KNEE AIRBAG COMPONENTS
Patent Information
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- AUTOLIV ASP INC
- Filing Date
- 2018-05-30
- Publication Date
- 2026-07-09
Smart Images
Figure 00000000_0000_ABST
Abstract
Description
TECHNICAL AREA
[0001] The present disclosure relates generally to the field of protection systems for vehicle occupants. In particular, the present disclosure relates to airbag assemblies, such as inflatable knee airbag assemblies with one or more additional outer chambers. BACKGROUND
[0002] Vehicles are equipped with protective systems to safeguard an occupant during a collision. Some of these systems include knee airbags. However, some protective systems have one or more drawbacks or do not function optimally in one way or another. Certain embodiments disclosed herein can resolve one or more of these problems. List of characters
[0003] The disclosure contained herein describes illustrative embodiments which are neither limiting nor exhaustive. Reference is made to some of these illustrative embodiments, which are depicted in the figures, for which the following applies: Fig. Figure 1A is a side view of a seating position in a vehicle with an inflatable knee airbag assembly in its packaged state. Fig. Figure 1B is a side view of a vehicle seating position with the inflatable knee airbag assembly from Fig. 1A in an unfolded state. Fig. 1C is a side view of a vehicle seating position with the inflatable knee airbag assembly from Fig. 1A in an unfolded state, with the additional chamber at least partially inflated. Fig. 1D is an angled top view of the airbag cushion of the airbag assembly from Fig. 1A with partially deployed airbag cushion. Fig. 1E is an angled top view of the airbag cushion of the airbag assembly of Fig. 1A with at least partially deployed airbag cushion and at least partially inflated auxiliary chamber. Fig. Figure 2 is a top view of an airbag cushion of a knee airbag assembly before installation according to one embodiment. Fig. Figure 3 is a partial exploded view of an orthogonal view of an airbag cushion of a knee airbag assembly according to one embodiment. Fig. Figure 4A is a cutaway side view of an airbag assembly according to one embodiment, with the airbag cushion deployed and at least partially inflated. Fig. Figure 4B is a cutaway side view of an airbag assembly according to one embodiment, with the airbag cushion deployed and at least partially inflated, and another embodiment of an additional chamber is shown. Fig. Figure 4C is a cutaway side view of the airbag assembly according to one embodiment, with the airbag cushion deployed and at least partially inflated, and also shows a further embodiment of an additional chamber. Fig. Figure 4D is a cutaway side view of the airbag assembly according to one embodiment, with the airbag cushion deployed and at least partially inflated, and showing a further embodiment of an additional chamber. Fig. Figure 5A is a top view of an airbag cushion of a knee airbag assembly according to a further embodiment. Fig. 5B is an angled top view of the airbag cushion of Fig. 5A with at least partially deployed airbag cushion, wherein the auxiliary chamber and a central bladder are at least partially inflated. Fig. 5C is a partial exploded view of an orthogonal view of the outer chamber fabric web of the airbag assembly of Fig. 5A. Fig. 5D is an orthogonal view of the composite, pre-assembled outer chamber fabric sheet of the airbag cushion from Fig. 5A. Fig. 5E is a partial exploded view of an orthogonal view of the airbag cushion of Fig. 5A with the composite outer chamber fabric web. Fig. Figure 6A is a top view of an airbag cushion before installation according to a further embodiment, including a plurality of bubble fabric webs. Fig. 6B is an angled top view of the airbag cushion of Fig. 6A with at least partially deployed airbag cushion, wherein the auxiliary chamber and a multitude of cushion bubbles are at least partially inflated. Fig. Figure 7A is a top view of an airbag cushion of an airbag assembly before installation according to a further embodiment and including a plurality of pleated bubbles. Fig. 7B is an angled top view of the airbag cushion of Fig. 7A with the airbag cushion in the uninflated, pre-assembled state. Fig. 7C is an angled top view of the airbag cushion of Fig. 7A with the airbag cushion deployed and at least partially inflated, with the additional chamber and the pleated bladders at least partially inflated. Fig. Figure 8 is a top view of an airbag cushion of an airbag assembly before installation according to a further embodiment, including a vertically oriented outer chamber fabric sheet coupled with the fabric sheet facing the occupant. Fig. 9A is an angled top view of the airbag cushion of Fig. 8 with unfolded and at least partially inflated airbag cushion and with at least a partially inflated additional chamber. Fig. Figure 9B is an angled top view of a further embodiment of an airbag cushion of an airbag assembly according to another embodiment, with the airbag cushion unfolded and at least partially inflated and with the additional chamber at least partially inflated. DETAILED DESCRIPTION
[0004] Occupant protection systems such as airbag assemblies can be installed at various locations in a vehicle to reduce or minimize occupant injuries during a collision. This disclosure specifically refers to airbag assemblies designed to deploy towards the knee area of an occupant seated in a vehicle, although the principles discussed herein may also apply to other types of airbag assemblies designed to cushion other parts of an occupant's body.
[0005] In general, airbag assemblies include an airbag cushion. Typically, the airbag cushion, in its packed state, is contained within a housing (e.g., rolled, folded, or otherwise compressed) and may be stored behind a cover. In the event of a collision, a gas generator may be activated, rapidly inflating the airbag cushion with inflation gas. The inflation gas can cause the airbag cushion to rapidly transition from a compactly packed (i.e., undeployed) state to an expanded or deployed state. In some embodiments, the expanding airbag cushion opens an airbag cover (e.g., by tearing a rip seam or opening a door-like structure) to exit the housing. The gas generator may be activated by any suitable device or system, and the activation may be in response to, or influenced by, one or more vehicle sensors.
[0006] Airbag assemblies can also include a knee support or knee airbag to protect an occupant's knees or lower legs in a collision. Such knee supports can absorb at least some of the occupant's impact energy during a collision. In some embodiments, the knee support can include an airbag cushion that contacts and cushions an occupant's knees during a collision.
[0007] Some of the embodiments of airbag assemblies disclosed herein may be useful for protecting occupants sitting in the front seat of a vehicle. Other embodiments of airbag assemblies disclosed herein may be particularly useful for protecting occupants sitting behind the front seats of a vehicle.
[0008] For example, in some embodiments, the airbag assemblies include an airbag cushion that deploys from a relatively low position directly in front of the occupant. For example, the airbag cushion may deploy from an instrument panel or seat backrest in a position that is equal to or lower than the knee position of a rear-seat occupant.
[0009] The components of the embodiments described herein in general terms and illustrated in the figures can be arranged and designed in a multitude of different configurations. The following more detailed description of various embodiments, as shown in the figures, is therefore not intended to limit the scope of this disclosure, but is merely characteristic of different embodiments. Different aspects of the embodiments are illustrated in the drawings. The drawings are not necessarily to scale unless expressly stated otherwise.
[0010] An airbag assembly may include internal vents to direct inflation gas to different areas within the assembly, such as from a main chamber to an auxiliary chamber. An airbag may also have external vents to release inflation gases from the airbag into the atmosphere. These vents, whether internal or external, have an "outflow rate" that may depend on any number of factors that restrict, limit, or otherwise affect the velocity at which inflation gases are directed through the vent(s), or the timing of when the inflation gases are directed through the vent(s), or both the timing and the velocity.
[0011] The "outflow rate" of an outlet can refer to the extent to which the outlet allows the flow of inflation gas. Outflow rate can control or otherwise influence the timing of inflation gas flow through an outlet (internally, from area to area, or outward to the atmosphere). For example, if an outlet is designed to allow a significant volume of inflation gas to pass through or exit largely unimpeded, such an outlet may have a relatively high outflow rate. Conversely, an outlet that more strongly restricts the flow of inflation gas may have a relatively low outflow rate.
[0012] The terms "connect" and "coupled" are used in their common sense and are broad enough to denote any suitable coupling or other form of interaction between two or more elements, including mechanical and fluid interaction. Two components may be coupled even though they are not in direct contact with each other. The expression "attached to" refers to an interaction between two or more elements that are in direct contact with each other or are separated only by any suitable means of attachment (e.g., fasteners or adhesive). The expression "fluid connection" is used in its common sense and is broad enough to denote arrangements in which a fluid (e.g.,a gas or a liquid) can flow from one element to another when the elements are in fluid compound with each other.
[0013] As used herein, the terms "forward" and "backward" are used with reference to the front and rear of the vehicle in question. For example, an airbag cushion deploys backward when it inflates toward the rear of the vehicle.
[0014] The directional terms "proximal" and "distal" are used herein to denote opposite points on an airbag cushion. The proximal end of an airbag cushion is the end of the airbag cushion closest to the gas generator when the airbag cushion is fully inflated. The distal end of an airbag cushion is the end of the airbag cushion opposite the proximal end. In other words, the terms "proximal" and "distal" are used with reference to an attachment point, for example, an attachment point of the airbag cushion to a housing of an airbag assembly and an attachment point of an airbag assembly to a seat back from which an airbag deploys. Specifically, "proximal" is located facing such an attachment point, and "distal" is located facing away from such an attachment point.
[0015] The term "rear seat," as used herein, refers to a seat located behind the front seat(s) of a vehicle, regardless of whether it is the rearmost seat in the vehicle. The term "rear seat" also refers to any seat located behind other rear seats.
[0016] A "vehicle seating position" can be defined by a seat (e.g., passenger seat, driver's seat, rear seat) in the vehicle. A vehicle seating position can be the position in which an occupant is generally positioned when seated in a vehicle. A vehicle seating position can also be a position in which an occupant sits before or during a collision, or a position in which the vehicle or seat is configured to transport an occupant.
[0017] The term "vehicle" can refer to any vehicle, such as a car, truck, bus, airplane, etc.
[0018] The term "occupant" generally refers to a person in a vehicle. The term "occupant" can also refer to a dummy in a vehicle.
[0019] Fig. 1A is a partial side view of a vehicle seating position 50 in a vehicle (not shown) equipped with an inflatable knee airbag assembly 100 It is in packaged condition. It is an inmate. 70 depicted in an upright position in an occupant seat 54 sits. One lower leg 72 The occupant's position is shown. The inflatable knee airbag assembly. 100 is designed to detach from a component of the vehicle (or a vehicle structure) 52 ) to unfold, which is below a knee position of the vehicle seating position 50 is arranged. In the vehicle structure 52It could be part of an instrument cluster (or dashboard), or, in the case of a rear seat, another seat located in front of the seat in question. The inflatable knee airbag assembly 100 (Airbag assembly) closes at least one housing 102 , a gas generator 104 , a cover 106 and an inflatable airbag cushion 110 one. The case 102 is located in the vehicle, specifically on a lower part of the vehicle structure 52 , directly in front of the vehicle seating position 50 As in Fig. The inflatable airbag cushion is shown in 1A. 110 in a packaged state inside the case 102 and is designed to take in inflation gas in order to expand and escape from the casing 102 to unfold into an expanded state. The casing 102 is a component of the airbag assembly 100, which is attached to the vehicle and powers the gas generator 104 and the airbag cushion 110 contains (or at least partially contains) and supports the casing. 102 can be used with a cover 106 be covered. The gas generator ( 104 ) may include a container (not shown) for the chemical(s) or system that generates the inflation gas, as well as any pipes or lines for supplying the inflation gas to the airbag cushion 110 and all other components involved in the generation and supply of the inflation gas to the airbag cushion 110 are connected. The gas generator 104 can be fully enclosed in the housing 102 be built-in, only partially within the housing 102 are located or completely outside the housing 102 be arranged. The cover 106 is a feature of the airbag assembly 100 ; it can be a component of the housing 102or a component of the vehicle structure 52 be, where the case 102 is mounted. The cover 106 This could be a seam, a tear seam, a plate (which may be foldable at one edge), or another suitable means. The airbag cushion 110 is in a compressed and packaged state in the case 102 behind the cover 106 Included: The airbag cushion 110 is described in more detail below.
[0020] The knee airbag assembly 100 It can be triggered or activated by one or more sensors (not shown), or by any predefined event, such as a collision. The knee airbag assembly 100 The gas generator is triggered. 104 activated to generate and deliver inflation gas and thus inflate the airbag cushion 110 to unfold and remove it from the case 102 to bring it into an unfolded state. The cover106 can be triggered to open and deploy the airbag cushion 110 to enable, or the cover 106 can be caused by the expansion of the airbag cushion 110 it can be opened during its unfolding. In other words, in some embodiments the cover can be opened. 106 be equipped with a mechanism that, when triggered, causes the cover to open, while in other embodiments the cover 106 from the airbag cushion 110 It is blown up as it begins to expand because of the blowing gas from the gas generator. 104 into the airbag cushion 110 flows.
[0021] Fig. 1B is a side view of a vehicle seating position 50 with the inflatable knee airbag assembly 100 from Fig. 1A in its deployed state. The airbag cushion 110 was at least partially removed from the casing 102 through the use of the gas generator104 unfolded. The airbag cushion 110 closes a fabric panel facing the vehicle 122 and a strip of fabric facing the occupant 124 one, wherein the fabric facing the occupant 124 with the fabric facing the vehicle 122 at a main chamber connection (not shown, but see e.g. 123 in Fig. 1D) is coupled to form an inflatable main chamber 120 (main chamber). The fabric facing the occupant 124 When unfolded, it can be positioned so that it corresponds to the vehicle seating position. 50 is facing, or more precisely, the occupant's seat 54 The fabric panel facing the vehicle 122 can affect the vehicle seating position during their development 50 turned away and thus away from the vehicle structure 52 be turned towards.
[0022] In some embodiments, the fabric facing the occupant can 124and the fabric facing the vehicle 122 two separate and different fabric panels that are joined together by seams to form the main chamber 120 to form. In other embodiments, the fabric web facing the occupant can be 124 and the fabric facing the vehicle 122 be made from a single, uniform piece of fabric with suitable cutting, seams, etc. to form the main chamber 120 to form seams. Seams can be formed by sewing, gluing, adhesive tape bonding, high-frequency welding, or other suitable methods. The seams can be airtight or gas-permeable, depending on the application of the specific seam. The main chamber connection (not shown, but see, for example, 123 in Fig. 1D) could be a seam.
[0023] The main chamber 120 of the airbag cushion 110 provides a primary cushioning protection zone for the lower leg(s). 72the inmate 70 ready. In other words, the unfolded main chamber can 120 between the passenger seat 54 and the one directly in front of the passenger seat 54 existing vehicle structure 52 be arranged to protect the lower leg(s) 72 in a collision with the vehicle structure 52 to provide protective padding and thus prevent injury to the lower leg(s). 72 to prevent or reduce the airbag cushion. 110 also includes an additional chamber 130 a.
[0024] The additional chamber 130 can be achieved by coupling an outer chamber material web 132 to an outer surface of the fabric facing the occupant 124 be formed. In Fig. 1B is the outer chamber fabric web 132 with the fabric facing the occupant 124 at the main chamber connection (not shown, but see e.g. 123 in Fig. 1D) coupled. In other embodiments, the outer chamber fabric web can be 132 with the fabric facing the occupant 124 be coupled elsewhere.
[0025] One or more outlet openings 126 in the fabric facing the occupant 124 can a fluid connection between the main chamber 120 and the additional chamber 130 Provide the outlet(s). 126 can / can the timing of the supply of inflation gas into the auxiliary chamber 130 control in such a way that the outlet opening(s) 126 no inflation gas into the auxiliary chamber 130 leads / lead until the main chamber 120 the space between the lower leg(s) 72 the inmate 70 and the vehicle structure 52 filled or substantially filled. In other words, the outlet opening(s) can / can be 126 be designed in such a way that the outlet opening(s)126 does not open / open or otherwise allow the inflation gas access to the auxiliary chamber 130 granted / grant until a minimum pressure is reached in the main chamber 120 is achieved. The minimum inflation pressure of the main chamber 120 can be achieved by introducing inflation gas from the gas generator 104 The minimum inflation pressure of the main chamber can be achieved. 120 can also be achieved by the lower leg(s) 72 on the airbag cushion 110 acts / acts (e.g. before the minimum pressure is reached in another way) and pressure on the airbag cushion 110 exerts / exerts, thereby increasing the internal pressure of the airbag cushion 110 is increased. In other words, when the lower leg(s) 72 on the airbag cushion 110 impacts / impact before the minimum target pressure in the main chamber 120 If reached, the impact of the lower leg(s) can 72 the main chamber120 deform and cause the pressure in the main chamber to increase 120 rises in such a way that the outflow opening(s) 126 opens or is otherwise enabled to allow inflation gas to enter the auxiliary chamber 130 flows. In at least some embodiments, the outlet opening(s) can be 126 be set up to control the timing of the inflation of the auxiliary chamber 130 to control until the lower leg(s) 72 the inmate 70 begins, onto the airbag cushion 110 to influence in such a way that the supplementary chamber 130 to the front of the lower leg(s) ( 72 ) of the occupant 70 adapts.
[0026] Alternatively or additionally, the outflow openings can 126 exhibit an outflow rate that allows for controlling or otherwise influencing the timing for inflating the auxiliary chamber 130relative to the main chamber. An outflow rate from a predetermined outflow opening. 126 can be based on a predefined application for the airbag assembly 100 , a distance between a desired main chamber position and the vehicle seat position 50 , a desired pressurization of the main chamber 120 , a size of the main chamber 120 and / or configured to the throughput of inflation gas from a gas generator.
[0027] Fig. 1C is a partial side view of a vehicle seating position 50 with the inflatable knee airbag assembly 100 from Fig. 1A in an unfolded state, wherein the additional chamber 130 is at least partially inflated. As in Fig. As shown in 1C, the gas generator 104 continuous inflation gas for the main chamber 120 provided. The main chamber 120has reached a state of inflation in which the discharge opening(s) is caused or enabled to open. 126 Inflation gas into the auxiliary chamber 130 conducts / conducts. Alternatively, the inflation of the additional chamber can be used. 130 by the action of the lower leg(s) 72 on the airbag cushion 110 have begun, as described elsewhere herein. The Supplementary Chamber 130 has been at least partially inflated. The additional chamber 130 can occur in the lateral direction of the lower leg(s) 72 inflated to restrict lateral movement of the lower leg(s) 72 the inmate 70 to restrict. If the lower legs 72 are separated from each other while the additional chamber 130 is inflated, the additional chamber 130 also between the lower legs 72 the inmate 70 be inflated. This is because the additional chamber 130laterally and between the lower legs 72 the inmate 70 When inflated, it can restrict the lateral movement of the lower leg(s). 72 limiting. In other words, the delayed timing of the inflation of the auxiliary chamber can 130 cause the additional chamber 130 around the lower leg(s) 72 the inmate 70 inflates around and thus the lower leg(s) 72 Stabilized against lateral movement. Restriction of lateral movement of the lower leg(s). 72 can cause injuries to the lower leg(s) 72 reduce or prevent (e.g. twisted, sprained or broken ankles) by preventing the lower leg(s) from 72 against the vehicle structure 52 or other vehicle components collide (or that the lower legs 72 (colliding against each other). A limitation of the lateral movement of the lower legs 72This can be particularly advantageous in collisions with oblique impacts, because forces often act that cause an abrupt lateral movement of the lower legs. 72 can cause.
[0028] Fig. 1D is an angled top view of the airbag cushion. 110 the airbag assembly of Fig. 1A with partially deployed airbag cushion 110 , similar to the one in Fig. 1B depicts the unfolded state. The viewing angle of the Fig. 1D is in Fig. Shown in 1B and labeled 1D-1D. The lower legs 72 the inmate 70 are with the airbag cushion 110 not yet come into contact with the airbag cushion 110 is partially unfolded, so that the main chamber 120 is at least partially inflated and essentially fills the space between the lower legs 72 of the occupant and the vehicle structure 52 in front of the occupant 70 fills out the additional chamber130 is not yet inflated. The fabric panel facing the vehicle 122 is closer to the vehicle structure 52 , while the fabric facing the occupant 124 closer to the lower legs 72 is. In the embodiment of the Fig. 1D are the two fabric panels 122 , 124 coupled at the seams, which form a main chamber coupling 123 form the outer chamber fabric web 132 , which is the additional chamber 130 forms, is attached to the fabric facing the occupant 124 the main chamber 120 at the main chamber coupling 123 coupled. The outlet opening(s) 126 can be designed in such a way that it remains closed or otherwise prevents the inflow of inflation gas into the auxiliary chamber 130 restricts / restrict until a minimum pressure is reached in the main chamber 120 is achieved.
[0029] Fig. 1E is an angled top view of the airbag cushion. 110 the airbag assembly 100 from Fig. 1A with at least partially deployed airbag cushion 110 and at least partially inflated additional chamber 130 , similar to the one in Fig. 1C depicts the unfolded state. The viewing angle of the Fig. 1E is in Fig. 1C is shown and labeled 1E-1E. The main chamber 120 of the airbag cushion 110 is at least partially inflated. The additional chamber 130 is also at least partially inflated. In Fig. 1E will be the additional chamber 130 through the outer chamber fabric web 132 defined, the fabric facing the occupant 124 at the main chamber coupling 123 is coupled. The lower legs 72 and the additional chamber 130 are in contact with each other. In some cases, the inflation of the additional chamber can 130as a consequence of the timing of the outlet openings 126 begin by introducing inflation gas into the auxiliary chamber 130 Let it flow as soon as the target minimum inflation pressure of the main chamber is reached. 120 has been reached. The outlet opening(s) 126 can control the timing of the inflation of the additional chamber 130 control. In other cases, inflating the additional chamber can 130 by starting with the lower legs 72 with the airbag cushion 110 come into contact. The additional chamber 130 was at least partially on both sides and between the lower legs 72 inflated. In other words, the additional chamber was inflated. 130 at least partially inflated to fit the front of the lower legs 72 to adjust and thus the lateral movement of the lower legs 72 to restrict. The additional chamber 130 can the lower legs 72Stabilize against lateral movement to prevent injuries to the feet, ankles and knees (e.g., the lower leg(s)) 72 ), which is caused by a sudden lateral movement of the lower legs that is possible in collisions with oblique impacts 72 to prevent or otherwise limit injuries caused by these injuries. Without this stabilization, the lower legs can become damaged. 72 in an oblique impact, move violently in a lateral direction while the occupant's feet 70 Remain standing on the floor of the vehicle. The uneven movement of the feet compared to the upper part of the lower legs. 72 can cause injury. The disclosed embodiments, and in particular the additional chamber 130 can limit or prevent such injuries.
[0030] In the embodiment of Fig. 1E are three outlet openings 126shown. Other configurations are possible to facilitate the inflation of the additional chamber. 130 including the timing control discussed herein. In some configurations, a different number of outlet openings may be used. 126 come into use. The outlet openings used in any configuration 126 They can all be the same size and shape, or they can differ in size, shape, or both. The outflow openings 126 They can also differ in terms of their position in the fabric facing the occupant. 124 differ. Such further designs of the outlet openings 126 are anticipated by this revelation.
[0031] Fig. Figure 2 is a top view of the airbag cushion. 110 for example the knee airbag assembly of Fig. 1A before installation. The airbag cushion 110It is depicted as if it were spread out on a flat surface such as a table or the floor. The fabric facing the occupant. 124 is with the additional chamber coupled to it 130 depicted. The main chamber 120 can at least one retaining strap coupling 129 near a distal end 114 of the airbag cushion 110 and at least one tether coupling 129 near a proximal end 112 of the airbag cushion 110 include. (The retaining straps (internal retaining straps) are in Fig. 3 discussed.) Each retaining strap coupling 129 may be a suitable seam or include one. In the embodiment of Fig. 2. The fabric facing the occupant will be 124 and the fabric facing the vehicle 122formed from a single, uniform, suitable piece of fabric, with a fold or bend at the distal end 114 , wherein a first side edge 125a and a second side edge 125b the fabric facing the occupant 124 and the fabric facing the vehicle 122 at the main chamber couplings 123 are coupled to form the inflatable chamber of the main chamber 120 to form. Other arrangements for the formation of the main chamber. 120 of the airbag cushion 110 are possible and anticipated by this revelation (see, for example, another possible design in Fig. 3).
[0032] As in Fig. As shown in 2, the outer chamber fabric web extends 132 horizontally from the first side edge 125a the fabric facing the occupant 124 to the second side edge 125b the fabric facing the occupant 124The outer chamber fabric web 132 is thus on the fabric facing the occupant 124 arranged that they only use the single inflatable main chamber 120 at least partially overlaps or spans (or is laid over) it. It does not overlap or span multiple inflatable main chambers. The outer chamber fabric sheet 132 is on the outside of the fabric facing the occupant 124 arranged to at least partially cover an area of the main chamber 120 to superimpose, which is defined by two adjacent internal retaining bands (as in Fig. 2 shown, together at the retaining strap couplings 129 arranged). In other words, the outer chamber fabric web can 132 horizontally from the first side edge 125a the fabric facing the occupant 124 to the second side edge 125b the fabric facing the occupant 124extend and / or run vertically along the fabric facing the occupant 124 within a perimeter of only a single inflatable main chamber 120 extend. It does not extend over multiple inflatable main chambers.
[0033] The outer chamber fabric membrane 132 is with the fabric facing the occupant 124 at a proximal coupling 134 , a distal coupling 136 and at lateral couplings 138 coupled. In the embodiment of Fig. 2. The side couplings fall. 138 the outer chamber fabric 132 with the main chamber couplings 123 on both sides of the fabric facing the occupant 124 together. In other embodiments, the lateral couplings can 138 the outer chamber fabric 132 at other suitable positions on the fabric facing the occupant 124be arranged. In the couplings 134 , 136 , and 138 Each of these could be a properly executed seam.
[0034] Fig. Figure 3 is a partial exploded view of an orthogonal view of the airbag cushion. 110 from Fig. 1A. In the embodiment of Fig. 3 becomes a distal part of the airbag cushion 110 from a first piece of suitable material with a fold or bend at one proximal end 112 formed of the airbag cushion and the fabric facing the vehicle 122 and the fabric facing the occupant 124 are made from a second piece of suitable material with a fold or bend at the distal end 114 of the airbag cushion 110formed. The first and second pieces of material are joined together, for example by seams. In other embodiments, the fabric panel facing the vehicle and the fabric panel facing the occupant can be formed from a single, uniform piece of suitable material with a fold or bend at the proximal end (e.g., see Fig. 5E). In yet other embodiments, the fabric panel facing the vehicle and the fabric panel facing the occupant can be formed from a single, uniform piece of suitable material with a fold or bend at the distal end.
[0035] The outer chamber fabric membrane 132 is shown in its inflated state, in which it has the general shape of a "U". The outer chamber fabric web 132 is simplified and does not include the side couplings (see e.g. 138 in Fig. 2) In the embodiment of Fig. 3 is each lateral end of the outer chamber fabric web 132 with a finishing piece 137 coupled to the outer chamber fabric web, and the end piece 137 The outer chamber fabric web is attached to a lateral coupling (not shown, but see e.g. 138 in Fig. 2) coupled. In other embodiments, the lateral ends of the outer chamber fabric web can be 132 suitable folds, creases, etc. are formed to accommodate the lateral couplings.
[0036] Fig. 4A is a cutaway side view of the airbag assembly. 100 from Fig. 1A with deployed and at least partially inflated airbag cushion 110 In the embodiment of Fig. 4A encloses the main chamber 120 four internal retaining straps 140 Each internal retaining strap 140 is at the retaining strap couplings 129to an inner surface of both the fabric facing the vehicle 122 as well as the fabric facing the occupant 124 coupled. Each internal retaining strap 140 can help to the main chamber 120 to shape and define and can determine the extent (generally from front to back relative to the vehicle) of the main chamber 120 limit. For example, the internal retaining straps 140 the thickness of the main chamber 120 limit.
[0037] The main chamber 120 of the airbag cushion 110 can at least one internal ligament 140 enclose. While in Fig. 3 two internal retaining straps 140 The figures shown may show fewer or more internal retaining straps. 140 in the main chamber 120 be enclosed. Each internal retaining strap 140 can have one or more openings 142to include the fluid connection for the inflation gas within the main chamber 120 of the airbag cushion 110 to enable the internal retaining strap 140 can be at a right angle to the fabric facing the occupant 124 be aligned as illustrated. In other embodiments, the internal retaining band can be 140 at any suitable angle relative to the fabric facing the occupant 124 and the fabric facing the vehicle 122 be aligned. 140 is on the inner surface of both the fabric facing the occupant 124 as well as the fabric facing the vehicle 122 on retaining strap couplings (not shown, but see e.g. 129 in Fig. 2) coupled. For illustrative purposes, the main chamber 120 of the airbag cushion 110depicted with straight lines, so that the fabric facing the occupant 124 and the fabric facing the vehicle 122 are parallel and have uniform surfaces. See, for example: Fig. 1B, Fig. 1C, Fig. 4A, Fig. 4B and Fig. 4C. As is easy to understand, a pillow under pressure can cause bulges in the fabric. 124 , 122 between the internal retaining straps 140 exhibiting a curved, indented, or otherwise uneven surface.
[0038] The outer chamber fabric membrane 132 is on an outer surface of the fabric facing the occupant 124 on or near the first and second side edges (not shown, but see e.g. 125a and 125b in Fig. 2) the main chamber 120 coupled, specifically at the proximal coupling 134 and the distal coupling136 The outer chamber fabric web 132 defines at least partially the additional chamber 130 In the embodiment of Fig. 4A extends to the additional chamber 130 vertically along the outer surface of the fabric facing the occupant 124 and within a perimeter of the fabric facing the occupant 124 In other words: the supplementary chamber 130 in the embodiment of Fig. 4A can use two of the internal retaining straps 140 overlap. In an embodiment with more than four internal retaining straps 140 can the additional chamber 130 more than two internal retaining straps 140 overlap. In other words: in an embodiment with four or more internal retaining straps. 140 can the additional chamber 130 all internal retaining straps 140 except for the most distal and the most proximal internal ligament 140 overlap.
[0039] The fabric facing the occupant 124 closes at least one outlet opening 126 one, to connect the fluid for the inflation gas to the auxiliary chamber 130 to enable. In one embodiment, in which the additional chamber 130 multiple internal retaining straps 140 When overlapping, multiple outlet openings can be used. 126 in the fabric facing the occupant 124 to be available.
[0040] Fig. 4B is a cutaway side view of the airbag assembly. 100 from Fig. 1A according to a further embodiment, with unfolded and at least partially inflated airbag cushion 110 , wherein a further embodiment of an additional chamber 130 is shown. In the embodiment of Fig. 4B can perform distal coupling 136 the outer chamber fabric 132 with the retaining strap coupling 129c be arranged together in such a way that the additional chamber130 vertically within a perimeter of an internal section of the main chamber 120 extends. In Fig. 4B is the distal coupling 136 together with a retaining strap coupling 129c arranged, and the proximal coupling 134 is between a proximally adjacent retaining band coupling 129a and a next proximally adjacent retaining strap coupling 129b arranged. In another embodiment, the proximal coupling can be 134 together with the retaining strap coupling 129 be arranged, with the distal coupling 136 between the distally adjacent couplings 129 is arranged. In both embodiments of Fig. 4B can / can be the outlet opening(s) 126 in the enclosed area of the fabric facing the occupant 124 be arranged to best ensure the fluid connection for the inflation gas from the main chamber 120to the additional chamber 130 to enable.
[0041] Fig. 4C is a cutaway side view of the airbag assembly. 100 from Fig. 1A according to a further embodiment, with unfolded and at least partially inflated airbag cushion 110 , wherein a further embodiment of the additional chamber 130 is shown. In the embodiment of Fig. 4C extends to the additional chamber 130 vertically along the fabric strip facing the occupant 124 or overlaps it within a perimeter of the fabric facing the occupant 124 In the illustrated embodiment of Fig. The additional chamber is located in 4C. 130 also within one of the adjacent internal retaining bands 140 formed perimeter. The proximal coupling 134 can be used together with the retaining strap coupling 129b or located near them. The distal coupling136 can be used together with the retaining strap coupling 129c or located near them. The outlet opening(s) 126 can / may in the area of the fabric facing the occupant 124 , which was elected by the Additional Chamber 130 is superimposed, arranged.
[0042] Fig. 4D is a cutaway side view of the airbag assembly. 100 from Fig. 1A according to a further embodiment, with unfolded and at least partially inflated airbag cushion 110 , wherein a further embodiment of an additional chamber 130 is shown. In the embodiment of Fig. 4D eliminates the outer chamber fabric layer (see 132 in Fig. 4C) and the additional chamber 130 can be achieved by means of a configuration of the fabric facing the occupant 124 , which are secured with the aid of a bridging internal retaining band 144 , which is in the main chamber 120is arranged, to be formed. The bridging internal retaining band 144 can an internal fabric web (the bridging internal retaining band) 144 ) include those attached to an inner surface of the fabric facing the occupant 124 at a first position (a bridge segment coupling) 149a ) and at a second position (a bridge segment coupling) 149b ), which is vertically offset from the first position, must be coupled. The bridging internal retaining band 144 and especially the bridge segment 146 , can affect an area of the fabric facing the occupant 124 form, so that in general a U-shaped additional chamber 130 arises. In other words, the bridging internal ligament can 144 the bridge segment 146 include the bridge segment 146 can be attached to an inner surface of the fabric facing the occupant 124at the proximal bridge segment coupling 149a and the distal bridge segment coupling 149b be coupled. The bridge segment 146 is shorter in the vertical direction than the corresponding area of the fabric facing the occupant 124 , which is from the bridge segment couplings 149a and 149b is defined. The bridge segment 146 of the bridging internal retaining ligament 144 may have one or more outlet openings (not shown, but see e.g. 126 in Fig. 4C) to include a fluid connection for the inflation gas from the main chamber 120 into the additional chamber 130 to enable the additional chamber 130 is designed so that it extends backwards towards the vehicle seat position (not shown, but see e.g. 50 in Fig. 1C) extends further than the adjacent parts of the fabric facing the occupant 124 .
[0043] The outflow opening(s) of the bridge segment 146 can be set up to control the timing of the inflow of inflation gas into the auxiliary chamber 130 similar to the outlet opening(s) of other embodiments (see e.g. 126 in Fig. 1E) to control in order to cause the additional chamber 130 It inflates laterally at the occupant's lower leg, thus limiting the lateral movement of the lower leg relative to the vehicle. The outlet(s) can control the timing of the inflation of the auxiliary chamber. 130 steer.
[0044] The Fig. 5A-5E represent one embodiment of an airbag assembly 500 which are present in certain aspects of the airbag assembly 100 similar. Thus, identical or similar characteristics are designated with the same reference numbers, where the first digits are counted up to "5". For example, the in Fig. 5A shows an embodiment of an airbag cushion 510 one which in some respects resembles the airbag cushion described above 110 may be similar. A relevant disclosure of features identified as similar, already presented above, will therefore not necessarily be repeated below. Furthermore, certain features of the airbag assembly will be discussed. 100 and associated components that are in the Fig. Features shown in Figures 1A-4C may not be shown in the drawings, may not be designated by a reference numeral, or may not be specifically discussed in the following description. However, such features may be clearly or substantially the same as those shown in and / or described in relation to other embodiments. Accordingly, the relevant descriptions of such features can be applied equally to those shown in Figures 1A-4C. Fig. Apply to the airbag assembly and its associated components shown in 5A ff. Any suitable combination of the features and their variations relating to the airbag assembly and its associated components shown in the Fig. 1A-4C illustrated airbag assembly 100 and whose associated components have been described, can also be described using the airbag assembly. 500 and their associated components of Fig. 5A and vice versa. This disclosure pattern also applies to further embodiments, which are illustrated in the following figures and described below, whereby the first digits can be counted further.
[0045] Fig. 5A is a top view of an airbag cushion. 510 a knee airbag assembly 500 according to another embodiment. The airbag cushion 510 It is depicted as if it were spread out on a flat surface, such as a table or floor. The airbag cushion 510closes a fabric panel facing the occupant 524 and an outer chamber fabric membrane 532 one. The fabric facing the occupant 524 forms at least a partial inflatable main chamber, and the outer chamber fabric sheet 532 forms an inflatable outer chamber (or additional chamber) that protrudes to the rear or otherwise extends from a rear surface of the fabric facing the occupant 524 the inflatable main chamber extends backward toward the occupant. In addition, in Fig. 5A a proximal airbag cushion end 512 , a distal airbag cushion end 514 and a variety of tether couplings 529 shown. The outer chamber fabric web 532 closes a vesicle 552 one designed to have a rearward-facing projection in a rear surface of the auxiliary chamber (see 530 in Fig. 5B) to form when inflating the additional chamber in an unfolded state.
[0046] In the embodiment of Fig. 5A closes the outer chamber fabric web 532 a multitude of separate, interconnected sections, including a first lateral outer chamber fabric layer 532a , a second lateral outer chamber fabric layer 532b and an outer chamber central bubble membrane 552 The outer chamber central bubble fabric web 552 It may have the shape of a vertical cross-section of an elongated spheroid, or, in other words, the general two-dimensional shape of an almond or an "American football." As used in this revelation, "almond" refers to "vesica piscis." The principal axis of the outer chamber-central bladder tissue pathway 552 can be applied to the center of the airbag cushion 510aligned with and positioned on or near it. In other words: the main axis of the elongated spheroidal shape of the outer chamber central bladder membrane. 552 is on or near the lateral center of the airbag cushion 510 arranged. Put another way, the outer chamber-central bubble fabric web 552 approximately equidistant from the side edges of the airbag cushion 510 arranged. The outer chamber central bubble fabric web 552 can be attached to the first lateral outer chamber fabric layer 532a and the second lateral outer chamber fabric layer 532b with a multitude of outer chamber-bubble fabric couplings 556 be coupled. The outer chamber-blister fabric couplings 556 Each can be a seam formed by sewing, ultrasonic welding or any suitable method.
[0047] The first lateral outer chamber fabric layer 532aand the second lateral outer chamber fabric layer 532b can each be a rectangular section having a first side with a length corresponding to the length of a perimeter of a corresponding first side of the outer chamber central bubble fabric web 552 It is similar. The first side of the rectangular section is attached to the outer chamber central bubble fabric web. 552 along a first side of the almond shape of the outer chamber central bladder membrane 552 attached. The almond-shaped outer chamber central bubble fabric web 552 is arranged between and attached to two opposing lateral sections, namely to the first lateral outer chamber fabric layer 532a and the second lateral outer chamber fabric layer 532b from the multitude of sections of the outer chamber fabric 532 The two lateral sections, namely the first lateral outer chamber fabric layer 532aand the second lateral outer chamber fabric layer 532b Each includes a first side with a length similar to the length of a perimeter of a corresponding side of the almond-shaped outer chamber central bubble fabric web. 552 is. The first side of each of the side fabric panels. 532a and 532b is along the perimeter of the corresponding side of the almond-shaped outer chamber central bubble tissue web 552 attached.
[0048] Fig. 5B is an angled top view of the airbag cushion. 510 from Fig. 5A with at least partially deployed airbag cushion 510 , whereby the additional chamber 530 (including the central bladder) 550 ) is at least partially inflated. The viewing angle in Fig. 5B is the one in Fig. 1E identical or very similar. The fabric panel facing the vehicle 522 is shown for reference purposes. The outer chamber fabric web 532includes a large number of fabric panels 532a , 532b , 552 one, which are attached to each other in such a way that at least one section (e.g. the outer chamber central bubble fabric web) 552 ) the multitude of sections is designed to extend further back than an adjacent part of another fabric web 532a , 532b the multitude of sections. In other words: the additional chamber 530 is from the first lateral outer chamber fabric layer 532a , the second lateral outer chamber fabric layer 532b and the outer chamber central bladder membrane 552 formed. The outer chamber central bubble membrane. 552 is attached to each lateral outer chamber fabric layer 532a , 532b at the outer chamber-bubble fabric couplings 556 coupled. The central bubble 550 can extend further back than the first lateral outer chamber fabric layer 532aor the second lateral outer chamber fabric layer 532b Put simply: the accessory central bladder 550 can extend further back than the adjacent parts of the auxiliary chamber 530 The further posterior extension of the central bladder 550 can help reduce the lateral movement of the lower legs 72 to prevent or reduce the impact of an occupant in a collision, including a lateral movement that could result in the lower legs striking each other 72 or results in excessive rotation of the ankles, thereby reducing or avoiding injuries to the occupant, including lower leg injuries commonly associated with oblique impact collisions.
[0049] Fig. 5C is a partial exploded view of an orthogonal view of the outer chamber fabric web. 532 the airbag assembly 500 from Fig. 5A and Fig. 5B. The outer chamber fabric web 532 closes the first side panel of fabric. 532a , the second side panel of fabric 532b and the outer chamber bladder fabric sheet 552 one. The outer chamber bladder fabric sheet 552 It has the shape of an elongated spheroid or an almond. The almond-shaped outer chamber bladder membrane 552 is between two opposing lateral fabric panels 532a , 532b the multitude of sections arranged which form the outer chamber fabric web 532 form.
[0050] The outer chamber central bubble fabric web 552 is on each side panel of fabric 532a , 532b at the outer chamber-central bubble membrane coupling (not shown, but see e.g. 556 in Fig. 5A and Fig. 5D) coupled. The first lateral fabric panel 532a can be a rectangular section that has a first side or a middle edge 533aexhibits a length similar to the length of the perimeter of a corresponding side or a first side edge 553a the almond-shaped outer chamber central bubble membrane 552 is. The middle edge 533a is designed to be placed on the first side edge 553a the outer chamber central bubble membrane 552 to be coupled. Similarly, the second side panel of fabric reflects 532b generally the first side panel of fabric 532a In other words: the second side panel of fabric 532b It is also rectangular and has a middle edge. 533b with a length similar to the perimeter of a second lateral edge 553b the outer chamber central bubble membrane 552 is; and the middle edge 533b is designed to use the second side edge 553b the outer chamber central bubble membrane 552to be coupled. The first side fabric panel 532a It also covers a side edge. 533c one. The second side panel of fabric 532b It also covers a side edge. 533d a.
[0051] Fig. 5D is an orthogonal view of the assembled, pre-assembled outer chamber fabric web. 532 of the airbag cushion 500 the Fig. 5A to Fig. 5C. The outer chamber central bubble fabric web 552 is between the two side fabric panels 532a and 532b arranged. The outer chamber central bubble fabric web 552 is attached to the two side fabric panels 532a , 532b at the bladder fiber couplings 556 coupled. The almond shape of the outer chamber-central bladder membrane 552 enables or causes the formation of wrinkles or folds 560 near the middle edges 533a , 533b both side fabric panels 532a, 532b The folds or creases 560 cause or enable the outer chamber central bladder membrane 552 extends further back than other sections of the outer chamber fabric 532 , to the central bubble (not shown, but see e.g. 550 in Fig. 5B) to form.
[0052] Fig. 5E is a partial exploded view of an orthogonal view of the airbag cushion. 510 the Fig. 5A to Fig. 5D with the composite outer chamber fabric web 532 The fabric panel facing the vehicle 522 and the fabric facing the occupant 524 are shown for reference purposes, as is the proximal end of the airbag cushion. 512 and the distal end of the airbag cushion 514 In the embodiment of Fig. 5E will be the composite outer chamber fabric web 532 each with an outer chamber end piece 537at each lateral end of the outer chamber fabric web 532 coupled. In the embodiment of Fig. 5E will be the outer chamber end pieces 537 to each lateral end of the outer chamber fabric sheet 532 and to the lateral coupling (not shown, but see e.g. 138 in Fig. 2) coupled. Two internal retaining straps 540 are shown for reference purposes.
[0053] Fig. 6A is a top view of an airbag cushion. 610 according to a further embodiment and including a plurality of bubble fabric webs 652 , 656a , 656b The airbag cushion 610 It is depicted as if it were spread out on a flat surface, such as a table or floor. The proximal end 612 The airbag cushion is shown at the bottom of the drawing. Fig. 6A shown, and the distal end 614 The airbag cushion is shown at the top of the drawing. Fig. 6A shown. In the embodiment of the Fig. 6A closes the multitude of sections of the outer chamber fabric web 632 the almond-shaped sections or the bladder tissue strands 652 , 656a , 656b one central bubble fabric web 652 is in or near the center of the outer chamber fabric 632 arranged. A side-blown fabric web 656a , 656b is located near the respective lateral ends of the outer chamber fabric web 632 arranged.
[0054] A first distal-lateral outer chamber fabric layer 632a is laterally outside the first side layer of bubble fabric 656a arranged. A first mediolateral outer chamber fabric liner 632b is between the first side layer of bubble fabric 656a and the central vesicle 652 arranged. A second mediolateral outer chamber fabric liner. 632c is between the central bubble tissue pathway 652and the second side bubble fabric web 656b arranged. A second distal-lateral outer chamber fabric layer 632d is laterally outside the second side layer of bubble fabric 656b arranged. Each sheet of bubble fabric 652 , 656a , 656b is attached to the corresponding edges of the relevant outer chamber lining sheets 632a , 632b , 632c , 632d coupled, in a similar way to the Fig. 5A to Fig. Described in 5D.
[0055] Fig. 6B is an angled top view of the airbag cushion. 610 from Fig. 6A with at least partially deployed airbag cushion 610 , whereby the additional chamber 630 and a variety of pillow bubbles 650 , 654 are at least partially inflated. The viewing angle in Fig. 6B is the one in Fig. 1E same or similar. The fabric web facing the vehicle 622and the fabric facing the occupant 624 are shown for reference purposes. The additional chamber 630 closes a central bubble 650 and two side bladders 654 one. The bubbles 650 , 654 are through the central bubble tissue pathway 652 and the side bubble fabric panels 656a , 656b formed. The blisters 650 , 654 can be positioned and configured to control the lateral movement of the lower legs 72 the inmate 70 to prevent or limit injuries to the lower legs in a collision, especially in an oblique impact collision. 72 is reduced or prevented. In other words: the central bubble 650 can prevent the collision of the lower legs 72 prevent or limit, and the side blisters 654 collisions of the lower legs can occur 72with various vehicle components to prevent or limit injuries to the lower legs 72 the inmate 70 can be reduced or prevented.
[0056] Fig. 7A is a top view of an airbag cushion. 710 an airbag assembly prior to installation according to a further embodiment and including a plurality of pleats 752 , 756a , 756b , which form wrinkled bubbles when deployed. The airbag cushion 710 is depicted as if it were spread out on a flat surface, such as a table or floor, with the fabric facing the occupant 724 Pointing upwards. A proximal end. 712 of the airbag cushion 710 is at the bottom of the drawing of Fig. 7A shown, and a distal end 714 of the airbag cushion 710 is at the top of the drawing of Fig. 7A is shown. In the embodiment of Fig. 7A is a pleat. 752 of the material of an outer chamber fabric sheet 732 near a lateral center of the outer chamber fabric web 732 arranged. In Fig. 7A is also a side pleat. 756a , 756b shown, located near the respective lateral ends of the outer chamber fabric web 732 is arranged. In the embodiment of Fig. 7A can create any of the pleats 752 , 756a , 756b as a lateral extension of the outer chamber fabric 732 formed from the material. In other words: the textile web which forms the outer chamber fabric web. 732 The resulting shape can be wider laterally than the width of the unfolded, inflated airbag cushion. 710 , so that the folding and pleating of each of the pleats 752 , 756a , 756b is possible. Each of the pleats752 , 756a , 756b can be achieved by appropriately folding the outer chamber fabric web 732 forming textile web, so that the pleats 752 , 756a , 756b during the inflation of the additional chamber 730 extend to the rear (relative to the vehicle).
[0057] Fig. 7B is an angled top view of the airbag cushion. 710 from Fig. 7A with the airbag cushion 710 in its uninflated, pre-assembled state. The viewing angle of Fig. 7B is similar to that of Fig. 1B (in Fig. (1B as 1D-1D). A fabric web facing the vehicle. 722 and a strip of fabric facing the occupant 724 are shown for reference purposes. Fig. Figure 7B shows a possible pleat configuration for each of the pleats. 752 , 756a and 756b relative to the outer chamber fabric web 732Other fold configurations are possible. For example, in Fig. 7B the middle pleat 752 shown folded in one direction. The middle pleat. 752 However, it could also be folded in a different direction or in multiple directions. Similarly, each side pleat could 756a , 756b in a different direction than shown or folded in multiple directions. While Fig. 7B the pleats 752 , 756a and 756b each as a fold of the outer chamber fabric web 732 As illustrated, every pleat can 752 , 756a , 756b can also be formed from several folds.
[0058] Fig. 7C is a partial angled top view of the airbag cushion. 710 from Fig. 7A with deployed and at least partially inflated airbag cushion 710 , whereby the additional chamber 730 and the blisters750 , 754 are at least partially inflated. The fabric panel facing the vehicle 722 and the fabric facing the occupant 724 are shown for reference purposes. In the embodiment of the Fig. 7A, Fig. 7B and Fig. 7C will create each of the pleats 752 , 756a , 756b formed from material that is compatible with the outer chamber fabric membrane 732 related. While the additional chamber 730 When inflated, the pleats can 750 , 754 They are inflated simultaneously, so that the pleats... 750 , 754 expand backwards, similar to the blisters described above 650 , 654 from Fig. 6B. The pleats 750 , 754 can the lateral movement of the lower legs 72 or knees or a twisting of the occupant's ankles 70to prevent or limit collisions, especially in the case of an oblique impact collision.
[0059] While the Fig. 7A, Fig. 7B and Fig. 7C an embodiment with three pleated bubbles 750 , 754 In another embodiment, the lateral fold bubbles can be shown. 754 Omitted. Other arrangements of fold bubbles are also possible.
[0060] Fig. Figure 8 is a top view of an airbag cushion. 810 an airbag assembly prior to installation according to a further embodiment and including a vertically oriented outer chamber material sheet 862 coupled with the fabric panel facing the occupant 824 The airbag cushion 810 It is depicted as if it were spread out on a flat surface, such as a table or floor. A proximal end 812 of the airbag cushion 810 is at the bottom of the drawing of Fig. 8 shown, and a distal end 814 of the airbag cushion 810 is at the top of the drawing of Fig. 8 shown. The airbag cushion 810 may contain one or more internal retaining straps (which together with a variety of retaining strap couplings) 829 are arranged). The internal retaining strap or straps are attached to an inner surface of the fabric facing the occupant. 824 at the retaining strap coupling(s) 829 coupled.
[0061] The outer chamber fabric membrane 862 It can take the form of an elongated spheroid, or in other words, the general two-dimensional shape of an almond or an "American football". The outer chamber fabric web 862 is attached to an outer surface of the fabric facing the occupant 824 at an outer chamber fabric web coupling 858 coupled. The outer chamber fabric web 862is in or near a lateral center of the airbag cushion 810 arranged. The outer chamber fabric web 862 can be part of one or more tether couplings 829 overlay the outer chamber fabric web. 862 is configured to extend further rearward (relative to the vehicle) than adjacent areas of the fabric facing the occupant 824 (see also 830 in Fig. 9A and Fig. 9B).
[0062] Fig. 9A is an angled top view of the airbag cushion. 810 from Fig. 8 with the airbag deployed and at least partially inflated 810 and with an additional chamber that is at least partially inflated 830 The viewing angle of Fig. 9A is similar to the one from Fig. 1B (in Fig. 1B as indicated 1D-1D). One or more internal retaining bands 840 can be between the fabric layer facing the vehicle 822and the fabric facing the occupant 824 be arranged as described elsewhere herein. One or more internal retaining straps 840 can help ensure that the airbag cushion 810 the space between the vehicle structure and the lower leg(s) 72 the inmate 70 adapts. In the embodiment of Fig. 9A can have one or more internal retaining straps 840 on an inner surface of the fabric facing the occupant 824 at a large number of retaining strap couplings 829 along a lateral width of the internal retaining straps 840 be coupled.
[0063] The additional chamber 830 is through an outer chamber fabric membrane 862 formed. The outer chamber fabric web 862 is on the fabric facing the occupant 824 at an outer chamber fabric web coupling 858coupled. Within the area of the fabric facing the occupant. 824 , which is from the outer chamber fabric web 862 When overlapped, the fabric facing the occupant can 824 one or more outlet openings 826 to include a fluid connection for the inflation gas into the auxiliary chamber 830 to provide the outlet opening(s) of the fabric facing the occupant. 824 can / may affect the timing of the inflation of the additional chamber 830 control, as described elsewhere herein. The auxiliary chamber 830 extends vertically along the fabric strip facing the occupant 824 , to between the lower legs 72 the inmate 70 to be positioned and configured. The additional chamber 830 can the lateral movement of the lower leg(s) 72 , the twisting of the occupant's ankles 70to prevent or limit injuries to the lower leg(s) in a collision, especially an oblique impact collision ( 72 ) and the occupant's ankle 70 reduced or prevented.
[0064] Fig. 9B is an angled top view of the airbag cushion. 810 from Fig. 8 according to another embodiment, with the airbag cushion deployed and at least partially inflated 810 and with the at least partially inflated additional chamber 830 The viewing angle of Fig. 9B is similar to that of Fig. 1B (in Fig. 1B is indicated as 1D-1D). The additional chamber 830 is through the outer chamber fabric web 862 formed The outer chamber fabric web 862 is on the fabric facing the occupant 824 at the outer chamber fabric web coupling 858 coupled. In the embodiment of Fig. 9B can be the fabric facing the occupant 824 , instead of the attached (single) ventilation opening(s) for introducing the inflation gas into the auxiliary chamber 830 , have an opening extending under the entire (or substantially the entire) area of the fabric facing the occupant 824 lies, which is located on the outer chamber fabric web 862 is superimposed. In other words: the coupling of the outer chamber fabric web. 858 delimited area of the fabric facing the occupant 824 can there be an opening in the fabric facing the occupant 824 include (see the outer chamber fabric web coupling) 858 in Fig. 9A).
[0065] The internal retaining strap or internal retaining straps 840 are applied to an inner surface of the fabric facing the occupant 824 at the retaining strap coupling(s) 829 coupled. In the embodiment of Fig. 9B can have one or more tether couplings. 829 , which are partially separated from the outer chamber fabric web 862 is / are superimposed, possibly not continuously across the entire width of a single retaining band or multiple internal retaining bands 840 They can run, but can also be a discontinuity. 829a or include a gap that corresponds to the opening in the fabric facing the occupant 824 agrees with the outer chamber fabric web 862 superimposed and from the outer chamber fabric couplings 858 is limited. In the embodiment of Fig. 9B can be the additional chamber 830 more or less simultaneously with the main chamber 820 of the airbag cushion 810 be inflated.
[0066] All methods disclosed herein include one or more steps or measures for carrying out the described procedure. The method steps and / or measures can be interchanged. In other words, unless a specific sequence of steps or measures is required for the proper operation of the embodiment, the sequence or application of specific steps and / or the taking of measures can be changed. Furthermore, subroutines or only a part of a method described herein may constitute a separate method within the scope of this disclosure. In other words, some methods may include only a part of the steps described in a more detailed method.
[0067] Reference to “an embodiment” or “the embodiment” within this specification means that a particular feature, characteristic, or structure described in connection with that embodiment is included in at least one embodiment. Therefore, the aforementioned expressions or variations thereof, as specified within this specification, do not necessarily all refer to the same embodiment.
[0068] Similarly, a person skilled in the art should understand from the present disclosure that, in the preceding descriptions of embodiments, various features are sometimes grouped together in a single embodiment, figure, or description thereof in order to streamline the disclosure. However, this method of disclosure should not be interpreted as implying that each claim requires more features than those expressly stated in that claim. Rather, as can be seen in the following claims, the inventive aspects lie in a combination of fewer features than the totality of all features of each of the embodiments disclosed above. Therefore, the claims following this detailed description are hereby expressly incorporated into this detailed description, each claim standing alone as a separate embodiment.This disclosure includes all permutations of the independent claims with their dependent claims.
[0069] The repetition of the expression “first” with reference to a feature or element in the claims does not necessarily imply the presence of a second or additional feature or element of this kind.
[0070] It will be obvious to the person skilled in the art that changes can be made to the details of the embodiments described above without departing from the underlying principles of this disclosure. Embodiments of the disclosure in which an exclusive feature or prerogative is claimed are defined as follows.
Claims
[1] Airbag assembly comprising: a housing for installation in a vehicle; an inflatable knee airbag in a packaged state within the housing, wherein the airbag is designed to receive inflation gas, expand and to transition from the housing into an deployed state, the airbag encompassing: a fabric panel facing the vehicle; a fabric panel coupled to the fabric panel facing the vehicle and facing the occupant to form an inflatable chamber that provides a primary cushioning protection zone for the lower leg of an occupant of the vehicle; an outer chamber fabric panel coupled to a rear surface of the fabric panel facing the occupant and arranged outside the inflatable main chamber to form an inflatable outer chamber facing the occupant; and one or more outlet openings arranged in the fabric facing the occupant to provide a fluid connection between the inflatable main chamber and the inflatable outer chamber and to allow inflation gas to flow from the inflatable main chamber into the outer chamber, wherein the one or more outlet openings control the timing of the inflation of the outer chamber in order to inflate the inflatable main chamber to such an extent that it fills a space between the vehicle and the lower leg of the occupant, and wherein one or more outlet openings control the timing of the inflation of the outer chamber to cause the outer chamber to inflate at the sides of the occupant's lower leg and to restrict the lateral movement of the lower leg relative to the vehicle. [2] Airbag assembly according to claim 1, wherein one or more outlet openings control the timing of the inflation of the outer chamber to cause the inflation of the outer chamber to begin as soon as the occupant's lower leg begins to act on the inflatable knee airbag, so that the outer chamber adapts to the front of the occupant's lower leg. [3] Airbag assembly according to claim 1, wherein the outer chamber fabric sheet is positioned on the fabric sheet facing the occupant in such a way that it overlays only a single inflatable main chamber. [4] Airbag assembly according to claim 1, wherein the outer chamber fabric panel extends horizontally from the first side edge of the fabric panel facing the occupant to the second side edge of the fabric panel facing the occupant. [5] Airbag assembly according to claim 1, wherein the outer chamber fabric sheet comprises a plurality of sections attached to one another, wherein at least a first section of the plurality of sections is configured to extend further rearward than an adjacent part of another section of the plurality of sections. [6] Airbag assembly according to claim 5, wherein the first section of the plurality of sections of the outer chamber material web comprises an almond-shaped section. [7] Airbag assembly according to claim 6, wherein the almond-shaped section is arranged between and attached to two lateral sections of the plurality of sections of the outer chamber fabric sheet. [8] Airbag assembly according to claim 5, wherein the plurality of sections of the outer chamber fabric web includes a plurality of almond-shaped sections. [9] Airbag assembly according to claim 1, wherein the outer chamber fabric panel extends vertically along the fabric panel facing the occupant and is arranged between the lower legs of the occupant. [10] Airbag assembly according to claim 1, wherein the outer chamber fabric sheet comprises one or more bubbles configured to expand and form a backward-facing projection in a rear surface of the outer chamber fabric sheet once the outer chamber fabric sheet is inflated in the deployed state. [11] Inflatable knee airbag configured to deploy from a vehicle component in a position below the knee position of a vehicle seat position, the inflatable knee airbag comprising: a first fabric panel which, when unfolded, is positioned so that it faces the vehicle seating position; a second fabric panel which, when deployed, is positioned such that it faces away from the vehicle seating position and is positioned in one direction of the vehicle component, wherein the second fabric panel is coupled with the first fabric panel to form an inflatable main chamber of the inflatable knee airbag; an external fabric panel coupled to an outer surface of the first fabric panel to form an inflatable additional chamber; and one or more outlet openings arranged in the first fabric panel to allow inflation gas to flow from the inflatable main chamber into the inflatable auxiliary chamber, wherein one or more discharge openings is / are configured to control the timing of the introduction of the inflation gas and to inflate the inflatable main chamber so that it fills a space between the vehicle and the lower leg of an occupant before the occupant collides with the inflatable knee airbag, and to inflate the auxiliary chamber so that it wraps around part of the lower leg of the occupant. [12] Inflatable knee airbag according to claim 11, wherein one or more outlet opening(s) controls the timing of the inflation of the additional chamber to cause the inflation of the additional chamber to begin as soon as the lower leg begins to act on the inflatable knee airbag. [13] Inflatable knee airbag according to claim 11, wherein the additional chamber fabric layer is positioned on the first fabric layer such that it only overlays a single inflatable main chamber. [14] Inflatable knee airbag according to claim 11, wherein the inflatable main chamber is to form a padded protection zone for an occupant of the vehicle, wherein the padded protection zone provides primary cushioning protection for a lower leg of the occupant and the additional chamber restricts the lateral movement of the lower leg relative to the vehicle. [15] Inflatable knee airbag according to claim 11, wherein the external fabric panel is positioned on the fabric panel facing the occupant, such that it at least partially overlaps only a single inflatable main chamber. [16] Inflatable knee airbag according to claim 11, wherein the outer chamber fabric sheet comprises a plurality of separate, connected sections, wherein at least a first section of the plurality of sections is configured to extend further rearward, away from the first fabric sheet, than an adjacent part of another section of the plurality of sections. [17] Inflatable knee airbag according to claim 16, wherein the first section of the plurality of sections of the outer fabric sheet comprises a section shaped like a vesica piscis. [18] Inflatable knee airbag according to claim 17, wherein the section shaped like a vesica piscis is arranged between and attached to two opposing lateral sections of the plurality of sections of the outer chamber fabric sheet. [19] Inflatable knee airbag according to claim 18, wherein the lateral sections each enclose a first side whose length is similar to the length of a perimeter of a corresponding side of the almond-shaped section and the first side of each of the lateral sections is attached along the perimeter of the corresponding side of the almond-shaped section. [20] Inflatable knee airbag according to claim 11, wherein the external fabric panel comprises one or more bubbles configured to expand when inflated and to extend further rearward than parts of the external fabric panel adjacent to one or more bubbles. [21] Inflatable knee airbag configured to deploy from a vehicle component in a position below the knee position of a vehicle seat position, the inflatable knee airbag comprising: a first fabric panel which, when unfolded, is positioned so that it faces the vehicle seating position; a second fabric panel which, when deployed from the housing, is positioned such that it faces away from the vehicle seating position and is positioned in one direction of the vehicle component, the second fabric panel being coupled with the first fabric panel to form an inflatable main chamber of the inflatable knee airbag; and an internal fabric panel attached to an inner surface of the second fabric panel at a first position and at a second position vertically offset from the first position, wherein the internal fabric panel forms part of the second fabric panel and creates an inflatable auxiliary chamber, the inflatable auxiliary chamber being configured to be inflated and to extend further towards the vehicle seating position than adjacent parts of the first fabric panel. [22] Inflatable knee airbag according to claim 21, further comprising one or more outlet opening(s) arranged in the internal fabric web to direct inflation gas from the inflatable main chamber to the inflatable auxiliary chamber. [23] Inflatable knee airbag according to claim 22, wherein one or more outlet openings are configured to control the timing of the introduction of the inflation gas and to inflate the inflatable main chamber so that it fills a space between the vehicle and the lower leg of an occupant before the occupant collides with the inflatable knee airbag, and to inflate the auxiliary chamber so that it wraps around part of the lower leg of the occupant. [24] Inflatable knee airbag according to claim 21, wherein the inflatable main chamber is intended to form a padded protection zone for an occupant of the vehicle and the padded protection zone provides primary cushioning protection for a lower leg of the occupant and the additional chamber restricts the lateral movement of the lower leg relative to the vehicle.