JP6984095B1 - Bag shoulder strap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shoulder strap for a bag which can be quickly and compactly stored and can be easily replaced with various bags. SOLUTION: A case including a first connecting tool, a winding core portion rotatably provided in the case, and a second connecting tool provided at one end exposed from the case and the other end. The string portion whose portion is fixed to the winding core portion, the first position where the portion engages with the winding core portion, and the second position where the portion is disengaged from the winding core portion. A shoulder strap for a bag that is movable between and has a locking mechanism that is engageable with the case. [Selection diagram] Fig. 3

Description

The present invention relates to a bag shoulder strap used in connection with a bag or the like.

In recent years, with the spread of smartphones, tablets, laptop computers, and the enhancement of communication infrastructure such as Wifi and optical fiber, the number of people carrying multiple mobile devices and their accessories is increasing. Also, among commuter to commercial areas where there are many train trips, carry multiple bags, such as putting a bag in the bag, and wear a small bag containing only a specific mobile device and its accessories. It is becoming more and more popular to use different bags depending on the situation, such as putting a large bag in a locker.

When carrying a bag, especially when carrying a small bag in another large bag, the strap attached to the bag gets in the way. Since the shoulder strap of the bag has a certain length, it is difficult to store it compactly, and it comes with metal fittings for adjusting the length, so it is often difficult to carry. Further, the conventional strap length adjusting metal fitting has a problem that the strap length adjusting range is narrow.

As a conventional technique for compactly storing a strap when the bag is not hung on the shoulder, for example, a technique for winding the strap in a section provided in a bag has been proposed (see Patent Document 1 and the like). However, since the end of the conventional retractable strap is fixed to the bag, there is a problem that the bag itself becomes large.

Registered Utility Model No. 3214433 Gazette

The present invention has been made to solve such a problem, and provides a shoulder strap for a bag that can be quickly and compactly stored and can be easily replaced with various bags.

The shoulder strap for a bag according to the present invention is
A case with a first connector and
A winding core portion rotatably provided in the case and
A string portion that is provided with a second connecting tool at one end exposed from the case and the other end is fixed to the winding core portion.
It is movable between the first position where it engages with the take-up core and the second position where it is disengaged with the take-up core, and it can engage with the case. It has a locking mechanism.

The bag shoulder strap according to the present invention can be easily replaced with various bags by connecting the first connecting tool and the second connecting tool to both ends of the bag. In addition, since the string portion is wound around the winding core portion inside the case, it can be stored quickly and compactly. Further, the length of the string portion can be freely adjusted in a wide range by switching the lock / unlock of the take-up core portion by the lock mechanism.

Further, for example, the shoulder strap for a bag according to the present invention may be housed in the case and may have a spring that urges the winding core portion in the rotational direction.
In a state where the locking mechanism is moved to the second position, the winding core portion may be rotated by the urging force of the spring, and the string portion may be wound around the winding core portion.

Such a shoulder strap for a bag can be stored more quickly and compactly because the string portion is automatically wound around the winding core portion by releasing the lock mechanism.

Further, for example, the winding core portion is detachable from the string portion fixing portion to which the other end portion of the string portion is fixed and the string portion fixing portion, and is the outer peripheral side end of the spring. It may have a power engaging portion with which the portions engage.

In such a bag shoulder strap, the string used for the bag shoulder strap can be easily replaced by exchanging the string fixing portion. Therefore, for example, you can use the string part of your favorite design according to the bag or clothes.

Further, for example, the lock mechanism may be arranged at a substantially center position of the winding core portion when viewed from the rotation axis direction of the winding core portion.
The locking mechanism includes a push shaft portion whose one end is exposed from the case, and at least two engaging protrusion portions housed in the case and projecting radially from the other end portion of the push shaft portion. And may have,
The locking mechanism may be movable along the direction of the axis of rotation.
At least two engagement recesses in the radial direction with which the engagement protrusions at the first position can be engaged may be formed in the central portion of the winding core portion.

Since such a locking mechanism is arranged at a substantially center position of the winding core portion, the winding core portion can be reliably locked. Further, since a plurality of engaging protrusions and engaging recesses are formed, the load applied to the engaging protrusions at the time of locking is reduced, and the load capacity and durability are good. Further, by arranging the lock mechanism at a substantially center position of the winding core portion, the shoulder strap for the bag including the case can be further miniaturized.

Further, for example, the lock mechanism may have an axial urging spring that urges the winding core portion in the rotation axis direction.
The locking mechanism may be movable along the direction of the axis of rotation.
The axial urging spring may urge the locking mechanism to the first position.

Since the lock mechanism of such a shoulder strap for a bag is urged to the first position by an axial urging spring, it is possible to prevent a malfunction due to forgetting to lock. Further, since the operator basically only needs to push the lock mechanism when adjusting or storing the length of the string portion, such a shoulder strap for a bag is very simple and has excellent operability.

Further, for example, the case may have a first case portion and a second case portion that can be separated from each other in the rotation axis direction of the winding core portion.
The winding core portion may be sandwiched between the first case portion and the second case portion and housed in the case.

Since the case has a first case portion and a second case portion that can be separated from each other in the rotation axis direction, such a shoulder strap for a bag can be easily disassembled and assembled.

Further, for example, the locking mechanism is provided with an axially urging spring that urges the winding core portion in the rotation axis direction.
Inside the case, a spring receiving shaft that protrudes from the first case portion in the rotation axis direction and supports the axial urging spring at the tip thereof may be provided.
The axial urging spring may press the locking mechanism against the second case portion to urge the first position.

With such a structure of the spring receiving shaft and the case, the lock mechanism at the substantially center position of the winding core portion can be urged to the first position with a simple structure. Therefore, such a structure of the spring bearing shaft and the case contributes to the miniaturization and the improvement of the durability of the shoulder strap for the bag.

FIG. 1 is a schematic view of a shoulder strap for a bag according to the first embodiment of the present invention. FIG. 2 is a schematic view showing a state in which the string portion is pulled out in the bag shoulder strap shown in FIG. FIG. 3 is a conceptual diagram showing a usage state of the shoulder strap for a bag shown in FIG. FIG. 4 is an exploded perspective view of the shoulder strap for a bag shown in FIG. FIG. 5 is a perspective view showing a spring and a power engaging portion in the shoulder strap for a bag shown in FIG. FIG. 6 is a perspective view showing a state in which the second case portion is removed from the bag shoulder strap shown in FIG. FIG. 7 is a partially assembled view showing an axially urging spring, a spring receiving shaft, and the like in the shoulder strap for a bag shown in FIG. FIG. 8 is a conceptual diagram showing a moving state of the locking mechanism in the shoulder strap for a bag shown in FIG.

FIG. 1 is a schematic view of a back shoulder strap 10 (hereinafter, also simply referred to as “strap 10”) according to an embodiment of the present invention. As shown in FIG. 1, the strap 10 has a case 20, a first connecting tool 22, a string portion 40, a second connecting tool 45, a locking mechanism 50, and the like.

FIG. 2 is a schematic view showing a state in which the string portion 40 is pulled out from the strap 10 shown in FIG. As shown in FIG. 2, the strap 10 is used by pulling out the string portion 40 from the case 20. Inside the case 20, a winding core portion 30 (see FIG. 4) for winding the string portion 40 is housed, and the string portion 40 is wound around the winding core portion 30 inside the case 20 and inside the case 20. Is housed in.

FIG. 3 is a conceptual diagram showing an example of the usage state of the strap 10. As shown in FIG. 3, the strap 10 is used by being attached to the bag main body 90. The strap 10 is used by connecting the first connecting tool 22 and the second connecting tool 45 to the ring-shaped strap attaching portion 92 in the bag main body portion 90. The size and weight of the bag body 90 to which the strap 10 is attached are not particularly limited, but the size of the bag is assumed to be about 10 to 50 cm in length on the long side and about 0.1 to 10 kg in weight. To.

As shown in FIG. 3, by stretching the strap portion 40 of the strap 10, the strap 10 can be used as a shoulder strap of the bag main body portion 90. The first connecting tool 22 and the second connecting tool 45 included in the strap 10 are preferably composed of an openable / closable hook or the like so that they can be easily connected to the strap attachment portion 92 provided in the bag main body portion 90. .. For example, examples of the first connecting tool 22 and the second connecting tool 45 include a snap hook, a D hook, a Naskan, and a carabiner.

Further, the materials of the first connecting tool 22 and the second connecting tool 45 are not particularly limited, and metal, plastic, or the like can be adopted. The strap 10 can be easily replaced with various bags and used, and the length of the string portion 40 can be freely adjusted. Therefore, the strap 10 is not limited to simply being a convenient shoulder strap that is attached to and used by a specific bag body 90. The strap 10 is used by attaching the strap 10 to the main body of a large bag when carrying a plurality of bags in a state such as a bag-in-bag, and for a small bag, the strap 10 is large without a strap. Store it compactly in the bag. When using a small bag, the strap 10 is replaced with the large bag. The use of the strap 10 facilitates new usage styles for such bags. That is, since the strap 10 can be replaced with various bag body 90s by holding only one strap 10, it is very efficient to carry the luggage in a bag-in-bag state. It will be convenient and convenient. Hereinafter, the structure of the strap 10 will be described in more detail.

FIG. 4 is an exploded perspective view of the strap 10. As shown in FIG. 4, the strap 10 has a case 20 including a first connecting tool 21, a lock mechanism 50, a winding core portion 30, and a string portion 40. Further, the strap 10 has an axial urging spring 70, a spring receiving shaft 80, and a spring 60 (see FIG. 5).

As shown in FIGS. 1 and 2, the case 20 has a short, substantially cylindrical outer shape, and a first connector 22 is attached to the side surface of the case 20. As shown in FIG. 4, the case 20 has a first case portion 24 and a second case portion 26 that are separable from each other in the rotation axis direction D1 of the winding core portion 30.

The first case portion 24 has a substantially bottomed cylindrical outer shape, and the substantially disk-shaped second case portion 26 serves as a lid for the first case portion 24. As shown in FIG. 4, at least a part of the winding core portion 30, the string portion 40, and the locking mechanism 50 is sandwiched between the first case portion 24 and the second case portion 26, and is contained in the case 20. Be housed.

It is preferable that the first case portion 24 and the second case portion 26 are detachable due to an engaging or fitting structure or a screwing structure. By making the first case portion 24 and the second case portion 26 detachable, the user can disassemble the case 20 and freely replace the string portion 40 and the like.

An opening 24a through which the string portion 40 is inserted is formed on the side surface of the first case portion 24. Further, a recess 25 for fixing the spring receiving shaft 80 is formed in the inner bottom portion of the first case portion 24. Further, inside the second case portion 26, a rotation stop protrusion 28 for stopping the rotation of the lock mechanism 50 is formed.

The first case portion 24 and the second case portion 26 can be manufactured by, for example, resin molding or metal processing, but the material of the case 20 is not limited to metal or resin.

As shown in FIG. 4, the winding core portion 30 is rotatably provided in the case 20. The take-up core portion 30 is configured by combining a string portion fixing portion 32 to which the other end 44 of the string portion 40 is fixed and a power engaging portion 34 that is detachable from the string portion fixing portion 32. To.

As shown in FIG. 4, the string portion fixing portion 32 has a substantially ring-shaped shape. In the strap 10, the winding core portion 30 rotates around the spring receiving shaft 80, so that the string portion 40 is wound around the outer periphery of the string portion fixing portion 32, and the string portion 40 is housed in the case 20. .. On the inner peripheral surface of the string portion fixing portion 32, a connecting groove 33 that fits into the connecting projection 35 formed on the outer peripheral surface of the power engaging portion 34 is formed.

The power engaging portion 34 has a substantially cylindrical outer shape, and a connecting projection 35 is formed on the outer peripheral surface. The power engaging portion 34 is fitted and fixed to the inside of the string portion fixing portion 32, and is used in a state where the string portion fixing portion 32 and the power engaging portion 34 are integrated. FIG. 5 is a schematic perspective view of the power engaging portion 34 shown in FIG. 4 as viewed from the direction opposite to that of FIG. 4 (first case portion 24 side).

As shown in FIG. 5, the power engaging portion 34 is engaged with the outer peripheral side end portion 62 of the mainspring 60. The mainspring 60 is arranged on the inner peripheral side of the power engaging portion 34 and on the first case portion 24 side, and the inner peripheral side end portion 64 of the mainspring spring 60 is the base portion 84 of the spring receiving shaft 80. Is engaged in. In this way, the mainspring 60 is housed in the central portion of the winding core portion 30 in the case 20, and urges the winding core portion 30 in the rotational direction.

In the mainspring 60, the amount of elastic deformation increases when the string portion 40 shown in FIG. 4 is pulled out from the case 20, and the force is accumulated in the mainspring 60. As will be described later, when the lock mechanism 50 moves to the second position P2 (see FIG. 7), the winding core portion 30 is unlocked. When the lock of the winding core portion 30 is released, the winding core portion 30 is rotated by the urging force of the spring 60 shown in FIG. 5, and the string portion 40 is wound around the winding core portion 30.

As shown in FIG. 4, a partition plate 38 for partitioning the space inside the power engaging portion 34 is formed near the center of the power engaging portion 34 in the rotation axis direction D1. The partition plate 38 extends in a direction substantially orthogonal to the rotation axis direction D1 to prevent the arrangement of the mainspring 60 shown in FIG. 5 from shifting toward the second case portion 26.

A central hole 38a through which the spring receiving shaft 80 is inserted is formed in the center of the substantially circular flat plate-shaped partition plate 38. The inner diameter of the central hole 38a is formed to be slightly larger than the outer diameter of the spring receiving shaft 80, and the power engaging portion 34 can rotate relative to the spring receiving shaft 80.

As shown in FIG. 4, an engaging receiving portion 37 and an engaging recess 36 are formed on the inner peripheral side of the power engaging portion 34 and the end surface on the second case portion 26 side. At least two (four in the embodiment) engaging recesses 36 are formed in the central portion of the winding core portion 30 when viewed from the rotation axis direction D1.

As shown in FIGS. 4 and 6, the four engaging recesses 36 are formed in the radial direction with respect to the spring receiving shaft 80. Further, the four engaging recesses 36 are formed between the engaging receiving portions 37 protruding inward from the outer periphery of the power engaging portion 34. As will be described later, the engaging protrusion 54 of the lock mechanism 50 at the first position P1 (see FIG. 8) can be engaged with the engaging recess 36, and the engaging protrusion 54 of the lock mechanism 50 can be engaged. By engaging with the engaging recess 36, the rotation of the winding core portion 30 is prevented. On the other hand, when the lock mechanism 50 is in the second position P2 (see FIG. 8), the engagement protrusion 54 of the lock mechanism 50 and the engagement recess 36 and the engagement receiving portion 37 of the winding core portion 30 rotate. Since the positions of the axial directions D1 do not match, the take-up core portion 30 can rotate relative to the lock mechanism 50, the case 20, and the spring receiving shaft 80.

As shown in FIG. 4, the string portion 40 includes a second connecting tool 45 at one end portion 42 exposed from the case 20. The other end 44 of the string portion 40 is fixed to the string portion fixing portion 32 in the take-up core portion 30. The material of the string portion 40 is not particularly limited, but for example, a band formed of resin, cloth, leather, or the like can be used as the string portion 40. The length of the string portion 40 is not particularly limited, but may be, for example, about 50 to 150 cm.

As shown in FIG. 4, since the string portion fixing portion 32 and the power engaging portion 34 are detachable, the integrated string portion fixing portion 32 and the string portion 40 are attached to the power engaging portion 34. On the other hand, in the strap 10, the string portion 40 can be easily replaced with another one. As a result, the user of the strap 10 can select the desired string portion 40 according to the situation in which the strap 10 is used and the like, and set it in the case 20 by himself / herself.

As shown in FIGS. 1 and 4, the lock mechanism 50 is arranged in the case 20 at a substantially center position of the winding core portion 30 when viewed from the rotation axis direction D1 of the winding core portion 30. As shown in FIG. 4, the lock mechanism 50 has a push shaft portion 52 whose one end is exposed from the case 20, and a push shaft portion 52 housed in the case 20 and radially protrudes from the other end of the push shaft portion 52. It has at least two (four in the embodiment) engaging projections 54.

FIG. 6 is a schematic view showing a state in which the second case portion 26 of the case 20 is removed from the members constituting the strap 10. As shown in FIG. 6, the engaging protrusion 54 in the lock mechanism 50 is formed corresponding to the engaging recess 36 in the winding core portion 30.

FIG. 7 is a schematic view showing a state in which the lock mechanism 50 is further removed from the state shown in FIG. As shown in FIG. 7, an axial urging spring 70 that urges the lock mechanism 50 in the rotation axis direction D1 is installed at the tip 82 of the spring receiving shaft 80. As can be understood from FIG. 4, the spring receiving shaft 80 has a mounting surface 86 fixed to the recess 25 of the first case portion 24, and a base portion 84 and a tip 82 protruding from the mounting surface 86 in the rotation axis direction D1.

As shown in FIG. 4, the spring receiving shaft 80 projects from the first case portion 24 in the rotation axis direction D1 inside the case 20, and the tip 82 supports the axial urging spring 70. At the other end of the push shaft portion 52 in the lock mechanism 50 shown in FIG. 6, a bottomed hole portion (not shown) into which the tip 82 of the axial urging spring 70 and the spring receiving shaft 80 shown in FIG. 7 is inserted. ) Is formed.

As shown in FIG. 6, the lock mechanism 50 attached to the tip 82 of the spring receiving shaft 80 is pressed against the second case portion 26 by the axial urging spring 70 shown in FIGS. 4 and 7, and FIGS. As shown in 3, one end of the push shaft portion 52 is exposed to the outside of the case 20 from the shaft insertion hole 29 formed in the center of the second case portion 26. The engagement protrusion 54 of the lock mechanism 50 is caught in the shaft insertion hole 29, so that the entire lock mechanism 50 is prevented from being exposed to the outside from the shaft insertion hole 29. The axial urging spring 70 shown in FIGS. 4 and 7 is a compression coil spring, but the axial urging spring 70 is not limited to the compression coil spring but is another spring such as a leaf spring. May be good.

The lock mechanism 50 shown in FIG. 4 is guided by the shaft insertion hole 29 and the rotation stop protrusion 28, and can move along the rotation axis direction D1. FIG. 8 is a conceptual diagram illustrating the movement of the locking mechanism 50 in the strap 10. In FIG. 8, the second case portion 26 in the case 20 is not shown in order to explain the positional relationship between the engaging protrusion 54 of the lock mechanism 50 and the engaging recess 36 of the winding core portion 30. ing.

The lock mechanism 50 is usually located at the first position P1 shown in FIG. 8A when the lock mechanism 50 is not operated by a user or the like. That is, the lock mechanism 50 receives the urging force in the rotation axis direction D1 in the upward direction on the paper surface in FIG. 8A by the axial urging spring 70. Therefore, the engaging protrusion 54 of the lock mechanism 50 is fitted into the engaging recess 36 of the winding core portion 30 by the urging force of the axial urging spring 70, and is located at the first position P1 shown in FIG. 8A. To position. At the first position P1, the engaging protrusion 54 of the lock mechanism 50 engages with the engaging recess 36 of the winding core portion 30, and the rotation of the winding core portion 30 is prevented. This is because the engaging protrusion 54 of the lock mechanism 50 can be engaged with the rotation stop protrusion 28 (see FIG. 4) of the second case portion 26, so that the rotation of the lock mechanism 50 itself is always caused by the case 20. This is because it is designed to be blocked.

On the other hand, the lock mechanism 50 is pushed by the user of the strap 10 or the like, and the lock mechanism 50 is pushed toward the inside of the case 20, so that the lock mechanism 50 moves to the second position P2 shown in FIG. 8 (b). do. As shown in FIG. 8, in the state where the lock mechanism 50 is located at the second position P2, the engaging protrusion 54 of the locking mechanism 50 disengages from the engaging recess 36 in the downward direction on the paper surface of FIG. 8 (b). , The lock mechanism 50 is disengaged from the winding core portion 30.

In the state where the lock mechanism 50 is located at the second position P2 shown in FIG. 8B, the winding core portion 30 can freely rotate relative to the case 20 and the spring receiving shaft 80. As described above, the locking mechanism 50 is movable between the first position P1 and the second position P2, so that the strap 10 locks and unlocks the winding core portion 30 that winds up the string portion 40. Can be switched.

When the strap 10 is not used as a shoulder strap for a bag, as shown in FIG. 1, most of the string portion 40 can be housed in the case 20 in a compact state. Further, when the user pulls out the string portion 40 of the strap 10, the user pushes the exposed portion of the lock mechanism 50 with a finger or the like, and pushes the lock mechanism 50 to the second position P2 (see FIG. 8B). , Pull the tip of the string portion 40 (one end 42, the second connector 45, etc.). As a result, the winding core portion 30 rotates, and the user of the strap 10 can pull out the string portion 40.

Further, the user of the strap 10 pulls out the string portion 40 to the desired length and then releases the finger from the lock mechanism 50. As described with reference to FIGS. 4, 6, 8 and the like, in the strap 10, the axial urging spring 70 urges the lock mechanism 50 to the first position P1, so that the user can use the lock mechanism 50. When the finger is released from the lock mechanism 50, the lock mechanism 50 moves to the first position P1, the rotation of the winding core portion 30 is locked, and the length of the string portion 40 is fixed (see FIG. 3).

Further, when the string portion 40 is stored in the case 20, the user of the strap 10 may simply push the exposed portion of the lock mechanism 50 with a finger or the like to push the lock mechanism 50 to the second position P2. .. When the winding core portion 30 was unlocked while the string portion 40 was not pulled, the winding core portion 30 was rotated by the force of the mainspring 60 (see FIG. 5) and was exposed from the case 20. The string portion 40 is wound around the winding core portion 30 and stored in the case 20. If it is desired to adjust the length of the string portion 40 to be short, the lock mechanism 50 may be pushed in while holding the exposed portion of the string portion 40, and the winding amount of the string portion 40 by the winding core portion 30 may be adjusted.

The strap 10 shown in FIGS. 1 to 8 can be easily replaced with various bag main bodies 90 by connecting the first connecting tool 22 and the second connecting tool 45 to both ends of the bag main body 90. Can be used. Further, since the string portion 40 is wound around the winding core portion 30 in the case 20, it can be quickly and compactly stored. Further, the length of the string portion 40 can be freely adjusted in a wide range by switching the lock / unlock of the take-up core portion 30 by the lock mechanism 50. The maximum tensile load that the strap 10 can support varies depending on the size and application of the bag body 90, but can be, for example, about 1 to 10 kg.

Further, in the strap 10, the locking mechanism 50 is arranged so as to overlap with the substantially center position of the winding core portion 30, so that the winding core portion 30 can be reliably locked. Further, since a plurality of engaging protrusions 54 and 36 are formed, the load applied to the engaging protrusions 54 and the like at the time of locking is reduced, and the strap 10 has good load capacity and durability. Have. Further, by arranging the lock mechanism 50 at a substantially center position of the winding core portion 30, the shoulder strap for the bag including the case can be further miniaturized.

Further, the spring receiving shaft 80 shown in FIG. 4 not only supports the axially urging spring 70 for urging the lock mechanism 50, but also serves as a rotating shaft for the take-up core portion 30, reducing the number of parts and durability. It is a shape that is effective for improving the properties and reducing the size.

As described above, the present invention has been described with reference to embodiments, but the present invention is not limited to the above-described embodiments, and other embodiments and modifications are within the technical scope of the present invention. Needless to say, it is included. For example, in the embodiment, the locking mechanism 50 has four engaging protrusions 54 that are evenly and radially arranged at a 90 degree pitch, whereas the locking mechanism has other angles such as 120 degrees, 60 degrees, 45 degrees, etc. It may have a plurality of engaging protrusions arranged evenly and radially in the above.

10 ... Strap (shoulder strap for bag)
20 ... Case 22 ... First connector 24 ... First case part 24a ... Opening 25 ... Recess 26 ... Second case part 28 ... Rotation stop protrusion 29 ... Shaft insertion hole 30 ... Winding core part D1 ... Rotation axis direction 40 ... String part 32 ... String part fixing part 33 ... Connecting groove 34 ... Power engaging part 35 ... Connecting protrusion 36 ... Engagement recess 37 ... Engagement receiving part 38 ... Partition plate 38a ... Central hole 42 ... One end part 44 ... The other end 45 ... Second connector 50 ... Lock mechanism P1 ... First position P2 ... Second position 52 ... Push shaft 54 ... Engagement protrusion 60 ... Zenmai spring 62 ... Outer peripheral end 64 ... Inner peripheral end 70 ... Axial urging spring 80 ... Spring receiving shaft 82 ... Tip 84 ... Base 86 ... Mounting surface 90 ... Bag body 92 ... Strap mounting

Claims (5)

A case with a first connector and
A winding core portion rotatably provided in the case and
A string portion that is provided with a second connecting tool at one end exposed from the case and the other end is fixed to the winding core portion.
It is movable between the first position where it engages with the take-up core and the second position where it is disengaged with the take-up core, and it can engage with the case. and a lock mechanism,
It has a spring that is housed in the case and urges the winding core portion in the rotational direction.
In a state where the locking mechanism is moved to the second position, the winding core portion is rotated by the urging force of the spring, and the string portion is wound around the winding core portion .
The winding core portion is detachable from the string portion fixing portion to which the other end portion of the string portion is fixed and the string portion fixing portion, and the outer peripheral side end portion of the mainspring engages with the string portion fixing portion. With a power engagement part, and a shoulder strap for the bag. The lock mechanism is arranged at a substantially center position of the winding core portion when viewed from the rotation axis direction of the winding core portion.
The locking mechanism includes a push shaft portion whose one end is exposed from the case, and at least two engaging protrusion portions housed in the case and projecting radially from the other end portion of the push shaft portion. And have
The locking mechanism is movable along the rotation axis direction and is movable.
Wherein the central portion of the winding up core portion, the first of the engaging protrusion engaging recesses engageable radially in position, the bag according to claim 1 that is at least two formed Shoulder strap for. The locking mechanism has an axially urging spring that urges the winding core portion in the rotation axis direction.
The locking mechanism is movable along the rotation axis direction and is movable.
The shoulder strap for a bag according to claim 1 or 2, wherein the axial urging spring urges the locking mechanism to the first position. The case has a first case portion and a second case portion that can be separated from each other in the rotation axis direction of the winding core portion.
The bag shoulder strap according to any one of claims 1 to 3, wherein the winding core portion is sandwiched between the first case portion and the second case portion and is housed in the case. .. The locking mechanism is provided with an axially urging spring that urges the winding core portion in the rotation axis direction.
Inside the case, it has a spring receiving shaft that protrudes from the first case portion in the direction of the rotation axis and supports the axial urging spring at the tip thereof.
The shoulder strap for a bag according to claim 4 , wherein the axial urging spring presses the locking mechanism against the second case portion to urge the first position.

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