Draw-bar structure for draw-bar box

Abstract

The utility model discloses a draw bar structure for a draw-bar box, which comprises two fixed rods, middle rods are movably inserted in the two fixed rods, upper draw bars are movably inserted in the two middle rods, a grip is fixedly connected between the upper ends of the two upper draw bars, a button is mounted on the grip, and the upper draw bars are movably inserted in the middle rods. The middle rod and the upper pull rod are each internally provided with a buckle piece connected with the button, and the fixing rod and the middle rod are each provided with a plurality of clamping holes corresponding to the buckle pieces. According to the draw-bar box, the draw bar can be stably fixed at the bottom and the top of the draw-bar box, and when the draw-bar box is obliquely dragged, the force borne by the draw bar can be dispersed to the arc-shaped connecting plate and the buckle plate, so that the abrasion of a bar piece of the draw bar can be reduced, and the service life of the draw bar of the draw-bar box is effectively prolonged.

Description

Technical Field

[0001] This utility model relates to the field of trolley case technology, specifically to a trolley case pull rod structure. Background Technology

[0002] A rolling suitcase is a common type of luggage. Rolling suitcases are equipped with casters, making them easier to pull. The retractable handle further enhances the convenience of pulling the suitcase, effectively improving the user's comfort and ease of use.

[0003] The existing suitcase handles are directly fixed to the vertical side of the suitcase. This results in a large and concentrated tension at the connection between the handle and the suitcase when the suitcase is tilted and dragged. Over time, this can damage the connection between the handle and the suitcase, affecting the stability of the connection and reducing the lifespan of the handle. Utility Model Content

[0004] The purpose of this invention is to provide a pull rod structure for a suitcase to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] This utility model provides a pull rod structure for a trolley case, including two fixed rods, each with a middle rod movably inserted inside, and each middle rod with an upper pull rod movably inserted inside. A handle is fixedly connected between the upper ends of the two upper pull rods, and a button is installed on the handle. Each middle rod and upper pull rod has a buckle connected to the button. Multiple locking holes corresponding to the buckles are provided on both the fixed rods and the middle rods. A sleeve is fixedly fitted onto one end of each of the two fixed rods, and a buckle plate is fixedly connected between the two sleeves. The buckle plate has mounting holes for installing a braking system. A connecting cylinder is fixedly fitted onto the other end of each of the two fixed rods. An arc-shaped connecting member is fixedly connected to the outer wall of each connecting cylinder. The bend of the arc-shaped connecting member is rounded, and multiple pin holes are provided at the bottom of the arc-shaped connecting member. Two reinforcing holes are symmetrically provided on the vertical sidewall of the arc-shaped connecting member, and an anti-detachment fastener is fixedly connected to the inner wall of the arc-shaped connecting member.

[0007] Furthermore, the buckle plate includes a horizontal plate and a vertical plate, the horizontal plate being vertically connected to the vertical plate, a first internally threaded tube being symmetrically fixedly connected to the horizontal plate, and two second internally threaded tubes being symmetrically fixedly connected to the vertical plate.

[0008] Furthermore, anti-detachment sleeves are fixedly inserted into both the fixed rod and the intermediate rod.

[0009] Furthermore, the inner wall of the connecting cylinder is fixedly connected with multiple limiting strips, and the connecting cylinder has two threaded holes. Locking screws are threaded into the threaded holes, and the connecting cylinder is fixedly connected to the fixing rod by the locking screws.

[0010] Furthermore, both of the fixed rods have insertion holes on their walls, and positioning pins are fixedly inserted into the insertion holes.

[0011] Furthermore, multiple reinforcing ribs are fixedly connected between the first and second internally threaded tubes and the buckle plate.

[0012] Furthermore, the outer wall of the anti-detachment sleeve is fixedly connected with multiple locking blocks, and the walls of the fixing rod and the intermediate rod are each provided with multiple locking slots corresponding to the locking blocks.

[0013] Furthermore, a braking device is also installed on the buckle plate, and the end of the braking device is connected to the roller device.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This utility model, through the design of a fixed rod, intermediate rod, upper pull rod, handle, button, buckle, buckle hole, sleeve, buckle plate, mounting hole, connecting cylinder, arc-shaped connector, pin hole, reinforcing hole, and anti-detachment buckle, allows for the installation of the pull rod. The buckle plate is fixed to the fixed rod, and the two connecting cylinders on the arc-shaped connector are fixed to the two fixed rods. Then, the arc-shaped connector is fastened to the bottom of the pull rod case, ensuring the anti-detachment buckle on the arc-shaped connector is secured to the bottom of the case. The bolts pass through multiple fasteners on the arc-shaped connector. The pin holes and reinforcement holes securely fix the arc-shaped connector to the bottom of the suitcase. The rounded corners of the arc-shaped connector ensure a tight fit with the vertical sidewalls and bottom of the suitcase. The buckle plate is fixed to the top of the suitcase with screws, thus firmly fixing the pull rod to the bottom and top of the suitcase. When the suitcase is tilted and dragged, the force on the pull rod can be distributed to the arc-shaped connector plate and buckle plate, thereby reducing the wear of the pull rod and effectively improving the service life of the suitcase pull rod. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of this utility model from another perspective;

[0018] Figure 3 This is a side view of the present invention;

[0019] Figure 4 for Figure 1 Schematic diagram of the arc-shaped connector;

[0020] Figure 5 for Figure 1 Schematic diagram of the structure of the center panel;

[0021] Figure 6 for Figure 1 Schematic diagram of the anti-detachment sleeve structure;

[0022] Figure 7 for Figure 1 A schematic diagram of the structure of part A;

[0023] Figure 8 for Figure 2 A structural diagram of section B;

[0024] Figure 9 This is a schematic diagram of the braking device of this utility model;

[0025] Figure 10 This is a schematic diagram of the roller device of this utility model.

[0026] In the diagram: 1. Fixed rod; 2. Intermediate rod; 3. Upper pull rod; 4. Handle; 5. Button; 6. Buckle; 7. Buckle hole; 8. Sleeve; 9. Buckle plate; 10. Mounting hole; 11. Connecting cylinder; 12. Arc-shaped connector; 13. Pin hole; 14. Reinforcing hole; 15. Anti-detachment buckle; 16. Horizontal plate; 17. Vertical plate; 18. First internal threaded tube; 19. Second internal threaded tube; 20. Anti-detachment sleeve; 21. Limiting strip; 22. Threaded hole; 23. Locking screw; 24. Insertion hole; 25. Positioning pin; 26. Reinforcing rib; 27. Buckle block; 28. Buckle groove; 29. ​​Braking device; 30. Roller device. Detailed Implementation

[0027] 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.

[0028] Please see Figure 1-9This utility model provides a pull rod structure for a suitcase, including two fixed rods 1, with a middle rod 2 movably inserted into each of the two fixed rods 1, and an upper pull rod 3 movably inserted into each of the two middle rods 2. A handle 4 is fixedly connected between the upper ends of the two upper pull rods 3, and a button 5 is installed on the handle 4. A buckle 6 connected to the button 5 is installed in both the middle rods 2 and the upper pull rods 3. Multiple locking holes 7 corresponding to the buckles 6 are provided on both the fixed rods 1 and the middle rods 2. A sleeve 8 is fixedly fitted onto one end of each of the two fixed rods 1. A buckle plate 9 is fixedly connected between the two sleeves 8. The buckle plate 9 has a mounting hole 10 for installing a braking system. A connecting sleeve 11 is fixedly sleeved on the other end of each of the two fixing rods 1. An arc-shaped connector 12 is fixedly connected to the outer wall of the two connecting sleeves 11. The bend of the arc-shaped connector 12 is rounded. Multiple pin holes 13 are opened at the bottom of the arc-shaped connector 12. Two reinforcing holes 14 are symmetrically opened on the vertical side wall of the arc-shaped connector 12. An anti-disengagement fastener 15 is fixedly connected to the inner wall of the arc-shaped connector 12.

[0029] In the above embodiment, when installing the pull rod, the buckle plate 9 is fixed to the fixed rod 1, and the two connecting cylinders 11 on the arc-shaped connector 12 are fixed to the two fixed rods 1. Then, the arc-shaped connector 12 is fastened to the bottom of the trolley case, so that the anti-detachment buckle 15 on the arc-shaped connector 12 is fastened to the bottom of the trolley case. The arc-shaped connector 12 is firmly fixed to the bottom of the trolley case by passing screws through the multiple pin holes 13 and reinforcing holes 14 provided on the arc-shaped connector 12. The arc-shaped connector 12 is rounded so that it can fit tightly with the vertical side wall and bottom of the trolley case. The buckle plate 9 is fixed to the top of the trolley case by screws, so that the pull rod can be firmly fixed to the bottom and top of the trolley case. When the trolley case is tilted and dragged, the force on the pull rod can be distributed to the arc-shaped connector 12 and the buckle plate 9, thereby reducing the wear of the pull rod and effectively improving the service life of the trolley case pull rod.

[0030] The buckle plate 9 includes a horizontal plate 16 and a vertical plate 17. The horizontal plate 16 is vertically connected to the vertical plate 17. A first internally threaded tube 18 is symmetrically fixedly connected to the horizontal plate 16, and two second internally threaded tubes 19 are symmetrically fixedly connected to the vertical plate 17. The first internally threaded tube 18 and the second internally threaded tube 19 can cooperate with screws to firmly fix the buckle plate 9 to the trolley case, thereby improving the stability of the connection between the trolley and the trolley case.

[0031] Both the fixed rod 1 and the intermediate rod 2 are fixedly inserted with anti-detachment sleeves 20, which can limit the intermediate rod 2 and the upper pull rod 3, thereby preventing the intermediate rod 2 from detaching from the fixed rod 1 and preventing the upper pull rod 3 from detaching from the intermediate rod 2.

[0032] Multiple limiting strips 21 are fixedly connected to the inner wall of the connecting cylinder 11. Two threaded holes 22 are opened on the connecting cylinder 11, and locking screws 23 are threaded into the threaded holes 22. The connecting cylinder 11 is fixedly connected to the fixing rod 1 by the locking screws 23. The limiting strips 21 can prevent the fixing rod 1 from rotating inside the connecting cylinder 11, and the locking screws 23 can make the connecting cylinder 11 firmly fixed to the fixing rod 1, thereby improving the stability of the tie rod and improving the structural stability of the tie rod.

[0033] Both of the fixed rods 1 have insertion holes 24 on their walls, and positioning pins 25 are fixedly inserted into the insertion holes 24. The positioning pins 25 can position the intermediate rod 2, thereby preventing the intermediate rod 2 from shrinking excessively.

[0034] Multiple reinforcing ribs 26 are fixedly connected between the first internal threaded tube 18 and the second internal threaded tube 19 and the buckle plate 9, which can reinforce the first internal threaded tube 18 and the second internal threaded tube 19, effectively improving the structural strength of the first internal threaded tube 18 and the second internal threaded tube 19, and improving the stability of the buckle plate 9 when it is fixed.

[0035] Multiple limiting strips 21 are fixedly connected to the inner wall of the connecting cylinder 11. Two threaded holes 22 are opened on the connecting cylinder 11. Locking screws 23 are threaded into the threaded holes 22. The connecting cylinder 11 is fixedly connected to the fixing rod 1 by the locking screws 23. The set locking block 27 and the locking groove 28 cooperate with each other to improve the stability of the anti-detachment sleeve 20.

[0036] The buckle plate 9 is also equipped with a braking device 29, which is connected to the roller device 30. The roller device 30 includes a base, on which a first rotating shaft is mounted, and a roller is rotatably mounted on the first rotating shaft. The braking device 29 includes a brake switch. A second rotating shaft is mounted on the base, on which a limit plate is mounted. An elastic element is mounted on one side of the limit plate, and a limit protrusion is provided on the limit plate. Multiple limit grooves are provided on the roller.

[0037] Working principle: When installing the pull rod, fix the buckle plate 9 to the fixed rod 1, fix the two connecting cylinders 11 on the arc-shaped connector 12 to the two fixed rods 1, and then buckle the arc-shaped connector 12 to the bottom of the trolley case, so that the anti-detachment buckle 15 on the arc-shaped connector 12 is buckled to the bottom of the trolley case. By passing screws through the multiple pin holes 13 and reinforcing holes 14 provided on the arc-shaped connector 12, the arc-shaped connector 12 is firmly fixed to the bottom of the trolley case. The arc-shaped connector 12 is rounded so that it can fit tightly with the vertical side wall and bottom of the trolley case. Fix the buckle plate 9 to the top of the trolley case with screws, so that the pull rod can be firmly fixed to the bottom and top of the trolley case. When the trolley case is tilted and dragged, the force on the pull rod can be distributed to the arc-shaped connector 12 and the buckle plate 9, thereby reducing the wear of the pull rod and effectively improving the service life of the trolley case pull rod.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only 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 process, method, article, or apparatus.

[0039] 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 pull rod structure for a suitcase, characterized in that: It includes two fixed rods (1), each fixed rod (1) having a middle rod (2) movably inserted into it, and each middle rod (2) having an upper pull rod (3) movably inserted into it. A handle (4) is fixedly connected between the upper ends of the two upper pull rods (3), and a button (5) is installed on the handle (4). Each middle rod (2) and upper pull rod (3) has a buckle (6) connected to the button (5). Each fixed rod (1) and middle rod (2) has multiple buckle holes (7) corresponding to the buckle (6). Each fixed rod (1) has a sleeve (8) fixedly fitted at one end. (8) A buckle plate (9) is fixedly connected between them. The buckle plate (9) has an installation hole (10) for installing a brake system. The other ends of the two fixed rods (1) are fixedly fitted with connecting cylinders (11). An arc-shaped connector (12) is fixedly connected to the outer wall of the two connecting cylinders (11). The bend of the arc-shaped connector (12) is rounded. Multiple pin holes (13) are opened at the bottom of the arc-shaped connector (12). Two reinforcing holes (14) are symmetrically opened on the vertical side wall of the arc-shaped connector (12). An anti-disengagement buckle (15) is fixedly connected to the inner wall of the arc-shaped connector (12).

2. The pull rod structure for a suitcase according to claim 1, characterized in that: The buckle plate (9) includes a horizontal plate (16) and a vertical plate (17). The horizontal plate (16) is vertically connected to the vertical plate (17). A first internal threaded tube (18) is symmetrically fixedly connected to the horizontal plate (16), and two second internal threaded tubes (19) are symmetrically fixedly connected to the vertical plate (17).

3. The pull rod structure for a suitcase according to claim 2, characterized in that: Both the fixed rod (1) and the intermediate rod (2) are fixedly inserted with anti-detachment sleeves (20).

4. The pull rod structure for a suitcase according to claim 3, characterized in that: The inner wall of the connecting cylinder (11) is fixedly connected with multiple limiting strips (21). The connecting cylinder (11) has two threaded holes (22). Locking screws (23) are threaded into the threaded holes (22). The connecting cylinder (11) is fixedly connected to the fixing rod (1) by the locking screws (23).

5. A pull rod structure for a suitcase according to claim 4, characterized in that: Both of the fixed rods (1) have insertion holes (24) on their walls, and positioning pins (25) are fixedly inserted into the insertion holes (24).

6. The pull rod structure for a suitcase according to claim 5, characterized in that: Multiple reinforcing ribs (26) are fixedly connected between the first internal threaded tube (18) and the second internal threaded tube (19) and the buckle plate (9).

7. A pull rod structure for a suitcase according to claim 6, characterized in that: The outer wall of the anti-detachment sleeve (20) is fixedly connected with multiple locking blocks (27), and the walls of the fixing rod (1) and the intermediate rod (2) are provided with multiple locking slots (28) corresponding to the locking blocks (27).

8. A pull rod structure for a suitcase according to claim 7, characterized in that: A braking device (29) is also installed on the buckle plate (9), and the end of the braking device (29) is connected to the roller device (30).

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