Stepless pull rod for luggage

Abstract

The utility model discloses an electrodeless pull rod for a luggage, relates to luggage accessories, aims to solve the problem that the telescopic length of a pull rod cannot be adjusted, and adopts the technical scheme that the electrodeless pull rod for the luggage comprises two rod piece groups which are arranged in parallel, and each rod piece group comprises a first rod piece, a second rod piece and a third rod piece, a grab handle is arranged between the top ends of the two third rod pieces and provided with a button, a stepless locking assembly is arranged between the second rod piece and the third rod pieces and comprises a rack, a swing arm and a driving piece, the swing arm is provided with embedding teeth embedded with any tooth opening of the rack, and a cylinder is arranged between the driving piece and the button for transmission connection. According to the stepless pull rod for the luggage, on the premise that a traditional operation mode is not changed, stepless adjustment of the telescopic length between the second rod piece and the third rod piece is achieved, and more length choices are provided for a user.

Description

Technical Field

[0001] The utility model relates to luggage accessories, and more specifically, to a stepless pull rod for luggage. Background Art

[0002] A trolley case is a box that is carried with you when you go out and is used to store items. It is a type of suitcase and is characterized by having a trolley that can be retracted by the user.

[0003] The pull rods in the prior art are generally polar, that is, they only have 1-3 locking gears and do not have the ability to control the telescopic length. In response to the above problems, a Chinese patent announcement with announcement number CN219894930U discloses a high-strength stepless locking round tube pull rod for luggage, and its technical points are: it includes a pull rod mechanism, there are two pull rod mechanisms, the upper ends of the pull rod mechanisms are fixedly connected to the two sides of the lower end of the handle, and the handle is provided with an adjustment mechanism inside the handle, the pull rod mechanism includes a lower slide cylinder, the sides of the lower slide cylinder that are close to each other are fixedly connected with ratchet strips, and the sides of the lower slide cylinder that are far away from each other are fixedly connected with a limited sliding groove, the inner upper part of the lower slide cylinder is slidably connected with an upper slide rod, the front side of the lower end of the upper slide rod is rotatably connected with a ratchet wheel through a rotating rod, and the lower end of the ratchet wheel is meshed with a pawl.

[0004] The above technical solution realizes the stepless telescopic locking of the pull rod through the ratchet pawl, which solves the problem that the telescopic length of the pull rod cannot be adjusted in the prior art. Now a new solution is proposed to solve this problem. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a stepless pull rod for luggage, which can achieve stepless adjustment of the telescopic length between the second rod and the third rod without changing the traditional operating mode, thereby providing users with more length options.

[0006] The above-mentioned technical purpose of the utility model is achieved through the following technical scheme: a stepless pull rod for luggage, comprising two groups of rod members arranged in parallel, each group of the rod members includes a first rod member fixed to the luggage, a second rod member slidably inserted in the first rod member, and a third rod member slidably inserted in the second rod member, a handle is arranged between the top ends of the two third rod members, the handle is provided with a button, a stepless locking assembly is arranged between the second rod member and the third rod member, the stepless locking assembly includes a rack arranged inside the second rod member, a swing arm swingably connected to the bottom end of the third rod member, and a driving member for controlling the swing of the swing arm, the swing arm is provided with engaging teeth engaged with any tooth opening of the rack, and a cylindrical transmission connection is arranged between the driving member and the button.

[0007] By adopting the above-mentioned technical scheme, the present application sets a stepless locking component between the second rod and the third rod, so that the extended length between the second rod and the third rod is adjustable, thereby realizing stepless extension and retraction of the two rod groups to meet the user's various length requirements; the specific operating principle is as follows: the user applies pressure to the button of the handle, and after the pressure is transmitted through the force of the column, a downward pressure is generated on the driving member and it is forced to move downward. During the downward movement, the driving member generates an outward swinging thrust on the swing arm, thereby forcing the engaging teeth of the swing arm to disengage from the tooth mouth of the rack. In this state, the third rod can be normally extended and retracted. When the length adjustment is completed, the driving member and the swing arm are reset, so that the engaging teeth of the swing arm are engaged with the rack, thereby realizing the relative activity locking between the second rod and the third rod; in summary, the present application realizes stepless adjustment of the telescopic length between the second rod and the third rod without changing the traditional operating mode, thereby providing users with more length options.

[0008] The utility model is further configured as follows: an assembly shell is arranged at the bottom end of the third rod, the swing arm pin is rotatably connected to the assembly shell, and the driving member is slidably connected to the assembly shell.

[0009] The utility model is further configured as follows: the top end of the driving member extends out of the assembly shell and is provided with a pressure-bearing end head, and a first compression spring is provided between the bottom end of the driving member and the assembly shell.

[0010] The utility model is further configured as follows: the driving member body is in an inverted "J" shape, having an outward-pushing hook and an inward-pushing table, the swing arm having an outward-swinging force-bearing surface cooperating with the outward-pushing hook, and the swing arm having an inward-swinging force-bearing surface cooperating with the inward-pushing table.

[0011] The utility model is further configured as follows: an anti-dropout nest is provided at the top end of the second rod, and the assembly shell is provided with an anti-dropout convex edge for the anti-dropout nest to abut against.

[0012] The utility model is further configured as follows: a latch box is provided at the bottom end of the second rod, the latch box is horizontally slidably connected with a locking latch, the latch box is vertically slidably connected with a pressing piece, the locking latch is provided with a force-bearing inclined surface, the pressing piece is provided with a force-applying inclined surface, and the first rod is provided with a locking socket for the locking latch to be inserted.

[0013] The utility model is further configured as follows: the top end of the pressing member extends out of the latch box and is provided with a pressing end head, the pressing end head is within the vertical projection range of the lower end surface of the assembly shell, and a second compression spring is provided between the pressing end head and the latch box.

[0014] The utility model is further configured as follows: a third compression spring is arranged between the locking latch and the latch box.

[0015] In summary, the utility model has the following beneficial effects: without changing the traditional operating mode, the telescopic length between the second rod and the third rod can be infinitely adjusted, providing users with more length options; by integrating the swing arm and the driving member in the assembly shell, the assembly shell can be installed on the third rod to complete the assembly, effectively improving the convenience of assembly in assembly line production; by optimizing the structure of the driving member, it has the technical effect of locking and unlocking the swing arm at the same time; through the cooperation between the anti-detachment protrusion and the anti-detachment nest, the maximum extension amount of the second rod and the third rod is limited, effectively preventing the two from detaching; a fixed-length locking pin structure is set between the second rod and the first rod for locking. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 2 A partial cross-sectional view of the present application;

[0018] Figure 3 The structural diagram behind the first, second and third rods is hidden for this application, and the diagram is truncated for convenience of presentation;

[0019] Figure 4 for Figure 2 The enlarged view of part A mainly shows the structure of the stepless locking assembly;

[0020] Figure 5 for Figure 2 The enlarged view of part B mainly shows the latch structure.

[0021] Description of the drawings: 1. first rod; 2. second rod; 3. third rod; 4. handle; 5. button; 6. rack; 7. swing arm; 8. drive member; 9. engaging teeth; 10. column; 11. assembly shell; 12. pressure-bearing end; 13. first compression spring; 14. outward push hook; 15. inward push table; 16. outward swing force-bearing surface; 17. inward swing force-bearing surface; 18. anti-slip nesting; 19. anti-slip convex edge; 20. latch box; 21. locking latch; 22. pressing member; 23-1. force-bearing inclined surface; 23. force-applying inclined surface; 24. locking socket; 25. pressing end; 26. second compression spring; 27. third compression spring. DETAILED DESCRIPTION

[0022] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0023] A stepless pull rod for luggage, such as Figure 1 , Figure 2 , Figure 3As shown, it includes two groups of rod members arranged in parallel, each group of the rod members includes a first rod 1 fixed to the bag, a second rod 2 slidably inserted in the first rod 1, and a third rod 3 slidably inserted in the second rod 2, a handle 4 is fixedly installed between the top ends of the two third rods 3, and a button 5 is installed on the handle 4; a stepless locking assembly is arranged between the second rod 2 and the third rod 3, and the stepless locking assembly includes a rack 6 arranged inside the second rod 2, a swing arm 7 swingably connected to the bottom end of the third rod 3, and a driving member 8 for controlling the swing of the swing arm 7, the swing arm 7 is integrally formed with an engaging tooth 9 that engages with any tooth opening of the rack 6, and a column 10 is arranged between the driving member 8 and the button 5 for transmission connection.

[0024] The present application sets a stepless locking assembly between the second rod 2 and the third rod 3, so that the extended length between the second rod 2 and the third rod 3 is adjustable, thereby realizing stepless extension and retraction of the two rod groups to meet the user's various length requirements; the specific operating principle is as follows: the user applies pressure to the button 5 of the handle 4, and after the pressure is transmitted by the force of the column 10, a downward pressure is generated on the driving member 8 and it is forced to move downward. During the downward movement of the driving member 8, an outward swinging thrust is generated on the swing arm 7, thereby forcing the engaging teeth 9 of the swing arm 7 to disengage from the tooth mouth of the rack 6. In this state, the third rod 3 can be normally extended and retracted. When the length adjustment is completed, the driving member 8 and the swing arm 7 are reset, so that the engaging teeth 9 of the swing arm 7 are stuck in the rack 6, thereby realizing locking between the second rod 2 and the third rod 3 to meet normal push-pull requirements; in summary, the present application realizes stepless adjustment of the extension length between the second rod 2 and the third rod 3 without changing the traditional operating mode, providing users with more length options.

[0025] To improve assembly convenience, Figure 3 , Figure 4 As shown, the bottom end of the third rod 3 is clamped and fixed with an assembly shell 11, the swing arm 7 is rotatably connected to the assembly shell 11 by a pin, and the driving member 8 is slidably connected to the assembly shell 11; by integrating the swing arm 7 and the driving member 8 into the assembly shell 11, the assembly shell 11 can be installed on the third rod 3 to complete the assembly, thereby effectively improving the assembly convenience of assembly line production.

[0026] The driving member 8 realizes force transmission with the button 5 in the following manner: Figure 3 , Figure 4 As shown, the top of the driving member 8 extends out of the assembly shell 11 and is provided with a pressure-receiving end 12 . When the user presses the button 5 , the column 10 moves downward and applies force to the pressure-receiving end 12 , thereby achieving force transmission between the driving member 8 and the button 5 .

[0027] The drive member 8 is reset in the following manner: Figure 3 , Figure 4As shown, a first compression spring 13 is provided between the bottom end of the driving member 8 and the assembly shell 11. When the driving member 8 is pressed downward, the first compression spring 13 undergoes compression elastic deformation. When the driving member 8 loses the downward pressure, the first compression spring 13 releases elastic potential energy, thereby pushing the driving member 8 to reset.

[0028] The driving member 8 controls the swing of the swing arm 7 in the following manner: Figure 3 , Figure 4 As shown, the main body of the driving member 8 is in an inverted "J" shape, which has an outward push hook 14 and an inward push table 15, the swing arm 7 has an outward swing force-bearing surface 16 that cooperates with the outward push hook 14, and the swing arm 7 has an inner swing force-bearing surface 17 that cooperates with the inner push table 15; when the driving member 8 is moved upward by the first compression spring 13, the outward push hook 14 cooperates with the outward swing force-bearing surface 16 to push the swing arm 7 to swing toward the rack 6 until the engaging tooth 9 is hooked on the tooth mouth of the rack 6, and this state is the locked state; when the user applies downward pressure to the driving member 8 through the button 5 and the column 10 and forces the driving member 8 to move downward, the inner push table 15 cooperates with the inner swing force-bearing surface 17 to push the swing arm 7 to swing away from the rack 6, and this state is the unlocked state; in summary, by optimizing the structure of the driving member 8, it has the technical effects of locking and unlocking the swing arm 7 at the same time.

[0029] It should be noted that if Figure 4 As shown, an anti-slip nest 18 is inserted and fixed at the top end of the second rod 2, and the assembly shell 11 is integrally formed with an anti-slip ridge 19 for the anti-slip nest 18 to abut against, so that the maximum extension amount of the second rod 2 and the third rod 3 is limited by the cooperation between the anti-slip ridge 19 and the anti-slip nest 18, effectively preventing the two from detaching.

[0030] In this embodiment, a fixed-length locking pin structure is provided between the second rod 2 and the first rod 1 for locking. The specific structure is as follows: Figure 3 , Figure 5 As shown, a latch box 20 is provided at the bottom end of the second rod 2, the latch box 20 is horizontally slidably connected to a locking latch 21, the latch box 20 is vertically slidably connected to a pressing member 22, the locking latch 21 is integrally formed with a force-bearing inclined surface 23-1, the pressing member 22 is integrally formed with a force-applying inclined surface 23, and the first rod 1 is provided with a locking socket 24 for the locking latch 21 to be inserted; in the unfolded state, the locking latch 21 is inserted into the locking socket 24, thereby limiting the second rod 2 and the first The sliding ability between the first and second rods 1 can meet the user's push-pull needs; when the third rod 3 is fully retracted into the second rod 2, the lower end surface of the assembly shell 11 presses on the pressing piece 22 to force it to move downward, thereby forcing the locking pin 21 to be pulled out of the locking socket 24 through the cooperation between the force-applying inclined surface 23 and the force-bearing inclined surface 23-1. In this state, the second rod 2 can be freely pushed to retract into the first rod 1, that is, the present application is in a contracted state, with a technical effect of a relatively simple structure.

[0031] It should also be noted that a stepless locking assembly may also be provided between the second rod 2 and the first rod 1 to achieve length control.

[0032] The pressing member 22 is pressed downward and moved upward to reset in the following manner: Figure 3 , Figure 5 As shown, the top end of the pressing member 22 extends out of the latch box 20 and is integrally formed with a pressing end head 25, which is within the vertical projection range of the lower end face of the assembly shell 11. The pressing member 22 bears the downward pressure from the lower end face of the assembly shell 11 through the pressing end head 25 to achieve the technical requirement of the pressing member 22 moving downward in conjunction; a second compression spring 26 is provided between the pressing end head 25 and the latch box 20, so that the second compression spring 26 pushes the pressing member 22 to rise and reset to meet the technical requirement.

[0033] It should be noted that if Figure 3 , Figure 5 As shown, a third compression spring 27 is provided between the locking pin 21 and the pin box 20 , so that the third compression spring 27 releases elastic potential energy to push the locking pin 21 to be inserted into the locking insertion hole 24 .

[0034] The specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A stepless pull rod for luggage, comprising two groups of rod members arranged in parallel, each group of the rod members comprising a first rod member (1) fixed to the luggage, a second rod member (2) slidably plugged into the first rod member (1), and a third rod member (3) slidably plugged into the second rod member (2), a handle (4) is arranged between the top ends of the two third rod members (3), and the handle (4) is provided with a button (5), characterized in that: A stepless locking assembly is arranged between the second rod (2) and the third rod (3), the stepless locking assembly comprising a rack (6) arranged inside the second rod (2), a swing arm (7) swingably connected to the bottom end of the third rod (3), and a driving member (8) for controlling the swing of the swing arm (7), the swing arm (7) being provided with engaging teeth (9) engaged with any tooth opening of the rack (6), and a column (10) being arranged between the driving member (8) and the button (5) for transmission connection.

2. The stepless pull rod for luggage according to claim 1, characterized in that: The bottom end of the third rod (3) is provided with an assembly shell (11), the swing arm (7) is rotatably connected to the assembly shell (11) by a pin shaft, and the driving member (8) is slidably connected to the assembly shell (11).

3. The stepless pull rod for luggage according to claim 2, characterized in that: The top end of the driving member (8) extends out of the assembly shell (11) and is provided with a pressure-bearing end (12); a first compression spring (13) is provided between the bottom end of the driving member (8) and the assembly shell (11).

4. The stepless pull rod for luggage according to claim 3, characterized in that: The main body of the driving member (8) is in an inverted "J" shape, and has an outward-pushing hook (14) and an inward-pushing table (15); the swing arm (7) has an outward-swinging force-bearing surface (16) that cooperates with the outward-pushing hook (14); and the swing arm (7) has an inward-swinging force-bearing surface (17) that cooperates with the inward-pushing table (15).

5. The stepless pull rod for luggage according to claim 2, characterized in that: The top end of the second rod (2) is provided with an anti-dropout nest (18), and the assembly shell (11) is provided with an anti-dropout convex edge (19) for the anti-dropout nest (18) to abut against.

6. The stepless pull rod for luggage according to claim 2, characterized in that: A latch box (20) is provided at the bottom end of the second rod (2), the latch box (20) is horizontally slidably connected to a locking latch (21), the latch box (20) is vertically slidably connected to a pressing piece (22), the locking latch (21) is provided with a force-bearing inclined surface (23-1), the pressing piece (22) is provided with a force-applying inclined surface (23), and the first rod (1) is provided with a locking socket (24) for the locking latch (21) to be inserted into.

7. The stepless pull rod for luggage according to claim 6, characterized in that: The top end of the pressing member (22) extends out of the latch box (20) and is provided with a pressing end head (25). The pressing end head (25) is within the vertical projection range of the lower end surface of the assembly shell (11). A second compression spring (26) is provided between the pressing end head (25) and the latch box (20).

8. The stepless pull rod for luggage according to claim 6, characterized in that: A third compression spring (27) is arranged between the locking latch (21) and the latch box (20).

Images