A detachable luggage caster

Abstract

The application relates to the field of detachable connection of casters, in particular to a detachable luggage caster which comprises a base, a caster assembly and a lock catch assembly, the base is provided with a containing groove and a through hole, the caster assembly comprises a caster connecting shaft provided with an annular groove on an outer wall, the caster connecting shaft penetrates out of the bottom of the base and is exposed on the upper surface of the base, the lock catch assembly comprises a sliding buckle and an elastic piece which are both arranged in the containing groove, the sliding buckle is slidably arranged on the top of the elastic piece in the containing groove, the elastic piece is connected with the groove wall of the containing groove and the sliding buckle at two ends respectively, a through hole is arranged in the bottom of the sliding buckle and is exposed on the lower surface of the base, a locking socket is arranged on the sliding buckle and can be movably connected with the annular groove. The caster can improve the use convenience of the luggage caster, ensure that the caster can be flexibly disassembled and assembled, and improve the installation stability of the spring and the installation safety of the unlocking trigger structure of the caster.

Description

Technical Field

[0001] This application relates to the field of detachable caster connections, and more particularly to a detachable suitcase caster. Background Technology

[0002] In modern travel, suitcases play a crucial role. With the acceleration of globalization and the booming development of the tourism industry, people are traveling more frequently and demanding greater convenience. As a key tool for carrying travel items, the design of a suitcase directly impacts the travel experience. The advent of detachable casters is a significant milestone in suitcase development. It breaks the limitations of traditional non-detachable casters, easily addressing issues like caster damage or replacement needs, improving practicality and flexibility, saving replacement costs, reducing resource waste, and making suitcase production and transportation more convenient, better adapting to diverse market demands. To achieve detachable casters, existing suitcase casters typically consist of a base, a caster connecting axle, a caster frame, and the caster itself. The lower part of the caster frame connects to the wheel, while the upper part is rotatably connected to the base via the caster connecting axle. The wheel can rotate relative to the connecting seat, enabling the suitcase to move. The base has a horizontal accommodating cavity at its top, within which a guide groove is installed. A movable locking element is mounted on the guide groove, and a spring is positioned between the locking element and the guide groove. One end of the spring is located within the guide groove, and the locking element and guide groove restrict the position of both ends of the spring. A through hole is provided on the outer side of the base. The unlocking trigger mechanism for the locking element is an unlocking lever, one end of which extends through the through hole onto the outer side of the base for easy access and locking by the user. This structure, to a certain extent, enables the casters to be detachable, allowing them to be replaced as needed.

[0003] However, existing suitcase caster structures still have significant drawbacks in practical use. Firstly, during caster operation, because the spring is only positioned at one end within the guide groove, and the position of the spring's ends is limited solely by the locking mechanism and the guide groove, this constraint method is not robust enough. The spring may bend, misalign, or even detach vertically, affecting the normal movement of the suitcase and potentially causing the caster to accidentally fall off. Secondly, because the control lever is located on the outer side of the connecting base, it is easily activated accidentally in crowded or poorly shaped environments, greatly increasing the probability of the wheel coming loose, causing inconvenience and safety hazards for the user. Utility Model Content

[0004] To improve the ease of use of luggage casters, ensure that the casters can be flexibly disassembled and assembled, and improve the installation stability of the springs and the installation safety of the caster unlocking trigger structure, this application provides a detachable luggage caster.

[0005] This application provides a detachable suitcase caster, including a base, a caster assembly, and a locking assembly. The base has a receiving groove on its top. The caster assembly includes a caster connecting shaft with an annular groove on its outer wall. The caster connecting shaft extends from the bottom of the base to the annular groove, which is exposed on the upper surface of the base. The locking assembly includes a sliding latch and an elastic member, both disposed in the receiving groove. The sliding latch slides within the receiving groove. One end of the elastic member is connected to the groove wall of the receiving groove, and the other end is connected to the sliding latch. The sliding latch covers the top of the elastic member. The bottom of the receiving groove has a through hole, and at least a portion of the bottom of the sliding latch passes through the through hole to the lower surface of the base. The sliding latch has a locking slot that can engage with the annular groove. By adopting the above technical solution, the caster connecting shaft extends from the bottom of the base, exposing the annular groove on the upper surface of the base, providing conditions for the sliding latch to engage with the annular groove. The sliding latch and elastic element of the locking assembly are located in the receiving groove. One end of the elastic element is connected to the groove wall, and the other end is connected to the sliding latch, with the sliding latch covering the top of the elastic element. This structural design achieves both the movable engagement function through the sliding latch and a more stable installation of the elastic element within the receiving groove. It provides more stable elasticity to the sliding latch, preventing the elastic element from bending, misaligning, or even falling off in the vertical direction, ensuring the normal movement of the suitcase and reducing the risk of the casters accidentally falling off. Meanwhile, the sliding fastener slides within the receiving groove, with its bottom portion having a through hole exposed on the lower surface of the base. This makes the operation of the sliding fastener more concealed, reducing the probability of accidental activation and wheel detachment in areas with heavy pedestrian traffic or poor road conditions. This improves safety and convenience, achieving a reliable connection and detachable function between the caster and the base, facilitating caster replacement and maintenance. Preferably, the bottom of the receiving groove extends with a partition plate, dividing the receiving groove into a sliding groove and a positioning groove. The bottom of the sliding groove has the through hole, and both the sliding fastener and the elastic element are disposed within the sliding groove. The positioning groove has a positioning block with a positioning hole through which the caster connecting shaft passes, and the sliding fastener abuts against the top of the positioning block. By adopting the above technical solution, this structural design makes the layout of each component more reasonable. The partition plate plays a role in separation and positioning, separating the active areas of the sliding fastener and the elastic element from the positioning area of ​​the caster connecting shaft, avoiding mutual interference. The sliding buckle abuts against the top of the positioning block, further ensuring the stability of the sliding buckle during movement. This allows the caster connecting shaft to better engage with the locking slot on the sliding buckle after passing through the positioning hole, ensuring a stable connection between the caster assembly and the base.Preferably, the sliding latch includes a drive latch and a locking latch. The drive latch has an actuating block passing through the through hole at its bottom. The drive latch also has a limiting groove and a mounting shaft. One end of the elastic element is disposed in the limiting groove, and the other end is connected to the partition plate. The locking latch is mounted on the top of the drive latch via the mounting shaft and covers the top of the elastic element. By adopting the above technical solution, the sliding latch consists of a drive latch and a locking latch. The actuating block passing through the through hole at the bottom of the drive latch allows the user to slide the drive latch within the receiving groove by actuating the block. The drive latch has a limiting groove, one end of the elastic element is disposed in the limiting groove, and the other end is connected to the partition plate. Simultaneously, the locking latch is mounted on the top of the drive latch via the mounting shaft and covers the top of the elastic element. This arrangement effectively limits the elastic element in both the horizontal and vertical directions, ensuring the stability of the caster during use. Furthermore, the driving latch and the locking latch form an integrated linkage structure, which can more reliably drive the locking latch to move when the driving latch is moved. Preferably, the locking latch includes an integrally formed pressing part and a latching part. The pressing part is provided with a mounting hole corresponding to the mounting shaft. The pressing part covers the top of the elastic element, and the latching part abuts against the top of the positioning block. The latching part is provided with a locking slot. By adopting the above technical solution, the integrally formed pressing part and latching part of the locking latch have a simple structure and strong integrity. The pressing part is installed through the mounting hole corresponding to the mounting shaft, which can stably cover the top of the elastic element and prevent the elastic element from shaking, bending, misaligning or even falling off during operation. The latching part abuts against the top of the positioning block and is provided with a locking slot. The locking slot can be movably engaged with the annular groove on the caster connecting shaft, thereby realizing reliable locking and unlocking operations between the caster assembly and the base. Preferably, the locking latch includes an unlocking section, a transition section, and a locking section. The unlocking section, the transition section, and the locking section are connected in sequence to form a closed hole structure. The unlocking section has a hexagonal hole wall, the locking section has an arc-shaped hole wall, and the transition section is a straight plane. The hole diameter of the unlocking section is a, the hole diameter of the locking section is b, the maximum outer wall diameter of the caster connecting shaft is c, and the minimum groove wall diameter of the annular groove is d. Then a > c, c > b > d.By adopting the above technical solution, since the unlocking section, transition section, and locking section of the locking slot are sequentially connected to form a closed hole structure, the aperture 'a' of the unlocking section is larger than the maximum outer wall diameter 'c' of the caster connecting shaft, allowing the caster connecting shaft to smoothly pass through the unlocking section and enter the locking slot. The aperture of the unlocking section refers to its inscribed circle diameter. Because the aperture 'b' of the locking section is smaller than the maximum outer wall diameter 'c' of the caster connecting shaft but larger than the minimum groove wall diameter 'd' of the annular groove, when the caster needs to be installed, after the caster connecting shaft enters the locking slot, it pushes the locking section until the locking section is coaxial with the annular groove. This is because the aperture 'b' of the locking section is smaller than... The maximum outer wall diameter *c* of the caster connecting shaft is greater than the minimum groove wall diameter *d* of the annular groove. Therefore, the snap-fit ​​section can engage with the annular groove, achieving a stable connection between the caster assembly and the base, ensuring the normal use of the suitcase. When the caster needs to be disassembled, by pushing the snap-fit ​​section away from the caster connecting shaft, the caster connecting shaft moves sequentially along the snap-fit ​​section, the transition section, and the unlocking section. Finally, because the aperture *a* of the unlocking section is greater than the maximum outer wall diameter *c* of the caster connecting shaft, the caster connecting shaft can be removed from under the base, thus achieving flexible disassembly of the caster assembly from the base. Preferably, the unlocking section is a 3 / 4 hexagon, the snap-fit ​​section is a 1 / 2 circular arc, and the two ends of the snap-fit ​​section extend along the tangent direction of their endpoints to form the transition section. By adopting the above technical solution, setting the unlocking section as a 3 / 4 hexagon provides a larger opening space for the insertion and removal of the caster connecting shaft, facilitating its smooth entry into the locking slot during insertion. It also allows the caster connecting shaft to easily detach from the unlocking section when the caster needs to be disassembled. Setting the locking section as a 1 / 2 arc allows for a stable locking fit between the locking section and the annular groove of the caster connecting shaft, effectively preventing the caster connecting shaft from accidentally disengaging from the locking section during normal use. The two ends of the locking section extend tangentially to form transition sections, connecting the unlocking and locking sections. This allows the caster connecting shaft to smoothly transition along the straight plane of the transition section when moving from the unlocking to the locking section, or vice versa, avoiding any jamming or jamming. Especially when traveling, if the elastic element fails unexpectedly, the caster connecting shaft will not easily move from the locking section to the unlocking section due to friction between the upper and lower surfaces of the locking section and the wall of the annular groove, allowing the suitcase to still function normally. Preferably, the elastic element is a spring, and the top of the partition plate has a clearance groove for a non-displacement engagement with the spring. By adopting the above technical solution, using a spring as the elastic element, a certain degree of swaying and displacement may occur during the spring's extension and contraction. The clearance groove on the top of the partition plate provides a stable installation space for the spring and facilitates the compact installation of other components, reducing the swaying and displacement of the spring during operation.Preferably, a pressure plate is provided on the top of the base, covering the receiving groove. By adopting the above technical solution, a pressure plate is provided on the top of the base and covers the receiving groove. Since the receiving groove contains components such as sliding fasteners and elastic elements, the pressure plate can not only withstand pressure but also protect these components. The pressure plate can prevent dust, debris, etc., from entering the receiving groove, avoiding these foreign objects from affecting the sliding of the sliding fasteners and the elasticity of the elastic elements, ensuring the normal operation of the locking assembly, and thus ensuring a stable and reliable engagement between the caster connecting shaft and the sliding fasteners, improving the overall stability and service life of the detachable suitcase casters. Preferably, the positioning hole is a polygonal hole, and the outer wall of the caster connecting shaft is provided with a polygonal structure adapted to the wall of the positioning hole. By adopting the above technical solution, since the positioning hole is a polygonal hole, and the outer wall of the caster connecting shaft is provided with a polygonal structure that matches the wall of the positioning hole, the polygonal shape has multiple sides and corners. When the two are engaged, these sides and corners correspond and fit together, preventing the caster connecting shaft from rotating freely within the positioning hole. This effectively avoids relative rotation of the caster connecting shaft within the positioning hole, thus ensuring the stability of the connection between the caster and the base, and improving the reliability and durability of the entire detachable suitcase caster. Preferably, the caster assembly also includes a caster frame and a caster. The bottom of the caster frame is connected to the caster, and the top of the caster frame is rotatably connected to the base via the caster connecting shaft. By adopting the above technical solution, the bottom of the caster frame is connected to the caster, and the top of the caster frame is rotatably connected to the caster connecting shaft. Therefore, the top of the caster frame is rotatably connected to the base via the caster connecting shaft, allowing the caster to rotate relative to the base around the caster connecting shaft. This enables the suitcase to move by rotating the caster, providing users with a convenient way to move and carry their suitcases when traveling.

[0006] In summary, this application includes at least one of the following beneficial technical effects:

[0007] 1. By covering the top of the elastic element with the sliding buckle, and connecting the two ends of the elastic element to the groove wall and the sliding buckle respectively, the elastic element is effectively constrained in the up, down, left and right directions, preventing the spring from bending, misaligning or falling off in the vertical direction, thus ensuring the normal movement of the suitcase and preventing the casters from accidentally falling off.

[0008] 2. By setting a toggle block on the sliding buckle to realize the caster installation locking function and the caster removal unlocking function, since the toggle block is the unlocking trigger structure, by setting the toggle block at the bottom of the base, the phenomenon of accidentally touching the toggle block and causing the wheel to loosen can be avoided in environments with heavy traffic or poor road conditions.

[0009] 3. The outer wall of the caster connecting shaft is provided with an annular groove, and the sliding buckle is provided with a locking slot. The locking slot is a closed hole structure formed by the sequential connection of the unlocking section, the transition section and the locking section. The multi-segment slot structure design can realize the flexible disassembly and removal of the caster assembly from the base, improve the installation stability of the caster, and make the caster less likely to loosen. Attached Figure Description

[0010] Figure 1 This is an exploded view of a detachable suitcase caster according to Embodiment 1;

[0011] Figure 2 This is a structural diagram of a detachable suitcase caster according to Embodiment 1;

[0012] Figure 3 This is a front view of a detachable suitcase caster according to Embodiment 1;

[0013] Figure 4 yes Figure 3 AA cross-section view;

[0014] Figure 5 This is a structural diagram of a locking assembly for a detachable suitcase caster according to Embodiment 1;

[0015] Figure 6 This is an exploded view of a locking assembly for a detachable suitcase caster according to Embodiment 2;

[0016] Figure 7 This is a structural diagram of a locking assembly for a detachable suitcase caster, as described in Embodiment 2.

[0017] Explanation of reference numerals in the attached drawings: 1. Base; 2. Caster assembly; 3. Locking assembly; 4. Inner wheel housing; 11. Receiving groove; 12. Divider plate; 13. Through hole; 14. Positioning block; 15. Pressure plate; 16. Positioning hole; 121. Alternating groove; 21. Caster connecting shaft; 22. Caster frame; 23. Caster; 211. Annular groove; 212. Polygonal structure; 31. Sliding buckle; 32. Elastic element; 311. Drive buckle; 312. Locking buckle; 3111. Actuating block; 3112. Limiting groove; 3113. Mounting shaft; 3121. Pressing part; 3122. Buckling part; 3123. Mounting hole; 3124. Locking slot; 3124a. Unlocking section; 3124b. Transition section; 3124c. Snap-fit ​​section. Detailed Implementation

[0018] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0019] Example 1

[0020] This embodiment provides a detachable suitcase caster, referencing... Figure 1 and Figure 2 It includes a base 1, a caster assembly 2 and a locking assembly 3, wherein the caster assembly 2 is movably engaged with the base 1 through the locking assembly 3, thereby enabling the caster to be detached.

[0021] Specifically, in this embodiment, the base 1 is provided with a receiving groove 11, a partition plate 12, a through hole 13, a positioning block 14, and a pressure plate 15. The receiving groove 11 provides installation space for the locking assembly 3. The receiving groove 11 is located at the top of the base 1, and the partition plate 12 extends upward from the bottom of the receiving groove 11, dividing the receiving groove 11 into a sliding groove and a positioning groove. The locking assembly 3 is located in the sliding groove, and the positioning block 14 is located in the positioning groove. The bottom of the sliding groove is provided with a through hole 13, and the center of the positioning block 14 is provided with a positioning hole 16 for installing the caster assembly 2. Both the partition plate 12 and the positioning block 14 are manufactured integrally with the base 1, which ensures the stability of the structure. The pressure plate 15 is set on the top of the base 1 by screws or other fasteners and covers the receiving groove 11. The pressure plate 15 can prevent dust and debris from entering the receiving groove 11 and avoid these impurities from affecting the normal operation of the locking assembly 3. In particular, the positioning hole 16 is a polygonal hole design with a regular hexagonal hole wall.

[0022] Specifically, the caster assembly 2 in this embodiment includes a caster connecting shaft 21, a caster frame 22, and a caster 23. The bottom of the caster frame 22 is connected to the caster 23, and the top of the caster frame 22 is rotatably connected to the caster connecting shaft 21. The caster connecting shaft 21 passes through the through hole 13 of the base 1 and engages with the locking assembly 3, allowing the caster 23 to rotate relative to the base 1. The caster 23 can be a swivel wheel, which can rotate freely in multiple directions, facilitating the turning and movement of the suitcase and improving its flexibility.

[0023] The caster connecting shaft 21 comprises, from bottom to top, a polygonal structure 212, an annular groove 211, and a support column. The outer walls of the polygonal structure 212 and the support column are both hexagonal, fitting into the walls of the positioning hole 16. The annular groove 211 is a complete circular groove formed on the outer wall of the caster connecting shaft 21. The support column above the annular groove 211 supports other components of the luggage compartment. Specifically, the caster connecting shaft 21 passes through the positioning hole 16 from below the base 1, allowing the polygonal structure 212 to be positioned within the positioning hole 16. The annular groove 211 protrudes from the upper surface of the base 1, allowing for a movable engagement with the locking assembly.

[0024] Reference Figure 3 and Figure 4Specifically, the locking assembly 3 includes a sliding latch 31 and an elastic element 32, both of which are disposed within a sliding groove. The sliding latch 31 includes a driving latch 311 and a locking latch 312. The bottom of the driving latch 311 extends to provide a toggle block 3111 that can pass through the through hole 13 and is exposed on the lower surface of the base 1. The toggle block 3111 is designed in a cuboid shape, which makes it convenient for users to pinch and toggle with their fingers. Compared with other shapes, the cuboid shape has a larger flat surface, increasing the contact area between the fingers and the toggle block 3111, making the operation more stable and convenient.

[0025] Furthermore, the drive latch 311 is also provided with a limiting groove 3112 and a mounting shaft 3113. One end of the elastic element 32 is disposed in the limiting groove 3112, and the other end is connected to the partition plate 12. The function of the limiting groove 3112 is to prevent the elastic element 32 from shifting in the horizontal direction. When the elastic element 32 is subjected to force to expand or contract, the limiting groove 3112 can limit it within a certain range, ensuring that the elastic element 32 is always in the correct position, thereby working stably. The mounting shaft 3113 is used to install the locking latch 312. The mounting shaft 3113 is designed as a cylinder with a smooth surface. This design facilitates the rotation of the locking latch 312 around the mounting shaft 3113, reduces friction during rotation, and makes the rotation of the locking latch 312 smoother.

[0026] Reference Figure 5 The locking buckle 312 includes an integrally formed pressing part 3121 and a buckling part 3122. The pressing part 3121 is provided with a mounting hole 3123 corresponding to the mounting shaft 3113. The pressing part 3121 covers the top of the elastic member 32, providing protection and limiting for the elastic member 32. During the use of the caster 23, the elastic member 32 will continuously expand and contract. The pressing part 3121 can prevent the elastic member 32 from bending, misaligning, or falling off in the vertical direction, ensuring that the elastic member 32 can function normally. The buckling part 3122 is provided with a locking slot 3124. The buckling part 3122 abuts against the top of the positioning block 14, so that the locking slot 3124 of the buckling part 3122 can be located directly above the positioning hole 16.

[0027] Reference Figure 5Specifically, the locking latch 3124 includes an integrally formed unlocking section 3124a, a transition section 3124b, and a locking section 3124c. Both ends of the unlocking section 3124a are connected to the transition section 3124b, and both ends of the locking section 3124c are connected to the transition section 3124b. The unlocking section 3124a, the transition section 3124b, and the locking section 3124c are sequentially connected to form a closed hole structure. The size of this closed hole structure can completely cover the size of the positioning hole 16. The unlocking section 3124a has a regular hexagonal hole wall, the locking section 3124c has an arc-shaped hole wall, and the transition section 3124b is a straight plane. In this embodiment, the unlocking section 3124a is a 3 / 4 regular hexagon, the locking section 3124c is a 1 / 2 arc, and both ends of the locking section 3124c extend along the tangent direction of their endpoints to form the transition section 3124b.

[0028] Wherein, the aperture of the regular hexagonal hole refers to the diameter of the inscribed circle, that is, the diameter of the largest circle that can be completely contained inside the hexagon. In this embodiment, the aperture of the unlocking section 3124a is a, the aperture of the snap-fit ​​section 3124c is b, the maximum outer wall diameter of the caster connecting shaft 21 is c, and the minimum groove wall diameter of the annular groove 211 is d. Therefore, a > c, c > b > d. When the user moves the toggle block 3111 toward the caster connecting shaft 21, the drive latch 311 moves the locking latch 312, causing the caster connecting shaft 21 to be located in the unlocking section 3124a of the locking latch 312. Since the diameter of the hole in the unlocking section 3124a is larger than the maximum outer diameter of the caster connecting shaft 21, the user can rotate the caster 23. When the support column of the caster connecting shaft 21 is exactly diagonally opposite to the wall of the regular hexagonal hole in the unlocking section 3124a, the engaging section 3124c of the locking latch 312 disengages from the annular groove 211 of the caster connecting shaft 21, allowing the caster connecting shaft 21 to freely disengage from the unlocking section 3124a in the locking slot 3124, thus disassembling the caster 23. After the caster 23 is disassembled, the deformation restoring force of the elastic element 32 pushes the sliding locking element to reset. Once the sliding locking component has reset, when the user needs to reinstall the caster 23, they must first move the toggle block 3111 towards the caster connecting shaft 21, causing the drive latch 311 to move the locking latch 312, making the positioning hole 16 coaxial with the unlocking section 3124a of the locking latch 312. Then, after the caster connecting shaft 21 passes through the mounting hole 3123, the toggle block 3111 is released, causing the toggle block 3111 to move the locking latch 312 away from the caster connecting shaft 21, thereby causing the locking section 3124c of the locking latch 312 to slide into a locking state with the annular groove 211 of the caster connecting shaft 21. Since the diameter of the hole of the locking section 3124c is smaller than the maximum outer wall diameter of the caster connecting shaft 21, but larger than the minimum groove wall diameter of the annular groove 211, the annular groove 211 of the caster connecting shaft 21 engages with the locking section 3124c, which can securely lock the caster 23.

[0029] It is worth mentioning that the elastic element 32 in this embodiment is a spring, and the top of the partition plate 12 is provided with a clearance groove 121 for forming a clearance fit with the spring. The partition plate 12 directly snaps into the end of the spring, and the spring abuts against the bottom of the clearance groove 121. The groove depth of the clearance groove 121 is greater than or equal to the diameter of the spring wire, so that when the pressure plate 15 is covered on the base 1, the lower surface of the pressure plate 15 contacts the upper surface of the partition plate 12, making the overall structure more compact, improving the operating stability of the spring, and ensuring that the spring can freely extend and retract. The elastic coefficient of the spring needs to be selected according to actual needs. A suitable elastic coefficient can ensure that the sliding buckle 31 can slide smoothly when subjected to external force, and can return to its original position after the external force disappears, realizing stable locking and unlocking operations.

[0030] The implementation principle of this embodiment is as follows: By setting a receiving groove 11 on the base 1 and installing the locking assembly 3 in the receiving groove 11, the sliding buckle 31 and the annular groove 211 on the caster connecting shaft 21 are used to achieve a movable locking engagement, thus realizing the detachable function of the caster 23. When it is necessary to remove the caster 23, the user moves the actuating block 3111 at the bottom of the drive buckle 311, causing the sliding buckle 31 to slide. The annular groove 211 of the caster connecting shaft 21 moves from the locking section 3124c of the locking slot 3124 to the unlocking section 3124a, and the caster 23 can be removed from the base 1. When it is necessary to install the caster 23, the caster connecting shaft 21 is inserted into the positioning hole 16, and then the actuating block 3111 is moved in the opposite direction, so that the annular groove 211 re-engages into the locking section 3124c, and the caster 23 is locked on the base 1. Meanwhile, the stability of the elastic element 32 is improved by the design of the partition plate 12, positioning block 14, and pressure plate 15. The design of the limiting groove 3112 and locking buckle 312 limits and protects the elastic element 32, preventing the spring from bending, misaligning, or falling off in the vertical direction. In addition, placing the actuating block 3111 at the bottom of the base 1, compared to placing it on the outer side of the base 1, reduces the possibility of accidental activation, improves safety, and enhances the practicality and reliability of the suitcase casters, providing users with a better user experience.

[0031] Example 2

[0032] The difference between this embodiment and Embodiment 1 is that, referring to... Figure 6 and Figure 7An inner wheel housing 4 is also provided on the top of the base 1. A hexagonal slot is provided at the bottom of the inner wheel housing 4. The inner wheel housing 4 is a component located on the inner surface of the suitcase, while the base 1 is a component located on the outer surface of the suitcase. The suitcase shell is located between the inner wheel housing 4 and the base 1. The end of the support column of the caster connecting shaft 21 penetrates the suitcase shell and can be inserted into the hexagonal slot at the bottom of the inner wheel housing 4. This allows the top of the support column to abut against the bottom of the hexagonal slot, and the hexagonal slot and support column are shaped to match, thus supporting the suitcase, enhancing its structural strength, and preventing edge cracking. Everything else is the same as in Embodiment 1.

[0033] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A detachable suitcase caster, characterized in that, The system includes a base (1), a caster assembly (2), and a locking assembly (3). The base (1) has a receiving groove (11) on its top. The caster assembly (2) includes a caster connecting shaft (21), and the outer wall of the caster connecting shaft (21) has an annular groove (211). The caster connecting shaft (21) extends from the bottom of the base (1) to the annular groove (211) exposed on the upper surface of the base (1). The locking assembly (3) includes a sliding buckle (31) and an elastic element (32) both disposed in the receiving groove (11). The sliding buckle (31) is located in the receiving groove (11). The elastic element (32) slides within the groove (11). One end of the elastic element (32) is connected to the groove wall of the receiving groove (11), and the other end is connected to the sliding buckle (31). The sliding buckle (31) covers the top of the elastic element (32). The bottom of the receiving groove (11) is provided with a through hole (13). At least a part of the bottom of the sliding buckle (31) passes through the through hole (13) and is exposed on the lower surface of the base (1). The sliding buckle (31) is provided with a locking slot (3124). The locking slot (3124) can be movably engaged with the annular groove (211).

2. The detachable suitcase caster according to claim 1, characterized in that, The bottom of the receiving groove (11) is provided with a partition plate (12), which divides the receiving groove (11) into a sliding groove and a positioning groove. The bottom of the sliding groove is provided with a through hole (13). The sliding buckle (31) and the elastic member (32) are both provided in the sliding groove. The positioning groove is provided with a positioning block (14). The positioning block (14) is provided with a positioning hole (16) through which the caster connecting shaft (21) can pass. The sliding buckle (31) abuts against the top of the positioning block (14).

3. The detachable suitcase caster according to claim 2, characterized in that, The sliding buckle (31) includes a driving buckle (311) and a locking buckle (312). The bottom of the driving buckle (311) is provided with a toggle block (3111) that passes through the through hole (13). The driving buckle (311) is provided with a limiting groove (3112) and a mounting shaft (3113). One end of the elastic member (32) is provided in the limiting groove (3112), and the other end is connected to the partition plate (12). The locking buckle (312) is provided on the top of the driving buckle (311) through the mounting shaft (3113) and covers the top of the elastic member (32).

4. The detachable suitcase caster according to claim 3, characterized in that, The locking buckle (312) includes an integrally formed pressing part (3121) and a buckling part (3122). The pressing part (3121) is provided with a mounting hole (3123) corresponding to the mounting shaft (3113). The pressing part (3121) covers the top of the elastic member (32). The buckling part (3122) abuts against the top of the positioning block (14). The buckling part (3122) is provided with the locking slot (3124).

5. The detachable suitcase caster according to claim 1, characterized in that, The locking latch (3124) includes an unlocking section (3124a), a transition section (3124b), and a locking section (3124c). The unlocking section (3124a), the transition section (3124b), and the locking section (3124c) are connected in sequence to form a closed hole structure. The unlocking section (3124a) has a hexagonal hole wall, the locking section (3124c) has an arc-shaped hole wall, and the transition section (3124b) is a straight plane. The hole diameter of the unlocking section (3124a) is a, the hole diameter of the locking section (3124c) is b, the maximum outer wall diameter of the caster connecting shaft (21) is c, and the minimum groove wall diameter of the annular groove (211) is d. Therefore, a > c, c > b > d.

6. The detachable suitcase caster according to claim 5, characterized in that, The unlocking segment (3124a) is a 3 / 4 hexagon, the snap-fit ​​segment (3124c) is a 1 / 2 arc, and the two ends of the snap-fit ​​segment (3124c) extend along the tangent direction of their endpoints to form the transition segment (3124b).

7. The detachable suitcase caster according to claim 2, characterized in that, The elastic element (32) is a spring, and the top of the partition plate (12) is provided with a clearance groove (121) for forming a clearance engagement with the spring.

8. The detachable suitcase caster according to claim 1, characterized in that, A pressure plate (15) is provided on the top of the base (1), and the pressure plate (15) covers the receiving groove (11).

9. The detachable suitcase caster according to claim 2, characterized in that, The positioning hole (16) is a polygonal hole, and the outer wall of the caster connecting shaft (21) is provided with a polygonal structure (212) that is adapted to the hole wall of the positioning hole (16).

10. The detachable suitcase caster according to claim 1, characterized in that, The caster assembly (2) also includes a caster frame (22) and a caster (23). The bottom of the caster frame (22) is connected to the caster (23), and the top of the caster frame (22) is rotatably connected to the base (1) through the caster connecting shaft (21).

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