset the tensile force generated by the gas guiding portion, and in the embodiment,
  • the inwardly facing notch feature in the axial direction will also disperse the tension generated by the gas guiding portion at the gas outlet end, so that the fixed portion will facilitate the fixation between the gas and the gas, and the entire gas splitting device will maintain its overall shape. , to achieve the shunt guidance of the gas.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)

Description

技术领域
本发明涉及一种汽车安全气嚢的部件， 特别是引导自气体发生装置的气体进入气嚢的气体分 流装置。 背景技术
作为车辆的安全防护装置， 安全气嚢由气体发生装置提供气体并充气膨胀， 以在乘员和外界 (例如车辆）之间形成緩冲的软保护。 为了控制气体进入气嚢的方向以在充气过程中得到更好的 气嚢形状进而提供可控的保护， 人们釆用气体分流装置来实现上述目的。
例如已知公开的美国专利 US5573270A中在气嚢的进气口处釆用 X或 Y型的分流装置实现上 述目的。该装置为一块具有较大面积的覆盖于气嚢进气口的织物， 其边缘部分通过缝纫线固定在 气嚢上， 而除边缘外的其他部分与气嚢间具有空隙， 因此形成类似上述的 X型或 Y型的固定方 式。 同时自气体发生器的气体在缝纫处被禁止进入气嚢， 而气体可以通过上述间隙被引导进入气 嚢， 以此达到调节气嚢充气区域和充气过程的目的。
很明显， 保持缝纫线处的牢固固定是实现调整气流方向的前提。 而气体发生器所产生的气体 通常为高温、 高压气体， 分流装置的正面和边缘的固定处都受到较大的冲击， 上述专利结构中的 缝纫线有被气体破坏而失去其调节作用的可能。 因此需要提供一个具有牢固结构的分流装置。
同时在多腔气嚢中，这种失效所造成的后果更加严重。例如在具有上下气嚢腔的侧面气嚢中， 上下气嚢分别保护胸和髋部，其充气过程也多是自下向上充气，或者提供较大压力的气体于下气 嚢腔中， 以保护较为重要的髋部。 在侧面气嚢中， 分流装置通常位于下气嚢的进气口， 将气体向 上、 向下两个方向分流。 向下分流的气体填充下气嚢腔， 向上分流的气体经过上下气嚢腔的分隔 上的孔进入上气嚢腔。 如果分流装置破坏， 将影响上述的充气过程， 上腔充气量将得不到保障。 发明内容
为解决上述技术问题， 本发明的目的是提供一种结构简单、加工方便的气体分流装置； 同时 该气体分流装置能够耐受较高的压力而不被破坏；另外该气体分流装置能够更好的解决多腔气嚢 的充气过程调节； 而该分流装置还应具有同气嚢、 气体发生器快速、 牢固安装固定的特点。
为此本发明提供一种内置于汽车安全气嚢中的气体分流装置，其中，一气体发生装置经所述 气体分流装置向所述气嚢充气，所述气体分流装置具有固定在所述气嚢上的固定部分和置于所述 气嚢内的气体引导部分，所述气体分流装置为筒形体，作为所述分流装置的筒形体的一部分的所 述固定部分与所述气嚢通过至少一条缝纫线缝合固定，而作为所述筒形体的另一部分的气体引导 部分为不设置缝纫线的连续面，来自所述气体发生装置的气体沿着气体引导部分进入所述气嚢以 对所述气嚢充气。
作为改进，所述分流装置是由所述柔性织物的两端部相对中心环绕而形成的筒形体， 所述筒 形体的体壁至少包含由所述织物在径向方向上重叠而形成的重叠层部分。 作为更进一步的改进， 所述固定部分全部由重叠层组成或者部分由重叠层组成。
这种径向重叠的体壁在其本身加工或同气嚢固定时， 固定的缝合线也将是径向的方向。 由于 分流装置在引导气体时所受到的冲击力主要沿着径向向外传播，因此其缝合和固定不易被冲击气 体所破坏， 能够更好的保持分流结构。
优选地，所述分流装置是釆用柔性织物， 并由其相对的两边缘部分相对中心环绕以形成所述 筒形体， 所述筒形体的体壁至少包含由所述织物在径向方向上重叠而形成的重叠层部分。
优选地， 所述固定部分全部由重叠层部分组成或者部分由重叠层部分组成。
优选地， 所述气体引导部分由至少一层的所述柔性织物构成。
优选地，在所述分流装置的轴向方向上的两端部处， 所述气体引导部分具有沿轴向方向内陷 的凹口。
更优选地， 所述至少一条缝纫线包括位于所述分流装置的轴向方向上的两端部的端部缝纫 线， 所述端部缝纫线与所述气体 I导部分的凹口径向相对。
优选地，所述固定部分还包括用于装配气体发生装置的安装孔，所述至少一条缝纫线还包括 环绕所述安装孔将所述固定部分与所述气嚢缝纫固定的安装孔缝纫线。
优选地，所述气体发生装置沿所述气体分流装置的轴向被置于所述气体分流装置之内，在放 置所述气体发生装置的所述分流装置的进入端处，所述固定部分的面向所述气体发生装置的内层 具有沿轴向向外的凸出条，所述凸出条缝纫固定在所述气嚢上以引导所述气体发生装置进入所述 分流装置内。
优选地，所述气体发生装置沿所述气体分流装置的轴向被置于所述气体分流装置之内，在放 置所述气体发生装置的所述分流装置的进入端处，所述气体引导部分短于所述固定部分，从而使 所述固定部分露出于所述气体引导部分而形成一露出部分，所述端部缝纫线沿该露出部分的边缘 延伸。
在本发明的实施例中， 由于引导气体流动的气体引导部分不设置缝纫线， 因此， 当气体流过 该气体引导部分时， 气体引导部分能够经受较高的气体压力， 不易被气流冲击破坏， 从而能够平 稳地对气嚢进行充气。
上述凹口特征将使在所述气体引导部分的两端部分， 受到较小的来自位于所述分流装置内部 的气体发生装置的气体的冲击， 保障了分流结构的完好。 图 1: 为本发明的分流装置同汽车安全气嚢间的工作示意图；
图 2: 为图 1中本发明分流装置的示意图；
图 3: 为本发明的分流装置的制作示意图；
图 4: 为本发明的分流装置的立体示意图。
具体实施方式
图 1显示的是本发明的气体分流装置 2在汽车安全气嚢 1中的工作示意图，图 2为图 1中本 发明的气体分流装置的示意图。如图 1和 2所示，才艮据本发明的气体分流装置 2内置于汽车安全 气嚢 1内， 并具有固定在所述气嚢 1上的固定部分 21和置于所述气嚢 1内的气体引导部分 22, 其中： 所述气体分流装置 2为筒形体。 优选地， 为所述气嚢 1充气的气体发生装置（未示出）的 出气口位于所述气体分流装置 2内部， 以此自出气口所出的气体将经过所述气体分流装置 2, 并 由所述气体分流装置 2的气体引导部分 22引导分流进入气嚢中。 同时， 作为所述气体分流装置 2的筒形的一部分的所述固定部分 21固定于所述气嚢 1 ,优选在所述气体分流装置 2的轴向方向 上的两端部处被固定。 优选地， 固定部分 21通过至少一条缝纫线与气嚢 1缝合固定。 作为所述 筒形体的另一部分的所述气体引导部分 22与所述固定部分 21沿所述气体分流装置 2的轴向延伸 并径向相对。 这里的轴向方向是相对于作为筒形体的气体分流装置 2而言， 即筒形体的轴向。
气体分流装置 2位于气嚢 1中， 并具有固定在所述气嚢 1上的固定部分 21和置于所述气嚢 1内的气体引导部分 22; 本发明中的气体分流装置 2为筒形体， 为所述气嚢 1充气的气体发生装 置的出气口位于所述气体分流装置 2内部。 因此， 气体发生装置所产生的气体将沿着筒形体的内 部被分流引导。 在本发明中， 气体分流装置 2为筒形体形状且气体发生装置位于其中， 这便形成 了明确的气体分流路径。 当对气嚢充气时， 上述结构将有利于气体的分流。 这是因为， 气体分流 装置 2所受到的气体冲击是自筒形体的内部沿径向方向向外，来自多个轴向方向的内部冲击使得 气体分流装置 2作为整体相对气嚢 1受力较小，气体拉动气体分流装置 2相对气嚢 1脱离的力较 小， 即固定部分 21所受到的气体压力将抵消其受到的由气体引导部分 22所产生的拉力。这样固 定部分同气嚢 1间不易受到破坏， 不会出现现有技术中只有气体引导部分受到气体的冲击，并进 而拉动固定部分造成固定部分脱离的现象。因此保持了气体分流装置 2和气嚢 1之间的位置关系， 这是实现分流功能的首要条件。
本发明的气体分流装置 2可以由柔性的织物材料缝合而成。作为本发明的优选实施例，所述 气体分流装置 2釆用柔性的硅胶涂层织物制成。
参照图 3和图 4 , 图 3为本发明的气体分流装置的制作示意图。 本发明的所述分流装置 2是 一重叠层部分，所述织物的所述两边缘部分在周向方向上交错由此在径向方向上重叠而形成这一 重叠层部分。
这种径向重叠的体壁在其本身加工或同气嚢固定时，固定的缝合线也将沿径向方向穿透而进 行缝合。 同时如上所述气体发生装置的主体， 包括气体出气口， 位于筒形体的气体分流装置 2 之中， 当气体发生装置自出气口出气时， 气体分流装置 2在引导气体时所受到的冲击力主要沿着 径向向外传播，径向重叠层部分处的径向缝合线受到很小的冲击力， 因此其缝合和固定不易被冲 击气体所破坏， 能够更好的保持分流结构。
作为进一步的选择， 所述固定部分 21全部由重叠层部分组成或者部分由重叠层部分组成。 优选的， 固定部分 21全部为重叠层部分组成， 这不仅使得气体分流装置 2本身的加工缝合和与 气嚢 1之间的固定可以通过一个工序完成，同时也使得气体分流装置 2同气嚢 1之间的固定接触 面以及气体分流装置 2同气体发生装置的接触面更加平整， 固定更加顺畅， 气体阻力小。
在上述的柔性织物的气体分流装置 2的实施例中， 固定在所述气嚢 1上的固定部分 21和置 于所述气嚢 1内的气体引导部分 22也都是织物材料。 这样气体分流装置 2和气嚢 1之间的固定 方式也通常釆用缝纫线来缝纫固定，而来自气体发生装置中的气体也沿着引导部分 22进行释放， 实现分流。 如图 1至 4所示， 在所述气体分流装置 2的轴向方向上的两端部， 所述固定部分 21 通过端部缝纫线 4与所述气嚢 1缝合固定。这是由于气嚢在分流过程中其两端由于处于受力加大 的区域， 而固定部分 21的中间部位将会受到气体所产生的来自径向压力， 因此中间部分相对稳 定。本发明中的气体分流装置 2只需要对其两端部进行简单的缝纫固定便可以达到有效的抵抗冲 击的效果， 同时位于两端的缝纫区域也便于缝纫设备的使用， 免于发生缝纫错误的工艺失误。
可以理解的是， 为了在固定部分 21与气嚢 1之间实现缝合固定， 所釆用的缝纫线可以不仅 仅限于上述端部缝纫线 4, 也可以优选在固定部分 21的其他位置釆用其他缝纫线以更好地进行 缝合固定。
如图 3 ( Α )所示， 在柔性织物的中间高度部分可以设置等高的两个孔， 在柔性织物环绕形 成筒形体之后， 这两个孔重叠而形成相互重叠的内孔和外孔， 在这种情况下， 优选地， 内孔周边 不设置缝纫线， 而外孔周边通过安装孔缝纫线 5缝合固定于气嚢壁。 另外， 优选地， 内孔的孔径 略大于外孔的孔径， 以便于气体发生装置插入并对准。 内孔和外孔的位置可以根据气体发生装置 的尺寸进行设计。
作为本发明的具体改进， 所述气嚢 1内的气体引导部分 22的内侧， 即面向所述气体发生装 置侧为连续面。 因为该内侧直接与分流气体相接触， 釆用连续面后其受到气体的冲击力均匀， 有 利于保持其筒形体的结构， 以实现分流功能。上述结构避免了现有技术中气体引导部分上由于具 有缝合线而被气体破坏实效的现象。在釆用所述气体分流装置 2是釆用柔性织物的实施例中， 由 22 ， 。
体引导部分 22的牢固程度， 减小了其被气体冲击破坏的可能性。
参照图 1至 4,作为本发明的进一步改进，在所述气体分流装置 2的轴向方向上的两端部处， 所述气体引导部分 22具有沿轴向方向向内的凹口 24。 更具体地， 所述凹口 24与所述端部缝纫 线 4径向相对， 以将所述端部缝纫线 4露出于所述气体引导部分 22的外侧。 由于两端部的向内 的凹口 24将会使得气体发生装置中的气体提前冲出所述气体引导部分 22的限制，同时在位于在 气体引导部分 22相对的固定部分 21上的两端部具有固定的端部缝纫线 4, 由于端部的气体提前 释放， 因此对固定处的冲击力也提前减小， 固定缝纫线 4相对更加牢固。
作为本发明的一个优选实施例，如图 1所示，本发明所应用的气嚢 1为具有上下两个腔体的 侧面气嚢， 同时气体发生装置的主体部分也置于气体分流装置 2 的内部。 所述气体分流装置 2 设置于所述下腔体 11之中。 替换性地， 气体分流装置 2也可以设置于上腔体 12和下腔体 11之 间。 优选地， 所述气体分流装置 2的轴向方向指向所述上腔体 12和下腔体 11。 此种布置将使得 发生装置所产生的气体首先填充下腔体 11再填充上腔体 12, 即自气体分流装置 2分流的气体首 先进入下腔 11 , 同时自其上端分流的气体部分通过上下两腔的分膈 13进入上腔 12, 这种分流方 式能够保证气嚢对人体的髋部和胸部的保护，特别是优先对髋部提供充分的保护。 由于本发明中 的气体分流装置 2牢固可靠，在充气时能够抵抗较大压力和温度的气流而保持其形状， 因而能够 良好的满足多个腔体的不同充气、 分流要求。
可以理解的是， 根据本发明， 气嚢 1也可以形成为单一腔体， 气体分流装置 2设置在该单一 腔体之中。
作为本发明的更进一步改进， 如图 1至 4所示， 所述气体发生装置沿所述气体分流装置 2 的轴向被置于所述气体分流装置 2之内，在放置所述气体发生装置的所述气体分流装置 2的进入 端处， 所述固定部分 21的面向所述气体发生装置的内层具有沿轴向向外的凸出条 23, 所述凸出 条 23缝纫固定在所述气嚢 1上以引导所述气体发生装置进 3入所述气体分流装置 2内。 需要注 意的是， 尽管本发明并非一定要设置凸出条 23 , 然而在安装气体发生装置的时候， 由于存在缝 纫在气嚢 1上凸出条 23的引导， 气体发生装置将沿着凸出条 23引入所述气体分流装置 2之内， 而不会使得气体发生装置置于所述气体分流装置 2之外， 形成实质的失效模式。 另外， 在凸出条 23 上的缝纫线将起到固定凸出条和气嚢壁的作用， 从而使气体发生装置不容易误插入固定部分 的重叠层部分之间。 同时作为改进， 凸出条 23位于固定部分 21的两端， 即处于固定部分 21和 气体引导部分 22之间的筒形体的上端处。凸出条 23的限位作用将保证气体发生装置被安装于气 体分流装置 2之内， 以确保气体分流装置 2能够起到分流气体的作用。 另外， 设置凸出条 23的 好处还在于， 如果不设置凸出条 23, 这样就不得不釆用较高级的缝纫工具对固定部分 21进行缝 合固定， 导致成本增大。
作为本发明的优选实施例，本发明提供一种汽车安全气嚢的气体分流装置，其内置于所述气 嚢内，并具有固定在所述气嚢上的固定部分和置于所述气嚢内的气体引导部分，所述气体分流装 置为筒形体， 为所述气嚢充气的气体发生装置的出气口位于所述分流装置内部，在所述气体分流 装置的轴向方向上的两端部处，所述气体引导部分具有沿轴向方向向内的凹口。在该实施例中筒 形体的气体分流装置将会受到来自气体发生装置各个方向的气体冲击力，固定部分受到压力将抵 消其受到的由气体引导部分所产生的拉力， 同时实施例中由于具有沿轴向方向向内的凹口特征， 也将分散出气端由气体引导部分所产生的拉力， 因此固定部分将有利于保持同气嚢之间的固定， 同时整个气体分流装置也将保持其整体形状， 实现对气体的分流引导。
通过上述实施例的介绍， 本领域的技术人员将能够根据上述描述釆用相应的技术手段， 并获 得本发明的所具有的技术特征， 以达到本发明目的、 解决本领域的技术问题； 同时， 上述实施例 描述只是便于对本发明内容的理解介绍，本发明的保护范围将通过权利要求中的内容得到体现和 保护； 而任何基于上述实施例的启发而获得的没有实质创造性的技术方案，也必将落入本发明权 利要求所声明和保护的范围。

Claims

权利要求书
1. 一种内置于汽车安全气嚢中的气体分流装置， 其中， 一气体发生装置经所述气体分流装 置向所述气嚢充气，所述气体分流装置具有固定在所述气嚢上的固定部分和置于所述气嚢内的气 体引导部分， 其特征在于： 所述气体分流装置为筒形体， 作为所述分流装置的筒形体的一部分的 所述固定部分与所述气嚢通过至少一条缝纫线缝合固定，而作为所述筒形体的另一部分的气体引 导部分为不设置缝纫线的连续面，来自所述气体发生装置的气体沿着气体引导部分进入所述气嚢 以对所述气嚢充气。
2. 如权利要求 1所述的汽车安全气嚢的气体分流装置， 其特征在于： 所述分流装置是釆用 柔性织物，并由其相对的两边缘部分相对中心环绕以形成所述筒形体，所述筒形体的体壁至少包 含由所述织物在径向方向上重叠而形成的重叠层部分。
3. 如权利要求 2所述的汽车安全气嚢的气体分流装置， 其特征在于， 所述固定部分全部由 重叠层部分组成或者部分由重叠层部分组成。
4. 如权利要求 2所述的汽车安全气嚢的气体分流装置， 其特征在于， 所述气体引导部分由 至少一层的所述柔性织物构成。
5. 如权利要求 1所述的汽车安全气嚢的气体分流装置， 其特征在于， 所述气嚢为具有上、 下两个腔体的侧面气嚢， 所述气体分流装置设置于所述下腔体之中。
6. 如权利要求 1至 5中任一所述的汽车安全气嚢的气体分流装置， 其特征在于， 在所述分 流装置的轴向方向上的两端部处， 所述气体？ I导部分具有沿轴向方向内陷的凹口。
7. 如权利要求 6所述的汽车安全气嚢的气体分流装置， 其特征在于， 所述至少一条缝纫线 包括位于所述分流装置的轴向方向上的两端部的端部缝纫线，所述端部缝纫线与所述气体引导部 分的凹口径向相对。
8. 如权利要求 7所述的汽车安全气嚢的气体分流装置， 其特征在于， 所述固定部分还包括 用于装配气体发生装置的安装孔，所述至少一条缝纫线还包括环绕所述安装孔将所述固定部分与 所述气嚢缝纫固定的安装孔缝纫线。
9. 如权利要求 8所述的汽车安全气嚢的气体分流装置， 其特征在于， 所述气体发生装置沿 所述气体分流装置的轴向被置于所述气体分流装置之内，在放置所述气体发生装置的所述分流装 置的进入端处，所述固定部分的面向所述气体发生装置的内层具有沿轴向向外的凸出条，所述凸 出条缝纫固定在所述气嚢上以引导所述气体发生装置进入所述分流装置内。
10. 如权利要求 8所述的汽车安全气嚢的气体分流装置， 其特征在于， 所述气体发生装置沿 所述气体分流装置的轴向被置于所述气体分流装置之内，在放置所述气体发生装置的所述分流装 置的进入端处，所述气体引导部分短于所述固定部分，从而使所述固定部分露出于所述气体引导 部分而形成一露出部分， 所述端部缝纫线沿该露出部分的边缘延伸。
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