Lifesaving wader
By designing an airbag cavity in the life-saving waders that is attached to the surface of the bib and covers the water inlet, the problem of false triggering of the automatic inflation device is solved, thus improving the practicality and safety of the airbag.
Patent Information
- Application Number
- CN202423287345.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2034-12-30
AI Technical Summary
The automatic inflation device of existing life-saving waders is easily triggered by rain or splashing water, resulting in unnecessary airbag inflation and wasting resources.
A type of life-saving waders has been designed. When not inflated, the air bladder is attached to the surface of the bib, and the water inlet is covered by the air bladder to prevent rain or splashing water from triggering the inflation device. When inflated, it forms an air bladder to provide a life-saving function.
It effectively prevents accidental triggering, improves the practicality and safety of the life-saving waders, and the air bag serves two purposes, enhancing the rescue effect for workers.
Smart Images
Figure CN223751086U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of trousers for diving, in particular to a lifesaving trousers for diving. BACKGROUND
[0002] Professional protective clothing must be worn when working in a farm or salvaging, which has a waterproof function to ensure the comfort and stability of the physiological environment of the workers and support the smooth development of various fishing activities. The existing trousers for diving with a lifesaving airbag on the market are generally provided with a water-activated inflator. When the workers do not need to inflate the lifesaving airbag cavity in a safe situation, the inflator is easily wetted by rain or splashing water, triggering the inflation function, thereby causing waste of the automatic inflator. SUMMARY
[0003] The utility model provides a lifesaving trousers for diving to solve the technical problem that the automatic inflator on the lifesaving trousers for diving is easily wetted by rain or splashing water, triggering the inflation function, thereby causing waste of the automatic inflator.
[0004] The utility model discloses a lifesaving trousers for diving, comprising:
[0005] A trousers body is used for wearing on the lower body of a human being;
[0006] A clothing body comprises a hood, a wearing part and an airbag. The hood has a lower end connected to the trousers body and an upper end away from the trousers body. The lower end of the hood is integrally connected to the trousers body, and the upper end of the hood is worn on the upper body of a human being through the wearing part. The airbag has a connecting end, a floating end and an airbag cavity between the connecting end and the floating end. The connecting end is hot-pressed and bonded to the hood.
[0007] An automatic inflator is fixed to the outer surface or the inner surface of the hood. The automatic inflator comprises a gas cylinder and a water-activated part. The water-activated part is provided with a water inlet hole on the side away from the gas cylinder. The water inlet hole triggers the gas cylinder to inflate the airbag cavity after water enters.
[0008] When the airbag cavity is not inflated, the floating end is lowered to the lower end of the hood, the water inlet hole is covered by the airbag on the outer surface or the inner surface of the hood, and the upper side of the water inlet hole is shielded by the connecting end.
[0009] In one embodiment, the gas cylinder and the water-activated part are arranged and extended vertically, and the water inlet hole is closer to the upper end relative to the gas cylinder.
[0010] In one embodiment, the edge of the air bag is thermally bonded with the edge of the upper end; at the floating end, the air bag is attached to the outside of the apron when the air chamber is not inflated, the air bag and the apron form a water-avoiding cavity that is in communication with the outside world, and the water inlet hole is located in the water-avoiding cavity.
[0011] In one embodiment, the floating end is attached to the lower end by magic tape when the air chamber is not inflated, and the floating end automatically separates from the lower end when the air chamber is inflated.
[0012] In one embodiment, the automatic inflation device is located in the water-avoiding cavity, the life-saving wetsuit further comprises a first fixed cloth, the opposite edges of the first fixed cloth are integrally connected to the apron to form a first fixed through slot, and the water-activated part is provided in the first fixed through slot; the life-saving wetsuit further comprises a second fixed cloth, the opposite edges of the second fixed cloth are integrally connected to the apron to form a second fixed through slot, and the gas cylinder is provided in the second fixed through slot; wherein the first fixed through slot is opposite to and spaced from the second fixed through slot along the axial direction, and both the first fixed through slot and the second fixed through slot are located in the water-avoiding cavity.
[0013] In one embodiment, the automatic inflation device further comprises a pull rope provided between the gas cylinder and the water-activated part, and the pull rope is exposed to the gap between the first fixed through slot and the second fixed through slot.
[0014] In one embodiment, the life-saving wetsuit further comprises a blow nozzle, the blow nozzle is in communication with the air chamber, and the blow nozzle is provided on the outer surface of the air bag.
[0015] In one embodiment, the air bag comprises a first material layer and a second material layer stacked to form the air chamber, at the floating end, the edge of the first material layer is integrally connected with the edge of the second material layer; at the connecting end, the edge of the first material layer, the edge of the second material layer and the edge of the upper end are stacked and thermally bonded; when the air chamber is not inflated, the first material layer and the second material layer are sequentially stacked on the outside of the apron.
[0016] In one embodiment, the number of air bags is at least two, and the at least two air bags comprise a first bag and a second bag, the first bag and the second bag are located on the front and back of the apron respectively, and the water inlet hole is covered by the first bag or the second bag.
[0017] In one of the embodiments, the bib has a circumferentially extending bib cavity, which is in communication with the airbag cavity; the bib cavity includes a third material layer and a fourth material layer, at a portion of the boundary of the bib cavity, the third material layer is thermally bonded with the fourth material layer, at another portion of the boundary of the bib cavity, the third material layer forms an opening with the fourth material layer; at the opening position, the first material layer is thermally bonded with the third material layer, the second material layer is thermally bonded with the fourth material layer, and the opening forms a passage in communication with the airbag cavity and the bib cavity.
[0018] From the above technical solutions, the embodiments of the present application have at least the following advantages and positive effects:
[0019] The utility model discloses a life saving wading trousers, and the airbag cavity is attached to the surface of the bib when not being inflated, and covers the water inlet hole of the automatic inflator triggered by water at the same time, so as to prevent rain or splashed water from entering the automatic inflator through the water inlet hole and triggering the water triggered automatic valve, and the gas cylinder inflates the airbag cavity, that is, the airbag has the function of protecting the automatic inflator from being triggered by mistake when not being inflated. On the other hand, the airbag forms the airbag cavity after being inflated, so that the life saving wading trousers have the function of lifesaving. The airbag has two functions, and the practicability and safety of the life saving wading trousers are improved. BRIEF DESCRIPTION OF DRAWINGS
[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from the structures shown in the drawings without creative labor.
[0021] Figure 1 It is a whole structure schematic view of the life saving wading trousers of an embodiment of the present application.
[0022] Figure 2 It is a schematic view of the airbag attached to the outside of the bib in the life saving wading trousers shown in the figure. Figure 1
[0023] It is a sectional view of the upper half of the airbag along the direction A-A in the figure. Figure 3 Figure 1 It is a sectional view of the lower half of the airbag along the direction A-A in the figure.
[0024] Figure 4 Figure 1 It is a sectional view of the lower half of the airbag along the direction A-A in the figure.
[0025] Figure 5 It is a sectional view of the lower half of the airbag along the direction A-A in the figure. Figure 1 A sectional view of the upper half of the bib in the direction of B-B;
[0026] Figure 6 To be along Figure 1 A sectional view of the lower half of the bib in the direction of B-B.
[0027] The reference signs are explained as follows:
[0028] 10, life-saving pants; 100, pants body; 200, clothing body; 201, water-avoiding cavity; 210, bib; 211, lower end; 212, upper end; 213, bib cavity; 214, third material layer; 215, fourth material layer; 216, opening; 220, wearing part; 230, air bag; 231, connecting end; 232, floating end; 233, air bag cavity; 234, first material layer; 235, second material layer; 240, magic tape; 300, automatic inflating device; 310, gas cylinder; 320, water-encountering trigger part; 321, water inlet hole; 330, pull rope; 410, first fixing cloth; 411, first fixing through slot; 420, second fixing cloth; 421, second fixing through slot; 500, blowing nozzle. DETAILED DESCRIPTION
[0029] The typical embodiments embodying the features and advantages of the present application will be described in detail in the following description. It should be understood that the present application can be implemented in various ways, and all of the changes thereof do not deviate from the scope of the present application, and the description and drawings in the specification are used as an illustration rather than a limitation of the present application.
[0030] In addition, the terms "first", "second" are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.
[0031] In the description of the present application, it should be noted that, unless otherwise specifically defined and limited, the terms "mounting", "setting", "connection" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0032] Reference Figure 1, the waders are necessary to wear professional protective clothing when working in the farm or fishing, play a waterproof function, protect the physiological environment of the operator comfortable and stable, support the smooth development of various fishing activities. For the existing waders with life-saving air bag on the market, generally provided with a water-activated inflator, when the operator does not need to inflate the life-saving air bag cavity in a safe condition, the inflator is easy to be wet by rain or splashing water, triggering the inflation function, thereby causing the waste of the inflator. Based on this, the present application provides a life-saving wader 10 which is convenient and comfortable to wear, convenient for operation and good in life-saving effect. The life-saving wader 10 is in the form of a one-piece pant, comprising a pant body 100, a clothing body 200 and an automatic inflator 300. The pant body 100 is in the form of a split leg and is used for wearing on the lower body of a human body. The clothing body 200 is connected to the pant body and is used for wearing on the upper part of the human body. The automatic inflator 300 is connected to the clothing body 200 and is used as an inflation function.
[0033] Specifically, referring to Figure 1 , the clothing body 200 comprises a connecting hood 210, a wearing part 220 and an air bag. The hood 210 is used as a main body of a shirt and is worn on the upper body of a human body. The hood 210 has a lower side end 211 connected to the pant body 100 and an upper side end 212 away from the pant body 100. The lower side end 211 of the hood 210 is integrally connected to the pant body 100, and the upper side end 212 of the hood 210 is worn on the upper body of the human body through the wearing part 220. The air bag 230 has a connecting end 231, a floating end 232 and an air bag cavity 233 located between the connecting end 231 and the floating end 232. The connecting end 231 is hot-pressed and adhered to the hood 210, and the floating end 232 floats on the water surface after the air bag cavity 233 is inflated.
[0034] Continuing to refer to Figure 1 , the automatic inflator 300 is fixed to the outer surface or the inner surface of the hood 210. The automatic inflator 300 comprises a gas cylinder 310 and a water-activated part 320 connected in the axial direction. The gas cylinder 310 is filled with compressed gas, which includes but is not limited to carbon dioxide, inert gas and the like. The water-activated part 320 is provided with a water inlet hole 321 on the side away from the gas cylinder 310. The water inlet hole 321 triggers the gas cylinder 310 to inflate the air bag cavity 233 after water enters. Here, the water-activated part 320 can adopt a water-soluble tablet. After the tablet is dissolved, the gas cylinder 310 releases high-pressure gas to rapidly inflate the air bag cavity 233 to form a life-saving air bag.
[0035] In combination with reference to Figure 1 and Figure 2When the air bag cavity 233 is not inflated, the floating end 232 is drooping at the lower side end 211 of the apron 210, the water inlet hole 321 is covered by the air bag 230 to the outer surface or inner surface of the apron 210, and the upper side of the water inlet hole 321 is shielded by the connecting end 231 to prevent rain or splashing water from wetting the water-triggering part 320 to trigger the air cylinder 310 to inflate the air bag cavity 233.
[0036] The life-saving waders 10 provided by the present application have the air bag cavity 233 attached to the surface of the apron 210 when not inflated, and the water inlet hole 321 in the water-triggering part 320 is shielded to prevent rain or splashing water from entering the automatic inflation device 300 through the water inlet hole 321 to trigger the water-triggering valve, so that the air cylinder 310 inflates the air bag cavity 233. That is, the air bag 230 has the function of preventing accidental triggering of the automatic inflation device 300 when not inflated. On the other hand, the air bag 230 forms the air bag cavity 233 after being inflated, so that the life-saving waders 10 have the function of life-saving. The air bag 230 has two functions, which improves the practicability and safety of the life-saving waders 10.
[0037] Preferably, refer to Figure 1 or Figure 2 In an embodiment, the air cylinder 310 and the water-triggering part 320 are arranged and extended vertically (i.e., the automatic inflation device 300 is vertically fixed on the apron 210), and the water inlet hole 321 is closer to the upper side end 212 relative to the air cylinder 310, so that the vertical height of the water-triggering part 320 is higher than the height of the air cylinder 310, to improve the water level of the operator. It should be noted that in other embodiments of the present application, the relative vertical height of the air cylinder 310 and the water-triggering part 320 is not limited, i.e., in other embodiments, the automatic inflation device 300 can be inclined or horizontally fixed on the apron 210. Here, the water level refers to the water level that the life-saving waders 10 need to reach to trigger the air cylinder 310 to inflate the air bag cavity 233.
[0038] Preferably, refer to Figure 1 and Figure 2 In an embodiment, at the connecting end 231, the edge of the air bag 230 is hot-pressed and bonded with the edge of the upper side end 212; at the floating end 232, Figure 2As shown, when the airbag cavity 233 is not inflated, the airbag 230 is attached to the outer side of the apron 210, and the airbag 230 and the apron 210 form a water-avoiding cavity 201 in communication with the outside. The water inlet hole 321 is located in the water-avoiding cavity 201, and the upper end of the water inlet hole 321 is covered by the connecting end 231 to prevent rainwater or splashing water from entering the water-activated part 320 through the water inlet hole 321 to trigger the air cylinder 310 to inflate the airbag cavity 233. The edge of the airbag 230 is thermally bonded to the edge of the upper end 212, so that the connecting end 231 can block the water droplets falling from top to bottom, and the airbag 230 is naturally attached to the outer side of the apron. This conforms to the design of gravity. Of course, in this application, the position of the edge of the airbag 230 thermally bonded to the apron 210 is not limited, as long as it can cover the water inlet hole 321 to form a water-avoiding cavity 201. In other embodiments, the water-avoiding cavity 201 can be in communication with the outside up and down or obliquely on both sides.
[0039] Preferably, referring to Figure 2 In an embodiment, when the airbag cavity 233 is not inflated, the floating end 232 is attached to the lower end 211 by the magic tape 240, and when the airbag cavity 233 is inflated, the floating end 232 is automatically detached from the lower end 211. It should be noted that in this application, as long as the floating end 232 can be attached to the lower end 211, any method should be protected, including but not limited to magic tape 240, magnetic attraction, buckling, etc.
[0040] Preferably, in combination with reference to Figure 1 and Figure 2 In an embodiment, Figure 2 As shown, the automatic inflation device 300 is located in the water-avoiding cavity 201, Figure 1 As shown, the life jacket wetsuit 10 further comprises a first fixing cloth 410, and opposite side edges of the first fixing cloth 410 are integrally connected to the apron 210 to form a first fixing through slot 411 for the water-activated part 320 to pass through. The life jacket wetsuit 10 further comprises a second fixing cloth 420, and opposite side edges of the second fixing cloth 420 are integrally connected to the apron 210 to form a second fixing through slot 421 for the air cylinder 310 to pass through. The first fixing through slot 411 and the second fixing through slot 421 are opposite and spaced apart, and both are located in the water-avoiding cavity 201, that is, the automatic inflation device 300 passes through the first fixing through slot 411 and the second fixing through slot 421 in sequence along its axial direction to be further stably fixed to the apron 210. It should be noted that without considering the stability of the automatic inflation device 300 fixed to the apron 210, whether the first fixing cloth 410 and the second fixing cloth 420 are provided or not is not limited.
[0041] Preferably, in combination with reference to Figure 1 orFigure 2 In an embodiment, the automatic inflator 300 further comprises a pull rope 330 disposed between the gas cylinder 310 and the water-encountering trigger 320, the pull rope 330 being exposed to the gap between the first fixed slot 411 and the second fixed slot 421, so that the worker can manually pull the pull rope 330 to trigger the gas cylinder 310 to inflate the airbag cavity 233 when encountering danger, so as to achieve manual control of the automatic inflator 300 to inflate the airbag cavity 233 and achieve the purpose of lifesaving. It should be noted that in the present application, the presence or absence of the pull rope 330 is not limited.
[0042] Preferably, in combination with reference to Figure 1 and Figure 2 In an embodiment, the life-saving waders 10 further comprise a gas blowing nozzle 500, the gas blowing nozzle 500 being in communication with the airbag cavity 233 to blow gas into the airbag cavity 233, the gas blowing nozzle 500 being disposed on the outer surface of the gas bag 230. It should be noted that in the present application, the presence or absence of the gas blowing nozzle 500 is not limited.
[0043] Preferably, in combination with reference to Figure 3 and Figure 4 In an embodiment, the gas bag 230 comprises a first material layer 234 and a second material layer 235 enclosing the airbag cavity 233, at the floating end 232, the edge of the first material layer 234 and the edge of the second material layer 235 are integrally connected, the implementation of the integral connection herein includes but is not limited to heat pressing adhesion, integral molding and other processing methods. At the connecting end 231, the edge of the first material layer 234, the edge of the second material layer 235 and the edge of the upper side end 212 are stacked and heat pressed to seamlessly bond the connecting end 231 of the gas bag 230 to the upper side end 212 of the hood 210. When the airbag cavity 233 is not inflated, the first material layer 234 and the second material layer 235 are stacked in turn on the outside of the hood 210. When the gas bag 230 is inflated to form the airbag cavity 233, the floating water level of the airbag cavity 233 is just flush with the upper side end 212, the worker's head is out of the water, so as to reach the required drowning height, facilitating the worker's self-rescue and rescue. It should be noted that the position of the connecting end 231 of the gas bag 230 connected to the hood 210 is not limited, as long as it is connected between the lower side end 211 and the upper side end 212.
[0044] Preferably, in one embodiment, the number of air bags 230 is at least two, including a first bag and a second bag (not shown). The first bag and the second bag are located on the front and back of the bib 210 respectively (i.e., corresponding to the chest and back of the human body), so that the two air bags 230 can ensure the relative balance of the human body after inflation and prevent tipping over. The water inlet 321 is covered by the first bag or the second bag. It should be noted that in this application, the number and position of the air bags 230 are not limited. In other embodiments, the number can be one draped over the chest, or two located on the left and right sides of the bib 210, or the number of air bags can be two or more and distributed circumferentially around the perimeter of the bib 210.
[0045] Preferably, in conjunction with reference Figures 3-6 In one embodiment, Figure 1 As illustrated, the bib 210 also has a circumferentially connected bib cavity 213, which is connected to the airbag cavity 233. Specifically, in conjunction with Figure 5 and Figure 6 The bib cavity 213 includes a third material layer 214 and a fourth material layer 215. At a portion of the boundary of the bib cavity 213, the third material layer 214 and the fourth material layer 215 are heat-pressed together. At another portion of the boundary of the bib cavity 213, the third material layer 214 and the fourth material layer 215 enclose and form an opening 216. Figure 5 (As shown). At the opening 216, the first material layer 234 and the third material layer 214 are heat-pressed together, and the second material layer 235 and the third material layer 214 are heat-pressed together, forming a channel connecting the airbag cavity 233 and the bib cavity 213. Here, the boundary position of the bib cavity 213 refers to the upper end 212 of the bib 210. It should be noted that both the connected airbag cavity 233 and the bib cavity 213 are used as rescue airbags, increasing the buoyancy of the rescue airbags. Therefore, the bib cavity 213 on the bib 210 further improves the safety of the life-saving waders 10. In other embodiments of this application, the presence or absence of the bib cavity 213 is not limited, and the airbag cavity 233 can meet the safety and life-saving requirements of the life-saving waders.
[0046] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.
Claims
1. A life vest, characterized in that The utility model relates to a life-saving wetsuit, comprising: a pants body for wearing on the lower body of a human being; a garment body comprising a skirt, a wearing part and an air bag, the skirt having a lower end connected to the pants body and an upper end away from the pants body, the lower end of the skirt being integrally connected to the pants body, the upper end of the skirt being worn on the upper body of a human being through the wearing part, the air bag having a connecting end, a floating end and an air chamber between the connecting end and the floating end, the connecting end being heat-pressed and bonded to the skirt; an automatic inflation device fixed to the outer surface or the inner surface of the skirt, the automatic inflation device comprising an air cylinder and a water-activated trigger, the water-activated trigger being provided with a water inlet hole on the side away from the air cylinder; the water inlet hole triggers the air cylinder to inflate the air chamber after water enters; wherein, when the air chamber is not inflated, the floating end is drooping at the lower end of the skirt, the water inlet hole is covered by the air bag on the outer surface or the inner surface of the skirt, and the upper side of the water inlet hole is shielded by the connecting end.
2. The life-saving swim pant of claim 1, wherein, The air cylinder and the water-activated trigger are arranged and extended along the vertical direction, and the water inlet hole is closer to the upper end relative to the air cylinder.
3. The life vest swim pant of claim 1, wherein, At the connecting end, the edge of the air bag is heat-pressed and bonded to the edge of the upper end; at the floating end, when the air chamber is not inflated, the air bag is attached to the outer side of the skirt, the air bag and the skirt form a water-avoiding chamber that is in communication with the outside world on the left and right sides, and the water inlet hole is located in the water-avoiding chamber.
4. The life vest swim pant of claim 3, wherein, When the air chamber is not inflated, the floating end is attached to the lower end by magic tape, and when the air chamber is inflated, the floating end is triggered to automatically detach from the lower end.
5. The life vest swim pant of claim 3, wherein, The automatic inflation device is located in the water-avoiding chamber, the life-saving wetsuit further comprises a first fixing cloth, the opposite two side edges of the first fixing cloth are integrally connected to the skirt to form a first fixed through slot, and the first fixed through slot is provided for the water-activated trigger; the life-saving wetsuit further comprises a second fixing cloth, the opposite two side edges of the second fixing cloth are integrally connected to the skirt to form a second fixed through slot, and the second fixed through slot is provided for the air cylinder; wherein the first fixed through slot is opposite to and spaced from the second fixed through slot along the axial direction, and both the first fixed through slot and the second fixed through slot are located in the water-avoiding chamber.
6. The life vest pant of claim 5, wherein, The automatic inflation device further comprises a pull rope provided between the air cylinder and the water-activated trigger, and the pull rope is exposed in the gap between the first fixed through slot and the second fixed through slot.
7. The life vest swim pant of claim 1, wherein, The life-saving wetsuit further comprises a blowing nozzle, the blowing nozzle is in communication with the air chamber, and the blowing nozzle is provided on the outer surface of the air bag.
8. The life vest pant of any of claims 1-7, wherein, The air bag comprises a first material layer and a second material layer stacked to form the air chamber, and at the floating end, the edge of the first material layer is integrally connected to the edge of the second material layer; At the connecting end, the edge of the first material layer, the edge of the second material layer and the edge of the upper end are stacked and heat-pressed and bonded; when the air chamber is not inflated, the first material layer and the second material layer are sequentially stacked on the outer side of the skirt.
9. The life vest pant of claim 8, wherein, The number of the air bags is at least two, and the at least two air bags include a first bag and a second bag, the first bag and the second bag are respectively located at the front and back of the bib, and the water inlet hole is covered by the first bag or the second bag.
10. The life vest pant of claim 8, wherein, The bib has a circumferentially extending bib cavity, the bib cavity is in communication with the air bag cavity; the bib cavity includes a third material layer and a fourth material layer, at a part of the boundary of the bib cavity, the third material layer is heat-pressed and bonded with the fourth material layer, and at another part of the boundary of the bib cavity, the third material layer forms an opening with the fourth material layer. At the opening position, the first material layer is heat-pressed and bonded with the third material layer, the second material layer is heat-pressed and bonded with the fourth material layer, and the opening forms a channel in communication with the air bag cavity and the bib cavity.