backpack

Abstract

To eliminate stress and discomfort caused by the shoulder straps of a backpack falling off or shifting out of place. [Solution] A rucksack 1A according to one embodiment comprises a main body 10 with a back support surface 13, a right shoulder strap 21 arranged on one widthwise side of the back support surface 13, one end connected to the upper part of the main body 10 and the other end connected to the lower part of the main body 10, a left shoulder strap 22 arranged on the other widthwise side of the back support surface 13, one end connected to the upper part of the main body 10 and the other end connected to the lower part of the main body 10, and a connector 30 which is stretchable and has one end connected to the upper part of the right shoulder strap 21 and the other end connected to the upper part of the left shoulder strap 22. When in use, the connector 30 is placed closer to the back than the user's neck.

Description

[Technical Field]

[0001] The present invention relates to a backpack. [Background technology]

[0002] Today, many people use backpacks for various purposes, such as commuting to work or school, shopping, etc. A typical backpack has a main body and a pair of shoulder straps. The main body is formed in a bag-like shape and has an internal space capable of accommodating items. One end of each shoulder strap is connected to the upper part of the main body, and the other end of each shoulder strap is connected to the lower part of the main body.

[0003] A backpack user typically wears the backpack with one shoulder strap over their right shoulder and the other over their left shoulder. However, the shoulder straps can slip off the user's shoulders while wearing the backpack. This is especially true if the backpack's shape and dimensions do not match the user's body shape.

[0004] Some conventional backpacks are equipped with a chest strap that maintains the distance between a pair of shoulder straps. For example, Patent Document 1 discloses a backpack equipped with a chest strap (called a "chest strap" in Patent Document 1) whose length is adjustable to maintain the distance between a pair of shoulder straps. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2022-175069 A (paragraph 0070, Figure 6) Summary of the Invention [Problem to be solved by the invention]

[0006] The chest strap is composed of a strap whose base end is connected to one shoulder belt, a strap whose base end is connected to the other shoulder belt, and a buckle attached to the tip of each strap.

[0007] When using a chest strap, the ends of the two straps are connected together in front of the user's chest. Therefore, the ends of the chest straps must be disconnected every time the backpack is taken off. Also, the ends of the chest straps must be reconnected after the backpack is put back on.

[0008] Chest straps are an effective way to prevent shoulder straps from slipping off or shifting position, but they can be cumbersome to use, as described above, so chest straps are often not used.

[0009] The present invention has been made in consideration of the above-mentioned problems, and its purpose is to eliminate the stress and discomfort caused by the shoulder straps of a backpack falling off or shifting out of place. [Means for solving the problem]

[0010] A backpack according to one embodiment comprises a main body having an internal space capable of accommodating items and a back support surface that faces the user's back when in use, first shoulder straps arranged on one widthwise side of the back support surface and having one end connected to the upper part of the main body and the other end connected to the lower part of the main body, second shoulder straps arranged on the other widthwise side of the back support surface and having one end connected to the upper part of the main body and the other end connected to the lower part of the main body, and a flexible connector having one end connected to the upper part of the first shoulder strap and the other end connected to the upper part of the second shoulder strap, the connector being arranged closer to the back than the user's neck when in use. [Effects of the Invention]

[0011] This invention eliminates the stress and discomfort caused by the shoulder straps of a backpack falling off or shifting out of place. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a diagram showing the appearance of a backpack according to an embodiment. [Figure 2] FIG. 2 is an enlarged view of a portion of the backpack shown in FIG. 1. [Figure 3] FIG. 3 is a diagram schematically illustrating an upper portion of the shoulder belt shown in FIG. 2. [Figure 4] FIG. 2 is a diagram showing the backpack shown in FIG. 1 in use. [Figure 5] FIG. 10 is a diagram showing a state in which a backpack serving as a comparative example is used. [Figure 6] 10A and 10B are diagrams showing a modified example of the locking portion. DETAILED DESCRIPTION OF THE INVENTION

[0013] An example of an embodiment of the present invention will be described in detail below with reference to the drawings. In all drawings referred to for describing the embodiment, the same or substantially the same components and elements will be designated by the same reference numerals. Furthermore, as a general rule, components and elements that have already been described will not be described again.

[0014] <Backpack Overview> Fig. 1 is a diagram showing the appearance of a backpack 1A according to this embodiment, and Fig. 2 is a diagram showing an enlarged view of a part of the backpack 1A shown in Fig. 1.

[0015] The backpack 1A has a main body 10, a first shoulder strap 21, a second shoulder strap 22, and a connector 30. In the following description, the person carrying the backpack 1A may be referred to as the "user."

[0016] The first shoulder strap 21 is disposed on one widthwise side of the main body 10, and the second shoulder strap 22 is disposed on the other widthwise side of the main body 10. A user carries the backpack 1A by putting the first shoulder strap 21 on their right shoulder and the second shoulder strap 22 on their left shoulder. Therefore, in the following description, the first shoulder strap 21 may be referred to as the "right shoulder strap 21," and the second shoulder strap 22 may be referred to as the "left shoulder strap 22." Furthermore, the first shoulder strap 21 and the second shoulder strap 22 may be collectively referred to as the "shoulder belts 20."

[0017] <Main body> The main body 10 is formed into a bag shape from a flexible material. However, the main body 10 has enough shape retention to maintain the shape shown in Fig. 1. There are no particular restrictions on the material of the main body 10, but examples include nylon and polyester.

[0018] The main body 10 has an internal space capable of accommodating items. When the slider (not shown) of the fastener 11 is slid in a predetermined direction, the side of the main body 10 opens, allowing items to be placed in and removed from the internal space. An external pocket 12 suitable for storing items such as plastic bottles and water bottles is provided at the bottom of the side of the main body 10. The inside of the main body 10 also has at least one internal pocket.

[0019] The main body 10 has a back support surface 13 that faces the back of the user when the backpack 1A is in use. The back support surface 13 is a relatively flat surface of the main body 10 that comes into contact with the back of the user wearing the backpack 1A.

[0020] The back support surface 13 may be made of or covered with a mesh material to prevent stuffiness. Also, the back support surface 13 may have an uneven surface to reduce the contact area with the user's back.

[0021] <Shoulder strap> As described above, the right shoulder belt 21 is disposed on one widthwise side of the main body 10, and the left shoulder belt 22 is disposed on the other widthwise side of the main body 10. More specifically, the right shoulder belt 21 is disposed on one widthwise side of the backrest surface 13, and the left shoulder belt 22 is disposed on the other widthwise side of the backrest surface 13.

[0022] The shoulder belt 20 is composed of a shoulder pad 23, an adjustment strap 24, and a strap connector 25. The upper end of the shoulder pad 23 is connected to the upper part of the main body 10 (more specifically, to the upper end of the backrest surface 13 or its vicinity). The lower end of the adjustment strap 24 is connected to the lower part of the main body 10 (more specifically, to the lower end of the backrest surface 13 or its vicinity). The lower end of the shoulder pad 23 is connected to the adjustment strap 24 via the strap connector 25.

[0023] When the strap connector 25 is moved relative to the adjustment strap 24, the connection position between the shoulder rest portion 23 and the adjustment strap 24 is changed, and the overall length of the shoulder belt 20 increases or decreases.

[0024] Lengthening the shoulder belts 20 makes it easier to put on and take off the backpack 1A. On the other hand, shortening the shoulder belts 20 after putting on the backpack 1A allows the shoulder belts 20 to fit the body.

[0025] <Connector and locking part> The connector 30 is elastic. More specifically, the connector 30 is a rubber belt with a total length of approximately 10 cm in an unloaded state. A hook 31 is attached to one end of the connector 30, and a hook 32 is attached to the other end of the connector 30. The hooks 31 and 32 each have two locking claws 33 that are integrally molded with the other parts.

[0026] One end of the connector 30 is detachably connected to the upper part of the right shoulder belt 21, and the other end of the connector 30 is detachably connected to the upper part of the left shoulder belt 22. More specifically, the locking claw 33 of the hook 31 is locked to a locking portion 40 provided on the upper part of the right shoulder belt 21. Similarly, the locking claw 33 of the hook 32 is locked to a locking portion 40 provided on the upper part of the left shoulder belt 22.

[0027] Fig. 3 is a diagram schematically illustrating the upper part of the shoulder belt 20 shown in Fig. 2. A strip-shaped member (tape) 51 extending along the right shoulder belt 21 is sewn to the upper part of the right shoulder belt 21. Similarly, a strip-shaped member (tape) 52 extending along the left shoulder belt 22 is sewn to the upper part of the left shoulder belt 22.

[0028] There are no particular limitations on the material of the belt-shaped members 51, 52, but nylon, polyester, etc. may be used, for example. From the viewpoint of creating a sense of unity with the shoulder belt 20, the same or similar material as the material of the surface of the shoulder pad portion 23 may be selected.

[0029] The belt-shaped members 51, 52 are sewn to the shoulder belt 20 at three or more different locations in the longitudinal direction. More specifically, the belt-shaped member 51 is sewn to the right shoulder belt 21 at a total of six locations, including two locations at both ends in the longitudinal direction. The belt-shaped member 52 is sewn to the left shoulder belt 22 at a total of six locations, including two locations at both ends in the longitudinal direction.

[0030] As a result, six stitches (seams n1 to n6) are present at approximately equal intervals along the longitudinal direction on each of the belt-shaped members 51, 52. From another perspective, each of the belt-shaped members 51, 52 is fixed to the shoulder belt 20 at only six different points along the longitudinal direction. Therefore, the area between two adjacent stitches is not fixed to the shoulder belt 20, and the locking claws 33 of the hooks 31, 32 can be caught in this area.

[0031] That is, in this embodiment, the area between two adjacent stitches on each of the belt-shaped members 51, 52 serves as a locking portion 40 capable of locking the hooks 31, 32. Furthermore, five locking portions 40 are provided on the belt-shaped members 51, 52 of this embodiment, which have six stitches.

[0032] More specifically, each of the belt-shaped members 51, 52 is provided with a locking portion 41 consisting of the area between the stitches n1 and n2, a locking portion 42 consisting of the area between the stitches n2 and n3, a locking portion 43 consisting of the area between the stitches n3 and n4, a locking portion 44 consisting of the area between the stitches n4 and n5, and a locking portion 45 consisting of the area between the stitches n5 and n6. However, the number of locking portions 40 can be increased or decreased as needed.

[0033] The locking claw 33 of the hook 31 shown in Figures 1 and 2 is hooked onto the locking portion 43 on the belt-shaped member 51 shown in Figure 3. Similarly, the locking claw 33 of the hook 32 shown in Figures 1 and 2 is hooked onto the locking portion 43 on the belt-shaped member 52 shown in Figure 3.

[0034] As described above, in this embodiment, a plurality of locking portions 40 (locking portions 41, 42, 43, 44, 45) are provided on the upper portion of the shoulder belt 20. This allows the attachment position of the connector 30 to the shoulder belt 20 to be changed. More specifically, the attachment position of the connector 30 to the shoulder belt 20 can be changed in five stages.

[0035] When the hooks 31, 32 are hooked onto the locking portion 41, the connector 30 is stretched to the maximum extent. At this time, the force (elastic restoring force / tensile force) with which the connector 30 pulls the right shoulder belt 21 and the left shoulder belt 22 together is at its maximum.

[0036] <Usage status> Fig. 4 is a diagram showing the state of use of rucksack 1A. Fig. 5 is a diagram showing the state of use of rucksack 1B as a comparative example. Rucksack 1B as the comparative example has the same configuration as rucksack 1A according to the present embodiment, except that it does not have connector 30 and locking portion 40.

[0037] 5, in the backpack 1B, the left shoulder belt 22 has slipped off the left shoulder of the user X. More specifically, the gap between the right shoulder belt 21 and the left shoulder belt 22 has widened, causing the left shoulder belt 22 to slip off the left shoulder of the user X.

[0038] If the distance between the right shoulder belt 21 and the left shoulder belt 22 increases, the right shoulder belt 21 may slip off the user X's right shoulder.

[0039] On the other hand, in the rucksack 1A according to the present embodiment, the upper portions of the right shoulder belt 21 and the left shoulder belt 22 are connected to each other by the connector 30. Therefore, the distance between the right shoulder belt 21 and the left shoulder belt 22 does not increase.

[0040] More specifically, when a force acts on one or both of the right shoulder belt 21 and the left shoulder belt 22 to separate them, the connector 30 exerts a force (elastic restoring force / tensile force) that resists that force, suppressing the movement of the right shoulder belt 21 or the left shoulder belt 22. As a result, as shown in Fig. 4, neither the right shoulder belt 21 nor the left shoulder belt 22 slips off the shoulder of the user X and is held in the correct position.

[0041] Furthermore, because the connector 30 is stretchable, it does not unnecessarily restrict the right shoulder belt 21 and the left shoulder belt 22. For example, when putting on or taking off the rucksack 1A, the connector 30 temporarily stretches, allowing the distance between the right shoulder belt 21 and the left shoulder belt 22 to be increased as needed.

[0042] Furthermore, the connector 30 is positioned closer to the back of the user X than the neck. More specifically, the connector 30 is positioned below the base of the user X's neck. Therefore, the rucksack 1A can be taken off without removing the connector 30. Furthermore, when the user X carrying the rucksack 1A is viewed from the front, the connector 30 is not visible, which provides a good appearance.

[0043] From the perspective of making the backpack 1A more comfortable to use, it is preferable to change the attachment position of the connector 30 relative to the shoulder belt 20 depending on the body shape, etc. of the user X. Also, changing the attachment position of the connector 30 relative to the shoulder belt 20 depending on the size, weight, etc. of the items stored in the main body 10 may lead to improved comfort.

[0044] The present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the spirit and scope of the present invention. For example, the hooks 31 and 32 attached to the connector 30 can be replaced with other known or new hooks. For example, the hooks 31 and 32 can be replaced with other hooks having one locking claw.

[0045] When the hooks 31, 32 are replaced with other hooks, it is preferable to also change the locking portion 40 as necessary. Fig. 6 is a diagram showing a modified example of the locking portion 40. The upper part of the right shoulder belt 21 shown in Fig. 6 is provided with a plurality of mutually independent locking portions 40 (locking portions 41, 42, 43, 44) arranged in a row along the longitudinal direction of the right shoulder belt 21 (shoulder pad portion 23).

[0046] Similarly, the upper portion of the left shoulder belt 22 shown in Figure 6 is provided with multiple, independent locking portions 40 (locking portions 41, 42, 43, 44) arranged in a row along the longitudinal direction of the left shoulder belt 22 (shoulder pad portion 23).

[0047] 6 can be engaged by inserting the engaging claws of a hook from above or below. However, the means for connecting the connector 30 to the shoulder belt 20 is not limited to hooks, and may also be hook-and-loop fasteners, buttons, etc.

[0048] It is preferable that the connector 30 is detachable from the shoulder belt 20. It is also preferable that the attachment position of the connector 30 relative to the shoulder belt 20 is changeable. However, even when the connector 30 is fixed to the shoulder belt 20 or when the attachment position of the connector 30 relative to the shoulder belt 20 cannot be changed, it is possible to prevent the shoulder belt 20 from falling off or shifting out of position. [Explanation of symbols]

[0049] 1A, 1B... Backpack 10...Main body 11...Zipper 12...External pocket 13...Back support surface 20...Shoulder belt 21...First shoulder strap (right shoulder strap) 22...Second shoulder strap (left shoulder strap) 23...Shoulder rest 24…Adjustment strap 25...Strap connector 30...Connector 31, 32…Hook 33...Latching claw 40, 41, 42, 43, 44, 45...Latching parts 51, 52...Belt-shaped members n1, n2,, n3, n4, n5, n6...stitches X…User

Claims

1. a main body portion having an internal space capable of accommodating items and a back support surface that faces the back of a user when in use; a first shoulder belt disposed on one side of the backrest in the width direction, one end of which is connected to the upper part of the main body and the other end of which is connected to the lower part of the main body; a second shoulder belt disposed on the other widthwise side of the back support surface, one end of which is connected to the upper portion of the main body and the other end of which is connected to the lower portion of the main body; a connector having elasticity, one end of which is connected to an upper portion of the first shoulder strap and the other end of which is connected to an upper portion of the second shoulder strap; The backpack is such that the connector is positioned closer to the back of the user than the neck when in use.

2. The backpack according to claim 1, The backpack, wherein the connector is positioned below the base of the user's neck when in use.

3. The backpack according to claim 1, The backpack, wherein the connector is a rubber belt.

4. The backpack according to claim 1, A backpack, wherein one end of the connector is detachably connected to an upper portion of the first shoulder strap, and the other end of the connector is detachably connected to an upper portion of the second shoulder strap.

5. The backpack according to claim 4, a hook provided at each of the one end and the other end of the connector; a plurality of fastening portions provided on the upper portions of the first shoulder strap and the second shoulder strap, respectively, to which the hooks are fastened.

6. The backpack according to claim 5, a belt-shaped member sewn to the first shoulder belt at three or more different points in the longitudinal direction; a belt-shaped member sewn to the second shoulder belt at three or more different points in the longitudinal direction, A backpack in which the region between two adjacent seams in each of the belt-shaped members is the fastening portion.

7. The backpack according to claim 5, a plurality of the locking portions that are independent of each other and are arranged in a line along the longitudinal direction of the first shoulder belt on an upper portion of the first shoulder belt; A backpack having a plurality of the locking portions, which are independent of each other, arranged in a row along the longitudinal direction of the second shoulder strap at an upper portion of the second shoulder strap.

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