bag

Abstract

To provide a bag which is excellent in waterproofness and prevents deformation by sewing after bonding chloroprene rubber with an adhesive. [Solution] The bag 1 is formed by gluing chloroprene rubber as a fabric and sewing it, and includes a bag-shaped main body 2 and a front part 3, a back part 4, a right side part 5, a left side part 6, a flat part 7, and a bottom part 8 that constitute the main body 2. A back pocket is provided in the back part 4, an inner back pocket is provided in the inner back part, a front pocket 32 ​​is provided in the front part 3, an inner front pocket is provided in the inner front part, and a left side pocket 34 is provided in the left side part 6. The inner back pocket is further provided with an inner back auxiliary pocket. Each pocket has a pocket cover that forms the pocket, and the pocket cover and the back part 4 and the front part 3 increase the thickness to prevent the main body 2 from losing its shape.

Description

[Technical field]

[0001] This invention relates to a backpack-type bag that is worn on the back, and in particular to a bag that is highly waterproof and can stand on its own (does not easily lose its shape) even when there are no items inside. [Background technology]

[0002] Waterproof bags have been proposed for some time. For example, Patent Document 1 discloses a backpack that is equipped with a dedicated lightweight waterproof cover that can be used reliably even in unexpected rain and is structured so that the waterproof cover does not easily come off the backpack body when in use. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Utility Model Registration No. 3126226 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the rucksack described in Patent Document 1 improves its waterproofness by using an attached waterproof cover, which has the problem of being time-consuming to put the waterproof cover on the rucksack every time.

[0005] Furthermore, backpacks made of soft materials have the problem that they are prone to losing their shape unless they are made with a shape-retaining material or the like.

[0006] In view of the above circumstances, the present invention aims to provide a bag that is made by gluing chloroprene rubber with an adhesive and then sewing it, which has excellent waterproof properties and can prevent the bag from losing its shape without using shape-retaining materials. [Means for solving the problem]

[0007] The inventor of the present invention has conducted intensive research and development into the above-mentioned problems, and as a result has discovered the following revolutionary bag.

[0008] In a first aspect of the present invention for solving the above problems, a bag such as a backpack to be worn on the back using a shoulder strap is formed by gluing chloroprene rubber with an adhesive and then sewing, and includes a bag-shaped main body, a back pocket protruding outward from the back part of the main body, a back pocket cover forming the back pocket and provided to cover the back part, an inner back pocket protruding inward from the inner back part of the main body on an inner back part of the main body corresponding to the back part, an inner back pocket cover forming the inner back pocket and provided to cover the inner back part, a front pocket protruding into the main body on a front part of the main body, and an inner front pocket forming the front pocket and provided to cover the inner back part of the main body The bag comprises a front pocket cover provided on the front portion, a waterproof front pocket fastener provided on the front portion from the left side portion toward the right side portion of the main body, an inner front pocket protruding from the inner front portion toward the inside of the main body on the inner front portion, an inner front pocket cover provided to form the inner front pocket and cover the inner front portion, an inner back auxiliary pocket further protruding from the inner back pocket toward the inside of the main body, and an inner back auxiliary pocket cover provided to form the inner back auxiliary pocket and cover the inner back pocket cover, each pocket cover rising from near the bottom portion of the main body toward the flat portion of the main body.

[0009] In the first aspect, a plurality of pockets are provided on the front and back of the main body, and the pocket covers that form the pockets thicken the front and back sides to make them easier to stand up, reinforcing the flexibility of the chloroprene rubber and preventing the main body from losing its shape. A bag that stands up when no items are stored in the main body can be provided, making it easy to carry and place. In addition, items can be taken in and out of the bag in the upright state, ensuring convenience during use. Furthermore, by utilizing the flexibility, waterproofness, and strength of chloroprene rubber, a bag can be provided that fits better to the body, can be used safely even in the rain, and is less damaged when subjected to external impacts.

[0010] A second aspect of the present invention is the bag according to the first aspect, characterized in that the thickness of the chloroprene rubber is 3 mm to 6 mm.

[0011] In the second aspect, it is possible to provide chloroprene rubber having a thickness that allows easy processing and sewing.

[0012] A third aspect of the present invention is a bag as described in the first or second aspect, characterized in that the rear pocket has a waterproof rear pocket zipper that runs from near the bottom portion toward the flat portion of the main body.

[0013] In the third aspect, the rear side can be further strengthened, and deformation of the rear side can be further prevented.

[0014] A fourth aspect of the present invention is the bag according to the first aspect, characterized in that the front portion of the body is provided with a bent portion that slopes toward the flat portion of the body, and the width of the flat portion is made smaller than the width of the bottom portion.

[0015] In the fourth aspect, the weight of the planar portion is reduced compared to the bottom portion, making it possible to provide a bag that does not easily lose its shape.

[0016] A fifth aspect of the present invention is a bag as described in the first aspect, characterized in that at least one of the right side or left side of the main body has a side pocket extending from near the bottom portion toward the flat portion, and at least the other has a waterproof side zipper extending from near the bottom portion toward the flat portion.

[0017] In the fifth aspect, both sides are strengthened and the shape of both sides is prevented from being distorted. In particular, when the main body fastener is opened and the front part is folded forward to put in and take out items from the main body, the back part and both sides have a synergistic effect to prevent the shape from being distorted.

[0018] A sixth aspect of the present invention is the bag according to the fourth aspect, characterized in that the ratio of the height of the bent portion to the height of the main body is 1:2 to 3:4.

[0019] In the sixth aspect, if the ratio is less than 1:2, the storage capacity will be small, and if the ratio is more than 3:4, the bag will approach a rectangular shape and will be difficult to maintain its shape. However, if the ratio is in the range of 1:2 to 3:4, a bag can be provided that can easily maintain its shape while ensuring storage capacity.

[0020] A seventh aspect of the present invention is the bag according to the fourth aspect, characterized in that the inclination angle between the rising direction of the front portion and the bent portion is 50° to 70°.

[0021] In the seventh aspect, if the inclination angle is less than 50°, the storage capacity will be small, and if it is more than 70°, the bag will approach a rectangular shape and will be difficult to maintain its shape. However, if the inclination angle is in the range of 50° to 70°, a bag can be provided that can easily maintain its shape while ensuring storage capacity.

[0022] An eighth aspect of the present invention is the bag according to the first aspect, further comprising a hanging belt provided above the flat portion, a pair of shoulder belts protruding outward from the back portion, an adjustment belt connected to the shoulder belts, and a waterproof main body zipper provided at the boundary of the front portion.

[0023] In the eighth aspect, the necessary functions as a bag can be provided.

[0024] A ninth aspect of the present invention is the bag according to the first aspect, characterized in that the main body, pocket and zipper are attached by sewing after being bonded with adhesive, and at least a part of the sewing is a blind stitch.

[0025] According to the ninth aspect, a bag can be provided that is bonded with an adhesive and securely sewn. [Brief description of the drawings]

[0026] [Figure 1] 1 is a front perspective view showing an example of a bag according to the present invention. FIG. [Diagram 2] FIG. 2 is a rear perspective view of FIG. [Diagram 3] FIG. 2 is a front view of FIG. [Figure 4] FIG. 2 is a rear view of FIG. [Diagram 5] FIG. 2 is a right side view of FIG. [Figure 6] FIG. 1 is a left side view. [Figure 7] FIG. 2 is a bottom view of FIG. [Figure 8] 2 is a perspective view showing the inner surface of the main body in FIG. 1 with the main body fastener open. FIG. [Figure 9] 2 is a schematic cross-sectional view showing the positional relationship of pockets in FIG. 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a bag according to the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited to the following embodiment.

[0028] (Embodiment 1) The bag 1 of this embodiment is formed by using chloroprene rubber (neoprene rubber) as the fabric, bonding the pieces with an adhesive, and then sewing (e.g., by blind stitching). As shown in Figures 1 and 2, the bag-shaped main body 2 comprises a front portion 3, a back portion 4, a right side portion 5, a left side portion 6, a flat portion 7, and a bottom portion 8 which constitute the main body 2. Inside the main body 2, as shown in Figure 8, there is an inner front portion 10 which corresponds to the front portion 3, and an inner back portion 11 which corresponds to the back portion 4.

[0029] The bag 1 further includes a hanging belt 20 provided above the flat portion 7 to enable the bag 1 to be held by hand, a shoulder belt 21 provided protruding from the back portion 4 to enable the bag 1 to be carried on the shoulder, and a main body zipper 22. The main body zipper 22 is waterproof and provided at the boundaries between the front portion 3 and both side portions 5, 6 and the flat portion 7, and by opening and closing the main body zipper 22, items (luggage) to be carried can be put in and taken out of the main body 2. As with other waterproof fasteners described below, examples of the main body zipper 22 include commercially available waterproof fasteners, and although the waterproofness will be inferior, a zipper that is not completely waterproof can be used.

[0030] 1, both ends of the main body zipper 22 are located closer to the bottom surface 8 than the center, and are bonded to the main body 2 with an adhesive and then sewn in place at locations extending from the boundary between the front surface 3 and the right side surface 5, through the boundary between the front surface 3 and the flat surface 7, to the boundary between the front surface 3 and the left side surface 6. By opening the main body zipper 22, the front surface 3 can be largely expanded, making it easy to put items in and take them out of the main body 2.

[0031] The hanging belt 20 is used when the bag 1 is held by hand, and both ends are adhered with an adhesive to the vicinity of the flat surface 7 of the right side surface 5 and the vicinity of the flat surface 7 of the left side surface 6, respectively, and then fixed by sewing, and has a predetermined width, is located above the flat surface 7, and is attached so as to straddle the flat surface 7. The hanging belt 20 may be a hanging cord.

[0032] 2, one end of the pair of shoulder belts 21 is fixed near the flat portion 7 of the back portion 4 by sewing after being adhered with an adhesive, and the other end is connected to one end of a pair of adjustment belts 21a that are adhered with an adhesive and then fixed by sewing to the bottom portion 8, so that the length can be adjusted. The shoulder belts 21 and the adjustment belts 21a may be connected by a snap fit.

[0033] The front part 3, back part 4, right side part 5, left side part 6, flat part 7 and bottom part 8 constituting the main body 2 of the bag 1 are arranged substantially perpendicular to each other, and the main body 2 has a rectangular parallelepiped shape. As shown in FIG. 1, the main body 2 is slightly elongated with a height H longer than its length L, and the bottom part 8 has a rectangular shape with a width (depth) W shorter than its length L, and the width W1 of the flat part 7 is shorter than the width W near the bottom part 8. In other words, the main body 2 has a bent part 12 that is inclined from the flat part 7 toward the bottom part 8 so as to protrude toward the front part 3, and maintains a constant width W from the lower end of the bent part 12 toward the bottom part 8.

[0034] The bag 1 of this embodiment is a rucksack type, and a plurality of pockets are provided by adhering to the main body 2 with an adhesive and then sewing. As shown in Figures 3, 4, 6 and 8, a back pocket 30 is provided on the back portion 4, an inner back pocket 31 is provided on the inner back portion 11, a front pocket 32 ​​is provided on the front portion 3, an inner front pocket 33 is provided on the inner front portion 10, and a left side pocket 34 is provided on the left side portion 6. The inner back pocket 31 is further provided with an inner back auxiliary pocket 35.

[0035] As shown in FIG. 4, the back pocket 30 is a large pocket that covers the back part 4, protruding slightly outward from the back part 4, and is provided with a back pocket cover 30a that is provided from the vicinity of the bottom part 8 toward the flat part 7 and largely covers the back part 4, and a waterproof back pocket fastener 30b that opens and closes the back pocket cover 30a. The back pocket fastener 30b is provided large in the vertical direction from the vicinity of the flat part 7 to the vicinity of the bottom part 8, and can be opened and closed to put in and take out items from the back pocket 30. The back pocket cover 30a is formed of a mesh fabric that is glued to the back part 4 and then sewn. For example, by storing an ice pack in the back pocket 30 in summer, the back can be cooled, and by storing a hand warmer in winter, the back can be warmed. The back pocket cover 30a is elastic and fits well to the back, but cushioning material may be stored in the back pocket 30 to further improve the fit.

[0036] The front pocket 32 ​​is provided with a front pocket cover 32a that protrudes from the front portion 3 toward the inside of the main body 2 as shown in Fig. 9, and a waterproof front pocket zipper 32b that is large in the horizontal direction from the vicinity of the left side portion 6 to the vicinity of the right side portion 5 as shown in Fig. 3. The front pocket cover 32a is adhered to the inner front portion 10 with an adhesive from the vicinity of the bottom portion 8 toward the flat portion 7 so as to cover the inner front portion 10, and then sewn to fix it, and the front pocket zipper 32b is adhered to the front portion 3 with an adhesive and then sewn to fix it. Items can be inserted and removed from the front pocket 32 ​​from the outside of the bag 1 by opening and closing the front pocket zipper 32b.

[0037] As shown in Figures 9 and 6, the inner back pocket 31, the inner front pocket 33, the left side pocket 34 and the inner back supplementary pocket 35 are each provided with an inner back pocket cover 31a, an inner front pocket cover 33a, a left side pocket cover 34a and an inner back auxiliary pocket cover 35a, and the pocket covers 31a, 33a, 34a and 35a are adhered with an adhesive and then sewn in place to form each of the pockets 31, 33, 34 and 35.

[0038] The pocket covers 31a, 33a, 34a, and 35a are each provided from the vicinity of the bottom surface portion 8 toward the flat surface portion 7. The inner back pocket cover 31a is provided so as to cover the inner back surface portion 11, the inner front pocket cover 33a is provided so as to cover the front pocket cover 32a and the inner front surface portion 10, the left side pocket cover 34a is provided so as to cover the left side surface portion 6, and the inner back auxiliary pocket cover 35a is provided so as to cover the inner back pocket cover 31a and the inner back surface portion 11.

[0039] 9, the inner back pocket cover 31a protrudes into the main body 2, and the inner back auxiliary pocket cover 35a protrudes further into the main body 2. The inner back pocket cover 31a is adhered to the inner back portion 11 with an adhesive and then sewn, and the inner back auxiliary pocket cover 35a is adhered to the inner back portion 11 with an adhesive via the inner back pocket cover 31a and then sewn.

[0040] In addition, the inner front pocket cover 33a protrudes further into the main body 2 than the front pocket cover 32a, and the inner front pocket cover 33a is further provided with a waterproof inner front pocket zipper 33b, as shown in Figure 8. By opening and closing this inner front pocket zipper 33b, items can be inserted and removed from the inner front pocket 33 from inside the main body 1.

[0041] The inner back pocket 31, inner front pocket 33 and inner back supplement pocket 35 can store laptop computers, tablets, notebooks, thin accessories, etc. Since they are made of chloroprene rubber, they are stretchable and can be inflated to store items.

[0042] In addition, a plastic bottle, a water bottle, etc. can be stored in the left side pocket 34. Furthermore, a water drain hole 34b that connects the inside of the main body 2 to the outside may be provided near the bottom surface 8 of the left side pocket 34. The water drain hole 34b may be formed of a mesh material.

[0043] 5, a waterproof right side fastener 5a is attached to the right side surface portion 5 by adhesive and then sewing, and by opening and closing it, items can be put in and taken out from the right side surface portion 5 into the main body 2. The right side fastener 5a is provided from the vicinity of the bottom surface portion 8 toward the flat surface portion 7.

[0044] Although it has been explained that the left side pocket 34 is located on the left side portion 6 and the right side zipper 5a is located on the right side portion 5, the terms "left side" and "right side" are used to make the explanation easier to understand, and the left side pocket 34 may be located on the right side portion 5 and the right side zipper 5a may be located on the left side portion 6.

[0045] Next, the positional relationship of each component will be described with reference to the drawings. 1 is a perspective view seen from above the flat portion 7 toward the front portion 3 from the left side portion 6. Shown are a front pocket 32 ​​having a front pocket fastener 32b on the front portion 3, a main body fastener 22 provided at the boundary of the front portion 3, a bent portion 12 inclined toward the flat portion 7, a hanging belt 20 protruding from the upper portion of the flat portion 7, a left side pocket 34 on the left side portion 6, and a drainage hole 34b.

[0046] 2 shows a pair of shoulder belts 21 and an adjustment belt 21b, a back pocket 30, a back pocket cover 30a and a back pocket fastener 30b provided on the back portion 4, and a right side fastener 5a on the right side portion 5. FIG.

[0047] Figure 3 shows the front pocket 32 ​​and front pocket zipper 32b, Figure 4 shows the back pocket 30, back pocket cover 30a, back pocket zipper 30b, shoulder belt 21 and adjustment belt 21b, Figure 5 shows the right side zipper 5a, Figure 6 shows the left side pocket 34 and drainage hole 34b, and Figure 7 shows the adjustment belt 21a.

[0048] 8 shows pockets inside the main body 2. The inner front pocket 33, the inner front pocket cover 33a, and the inner front pocket fastener 33b are shown on the inner front part 10, while the inner back pocket 31, the inner back pocket cover 31a, the inner back auxiliary pocket 35, and the inner back auxiliary pocket cover 35a are shown on the inner back part 11.

[0049] In Figure 9, the back pocket 30, the inner back pocket 31, the front pocket 32, the inner front pocket 33, the inner back pocket 34, the inner back auxiliary pocket 35, the back pocket cover 30a, the inner back pocket cover 31a, the front pocket cover 32a, the inner front pocket cover 33a, the inner back pocket cover 34a, and the inner back auxiliary pocket cover 35a are each shown in cross section.

[0050] Chloroprene rubber (neoprene rubber), which is the fabric of the bag 1, generally has high elasticity like natural rubber, and also has excellent mechanical strength, oil resistance, and flammability, and is therefore often used in industrial products that are subject to severe loads, as well as in packing and O-rings, and is also excellent in waterproofness, moisture retention, stretchability, and the like, and is also used in diver's suits. The bag of this embodiment particularly takes advantage of its waterproofness. The fabric of a wetsuit is made by incorporating air bubbles into chloroprene rubber and covering the surface with nylon or rubber material, and the same is true for the bag 1 of this embodiment.

[0051] As shown in Patent Document 1, waterproof bags are generally made by gluing together fabrics such as nylon or polyester with an adhesive and then sewing them together, but the bag 1 of this embodiment uses chloroprene rubber, which combines more reliable waterproofing with strength and workability. Chloroprene rubber is flexible to shapes, as is used in wetsuits, so even if the bag is formed into a shape, it will lose its shape unless items are stored inside the main body.

[0052] In this embodiment, a back pocket 30 is provided on the back portion 4, an inner back pocket 31 and an inner back supplement pocket 35 are provided on the inner back portion 11, an inner front pocket 33 on the inner front portion 10, and a front pocket 32 ​​on the front portion 3. This increases the thickness of the back portion 4 and the front portion 3 of the main body 2, prevents deformation of the main body 2, and reduces deformation of the bag 1 even when no items are stored in the main body 2.

[0053] The bag 1 is sewn after bonding chloroprene rubber having a thickness of 3 mm to 6 mm with an adhesive, and the pocket covers constituting the pockets have a similar thickness. For example, the thickness of the back pocket cover 30a is added to the back portion 4, and the thickness of the inner back pocket cover 31a and the inner back auxiliary pocket cover 35a is added to the inner back portion 11. In other words, the thickness of the back portion 4 is four times that of the pocket covers having the same thickness. This allows the back portion 4 to stand upright perpendicular to the bottom portion 8, and prevents the back portion 4 from losing its shape.

[0054] If chloroprene rubber with a thickness of less than 3 mm is used, the bag 1 will lose its shape if no items are stored inside the main body 2. On the other hand, if chloroprene rubber with a thickness of more than 6 mm is used, the bag 1 will easily lose its shape due to its own weight.

[0055] Deformation is further prevented by the rear pocket zipper 30b on the rear pocket 30. Even if no articles are stored inside the main body 1, the bag 1 can stand on its own while retaining its shape with little deformation.

[0056] Furthermore, by forming the back pocket 30, the inner back pocket 31, the inner back auxiliary pocket 35, the inner front pocket and the front pocket 32 ​​from near the bottom portion 8 toward the flat portion 7, the area near the bottom portion 8 is strengthened, further preventing the bag 1 from losing its shape.

[0057] By making the width W1 of the flat portion 7 shorter than the width W of the bottom portion 8, the flat portion 7 is made lighter than the bottom portion 8, thereby preventing the bag 1 from losing its shape. For example, it is desirable to set the ratio of the height H1 of the bent portion 12 to the height H of the main body 2 to 1:2 to 3:4. This makes it easier to maintain the shape of the main body 2 while ensuring the storage capacity. If the ratio is smaller than 1:2, the storage capacity will be reduced, and if the ratio is larger than 3:4, the shape will become closer to a rectangular parallelepiped and it will be difficult to maintain the shape. In addition, the inclination angle θ of the bent portion 12 shown in FIG. 1 is also important. It is desirable that the inclination angle θ with respect to the standing direction of the front portion 3 is 50° to 70°. If it is smaller than 50°, the storage capacity will be reduced, and if it is larger than 70°, the shape will become closer to a rectangular parallelepiped and it will be difficult to maintain the shape.

[0058] Opening the main body zipper 22 makes it easy to put items in and take items out of the main body 2, but opening only the back portion 4 tends to cause the bag to lose its shape. In the bag 1 of this embodiment, the right side zipper 5a on the right side portion 5 and the left side pocket 34 on the left side portion 6 further prevent the side portions 5, 6 from losing their shape. This makes it possible to put items in and take them out while preventing the main body 2 from losing its shape.

[0059] As described above, while taking advantage of the characteristics of chloroprene rubber such as waterproofness, processability, and strength, weak points that make it prone to deformation are reinforced with multiple pockets, thereby providing a bag 1 that is easy to use, preventing the shape from losing its shape while ensuring sufficient storage capacity.

[0060] (Other embodiments) Although the bag in the first embodiment is entirely sewn with a blind stitch, the present invention is not limited to this. It goes without saying that some of the stitching may be sewn with a blind stitch and the other parts may be sewn with a normal stitch.

[0061] The present invention is not limited to the above-described embodiment, and can be modified, improved, etc. as appropriate. In addition, the material, shape, size, numerical value, form, number, arrangement location, etc. of each component in the above-described embodiment are arbitrary as long as they can achieve the present invention, and are not limited. [Explanation of symbols]

[0062] 1 bag 2 Main unit 3 Front section 4 Back part 5 Right side part 5a Right side zipper 6 Left side part 7 Plane part 8 Bottom part 10 Inner front part 11 Inner back part 12 Bend 20 Belt 21 Shoulder belt 21a, 21b Adjustment belt 22 Main body zipper 30 Back pocket 30a Back pocket cover 30b Back pocket zipper 31 Inner back pocket 31a Inner back pocket cover 32 Front pocket 32a Front pocket cover 32b Front pocket zipper 33 Inner front pocket 33a Inner front pocket cover 33b Inner front pocket with zipper 34 Left side pocket 34a Left pocket cover 34b Drain hole 35 Inner back auxiliary pocket 35a Inner rear auxiliary pocket cover

Claims

1. A bag such as a backpack that is carried on the back using a shoulder strap, It is made by gluing chloroprene rubber together and sewing it together. A bag-shaped body, A rear pocket protruding outward from a rear portion of the main body; A rear pocket cover that forms a rear pocket and is provided to cover the rear portion; an inner back pocket protruding from the inner back portion toward the inside of the main body on an inner back portion of the main body corresponding to the back portion; An inner back pocket cover that forms the inner back pocket and is provided to cover the inner back portion; A front pocket on a front portion of the main body and protruding into the main body; a front pocket cover provided on an inner front portion of the main body that forms the front pocket and corresponds to the front portion of the main body; A waterproof front pocket fastener is provided on the front portion from the left side portion to the right side portion of the main body; an inner front pocket on the inner front portion protruding from the inner front portion toward the inside of the main body; An inner front pocket cover that forms the inner front pocket and is provided to cover the inner front portion; An inner back auxiliary pocket that protrudes further inwardly from the inner back pocket of the main body; An inner rear auxiliary pocket cover that forms the inner rear auxiliary pocket and is provided to cover the inner rear pocket cover, The rear pocket cover, the inner rear pocket cover, the front pocket cover, the inner front pocket cover and the inner rear auxiliary pocket cover each rise from near the bottom surface of the main body toward the flat surface of the main body. bag.

2. The thickness of the chloroprene rubber is 3 mm to 6 mm.

2. The bag of claim 1.

3. The back pocket has a waterproof back pocket fastener provided from the vicinity of the bottom surface toward the flat surface of the main body.

3. The bag according to claim 1 or 2.

4. The front portion of the body is provided with a bent portion inclined toward a flat portion of the body, and the width of the flat portion is smaller than the width of the bottom portion.

2. The bag of claim 1.

5. At least one of the right side surface and the left side surface of the main body is provided with a side pocket extending from the vicinity of the bottom surface toward the flat surface, and at least the other is provided with a waterproof side fastener extending from the vicinity of the bottom surface toward the flat surface.

2. The bag of claim 1.

6. The ratio of the height of the bent portion to the height of the main body is 1:2 to 3:

4.

5. The bag of claim 4.

7. The inclination angle between the upright direction of the front portion and the bent portion is 50° to 70°.

5. The bag of claim 4.

8. A suspension belt provided above the planar portion; A pair of shoulder belts protruding outward from the back portion; an adjustment belt connected to the shoulder belt; A waterproof main body fastener is provided at the boundary of the front portion, 2. The bag of claim 1.

9. The main body, the pocket and the fastener are attached by sewing after being bonded with an adhesive, and at least a part of the sewing is a blind stitch.

2. The bag of claim 1.

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