Wearable Impact Protection Airbag

Abstract

A wearable impact protection airbag (1) is disclosed. The airbag (1) comprises a pair of overlapping woven fabric layers (7, 8) interconnected by a perimeter seam (9) to define an inflatable chamber (10) for receiving inflation gas between the fabric layers (7, 8). The perimeter seam (9) defines at least a portion of the periphery of the inflatable chamber (10). The airbag (1) comprises fastening devices (4, 5, 15, 26, 40, 41) configured to secure the airbag (1) around a body part (3) of a wearer (2), the fastening devices (4, 5, 15, 26, 40, 41) being directly connected to the fabric of the airbag (1). The airbag (1) has an initial uninflated state and is configured to transition to a deployed and inflated state via inflation, the uninflated state including at least one fold within the airbag (1), and the airbag (1) is configured to unfold during inflation to cover a greater area of ​​the wearer's body portion (3) in the inflated state than in the uninflated state.

Description

[Technical Field]

[0001] The present invention relates to a wearable impact protection airbag, and more particularly to a wearable impact protection airbag formed from fabric with a fastening device connected directly to the fabric of the airbag for securing the airbag about a body part of a wearer. [Background technology]

[0002] Inflatable airbag devices are well known in the automotive industry. For a long time, airbags have been provided inside vehicles to protect occupants in the event of an accident, such as a collision. Such airbags deploy by inflation when the vehicle is about to collide or is colliding, cushioning the impact of the vehicle occupant against elements of the vehicle, such as the steering wheel or dashboard. Over time, it has become common to provide additional airbags at various locations throughout the cabin of a vehicle to provide additional or improved protection in the event of various specific types of accidents, such as rollover accidents or oblique impact collisions. For example, it is now common for automobiles to be equipped with inflatable curtain airbags, side airbags, knee airbags, and airbags of different configurations for rear seat passengers. Some vehicles also include airbags configured to deploy over portions of the exterior of the vehicle to protect pedestrians or so-called vulnerable road users (VRUs), such as cyclists or motorcyclists, in the event of being struck by the vehicle in an accident.

[0003] It has also been proposed to provide wearable personal protective devices intended to provide specific protection to designated body parts by placing an inflatable protective device near the particular body part to be protected, so that when the inflatable protective device is worn in a predetermined position on the body, or when an accident is imminent or has occurred, the inflatable protective device can be inflated to provide a cushioning effect to the designated body part to be protected.

[0004] For example, it has been proposed to provide an airbag inside motorcycle garments, such as motorcycle jackets, to improve motorcyclist protection in the event of an accident. In an exemplary configuration, garments, such as protective motorcycle jackets, typically have an airbag (e.g., hidden inside the garment's lining) disposed in fluid communication with an inflator, such as a gas generator. The inflator is operatively associated with a crash or impact sensor (which may be provided within the garment itself or alternatively on the motorcycle) configured to provide an activation signal to the inflator upon detection of an impending or actual crash or impact, thereby actuating the inflator to inflate the airbag inside the garment. As will be appreciated, inflation of the airbag inside the garment provides a cushioning effect to the portion of the wearer's body around or over which the airbag is provided. For example, a motorcycle jacket equipped with an airbag protects the upper body of the motorcyclist wearing the jacket.

[0005] The main parameters of importance for airbag performance in terms of the cushioning effect provided are pressure and thickness, i.e., the peak internal gas pressure and maximum inflated thickness of the airbag achieved upon deployment. It is generally known that, within certain limits, greater inflated thickness and greater inflation pressure improve the performance of an airbag in terms of providing effective protection. However, in the specific case of wearable inflatable protective devices, it has been found that the space available within a wearable garment (such as a motorcycle jacket) is often very limited, making it very difficult to accommodate an airbag that reaches a significant thickness upon inflation. The limited space between the outermost layer of the garment and the wearer's body represents part of the problem in this context, as it limits the size to which the airbag can inflate between the wearer's body and the outermost layer of the garment. However, airbags configured to reach a relatively large thickness upon inflation contain more structural material (typically woven fabric) than airbags configured to reach a relatively small thickness, and therefore necessarily require more space even when uninflated (i.e., before deployment). A large amount of airbag fabric attached to a wearable garment can make the garment uncomfortable to wear, particularly for extended periods of time, as may be required in the case of a motorcycle jacket, for example.

[0006] Other alternative forms of wearable personal protection devices have been proposed that are less susceptible to certain of the problems discussed above. For example, it has been proposed to provide an airbag initially in a folded and / or rolled package inside an accessory such as a backpack, harness pack, or belt pack. While these devices can accommodate larger airbags having more structural material (typically woven fabric) than motorcycle jackets, they can be considered cumbersome and inconvenient to wear. Additionally, these types of devices can be complex and therefore expensive to manufacture.

[0007] The present invention has been devised in consideration of the above.

[0008] It should be noted that while the present invention is described herein with particular reference to wearable protective devices intended to be worn about the upper body of a wearer, the present invention is not limited to wearable devices so configured. On the contrary, it is envisioned that the present invention may be embodied in a wide variety of wearable forms, and may be configured to be worn, for example, about the hips, legs, knees, arms, elbows, feet, hands, or head of a wearer (it being understood that the foregoing list is merely exemplary and not exhaustive). Summary of the Invention

[0009] According to a first aspect of the present invention, a wearable impact protection airbag is provided, the airbag being a fabric airbag comprising a pair of overlapping woven fabric layers interconnected by a perimeter seam to define an inflatable chamber for receiving inflation gas between the fabric layers. The perimeter seam defines at least a portion of the perimeter of the inflatable chamber. The airbag further comprises a fastening device configured to secure the airbag around a body portion of a wearer, the fastening device being directly connected to the fabric of the airbag. The airbag has an initial uninflated state and is configured to transition to a deployed and inflated state via inflation. The uninflated state includes at least one fold in the airbag, and the airbag is configured to unfold during inflation to cover a larger area of ​​the wearer's body portion in the inflated state than in the uninflated state.

[0010] In accordance with another aspect of the present invention, there is provided a wearable impact protection airbag, the airbag being a fabric airbag comprising a pair of overlapping woven fabric layers interconnected by a perimeter seam to define an inflatable chamber for receiving inflation gas between the fabric layers, the perimeter seam defining at least a portion of the perimeter of the inflatable chamber, yarns of one of the fabric layers interwoven with yarns of the other of the fabric layers to define the perimeter seam, whereby the perimeter seam is woven into and integrated into the structure of the layers, the airbag further comprising a fastening device configured to secure the airbag about a body part of a wearer, the fastening device being connected directly to the airbag fabric.

[0011] By connecting the securing devices (which may include zippers, straps, etc.) directly to the fabric of the airbag, a fairly minimalist wearable airbag is provided that does not require clothing, a backpack, a harness pack, or a belt pack, which can greatly simplify the airbag manufacturing process.

[0012] Conveniently, the fastening device may be connected directly to the fabric of the airbag at the peripheral seam.

[0013] Optionally, the outer surface of the folded airbag is visible in the uninflated state, and in some embodiments, the outer surface may become hidden from a portion of the wearer's body when the airbag is inflated to the inflated state.

[0014] Optionally, the fastening device comprises a zipper having two interlocking halves, at least one half of the zipper being directly connected to the perimeter seam, hi some embodiments, each half of the zipper is directly connected to a respective region of the perimeter seam.

[0015] Alternatively, or additionally, the fastening device may include a strap connected to the perimeter seam.

[0016] Optionally, the fastening device may include a waist strap that fits around the waist of the wearer, the waist strap extending through an integral fabric channel defined between overlapping edge regions of fabric layers exterior to the inflatable chamber. In some proposals, the yarns of one fabric layer are interwoven with the yarns of the other fabric layer to interconnect the edge regions of the fabric layers along an interwoven edge seam that is integral to the structure of the fabric layers and spaced from the perimeter seam, the fabric channel being defined between the perimeter seam and the edge seam.

[0017] In some embodiments, the fastening device may include a buckle or clasp connected directly to the peripheral seam. In some such proposals, the buckle or clasp may comprise two interconnecting portions, each portion of the buckle or clasp connected to a respective region of the peripheral seam.

[0018] Optionally, the airbag may further comprise an integral fabric socket defined between respective overlapping edge regions of the fabric layers exterior to the inflatable chamber, the fabric socket releasably receiving and engaging an anchor forming part of the securing device.

[0019] If provided, the fabric socket may comprise a cavity around which the edge regions of the fabric layers are interconnected to define the socket, the cavity having an opening distal to the inflatable chamber across which the edge regions of the fabric layers are not connected.

[0020] In some embodiments, the yarns of one of the fabric layers interweave with the yarns of the other of the fabric layers to interconnect the edge regions of the fabric layers around the cavity, thereby defining a socket.

[0021] In some embodiments, the at least one fold is effective to overlap regions of the peripheral seam, and the airbag may comprise releasable interconnection means configured to interconnect the overlapped regions of the peripheral seam in the uninflated state and to release the interconnection during inflation to the inflated state.

[0022] Optionally, the interconnection means comprises at least one of a releasable magnetic fastener, a releasable hook and loop fastener, and at least one button or snap.

[0023] In some embodiments, the airbag may have a reflex reflector disposed on a surface of the airbag that is visible in the uninflated state but hidden from a portion of the wearer's body in the inflated state. Alternatively, or additionally, the airbag may have a second, visually distinct reflex reflector disposed on a surface of the airbag that is hidden (e.g., within a fold) in the uninflated state but becomes visible in the inflated state.

[0024] The airbag may have an inflator operable to direct a flow of inflation gas into the inflatable chamber. The inflator may be automatically operable. For example, the inflator may include or otherwise be operatively associated with an acceleration sensor. Alternatively, or additionally, the inflator may be configured for manual operation by the airbag wearer.

[0025] Optionally, the inflator includes a gas generator.

[0026] The inflator may be repeatably operable.

[0027] The inflator may include an electrically operable compressor.

[0028] The inflator may include a pull cord operable to activate the inflator. For example, such an arrangement may be manually activated by a wearer pulling the pull cord. Alternatively, it has been proposed that the pull cord may be configured to be secured to, for example, a portion of a motorcycle. In such an example, if a motorcycle rider (wearing a wearable airbag) is thrown from the motorcycle or otherwise inadvertently falls from the motorcycle, the wearer's movement of the airbag away from the motorcycle creates tension in the pull cord, which effectively pulls the cord and activates the inflator.

[0029] According to a further aspect of the present invention, there is provided an airbag for a safety device. The airbag comprises a pair of overlapping fabric layers interconnected by a perimeter seam to define an inflatable chamber between the fabric layers for receiving inflation gas. The perimeter seam defines at least a portion of the perimeter of the inflatable chamber. The airbag further comprises an integral fabric socket defined between respective overlapping edge regions of the fabric layers exterior to the inflatable chamber, the fabric socket configured to releasably receive and engage an anchor to secure the airbag in a desired position for use.

[0030] This configuration provides a very simple and convenient means for securely yet releasably connecting an attachment means such as a strap directly to an airbag. For example, a strap such as a shoulder strap, chest strap, or belt may be provided with an anchor configured to simply and easily releasably engage in a fabric socket to directly connect the strap to the airbag. The releasable nature of the connection may allow for easy removal and replacement of the strap if it becomes damaged or worn, for example, through use.

[0031] Advantageously, the fabric socket comprises a cavity around which said edge regions of the fabric layers are interconnected to define the socket, the cavity having an opening distal to the inflatable chamber across which said edge regions of the fabric layers are not connected.

[0032] Optionally, said edge regions of the fabric layers are interconnected by a stitch formed around said cavity.

[0033] Alternatively, each fabric layer may be woven and include a plurality of threads, the threads of one layer interwoven with the threads of the other layer to interconnect the edge regions of the fabric layers around the cavity, thereby defining a socket.

[0034] Optionally, the yarns of one of the fabric layers interweave with the yarns of the other of the fabric layers across substantially the entire extent of the edge region of the fabric layer, except across the cavity of the socket, to define an edge seam that is integral to the structure of the layers and in which the socket is defined.

[0035] The yarns of one of the fabric layers may interweave with the yarns of the other of the fabric layers to define the perimeter seam, whereby the perimeter seam is woven and integrated into the structure of the layers. In such a configuration, the edge seam within which the socket is defined may form part of the perimeter seam.

[0036] Conveniently, the opening is defined between the edges of the respective edge regions of the fabric layers.

[0037] Preferably, the cavity extends inwardly from the opening towards the expandable chamber.

[0038] In some embodiments, the cavity may have a shape such that its width, measured substantially parallel to the overlapping fabric layers, is greater adjacent the inflatable chamber than across the opening. Thus, in such a configuration, the opening, which forms the narrowest portion of the cavity, may be larger than the associated anchor, thereby enabling the anchor to be securely retained within the fabric socket.

[0039] An airbag may be provided in combination with an anchor that is releasably engaged within the fabric socket.

[0040] The anchors may be provided at the ends of attachment straps or tethers that extend out from the fabric sockets and away from the edge region of the fabric layer.

[0041] In some embodiments, it is envisioned that the anchor is completely received within the fabric socket so that it is hidden from view between the overlapped edge regions of the fabric layers. This may be particularly advantageous in the case of wearable airbags, where the appearance of the airbag in normal use may be important. Also, hiding the anchor within the fabric socket in this manner may mean that the anchor is less likely to be damaged or snagged during use.

[0042] The airbag may comprise a plurality of such fabric sockets, and optionally at least one, or alternatively all, of the fabric sockets may receive a respective anchor.

[0043] The present invention includes combinations of the described embodiments and preferred features except where such combinations are expressly not permitted or explicitly avoided.

[0044] Those skilled in the art will understand that, except where mutually exclusive, features described in connection with any one of the above aspects may also be applied to any other aspect. Furthermore, except where mutually exclusive, any feature described herein may be applied to any aspect and / or may be combined with any other feature described herein. [Brief explanation of the drawings]

[0045] In order that the invention may be more readily understood and further features thereof may be appreciated, embodiments thereof will now be described, by way of example, with reference to the accompanying drawings, in which: [Figure 1] FIG. 1 is a front view showing an uninflated impact protection airbag in the form of a vest worn by a user. [Figure 2] FIG. 2 is a perspective view from the rear and one side showing the uninflated airbag of FIG. [Figure 3] FIG. 3 corresponds to FIG. 1 but shows the airbag in an inflated state to provide impact protection to the occupant. [Figure 4] FIG. 4 corresponds to FIG. 2 but shows the airbag in the inflated state of FIG. 3 to provide impact protection to the occupant. [Figure 5] FIG. 5 is a plan view from above showing the components of the airbag of FIGS. 1 to 4 in a flat, unassembled state. [Figure 6] FIG. 6 is a view similar to FIG. 5, but showing the airbag in an assembled, unworn configuration. [Figure 7] FIG. 7 is a schematic diagram showing in more detail an area of ​​the airbag prior to connecting a pair of securing straps. [Figure 8] FIG. 8 is a schematic diagram similar to FIG. 7 but showing the process of connecting one of the securing straps to the fabric of the airbag. [Figure 9] FIG. 9 is a schematic diagram similar to FIGS. 7 and 8, but showing the securing straps connected to the fabric of the airbag. [Figure 10]FIG. 10 is a perspective view from behind and to one side showing the securing straps used to secure portions of the airbag around the sides of the occupant's torso. [Figure 11] FIG. 11 is a front view showing an alternative impact protection airbag being worn by a user, with the airbag in an initial, uninflated state. [Figure 12] FIG. 12 is a front side view showing the airbag of FIG. 11 in an inflated state. [Figure 13] 13 is a rear view of the airbag of FIG. 11 in the inflated state of FIG. 12. FIG. [Figure 14] FIG. 14 is a plan view from above showing the components of the airbag of FIGS. 11 to 13 in a flat, unassembled state. [Figure 15] FIG. 15 is a view similar to FIG. 14, but showing the airbag in an assembled, unworn configuration. [Figure 16] FIG. 16 is a top plan view of the fabric portion of an alternative wearable impact protection airbag, representing a variation of the configuration shown in FIGS. 11-15. [Figure 17] FIG. 17 is a front view showing the airbag of FIG. 16 worn by a user, with the airbag in an initial, uninflated state. [Figure 18] FIG. 18 is a rear view showing the airbag of FIGS. 16 and 17 in an inflated state. [Figure 19] FIG. 19 is a front side view showing a portion of the airbag of FIGS. 16 to 18 in an inflated state. [Figure 20] FIG. 20 is a front view showing another impact protection airbag being worn by a user, with the airbag in an initial, uninflated state. [Figure 21] FIG. 21 is a rear side view of the uninflated airbag of FIG. [Figure 22] FIG. 22 corresponds to FIG. 20 but shows the airbag in an inflated state to provide impact protection to the occupant. [Figure 23]FIG. 23 corresponds to FIG. 21 but shows the airbag in the inflated state of FIG. 22 to provide impact protection to the occupant. [Figure 24] FIG. 24 is a plan view from above showing the components of the airbag of FIGS. 20 to 23 in a flat, unassembled state. [Figure 25] FIG. 25 is a view similar to FIG. 24 but showing the airbag in a partially assembled, unworn configuration. DETAILED DESCRIPTION OF THE INVENTION

[0046] Aspects and embodiments of the present invention will now be described with reference to the accompanying drawings, in which: Further aspects and embodiments will be apparent to those skilled in the art.

[0047] 1 and 2 show an uninflated airbag 1 in the form of a wearable impact protection device being worn by a user 2. FIGS. 3 and 4 show the same airbag 1 in an inflated, and therefore deployed, state. The illustrated embodiment is provided in the form of a vest worn around a user's torso 3 to provide impact protection to the user's torso 3. It can thus be seen that the airbag 1 is configured to extend across the user's chest, shoulders, and back. The illustrated airbag 1 is provided with a fastening arrangement that includes both a conventional zipper 4 at the front and a pair of adjustable fastening straps 5 at each side (only one pair of straps 5 is shown at one side in FIG. 2). The zipper 4 opens the front of the vest so that the user can don the vest, and then the front of the vest can be closed around the front of the user's torso 3. The adjustable fastening straps 5 enable the front and rear regions of the airbag 1 to be drawn together around the sides of the user's torso 3 to ensure a snug fit when the airbag 1 is donned, and may themselves be adjusted in length via respective sliders 6 in known manner to accommodate users of different sizes. The fastening straps 5 may be formed from flexible webbing.

[0048] The airbag 1 is formed from a first superimposed fabric layer 7 and a second superimposed fabric layer 8, which are interconnected by a perimeter seam 9 to define an inflatable chamber 10 between the fabric layers for receiving inflation gas from an inflator 11. The perimeter seam 9 therefore defines the perimeter of the inflatable chamber 10. As will be appreciated, only one (front and outwardly facing) fabric layer 7 is clearly visible in Figures 1-4 because the other (rear and inwardly facing) layer 8 is hidden from the user's body (or clothing).

[0049] Although the inflator 11 is shown integrated into the forward region of the airbag 1, it will of course be understood that the inflator 11 may be provided in any convenient location. The inflator 11 is operable to direct flow.

[0050] The two fabric layers 7, 8 are further interconnected by one or more seams 12 extending inward from the peripheral seam 10 as a re-entrant extension thereof to define a narrow non-inflatable region of the airbag 1. The narrow non-inflatable region defined by the seams 12 allows the airbag 1 to bend or curve around the user's torso 3 when the airbag 1 is inflated, as shown in Figures 3 and 4, and in this state the airbag 1 has a significantly increased thickness and stiffness. Other non-inflatable regions may be defined by additional seams (not shown) disposed within and separated from the peripheral seam 9.

[0051] The airbag 1 shown in Figures 1-4 is formed by a so-called "one-piece weaving" technique, in which the yarns of one fabric layer 7 are interwoven with the yarns of the other fabric layer 8 to define a perimeter seam 9 and a re-entrant seam 12. In this manner, the seams 9, 12 are woven into and integrated into the structure of the fabric layers 7, 8.

[0052] 2 and 4, it should be noted that the securing straps 5 on each side of the airbag 1 are both connected to the airbag 1 outside the inflatable chamber 10 (i.e., outside the perimeter of the inflatable chamber 10 defined by the perimeter seam 9) between two pairs of overlapping edge regions 13, 14 of the respective fabric layers 7, 8. The configuration of one pair of these overlapping edge regions 13, 14 is shown in more detail in FIG. 7, which is discussed in more detail below.

[0053] Figure 5 shows the various components of the airbag 1 laid out flat prior to assembly of the airbag 1. As can be seen, the zipper 4 comprises two halves 4a, 4b which are shown separated from one another in Figure 5. As is conventional, each half 4a, 4b of the zipper 4 comprises a number of teeth configured to interlockingly engage with the teeth of the other half 4b, 4a.

[0054] It can also be seen that each securing strap 5 comprises two portions: a relatively short strap portion 5a and a relatively long strap portion 5b. Each strap portion 5a, 5b of each strap 5 is provided with a respective anchor 15 at one end, which may be formed from metal or a suitable plastic material. Each slider 6 is attached to the opposite end of each short strap portion 5a, opposite the anchor 15. As can be seen, when the airbag 1 is assembled, each long strap portion 5b passes through the slider 6 of each short strap portion 5a to adjustably interconnect the strap portions 5a, 5b, thereby forming the complete strap 5.

[0055] As shown in Figure 5, during assembly of the airbag 1, each half 4a, 4b of the zipper 4 is connected directly to the fabric of the airbag 1 at the perimeter seam 9 (as indicated by the arrows) by respective stitching lines indicated generally at 16. Thus, each half 4a, 4b of the zipper 4 is directly connected to a respective area of ​​the perimeter seam 9, as shown in Figure 6. Figure 6 also shows strap portions 5a, 5b, which are connected directly to the fabric of the airbag 1 via their respective anchors 15, as will now be described in more detail.

[0056] As shown in FIG. 7 , the edge regions 13, 14 of each of the fabric layers 8, 9 forming the airbag 1 are also interconnected over substantially their entire extent (indicated by the shaded areas) using the “one-piece weaving” technique described above. Thus, the yarns of one fabric layer 7 interweave with the yarns of the other fabric layer 8 across the shaded areas shown in FIG. 7 to define an interwoven edge seam 17 that is integrated into the structure of the fabric layers 7, 8 in the same manner as the peripheral seam 9. In fact, in the illustrated configuration, the resulting edge seam 17 forms an enlarged, outwardly projecting portion of the peripheral seam 9 itself. Importantly, however, note that the edge regions 13, 14 of the fabric layers 7, 8 are not connected in the two non-shaded areas shown in FIG. 7 . Each of these non-connected regions of the fabric edge regions 13, 14 defines a fabric socket 18 that releasably receives and engages a respective anchor 15 provided at the end of a respective strap portion 5 a, 5 b. Although Figure 7 only shows two short strap portions 5a and their respective anchors 15, it should be understood that the long strap portions 5b and their anchors 15 are connected to the airbag 1 in substantially the same way.

[0057] Each fabric socket 18 is thus formed between the overlapped and unconnected areas of the edge regions 13, 14 of the fabric layers 7, 8, and effectively takes the form of a flexible pocket defining a cavity 19 around which the edge regions 13, 14 of the fabric layers 7, 8 are interconnected.

[0058] Each cavity 19 has an opening 20 distal to the inflatable chamber 10, the opening being defined between the overlapping and aligned edges 21, 22 of the fabric edge regions 13, 14. Each cavity 19 extends inward from its opening 20 toward the inflatable chamber 10 and terminates in a closed end having a central re-entrant protrusion 23 (formed by the interconnection of the fabric edge regions 13, 14) that extends into the cavity 19 toward the opening 20. Note further that each cavity 19 has a stepped cross-sectional shape, including a relatively narrow neck region adjacent its opening 20 and a wider interior region proximate the inflatable chamber 10. As shown in FIG. 8, the width w of each cavity 19, measured substantially parallel to the plane of the fabric, is therefore greater near the inflatable chamber 10 than the width (w2) of its opening 20 (w2).

[0059] FIG. 8 shows that the anchor 15 (located at the end of the short strap portion 5a) is presented for engagement in one of the fabric sockets 18. As can be seen from the arrow in FIG. 8 , the anchor is first inserted diagonally through the opening 20 into the cavity 19 of the socket 18, with one end 24 of the anchor 15 leading and the other end 25 following, between the overlapped and unconnected regions of the fabric edge regions 13, 14 that define the fabric socket 18. The leading end 24 of the anchor 15 is inserted first through the narrow neck region of the cavity 19 into the wider interior region of the cavity 19, after which the trailing end 25 is inserted into the wider interior region in a similar manner. The anchor 15 can then be straightened relative to the cavity 19 to assume the engagement position shown in FIG. 9 , where it is noted that the anchor 15 is held in the fabric socket 18 by the narrow neck region. Other anchors 15 can be engaged with their respective fabric sockets 18 in the same manner.

[0060] As will be appreciated, the woven fabric of the first layer 7 and second layer 8 of the airbag 1 is flexible and may have a woven structure that allows the fabric to stretch slightly, thereby allowing each fabric socket 18 to stretch somewhat to facilitate insertion of an anchor 15. However, it should be understood that such stretching of the fabric pockets 18 is not believed to be necessary, and embodiments are envisioned in which the size and geometry of the cavity 19 within each socket 18 is configured to facilitate insertion of the respective anchor 15 and resist subsequent inadvertent removal of the anchor 15 without requiring fabric stretching.

[0061] 9, when each anchor 15 is engaged within its respective fabric socket 18, the anchor 15 is fully received within cavity 19 of fabric socket 18 such that it is hidden from view between the overlapped and unconnected fabric edge regions 13, 14 that define fabric socket 18. The respective strap portions 5a, 5b to which each anchor 15 is attached thus extend out of the respective fabric socket 18, away from the edge regions 13, 14 of fabric layers 8, 9, through openings 20.

[0062] It will therefore be appreciated that the short strap portion 5a and the long strap portion 5b (which in combination define the securing straps 5) are connected to the fabric of the airbag 1, and in particular to the peripheral seam 9 via respective anchors 15 (note that the edge seam 17, within which the fabric sockets 18 are defined, forms an enlarged, outwardly projecting portion of the peripheral seam 9). The securing straps 5 are each connected at opposite ends to the peripheral seam 9 of the airbag 1.

[0063] As can be seen from FIG. 10, the manner in which each anchor 15 is fully received within its respective fabric socket 18 so as to be hidden from view provides an aesthetically unobtrusive connection between the securing straps 5 and the airbag 1 and also reduces the likelihood of any anchor 15 becoming caught during use of the airbag 1.

[0064] Each anchor 15 can then be disengaged and removed from its respective fabric socket 18 by reversing the insertion process described above with reference to Figure 8. In this manner, each anchor 15 can be easily removed from its fabric socket 18, thereby facilitating convenient removal of the securing strap 5 from, for example, the airbag 1.

[0065] Although the present invention has been described above with particular reference to an embodiment in which the airbag 1 has a securing device comprising a zipper 4 and securing straps 5 releasably connected around the sides of a user 2 wearing the airbag 1, it should be understood that other embodiments are envisaged in which the securing device may take different forms, for example not comprising a zipper 4, the securing straps 5 may be releasably connected to other areas of the airbag 1 to secure the airbag 1 around other parts of the user's body, or may not comprise securing straps 5 at all.

[0066] Figures 11-15 show a proposed alternative wearable impact protection airbag 1, with the same reference numerals used to indicate parts that are the same or equivalent to those described above in connection with the embodiment of Figures 1-10. Figure 11 shows the airbag 1 in an initial, uninflated state, while Figures 12 and 13 both show the airbag 1 in alternative inflated states that the airbag 1 transitions to upon inflation.

[0067] The embodiment shown in FIGS. 11-15 may be understood to have a fairly "skeletal" or minimalist configuration compared to the vest-type configurations described above with respect to FIGS. 1-10. Nevertheless, this embodiment is also provided in a configuration configured to be worn around a user's torso 3 to provide impact protection to the user's torso 3. Accordingly, it can be seen that the airbag 1 is configured to extend across both sides of the user's chest, across the upper shoulders of the user, and across both sides of the user's back. The airbag 1 includes a securement device comprising an adjustable-length chest strap 5 (shown most clearly in FIGS. 11 and 12), an adjustable-length back strap 5 (shown most clearly in FIG. 13), and an adjustable-length waist strap 26 in the form of a belt that fits around the user's waist region. The chest strap 5 and the back strap 5 are configured to adjustably interconnect the regions of the airbag 1 across the user's chest and back, respectively. Each strap 5, 26 may be formed from flexible webbing.

[0068] The sternum strap 5 and back strap 5, like the straps described above in connection with the embodiment of Figures 1-10, are both in two-piece form. Furthermore, the sternum strap 5 and back strap 5 are both connected to the fabric of the airbag 1 at the perimeter seam 9 in the same manner as described above in connection with the embodiment of Figures 1-10, i.e., via the same configuration of fabric sockets 18 and anchors 15. It should therefore be understood that the airbag 1 of Figures 11-15 is also formed by a so-called "one-piece weaving" technique, in which the yarns of one fabric layer 7 interweave with the yarns of the other fabric layer 8 to define the perimeter seam 9 (and additional seam 12 visible in Figure 13). In this manner, the seams 9, 12 are woven into and integrated into the structure of the fabric layers 7, 8, and thus the fabric socket 18 may be formed in the same manner as described above in connection with the embodiment of Figures 1-10.

[0069] The back strap 5 shown in Figure 13 is of the same configuration as the strap of the embodiment shown in Figures 1-10 and therefore includes a slider 6 for adjustably interconnecting its two strap portions 5a, 5b. The chest strap 5 is of a similar configuration but includes a releasable slider buckle 27 with two releasably interconnectable portions 27a, 27b (shown most clearly in Figures 14 and 15) to allow the chest strap 5 to be more easily opened and closed, thereby facilitating donning and doffing of the airbag 1 by the user 2.

[0070] Overlapping edge regions 28, 29 of the constituent fabric layers 7, 8 extend beyond the boundaries of the inflatable chamber 10 defined by the front and rear peripheral seams 9 of the airbag 1 in the region of the lumbar straps 26. These edge regions 28, 29 are interconnected by the "one-piece weaving" technique described above to form an interwoven edge seam 30 spaced apart from the peripheral seam 9 that defines the inflatable chamber 10. The yarns of one fabric layer 7 thus interweave with the yarns of the other fabric layer 8 to define the edge seam 30, which is thereby integrated into the structure of the fabric layers 7, 8, just like the peripheral seams 9 and 17, in which the fabric sockets 18 for the strap anchors 15 are defined. An integrated fabric channel 31 is therefore defined between these overlapping edge regions 28, 29 of the fabric layers 7, 8, and between the edge seam 30 and the peripheral seam 9. The lap strap 26 is connected to the fabric of the airbag 1 by being passed through the resulting fabric channel 31 (as indicated by the arrow in FIG. 14) and extends slidingly therethrough.

[0071] The waist strap 26 includes a releasable slider buckle 32 having two releasably interconnectable portions 32a, 32b (shown most clearly in Figures 14 and 15) similar in configuration to the releasable slider buckle 27 provided on the chest strap 5, thereby allowing the waist strap 26 to be easily opened and closed while the user 2 is donning and doffing the airbag 1.

[0072] In the embodiment shown in FIGS. 11-15, the inflator 11 is attached to a lower rear region of the airbag, thereby positioning the inflator 11 above the waist strap 26 in the user's waist region. The inflator 11 is operable to direct a flow of inflation gas into the inflatable chamber 10 of the airbag 1, thereby inflating the airbag 1 from an initial, uninflated state shown in FIG. 11 to an inflated state shown in FIGS. 12 and 13. In the particular embodiment shown, the inflator 11 is configured for automatic activation, but may alternatively be activated manually. As such, the inflator 11 is provided in combination with a mechanical (or electromechanical) trigger device 33. The trigger device 33 includes a lanyard 34 that functions as a pull cord for the trigger. The lanyard 34 has a releasable clip 35 at its free end, which may take the form of a carabiner-type clip. For example, if the user 2 is a motorcycle driver, the user may attach the clip 35 to a portion of the motorcycle they ride and connect the free end of the lanyard 34 to the motorcycle. As will be appreciated, in the event of a crash in which the user is thrown from the motorcycle, the lanyard 34 will therefore be pulled tight, thereby acting to activate the triggering device 33, and thereby activate the inflator 11. However, as will be appreciated, the lanyard also provides a convenient means for the user 2 to manually activate the inflator to inflate the airbag 1 by simply pulling on the lanyard 34. If no connection to a motorcycle is required, the clip 35 may be attached to a fabric loop 36 integrated into the bottom of the airbag 1, as best shown in FIG.

[0073] As can be seen by comparing Figure 11 with Figures 12 and 13, the initial, uninflated configuration of the airbag 1 shown in Figure 11 is characterized by two folds 37 on either side of the airbag. Each fold 37 is made along a respective fold line 38 (shown in dashed lines in Figures 14 and 15). Thus, the airbag 1 is provided in an initially uninflated state in a folded package and is configured to unfold during inflation to assume the inflated configuration shown in Figures 12 and 13 in which the airbag covers a greater area of ​​the wearer's torso 3 than in the initial, uninflated configuration.

[0074] As shown most clearly in Figure 11, the folds 37 are effective to overlap the regions 9a, 9b of the peripheral seam 9. Although Figure 11 only shows the overlapped regions 9a, 9b of the peripheral seam 9 at the front of the airbag 1, it will be understood from Figure 15 that the regions 9a, 9b of the peripheral seam 9 are also overlapped in the same manner at the rear of the airbag 1.

[0075] To hold the airbag 1 in an uninflated configuration within its initial packaging, the overlapped regions 9a, 9b of the peripheral seam 9 may be provided with releasable interconnection means for interconnecting the overlapped seam regions 9a, 9b in the uninflated configuration, which releases the interconnection upon inflation of the airbag 1. In a preferred embodiment, the interconnection means may be configured for subsequent reconnection so that the airbag 1 can be refolded after inflation and thus repackaged and ready for subsequent use. For example, the interconnection means may take the form of small magnetic fasteners 39 attached to the initially overlapped regions 9a, 9b of the peripheral seam 9, as shown schematically in FIG. 15. However, other proposals may use releasable hook and loop fasteners (such as those sold under the brand name VELCRO®), buttons, or snaps.

[0076] Although the illustrated airbag 1 is configured with a single fold 37 on each side of the airbag (hence, two folds in total), embodiments are envisioned that may include more folds 37. For example, the airbag 1 may be configured in its initial packaging such that each side of the airbag 1 is folded by creating multiple folds, such as concertina folds or Z-folds.

[0077] As shown in Figure 11, the airbag 1 may include one or more reflex reflectors 40 on a surface of the airbag 1. As will be appreciated, the reflex reflectors 40 shown in Figure 11 are provided on a surface of the airbag 1 that is clearly visible in the initial, uninflated configuration of the airbag 1, but that is hidden from the wearer's body when the airbag 1 is inflated to the inflated configuration shown in Figure 12.

[0078] As shown in FIG. 12 , the airbag 1 may additionally or alternatively include a reflective pattern 41 (which may also be reflective) on a surface of the airbag 1 that is typically hidden from view in an initial, uninflated configuration (e.g., hidden within the folded packaging of the airbag 1) but becomes visible when the airbag 1 is inflated to an inflated configuration such as that shown in FIG. 12 . Thus, the reflective pattern 41 may provide a clear visual indicator that the airbag 1 has been deployed or is not properly packaged in its uninflated state for normal use. The reflective pattern 41 may be configured to be visually distinct from the reflex reflector 40. For example, the reflective pattern 41 may be a different color and / or shape than the reflex reflector 40.

[0079] Figure 16 is a view similar to Figure 14 discussed above, but shows a variation of the above embodiment, with the securing straps 5, lap strap 26, and inflator 11 omitted for clarity. The embodiment shown in Figure 16 differs from the embodiments shown in Figures 11 to 15 in terms of the shape of the fabric portions of the airbag 1, and therefore the shapes of the constituent fabric layers 7, 8.

[0080] As discussed with respect to Figures 14 and 15, the previous embodiments are formed from fabric layers 7, 8 having curved side edges, which are interconnected by a perimeter seam 9 that follows the curved side edges of the fabric layers 7, 8. In contrast, the configuration shown in Figure 16 is configured such that the fabric layers 7, 8 have straight side edges. The two layers 7, 8 are again interconnected in the same manner as described above to form a perimeter seam 9 in a configuration that defines an inflatable chamber of the same general shape as that of the embodiment shown in Figures 11-15, but the one-piece woven perimeter seam 9 in the configuration shown in Figure 16 has a varying width (in the plane of the fabric layers 7, 8) that extends from the perimeter of the inflatable chamber 10 to the straight edges of the fabric layers 7, 8. In the widest region of the peripheral seam 9, the woven fabric of the peripheral seam 9 may be cut to define slits 9s, each of which extends inward from the edge of the interwoven fabric layers 7, 8 and terminates close to the outer periphery of the inflatable chamber 10.

[0081] Figure 17 shows the airbag 1 shown in Figure 1 in its initial, packaged, uninflated state, which will be understood to be generally similar to the equivalent state of the previous embodiment shown in Figure 11. However, as will be apparent, the straight edges of the peripheral seam 9 at the edges of the fabric allow for overlapping of much longer regions 9a, 9b of the peripheral seam. This can allow for the airbag 1 to be held more securely in its packaged state by providing interconnection means (such as the magnetic fasteners, releasable hook and loop fasteners, buttons, or snaps mentioned above) along the longer overlapped regions 9a, 9b of the peripheral seam 9.

[0082] 18 and 19 show the airbag 1 of FIGS. 16 and 17 in an inflated configuration, and from these figures it can be seen that the slits 9s in the peripheral seam 9 along each edge of the airbag 1 are positioned in front of, above, and behind the wearer's shoulders when the airbag is inflated. It will thus be appreciated that the slits 9s allow the wearer's arms to move without being restricted by the inflated airbag 1. For example, when the airbag 1 is worn by a motorcycle rider, it will be appreciated that the slits allow the airbag to inflate without restricting the rider from holding their arms in a conventional riding position.

[0083] FIGS. 20-25 illustrate a proposed alternative wearable impact protection airbag 1, with the same reference numerals used to indicate parts that are the same or equivalent to those described above in connection with the previous embodiment. FIGS. 20 and 21 illustrate the airbag 1 in an initial, uninflated state, while FIGS. 22 and 23 both illustrate the airbag 1 in an alternative inflated state. This embodiment is again shown in the form of a vest worn around a user's torso 3 to provide impact protection thereto, but has a somewhat more minimal configuration than the vest shown in FIGS. 1-10. Thus, the airbag 1 is configured to extend across the wearer's front torso region, across the user's upper shoulders, and across the user's back region. As with the previous embodiment, the airbag 1 is again formed by a so-called "one-piece weaving" technique, in which the yarns of one fabric layer 7 are interwoven with the yarns of the other fabric layer 8 to create a perimeter seam 9 that defines the perimeter of an inflatable chamber 10 formed between the two fabric layers 7, 8. In this way, the peripheral seam 9 is woven into and integrated into the structure of the fabric layers 7,8.

[0084] The embodiment shown in FIGS. 20-25 also includes an integrated inflator 11 operable to direct a flow of inflation gas into the inflatable chamber 10, thereby inflating the airbag 1 to the inflated condition shown in FIGS. 3 and 4. It is proposed that the inflator 11 may be manually operable, e.g., repeatedly operable, by a user 2 of the airbag 1, for example, to inflate the airbag 1 before each potentially dangerous activity requiring impact protection. In this type of proposal, the inflator 11 may take the form of an electrically operable compressor, but alternatively, it may simply take the form of a valve for connection to a separate compressor or pump. However, it should be understood that, as with the above-described embodiment of FIGS. 1-10, in alternative embodiments, the airbag 1 may be provided in combination with an alternative type of inflator, which may be operably connected to a sensor (not shown), such as an impact sensor or accelerometer, configured to output an activation signal to the inflator in response to detecting the user 2 falling or being thrown from a motorcycle or the like in an accident. As will be appreciated, upon receiving such an activation signal, the inflator is activated to direct a quantity of inflation gas into the inflatable chamber 10 of the airbag, thereby inflating the airbag 1 to an inflated state, as shown in Figures 22 and 23.

[0085] The airbag 1 of FIGS. 20 to 25 comprises a fixing device that includes a pair of releasable buckles 42 (or clasps) at the front of the airbag 1 and a pair of gussets 43 at each side of the airbag 1.

[0086] Each buckle 42 comprises two cooperating, releasably interconnecting portions 42a, 42b, as shown most clearly in Figures 20 and 21. Each portion 42a, 42b of each buckle 42 is connected directly to the fabric of the airbag 1 at a respective fabric tab 44 by a respective stitching line, as shown diagrammatically at 45 in Figure 20. Each tab 44 is "one-piece woven" from the yarns of both fabric layers 7, 8, and thus forms a projecting portion of the perimeter seam 9.

[0087] Each gusset 43 takes the form of a rectangular fabric insert, which in some embodiments may be stretchable. Each gusset 43 is connected between a pair of edge regions 46 of the fabric airbag by stitching lines, such as those shown schematically at 47 in FIG. 20. Like fabric tabs 44, fabric edge regions 46 are "woven in one piece" from the yarns of both fabric layers 7, 8, and thus form the overhanging portion of perimeter seam 9.

[0088] In any of the above-described and illustrated embodiments, one or both of the fabric layers 7, 8 may be laminated or otherwise layered outwardly with another fabric layer, such as, for example, a nonwoven layer. This may be advantageous to provide a more visually appealing surface texture and / or to provide a softer surface.

[0089] Furthermore, although the illustrated embodiment is described above as being produced by a so-called "one-piece weaving" technique in which the yarns of one fabric layer 7 interweave with the yarns of the other fabric layer 8 to define the perimeter seam 9 and optional other seams 12, 17, 30 that are woven into and integral to the structure of the fabric layers 7, 8, this is not believed to be necessary in all embodiments. For example, embodiments are envisioned in which the fabric layers 7, 8 are simply sewn or glued together to form the seams 9, 12, 17, 30.

[0090] The features disclosed in the above description or the following claims or the accompanying drawings, whether presented in a particular form or in terms of means for performing a disclosed function or methods or steps for conveniently obtaining a disclosed result, may be used separately or in any combination of such features to realize the invention in diverse forms thereof.

[0091] While the present invention has been described in conjunction with the exemplary embodiments set forth above, many equivalent modifications and variations will be apparent to those skilled in the art given this disclosure. Accordingly, the exemplary embodiments of the invention set forth above are considered to be illustrative and not limiting. Various modifications to the described embodiments may be made without departing from the scope of the invention.

[0092] For the avoidance of doubt, any theoretical explanations provided herein are provided for the purpose of enhancing the understanding of the reader, and the inventors do not wish to be bound by any of these theoretical explanations.

[0093] Any section headings used herein are for organizational purposes only and should not be construed as limiting the subject matter described.

[0094] Throughout this specification, including the claims which follow, unless the context requires otherwise, the words "have," "comprise," and "include," as well as variations such as "having," "comprises," "comprising," and "including," are understood to imply the inclusion of a stated integer or step or group of integers or steps, but not the exclusion of any other integer or step or group of integers or steps.

[0095] It must be noted that, as used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural references unless the context requires otherwise. Ranges may be expressed herein as from "about" one particular value and / or to "about" another particular value. When such a range is expressed, another embodiment includes from the one particular value and / or to the other particular value. Similarly, when values ​​are expressed as approximations, by use of the antecedent "about," it will be understood that the particular value forms another embodiment. The term "about" in reference to numerical values ​​is optional and can mean, for example, + / - 10%.

[0096] The terms "preferred" and "preferably" are used herein to refer to embodiments of the invention that may provide certain benefits, under some circumstances. It is understood, however, that other embodiments may also be preferred, under the same or different circumstances. Thus, the recitation of one or more preferred embodiments does not mean or imply that other embodiments are not useful, and is not intended to exclude other embodiments from the scope of the present disclosure or from the claims.

Claims

1. A wearable impact protection airbag (1), the airbag (1) being a fabric airbag comprising a pair of superimposed woven fabric layers (7, 8) interconnected by a perimeter seam (9) to define an inflatable chamber (10) between the fabric layers (7, 8) for receiving inflation gas, the perimeter seam (9) defining at least a portion of the perimeter of the inflatable chamber (10), the airbag (1) comprising a fastening device (4, 5) configured to fasten the airbag (1) around a body part (3) of a wearer. wherein the anchoring device (4, 5, 15, 26, 42, 43) is connected directly to the fabric of the airbag (1), the airbag (1) having an initial uninflated state and configured to transition to a deployed and inflated state via inflation, the uninflated state including at least one fold within the airbag (1), and the airbag (1) is configured to unfold during inflation to cover a greater area of ​​the wearer's body part (3) in the inflated state than in the uninflated state.

2. 2. The wearable impact protection airbag (1) of claim 1, wherein an outer surface of the folded airbag (1) is visible in the uninflated state.

3. 3. The wearable impact protection airbag (1) according to claim 1 or 2, wherein the fastening device (4, 5, 15, 26, 42, 43) is directly connected to the fabric of the airbag (1) at the peripheral seam (9).

4. 4. The wearable impact protection airbag (1) according to any one of claims 1 to 3, wherein yarns of one of the fabric layers (7) are interwoven with yarns of the other of the fabric layers (8) to define the perimeter seam (9), whereby the perimeter seam (9) is woven into and integrated into the structure of the layers (7, 8).

5. 5. The wearable impact protection airbag (1) according to any one of claims 1 to 4, wherein the fastening device comprises a zipper (4) with two interlocking halves (4a, 4b), at least one half (4a, 4b) of the zipper (4) being directly connected to the peripheral seam (9).

6. 6. The wearable impact protection airbag (1) according to claim 5, wherein each half (4a, 4b) of the zipper (4) is directly connected to a respective area of ​​the peripheral seam (9).

7. The wearable impact protection airbag (1) according to any one of claims 1 to 6, wherein the fastening device comprises a strap (5) connected to the peripheral seam (9).

8. 8. The wearable impact protection airbag (1) according to any one of claims 1 to 7, wherein the fastening device comprises a waist strap (26) that fits around the waist of the wearer, the waist strap (26) extending through an integral fabric channel (31) defined between overlapped edge regions (28, 29) of the fabric layers (7, 8) outside the inflatable chamber (10).

9. 9. The wearable impact protection airbag (1) of claim 8, wherein yarns of one of the fabric layers (7) are interwoven with yarns of the other of the fabric layers (8) to interconnect the edge regions (28, 29) of the fabric layers (7, 8) along a woven edge seam (30) that is integral with the structure of the fabric layers (7, 8) and spaced from the perimeter seam (9), and wherein the fabric channel (31) is defined between the perimeter seam (9) and the edge seam (30).

10. The wearable impact protection airbag (1) according to any one of claims 1 to 9, wherein the fastening device comprises a buckle (42) or clasp connected directly to the peripheral seam (9).

11. 11. The wearable impact protection airbag (1) according to claim 10, wherein the buckle (42) or clasp comprises two interconnecting portions (42a, 42b), each portion (42a, 42b) of the buckle (42) or clasp being connected to a respective region of the peripheral seam (9).

12. 12. The wearable impact protection airbag (1) according to any one of claims 1 to 11, further comprising an integral fabric socket (18) defined between the respective overlapping edge regions (13, 14) of the fabric layers (7, 8) outside the inflatable chamber (10), the fabric socket (18) releasably receiving and engaging an anchor (15) forming part of the fixing device.

13. 13. The wearable impact protection airbag (1) of claim 12, wherein the fabric socket (18) comprises a cavity (19) around which the edge regions (13, 14) of the fabric layers (7, 8) are interconnected to define the socket (18), the cavity (19) having an opening (20) distal to the inflatable chamber (10) across which the edge regions (13, 14) of the fabric layers (7, 8) are not connected.

14. 14. The wearable impact protection airbag (1) according to claim 13, wherein yarns of one of the fabric layers (7) are interwoven with yarns of the other of the fabric layers (8) to interconnect the edge regions (13, 14) of the fabric layers (7, 8) around the cavity (19), thereby defining the socket (18).

15. 15. The wearable impact protection airbag (1) according to any one of claims 1 to 14, wherein the at least one fold is effective to overlap regions (9a, 9b) of the peripheral seam (9), and the airbag (1) comprises releasable interconnection means configured to interconnect the overlapped regions (9a, 9b) of the peripheral seam (9) in the uninflated state and to release the interconnection during inflation to the inflated state.

16. 16. The wearable impact protection airbag (1) according to claim 15, wherein the interconnection means comprises at least one of a releasable magnetic fastener, a releasable hook and loop fastener, and at least one button or snap.

17. 17. The wearable impact protection airbag (1) of any one of claims 1 to 16, wherein the airbag (1) has a reflex reflector (40) provided on a surface of the airbag (1) that is visible in the uninflated state but is hidden with respect to a portion of the wearer's body (3) in the inflated state.

Images