Shoulder strap structure and bags equipped with a shoulder strap structure

Abstract

The present invention provides a shoulder strap structure that can be easily worn diagonally across the body, and a bag equipped with such a shoulder strap structure. [Solution] In the bag 1 equipped with a shoulder belt structure 10, the locking part 8 is locked to the locking receiving part 9 in a first state, and then the locking part 8 is released from the locking receiving part 9, and the adjustment part 6 of the belt part 3, which was passed through the annular part 7, is pulled back in the opposite direction to the direction in which it was passed through the annular part 7, resulting in a second state in which the locking part 8 is locked to the annular part 7. This allows the usable length of the belt part 3 (shoulder strap 5 and adjustment part 6) to be increased. Therefore, the user can easily wear the bag diagonally across their body using the belt part 3 with an increased usable length.

Description

Technical Field

[0001] The present invention relates to a shoulder belt structure and a bag provided with the shoulder belt structure.

Background Art

[0002] Conventionally, some bags such as rucksacks that are used by being carried on a user's back allow the length of the shoulder belt to be adjusted to fit the user's body. For example, Patent Document 1 discloses a backpack that includes a bag body, a shoulder strap arranged at a position to be hung over the user's shoulder, an upper webbing that is guided by the shoulder strap to be movable relatively in the longitudinal direction of the shoulder strap, one end of the upper webbing is connected to the bag body, the upper webbing is folded back near the other end and the other end is fixed to a part of the shoulder strap, and a lower webbing of which one end is connected to be capable of relative displacement with respect to the upper webbing and the other end is fixed near the bottom of the bag body. In this backpack, when the user pulls the upper webbing toward the front while carrying the backpack on the back, the operation of pulling the bag body toward the user's body and the operation of adjusting the folded length near the other end of the upper webbing can be performed simultaneously. As a result, the overall length of the shoulder belt can be shortened.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] On the other hand, in recent years, there has been a demand for a way to be considerate of those around the user, for example, when using public transportation such as trains, by changing the way a backpack or other bag is worn across the body and held in front of the user. However, it is not easy to wear a backpack or other conventional backpacks in this way, as described in Patent Document 1.

[0005] Therefore, the present invention aims to provide a shoulder strap structure that can be easily worn diagonally, and a bag equipped with a shoulder strap structure. [Means for solving the problem]

[0006] The shoulder belt structure of the present invention is provided on the main body of a bag in which articles are stored, and comprises a belt portion connected to the upper part of the main body, a locking receiving portion formed in the middle of the longitudinal direction of the belt portion, an annular portion formed on the lower part of the main body, and a locking portion formed on the tip of the belt portion that passes through the annular portion, and is characterized in that the usable length, which is the length of the belt portion from the upper part to the annular portion, can be increased by moving from a first state in which the belt portion is folded back at the annular portion and the locking portion is locked to the locking receiving portion, to a second state in which the locking portion is released from the locking receiving portion and the belt portion that was passed through the annular portion is pulled back in the opposite direction to the direction in which it was passed through the annular portion and the locking portion is locked to the annular portion.

[0007] The shoulder belt structure of the present invention is characterized in that the locking receiver is provided at a position corresponding to the chest of the user who is carrying the bag on their back with the belt portion slung over their shoulder.

[0008] The shoulder belt structure of the present invention is characterized in that a magnet is provided on either the locking receiving portion or the locking portion, and an adsorbent that is attracted to the magnet is provided on the other of the locking receiving portion or the locking portion.

[0009] The shoulder belt structure of the present invention is characterized in that the locking receiving portion and the locking portion are provided with a locking mechanism for maintaining the first state.

[0010] The bag of the present invention comprises the main body and one of the above-described shoulder belt structures, wherein the main body has a back support surface that is the surface that corresponds to the user's back when the bag is carried on the back, and the shoulder belt structure is provided in pairs on both sides of the back support surface in the width direction. [Effects of the Invention]

[0011] The shoulder strap structure of this invention allows for an increased length of the strap from the top of the bag to the annular section. This is achieved by firstly having the strap folded back at the annular section and the locking portion secured to the locking receiver, then releasing the locking portion from the locking receiver, pulling the strap that was passed through the annular section back in the opposite direction to the direction it was passed through, and securing the locking portion to the annular section. Therefore, with a bag equipped with the shoulder strap structure of this invention, the user can easily wear the bag diagonally across their body using the increased length of the strap.

[0012] In the shoulder belt structure of this invention, the locking receiver is positioned at a location corresponding to the chest of the user when the belt is slung over the shoulder and the bag is worn on the back. Therefore, it is easy for the user to grasp the locking part that is locked to the locking receiver while wearing the bag on their back, and easy to release the locking part from the locking receiver.

[0013] The shoulder belt structure of this invention has a magnet provided on either the locking receiver or the locking part, and an adsorbent that is attracted to the magnet provided on the other of the locking receiver or the locking part. As a result, the locking part and the locking receiver are attracted to each other, making it easy to lock the locking part to the locking receiver. In addition, the locking part that is locked to the locking receiver is less likely to come off the locking receiver.

[0014] The shoulder belt structure of this invention is provided with a locking mechanism in the locking receiver and the locking part to maintain the first state. Therefore, it is possible to prevent the locking part from coming off the locking receiver at a time unintended by the user.

[0015] The bag of this invention comprises a main body and one of the above-described shoulder belt structures, wherein the main body has a back support surface, and a pair of shoulder belt structures are provided on both sides of the back support surface in the width direction. Therefore, in addition to being usable as a backpack, the bag has the same effect as the above-described shoulder belt structure. [Brief explanation of the drawing]

[0016] [Figure 1] This is a rear view illustrating the first state of a bag equipped with a shoulder belt structure according to an embodiment of the present invention. [Figure 2] This is a perspective view illustrating a bag equipped with a shoulder belt structure according to an embodiment of the present invention, showing the state in which the locking portion is detached from the locking receiving portion. [Figure 3] This is a rear view illustrating a second state of a bag equipped with a shoulder belt structure according to an embodiment of the present invention. [Figure 4] This is a partially enlarged view illustrating a second state in a bag equipped with a shoulder belt structure according to an embodiment of the present invention. [Figure 5] This is a front view (1) showing the procedure for changing the position of a bag equipped with a shoulder belt structure according to an embodiment of the present invention from a state in which the user carries it on their back to a state in which it is worn diagonally across the body. [Figure 6] This is a front view (2) showing the procedure for changing the position of a bag equipped with a shoulder belt structure according to an embodiment of the present invention from a state in which the user carries it on their back to a state in which it is worn diagonally across the body. [Figure 7] This is a front view (3) showing the procedure for changing the position of a bag equipped with a shoulder belt structure according to an embodiment of the present invention from a state in which the user carries it on their back to a state in which it is worn diagonally across the body. [Modes for carrying out the invention]

[0017] Hereinafter, a bag 1 provided with a shoulder belt structure according to an embodiment of the present invention will be described with reference to FIG. 1 to FIG. 7. In the following description, with reference to the bag 1 shown in FIG. 1, the vertical direction of the bag 1 is defined as the up-down direction X, and the width direction of the bag 1 is defined as the left-right direction Y for explanation.

[0018] FIG. 1 is a rear view of the bag 1. The bag 1 is a rucksack that a user carries on their back for use. The bag 1 includes a bag body 2 in which articles are stored, and a pair of shoulder belt structures 10 provided on both left and right sides of the bag body 2. The bag body 2 corresponds to the "main body portion" in the present invention.

[0019] In the bag 1, the bag body 2 has a back support surface 2a which is a surface corresponding to the back when the user carries the bag 1 on their back. A left shoulder belt structure 10a corresponding to the user's left shoulder is provided on the left side of the back support surface 2a, and a right shoulder belt structure 10b corresponding to the user's right shoulder is provided on the right side of the back support surface 2a. The bag body 2 is formed in a bag shape from a fabric using synthetic fibers such as nylon or polyester as a material, for example.

[0020] The left and right shoulder belt structures 10a and 10b have a bilaterally symmetric structure. Therefore, in the following description of the shoulder belt structure 10, the left shoulder belt structure 10a corresponding to the user's left shoulder will be mainly described, and the description of the right shoulder belt structure 10b corresponding to the user's right shoulder will be omitted.

[0021] The left shoulder belt structure 10a has a belt portion 3 that the user can hang over their shoulder. Specifically, the belt portion 3 is composed of a shoulder hanging portion 5 whose one end 5a is connected to the upper portion 2b of the bag body 2, and an adjustment portion 6 whose one end, which is one end portion 6a, is connected to the other end 5b of the shoulder hanging portion 5. By hanging the belt portion 3 composed of the shoulder hanging portion 5 and the adjustment portion 6 over the shoulder, the user can carry the bag 1 on their back for use.

[0022] Furthermore, if the shoulder belt structure 10 is provided in pairs on the left and right sides, it may also have a so-called chest belt 4 to connect the left and right belt sections 3,3 to each other when the user places the left and right belt sections 3,3 on their shoulders and carries the bag 1 on their back, thereby preventing the belt sections 3,3 from slipping off the shoulders. The chest belt 4 is provided with a so-called side-release buckle 4a that can be easily attached and detached in front of the user's chest.

[0023] The shoulder strap structure 10a, in addition to the belt portion 3, further includes an annular portion 7 formed on the lower part 2c of the bag body 2, a locking portion 8 formed on the other end 6b, which is the other end of the adjustment portion 6 that passes through the annular portion 7, and a locking receiving portion 9 (Figure 2) formed on the end 5b of the shoulder strap portion 5, to which the locking portion 8 can be locked. The other end 6b of the adjustment portion 6 corresponds to the "tip portion" of the belt portion 3.

[0024] The shoulder strap portion 5 is the part of the belt portion 3 that corresponds to the user's shoulder and is formed in a band shape. One end 5a of the shoulder strap portion 5 is sewn to the upper part 2b of the bag body 2, and one end 6a of the adjustment portion 6 is sewn to the other end 5b. Although not shown in the illustration, the back surface of the shoulder strap portion 5 (the side that is closer to the user's body when in use) is provided with a mesh fabric that prevents stuffiness and also functions as an anti-slip surface.

[0025] The adjustment section 6, together with the shoulder strap section 5, constitutes the belt section 3 and is formed in the shape of a flat cord. One end 6a of the adjustment section 6 is sewn to the end 5b of the shoulder strap section 5, and the other end 6b, which corresponds to the tip of the belt section 3, is passed through the hole 7a of the annular section 7. A locking section 8 is formed on the other end 6b of the adjustment section 6 (the tip of the belt section 3) that is passed through the hole 7a of the annular section 7. The material of the shoulder strap section 5 and the adjustment section 6 is not particularly limited, but in the bag 1 according to this embodiment, synthetic fibers such as nylon or polyester are used.

[0026] The annular portion 7 is the part through which the other end 6b of the adjustment portion 6 passes. Specifically, the annular portion 7 is formed by attaching a roughly rectangular annular member made of synthetic resin such as nylon or polyester to the lower part of the bag body 2. The annular portion 7 corresponding to the left shoulder belt structure 10a is formed at the left end of the lower part 2c of the bag body 2, and the annular portion 7 corresponding to the right shoulder belt structure 10b is formed at the right end of the lower part 2c of the bag body 2.

[0027] Furthermore, the annular portion 7 has a hole 7a that is large enough to allow the other end 6b of the adjustment portion 6 to pass through. This hole 7a is used to fold back the adjustment portion 6 by passing the other end 6b of the adjustment portion 6 through it. The method of attaching the annular member that forms the annular portion 7 is not particularly limited, but in the bag 1 according to this embodiment, the annular member is attached by sewing both ends of the flat cord passed through the hole 7a to a substantially triangular reinforcing portion 2d provided on the lower part 2c of the bag body 2.

[0028] Furthermore, the hole 7a is formed to be too small for the locking portion 8, which will be described later, to pass through. Therefore, for example, as shown in Figure 2, when the locking portion 8, which was locked to the locking receiving portion 9, is released from the locking receiving portion 9, and the shoulder strap portion 5 is pulled upward and the adjustment portion 6 is pulled in the direction indicated by arrow A1 (Figure 2), the adjustment portion 6, which was passed through the hole 7a of the annular portion 7, is pulled back in the direction indicated by arrow A2 (Figure 2), which is the opposite direction to the direction in which it was passed through the annular portion 7. As a result, as shown in Figures 3 and 4, the locking portion 8 catches on the annular portion 7 and is locked in place, preventing the other end 6b (the tip of the belt portion 3) of the adjustment portion 6, which was passed through the hole 7a, from coming out. Note that the annular portion 7 is not limited to one formed by attaching an annular member, but may also be formed, for example, by sewing a cord in a ring shape to the bag body 2 or the reinforcing portion 2d. Also, below, "passing through the hole 7a of the annular portion 7" may also be written as "passing through the annular portion 7".

[0029] The locking portion 8 and the locking receiving portion 9 are formed by a so-called side-release type buckle that can be freely attached to and detached from each other. The material of the buckle for forming the locking portion 8 and the locking receiving portion 9 is not particularly limited, but in the bag 1 according to this embodiment, a buckle made of synthetic resin such as nylon or polyester is used.

[0030] The locking portion 8 is formed by locking the female buckle to the other end 6b (the tip of the belt portion 3) of the adjustment portion 6, which is passed through the annular portion 7 and folded back. Specifically, the locking portion 8 is formed by passing the other end 6b through the first hole of the female buckle, folding the other end 6b that has passed through the first hole back and passing it through the second hole, thereby locking the female buckle to any position on the other end 6b by the frictional force of the adjustment portion 6.

[0031] The locking receiver 9 is formed by attaching a male buckle to the belt portion 3 (shoulder strap portion 5 and adjustment portion 6) midway along its longitudinal direction, as shown in Figure 2, more specifically, at a position corresponding to the user's chest when the user places the belt portion 3 over their shoulder and carries the bag 1 on their back, as shown in Figure 5. The locking receiver 9 is formed by passing one end 6a of the adjustment portion 6 through a hole formed in the male buckle, sewing this end 6a to the end 5b of the shoulder strap portion 5 before and after the hole, and attaching the male buckle to the end 5b. The longitudinal direction of the belt portion 3 refers to the direction in which the shoulder strap portion 5 and adjustment portion 6 that constitute the belt portion 3 extend, and is perpendicular to the width direction of the strip-shaped shoulder strap portion 5 and the flat cord-shaped adjustment portion 6, respectively.

[0032] As shown in Figure 2, the male buckle forming the locking receiver 9 has a projection 9b extending from a plate-shaped base 9a, and an annular groove 9c is formed on the side surface of this projection 9b. Although not shown in the figure, the female buckle forming the locking portion 8 has an insertion hole formed on the side (back side) facing the base 9a when the locking portion 8 is locked to the locking receiver 9, into which the projection 9b can be inserted. The inner wall of this insertion hole is provided with a locking piece that is inserted into the annular groove 9c of the projection 9b inserted into the insertion hole. When this locking piece is inserted into the annular groove 9c, the female buckle and the male buckle are connected, and the locked state between the locking portion 8 and the locking receiver 9 is maintained. Thus, the state in which the locking portion 8 formed at the other end 6b (the tip of the belt portion 3) of the adjustment portion 6 folded back by the annular portion 7 is locked to the locking receiver 9 corresponds to the "first state" in the present invention.

[0033] Furthermore, when the locking piece of the female buckle forming the locking portion 8 is inserted into the annular groove 9c of the protrusion 9b, and the locking state between the locking portion 8 and the locking receiving portion 9 is maintained, the locking portion 8 and the locking receiving portion 9 are in a locked state. In other words, the "locking mechanism" in the present invention is realized by the locking piece of the locking portion 8 and the annular groove 9c of the protrusion 9b. The locking mechanism may also be realized, for example, by forming the locking portion 8 and the locking receiving portion 9 using general side-release buckles, and inserting the claw provided on the male buckle of these side-release buckles into the female buckle while elastically deforming it, and the connected state of both buckles is maintained by the claw catching on a groove or hole provided in the female buckle. The form is not limited. Furthermore, the female buckle forming the locking portion 8 has a locking piece that is linked to a side button 8a provided on the buckle. By pressing the side button 8a while the locking portion 8 is locked to the locking receiving portion 9, the locking state between the locking piece and the annular groove 9c can be released, thereby disengaging the locking state between the locking portion 8 and the locking receiving portion 9.

[0034] Furthermore, magnets are provided inside the locking portion 8 and the locking receiving portion 9 in a direction that attracts each other. Therefore, when the locking portion 8 is brought close to the locking receiving portion 9, they are attracted to each other by the magnetic force of the magnets, making it easy to lock the locking portion 8 to the locking receiving portion 9. Thus, with the bag 1 according to this embodiment, locking the locking portion 8 and the locking receiving portion 9 is easier compared to one without magnets. In this embodiment of the bag 1, an example is shown in which magnets are provided inside both the locking portion 8 and the locking receiving portion 9, but it is also possible to provide a magnet inside either the locking portion 8 or the locking receiving portion 9, and provide a metal such as iron that is attracted to the magnet inside the other of the locking portion 8 or the locking receiving portion 9. In this invention, "adsorbent body attracted to a magnet" refers to a metal such as iron that is attracted to a magnet, or a magnet.

[0035] As described above, the locking portion 8 can also be detached from the locking receiving portion 9 and locked onto the annular portion 7. Specifically, as shown in Figure 2, with the locking portion 8 detached from the locking receiving portion 9, as shown in Figure 3, when the shoulder strap portion 5 is pulled upward and the adjustment portion 6 is pulled in the direction indicated by arrow A1 (Figure 2), the adjustment portion 6, which was passed through the hole 7a of the annular portion 7, is pulled back in the direction indicated by arrow A2 (Figure 2), which is the opposite direction to the direction in which it was passed through the annular portion 7. At this time, as described above, the hole 7a of the annular portion 7 is formed to be too small for the locking portion 8 to pass through, so as shown in Figure 4, the locking portion 8 formed on the other end 6b of the adjustment portion 6 catches on the annular portion 7. This state in which the locking portion 8 is locked to the annular portion 7 corresponds to the "second state" in the present invention.

[0036] Here, referring to Figure 3, we will explain the "first state" in which the adjustment part 6 is folded back at the annular part 7 and the locking part 8 is locked to the locking receiving part 9, and the "second state" in which the adjustment part 6, which was passed through the annular part 7, is pulled back in the opposite direction to the direction in which it was passed through the annular part 7 and the locking part 8 is locked to the annular part 7. Figure 3 shows the right shoulder belt structure 10b, which is the first state, and the left shoulder belt structure 10a, which is the second state.

[0037] In the second state, the left shoulder belt structure 10a, the length L1 from the annular portion 7 to the locking receiving portion 9 of the adjustment portion 6 of the belt portion 3 is approximately twice as long as the length L2 from the annular portion 7 to the locking receiving portion 9 of the adjustment portion 6 of the belt portion 3 in the first state, the right shoulder belt structure 10b. This is because, in the second state, most of the adjustment portion 6 that was passed through the annular portion 7 and folded back in the first state is pulled back towards the shoulder strap portion 5 side through the annular portion 7 again. Therefore, in the second state, compared to the first state, the length from the annular portion 7 to the locking receiving portion 9 of the adjustment portion 6 of the belt portion 3 is longer, which increases the usable length of the entire belt portion 3, which is the length from the end portion 5a of the shoulder strap portion 5 connected to the upper part 2b of the bag body 2 to the annular portion 7.

[0038] The usable length refers to the length from the end 5a of the shoulder strap 5 connected to the upper part 2b of the bag body 2 to the annular part 7 of the belt section 3. In other words, it indicates the length of the usable portion of the belt section 3 when the user uses the belt section 3, such as when carrying the bag 1 on their back. Therefore, when the usable length increases, it does not mean that the total length of the belt section 3 is stretched, but rather that the total length of the belt section 3 remains the same, while the adjustment portion 6, which was passed through the annular part 7 and folded back in the first state, is pulled back through the annular part 7 towards the shoulder strap 5 side, thereby making the usable portion of the belt section 3 relatively longer.

[0039] The shoulder strap structure 10 has now been explained. Next, the effects of the shoulder belt structure 10 and the bag 1 equipped with the shoulder belt structure 10 according to this embodiment will be described.

[0040] In the shoulder belt structure 10 and the bag 1 equipped with the shoulder belt structure 10, the locking portion 8 is locked to the locking receiving portion 9 in a first state, and then the locking portion 8 is released from the locking receiving portion 9, and the adjustment portion 6 of the belt portion 3, which was passed through the annular portion 7, is pulled back in the direction indicated by arrow A2 (Figure 2), which is the opposite direction to the direction in which it was passed through the annular portion 7, resulting in a second state in which the locking portion 8 is locked to the annular portion 7. This allows the usable length of the belt portion 3 (shoulder strap portion 5 and adjustment portion 6) to be increased. Therefore, the user can easily wear the bag diagonally across their body using the belt portion 3 with an increased usable length.

[0041] For example, let's consider the case where a user carrying bag 1 on their back uses the right shoulder strap structure 10b to carry bag 1 diagonally across their body and in front of them. First, as shown in Figure 5, the user releases the locking part 8 from the locking receiver 9 in the first state of the right shoulder strap structure 10b. Then, as shown in Figure 6, the user pulls the shoulder strap portion 5 of the belt portion 3 upwards while pulling the adjustment portion 6, which was passed through the annular portion 7, back towards the shoulder strap portion 5, thereby putting the right shoulder strap structure 10b into a second state where the locking part 8 is locked to the annular portion 7. The user then passes their head through the inside of the belt portion 3 of the right shoulder strap structure 10b in this second state. At the same time, the user moves the bag body 2, which was on their back, to the front of their body. As a result, as shown in Figure 7, the bag 1 can be easily changed to a state where it is carried diagonally across the body and in front of them.

[0042] In this case, as shown in Figure 5, the bag 1 has a locking receiver 9 positioned at the chest of the user who is carrying the bag 1 on their back with the belt portion 3 slung over their shoulder. This makes it easy for the user to grasp the locking portion 8 that is locked to the locking receiver 9 and to release the locking portion 8 from the locking receiver 9 while carrying the bag 1. Furthermore, since magnets are provided inside both the locking portion 8 and the locking receiver 9 in the bag 1, the locking portion 8 and the locking receiver 9 are attracted to each other, making it easy to lock the locking portion 8 to the locking receiver 9, and making it difficult for the locking portion 8, once locked to the locking receiver 9, to come off. In addition, the locking portion 8 and the locking receiver 9 are provided with a locking mechanism to maintain the first state, which prevents the locking portion 8 from coming off the locking receiver 9 at an unintended time by the user.

[0043] Although embodiments of the present invention have been described in detail above, the present invention is not limited to the embodiments described above. Furthermore, various design modifications can be made to the present invention as long as they do not deviate from the matters described in the claims for utility model registration.

[0044] For example, in this embodiment, the bag 1 is shown as an example in which the belt portion 3 is composed of a shoulder strap portion 5 and an adjustment portion 6. However, the belt portion 3 may not be divided into a shoulder strap portion 5 and an adjustment portion 6. For example, the belt portion 3 may be composed only of a strip-shaped belt like the shoulder strap portion 5, or the belt portion 3 may be composed only of a flat cord-shaped belt like the adjustment portion 6.

[0045] Furthermore, in the bag 1 according to this embodiment, an example was shown in which the locking portion 8 and the locking receiving portion 9 are formed by a so-called side-release buckle. However, for example, the locking portion 8 may be formed by attaching a locking device such as a carabiner to the other end 6b of the adjustment portion 6 (the tip of the belt portion 3), and the locking receiving portion 9 may be formed by attaching an annular member such as a so-called D-ring to the middle of the belt portion 3 (shoulder portion 5 or adjustment portion 6). In this case, when the carabiner forming the locking portion 8 is hooked onto the D-ring forming the locking receiving portion 9, the locking state between the locking portion 8 and the locking receiving portion 9 is maintained and it becomes a locked state. Therefore, the "locking mechanism" in the present invention can also be realized by a locking device such as a carabiner and an annular member such as a D-ring.

[0046] Furthermore, in the bag 1 according to this embodiment, the locking receiver 9 is shown as being located at a position corresponding to the chest of the user who is carrying the bag 1 on their back with the belt portion 3 slung over their shoulder. However, the locking receiver 9 may be located at any position along the longitudinal direction of the belt portion 3, more specifically, along the longitudinal direction of the belt portion 3 before it is passed through the annular portion 7. Also, in the bag 1 according to this embodiment, magnets are shown on both the locking portion 8 and the locking receiver 9. However, the locking portion 8 and the locking receiver 9 may not have magnets, and the locking portion 8 and the locking receiver 9 may not have a locking mechanism.

[0047] Furthermore, in the bag 1 according to this embodiment, an example was shown in which a pair of shoulder belt structures 10 are provided on both sides in the left-right direction Y on the back surface 2a of the bag body 2. However, the shoulder belt structures 10 may be provided on either the left-right direction Y on the back surface 2a of the bag body 2, and the position in which the shoulder belt structures 10 are provided is arbitrary. [Explanation of Symbols]

[0048] 1 bag 2. Bag body (main body) 2a Back support surface 2b upper part 2c lower part 2d Reinforcement section 3. Belt section 4. Chest belt 4a Buckle 5. Shoulder strap (belt) 5a End (one end of the shoulder strap) 5b End (the other end of the shoulder strap) 6. Adjustment section (belt section) 6a One end (one end of the adjustment part) 6b Other end (the other end of the adjustment part) (the tip of the belt part) 7. Ring section 7a hole 8 Locking part 8a side buttons 9. Locking receiver 9a base 9b protrusion 9c Ring groove 10 Shoulder strap structure 10a Left shoulder strap structure 10b Right shoulder strap structure A1 direction A2 direction L1 Length L2 Length X vertical direction Y left / right direction

Claims

1. A shoulder strap structure provided in the main body of the bag where items are stored, A belt portion connected to the upper part of the main body, A locking receiving portion formed midway along the longitudinal direction of the belt portion, An annular portion formed at the lower part of the main body, It has a locking portion formed at the tip of the belt portion that passes through the annular portion, From a first state in which the belt portion is folded back at the annular portion and the locking portion is locked to the locking receiver, to a second state in which the locking portion is released from the locking receiver, the belt portion that was passed through the annular portion is pulled back in the opposite direction to the direction in which it was passed through the annular portion, and the locking portion is locked to the annular portion, the usable length, which is the length of the belt portion from the upper part to the annular portion, can be increased. A shoulder strap structure characterized by the following features.

2. The locking receiver is positioned to correspond to the chest of the user who is carrying the bag on their back with the belt portion slung over their shoulder. The shoulder belt structure according to feature 1.

3. A magnet is provided on either the locking receiving portion or the locking portion. An adsorbent body that is attracted to the magnet is provided on either the locking receiving portion or the other of the locking portion. The shoulder belt structure according to feature 1.

4. The locking receiver and the locking portion are provided with a locking mechanism for maintaining the first state. The shoulder belt structure according to feature 1.

5. The main body portion and the shoulder belt structure according to any one of claims 1 to 4 are provided. The main body has a back support surface which is the surface that comes into contact with the user's back when the garment is carried on the user's back. The aforementioned shoulder belt structure is provided in pairs on both sides in the width direction of the back support surface. A bag characterized by the following features.

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