Shoulder belt attachment device and backpack

Abstract

To provide a backpack belt attachment tool which enables a backpack bag to be easily stored in a narrow space, and a backpack bag equipped with the same. [Solution] The backpack belt attachment device 4 comprises a main body 4a that can be attached to the backrest 1a of the backpack bag 100, and a pair of connectors 4b that can connect the upper ends of a pair of backpack belts 3 and are rotatably attached to the main body 4a. Each of the pair of connectors 4b is configured to be rotatable between a first state in which it is rotated upward relative to the main body 4a and a second state in which it is rotated downward by rotating in opposite directions along the backrest 1a, and is configured to be engageable with the main body 4a in the first and second states.

Description

[Technical field]

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

[0002] Conventionally, in a school bag, a pair of shoulder straps are fixed to a storage section. For example, in the school bag described in JP 2015-181551 A (Patent Document 1), the pair of shoulder straps are fixed to the storage section so as to stand up from the storage section. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2015-181551 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the school bag described in the above publication, the pair of shoulder straps are fixed to the storage section so that they rise up from the storage section. Therefore, the pair of shoulder straps bulge in the depth direction (front-to-back direction) of the backpack, making it difficult to reduce the space required for the pair of shoulder straps. This makes it difficult to store the school bag in a small space such as a locker.

[0005] The present invention has been made in consideration of the above problems, and its object is to provide a backpack belt attachment device that makes it easy to store a backpack in a narrow space, and a backpack equipped with the same. [Means for solving the problem]

[0006] The backpack belt attachment device of the present invention is a backpack belt attachment device for attaching a pair of backpack belts to the back rest of a backpack bag. The backpack belt attachment device includes a main body portion that can be attached to the back rest of the backpack bag, and a pair of connectors that can connect the upper ends of the pair of backpack belts and are rotatably attached to the main body portion. Each of the pair of connectors is configured to be rotatable between a first state in which it is rotated upward relative to the main body portion and a second state in which it is rotated downward by rotating in opposite directions along the back rest, and is configured to be engageable with the main body portion in the first state and the second state. Effect of the Invention

[0007] The backpack belt attachment of the present invention makes it easier to store a backpack in a small space. [Brief description of the drawings]

[0008] [Figure 1] FIG. 2 is a schematic rear view of the backpack in the first embodiment. [Diagram 2] 1 is a schematic side view of a backpack in accordance with a first embodiment. [Diagram 3] 1 is a schematic rear view showing a state in which each of a pair of connectors of the backpack belt attachment device of the backpack bag in the first embodiment has been rotated downward relative to the main body. FIG. [Figure 4] 1 is a schematic perspective view showing a state in which each of a pair of connectors of the backpack belt attachment device of the backpack bag in the first embodiment is rotated downward relative to the main body. FIG. [Diagram 5] 1 is a schematic perspective view showing a state in which each of a pair of connecting bodies of the backpack belt attachment device of the backpack bag in the first embodiment has rotated downward relative to the main body, and the daruma ring has also rotated. FIG. [Figure 6] 1 is a schematic front view showing a state in which each of a pair of connectors of the backpack belt attachment device in the first embodiment is rotated upward relative to the main body. FIG. [Figure 7]FIG. 2 is a schematic front view showing a state in which each of a pair of connecting bodies of the backpack belt attachment device in the first embodiment has been rotated midway between the upper and lower sides relative to the main body. [Figure 8] 4 is a schematic front view showing a state in which each of a pair of connecting bodies of the backpack belt attachment device in the first embodiment is rotated downward relative to the main body. FIG. [Figure 9] 4 is a schematic internal structure diagram showing a state in which each of a pair of connecting bodies of the backpack belt attachment device in the first embodiment is rotated upward relative to the main body. FIG. [Figure 10] FIG. 7 is a schematic cross-sectional view taken along line XX in FIG. 6. [Figure 11] 1 is a schematic internal structural diagram showing a state in which each of a pair of connecting bodies of the backpack belt attachment device in the first embodiment is rotated midway between the upper and lower sides relative to the main body. FIG. [Figure 12] FIG. 8 is a schematic cross-sectional view taken along line XII-XII in FIG. [Figure 13] 4 is a schematic internal structure diagram showing a state in which each of a pair of connecting bodies of the backpack belt attachment device in the first embodiment is rotated downward relative to the main body. FIG. [Figure 14] FIG. 9 is a schematic cross-sectional view taken along line XIV-XIV in FIG. 8. [Figure 15] FIG. 11 is a schematic rear view of the backpack in the second embodiment. [Figure 16] FIG. 11 is a schematic side view of a backpack in a second embodiment. [Figure 17] FIG. 11 is a schematic rear view showing a state in which each of a pair of connectors of a backpack belt attachment device for a backpack bag in a second embodiment has been rotated downward relative to the main body. [Figure 18] FIG. 11 is a schematic side view showing a state in which each of a pair of connectors of a backpack belt attachment device for a backpack bag in a second embodiment has been rotated downward relative to the main body. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment will be described with reference to the drawings. In the following, the same or corresponding parts are denoted by the same reference characters, and overlapping descriptions will not be repeated.

[0010] (Embodiment 1) Bag 100 in the first embodiment can be applied to various types of bags such as a school bag, a rucksack, etc. In the first embodiment, bag 100 is, as an example, a school bag.

[0011] The configuration of backpack 100 in the first embodiment will be described with reference to Figs. 1 to 5.

[0012] 1 and 2, backpack bag 100 in embodiment 1 includes a storage section 1, a lid section 2, a pair of shoulder straps 3, a shoulder strap attachment device 4, a connecting member 5, a secondary storage section 6, and a pocket section 7. Note that in order to make shoulder straps 3 easier to see, FIG. 2 does not show one shoulder strap 31, but shows the other shoulder strap 32.

[0013] The storage section 1 has a backrest section 1a, a bottom section 1b, a front section 1c, and a pair of side sections 1d. A pair of shoulder belts 3 are attached to the backrest section 1a by shoulder belt attachment devices 4. The backrest section 1a is the section that faces the back of the user when the user carries the backpack 100 on his / her back. The bottom section 1b is the section that constitutes the bottom of the storage section 1. The front section 1c is the section that faces the backrest section 1a. The pair of side sections 1d are sections that are located on both the left and right sides of the backrest section 1a and the front section 1c.

[0014] The storage unit 1 has an opening at its upper end. The storage unit 1 has an internal space that communicates with the opening. The internal space is a space surrounded by the inner peripheral surfaces of the backrest 1a, the bottom 1b, the front 1c, and the pair of side sections 1d. The storage unit 1 is configured so that textbooks and the like can be stored in the internal space through the opening. The lid 2 is connected to the upper end of the backrest 1a of the storage unit 1, and is configured so that the opening can be opened and closed with the upper end of the backrest 1a as the base end.

[0015] A sub-storage section 6 is disposed on the outside of the front section 1c. A pocket section 7 is disposed on the outside of the sub-storage section 6. The sub-storage section 6 and the pocket section 7 are configured to be capable of storing stationery and the like. The sub-storage section 6 and the pocket section 7 are disposed between the lid section 2 and the front section 1c when the lid section 2 is closed.

[0016] The pair of shoulder belts 3 are configured to be worn at least on the shoulders of a user when the user carries the backpack 100 on his / her back. Each of the pair of shoulder belts 3 is connected to the backrest 1a of the storage unit 1 via a shoulder belt attachment 4. The upper end of each of the pair of shoulder belts 3 is attached to the shoulder belt attachment 4. In addition, each of the pair of shoulder belts 3 is connected to the bottom 1b of the storage unit 1 via a connecting member 5. The lower end of each of the pair of shoulder belts 3 is attached to the connecting member 5.

[0017] Each of the pair of shoulder straps mainly includes an upper strap 3a, a lower strap 3b, a fastener 3c, a cover member 3d, and a ring-shaped member 3e. The upper strap 3a has a plurality of strap holes 3a1. The upper end of the upper strap 3a is attached to a shoulder strap attachment 4. The lower end of the lower strap 3b is attached to a connecting member 5.

[0018] The upper belt 3a and the lower belt 3b are connected by a fastener 3c. The fastener 3c allows the length of the shoulder belt 3 to be adjusted. The fastener 3c has a pin 3c1 and a fastener body 3c2. The fastener 3c is attached to the upper end of the lower belt 3b. The fastener 3c is configured to engage the pin 3c1 with the belt hole 3a1 in a state where the upper belt 3a is inserted through the fastener body 3c2.

[0019] The cover member 3d is configured so that the upper belt 3a can be inserted therethrough. The cover member 3d is disposed between the upper belt 3a and the fastener main body 3c2 with the upper belt 3a inserted therethrough. The annular member 3e is attached to the lower belt 3b. The annular member 3e is configured so that the upper belt 3a connected to the lower belt 3b by the fastener 3c can be inserted therethrough.

[0020] The backpack belt attachment device 4 is for attaching a pair of backpack belts 3 to the storage unit 1. The backpack belt attachment device 4 is attached to the upper end of the backrest portion 1a of the storage unit 1. The backpack belt attachment device 4 comprises a main body portion 4a and a pair of connectors 4b. The main body portion 4a is attached to the upper end of the backrest portion 1a of the storage unit 1. The pair of connectors 4b are attached to the main body portion 4a.

[0021] As shown in Figures 1 and 3, the pair of connecting bodies 4b is rotatably attached to the main body 4a. When the pair of connecting bodies 4b is rotated upward, the pair of connecting bodies 4b protrudes upward from the main body 4a. When the pair of connecting bodies 4b is rotated downward, the pair of connecting bodies 4b protrudes downward from the main body 4a. The upper ends of the pair of shoulder straps 3 are attached to the respective tips of the pair of connecting bodies 4b. The upper ends of the pair of shoulder straps 3 are fixed to the respective tips of the pair of connecting bodies 4b by rivets.

[0022] 2 and 4, the connecting member 5 is for attaching the backpack belts 3 to the storage unit 1 together with the backpack belt attachment device 4. The connecting member 5 is attached to the bottom portion 1b. The lower ends of the pair of backpack belts 3 are attached to the connecting member 5.

[0023] The connecting member 5 has a pair of daruma rings 5a, a support portion 5b, a fixing portion 5c, and an operating portion 5d. The pair of daruma rings 5a are rotatably attached to the support portion 5b. The pair of daruma rings 5a are rotatable along the surface of the support portion 5b. The lower ends of the pair of shoulder belts 3 are attached to the pair of daruma rings 5a, respectively.

[0024] The support portion 5b supports a pair of daruma rings 5a on both sides in the longitudinal direction. The support portion 5b is configured to be able to support the fixed portion 5c in the center in the longitudinal direction. The fixed portion 5c is attached to the tip of the cover portion 2. The fixed portion 5c is configured to be fixed to the center of the support portion 5b by the operating portion 5d. The operating portion 5d is configured to be rotatable with respect to the support portion 5b. The operating portion 5d is configured to be able to be inserted into an elongated hole provided in the fixed portion 5c. The operating portion 5d is rotated with the operating portion 5d inserted into the elongated hole of the fixed portion 5c, whereby the fixed portion 5c is fixed to the support portion 5b.

[0025] 3 and 4, when each of the pair of connectors 4b is rotated downward relative to the main body 4a, each of the pair of shoulder straps 3 is prevented from protruding in the depth direction (front-rear direction) of the backpack 100. This saves space for the pair of shoulder straps 3. In this state, each of the pair of shoulder straps 3 is twisted.

[0026] As shown in FIG. 5, each of the pair of connecting bodies 4b rotates downward relative to the main body portion 4a, and the pair of daruma rings 5a rotates, whereby the twist of the pair of shoulder belts 3 is eliminated.

[0027] The configuration of the shoulder belt attachment device 4 according to the first embodiment will be described mainly with reference to Figs.

[0028] 1 and 6, the backpack belt attachment device 4 is for attaching a pair of backpack belts 3 to the backrest 1a of the backpack bag 100. The backpack belt attachment device 4 comprises a main body 4a and a pair of connectors 4b. The main body 4a can be attached to the backrest 1a of the backpack bag 100. The pair of connectors 4b can connect the respective upper ends of the pair of backpack belts 3.

[0029] As shown in Fig. 1 and Fig. 6 to Fig. 8, the main body 4a includes a case 4a1, a pair of movable levers 4a2, and a rotation shaft A. The case 4a1 is configured to house the base portions of the pair of connectors 4b. The case 4a1 is configured to house the pair of levers 4a2. A pair of holes H are provided on the surface of the case 4a1.

[0030] The pair of connecting bodies 4b is rotatably attached to the main body 4a. Each of the pair of connecting bodies 4b is configured to be rotatable between a first state in which the connecting bodies 4b rotate upward relative to the main body 4a and a second state in which the connecting bodies 4b rotate downward relative to the main body 4a by rotating in opposite directions along the backrest 1a. Each of the pair of connecting bodies 4b is configured to be rotatable around the rotation axis A of the main body 4a. Each of the pair of connecting bodies 4b is configured to be rotatable in the in-plane direction of the surface of the backrest 1a. The tip of each of the pair of connecting bodies 4b moves outside the main body 4a. Each of the pair of connecting bodies 4b is located on the opposite side to each other with respect to the main body 4a in the first state and the second state. In this embodiment, each of the pair of connecting bodies 4b is preferably rotated at an angle of 160 degrees or more and 180 degrees or less between the first state and the second state.

[0031] Each of the pair of lever portions 4a2 is configured to engage with each of the pair of connecting bodies 4b by moving away from each other, and to disengage from each of the pair of connecting bodies 4b by moving toward each other. A groove portion R is provided in the pair of lever portions 4a2. Each of the groove portions R provided in the pair of lever portions 4a2 is exposed from each of a pair of holes H provided in the case 4a1. When a user inserts his or her fingers into the groove portions R of the pair of lever portions 4a2 and moves the pair of lever portions 4a2 toward each other, the engagement between the pair of lever portions 4a2 and the pair of connecting bodies 4b is released.

[0032] As shown in Figs. 9 to 14, each of the pair of connectors 4b is configured to be engageable with the main body 4a. The case 4a1 includes a front member 4a11 and a back member 4a12. The rotation axis A extends in a direction in which the front member 4a11 and the back member 4a12 face each other. In other words, the axial direction of the rotation axis A is the direction in which the front member 4a11 and the back member 4a12 face each other. Figs. 9, 11, and 13 show a state in which the front member 4a11 is removed from the back member 4a12. In Figs. 10, 12, and 14, for the sake of convenience, no hatching is shown in the cross section. In Figs. 10, 12, and 14, for the sake of convenience, a holding member M for holding the shoulder belt attachment 4 is shown.

[0033] As shown in Figures 9 and 13, each of the pair of connectors 4b is configured to be able to engage with the main body 4a in the first state and the second state. In this embodiment, as shown in Figure 11, each of the pair of connectors 4b is configured to be able to engage with the main body 4a in an intermediate state between the first state and the second state.

[0034] As shown in Figures 9 and 13, when each of the pair of connecting bodies 4b rotates upward relative to the main body portion 4a and engages with the main body portion 4a, each of the pair of connecting bodies 4b engages with the main body portion 4a more strongly than when each of the pair of connecting bodies 4b rotates downward relative to the main body portion 4a and engages with the main body portion 4a.

[0035] Each of the pair of lever portions 4a2 includes a protrusion 4a21 protruding in opposite directions and a recess 4a22 provided at the tip of the protrusion 4a21. The protrusion 4a21 of each of the pair of lever portions 4a2 protrudes outward. The recess 4a22 of each of the pair of lever portions 4a2 is recessed inward.

[0036] The main body 4a includes a spring 4a3. The spring 4a3 is disposed between the pair of lever portions 4a2. The spring 4a3 biases the pair of lever portions 4a2 in a direction in which the pair of lever portions 4a2 move away from each other. The spring 4a3 is configured to press each of the pair of lever portions 4a2 against each of the pair of connecting bodies 4b with the biasing force. In this embodiment, the spring 4a3 is a coil spring.

[0037] Each of the pair of connecting bodies 4b includes a recess 4b1 that can engage with the convex portion 4a21, and a protrusion 4b2 that is provided at a distance from the recess 4b1 and can engage with the recessed portion 4a22. The protrusion 4b2 is provided at a distance from the recess 4b1 in the direction in which the pair of connecting bodies 4b rotate. The recess 4b1 of each of the pair of connecting bodies 4b is recessed toward the rotation shaft A to which each of the pair of connecting bodies 4b is attached. The protrusion 4b2 of each of the pair of connecting bodies 4b protrudes toward the opposite side to the rotation shaft A to which each of the pair of connecting bodies 4b is attached. The protrusion 4b2 has a lower engagement protrusion 4b21.

[0038] When each of the pair of connectors 4b rotates upward relative to the main body 4a and engages with the main body 4a, the convex portion 4a21 engages with the concave portion 4b1. When each of the pair of connectors 4b rotates downward relative to the main body 4a and engages with the main body 4a, the recessed portion 4a22 engages with the lower engagement protrusion 4b21. The contact area between the convex portion 4a21 and the concave portion 4b1 is larger than the contact area between the recessed portion 4a22 and the lower engagement protrusion 4b21.

[0039] When the convex portion 4a21, the recessed portion 4a22, the recessed portion 4b1, and the protruding portion 4b2 are viewed from a direction perpendicular to the direction in which the pair of lever portions 4a2 move, the convex portion 4a21 and the recessed portion 4b1 are configured in a rectangular shape, and the recessed portion 4a22 and the protruding portion 4b2 are configured in a semicircular shape. The radius of the rounded corners of the convex portion 4a21 and the recessed portion 4b1 is smaller than the radius of the rounded corners of the recessed portion 4a22 and the protruding portion 4b2. In this embodiment, the convex portion 4a21 and the recessed portion 4b1 have corners, and the recessed portion 4a22 and the protruding portion 4b2 do not have corners.

[0040] The pair of lever portions 4a2 and the pair of connecting bodies 4b are configured so that sound is generated when recessed portions 4a22 of the pair of lever portions 4a2 collide with protruding portions 4b2 of the pair of connecting bodies 4b due to the elasticity of the spring 4a3.

[0041] Next, the effects of the first embodiment will be described. According to the backpack belt attachment 4 in the first embodiment, each of the pair of connecting bodies 4b is configured to be rotatable between a first state in which the connecting bodies 4b rotate upward relative to the main body 4a and a second state in which the connecting bodies 4b rotate downward relative to the main body 4a by rotating in opposite directions along the backrest 1a, and is configured to be engageable with the main body 4a in the first state and the second state. Therefore, each of the pair of connecting bodies 4b rotates downward relative to the main body 4a by rotating in opposite directions along the backrest 1a, thereby preventing the pair of backpack belts 3 connected to the pair of connecting bodies 4b from protruding in the depth direction (front-rear direction) of the backpack 100. This allows the pair of backpack belts 3 to be space-saving. This makes it easy to store the backpack 100 in a narrow space. This makes it easy to put the backpack 100 into a locker or the like. In addition, it is possible to prevent the backpack belts 3 from being damaged by contact with the locker or the like when putting the backpack 100 into the locker or the like.

[0042] According to the backpack belt attachment device 4 in the first embodiment, each of the pair of lever portions 4a2 is configured to engage with each of the pair of connecting bodies 4b by moving away from each other, and to disengage from each of the pair of connecting bodies 4b by moving toward each other. Therefore, the main body portion 4a and the pair of connecting bodies 4b are engaged by each of the pair of lever portions 4a2 moving away from each other. Also, the engagement with each of the pair of connecting bodies 4b is disengaged by each of the pair of lever portions 4a2 moving toward each other. Therefore, the engagement between the main body portion 4a and the pair of connecting bodies 4b, or the connection between the main body portion 4a and the pair of connecting bodies 4b can be released by the pair of lever portions 4a2.

[0043] According to the backpack belt attachment 4 in the first embodiment, when each of the pair of connecting bodies 4b rotates upward relative to the main body 4a and engages with the main body 4a, each of the pair of connecting bodies 4b engages with the main body 4a more strongly than when each of the pair of connecting bodies 4b rotates downward relative to the main body 4a and engages with the main body 4a. When each of the pair of connecting bodies 4b rotates upward relative to the main body 4a and engages with the main body 4a, it is preferable that each of the pair of connecting bodies 4b firmly engages with the main body 4a because the user carries the backpack 100 on his / her back. On the other hand, when each of the pair of connecting bodies 4b rotates downward relative to the main body 4a and engages with the main body 4a, it is preferable that each of the pair of connecting bodies 4b easily rotates upward relative to the main body 4a because the user carries the backpack 100 on his / her back. Therefore, when each of the pair of connecting bodies 4b is rotated upward relative to the main body portion 4a and engaged with the main body portion 4a, each of the pair of connecting bodies 4b can be firmly engaged with the main body portion 4a when the backpack 100 is carried by the user, and when each of the pair of connecting bodies 4b is rotated downward relative to the main body portion 4a and engaged with the main body portion 4a, each of the pair of connecting bodies 4b can be easily rotated upward relative to the main body portion 4a in order for the user to carry the backpack 100 on their back.

[0044] According to the backpack belt attachment 4 in the first embodiment, when each of the pair of connectors 4b rotates upward relative to the main body 4a and engages with the main body 4a, the convex portion 4a21 engages with the concave portion 4b1. When each of the pair of connectors 4b rotates downward relative to the main body 4a and engages with the main body 4a, the concave portion 4a22 engages with the lower engagement protrusion 4b21. The contact area between the convex portion 4a21 and the concave portion 4b1 is larger than the contact area between the concave portion 4a22 and the lower engagement protrusion 4b21. Therefore, when each of the pair of connectors 4b rotates upward relative to the main body 4a and engages with the main body 4a, each of the pair of connectors 4b can engage with the main body 4a more strongly than when each of the pair of connectors 4b rotates downward relative to the main body 4a and engages with the main body 4a.

[0045] According to the backpack belt attachment device 4 in the first embodiment, when the convex portion 4a21, the recessed portion 4a22, the concave portion 4b1 and the protruding portion 4b2 are viewed from a direction perpendicular to the direction in which the pair of lever portions 4a2 move, the convex portion 4a21 and the recessed portion 4b1 are configured in a rectangular shape, and the concave portion 4a22 and the protruding portion 4b2 are configured in a semicircular shape. Therefore, when each of the pair of connecting bodies 4b rotates upward with respect to the main body portion 4a and engages with the main body portion 4a, each of the pair of connecting bodies 4b can engage with the main body portion 4a more strongly than when each of the pair of connecting bodies 4b rotates downward with respect to the main body portion 4a and engages with the main body portion 4a.

[0046] According to the backpack belt attachment device 4 of the first embodiment, the pair of levers 4a2 and the pair of connectors 4b are configured to generate sound when the elasticity of the spring 4a3 causes the recesses 4a22 of the pair of levers 4a2 to collide with the protrusions 4b2 of the pair of connectors 4b. Therefore, sound can be generated when each of the pair of connectors 4b rotates relative to the main body 4a.

[0047] According to backpack bag 100 in the first embodiment, a pair of backpack belts 3 are attached to backrest portion 1a by backpack belt attachment device 4. Therefore, by rotating backpack belt attachment device 4, the space taken up by pair of backpack belts 3 can be reduced. This makes it easy to store backpack bag 100 in a small space.

[0048] According to backpack 100 in the first embodiment, the lower ends of the pair of shoulder straps 3 are attached to the pair of daruma hooks 5a, respectively. Therefore, the pair of connectors 4b rotate downward relative to main body 4a, and the pair of daruma hooks 5a rotate, thereby eliminating the twist of the pair of shoulder straps 3. This further prevents the pair of shoulder straps 3 connected to the pair of connectors 4b from protruding in the depth direction (front-rear direction) of backpack 100. This further reduces the space required for the pair of shoulder straps 3. This makes it easier to store backpack 100 in a small space.

[0049] (Embodiment 2) Unless otherwise specified, backpack 100 in embodiment 2 has the same configuration and functions as backpack 100 in accordance with embodiment 1. In embodiment 2, backpack 100 is, as an example, a backpack.

[0050] The configuration of backpack 100 in the second embodiment will be described with reference to Figs.

[0051] As shown in Figures 15 and 16, the backpack 100 in embodiment 2 comprises a storage section 1, a lid section 2, a pair of backpack straps 3, a backpack strap attachment device 4, a pocket section 7, a connecting member 10, a pair of side pockets 11, and a handle 12.

[0052] In this embodiment, the pocket portion 7 is disposed on the outside of the front portion 1c. A pair of side pockets 11 are disposed on each of the pair of side portions 1d. The side pockets 11 are configured to be capable of storing stationery and the like.

[0053] Each of the pair of shoulder straps 3 is connected to the lower end of the backrest 1a of the storage unit 1 via a connecting member 10. The lower end of each of the pair of shoulder straps 3 is attached to the connecting member 10. Each of the pair of shoulder straps mainly has an upper belt 3a, a lower belt 3b, and a ladder lock 3f. The upper end of the upper belt 3a is attached to the shoulder strap attachment tool 4. The lower end of the lower belt 3b is attached to the connecting member 10. The upper belt 3a and the lower belt 3b are connected by the ladder lock 3f. The ladder lock 3f allows the length of the shoulder strap 3 to be adjusted. In this embodiment, a handle 12 is connected to the lid 2.

[0054] 17 and 18, when each of the pair of connectors 4b is rotated downward relative to the main body 4a, each of the pair of shoulder straps 3 is prevented from protruding in the depth direction (front-rear direction) of the backpack 100. This allows the pair of shoulder straps 3 to be space-saving.

[0055] In this state, the lower belts 3b of the pair of shoulder belts 3 are twisted. In this embodiment, the thickness of the lower belts 3b of the pair of shoulder belts 3 is thin, so that even if the lower belts 3b are twisted, they are prevented from protruding in the depth direction (front-rear direction) of the backpack 100.

[0056] In the backpack belt attachment device 4 in the second embodiment, the pair of connectors 4b also rotate in opposite directions along the backrest 1a, thereby rotating downward relative to the main body 4a, thereby preventing the pair of backpack belts 3 connected to the pair of connectors 4b from protruding in the depth direction (front-rear direction) of the backpack 100. This makes it possible to reduce the space required for the pair of backpack belts 3. This makes it easier to store the backpack 100 in a small space.

[0057] Furthermore, in backpack bag 100 in the second embodiment, a pair of backpack belts 3 are attached to backrest portion 1a by backpack belt attachment device 4. Therefore, backpack belt attachment device 4 can reduce the space required for pair of backpack belts 3. This makes it easy to store backpack bag 100 in a small space.

[0058] The embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present invention is defined by the claims, not the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0059] 1 storage section, 1a back support section, 1b bottom section, 1c front section, 1d side section, 2 lid section, 3 shoulder strap, 4 shoulder strap attachment device, 4a main body section, 4a1 case, 4a2 lever section, 4a21 convex section, 4a22 recess section, 4b connecting body, 4b1 recess section, 4b2 protruding section, 5 connecting member, 5a dharma ring, 5b support section, 100 shoulder bag.

Claims

1. A backpack belt attachment device for attaching a pair of backpack belts to a backrest of a backpack bag, comprising: A main body portion that can be attached to the backrest portion of the backpack; a pair of connectors that can connect the upper ends of the pair of shoulder straps and are rotatably attached to the main body; A shoulder belt attachment device in which each of the pair of connecting bodies is configured to be rotatable in opposite directions along the back support portion to a first state in which it is rotated upward relative to the main body portion and a second state in which it is rotated downward, and is configured to be engageable with the main body portion in the first state and the second state.

2. The main body portion includes a pair of movable lever portions, 2. The backpack belt attachment device according to claim 1, wherein each of the pair of lever portions is configured to engage with each of the pair of connecting bodies by moving away from each other, and to release engagement with each of the pair of connecting bodies by moving toward each other.

3. 3. The backpack belt attachment device according to claim 2, wherein when each of the pair of connecting bodies is rotated upward relative to the main body portion and engaged with the main body portion, the connecting bodies engage with the main body portion more strongly than when each of the pair of connecting bodies is rotated downward relative to the main body portion and engaged with the main body portion.

4. Each of the pair of lever portions includes a protrusion protruding in opposite directions and a recess provided at a tip of the protrusion, Each of the pair of connectors includes a recess that can be engaged with the protrusion, and a protrusion that is spaced apart from the recess and can be engaged with the recess, The protrusion has a lower engagement protrusion, When each of the pair of connectors rotates upward relative to the main body and engages with the main body, the convex portion and the concave portion engage with each other, When each of the pair of connecting bodies is rotated downward relative to the main body and engaged with the main body, the recess and the lower engagement protrusion are engaged with each other, 4. The backpack belt attaching device according to claim 3, wherein a contact area between said convex portion and said concave portion is larger than a contact area between said recessed portion and said lower engaging protrusion.

5. When the convex portion, the concave portion, the recessed portion, and the protruding portion are viewed from a direction perpendicular to a direction in which the pair of lever portions move, The protrusion and the recess are formed in a rectangular shape, 5. The backpack belt attachment device according to claim 4, wherein said recess and said protrusion are configured in a semicircular shape.

6. The body portion includes a spring. The spring is disposed between the pair of lever portions, 5. The backpack belt attachment device according to claim 4, wherein the pair of lever portions and the pair of connecting bodies are configured so as to generate sound when the elasticity of the spring causes the recesses of the pair of lever portions to collide with the protrusions of the pair of connecting bodies.

7. The backrest portion, The pair of shoulder belts; The backpack belt attachment device according to any one of claims 1 to 6, The pair of shoulder belts are attached to the backrest portion by the shoulder belt attachment device.

8. The bottom and a connecting member attached to the bottom portion, The connecting member includes a pair of dhammars and a support portion, The pair of Dharma cans are rotatably attached to the support, 8. The backpack according to claim 7, wherein the lower ends of the pair of shoulder straps are attached to the pair of dummy hooks, respectively.

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