Bag and method for manufacturing bag

Abstract

[Problem] To provide a bag with which it is possible to easily adjust the length of a strap even when the strap is hanging on the shoulder of a user. [Solution] A bag according to the present invention comprises a body section and a strap whose length can be adjusted, and is characterized in that: the strap is provided with a first hook string of which one is connected to the body section, a first annular member connected to another end of the first hook string, an operation member provided on the first annular member, a second annular member connected to the other end of the first hook string at a position closer to the one end of the first hook string than the first annular member, and a second hook string of which one end is connected to the body section and another end passes through the first annular member, then passes through the first annular member again after folding back around the second annular member; and the formation position of the folded back portion of the second hook string is moved to one end side of the second hook string as a result of another end being pulled, and is moved to the other end side of the second hook string as a result of the operation member being pulled in a direction away from the one end of the second hook string.

Description

Bag and method for manufacturing the bag

[0001] The present invention relates to a bag having a strap whose length can be easily adjusted, and a method for manufacturing the same.

[0002] Traditionally, bags with straps have used various adjustment mechanisms to adjust the longitudinal length of the strap. For example, a standard strap, often used in shoulder bags that are worn over the user's shoulder, is provided with an adjustment device that folds and holds one end of the strap, with a portion of the strap held doubled over. By changing the length of the folded portion of the strap, the longitudinal length of the entire strap can be adjusted.

[0003] Furthermore, for example, Patent Document 1 discloses a strap whose folded-back portion can be changed in length by operating an operating piece provided in the middle region of the strap. In a bag using this strap, when the strap is not under load, pulling the operating piece provided in the middle region of the strap pulls a portion of the strap out of the lock, and after the pulled-out strap portion overlaps the remaining portion of the strap, the operating piece and a hook-and-loop fastener provided at the end of the strap engage, allowing the strap to be held compactly in a shortened state.

[0004] JP 2009-165773 A

[0005] In the standard straps described above and the straps described in Patent Document 1, the overall length of the strap is adjusted by sliding an adjustment tool, such as a hook or a square hook, along the length of the strap. When sliding the adjustment tool along the strap, it is necessary to release the load on the strap and temporarily loosen the fastening state between the adjustment tool and the strap. Therefore, when the strap is connected to a bag or the like and the user is wearing the strap on their shoulder, for example, it can be difficult to adjust the length of the strap.

[0006] The present invention has been made to solve such problems, and aims to provide a bag that allows the user to easily adjust the length of the strap even when the strap is hanging from the shoulder.

[0007] In order to achieve this object, the bag according to the present invention is a bag comprising a main body and a strap provided with an adjustable length, the strap comprising: a first hanging cord having one end connected to a first connecting portion of the main body; a first annular member connected to the other end of the first hanging cord; an operating member provided on the first annular member at a position substantially opposite to the position at which the other end of the first hanging cord is connected; a second annular member connected to the other end of the first hanging cord at a position closer to the one end of the first hanging cord than the first annular member; and a second connecting portion having one end connected to a second connecting portion substantially opposite the first connecting portion of the main body. and a second hanging cord which, after its other end passes through the first annular member, forms a folded portion that folds back around a position on the second annular member that is approximately opposite to the position at which the other end of the first hanging cord is connected, and then passes through the first annular member again, wherein the second hanging cord is characterized in that, by pulling the other end of the second hanging cord, the position at which the folded portion is formed moves toward the one end of the second hanging cord, and, by pulling the operating member in a direction away from the one end of the second hanging cord, the position at which the folded portion is formed moves toward the other end of the second hanging cord.

[0008] According to the present invention, the overall length of the strap can be shortened by pulling the other end of the second strap, and can be lengthened by pulling the operating member, so the user can easily adjust the length of the strap even when the strap is hanging from their shoulder.

[0009] FIG. 1 is a front view of a bag according to one embodiment of the present invention. (A) A left side view of the bag according to one embodiment. (B) A front view of the bag according to one embodiment. (C) A right side view of the bag according to one embodiment. (A) A top view of the bag according to one embodiment. (B) A front view of the bag according to one embodiment. (C) A bottom view of the bag according to one embodiment. (A) A schematic view for explaining the operation of shortening the strap. (B) A partial cross-sectional view of the strap when shortening the strap. (A) A schematic view for explaining the operation of lengthening the strap. (B) A partial cross-sectional view of the strap when lengthening the strap.

[0010] A bag according to an embodiment of the present invention will be described below with reference to the drawings. The configuration described below is an example of the present invention, and the present invention is not limited thereto. Note that the drawings used in the following description may be partially enlarged or reduced for ease of explanation, and the size and proportions of each component are not limited to those shown. In this specification, the terms "upper" and "lower" refer to the upper and lower directions, respectively, in FIG. 1. Furthermore, the terms "front" and "rear" of the bag refer to the front and rear directions, respectively, of the paper in the drawing. Furthermore, the terms "left" and "right" of the bag refer to the left and right directions, respectively, in the drawing.

[0011] Fig. 1 is a front view showing a bag 1 according to one embodiment of the present invention. Also, Figs. 2 and 3 show left and right side views, a top view, and a bottom view of the bag 1. Also, Fig. 4 shows a perspective view of the bag 1. As shown in these drawings, the bag 1 includes a main body 10 and a strap 20.

[0012] <Configuration of main body 10> The main body 10 is a bag-shaped storage section with an opening at the top. The main body 10 can be made of any material, such as a woven fabric, knitted fabric, or nonwoven fabric made from natural or synthetic fibers, as well as resin, paper, natural leather, artificial leather, or synthetic leather. In the bag 1 of this embodiment, the main body 10 is made of a woven fabric made primarily from synthetic fibers such as nylon.

[0013] As shown in Figures 1 to 4, the main body 10 has a first side 10A and a second side 10B that are symmetrical along the longitudinal direction of the main body 10. These sides 10A and 10B are stacked facing each other and sewn together at their ends, excluding the top edge, to form a bag-like storage compartment. At the bottom of the main body 10, the left and right edges of the first side 10A and the second side 10B are folded inward and sewn three-dimensionally to form a gusseted bottom. As shown in Figure 4, openings are provided along the longitudinal direction at the upper edges of the first side 10A and the second side 10B. The openings are configured to be openable and closable using a known fastener or the like, and a lining (not shown) made of a different fabric from the first side 10A and the second side 10B is provided inside the storage compartment.

[0014] The side of the main body 10 has a shape in which the left and right upper ends protrude higher than the center when viewed from the front, and as described above, an opening is provided at the upper end of the main body 10 along an arc-shaped curved surface connecting the left and right upper ends and the center. At positions on both sides of the opening of the main body 10 in the longitudinal direction, i.e., at the left and right upper ends of the main body 10, a first connection portion 11 and a second connection portion 12 are provided that connect to a first hanging cord 21 and a second hanging cord 22 of the strap 20, which will be described later, respectively.

[0015] A locking portion 13 for locking the other end 22B of a second hanging cord 22 of the strap 20 (described later) is provided near the second connection portion 12 of the main body 10. The locking portion 13 may have any structure as long as it can lock the other end 22B of the second hanging cord 22. In the bag 1 of this embodiment, the locking portion 13 is a metal ring-shaped member such as a jump ring or a D-ring, and this ring-shaped member is connected to the main body 10 via a loop portion of a string member sewn to the main body 10.

[0016] The locking portion 13 not only locks the other end 22B of the second hanging cord 22 of the strap 20 to prevent it from coming loose, but also prevents the other end 22B of the second hanging cord 22 from moving freely and hitting people or objects when carrying the bag 1. Furthermore, when the locking portion 13 is an annular member as in this embodiment, it also functions as an attachment portion for attaching accessories such as key holders to the bag 1.

[0017] Additionally, the first side surface 10A and the second side surface 10B of the main body 10 are each provided with a side pocket 14 having an opening 15 on the second connecting portion 12 side. The opening 15 of the side pocket 14 is inclined from the side closest to the second connecting portion 12 toward the top of the main body 10 as it moves toward the first connecting portion 11 side, making it easy for the user to access the side pocket 14 even when the bag 1 is slung over the shoulder. The side pocket 14 can be used to store small items such as plastic drink bottles, smartphones, and folding umbrellas.

[0018] <Configuration of Strap 20> The strap 20 is a string member that extends in the longitudinal direction and functions as a shoulder strap that a user puts on their shoulder when carrying the bag 1. As will be described later, the strap 20 mainly includes a first hanging cord 21 that connects to the first connecting portion 11 of the main body 10, a second hanging cord 22 that connects to the second connecting portion 12 of the main body 10, a plurality of annular members (first annular member 23, second annular member 24) that connect the hanging cords 21, 22, and an operating member 25 used to adjust the length. As will be described later, the length of the strap 20 as a shoulder strap can be adjusted by pulling the other end 22B of the second hanging cord or the operating member 25 in a predetermined direction.

[0019] The strap 20 can be made of any material, such as a woven fabric, knitted fabric, or nonwoven fabric made from natural or synthetic fibers, as well as resin, paper, natural leather, artificial leather, or synthetic leather. The strap 20 may be made of the same material as the main body 10, or a different material. Different materials may be used for different sections of the strap 20. As described below, the second hanging cord 22 forms a folded portion 22C, and the length of the strap 20 as a shoulder strap can be adjusted by moving the position of this folded portion 22C. Therefore, the second hanging cord 22 is preferably made of a material that is strong and resistant to folding. In the bag 1 of this embodiment, the strap 20 is made of a combination of a woven fabric and a knitted fabric made from synthetic fibers such as nylon, acrylic, or polyester.

[0020] The following describes in detail the configuration of the strap 20. As shown in Figures 1 to 4, the strap 20 is mainly composed of a first hanging cord 21, a second hanging cord 22, a first annular member 23, a second annular member 24, and an operating member 25.

[0021] One end 21A of the first hanging cord 21 is connected to the first connection portion 11 of the main body 10. In the bag 1 of this embodiment, the first hanging cord 21 is a strip-shaped member made by overlapping and sewing together strips of synthetic fabric such as nylon. The one end 21A of the first hanging cord 21 is connected to the main body 10 by being sewn to the first side surface 10A and the second side surface 10B at the first connection portion 11 of the main body 10. Note that the connection structure between the one end 21A of the first hanging cord 21 and the first connection portion 11 of the main body 10 is not limited to the above. For example, the one end 21A and the first connection portion 11 may be connected via a detachable connecting member such as a hook or a carabiner, or the one end 21A and the first connection portion 11 may be integrally formed.

[0022] Furthermore, as will be described later, when a user wears the strap 20 over their shoulder, the first hanging cord 21 is always in contact with the user's shoulder, so the first hanging cord 21 is preferably made of a material and shape that can reduce the burden on the user's shoulder and is resistant to kinking. In the bag 1 of this embodiment, the width (length in the short direction) of the first hanging cord 21 is preferably at least twice the width of the second hanging cord 22. Furthermore, as is common in shoulder rests, a core material made of padding or spunlace, spunbond, synthetic fibers, natural fibers, or the like may be placed inside the first hanging cord 21.

[0023] A strip-shaped knitted fabric made of synthetic fiber such as acrylic or polyester is sewn to the other end 21B of the first hanging cord 21, and a loop is formed by the knitted fabric. A first annular member 23 and a second annular member 24 are passed through the loop of the other end 21B to connect them.

[0024] For example, rectangular frame-shaped metal members known as square rings can be used as the first annular member 23 and the second annular member 24. The first annular member 23 and the second annular member 24 may be made of the same material and shape, or may be made of different materials and shapes, but it is preferable that they be made of the same material and shape, as this allows for smooth adjustment of the length of the strap 20, which will be described later.

[0025] The second annular member 24 is located closer to the one end 21A of the first hanging cord 21 than the first annular member 23. That is, of the two annular members, the one located closer to the other end 21B of the first hanging cord 21 is the first annular member 23, and the one located closer to the one end 21A of the first hanging cord 21 is the second annular member 24. Furthermore, because the first annular member 23 and the second annular member 24 are both connected to a single loop on the other end 21B of the first hanging cord 21, the first annular member 23 and the second annular member 24 are held by the other end 21B of the first hanging cord in a partially overlapping state. In this case, the first annular member 23 and the second annular member 24 are arranged in an overlapping manner such that the second annular member 24 is always located above the first annular member 23.

[0026] An operating member 25 is provided on the side of the first annular member 23 opposite the side connected to the other end 21B of the first hanging cord 21. In the bag 1 of this embodiment, the operating member 25, like the other end 21B of the first hanging cord 21, is made of a strip-shaped knit fabric made of synthetic fibers such as acrylic or polyester. One end of the operating member 25 is fixed to the first annular member 23 by being folded back around one side of the first annular member 23 and then sewn together. The other end of the operating member 25 is sewn in a folded state to increase its thickness, thereby improving the durability and ease of gripping of the operating member 25. Note that the configuration of the operating member 25 is not limited to the above and may be any configuration that can be connected to the first annular member 23 and can withstand repeated operation. For example, the operating member 25 may be made of any material, such as resin, metal, or leather, and may have any shape, such as a plate, ring, or thin string.

[0027] One end 22A of the second hanging cord 22 is connected to the second connection portion 12 of the main body 10. In the bag 1 of this embodiment, the second hanging cord 22, like the other end 21B of the first hanging cord 21, is made of a strip-shaped knit fabric made of synthetic fibers such as acrylic or polyester. One end 22A of the second hanging cord 22 is connected to the main body 10 by being sewn to the first side surface 10A and the second side surface 10B at the second connection portion 12 of the main body 10. Here, the width (length in the short direction) of the second hanging cord 22 is shorter than the width of the first hanging cord 21 that abuts against the user's shoulder, thereby reducing friction between the second hanging cord 22 and various components when adjusting the length of the strap 20. Note that the connection structure between the one end 22A of the second hanging cord 22 and the second connection portion 12 of the main body 10 is not limited to the one described above. For example, the structure may be such that one end 22A and the second connection portion 12 are connected via a detachable connecting member such as a hook or carabiner, or the structure may be such that one end 22A and the second connection portion 12 are integrally formed.

[0028] After passing through the first annular member 23, the other end 22B of the second hanging cord 22 is passed through the second annular member 24, where it is folded back around the edge of the second annular member 24 opposite the edge where it is connected to the other end 21B of the first hanging cord 21, forming a folded-back portion 22C, and then routed so as to pass through the first annular member 23 again. Because the first annular member 23 and the second annular member 24 are arranged such that the second annular member 24 is located above the first annular member 23, the other end 22B of the second hanging cord 22 passes through the first annular member 23 and the second annular member 24 in an upward direction, folds back at the folded-back portion 22C, and then passes through the first annular member 23 in an upward direction.

[0029] The other end 22B, which passes from top to bottom through the first annular member 23, then passes downward along the one end 22A of the second hanging cord 22 and the main body 10, and is passed from top to bottom through the locking portion 13. A locking protrusion 28 that can be locked by the locking portion 13 is provided at the tip of the other end 22B of the second hanging cord 22, and when the other end 22B of the second hanging cord 22 is pulled upward, the locking protrusion 28 is locked into the locking portion 13, thereby functioning to prevent the second hanging cord 22 from slipping out.

[0030] Additionally, a tab 27 is provided at the tip of the other end 22B of the second hanging cord 22 to make it easier to grip the other end 22B when adjusting the length of the strap 20, as described below. The tab 27 and the locking projection 28 may have any configuration as long as they can perform their respective functions, but in this embodiment, the tab 27 and the locking projection 28 are formed by folding back the tip of the other end 22B and pinching and stitching it.

[0031] Additionally, a ring-shaped retaining member 26 is provided below the folded-back portion 22C where the one end 22A and the other end 22B of the second hanging cord 22 overlap, to hold the second hanging cord 22 in the overlapped state. The retaining member 26 restricts the free movement of the other end 22B of the second hanging cord 22, thereby preventing the other end 22B from hitting or getting caught on a person or object, and also functions as a second stopper to prevent the other end 22B from coming off the folded-back portion 22C if the other end 22B of the second hanging cord 22 comes off the engaging portion 13 (or is intentionally released). In addition, the retaining member 26 also has the function of preventing the second hanging cord 22 from twisting or bending, and when the retaining member 26 is adjusted to be positioned near the second annular member 24, it also has the function of preventing the second hanging cord 22 from bending or twisting at the folded portion 22C of the second annular member 24 even when no load is applied to the second hanging cord 22.

[0032] Due to the structure of the folded portion 22C of the second hanging strap 22 described above, when a user carries the bag 1 on their shoulder, a downward load is applied to the folded portion 22C of the second hanging strap 22. As a result, the second hanging strap 22 folded at the folded portion 22C is sandwiched between the second annular member 24 and the first annular member 23 (and the operating member 25), and the position of the folded portion 22C is fixed and stabilized.

[0033] Even if a heavy object is placed in the bag 1 and a large downward load is applied to the folded-back portion 22C of the second hanging cord 22, the force with which the second annular member 24 and the first annular member 23 (operating member 25) clamp the second hanging cord 22 also increases, thereby preventing the one end 22A of the second hanging cord 22 from sliding downward. In other words, when a downward pulling force is applied to the one end 22A of the second hanging cord 22, the reaction force generated in the second annular member 24 (force directed toward the first annular member 23) and the reaction force generated in the first annular member 23 (force directed toward the second annular member 24) face each other to clamp and secure the second hanging cord 22, preventing the position of the folded-back portion 22C from changing unexpectedly due to the weight of the object.

[0034] With the above-described configuration, in the bag 1 of this embodiment, when a user carries the bag 1 over their shoulder, the length of the strap 20 as a shoulder strap is the sum of the length of the first hanging cord 21 and the length from one end 22A of the second hanging cord 22 to the folded-back portion 22C (for convenience, the lengths of the first annular member 23 and the second annular member 24 will not be taken into consideration).

[0035] <Length Adjustment Mechanism for Strap 20> As described above, with the bag 1 of this embodiment, the length of the strap 20 as a shoulder strap is determined by the fixed-length first hanging cord 21 and the variable-length second hanging cord 22, and therefore the length of the strap 20 as a shoulder strap can be adjusted by changing the position of the folded-back portion 22C of the second hanging cord 22. In other words, the closer the folded-back portion 22C of the second hanging cord 22 is positioned to one end 22A, the shorter the length of the strap 20 as a shoulder strap, and the closer the folded-back portion 22C is positioned to the other end 22B, the longer the length of the strap 20 as a shoulder strap.

[0036] When the other end 22B of the second hanging cord 22 is passed through the locking portion 13, the length of the strap 20 when the locking projection 28 of the other end 22B is in a position where it is locked to the locking portion 13 becomes the maximum length as a shoulder strap, but if it is desired to make the length of the strap 20 as a shoulder strap even longer, the other end 22B can be used by removing it from the locking portion 13. In this case, the length of the strap 20 when the locking projection 28 of the other end 22B is in a position where it is locked to the holding member 26 near the folded portion 22C becomes the maximum length as a shoulder strap.

[0037] The length adjustment mechanism for the strap 20 in the bag 1 of this embodiment will now be described. Fig. 5(A) is a schematic diagram illustrating the operation of shortening the length of the strap 20 as a shoulder strap, and Fig. 5(B) is a partial cross-sectional view of the strap 20 at that time. As shown in Fig. 5(A), with the bag 1 of this embodiment, while the strap 20 is being carried over the user's shoulder, the length of the strap 20 can be easily shortened by pulling downward on the other end 22B of the second hanging cord 22 of the strap 20.

[0038] 5(B), when the user pulls downward on the tab 27 of the other end 22B of the second hanging cord 22, the one end 22A of the second hanging cord 22 is pulled upward, with one side of the second annular member 24 on which the folded-back portion 22C is formed as a fulcrum. When the other end 22B of the second hanging cord 22 is pulled downward, the force acting to pinch the second hanging cord 22 between the second annular member 24 and the first annular member 23 (operating member 25) is small, so the user can pull down the other end 22B with a small force, which moves the position where the folded-back portion 22C is formed toward the one end 22A and shortens the length of the strap 20.

[0039] Next, Fig. 6(A) is a schematic diagram for explaining the operation of lengthening the length of the strap 20 as a shoulder strap, and Fig. 6(B) is a partial cross-sectional view of the strap 20 at that time. As shown in Fig. 6(A), with the bag 1 of this embodiment, when the strap 20 is carried over the user's shoulder, the length of the strap 20 can be easily adjusted by pulling the operating member 25 of the strap 20 in a direction away from the one end 22A of the second hanging cord 22.

[0040] As shown in Figure 6(B), when a user pulls the operating member 25 of the second hanging cord 22 in a direction away from one end 22A of the second hanging cord 22, one side of the first annular member 23 to which the operating member 25 is connected is lifted upward, and accordingly, the side of the second annular member 24 on which the folded portion 22C is formed is also lifted upward. This loosens the clamping force on the second hanging cord 22 between the second annular member 24 and the first annular member 23 (operating member 25). In this state, by further pulling the operating member 25, the other end 22B of the second hanging cord 22, which is not fixed, is pulled upward, thereby moving the position of the folded portion 22C toward the other end 22B. In this way, the user can pull the operating member 25 with little force, thereby easily lengthening the strap 20.

[0041] As described above in detail, in the bag 1 of this embodiment, the strap 20 comprises the first hanging cord 21 having one end 21A connected to the first connecting portion 11 of the main body 10, the first annular member 23 connected to the other end 21A of the first hanging cord 21, the operating member 25 provided at a position on the first annular member 23 substantially opposite to the position at which the other end 21B of the first hanging cord 21 is connected, and the first annular member 23 at a position closer to the one end 21A of the first hanging cord 21 than the first annular member 23. The second hanging cord 22 includes a second annular member 24 connected to the other end 21B of the hanging cord 21, and a second hanging cord 22 having one end 22A connected to the second connection portion 12 that is substantially opposite the first connection portion 11 of the main body 10 and the other end 22B passing through the first annular member 23, forming a folded-back portion 22C that folds back around a position on the second annular member 24 that is substantially opposite the position at which the other end 21B of the first hanging cord 21 is connected, and then passing through the first annular member 23 again. By pulling the other end 22B of the second hanging cord 22, the position at which the folded-back portion 22C is formed moves toward the one end 22A of the second hanging cord 22, and by pulling the operating member 25 in a direction away from the one end 22A of the second hanging cord 22, the position at which the folded-back portion 22C is formed moves toward the other end 22B of the second hanging cord 22.

[0042] As a result, the length of the strap 22 as a shoulder strap can be shortened by pulling the other end 22B of the second hanging cord 22, and the length of the strap 20 as a shoulder strap can be lengthened by pulling the operating member 25. Therefore, even when the user has the strap 20 hanging from their shoulder, the length of the strap 20 can be easily adjusted.

[0043] Furthermore, a locking portion 13 for locking the other end 22B of the second hanging cord 22 is provided near the second connecting portion 12 of the main body 10, so that the other end 22B can be locked by the locking portion 13 to function as a retainer and prevent the other end 22B from moving freely and hitting people or objects. Furthermore, particularly when the locking portion 13 is formed of a ring member, it can also function as an attachment portion for attaching accessories such as key holders to the bag 1.

[0044] In addition, in this embodiment, the locking portion 13 is a ring-shaped member, and a locking protrusion 27 that can be locked by the locking portion 13 is provided at the tip of the other end 22B of the second hanging cord 22.Therefore, by locking the locking protrusion 27 with the locking portion 13, the second hanging cord 22 can be easily and effectively prevented from coming loose.

[0045] The second hanging cord 22 is provided with a ring-shaped retaining member 26 that holds the folded second hanging cord 22 at the folded-back portion 22C in an overlapping state. The retaining member 26 restricts the free movement of the other end 22B of the second hanging cord 22, preventing the other end 22B from hitting or getting caught on a person or object. The retaining member 26 also functions as a second stopper to prevent the other end 22B from coming loose from the folded-back portion 22C. Furthermore, when adjusting the length of the strap 20 with the other end 22B of the second hanging cord 22 disengaged from the locking portion 13, the user feels a slight resistance when the locking protrusion 28 on the other end 22B of the second hanging cord 22, which is pulled upward as the strap 20 is extended, comes into contact with the retaining member 26. Therefore, by aligning the position of the retaining member 26 with the desired position on the strap 20, the retaining member 26 can function as a stopper when adjusting the length of the strap 20.

[0046] Furthermore, in the bag 1 of this embodiment, both the operating member 25 that the user operates when adjusting the length of the strap 20 and the other end 22B of the second hanging cord 22 are positioned closer to one end 22A of the second hanging cord 22 than to one end 21A of the first hanging cord 21, so the user can easily adjust the length of the strap 20 without having to move and adjust the position of the main body 10 or the strap 20 beforehand.

[0047] In addition, a knob portion 27 formed to have a thickness greater than that of other portions of the second hanging cord 22 is provided at the tip of the other end portion 22B of the second hanging cord 22, making it easy for the user to hold the other end portion 22B when shortening the length of the strap 20.

[0048] Furthermore, since the main body 10 has at least a first side surface 10A and a second side surface 10B that are generally aligned along the longitudinal direction of the main body 10, and the first side surface 10A and the second side surface 10B each have a bag-shaped side pocket 14 with an opening 15 on the side of the second connecting portion 12, the side pocket 14 can be easily accessed by the user regardless of whether the first side surface 10A or the second side surface 10B of the main body 10 faces outward (the side farther from the user's body) depending on how the user wears the strap 20 (over the left or right shoulder). Furthermore, for example, the side pocket 14 of the first side surface 10A or the second side surface 10B of the main body 10 that faces inward (the side closer to the user's body) depending on how the user wears the strap 20 can also be used as a storage section for storing the other end 22B of the second hanging cord 22.

[0049] In addition, the opening 15 of the side pocket 14 is inclined toward the top of the main body 10 as it moves from the side closest to the second connection part 12 toward the side of the first connection part 11, so that the user can easily access the side pocket 14 when the bag 1 is slung over their shoulder.

[0050] Furthermore, in the bag 1 of this embodiment, the lengths of the first hanging strap 21 and the second hanging strap 22 are adjusted so that the first hanging strap 21 accounts for approximately 50% or more of the total length of the strap 20 as a shoulder strap. This configuration allows the first hanging strap 21, rather than the second hanging strap 22, to always be in contact with the user's shoulder. The first hanging strap 21 is made of a softer material than the second hanging strap 22 and is wider, thereby reducing the burden on the user's shoulder. Furthermore, when the user wears the bag 1 on their shoulder, the second hanging strap 22 is positioned in front of the user's body. Therefore, even if the second hanging strap 22 is operated to adjust the length of the strap 20, the position of the first hanging strap 21 in contact with the user's shoulder does not change. This eliminates the need to adjust the fit of the strap 20 on the shoulder each time the length of the strap 20 is adjusted, making the length of the strap 20 more convenient and easy to adjust.

[0051] The above-described embodiments are merely examples for explaining the present invention, and are not intended to limit the present invention to these embodiments. The present invention can be embodied in various forms without departing from the spirit of the present invention. For example, although the embodiments have been described as applying the present invention to a shoulder bag worn over one shoulder of a user, the present invention can also be applied to bags such as backpacks worn over both shoulders of a user.

[0052] The strap structure of the present invention can also be applied to items other than bags that use straps. For example, the strap structure of the present invention can be applied to cameras, water bottles, smartphone cases, musical instruments such as guitars, or musical instrument cases. When the strap of the present invention is applied to these items, the effect of being able to easily adjust the length of the strap while the user is wearing it on their shoulder can also be achieved.

[0053] REFERENCE SIGNS LIST 1 Bag 10 Main body 10A First side surface 10B Second side surface 11 First connection portion 12 Second connection portion 13 Locking portion 14 Side pocket 15 Side pocket opening 20 Strap 21 First hanging cord 21A One end of first hanging cord 21B Other end of first hanging cord 22 Second hanging cord 22A One end of second hanging cord 22B Other end of second hanging cord 22C Folded portion of second hanging cord 23 First annular member 24 Second annular member 25 Operating member 26 Holding member 27 Knob portion 28 Locking projection

Claims

1. A bag comprising a main body and a strap with an adjustable length, the strap comprising: a first hanging cord, one end of which is connected to a first connecting part of the main body; a first annular member connected to the other end of the first hanging cord; an operating member provided on the first annular member at a position substantially opposite the position at which the other end of the first hanging cord is connected; a second annular member connected to the other end of the first hanging cord at a position closer to the one end of the first hanging cord than the first annular member; and a second hanging cord, one end of which is connected to a second connecting part substantially opposite the first connecting part of the main body, and the other end of which passes through the first annular member, forming a folded part that turns back around a position on the second annular member substantially opposite the position at which the other end of the first hanging cord is connected, and then passes through the first annular member again; the second hanging cord a bag characterized in that, by pulling the other end of the second hanging cord, a formation position of the folded-back portion moves toward the one end of the second hanging cord, and, by pulling the operating member in a direction away from the one end of the second hanging cord, a formation position of the folded-back portion moves toward the other end of the second hanging cord.

2. The bag according to claim 1, wherein the width of the first hanging strap is greater than the width of the second hanging strap.

3. The bag according to claim 1, characterized in that a fastening portion for fastening the other end of the second hanging cord is provided near the second connecting portion of the main body portion.

4. The bag according to claim 3, characterized in that the locking portion is a ring-shaped member, and the tip of the other end of the second hanging cord is provided with a locking protrusion that can be locked by the locking portion.

5. The bag according to claim 1, characterized in that the second hanging cord is provided with a ring-shaped holding member that holds the second hanging cord folded back by the folding portion in an overlapping state.

6. The bag described in claim 1, characterized in that both the operating member and the other end of the second hanging cord are positioned closer to the one end of the second hanging cord than to the one end of the first hanging cord.

7. The bag according to claim 1, characterized in that the tip of the other end of the second hanging cord is provided with a gripping tab portion that is thicker than the other portions of the second hanging cord.

8. The bag according to claim 1, characterized in that the main body has at least a first side surface and a second side surface that are generally aligned along the longitudinal direction of the main body, and the first side surface and the second side surface each have a bag-shaped side pocket with an opening on the side of the second connecting portion.

9. The bag according to claim 8, wherein the opening of the side pocket is inclined from the side closest to the second connecting portion toward the top of the main body portion as it moves toward the first connecting portion.

10. A method for manufacturing a bag having a main body and a strap with an adjustable length, comprising the steps of: arranging a first hanging cord, one end of which is connected to a first connecting portion of the main body; arranging a first annular member connected to the other end of the first hanging cord; arranging an operating member on the first annular member at a position substantially opposite to the position at which the other end of the first hanging cord is connected; and arranging a second annular member connected to the other end of the first hanging cord at a position closer to the one end of the first hanging cord than the first annular member. a second hanging cord, one end of which is connected to a second connection portion that is substantially opposite the first connection portion of the main body portion and the other end of which passes through the first annular member, and which forms a folded portion that folds back around a position on the second annular member that is substantially opposite the position at which the other end of the first hanging cord is connected, and then passes through the first annular member again, wherein pulling the other end of the second hanging cord moves the formed position of the folded portion toward the one end of the second hanging cord, and pulling the operating member in a direction away from the one end of the second hanging cord moves the formed position of the folded portion toward the other end of the second hanging cord.

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