Luggage with detachable luggage wheels

Abstract

The luggage comprises a luggage body, wheel bodies are arranged at the bottom end of the luggage body, a plurality of groups of wheel bodies are arranged, mounting mechanisms are arranged between the wheel bodies and the luggage body, and each mounting mechanism comprises a connecting block, an inserting rod, a fixing sleeve, a sliding rod, a sliding block, a connecting plate, a contraction spring, a clamping block and a clamping groove. A dismounting mechanism is arranged on the outer wall of the fixing sleeve, the dismounting mechanism comprises a sliding sleeve, multiple sets of inclined grooves, a receding groove, a connecting sleeve, a positioning block, a limiting groove and a locking mechanism, the sliding sleeve slides on the outer wall of the fixing sleeve, and the multiple sets of inclined grooves are distributed in the outer wall of the sliding sleeve; the mounting mechanism realizes rapid and stable connection between the luggage wheel and the luggage body through the synergistic effect of a connecting block, an inserting rod, a fixing sleeve, a sliding rod, a sliding block, a connecting plate, a contraction spring, a clamping block and a clamping groove, and the dismounting mechanism realizes convenient dismounting of the luggage wheel through the ingenious design of a sliding sleeve, an inclined groove, a receding groove, a connecting sleeve, a positioning block, a limiting groove and a locking mechanism.

Description

Technical Field

[0001] This utility model relates to the field of luggage technology, and more specifically, to a luggage with detachable wheels. Background Technology

[0002] In travel and business trip scenarios, the integrity and usability of luggage wheels directly affect the user's travel experience and luggage handling efficiency. Currently, most luggage uses a fixed wheel structure, which makes it difficult for users to replace or temporarily remove the wheels when they are damaged or unsuitable in certain environments.

[0003] Traditional methods of installing luggage wheels typically require specialized tools and techniques, and the disassembly process is complex and time-consuming. This not only increases maintenance costs but also causes numerous inconveniences for users when wheel problems occur, making it difficult to meet the needs of modern travelers for convenient maintenance and quick adaptation to different environments. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the problems existing in the prior art, this utility model provides a bag with detachable wheels to solve the technical problems mentioned in the background art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a bag with detachable wheels, comprising a bag body, a wheel body at the bottom of the bag body, multiple sets of wheels, each with an installation mechanism between it and the bag body, the installation mechanism comprising a connecting block, a plug rod, a fixing sleeve, a sliding rod, a slider, a connecting plate, a contraction spring, a locking block, and a locking groove, the connecting block rotating on the top of the wheel body, the plug rod fixed to the top of the connecting block, the fixing sleeve fixed to the bottom surface of the bag body, multiple sets of sliding rods sliding on the outer wall of the fixing sleeve, sliders mounted on the top of the multiple sets of sliding rods, and a connecting plate mounted on the outside of the multiple sets of sliders. The contraction spring is installed inside multiple sets of connecting plates and is connected to the outer wall of the fixed sleeve. The locking block is installed at the bottom of multiple sets of sliding rods. Multiple sets of locking grooves are distributed on the outer wall of the insertion rod. The outer wall of the fixed sleeve is provided with a disassembly mechanism. The disassembly mechanism includes a sliding sleeve, an inclined groove, a clearance groove, a connecting sleeve, a positioning block, a limiting groove, and a locking mechanism. The sliding sleeve slides on the outer wall of the fixed sleeve. Multiple sets of inclined grooves are distributed on the outer wall of the sliding sleeve. The clearance groove is located inside the multiple sets of inclined grooves. The connecting sleeve is fixed to the bottom surface of the sliding sleeve. Multiple sets of positioning blocks are provided and slide on the outer wall of the connecting sleeve. Multiple sets of limiting grooves are provided on the outer wall of the fixed sleeve.

[0008] The present invention is further configured such that the locking mechanism includes a limiting sleeve, a support rod, a limiting block, a rotating sleeve, a limiting groove, and an unlocking groove. The limiting sleeve slides on the outer wall of the fixed sleeve. Multiple sets of support rods are distributed on the bottom surface of the limiting sleeve. The limiting block is installed at the bottom end of the multiple sets of support rods. The rotating sleeve rotates on the outer wall of the fixed sleeve. Multiple sets of limiting grooves are distributed on the rotating sleeve and are slidably connected to the multiple sets of support rods respectively. The unlocking groove is located at one end of the multiple sets of limiting grooves.

[0009] The present invention is further configured such that limiting blocks are installed on the outer walls of multiple sets of support rods. The setting of the limiting blocks enhances the structural strength of the support rods and provides a contact point with the bottom surface of the rotating sleeve, ensuring the stability and limiting function of the support rods during rotation and preventing the mechanism from loosening unexpectedly.

[0010] The present invention is further configured such that a force-applying spring is connected to the top surface of the rotating sleeve, and a thrust bearing is connected between the top end of the force-applying spring and the limiting sleeve. The combination design of the force-applying spring and the thrust bearing realizes the automatic return function of the limiting sleeve and the buffering of rotational resistance, reduces the operating force and improves the stability of the rotation of the rotating sleeve, while extending the service life of the mechanism.

[0011] The present invention is further configured such that the diameter of the multiple sets of unlocking slots is greater than that of the limiting block and the restricting block. The reasonable design of the unlocking slot diameter ensures that the limiting block and the restricting block can pass smoothly, avoid jamming, improve the smoothness and reliability of the unlocking operation, and reduce wear between components.

[0012] The present invention is further configured such that a reset spring is connected to the top of each of the multiple sets of positioning blocks, and the bottom of each of the multiple sets of reset springs is fixed to the outer wall of the connecting sleeve. The reset spring enables the positioning block to automatically return to its original position after being subjected to force, thereby improving the flexibility and reusability of the positioning mechanism and ensuring the precise fit between the positioning block and the limiting groove during assembly and disassembly.

[0013] The present invention is further provided with a tension spring connecting the top end of the sliding sleeve and the fixed sleeve. The tension spring provides the elastic tension required for the movement of the sliding sleeve, ensuring that the sliding sleeve can automatically reset after operation, simplifying the operation steps, improving the disassembly and assembly efficiency, and enhancing the stability and reliability of the mechanism.

[0014] The present invention is further configured such that a positioning strip is provided on the inner side of the fixing sleeve, and multiple sets of positioning strips are provided; a positioning groove is provided on the outer wall of the insertion rod; multiple sets of positioning strips and positioning grooves are provided and slidably connected; the sliding connection design of positioning strips and positioning grooves realizes the precise alignment and anti-rotation function of insertion rod and fixing sleeve, ensuring the accuracy and stability during installation, while improving the load-bearing capacity and service life of the overall structure.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a bag with detachable wheels, which has the following advantages:

[0017] 1. The installation mechanism, through the coordinated action of connecting blocks, insert rods, fixing sleeves, sliding rods, sliders, connecting plates, contraction springs, locking blocks, and locking slots, achieves a quick and stable connection between the luggage wheels and the luggage body. The design of the connecting blocks and insert rods allows the wheels to be easily positioned, the combination of the fixing sleeves and sliding rods provides stable support, the cooperation between the sliders and connecting plates ensures a smooth installation process, the elasticity of the contraction springs ensures a tight connection, and the engaging design of the locking blocks and locking slots further enhances the reliability of the connection, making the wheels firmly installed on the luggage body and not easy to fall off, while also allowing users to quickly replace the wheels as needed.

[0018] 2. The disassembly mechanism, through the ingenious design of a sliding sleeve, inclined groove, clearance groove, connecting sleeve, positioning block, limiting groove, and locking mechanism, enables convenient disassembly of the luggage wheels. The cooperation between the sliding sleeve and the inclined groove allows the slider to slide smoothly under external force, the clearance groove provides sufficient space for the sliding rod to move, the combination of the connecting sleeve and the positioning block ensures precise control of the disassembly process, and the design of the limiting groove and locking mechanism ensures stability and safety during the disassembly process. This allows users to easily and quickly disassemble the luggage wheels without using professional tools, improving the maintenance efficiency of luggage and the user experience.

[0019] 3. The locking mechanism, through the precise cooperation of the limiting sleeve, support rod, limiting block, rotating sleeve, limiting groove, and unlocking groove, ensures stable locking of the wheel body during installation and disassembly. The design of the limiting sleeve and support rod provides reliable limiting function, the cooperation of the limiting block and rotating sleeve realizes effective force transmission, and the setting of the limiting groove and unlocking groove provides fine adjustment capability, making the locking process more flexible and reliable. The application of force spring and thrust bearing further optimizes the operating feel of the locking mechanism, reduces operating force, improves the durability and operation convenience of the locking mechanism, and ensures the stability and safety of the wheel body on the housing. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a bag with detachable wheels according to the present invention;

[0021] Figure 2 This is a schematic diagram of the disassembled structure of the wheel body in this utility model;

[0022] Figure 3 This is a cross-sectional view of the locking mechanism in this utility model.

[0023] Figure 4 This is a cross-sectional view of the fixing sleeve in this utility model;

[0024] Figure 5 This is a cross-sectional view of the sliding sleeve in this utility model.

[0025] In the diagram: 1. Housing; 2. Wheel; 3. Connecting block; 4. Insert rod; 5. Fixing sleeve; 6. Sliding rod; 7. Sliding block; 8. Connecting plate; 9. Contraction spring; 10. Locking block; 11. Locking groove; 12. Sliding sleeve; 13. Inclined groove; 14. Clearance groove; 15. Connecting sleeve; 16. Positioning block; 17. Limiting groove; 18. Limiting sleeve; 19. Support rod; 20. Limiting block; 21. Rotating sleeve; 22. Restriction groove; 23. Unlocking groove; 24. Restriction block; 25. Force spring; 26. Thrust bearing; 27. Return spring; 28. Tension spring; 29. ​​Positioning strip; 30. Positioning groove. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0028] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0029] Please see Figures 1-5A bag with detachable wheels includes a bag body 1, with wheels 2 at the bottom of the bag body 1. Multiple sets of wheels 2 are provided, each with an installation mechanism between itself and the bag body 1. Each installation mechanism includes a connecting block 3, a rod 4, a fixing sleeve 5, a sliding rod 6, a slider 7, a connecting plate 8, a contraction spring 9, a locking block 10, and a locking groove 11. The connecting block 3 rotates on the top of the wheel 2, the rod 4 is fixed to the top of the connecting block 3, the fixing sleeve 5 is fixed to the bottom surface of the bag body 1, multiple sets of sliding rods 6 slide on the outer wall of the fixing sleeve 5, sliders 7 are installed on the top of the multiple sets of sliding rods 6, the connecting plate 8 is installed on the outer side of the multiple sets of sliders 7, and the contraction spring 9 is installed on the inner side of the multiple sets of connecting plates 8 and is connected to the fixing sleeve 11. The outer wall of the fixed sleeve 5 is connected, the locking block 10 is installed at the bottom of multiple sets of sliding rods 6, the locking groove 11 is provided in multiple sets distributed on the outer wall of the insertion rod 4, the outer wall of the fixed sleeve 5 is provided with a disassembly mechanism, the disassembly mechanism includes a sliding sleeve 12, an inclined groove 13, a clearance groove 14, a connecting sleeve 15, a positioning block 16, a limiting groove 17 and a locking mechanism. The sliding sleeve 12 slides on the outer wall of the fixed sleeve 5, the inclined groove 13 is provided in multiple sets distributed on the outer wall of the sliding sleeve 12, the clearance groove 14 is provided on the inner side of the multiple sets of inclined grooves 13, the connecting sleeve 15 is fixed on the bottom surface of the sliding sleeve 12, the positioning block 16 is provided in multiple sets and slides on the outer wall of the connecting sleeve 15, and the limiting groove 17 is provided in multiple sets distributed on the outer wall of the fixed sleeve 5.

[0030] The locking mechanism includes a limiting sleeve 18, a support rod 19, a limiting block 20, a rotating sleeve 21, a limiting groove 22, and an unlocking groove 23. The limiting sleeve 18 slides on the outer wall of the fixed sleeve 5. Multiple sets of support rods 19 are distributed on the bottom surface of the limiting sleeve 18. The limiting block 20 is installed at the bottom end of the multiple sets of support rods 19. The rotating sleeve 21 rotates on the outer wall of the fixed sleeve 5. Multiple sets of limiting grooves 22 are distributed on the rotating sleeve 21 and are slidably connected to the multiple sets of support rods 19 respectively. The unlocking groove 23 is located at one end of the multiple sets of limiting grooves 22.

[0031] Each of the multiple support rods 19 has a limiting block 24 installed on its outer wall. The limiting block 24 enhances the structural strength of the support rod 19 and forms a contact point with the bottom surface of the rotating sleeve 21 during rotation, ensuring the stability and reliability of the mechanism in the locked state.

[0032] A force-applying spring 25 is connected to the top surface of the rotating sleeve 21. A thrust bearing 26 is connected between the top of the force-applying spring 25 and the limiting sleeve 18. The force-applying spring 25 provides continuous elastic pressure, while the thrust bearing 26 allows the limiting sleeve 18 to rotate freely under pressure, reducing operating resistance and improving the sensitivity of the mechanism.

[0033] The diameter of the multiple unlocking slots 23 is greater than that of the limit block 20 and the restriction block 24. The larger unlocking slots 23 design ensures that the limit block 20 and the restriction block 24 can pass through smoothly, avoiding jamming during the unlocking process and improving the smoothness of the disassembly operation.

[0034] Each of the multiple positioning blocks 16 has a reset spring 27 connected to its top end, and the bottom of each of the multiple reset springs 27 is fixed to the outer wall of the connecting sleeve 15. The reset spring 27 enables the positioning block 16 to automatically return to its original position after the limit is released, ensuring that it can be accurately embedded in the limit groove 17 again during the next installation.

[0035] A tension spring 28 is provided between the top of the sliding sleeve 12 and the fixed sleeve 5. The tension spring 28 maintains the position of the sliding sleeve 12 in a static state and provides the necessary tension during operation so that the sliding sleeve 12 can drive the internal mechanism to complete the disassembly action and then automatically reset.

[0036] The inner side of the fixed sleeve 5 is provided with positioning strips 29, and multiple sets of positioning strips 29 are provided. The outer wall of the insertion rod 4 is provided with positioning grooves 30. Multiple sets of positioning strips 29 and positioning grooves 30 are provided and are slidably connected. The cooperative design of positioning strips 29 and positioning grooves 30 ensures that the insertion rod 4 can be accurately positioned when inserted into the fixed sleeve 5 and prevents rotation, thereby improving the stability and load-bearing capacity of the connection.

[0037] In this embodiment, when the wheel 2 needs to be disassembled, rotating the rotating sleeve 21 clockwise causes multiple sets of support rods 19 to slide along the limiting groove 22 into the unlocking groove 23. At this time, multiple sets of stops disengage from the bottom surface of the rotating sleeve 21. Then, the limiting sleeve 18 is pushed to release the contact with multiple sets of positioning blocks 16 and to compress the force spring 25, allowing multiple sets of limiting grooves 22 to pass through the unlocking groove 23. Then, rotating the rotating sleeve 21 counterclockwise causes multiple sets of support rods 19 to slide into the limiting groove 22. At this time, multiple sets of limiting blocks 24 abut against the rotating sleeve. On the bottom surface 21, multiple sets of reset springs 27 pull the positioning block 16 away from the limiting groove 17, releasing the limiting of the sliding sleeve 12. The tension spring 28 pulls the sliding sleeve 12, causing multiple sets of sliders 7 to slide along the inclined groove 13. The force of the tension spring 28 is greater than the force of multiple sets of contraction springs 9, causing multiple sets of sliders 7 to slide along the inclined groove 13 and pull the slide rod 6 and the locking block 10 away from the locking groove 11. At the same time, multiple sets of connecting plates 8 stretch the contraction spring 9, releasing the locking block 10 from the locking groove 11. Then, the insert rod 4 is pulled out of the fixing sleeve 5, completing the disassembly of the wheel body 2.

[0038] More specifically, when the wheel body 2 needs to be installed, the insert rod 4 is inserted into the fixing sleeve 5, and the multiple sets of positioning strips 29 are positioned and inserted into the positioning groove 30. Then, the sliding sleeve 12 is pushed so that the multiple sets of sliders 7 slide inward along the inclined groove 13. The multiple sets of contraction springs 9 pull the connecting plate 8 and the sliders 7, and at the same time drive the multiple sets of sliding rods 6 to push the locking block 10 to engage in the locking groove 11. When the multiple sets of positioning blocks 16 move to the outside of the limiting groove 17, the rotating sleeve 21 is rotated clockwise so that the multiple sets of support rods 19 move into the unlocking groove 23, so that the multiple sets of limiting blocks 24 release from contact with the rotating sleeve 21. The force spring 25 pushes the limiting sleeve 18 to slide and abut against the top of the multiple sets of positioning blocks 16 and pushes the positioning blocks 16 to engage in the limiting groove 17. Then, the rotating sleeve 21 is rotated counterclockwise so that the multiple sets of support rods 19 slide into the limiting groove 22, so that the multiple sets of stops abut against the bottom surface of the rotating sleeve 21, thus completing the installation of the wheel body 2.

[0039] In summary, during the use or operation of the overall equipment: when it is necessary to disassemble wheel 2, rotating the rotating sleeve 21 clockwise causes multiple sets of support rods 19 to slide along the limiting groove 22 into the unlocking groove 23. At this time, multiple sets of stops disengage from the bottom surface of the rotating sleeve 21. Then, the limiting sleeve 18 is pushed to release the contact with multiple sets of positioning blocks 16 and compress the force spring 25, allowing multiple sets of limiting grooves 22 to pass through the unlocking groove 23. Then, rotating the rotating sleeve 21 counterclockwise causes multiple sets of support rods 19 to slide into the limiting groove 22. At this time, multiple sets of limiting blocks 24 abut against the ground. Connected to the bottom surface of the rotating sleeve 21, multiple sets of reset springs 27 pull the positioning block 16 away from the limiting groove 17, releasing the limiting of the sliding sleeve 12. The tension spring 28 pulls the sliding sleeve 12, causing multiple sets of sliders 7 to slide along the inclined groove 13. The force of the tension spring 28 is greater than the force of multiple sets of contraction springs 9, causing multiple sets of sliders 7 to slide along the inclined groove 13 and pull the slide rod 6 and the locking block 10 away from the locking groove 11. At the same time, multiple sets of connecting plates 8 stretch the contraction spring 9, releasing the locking block 10 from the locking groove 11. Then, the insert rod 4 is pulled out of the fixing sleeve 5, completing the disassembly of the wheel body 2.

[0040] When the wheel body 2 needs to be installed, insert the rod 4 into the fixed sleeve 5, and position and insert it into the positioning groove 30 through multiple sets of positioning strips 29. Then push the sliding sleeve 12 to make multiple sets of sliders 7 slide inward along the inclined groove 13. Multiple sets of contraction springs 9 pull the connecting plate 8 and sliders 7, and at the same time drive multiple sets of sliding rods 6 to push the locking block 10 to engage in the locking groove 11. When multiple sets of positioning blocks 16 move to the outside of the limiting groove 17, rotate the rotating sleeve 21 clockwise to make multiple sets of support rods 19 move into the unlocking groove 23, so that multiple sets of limiting blocks 24 release from contact with the rotating sleeve 21. Through the force spring 25, push the limiting sleeve 18 to slide and abut against the top of multiple sets of positioning blocks 16 and push the positioning blocks 16 to engage in the limiting groove 17. Then rotate the rotating sleeve 21 counterclockwise to make multiple sets of support rods 19 slide into the limiting groove 22, so that multiple sets of stops abut against the bottom surface of the rotating sleeve 21, thus completing the installation of the wheel body 2.

[0041] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A detachable suitcase wheel suitcase comprising a case (1), characterized in that: The bottom end of the box (1) is provided with a wheel body (2), which is provided with a plurality of groups and is provided with a mounting mechanism between the box (1), the mounting mechanism comprises a connecting block (3), a plug rod (4), a fixed sleeve (5), a sliding rod (6), a sliding block (7), a connecting plate (8), a contraction spring (9), a clamping block (10) and a clamping groove (11), the connecting block (3) is rotatably arranged at the top end of the wheel body (2), the plug rod (4) is fixedly arranged at the top end of the connecting block (3), the fixed sleeve (5) is fixedly arranged at the bottom surface of the box (1), the sliding rod (6) is provided with a plurality of groups and is slidably arranged at the outer wall of the fixed sleeve (5), the sliding block (7) is mounted at the top end of the plurality of sliding rods (6), the connecting plate (8) is mounted at the outer side of the plurality of sliding blocks (7), the contraction spring (9) is mounted at the inner side of the plurality of connecting plates (8) and is connected with the outer wall of the fixed sleeve (5), the clamping block (10) is mounted at the bottom end of the plurality of sliding rods (6), and the clamping groove (11) is provided with a plurality of groups and is distributed on the outer wall of the plug rod (4). The outer wall of the fixed sleeve (5) is provided with a dismounting mechanism, and the dismounting mechanism comprises a sliding sleeve (12), an inclined groove (13), a let-in groove (14), a connecting sleeve (15), a positioning block (16), a limiting groove (17) and a locking mechanism. The sliding sleeve (12) is slidably arranged on the outer wall of the fixed sleeve (5), the inclined groove (13) is provided with a plurality of groups and is distributed on the outer wall of the sliding sleeve (12), the let-in groove (14) is arranged at the inner side of the plurality of inclined grooves (13), the connecting sleeve (15) is fixedly arranged at the bottom surface of the sliding sleeve (12), the positioning block (16) is provided with a plurality of groups and is slidably arranged on the outer wall of the connecting sleeve (15), and the limiting groove (17) is provided with a plurality of groups and is distributed on the outer wall of the fixed sleeve (5).

2. The luggage of claim 1, wherein: The locking mechanism comprises a limiting sleeve (18), a supporting rod (19), a limiting block (20), a rotating sleeve (21), a limiting groove (22) and an unlocking groove (23), the limiting sleeve (18) is slidably arranged on the outer wall of the fixed sleeve (5), the supporting rod (19) is provided with a plurality of groups and is distributed on the bottom surface of the limiting sleeve (18), the limiting block (20) is mounted at the bottom end of the plurality of supporting rods (19), the rotating sleeve (21) is rotatably arranged on the outer wall of the fixed sleeve (5), the limiting groove (22) is provided with a plurality of groups and is distributed on the rotating sleeve (21) and is slidably connected with the plurality of supporting rods (19) respectively, and the unlocking groove (23) is arranged at one end of the plurality of limiting grooves (22).

3. A luggage case according to claim 2 wherein: The outer wall of the plurality of supporting rods (19) is provided with a limiting block (24).

4. A luggage case according to claim 3 wherein: The top surface of the rotating sleeve (21) is connected with a force spring (25), and the top end of the force spring (25) is connected with the limiting sleeve (18) through a thrust bearing (26).

5. A bag with detachable wheels according to claim 4, characterized in that: multiple sets of wheels are used. The diameter of the unlocking groove (23) is greater than that of the limiting block (20) and the limiting block (24).

6. The luggage of claim 5, wherein the plurality of sets of wheels are arranged in a plurality of groups. The top end of the positioning block (16) is connected with a reset spring (27), and the bottom end of the plurality of reset springs (27) is fixedly arranged on the outer wall of the connecting sleeve (15).

7. A luggage case according to claim 6 wherein: The top end of the sliding sleeve (12) is connected with the fixed sleeve (5) through a tension spring (28).

8. A luggage case according to claim 7, wherein: The inner side of the fixed sleeve (5) is provided with a positioning strip (29), the positioning strip (29) is provided with a plurality of groups, the outer wall of the plug rod (4) is provided with a positioning groove (30), and the positioning strip (29) and the positioning groove (30) are provided with a plurality of groups and are slidably connected.

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