Shoulder strap type adaptive handbag

Abstract

The utility model relates to the technical field of daily necessities, disclose a kind of shoulder strap type self-adapting handbag, including bag body, the inside of bag body is provided with winding piece, the winding piece includes two winding boxes of symmetrical distribution in the inside of bag body two sides, the inside rotationally connected of winding box has pivot one, the outside of pivot one is equipped with elastic band, and the end head position of elastic band is fixedly connected in the outside of pivot one, pivot one and winding box between are provided with torsion spring two, the outside of elastic band is provided with sponge shoulder strap. In the utility model, the self-adaptive adjustment of shoulder strap length is realized, and the frictional resistance is reduced, to ensure that winding process is smooth, the comfort of shoulder strap adjustment is improved, and the length of shoulder strap is stable when using, the convenience of adjustment and the reliability of use are improved.

Description

Technical Field

[0001] This utility model relates to the field of daily necessities technology, and in particular to a shoulder strap type self-adaptive tote bag. Background Technology

[0002] As a common tool for carrying items in daily life and shopping, the comfort and adjustability of the shoulder straps of tote bags directly affect the user experience. In actual use, differences in user height, body type, and the weight of the items carried all place dynamic demands on the shoulder strap length. For example, taller users or those carrying large items require longer shoulder straps for crossbody use, while shorter users or those carrying lighter items tend to prefer shorter shoulder straps for hand carrying. Therefore, the adaptive adjustment function of the shoulder strap becomes key to improving the product's practicality.

[0003] Currently, the main types of adjustable shoulder straps for tote bags on the market include fixed-length, snap-on, and Velcro types. Fixed-length shoulder straps cannot be adjusted according to user needs and are applicable to only a limited range of scenarios. While snap-on or Velcro straps can be manually adjusted, users need to repeatedly align the snaps or fasteners, making the operation cumbersome and lacking in precision. In particular, shoulder straps with a roll-up structure often lack efficient power drive components and low-friction guide structures, resulting in jamming and high resistance during the roll-up process, making it difficult to achieve smooth, adaptive length adjustment.

[0004] To address these issues, a shoulder strap-type adaptive tote bag is proposed. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a shoulder strap type self-adaptive tote bag, which aims to improve the problem that some tote bags in the prior art have difficulty in adaptively adjusting the length of the shoulder strap.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A shoulder strap type self-adaptive tote bag includes a bag body, and a winding component is provided inside the bag body. The winding component includes two winding boxes symmetrically distributed on both sides inside the bag body. A rotating shaft is rotatably connected inside the winding box. An elastic band is sleeved on the outside of the rotating shaft, and the end of the elastic band is fixedly connected to the outside of the rotating shaft. A torsion spring is provided between the rotating shaft and the winding box. A sponge shoulder strap is provided on the outside of the elastic band.

[0008] As a further description of the above technical solution:

[0009] The bag body is provided with a locking component for locking the shoulder strap. The locking component includes multiple fixing plates fixedly connected to the outside of the bag body, and two fixing plates are a group. A rotating shaft is fixedly connected inside each group of fixing plates. An opening and closing plate is rotatably connected to the outside of the rotating shaft. A torsion spring is sleeved on the outside of both ends of the rotating shaft. The two ends of the torsion spring are respectively connected to the opening and closing plate and the fixing plate. A serrated locking groove that meshes with each other is provided at the close end of the two opening and closing plates in the same group.

[0010] As a further description of the above technical solution:

[0011] A first limiting block is provided inside the bag body, and a second limiting block is provided inside the bag body near the outlet of the elastic band;

[0012] As a further description of the above technical solution:

[0013] The inner sides of both the first limiting block and the second limiting block are provided with smooth curved surfaces to reduce friction, and the outer side of the elastic band slides in cooperation with the smooth curved surfaces.

[0014] As a further description of the above technical solution:

[0015] The outer side of the opening and closing plate is provided with a protrusion for easy manual operation, and the surface of the protrusion is provided with an anti-slip texture.

[0016] As a further description of the above technical solution:

[0017] The surface of the sponge shoulder strap is provided with breathable mesh, and both ends of the sponge shoulder strap are connected to the elastic band through detachable connectors;

[0018] As a further description of the above technical solution:

[0019] The top of the bag is provided with a handle, and the handle is fixedly connected to the bag body by a reinforcing connector.

[0020] As a further description of the above technical solution:

[0021] The bag is made of environmentally friendly materials, namely recyclable non-woven fabric.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, through the cooperative structure of the rotating shaft 1, torsion spring 2 and elastic band in the winding box of the winding component, as well as the smooth curved surfaces on the inner sides of the limiting block 1 and the limiting block 2, when the sponge shoulder strap is pulled outward to pull out the elastic band, the rotating shaft 1 rotates to twist the torsion spring 2 to store potential energy. When the shoulder strap length needs to be reduced, the torsion spring 2 releases potential energy to drive the rotating shaft 1 to rotate in the opposite direction to retract the elastic band. During the process, the elastic band slides along the smooth curved surface of the limiting block, realizing the adaptive adjustment of the shoulder strap length, reducing frictional resistance, ensuring a smooth winding process, and improving the comfort of shoulder strap adjustment.

[0024] 2. In this utility model, the torsion spring 1 sleeved on the outer side of the locking component and the opening and closing plate cooperate to drive the sawtooth-shaped locking grooves at the near ends of the two opening and closing plates in the same group to engage and disengage. When the user applies external force to the anti-slip protrusion on the outer side of the opening and closing plate, the rebound force of the torsion spring 1 can be overcome to disengage the locking groove and release the elastic band. After being released, the torsion spring 1 resets and drives the locking groove to re-engage and clamp the elastic band, realizing convenient unlocking and locking operations during the shoulder strap length adjustment process, ensuring the shoulder strap length is stable during use, and improving the convenience of adjustment and the reliability of use. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of a shoulder strap type self-adaptive tote bag proposed in this utility model;

[0026] Figure 2 This is a schematic diagram of the structure of a shoulder strap type self-adaptive tote bag proposed in this utility model;

[0027] Figure 3 This is a structural schematic diagram of a retractor for a shoulder strap type self-adaptive tote bag proposed in this utility model;

[0028] Figure 4 This is a schematic diagram of the locking mechanism of a shoulder strap type self-adaptive tote bag proposed in this utility model;

[0029] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0030] Legend:

[0031] 1. Bag body; 2. Handle; 3. Rewinding component; 301. Rewinding box; 302. Spindle 1; 303. Elastic band; 304. Torsion spring 1; 305. Sponge shoulder strap; 4. Locking component; 401. Fixing plate; 402. Spindle 2; 403. Opening and closing plate; 404. Torsion spring 2; 405. Serrated locking groove; 5. Limiting block 1; 6. Limiting block 2. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figures 1 to 5 This utility model provides an embodiment of a shoulder strap type self-adaptive tote bag, including a bag body 1. The bag body 1 is made of environmentally friendly materials, specifically recyclable non-woven fabric, achieving environmental performance throughout the entire lifecycle of the tote bag's production, use, and recycling. This aligns with the concept of green consumption and reduces resource waste and environmental pollution. A handle 2 is provided at the top of the bag body 1, and the handle 2 is fixedly connected to the bag body 1 by a reinforcing connector. This ensures the stability of the tote bag's "hand-carrying" function. The reinforcing connector enhances the connection strength between the handle 2 and the bag body 1, preventing the handle 2 from detaching due to excessive weight and expanding its usage scenarios.

[0034] The bag body 1 is equipped with a winding component 3, which includes two winding boxes 301 symmetrically distributed on both sides of the bag body 1. This achieves a symmetrical layout of the shoulder strap winding structure, ensuring the balance and consistency of the shoulder strap adjustment on both sides and improving the overall structural stability. A rotating shaft 302 is rotatably connected inside the winding box 301. An elastic band 303 is sleeved on the outside of the rotating shaft 302, and the end of the elastic band 303 is fixedly connected to the outside of the rotating shaft 302. This enables the elastic band 303 and the rotating shaft 302 to rotate and unwind together. The rotation of the rotating shaft 302 drives the elastic band 303 to wind or unwind, providing a basic motion structure for adjusting the shoulder strap length. A torsion spring 404 is installed between the pivot 302 and the winding box 301, which stores and releases the power for the elastic band 303 to extend and retract. When the elastic band 303 is pulled out, the torsion spring 404 stores elastic potential energy. When the shoulder strap needs to be shortened, the potential energy is released to drive the pivot 302 to retract the elastic band 303, providing a power source for adaptive adjustment. A sponge shoulder strap 305 is installed on the outer side of the elastic band 303, ensuring wearing comfort. The sponge material relieves shoulder pressure and improves fit and softness during prolonged use. The surface of the sponge shoulder strap 305 has breathable mesh holes, enabling ventilation and heat dissipation, preventing stuffiness caused by sweat buildup, and further improving comfort. The two ends of the sponge shoulder strap 305 are connected to the elastic band 303 via detachable connectors, allowing for convenient maintenance and replacement. The detachable structure allows for individual removal of the sponge shoulder strap 305 for cleaning or replacement, extending the product's lifespan.

[0035] The exterior of the bag body 1 is equipped with a locking element 4 for locking the shoulder strap. The locking element 4 includes multiple fixing plates 401 fixedly connected to the outside of the bag body 1, with two fixing plates 401 forming a group, achieving stable installation of the locking structure. The fixing plates 401 provide a rotational support base for the opening and closing plate 403, ensuring a reliable connection between the locking element 4 and the bag body 1. A second rotating shaft 402 is fixedly connected internally to each group of fixing plates 401. The opening and closing plate 403 is rotatably connected to the outside of the second rotating shaft 402, providing rotational guidance for the opening and closing plate 403. The second rotating shaft 402 provides a rotation axis for the opening and closing plate 403, allowing the opening and closing plate 403 to rotate around it to achieve engagement and disengagement of the locking groove. The outer side of the opening and closing plate 403 is provided with a protrusion for easy manual operation. The surface of the protrusion is provided with an anti-slip texture, enabling convenient operation of the opening and closing plate 403. The protrusion facilitates the user's application of force, and the anti-slip texture increases friction, preventing slippage during operation and improving the convenience of unlocking and locking. Both ends of the rotating shaft 402 are fitted with torsion springs 304, and the two ends of the torsion springs 304 are connected to the opening plate 403 and the fixing plate 401 respectively, realizing the automatic reset function of the opening plate 403. The torsion springs 304 provide rebound force, so that the opening plate 403 remains in the engaging state of the locking groove when no external force is applied, ensuring the stability of the shoulder strap length locking. The two opening plates 403 in the same group are provided with interlocking serrated locking grooves 405 at their adjacent ends, realizing the clamping and releasing of the elastic band 303. When engaged, the elastic band 303 is clamped to a fixed length, and when separated, the elastic band 303 is released to allow sliding. This is the core locking structure for shoulder strap length adjustment.

[0036] The bag body 1 has a limiting block 5 inside, and a limiting block 6 is located inside the bag body 1 near the outlet of the elastic band 303. This restricts the movement trajectory of the elastic band 303, ensuring that the elastic band 303 enters and exits the winding box 301 along a preset path, preventing deviation or tangling during winding and unwinding. The inner sides of both limiting blocks 5 and 6 are provided with smooth curved surfaces to reduce friction. The outer side of the elastic band 303 slides against the smooth curved surfaces, achieving low resistance characteristics for the sliding of the elastic band 303. The smooth curved surfaces reduce frictional loss during winding and unwinding of the elastic band 303, ensuring smooth adjustment without jamming and improving operational fluency.

[0037] Working principle: When the device is not in use, all core components are in an initial constrained state.

[0038] In the pre-tensioned state of the take-up component 3: the rotating shaft 302 inside the take-up box 301 is connected to the box body via a torsion spring 404. One end of the elastic band 303 is fixed to the outside of the rotating shaft 302, and part of the elastic band 303 is led out of the take-up box 301 through the smooth curved surfaces of the limiting block 5 and the limiting block 6, with the end connected to the sponge shoulder strap 305. At this time, the torsion spring 404 stores elastic potential energy due to the pre-stretched state of the elastic band 303, providing a power basis for subsequent length adjustment.

[0039] The locking state of the locking member 4: Under the action of the torsion spring 304, the opening and closing plate 403 of the locking member 4 rotates around the rotating shaft 402, so that the serrated locking grooves 405 of the two opening and closing plates 403 in the same group mesh with each other, clamping the outgoing elastic band 303, limiting its length change, and ensuring the stability of the initial length of the shoulder strap.

[0040] When a user needs to adjust the shoulder strap length according to body shape and item weight, pulling the sponge shoulder strap 305 outwards pulls the elastic band 303 outwards. The external friction of the elastic band 303 overcomes the rebound force of the torsion spring 304, causing the two opening plates 403 to rotate in opposite directions around the pivot 402, opening the outlet. At this time, the serrated locking groove 405 disengages, and the elastic band 303 is released from its locking constraint, entering a free-sliding state, thus creating conditions for length adjustment.

[0041] If the shoulder strap length needs to be reduced, the user can apply external force through the anti-slip protrusions on the outside of the opening and closing plates 403 to open the two opening and closing plates 403 again. At this time, the second torsion spring 404 in the winding box 301 releases its elastic potential energy, causing the first rotating shaft 302 to rotate in the opposite direction, winding the excess elastic band 303 back into the winding box 301. During the process, the elastic band 303 slides along the smooth curved surfaces of the first limiting block 5 and the second limiting block 6. The curved surface design reduces frictional resistance, ensuring a smooth and jam-free winding process.

[0042] After the shoulder strap length is adjusted to the appropriate size, the user releases the protrusion of the opening and closing plate 403. At this time, the torsion spring 304 immediately returns to its original shape, causing the opening and closing plate 403 to return to its original position around the pivot 402, so that the serrated locking groove 405 re-engages, clamps the elastic band 303, fixes its position, and completes the locking of the shoulder strap length.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A shoulder strap type self-adaptive tote bag, comprising a bag body (1), characterized in that: The bag body (1) is provided with a winding component (3) inside. The winding component (3) includes two winding boxes (301) symmetrically distributed on both sides of the inside of the bag body (1). The winding box (301) is rotatably connected to a rotating shaft (302). An elastic band (303) is sleeved on the outside of the rotating shaft (302), and the end of the elastic band (303) is fixedly connected to the outside of the rotating shaft (302). A torsion spring (404) is provided between the rotating shaft (302) and the winding box (301). A sponge shoulder strap (305) is provided on the outside of the elastic band (303).

2. The self-adaptive shoulder strap tote bag according to claim 1, characterized in that: The bag body (1) is provided with a locking member (4) for locking the shoulder strap. The locking member (4) includes a plurality of fixing plates (401) fixedly connected to the outside of the bag body (1), and two fixing plates (401) are a group. A rotating shaft (402) is fixedly connected inside each group of fixing plates (401). An opening and closing plate (403) is rotatably connected to the outside of the rotating shaft (402). A torsion spring (304) is sleeved on the outside of both ends of the rotating shaft (402), and the two ends of the torsion spring (304) are respectively connected to the opening and closing plate (403) and the fixing plate (401). A sawtooth-shaped snap-fit ​​groove (405) is provided at the close end of the two opening and closing plates (403) in the same group.

3. The self-adaptive shoulder strap tote bag according to claim 1, characterized in that: The bag body (1) is provided with a limiting block one (5) inside, and a limiting block two (6) is provided inside the bag body (1) near the outlet of the elastic band (303).

4. A shoulder strap type self-adaptive tote bag according to claim 3, characterized in that: The inner sides of both the first limiting block (5) and the second limiting block (6) are provided with smooth curved surfaces to reduce friction, and the outer side of the elastic band (303) slides in cooperation with the smooth curved surfaces.

5. A shoulder strap type self-adaptive tote bag according to claim 2, characterized in that: The outer side of the opening and closing plate (403) is provided with a protrusion for easy manual operation, and the surface of the protrusion is provided with an anti-slip texture.

6. A shoulder strap type self-adaptive tote bag according to claim 1, characterized in that: The surface of the sponge shoulder strap (305) is provided with breathable mesh holes, and the two ends of the sponge shoulder strap (305) are connected to the elastic band (303) through detachable connectors.

7. A shoulder strap type self-adaptive tote bag according to claim 1, characterized in that: The top of the bag body (1) is provided with a handle (2), and the handle (2) is fixedly connected to the bag body (1) by a reinforcing connector.

8. A shoulder strap type self-adaptive tote bag according to claim 1, characterized in that: The bag body (1) is made of environmentally friendly materials, namely recyclable non-woven fabric.

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