Pull rod

Abstract

This utility model discloses a pull rod, including an inner tube and an outer tube that slide together. The inner tube has a piston buckle, which includes a housing. The housing has a hook, and the end of the inner tube has a hanging block. The side walls of the hook and the hanging block abut against the inner wall of the outer tube. A telescopic groove is provided below the housing, and a locking element is provided in the telescopic groove. The outer wall of the housing and the opening of the telescopic groove are both in contact with the inner side wall of the outer tube. The end of the locking element protrudes from the side of the housing. A slot is provided on the side wall of the outer tube, and a drive groove is provided on the housing. A drive element is provided in the drive groove, and the drive element includes a drive block. A spring is sleeved on the drive block. The tail end of the drive block passes through the connecting opening and extends into the telescopic groove, abutting against the locking element. This utility model changes the structure of the piston buckle and the pull rod, making its structure simpler and more compact, significantly reducing the volume of the pull rod. It has the advantages of small space occupation and high utilization rate, which is in line with the minimalist and fashionable design trend of modern luggage and bags, and can enhance the overall visual effect of the luggage.

Description

Technical Field

[0001] This utility model relates to the field of luggage accessories technology, and more specifically, it relates to a pull rod. Background Technology

[0002] Pull rods are common accessories in luggage, consisting of a handle and a telescopic rod. The telescopic rod is composed of 2-3 nestable tubular sections, and its length is adjusted by locking or unlocking a piston buckle. (See attached instruction manual.) Figure 6 The tube connected to the handle is called the inner tube, which has the smallest diameter. The second or third section is the middle or outer tube, with the diameter gradually increasing from the inner tube to the outer tube. This allows the telescopic rod to fit together when it retracts. Therefore, the diameter of the inner tube directly affects the overall size of the telescopic rod. The inner tube and the middle tube need to be locked together by a piston buckle to maintain the telescopic rod in its extended state. Therefore, the structural design of the piston buckle directly affects the diameter of the inner tube. The minimum width of the cross-section of the existing piston buckle needs to be at least 8mm.

[0003] Existing designs disclose a locking device for a suitcase handle with patent number 99249052.9. Its specification discloses a first locking device 20 (i.e., the piston buckle in this application), including a first locking housing, a built-in spring, an unlocking pin, and other structures. See the attached specification. Figure 1 The first locking device is marked with 20. Components such as the locking block 24 and spring 23 are enclosed within the locking housing 21. To accommodate these components, the locking housing needs to be enlarged to provide more space, thus increasing the overall size of the locking device. The inner tube diameter also needs to be enlarged to match the locking device's assembly, and the middle and outer tubes also enlarge accordingly, directly affecting the overall size of the pull rod. This increased pull rod size leads to increased production costs, a less simple and compact structure, and a larger footprint in luggage. Based on these issues, this application proposes a simple, compact pull rod for luggage that occupies less space. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a simple and compact pull rod for luggage bags that occupies little space.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pull rod, comprising an inner tube and an outer tube, wherein the outer tube is sleeved outside the inner tube and the two are slidably engaged, wherein the end of the inner tube is provided with a piston buckle, the piston buckle comprising a housing, a hook being provided above the housing, the end of the inner tube being provided with a hanging block adapted to the hook, the side walls of the hook and the hanging block abutting against the inner wall of the outer tube, a telescopic groove being provided below the housing, the telescopic groove being provided with a telescopic locking element, and the outer wall surface of the housing and the telescopic groove being... The openings are all fitted to the inner sidewall of the outer tube. The end of the locking member protrudes from the side of the housing. The sidewall of the outer tube is provided with a slot for the end of the locking member to be engaged. The housing is provided with a drive groove above the telescopic groove. A communication port is provided between the drive groove and the telescopic groove. The drive groove is provided with a drive member for driving the end of the locking member to retract into the telescopic groove. The drive member includes a drive block. A spring is sleeved on the drive block. The tail end of the drive block passes through the communication port and extends into the telescopic groove, where it abuts against the locking member.

[0006] The present invention is further configured such that: the through groove in the inner tube includes groove one and groove two, wherein groove two is located at the center of groove one, and the cross-sectional width of groove two is greater than the cross-sectional width of groove one; a transmission rod is inserted in groove two, the transmission rod is slidably fitted in groove two, and its end extends to the drive block for fixed fit.

[0007] The present invention is further configured such that: the locking member includes a locking block and a second spring located at the tail end of the locking block, the second spring driving the end of the locking block to extend outside the telescopic groove and being engaged in the groove of the outer tube.

[0008] The present invention is further configured such that: the hanging block on the inner tube is T-shaped, and hook grooves are formed on both sides thereon, and the hooks on the upper part of the shell are respectively fastened in the hook grooves to be fixed.

[0009] The present invention is further configured such that: the hook above the shell is T-shaped, and hook grooves are formed on both sides thereon, and the hanging blocks on the inner tube are respectively fastened in the hook grooves and fixed.

[0010] By adopting the above technical solution, the structure of the pull rod and piston buckle is optimized and simplified. Through innovative design of the piston buckle shell, the traditional enclosed piston buckle structure is designed as an open type, making its body thinner and lighter. Due to the optimization of the piston buckle structure, its minimum cross-sectional width can be significantly reduced, far below the width requirements of existing technologies. This allows the inner tube connected to the piston buckle to use a smaller diameter, and the reduction in the inner tube diameter leads to a corresponding reduction in the size of the middle and outer tubes. The overall volume of the pull rod is thus significantly reduced, greatly minimizing the space occupied by the pull rod while still meeting its normal functional requirements. For luggage, this means more storage space can be freed up inside the bag, improving the space utilization rate and allowing the bag to hold more items, better meeting users' needs for large-capacity luggage in travel and other scenarios. Attached Figure Description

[0011] Figure 1 This is a partial structural diagram of the present invention; Figure 2 This is an exploded view of the structure of this utility model; Figure 3 This is a top view of the inner tube; Figure 4 This is the first structural state of the present utility model; Figure 5 This is the structural state of the present utility model. Figure 2 ; Figure 6 This is a schematic diagram of the background technology structure; Figure 7 for Figure 2 Enlarged view of point a in the middle.

[0012] 1. Inner tube; 10. Hanging block; 11. Groove 1; 12. Groove 2; 13. Hook groove 1; 2. Outer tube; 20. Card groove; 3. Piston buckle; 30. Housing; 31. Hook; 32. Telescopic groove; 33. Drive groove; 34. Hook groove 2; 4. Locking component; 40. Locking block; 41. Spring 2; 5. Drive block; 50. Spring 1; 6. Transmission rod. Detailed Implementation

[0013] Reference Figures 1 to 7 The embodiments of this utility model will be further described below.

[0014] A pull rod includes an inner tube 1 and an outer tube 2, the outer tube 2 being sleeved on the outer tube 1 and the two slidingly engaged. The inner tube 1 has a piston buckle 3 at its end, the piston buckle 3 including a housing 30, a hook 31 at the top of the housing 30, and a hanging block 10 at the end of the inner tube 1 adapted to the hook 31. The side walls of the hook 31 and the hanging block 10 abut against the inner wall of the outer tube 2. A telescopic groove 32 is provided below the housing 30, and a retractable locking element 4 is provided within the telescopic groove 32. The outer wall surface of the housing 30 and the opening of the telescopic groove 32 are both adjacent to the outer tube 2. The inner walls are fitted together, and the end of the locking member 4 protrudes from the side of the housing. The side wall of the outer tube 2 is provided with a slot 20 for the end of the locking member 4 to be engaged. The housing 30 is provided with a drive groove 33 above the telescopic groove 32. A communication port is provided between the drive groove 33 and the telescopic groove 32. The drive groove 33 is provided with a drive member for driving the end of the locking member 4 to retract into the telescopic groove 32. The drive member includes a drive block 5. A spring 50 is sleeved on the drive block 5. After the tail end of the drive block 5 passes through the communication port, it extends into the telescopic groove 32 and abuts against the locking member 4.

[0015] The through groove in the inner tube 1 includes groove 11 and groove 12, wherein groove 12 is located at the center of groove 11, and the cross-sectional width of groove 12 is greater than that of groove 11. A transmission rod 6 is inserted into groove 12, and the transmission rod 6 is slidably engaged within groove 12, with its end extending to the drive block 5 for fixed engagement. The locking member 4 includes a locking block 40 and a spring 41 located at the tail end of the locking block 40. The spring 41 drives the end of the locking block 40 to extend outside the telescopic groove 32 and engage in the slot 20 of the outer tube 2.

[0016] Working principle: A telescopic groove 32 is directly set on the surface of the piston buckle 3 housing 30, reducing the volume of the housing 30 and opening the telescopic groove 32 to simplify the structure. During assembly, the tail end of the inner tube 1 cooperates with the hanging block 10 on the housing 30 through the mounting hook 31 to achieve fixed assembly of the piston buckle 3 and the inner tube 1, which has the advantages of simple structure and quick assembly. At the same time, the volume of the inner tube 1 is reduced, and its cross-sectional width can be consistent with the cross-sectional width of the piston buckle 3, achieving a width of 4mm-8mm. After the volume of the inner tube 1 is reduced, in order to avoid affecting its structural strength, the structure of the through groove in the inner tube 1 is improved. The second groove 12 is located at the center of the first groove 11. The second groove 12 is for the transmission rod 6 to pass through, so as to accurately operate the opening of the piston buckle 3, while reducing the hollowing out of the inner tube 1 and enhancing its structural strength. The bottom end of the piston buckle 3 is inserted into the outer tube 2, and a slot is opened on the inner wall of the outer tube 2 to facilitate the locking of the locking block 40 and realize the positioning when the pull rod is extended. When it is necessary to shorten the pull rod, the transmission rod 6 is applied by operating the handle, and the transmission rod 6 applies force to the driving component to press it down. The spring 41 contracts, and the inclined surface on the driving block 5 abuts against the inclined surface on the locking block 40 and slides, gradually retracting the locking block 40 into the telescopic groove 32, breaking away from the restriction of the slot, and completing the function of the inner tube 1 retracting into the outer tube 2.

[0017] Example 1: The hanging block 10 on the inner tube 1 is T-shaped, with hook grooves 13 formed on both sides. The hooks 31 on the upper part of the housing 30 are respectively fastened in the hook grooves 13 for fixation, so as to realize the quick assembly of the piston buckle 3 and the inner tube 1.

[0018] Example 2: The hook 31 above the housing 30 is T-shaped, with hook grooves 34 on both sides. The hanging blocks 10 on the inner tube 1 are respectively fastened in the hook grooves 34 to fix them, so as to realize the quick assembly of the piston buckle 3 and the inner tube 1.

[0019] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A tie rod characterized by: The device includes an inner tube (1) and an outer tube (2), with the outer tube (2) fitted over the inner tube (1) and the two slidingly engaged. The end of the inner tube (1) is provided with a piston buckle (3), which includes a housing (30). A hook (31) is provided above the housing (30), and a hanging block (10) adapted to the hook (31) is provided at the end of the inner tube (1). The two side walls of the hook (31) and the hanging block (10) abut against the inner wall of the outer tube (2). A telescopic groove (32) is provided below the housing (30), and a telescopic locking element (4) is provided in the telescopic groove (32). The outer wall of the housing (30) and the opening of the telescopic groove (32) are both connected to the outer tube (2). The inner walls are fitted together, and the end of the locking member (4) protrudes from the side of the housing (30). The side wall of the outer tube (2) is provided with a slot (20) for the end of the locking member (4) to be engaged. The housing (30) is provided with a drive groove (33) above the telescopic groove (32). A communication port is provided between the drive groove (33) and the telescopic groove (32). The drive groove (33) is provided with a drive member for driving the end of the locking member (4) to retract into the telescopic groove (32). The drive member includes a drive block (5). A spring (50) is sleeved on the drive block (5). After the tail end of the drive block (5) passes through the communication port, it extends into the telescopic groove (32) and abuts against the locking member (4).

2. A drawbar according to claim 1, wherein: The through groove in the inner tube (1) includes groove one (11) and groove two (12), wherein groove two (12) is located at the center of groove one (11), and the cross-sectional width of groove two (12) is greater than the cross-sectional width of groove one (11). A transmission rod (6) is inserted in groove two (12), and the transmission rod (6) is slidably fitted in groove two (12), with its end extending to the drive block (5) for fixed fit.

3. A drawbar according to claim 2, wherein: The locking component (4) includes a locking block (40) and a second spring (41) located at the tail end of the locking block (40). The second spring (41) drives the end of the locking block (40) to extend outside the telescopic groove (32) and is engaged in the slot (20) of the outer tube (2).

4. A pull rod according to claim 1, characterized in that: The hanging block (10) on the inner tube (1) is T-shaped, forming a hook groove (13) on both sides. The hook (31) on the upper part of the shell (30) is fastened in the hook groove (13) for fixation.

5. A pull rod according to claim 1, characterized in that: The hook (31) above the housing (30) is T-shaped, forming hook grooves (34) on both sides. The hanging blocks (10) on the inner tube (1) are respectively fastened in the hook grooves (34) for fixation.

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