Luggage trundle assembling structure

Abstract

The utility model relates to a luggage trundle assembly structure, which comprises a trundle seat part and a trundle which are arranged on a luggage body, the trundle comprises an installation tray and a trundle body installed on the installation tray, the top of the installation tray is provided with a clamping tenon in a protruding mode, the trundle seat part is provided with a mortise and tenon joint part, and the mortise and tenon joint part comprises a mortise and tenon joint leading-in hole. The tenon-and-mortise guide groove is connected to one side of the tenon-and-mortise guide hole, the clamping wall is arranged at the tail end of the tenon-and-mortise guide groove, the clamping tenon comprises a protruding column protruding on the installation tray and a head portion arranged at the top end of the protruding column, and the head portion is configured to penetrate through the tenon-and-mortise guide hole and is in stopping connection with the edge of the tenon-and-mortise guide groove so as to prevent the clamping tenon from exiting from the tenon-and-mortise guide groove in the axial direction. The head portion of the clamping tenon penetrates through the mortise and tenon guide-in hole, then slides to the tail end along the mortise and tenon guide groove and is clamped on the clamping wall, a lower supporting wall which is matched with the head portion to enable the head portion to be clamped on the clamping wall is arranged on the installation tray, and a locking component which is configured to enable the clamping tenon to be clamped on the clamping wall is further included. The device has the advantage of simplicity and rapidness in disassembly.

Description

Technical Field

[0001] This utility model relates to the field of luggage technology, specifically to an assembly structure for fixing and mounting luggage casters and luggage bodies. Background Technology

[0002] Suitcases have become a widely used daily necessity. Traditional suitcases use a method where the casters are installed by placing a positioning groove on the suitcase body (usually at the bottom corner), with multiple screw holes in the groove. The mounting tray for the casters also has multiple screw holes. The screws pass through the screw holes and connect to the screw holes on the mounting tray, thus securing the casters. This method of using multiple screws to tighten and lock the casters has the drawback of being inconvenient to assemble and disassemble. Summary of the Invention

[0003] The purpose of this invention is to overcome the defects of the existing technology and provide a simple and quick assembly structure for luggage casters.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A luggage caster assembly structure includes a caster seat and a caster on the luggage body. The caster includes a mounting tray and a caster body mounted on the mounting tray. The mounting tray has a protruding tenon on its top. The caster seat has a mortise and tenon joint, including a mortise and tenon inlet hole, a mortise and tenon guide groove connected to one side of the mortise and tenon inlet hole, and a locking wall at the end of the mortise and tenon guide groove. The tenon includes a protruding post on the mounting tray and a head at the top of the protruding post. The head is configured to pass through the mortise and tenon inlet hole and stop at the edge of the mortise and tenon guide groove to prevent the tenon from axially exiting the mortise and tenon guide groove. After passing through the mortise and tenon inlet hole, the head slides along the mortise and tenon guide groove to its end and is locked onto the locking wall. The mounting tray has a lower support wall that cooperates with the head to lock it onto the locking wall. The structure also includes a locking member configured to hold the tenon locked onto the locking wall.

[0006] Preferably, the upper edge of the tenon guide groove has a locking boss, the top side of the locking boss has a locking wall corresponding to the end of the tenon guide groove, and a guide slope extending along the tenon guide groove and gradually rising from the end near the tenon guide hole toward the locking wall.

[0007] Preferably, the protrusion of the tenon is provided with a shoulder surface that forms the lower support wall.

[0008] Preferably, the mounting tray is provided with at least two tenons, and the corresponding caster seat is provided with tenon and mortise parts that correspond to and cooperate with the tenons.

[0009] Preferably, the mounting tray is fan-shaped, and the fixing part of the mounting tray for mounting the caster body corresponds to the apex of the fan shape. The mounting tray is provided with 5 tenons distributed in a fan shape.

[0010] Preferably, the locking member is configured to automatically lock when the mounting tray slides to the position where the latch is engaged with the locking wall. The locking member has an elastic locking force that drives the locking member to lock automatically and an unlocking operation part that can be exposed inside the caster seat for unlocking the locking member.

[0011] Preferably, the locking component includes elastic locking feet and locking holes respectively disposed at the bottom end of the caster seat and the top surface of the mounting tray. The elastic locking feet can elastically deform in the direction corresponding to the axial direction of the locking tenon. The elastic locking feet include a connecting part that can elastically deform to provide elastic locking force, and a buckle protrusion formed on the connecting part. When the mounting tray slides to the position where the locking tenon is locked in the locking wall, the buckle protrusion engages with the locking hole to complete the automatic locking of the locking component.

[0012] Preferably, the elastic locking foot is formed on the caster seat, the caster seat has a through locking head receiving hole, one end of the connecting part of the elastic locking foot is connected to the edge of the locking head receiving hole, the locking protrusion of the elastic locking foot protrudes out of the locking head receiving hole, and the locking hole is recessed on the top surface of the mounting tray.

[0013] Preferably, a push-top step groove is provided at the free end of the elastic clamping foot, and a side gap is provided between the edge of the clamping head receiving hole and the free end of the elastic clamping foot for inserting a tool into the push-top step groove.

[0014] Preferably, the locking member includes at least two elastic locking feet and locking holes, with the locking holes and elastic locking feet corresponding to each other.

[0015] By adopting the above technical solution, the tenon passes through the mortise and tenon guide hole of the caster seat and is pushed in and clamped to the caster seat. After clamping, it is locked by the locking component. This method has the advantages of convenient assembly and high efficiency. Furthermore, the elastic automatic locking component further simplifies and facilitates the assembly operation. The overall structure is simple and compact. Moreover, the multiple tenons form multiple clamping points, which further ensures a firm and reliable installation and convenient positioning during assembly.

[0016] The present invention will now be further described with reference to the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the assembly structure of the luggage casters of this utility model (only the caster seat of the luggage body is shown in the figure).

[0018] Figure 2 This is a diagram showing the state of the tenon passing through the mortise and tenon guide hole of this utility model;

[0019] Figure 3 This is the three-dimensional view of the assembled structure of the luggage casters of this utility model after being cut apart;

[0020] Figure 4 This is a schematic diagram of the structure of the mounting tray of this utility model;

[0021] Figure 5 This is a structural schematic diagram of the caster seat portion of the housing of this utility model from a bottom view. Detailed Implementation

[0022] See appendix Figures 1-5 This utility model discloses a luggage caster assembly structure, including a caster seat 1 on the luggage body and a caster. The caster includes a mounting tray 2 and a caster body 3 mounted on the mounting tray 2. The mounting tray 2 has a protruding tenon 21 on its top. The caster seat 1 has a mortise and tenon joint, which includes a mortise and tenon guide hole 11, a mortise and tenon guide groove 12 connected to one side of the mortise and tenon guide hole 11, and a locking wall 13 located at the end of the mortise and tenon guide groove 12. The tenon 21 includes a protruding post 211 on the mounting tray 2 and a head 212 at the top of the protruding post 211. The head 212 is configured to pass through. The tenon guide hole 11 and the edge stop of the tenon guide groove 12 prevent the tenon 21 from axially exiting the tenon guide groove 12. This prevents the tenon 21 from falling out during sliding along the tenon guide groove 12, facilitating assembly. After the head 212 of the tenon 21 passes through the tenon guide hole 11, it slides along the tenon guide groove 12 to its end and is locked into the locking wall 13. The mounting tray 2 has a lower support wall 213 that mates with the head 212 to lock the head 212 into the locking wall 13. The protrusion 211 of the tenon 21 has a shoulder surface that forms the lower support wall 213. Figure 3 and Figure 4 The protruding post shown is a stepped shaft. This forms a lower support wall directly at the location of the tenon, creating a clamping and fixing mechanism at the tenon position. The structure is simple and the clamping is reliable. The lower support wall is designed to support the mounting tray on the caster seat when the head of the tenon is engaged with the clamping wall. Therefore, the lower support wall can be offset from the head of the tenon and set on the mounting tray.

[0023] To ensure a firm and reliable tenon joint, the mounting tray 2 is provided with at least two tenons 21, and the corresponding caster seat 1 is provided with tenons that mate with the tenons 21 one by one. Furthermore, the mounting tray 2 is fan-shaped, with the fixing part 22 for mounting the caster body 3 located at the apex of the fan. Five tenons 21 are distributed in a fan shape on the mounting tray, with two tenons 21 at the apex and three tenons 21 along the edge of the fan. This ensures reliable and stable installation; and with at least two tenons, the mounting tray can be positioned more easily on the caster mounting part. The use of numerous small tenons provides multiple locking points, ensuring a firm and reliable caster installation. Especially with the design of directly forming a lower support wall on the tenons, a simpler structure is achieved while still reliably fixing the mounting tray. Therefore, a single tenon design is also possible, but it suffers from insufficient fixing reliability and requires a larger tenon size, causing processing difficulties.

[0024] The upper edge of the tenon guide groove 12 has a locking boss 14. It should be noted that the direction in which the tenon 21 is inserted into the tenon guide hole 11 (the x1 direction of the X-axis shown in the figure) is upward. The starting end of the tenon guide hole 11 for the tenon 21 to be inserted is the lower end, and the opposite end is the upper end. The "upper end of the tenon guide groove" is the end of the tenon guide groove 12 corresponding to the upper end of the tenon guide hole 11. The top side of the locking boss 14 has the locking wall 13 corresponding to the end of the tenon guide groove 12, and a guide slope surface 141 extending along the tenon guide groove 12 and gradually rising from the end near the tenon guide hole 11 toward the locking wall 13. When the tenon 21 slides along the mortise and tenon guide groove 12, the head 212 of the tenon 21 is guided by the guide ramp 141 into the clamping wall 13 position to clamp, ensuring a smooth and reliable assembly process. During this process, the tenon 21 drives the mounting tray 2 to rise and engage with the caster mounting part 1, achieving reliable positioning of the mounting tray 2 on the caster seat 1, resulting in a tighter fit between the mounting tray 2 and the caster seat 1. In particular, the bottom of the caster seat 1 is usually recessed with a positioning groove 10, and the periphery of the mounting tray 2 has a flange 23 that engages with the side opening of the positioning groove 10. With the above design, the mounting tray 2 can gradually be recessed into the positioning groove 10 (e.g., Figures 2 to 1 (The state change process) to achieve the advantages of tight and reliable fit between the flange and the side opening of the positioning groove. Therefore, in some designs, the clamping wall can be designed to be raised at the upper end of the tenon guide groove without clamping boss, and the thickness is increased at the bottom end of the tenon guide groove. In this way, when the mounting tray is clamped and fixed by the tenon, the mounting tray does not lift, and the mounting tray and the caster seat cannot fit better, but have a larger gap.

[0025] Casters are supporting components for moving luggage. Under stress, they need to be reliably positioned on the luggage body. Therefore, as an essential design feature, a locking member configured to hold the latch 21 fastened to the locking wall 13 is also included. Thus, it is necessary for the locking member to lock the mounting tray when it is fastened to the caster seat via the latch. This locking member can be a single screw connecting the mounting tray and the caster seat, a pin, a stop block inserted into the mortise and tenon guide hole that engages with the latch stop, or a snap-fit ​​structure, etc. (It should be noted here that although the locking member may involve the use of screws or other fasteners, with the cooperation of the latch and mortise in this invention, the screw only needs to provide a position holding function, and the number of screws used can be greatly reduced compared to the conventional method. Furthermore, the installation operation is performed after the mounting tray is installed into the caster seat, and the corresponding assembly position is already fixed, making the operation simpler and more convenient.)

[0026] To facilitate caster installation, the locking component is preferably configured to automatically lock when the mounting tray 2 slides to the position where the tenon 21 engages with the locking wall 13. The locking component has an elastic locking force that drives the automatic locking and an unlocking operation part exposed inside the caster seat 1 for unlocking the locking component. Thus, after the mounting tray is secured to the caster seat by the tenon, the locking action of the locking component is completed, thus completing the entire assembly process and making caster installation more convenient. For disassembly, the locking component releases its latch, allowing the caster to be pushed, the tenon to be pushed into the mortise and tenon guide hole, and then pulled out, making disassembly also relatively convenient.

[0027] As a simple and reliable embodiment of this utility model, the locking component includes elastic locking feet 15 and locking holes 24 respectively disposed at the bottom end of the caster seat 1 and the top surface of the mounting tray 2. The elastic locking feet 15 are elastically deformable in the direction corresponding to the axial direction of the locking tenon 21. The elastic locking feet 15 include a connecting part 151 that is elastically deformable to provide elastic locking force, and a buckle protrusion 152 formed on the connecting part 151. When the mounting tray 2 slides to the position where the locking tenon 21 is engaged with the locking wall 13, the buckle protrusion 152 engages with the locking hole 24 to complete the automatic locking of the locking component. Under this design, the elastic locking feet and locking holes are easier to process and form, and the fit is more reliable. This design is similar to the design of existing buckle structures or other locking components with elastic automatic locking functions, such as spring pins. This design, combined with the clamping boss forming a clamping wall on the upper edge of the mortise and tenon guide groove, allows the tenon to be inserted into the mortise guide hole during assembly without the need to press against the elastic locking foot. At this point, the elastic locking foot effectively limits the insertion depth of the tenon, preventing over-insertion. As the tenon slides along the mortise and tenon guide groove, the mounting tray is gradually lifted, and the bottom of the mounting tray and caster seat gradually approach each other. The elastic locking foot is gradually pressed and stores energy until the tenon is locked in place. The locking protrusion of the elastic locking foot aligns with the locking hole and engages to complete the locking. Preferably, the locking component includes at least two elastic locking feet 15 and locking holes 24, with each locking hole 24 corresponding to one of the elastic locking feet 15. The design of at least two locking points ensures reliable locking.

[0028] To further optimize the layout and facilitate processing, the elastic locking foot 15 is formed on the caster seat 1. The caster seat 1 has a through locking head receiving hole 16. One end of the connecting part 151 of the elastic locking foot 15 is connected to the edge of the locking head receiving hole 16. The locking protrusion 152 of the elastic locking foot 15 protrudes from the locking head receiving hole 16, and the locking hole 24 is recessed on the top 2 end face of the mounting tray. Alternatively, the elastic locking foot can be formed on the mounting tray, with the locking hole corresponding to the caster seat. However, this results in a less compact structure and inconvenient forming process. For example, the mounting tray needs to create a space to provide a location for the elastic locking foot, or a through hole needs to be made on the mounting tray, which would compromise the neat appearance of the mounting tray.

[0029] A push-top step groove 153 is provided at the free end of the elastic locking foot 15, which constitutes the unlocking operation part. There is a side gap 161 between the edge of the locking head receiving hole 16 and the free end of the elastic locking foot, allowing a tool to be inserted into the push-top step groove 153. In this way, a tool (such as a screwdriver or other rod-shaped or strip-shaped tool) can be inserted into the push-top step groove along the gap between the locking head receiving hole and the elastic locking foot. Then, the tool pries the elastic locking foot, lifting the locking protrusion of the elastic locking foot out of the locking hole to complete the unlocking.

Claims

1. A luggage caster assembly structure, comprising a caster seat and a caster on the luggage body, wherein the caster includes a mounting tray and a caster body mounted on the mounting tray, characterized in that: The mounting tray has a protruding tenon on its top and a tenon portion on the caster seat. The tenon portion includes a tenon guide hole, a tenon guide groove connected to one side of the tenon guide hole, and a locking wall at the end of the tenon guide groove. The tenon includes a protruding post on the mounting tray and a head at the top of the protruding post. The head is configured to pass through the tenon guide hole and stop at the edge of the tenon guide groove to prevent the tenon from exiting the tenon guide groove axially. After the head of the tenon passes through the tenon guide hole, it slides along the tenon guide groove to the end and is locked in the locking wall. The mounting tray has a lower support wall that cooperates with the head to cause the head to be locked in the locking wall. It also includes a locking member configured to keep the tenon locked in the locking wall.

2. The luggage caster assembly structure according to claim 1, characterized in that: The upper edge of the tenon guide groove has a locking boss, the top side of the locking boss has a locking wall corresponding to the end of the tenon guide groove, and a guide slope extending along the tenon guide groove and gradually rising from the end near the tenon guide hole toward the locking wall.

3. The luggage caster assembly structure according to claim 2, characterized in that: The protrusion of the tenon is provided with a shoulder surface that forms the lower support wall.

4. The luggage caster assembly structure according to claim 1, 2, or 3, characterized in that: The mounting tray is provided with at least two tenons, and the corresponding caster seat is provided with tenon and mortise parts that correspond to and cooperate with the tenons.

5. The luggage caster assembly structure according to claim 4, characterized in that: The mounting tray is fan-shaped, and the fixing part of the mounting tray for mounting the caster body corresponds to the apex of the fan shape. There are 5 tenons distributed in a fan shape on the mounting tray.

6. The luggage caster assembly structure according to claim 1, 2, or 3, characterized in that: The locking member is configured to automatically lock when the mounting tray slides to the position where the latch is engaged with the locking wall. The locking member has an elastic locking force that drives the locking member to lock automatically and an unlocking operation part that can be exposed inside the caster seat for unlocking the locking member.

7. The luggage caster assembly structure according to claim 1, 2, or 3, characterized in that: The locking component includes elastic locking feet and locking holes respectively disposed at the bottom end of the caster seat and the top surface of the mounting tray. The elastic locking feet can elastically deform in the direction corresponding to the axial direction of the locking tenon. The elastic locking feet include a connecting part that can elastically deform to provide elastic locking force, and a buckle protrusion formed on the connecting part. When the mounting tray slides to the position where the locking tenon is locked in the locking wall, the buckle protrusion engages with the locking hole to complete the automatic locking of the locking component.

8. The luggage caster assembly structure according to claim 7, characterized in that: The elastic locking foot is formed on the caster seat, which has a through locking head receiving hole. One end of the connecting part of the elastic locking foot is connected to the edge of the locking head receiving hole. The locking protrusion of the elastic locking foot protrudes from the locking head receiving hole, and the locking hole is recessed on the top surface of the mounting tray.

9. The luggage caster assembly structure according to claim 8, characterized in that: A push-top step groove is provided at the free end of the elastic clamping foot, and a side gap is provided between the edge of the clamping head receiving hole and the free end of the elastic clamping foot for inserting a tool into the push-top step groove.

10. The luggage caster assembly structure according to claim 7, characterized in that: The locking component includes at least two elastic locking feet and locking holes, with the locking holes and elastic locking feet corresponding to each other.

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