Moisture-permeable waterproof shoe capable of preventing vamp from being cracked and damaged

By designing the barrier structure between the protective member and the first main piece in the socks and shoes, the problem of easy cracking of the upper during squatting and jumping is solved, and the wear resistance and use stability of the upper are achieved.

CN222888657UActive Publication Date: 2025-05-23LEGO STONE CO LTD
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Patent Information

Application Number
CN202421619026.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-10
Publication Date
2025-05-23
Estimated Expiration
2034-07-10

AI Technical Summary

Technical Problem

When existing socks and shoes are squatting and jumping, the friction between the outer trim and the upper causes the upper to crack.

Method used

A moisture-permeable waterproof shoe including a sole, an upper unit, an inner sleeve unit, a follower layer and a tightening unit is designed. The protective member is sewn with the first main piece body to block the first main piece body and the upper unit to prevent frictional damage.

Benefits of technology

The friction between the first main sheet body and the upper unit is effectively prevented, and the problem of cracking of the upper due to friction is avoided, while improving the stability and comfort of the shoe.

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Abstract

The utility model discloses a pair of moisture-permeable waterproof shoes capable of preventing vamps from being cracked and damaged. Each shoe comprises a sole, a vamp unit defining an internal space, an inner sleeve unit which is arranged in the internal space and is moisture-permeable and waterproof, a bonding layer and a lacing unit, the lacing unit comprises a first lacing piece combination body connected with the shoe sole, a second lacing piece combination body connected with the shoe sole and at least one lacing belt combination body, the first lacing piece combination body is provided with a first main piece body and a protection piece, the first main piece body is provided with a piece body front edge, the protection piece is adjacent to the piece body front edge, and the protection piece is connected with the first main piece body. The first lacing piece combination body is provided with a first main piece body and is blocked between the first main piece body and the vamp unit, the front edge of the piece body does not exceed the protection piece in the front-back direction, and the second lacing piece combination body is provided with a second main piece body opposite to the first main piece body.
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Description

Technical Field

[0001] The utility model relates to a pair of shoes, in particular to a pair of moisture-permeable and waterproof shoes which can prevent the upper of the shoe from being cracked. Background Art

[0002] like Figure 1 , 2 As shown, a conventional sock shoe comprises a sole 1, a vamp 2 disposed on the sole 1, and a tightening unit 3 connected to the sole 1. The tightening unit 3 comprises an outer decorative piece 301, an inner decorative piece 302, and an elastic band 303 passing through the outer decorative piece 301 and the inner decorative piece 302.

[0003] Although this type of sock shoe is more comfortable to wear than ordinary shoes, since the materials of the outer decorative piece 301 and the inner decorative piece 302 are relatively hard leather, and the material of the upper 2 is relatively soft woven fabric, when the sock shoe is bent and deformed due to the user's squatting and jumping movements, the front edge of the outer decorative piece 301 will directly rub against the upper 2, causing the upper 2 to easily crack at the place where it rubs against the outer decorative piece 301. Utility Model Content

[0004] Therefore, an object of the present invention is to provide a moisture-permeable and waterproof shoe that can overcome at least one disadvantage of the prior art and prevent the upper from being damaged.

[0005] Therefore, the moisture-permeable and waterproof shoes capable of preventing the upper from being damaged include a sole, an upper unit, an inner sleeve unit, a bonding layer, and a tightening unit.

[0006] The upper unit is arranged on the sole and defines an inner space.

[0007] The inner cover unit is arranged in the inner space and is moisture-permeable and waterproof. The inner cover unit defines a wearing space with an open top and a closed bottom.

[0008] The bonding layer is fixed between the upper unit and the inner cover unit.

[0009] The tightening unit includes a first tightening sheet assembly connected to the sole, a second tightening sheet assembly connected to the sole, and at least one tightening belt assembly connected between the first tightening sheet assembly and the second tightening sheet assembly. The first tightening sheet assembly has a first main sheet body and a protective member. The first main sheet body has a sheet front edge. The protective member is adjacent to the sheet front edge and blocks the first main sheet body and the upper unit. The sheet front edge does not exceed the protective member in the front-to-back direction. The second tightening sheet assembly has a second main sheet body relative to the first main sheet body. The first main sheet body and the second main sheet body are located on both sides of the upper unit in the left-right direction.

[0010] The utility model discloses a moisture-permeable and waterproof shoe capable of preventing the upper from being damaged by cracks. The protective piece is sewn together with the first main sheet body and is provided with a protective bottom end portion connected with the sole.

[0011] The utility model is a breathable and waterproof shoe capable of preventing the upper from being damaged by cracks. The first tightening sheet assembly further comprises a first connecting member and a ring arranged on the first main sheet body. The first main sheet body comprises a first bottom end connected to the sole and a first top end, and the first top end is formed with a plurality of first band through-holes arranged at intervals. The second main sheet body comprises a second bottom end connected to the sole and a second top end, and the second top end is formed with a plurality of second band through-holes arranged at intervals. The protective member further comprises a protective top end, and the protective top end is higher than the first top end in the up-down direction and is formed with a ring through-hole. , the loop is arranged in the loop through-hole, the loop is located in front of the first belt through-hole in the front-to-back direction, the tightening belt assembly has an elastic tightening belt, and a second connecting piece arranged on the elastic tightening belt, the elastic tightening belt has a fixed end, a free end, and a tightening section connected between the fixed end and the free end, the fixed end is fixed to one of the first belt through-holes, the second connecting piece is arranged at the free end, the tightening section passes through the remaining first belt through-holes, the second belt through-holes and the loop until the second connecting piece can be detachably fastened to the first connecting piece.

[0012] The utility model discloses a breathable and waterproof shoe capable of preventing the upper from being damaged by cracking. The tightening belt assembly further comprises a third connecting member and a fourth connecting member. The third connecting member is arranged at the tightening section and is adjacent to the fixed end portion. The fourth connecting member is arranged at the fixed end portion. The fixed end portion passes through one of the first belt through-holes until the fourth connecting member can be detachably fastened to the third connecting member.

[0013] The utility model is a breathable and waterproof shoe that can prevent the upper from cracking. The first tightening sheet assembly also has a first belt body extending backward from the first main sheet body, and a first combining piece arranged on the first belt body. The second tightening sheet assembly also has a second belt body extending backward from the second main sheet body, and a second combining piece arranged on the second belt body. The second belt body goes around the rear side of the upper unit until the second combining piece can be detachably fastened to the first combining piece.

[0014] The utility model discloses a moisture-permeable and waterproof shoe capable of preventing the upper from being damaged by cracks. The first connecting member and the second connecting member are a kind of Velcro, the third connecting member and the fourth connecting member are a kind of Velcro, and the first combining member and the second combining member are a kind of Velcro.

[0015] The utility model discloses a moisture-permeable and waterproof shoe capable of preventing the shoe upper from being damaged by cracks. The protective piece is made by folding an elastic band in half.

[0016] The utility model discloses a breathable and waterproof shoe capable of preventing the upper from being cracked. The inner sleeve unit comprises an inner sleeve defining the wearing space, the inner sleeve having a top opening end edge, the upper unit comprises a sock body defining the internal space, a sleeve-wearing portion extending upward from the sock body, and an annular sewing portion extending downward from the sleeve-wearing portion, the sleeve-wearing portion being higher than the top opening end edge in the up-down direction and defining a sleeve-wearing shoe opening communicating with the wearing space, the annular sewing portion extending downward into the wearing space of the inner sleeve and being fixed to the inner surface of the inner sleeve, the bottom edge of the annular sewing portion being lower than the top opening end edge in the up-down direction, the first main sheet body being fitted to the sock body portion, and the second main sheet body being fitted to the sock body portion.

[0017] The utility model discloses a moisture-permeable and waterproof shoe capable of preventing the upper from being damaged by cracks. The upper unit is folded back to form the sleeve-wearing part and the annular sewing part.

[0018] The utility model discloses a breathable waterproof shoe capable of preventing the upper from being cracked. The inner sleeve unit also includes a waterproof group. The inner sleeve is made by sewing inner sleeve cut pieces. The inner sleeve cut pieces include a lining layer, a surface fabric layer, a support layer arranged between the lining layer and the surface fabric layer, and a breathable waterproof layer fixedly arranged on the outer surface of the surface fabric layer. The waterproof group includes a plurality of waterproof strips, which are fixedly connected to the outer surface of the inner sleeve to cover the sewing parts of the inner sleeve.

[0019] The effect of the utility model is that the utility model utilizes the protective component to cooperate with the design of the first main sheet. During the bending and deformation process of the utility model, the protective component will block between the first main sheet and the upper unit, which can effectively prevent the front edge of the first main sheet from directly rubbing against the upper unit, so as to avoid the problem of cracking of the upper unit due to friction with the first main sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional appearance diagram of an existing sock shoe;

[0021] Figure 2 It is a reference diagram of the socks and shoes in a usage state;

[0022] Figure 3 It is a three-dimensional appearance diagram of an embodiment of the moisture-permeable and waterproof shoe capable of preventing the upper from cracking and damage according to the utility model;

[0023] Figure 4 is a side view of the embodiment;

[0024] Figure 5 is an exploded perspective view of the embodiment;

[0025] Figure 6 is a partially cutaway stereoscopic view of the embodiment;

[0026] Figure 7 is a combined cross-sectional schematic diagram of the embodiment in which a tightening unit is omitted;

[0027] Figure 8 yes Figure 7 An incomplete enlarged view of a portion of

[0028] Fig. 9 It is along Figure 4 A sectional view taken along line IX-IX in FIG.

[0029] Fig.10 is similar to Figure 7 , illustrating a user pulling apart a sleeve portion of a shoe upper unit of the embodiment to insert a portion of the foot into the embodiment;

[0030] Fig.11 It is a reference diagram of the use state of the embodiment, illustrating the bending deformation of the embodiment. DETAILED DESCRIPTION

[0031] The utility model is described in detail below with reference to the accompanying drawings and embodiments.

[0032] See also Figure 3 , 45 is an embodiment of the present invention of a breathable and waterproof shoe 100 capable of preventing the upper from cracking. The breathable and waterproof shoe 100 comprises a sole 10, an upper unit 20, an inner sleeve unit 30, and a bonding layer 40 (see Figure 8 ), and a tightening unit 50.

[0033] like Figure 5 , 6 As shown in FIGS. 7 and 8 , the upper unit 20 is disposed on the sole 10 and includes a body portion 21 defining an inner space 24, a sleeve portion 22 extending upward from the body portion 21, and an annular sewing portion 23 extending downward from the sleeve portion 22. In this embodiment, the upper unit 20 is a knitted sock.

[0034] like Figure 7 , 8 As shown, the inner sleeve unit 30 is disposed in the inner space 24 and is moisture permeable and waterproof. In this embodiment, the inner sleeve unit 30 includes an inner sleeve 31 defining a wearing space 34 with an open top and a closed bottom, and a waterproof group 32.

[0035] The inner sleeve 31 has a top opening edge 311 , and the wearing space 34 forms a sleeve insertion opening 341 surrounded by the top opening edge 311 .

[0036] The sleeve-wearing portion 22 is higher than the top opening edge 311 in a vertical direction and defines a sleeve-wearing opening 25 communicating with the wearing space 34. In this embodiment, the sleeve-wearing opening 25 has a first opening width W1 in a front-to-back direction, and the sleeve-entering opening 341 has a second opening width W2 in the front-to-back direction.

[0037] In this embodiment, the inner cover 31 is made by sewing an inner cover piece 33, and the inner cover piece 33 has a lining layer 331, a surface layer 332, a support layer 333 disposed between the lining layer 331 and the surface layer 332, and a moisture-permeable waterproof layer 334 fixed to the outer surface of the surface layer 332. The waterproof group 32 has a plurality of waterproof strips 321, and the waterproof strips 321 are fixed to the outer surface of the inner cover 31 to cover the sewing parts of the inner cover 31.

[0038] In this embodiment, the support layer 333 is an upright pile layer woven between the lining layer 331 and the surface layer 332 . However, the present invention is not limited thereto. In other variations, the support layer 333 may also be a foam layer.

[0039] The annular sewing portion 23 of the upper unit 20 extends downward into the wearing space 34 of the inner sleeve 31 and is fixed to the inner surface of the inner sleeve 31. The bottom edge of the annular sewing portion 23 is lower than the top opening end edge 311 in the vertical direction. It can be understood that in this embodiment, during the manufacturing process of the upper unit 20, the top end of the upper unit 20 is folded back into the wearing space 34 of the inner sleeve 31 to form the sleeve wearing portion 22 and the annular sewing portion 23. The annular sewing portion 23 is sewn and fixed to the lining layer 331 (see FIG. 2 ). Figure 7 , Figure 8 ).

[0040] The adhesive layer 40 is fixed between the sock body 21 of the upper unit 20 and the inner sleeve unit 30 to make the sock body 21 and the inner sleeve unit 30 fit tightly. In this embodiment, the adhesive layer 40 is made of adhesive, which is a known material in the prior art.

[0041] like Figure 5 , 6 As shown in FIGS. 9 , the tightening unit 50 includes a first tightening sheet assembly 60 connected to the sole 10 , a second tightening sheet assembly 70 connected to the sole 10 , and a tightening belt assembly 80 connected between the first tightening sheet assembly 60 and the second tightening sheet assembly 70 .

[0042] In this embodiment, the first tightening plate assembly 60 has a first main plate body 61, a protective member 62, a first connecting member 63 arranged on the first main plate body 61, a ring 64, a first belt body 65 extending backward from the first main plate body 61, and a first combining member 66 arranged on the first belt body 65.

[0043] The first main plate 61 has a first bottom portion 611 connected to the sole 10 , a first top portion 612 , and a plate front edge 613 . The first top portion 612 is formed with a plurality of first belt through holes 614 disposed at intervals.

[0044] The protective member 62 is adjacent to the front edge 613 of the sheet body and is blocked between the first main sheet body 61 and the upper unit 20. The front edge 613 of the sheet body does not exceed the protective member 62 in the front-to-back direction (see Figure 4 ).

[0045] In this embodiment, the protective member 62 is sewn together with the first main plate 61, and has a protective bottom end 621 connected to the sole 10, and a protective top end 622. The protective top end 622 is higher than the first top end 612 in the up-down direction, and is formed with a ring through hole 623, and the ring 64 is arranged in the ring through hole 623, and the ring 64 is located in front of the first belt through hole 614 in the front-back direction (see Figure 4). Preferably, the protective member 62 is made by folding an elastic band 624 in half.

[0046] In this embodiment, the second tightening plate assembly 70 has a second main plate 71 relative to the first main plate 61 , a second belt 72 extending rearward from the second main plate 71 , and a second coupling member 73 disposed on the second belt 72 .

[0047] The second main plate 71 has a second bottom portion 711 connected to the sole 10 and a second top portion 712 . The second top portion 712 is formed with a plurality of second belt through holes 713 disposed at intervals.

[0048] The second strap 72 can pass around the rear side of the upper unit 20 to allow the second connecting member 73 to be detachably fastened to the first connecting member 66 .

[0049] In this embodiment, the first main plate 61 and the second main plate 71 are located on both sides of the sock body 21 of the upper unit 20 in a left-right direction, and the first main plate 61 fits the sock body 21 , and the second main plate 71 fits the sock body 21 .

[0050] In this embodiment, the tightening belt assembly 80 comprises an elastic tightening belt 81 , a second connecting member 82 disposed on the elastic tightening belt 81 , a third connecting member 83 , and a fourth connecting member 84 .

[0051] The elastic tightening band 81 has a fixed end 811 , a free end 812 , and a tightening section 813 connected between the fixed end 811 and the free end 812 .

[0052] The third connecting member 83 is arranged on the tightening section 813 and adjacent to the fixed end 811, and the fourth connecting member 84 is arranged on the fixed end 811. The fixed end 811 passes through one of the first belt perforations 614 so that the fourth connecting member 84 can be removably fastened to the third connecting member 83 to allow the fixed end 811 to be fixed to one of the first belt perforations 614.

[0053] The second connecting member 82 is disposed at the free end portion 812 , and the tightening section 813 can pass through the remaining first belt through-holes 614 , the second belt through-holes 713 and the ring 64 to enable the second connecting member 82 to be detachably fastened to the first connecting member 63 .

[0054] In this embodiment, the first connecting member 63 and the second connecting member 82 are a kind of Velcro, the third connecting member 83 and the fourth connecting member 84 are a kind of Velcro, and the first combining member 66 and the second combining member 73 are a kind of Velcro.

[0055] By this, Fig.10 As shown, when the user wants to wear the breathable waterproof shoe 100 of the utility model, he can use both hands to pull the sleeve portion 22 forward and backward respectively, so that the first opening width W1 of the sleeve portion 22 becomes larger than the second opening width W2 of the sleeve entry opening 341 of the inner sleeve 31, thereby increasing the shoe entry angle, so that the user can easily insert the foot into the sleeve portion 22. The user can then pass through the second belt body 72 (see Figure 6 ) and the elastic tightening belt 81 (see Figure 6 ) to adjust the tightness of the upper unit 20 on the foot.

[0056] like Fig.11 As shown, when the breathable and waterproof shoe 100 of the present invention is bent and deformed due to the user's squatting and jumping movements, the protective member 62 will block between the first main plate 61 and the sock body 21 of the upper unit 20, preventing the front edge 613 of the first main plate 61 from directly rubbing against the sock body 21.

[0057] Through the above description, the advantages of the utility model can be summarized as follows:

[0058] 1. Compared with the prior art, the present invention utilizes the design of the protective member 62 in conjunction with the first main plate 61. During the bending and deformation process of the present invention, the protective member 62 will block between the first main plate 61 and the sock body 21 of the upper unit 20, and can effectively prevent the front edge 613 of the first main plate 61 from directly rubbing against the sock body 21, thereby avoiding the problem of the sock body 21 being cracked due to the friction with the first main plate 61.

[0059] 2. The utility model utilizes the design of the first tightening sheet assembly 60 and the second tightening sheet assembly 70 in conjunction with the tightening belt assembly 80. The elastic tightening belt 81 can make the second connecting member 82 detachably fastened to the first connecting member 63 after tightening the first main sheet 61 and the second main sheet 71. The second belt body 72 can make the second connecting member 73 detachably fastened to the first connecting member 66 after passing around the rear side of the upper unit 20. In this way, the user can adjust the tightness of the upper unit 20 on the user's foot through the elastic tightening belt 81 and the second belt body 72, so as to effectively prevent the user's foot from easily slipping out of the inner sleeve 31, thereby further improving the user's stability when wearing.

[0060] 3. The utility model utilizes the design of the sleeve-wearing portion 22 of the upper unit 20 in conjunction with the inner sleeve 31 to reduce the height of the top opening edge 311 of the inner sleeve 31 at the height of the user's ankle, thereby effectively increasing the second opening width W2 of the sleeve-entry opening 341 of the inner sleeve 31. Moreover, the user can relatively open the sleeve-wearing portion 22 to further expand the first opening width W1 of the sleeve-wearing shoe opening 25 of the sleeve-wearing portion 22 to be larger than the second opening width W2 of the sleeve-entry opening 341 of the inner sleeve 31, thereby effectively increasing the shoe-entry angle.

[0061] In summary, the moisture-permeable and waterproof shoe 100 capable of preventing the upper from cracking of the present invention can not only effectively prevent the first main plate 61 from directly rubbing against the upper unit 20 during the bending and deformation process, thereby avoiding the problem of cracking of the upper unit 20 due to the friction between the first main plate 61 and the upper unit 20, but also can effectively prevent the user's feet from easily slipping out of the shoe, so the purpose of the present invention can be achieved.

[0062] The above description is only an embodiment of the present utility model, and should not be used to limit the scope of the present utility model. That is, all simple equivalent changes and modifications made according to the claims and the description of the present utility model are still within the scope of the present utility model.

Claims

1. A breathable and waterproof shoe capable of preventing the upper from cracking, comprising a sole, an upper unit, an inner sleeve unit, a bonding layer, and a tightening unit, characterized in that: The upper unit is arranged on the sole and defines an internal space; The inner cover unit is arranged in the inner space and is moisture permeable and waterproof. The inner cover unit defines a wearing space with an open top and a closed bottom. The bonding layer is fixed between the upper unit and the inner cover unit; and The tightening unit includes a first tightening sheet assembly connected to the sole, a second tightening sheet assembly connected to the sole, and at least one tightening belt assembly connected between the first tightening sheet assembly and the second tightening sheet assembly. The first tightening sheet assembly has a first main sheet body and a protective member. The first main sheet body has a sheet front edge. The protective member is adjacent to the sheet front edge and blocks the first main sheet body and the upper unit. The sheet front edge does not exceed the protective member in the front-to-back direction. The second tightening sheet assembly has a second main sheet body relative to the first main sheet body. The first main sheet body and the second main sheet body are located on both sides of the upper unit in the left-right direction.

2. The moisture-permeable and waterproof shoe capable of preventing the upper from cracking according to claim 1, characterized in that: The protective member is sewn together with the first main sheet and has a protective bottom end portion connected to the sole.

3. The moisture-permeable and waterproof shoe capable of preventing the upper from cracking according to claim 2, characterized in that: The first tightening sheet assembly also has a first connecting piece and a ring arranged on the first main sheet body, the first main sheet body has a first bottom end connected to the sole, and a first top end, the first top end is formed with a plurality of first band through holes arranged at intervals, the second main sheet body has a second bottom end connected to the sole, and a second top end, the second top end is formed with a plurality of second band through holes arranged at intervals, the protective member also has a protective top end, the protective top end is higher than the first top end in the up and down direction, and is formed with a ring through hole, the ring is arranged at the The loop is through-hole, and the loop is located in front of the first belt through-hole in the front-to-back direction. The tightening belt assembly has an elastic tightening belt and a second connecting piece arranged on the elastic tightening belt. The elastic tightening belt has a fixed end, a free end, and a tightening section connected between the fixed end and the free end. The fixed end is fixed to one of the first belt through-holes, and the second connecting piece is arranged at the free end. The tightening section passes through the remaining first belt through-holes, the second belt through-holes and the loop until the second connecting piece can be detachably fastened to the first connecting piece.

4. The moisture-permeable and waterproof shoes capable of preventing the upper from cracking according to claim 3, characterized in that: The tightening belt assembly also has a third connecting member and a fourth connecting member. The third connecting member is arranged on the tightening section and adjacent to the fixed end. The fourth connecting member is arranged on the fixed end. The fixed end passes through one of the first belt through holes so that the fourth connecting member can be detachably fastened to the third connecting member.

5. The moisture-permeable and waterproof shoe capable of preventing the upper from cracking according to claim 4, characterized in that: The first tightening sheet assembly also has a first belt body extending backward from the first main sheet body, and a first coupling member arranged on the first belt body. The second tightening sheet assembly also has a second belt body extending backward from the second main sheet body, and a second coupling member arranged on the second belt body. The second belt body passes around the rear side of the upper unit until the second coupling member can be detachably fastened to the first coupling member.

6. The moisture-permeable and waterproof shoe capable of preventing the upper from cracking according to claim 5, characterized in that: The first connecting piece and the second connecting piece are a kind of Velcro, the third connecting piece and the fourth connecting piece are a kind of Velcro, and the first combining piece and the second combining piece are a kind of Velcro.

7. The moisture-permeable and waterproof shoe capable of preventing the upper from cracking according to claim 3, characterized in that: The protective piece is made by folding an elastic band in half.

8. The moisture-permeable and waterproof shoe capable of preventing the upper from cracking according to claim 1, characterized in that: The inner sleeve unit includes an inner sleeve defining the wearing space, the inner sleeve having a top opening end edge, the upper unit includes a sock body portion defining the internal space, a sleeve-on portion extending upward from the sock body portion, and an annular sewing portion extending downward from the sleeve-on portion, the sleeve-on portion being higher than the top opening end edge in the up-down direction and defining a sleeve-on shoe opening communicating with the wearing space, the annular sewing portion extending downward into the wearing space of the inner sleeve and being fixed to the inner surface of the inner sleeve, the bottom edge of the annular sewing portion being lower than the top opening end edge in the up-down direction, the first main sheet being fitted to the sock body portion, and the second main sheet being fitted to the sock body portion.

9. The moisture-permeable and waterproof shoe capable of preventing the upper from cracking according to claim 8, characterized in that: The upper unit is folded back to form the sleeve-on portion and the annular sewing portion.

10. The moisture-permeable and waterproof shoe capable of preventing the upper from cracking according to claim 8, characterized in that: The inner cover unit also includes a waterproof group. The inner cover is sewn from inner cover pieces. The inner cover pieces include a lining layer, a surface layer, a support layer arranged between the lining layer and the surface layer, and a moisture-permeable waterproof layer fixed to the outer surface of the surface layer. The waterproof group includes a plurality of waterproof strips, which are fixed to the outer surface of the inner cover to cover the seams of the inner cover.