A caster detachable connected luggage
By designing a detachable caster structure and utilizing the snap-fit mechanism of support blocks and mounting blocks, the problem of inconvenient removal of existing one-piece luggage casters is solved, achieving convenient assembly and disassembly as well as lightweight portability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIAXING ZIYOUXING LUGGAGE BAGS CO LTD
- Filing Date
- 2025-06-13
- Publication Date
- 2026-06-23
AI Technical Summary
The casters on existing one-piece bags are fixed in place, making them inconvenient to remove when not in use, affecting portability and increasing weight.
Design a one-piece bag with detachable casters. The detachable installation and removal of the casters are achieved by the cooperation of the guide groove on the support block and the mounting block, and by the use of the snap-fit block and spring mechanism. The design includes the structural design of the guide groove, the snap-fit groove, the snap-fit block, the top rod and the return spring.
It enables easy assembly and disassembly of casters, improving portability, reducing the weight of bags, and meeting the needs of different usage scenarios.
Smart Images

Figure CN224386931U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of integrated bag technology, specifically relating to an integrated bag with detachable casters. Background Technology
[0002] One-piece luggage refers to luggage with a one-piece structure, which usually includes components such as the body, pull rod, casters, front cover and front pocket.
[0003] Currently, most existing one-piece luggage has casters fixed to the bottom of the luggage with screws. This makes it inconvenient to remove the casters when they are not needed, thus affecting portability and increasing the weight of the luggage. Therefore, we propose a one-piece luggage with detachable casters. Utility Model Content
[0004] The purpose of this utility model is to provide a bag with detachable casters that can solve the existing problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a detachable, one-piece suitcase, comprising a one-piece suitcase body, support blocks, casters, and mounting blocks. A tray is fixedly installed at the bottom of the one-piece suitcase body, and the tray is fixedly connected to the bottom of the one-piece suitcase body. Support blocks are fixedly installed around the bottom of the tray. Guide grooves are provided on both sides of the bottom end of the support blocks. A retractable snap-fit block is provided in the middle of the guide groove. Mounting blocks are provided on the outer periphery of the support blocks. Casters are movably connected to the bottom of the mounting blocks via bearings. A mounting groove is provided on one side of the top of the mounting blocks. Guide blocks are fixedly installed on both sides of the mounting groove. A snap-fit groove is provided in the middle of the guide blocks. The snap-fit block extends into the groove and engages with it.
[0006] Preferably, a push rod is slidably disposed inside the inner wall of the slot, one end of the push rod is compressed into the inside of the slot, and the other end of the push rod passes through the housing of the mounting block and extends to its outside.
[0007] Preferably, a shrinkage groove is provided in the middle of the guide groove, a snap-fit spring is provided inside the shrinkage groove, one end of the snap-fit block extends into the inside of the shrinkage groove and is slidably connected to its inner wall, one end of the snap-fit block extending into the shrinkage groove is fixedly connected to one end of the snap-fit spring, and an arc-shaped inclined surface is provided on one side of the end of the snap-fit block extending into the guide groove.
[0008] Preferably, the inner walls on both sides of the shrink groove are provided with limiting grooves, and the end of the snap-fit block extending into the shrink groove is provided with limiting blocks on both sides. The limiting blocks extend into the limiting groove and are slidably connected to its inner wall.
[0009] Preferably, the inner sides of the housing of the mounting block and the middle end of the top rod are respectively provided with limiting grooves and limiting blocks. The limiting grooves opened inside the inner walls of the two sides of the mounting block are provided with reset springs, and one end of the reset springs is fixedly connected to the limiting block on the top rod.
[0010] Preferably, a pull rod is provided on the outer side of the one-piece bag body, and the pull rod is fixedly installed on the outer side of the one-piece bag body.
[0011] Compared with the prior art, the beneficial effects of this utility model are:
[0012] 1. By utilizing the guide groove on the support block and the guide blocks on both sides of the mounting groove inside the mounting block, the support block and the mounting block can be slidably spliced. Under the action of the snap-fit spring, the snap-fit block is pushed into the inside of the snap-fit groove, thereby achieving the snap-fit installation of the mounting block and thus achieving the purpose of installing the caster. By using the top rod extending to the outside, pressing the top rod pushes the snap-fit block to retract, thereby achieving the purpose of releasing the snap-fit, so that the caster can be disassembled and assembled by the user according to their needs.
[0013] 2. By setting return springs inside both sides of the mounting block, the limit blocks on both sides of the top rod are pushed to reset using the return springs. This allows the top rod to be pushed back to its original position after the top rod is pressed to release the locking state and the casters are removed, thus preventing the top rod from remaining in the slot and affecting the stable locking between the locking block and the slot. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0015] Figure 2 This is a schematic diagram of the bottom structure of the bag according to this utility model;
[0016] Figure 3 This is a schematic diagram of the caster structure of this utility model;
[0017] Figure 4 This is a schematic diagram of the support block structure of this utility model;
[0018] Figure 5 This is a schematic diagram of the internal structure of the mounting block of this utility model.
[0019] In the diagram: 1. One-piece luggage body; 2. Pull rod; 3. Tray; 4. Support block; 5. Guide groove; 6. Snap-fit block; 7. Limiting block; 8. Shrink groove; 9. Limiting groove; 10. Snap-fit spring; 11. Caster; 12. Bearing; 13. Mounting block; 14. Mounting groove; 15. Guide block; 16. Snap-fit groove; 17. Top rod; 18. Return spring. Detailed Implementation
[0020] 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.
[0021] Please see Figure 1-5 This utility model provides a technical solution for a one-piece suitcase with detachable casters: it includes a one-piece suitcase body 1, support blocks 4, casters 11, and mounting blocks 13. A tray 3 is fixedly installed on the bottom of the one-piece suitcase body 1, and the tray 3 is fixedly connected to the bottom of the one-piece suitcase body 1. Support blocks 4 are fixedly installed around the bottom of the tray 3. Guide grooves 5 are opened on both sides of the bottom end of the support blocks 4. A retractable snap-fit block 6 is set in the middle of the guide groove 5. Mounting blocks 13 are set on the outer periphery of the support blocks 4. The bottom of the mounting blocks 13 is movably connected to the casters 11 through bearings 12. A mounting block 13 is opened on one side of the top of the mounting blocks 13. Mounting slot 14, with guide blocks 15 fixedly installed on both sides inside the mounting slot 14. A slot 16 is opened in the middle of the guide block 15. The snap-fit block 6 extends into the slot 16 and forms a snap-fit state with it. Through the mounting slot 14 opened in the mounting block 13, in conjunction with the guide block 15 and the slot 16 in the middle, the support block 4 can be horizontally spliced with the inside of the mounting slot 14. The guide groove 5 fits with the guide block 15 to achieve the purpose of limiting the position. Then, the retractable snap-fit block 6 is snapped into the inside of the slot 16 to achieve the purpose of snap-fit fixation, thereby realizing the installation of the snap-fit block 6, so as to facilitate subsequent disassembly.
[0022] Specifically, a push rod 17 is slidably disposed inside the inner wall of the slot 16. One end of the push rod 17 is compressed into the inside of the slot 16, and the other end of the push rod 17 passes through the housing of the mounting block 13 and extends to its outside. When disassembly is required, the push rods 17 on both sides of the outside of the mounting block 13 are pressed to move them into the inside of the slot 16. The end of the push rod 17 is used to squeeze the locking block 6, causing the locking block 6 to retract into the inner wall of the guide groove 5, thereby achieving the purpose of releasing the locking. Then, the mounting block 13 is slid laterally to achieve the purpose of disassembling the mounting block 13 and its bottom caster 11.
[0023] Specifically, a shrinkage groove 8 is provided in the middle of the guide groove 5, and a snap-fit spring 10 is provided inside the shrinkage groove 8. One end of the snap-fit block 6 extends into the interior of the shrinkage groove 8 and is slidably connected to its inner wall. The end of the snap-fit block 6 extending into the shrinkage groove 8 is fixedly connected to one end of the snap-fit spring 10. An arc-shaped inclined surface is provided on one side of the snap-fit block 6 extending into the guide groove 5. By utilizing the arc-shaped inclined surface on one side of the snap-fit block 6, when the snap-fit block 6 is released from the guide block 15, the arc-shaped inclined surface on the snap-fit block 6 is pressed, forcing the snap-fit block 6 to shrink, so as to facilitate quick installation.
[0024] Specifically, the inner walls on both sides of the shrinkage groove 8 are provided with limiting grooves 9, and the snap-fit block 6 extends into the shrinkage groove 8 and is provided on both sides with limiting blocks 7. The limiting blocks 7 extend into the limiting groove 9 and are slidably connected to its inner wall.
[0025] Specifically, the inner sides of the housing of the mounting block 13 and the middle of the top rod 17 are respectively provided with limiting grooves 9 and limiting blocks 7. The limiting grooves 9 opened inside the inner walls of the two sides of the mounting block 13 are provided with reset springs 18. One end of the reset spring 18 is fixedly connected to the limiting block 7 on the top rod 17.
[0026] Specifically, a pull rod 2 is provided on the outer side of the one-piece luggage body 1, and the pull rod 2 is fixedly installed on the outer side of the one-piece luggage body 1.
[0027] In this embodiment, during use, the mounting block 13 and the support block 4 are spliced by inserting the mounting groove 14 on the mounting block 13 and the guide blocks 15 on both sides of the mounting groove 14 into the guide groove 5 on the support block 4. The locking block 6 in the guide groove 5 is then locked into the locking groove 16 in the middle of the guide block 15 to achieve locking and fixing between the support block 4 and the mounting block 13, thereby installing the caster 11. When it is necessary to disassemble, the push rods 17 on both sides of the outer side of the mounting block 13 are pressed to move it into the locking groove 16. The end of the push rod 17 pushes the locking block 6 in the locking groove 16 to retract into the shrinkage groove 8 and compresses the locking spring 10 until the locking block 6 is completely disengaged from the locking groove 16, thereby releasing the locking purpose. Then, the mounting block 13 is slid laterally so that the guide blocks 15 in the mounting block 13 gradually disengage from the guide grooves 5 on both sides of the outer side of the support block 4, thereby disassembling the caster 11 so that the user can disassemble and use it according to their needs.
[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A detachable, one-piece suitcase, comprising a one-piece suitcase body (1), a support block (4), casters (11), and a mounting block (13), characterized in that: The bottom of the integrated bag body (1) is fixedly installed with a tray (3). The tray (3) is fixedly connected to the bottom of the integrated bag body (1). Support blocks (4) are fixedly installed around the bottom of the tray (3). Guide grooves (5) are opened on both sides of the bottom end of the support block (4). A retractable snap-fit block (6) is provided in the middle of the guide groove (5). An installation block (13) is provided on the outer periphery of the support block (4). A caster (11) is movably connected to the bottom of the installation block (13) through a bearing (12). An installation groove (14) is opened on one side of the top of the installation block (13). Guide blocks (15) are fixedly installed on both sides of the inside of the installation groove (14). A slot (16) is opened in the middle of the guide block (15). The snap-fit block (6) extends into the inside of the slot (16) and forms a snap-fit state with it.
2. A detachable caster integrated bag according to claim 1, characterized in that: A push rod (17) is slidably disposed inside the inner wall of the slot (16). One end of the push rod (17) is compressed into the inside of the slot (16), and the other end of the push rod (17) passes through the housing of the mounting block (13) and extends to its outside.
3. A detachable caster integrated bag according to claim 1, characterized in that: A shrinkage groove (8) is provided in the middle of the guide groove (5). A snap-fit spring (10) is provided inside the shrinkage groove (8). One end of the snap-fit block (6) extends into the inside of the shrinkage groove (8) and is slidably connected to its inner wall. One end of the snap-fit block (6) extending into the shrinkage groove (8) is fixedly connected to one end of the snap-fit spring (10). An arc-shaped inclined surface is provided on one side of the snap-fit block (6) extending into the guide groove (5).
4. A detachable caster integrated bag according to claim 3, characterized in that: Limiting grooves (9) are provided on the inner walls of both sides of the shrinkage groove (8). The snap-fit block (6) extends into the shrinkage groove (8) and is provided on both sides of the limiting block (7). The limiting block (7) extends into the limiting groove (9) and is slidably connected to its inner wall.
5. A detachable caster integrated bag according to claim 1, characterized in that: Limiting grooves (9) and limiting blocks (7) are respectively provided inside the two side housings of the mounting block (13) and the middle end of the top rod (17). A reset spring (18) is provided inside the limiting grooves (9) opened inside the inner walls of the two sides of the mounting block (13). One end of the reset spring (18) is fixedly connected to the limiting block (7) on the top rod (17).
6. A detachable caster integrated bag according to claim 1, characterized in that: A pull rod (2) is provided on the outer side of the integrated bag body (1), and the pull rod (2) is fixedly installed on the outer side of the integrated bag body (1).