Self-locking pull rod and method of using the same

Abstract

A self-locking pull rod and its use method, including an outer tube, a sheath and an outer tube structure respectively built into the upper and lower ends of the outer tube, and an inner tube built into the outer tube, the upper end, any position in the middle, and the lower end of the outer tube are respectively provided with a structure lock hole, a structure stop hole, and a structure dormant adapter hole, the outer tube structure includes an outer tube structure body and two unlocking blocks fixed on the outer tube structure body, the lower end of the inner tube is provided with a structure, the structure is fixed in the structure installation hole of the inner tube, the inner tube is fixed to the upper end, middle or lower end of the outer tube through the structure, and the inner tube is fixed to the upper end, middle or lower end of the outer tube, thereby completing the inner tube's stop and retract telescopic fixation; the structure includes a structure body, a stop buckle, a fixing part, and a locking piece for locking the stop buckle. The present invention only needs one structural part to realize the function of pulling and retracting the rod, and no additional auxiliary parts such as buttons, springs, pressure rods, and pressure blocks are required when lifting and retracting the rod, which reduces the construction procedures and improves the manufacturing efficiency.

Description

Technical Field

[0001] The invention relates to the field of pull rod manufacturing, and in particular to a self-locking pull rod and a use method thereof. Background Art

[0002] There are 2 existing technologies:

[0003] 1. Before pulling out or retracting the rod, the buckles are in the holes at various positions of the outer tube (the pull rod is locked and cannot be pulled up or retracted). To pull out or retract the rod, press the handle button, and the handle button will press down the pressure rod and the pressure block, and the pressure block will then press down the top block of the structural member, and the top block will then use its 45-degree angle to compress the buckle from the lock hole of the outer tube into the inner tube, thereby unlocking the buckle and allowing the pulling out or retracting of the rod to be smoothly achieved. This method requires many parts, is difficult to assemble, and the pull rod is heavy, which is far from meeting production needs.

[0004] 2. The inner tube is equipped with a steel ball and a spring. The spring pushes the steel ball toward the inner wall of the outer tube. When the steel ball is pulled to the holes at various positions of the outer tube, the steel ball is stuck in the holes of the outer tube to fix the inner tube at different positions of the outer tube. This structure will cause the inner tube to fall down when the pull rod is pressed down with a little force, which is very inconvenient to use, so the application volume is very low. Summary of the invention

[0005] The purpose of the present invention is to provide a self-locking pull rod and a method for using the same, mainly to solve the existing technical problems of high pull rod cost due to a large number of materials, complex product structure and difficult manufacturing process; and to solve the design aesthetic problems caused by these problems.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] A self-locking pull rod, characterized in that it comprises an outer tube, a sheath and an outer tube structure respectively built into the upper end and the lower end of the outer tube, and an inner tube built into the outer tube, wherein the upper end, the middle part and the lower end of the outer tube are respectively provided with a structure lock hole, a structure stop hole and a structure dormant adaption hole, the outer tube structure comprises an outer tube structure body and two unlocking blocks fixed on the outer tube structure body, the lower end of the inner tube is provided with a structure, the structure is clamped in the structure installation hole of the inner tube, the inner tube is fixed to the upper end, the middle part or the lower end of the outer tube through the structure, thereby completing the inner tube's stop and retract telescopic fixation;

[0008] The structural member includes a structural member body, a stop buckle, a fixing member and a locking plate for locking the stop buckle, the stop buckle is arranged on a movable plate, and the end face of the stop buckle away from the structural member body is an inclined surface inclined upward toward the structural member body; the end of the movable plate is solidly molded with the structural member body as a whole; the fixing member includes two clamping plates arranged below the structural member body, the inner wall of the clamping plate is provided with a convex point for fixing to the inner tube, the clamping plate of the structural member is turned over to the outer wall of the inner tube, the convex point is clamped in the structural member mounting hole provided on the inner tube and the mounting hole on the structural member body, thereby fixing the structural member to the inner tube, and the inner tube is fixed to the dormant adaptation hole of the structural member, the pause hole or the structural member locking hole through the stop buckle, and then fixed to the lower end, middle part or upper end of the outer tube.

[0009] Further preferably, a spring for the structural component body is provided between the stop buckle and the structural component body.

[0010] Furthermore, there is one inner tube, and a handle and a structural member are respectively provided at the upper end and the lower end of the inner tube.

[0011] Furthermore, there are at least two inner tubes, wherein the upper and lower ends of the inner tube located in the middle are respectively provided with a sheath and a structural member, and the upper and lower ends of the inner tube located at the top are respectively provided with a handle and a structural member, and an unlocking block is provided at the upper end of the structural member.

[0012] Furthermore, the pull rod is a pair of pull rods arranged in parallel, the outer wall of the outer tube of the pull rod is fixed to the object carrier, and the upper end of the inner tube of the pull rod is fixed by a connecting handle.

[0013] Furthermore, an outer tube fixing buckle is provided on the outer wall of the outer tube structural component body, and the outer tube structural component is clamped in the outer tube structural component mounting hole provided at the lower end of the outer tube through the outer tube fixing buckle, and then fixed inside the lower end of the outer tube.

[0014] Furthermore, the structural member mounting hole comprises a stop buckle mounting hole.

[0015] In addition, the stop buckle is arranged on the outer wall of the main body of the structural component, and a stop buckle through-hole corresponding to the stop buckle is arranged on the outer wall of the main body of the structural component, and the main body of the structural component is located on the opposite side of the stop buckle through-hole.

[0016] More preferably, the structural part dormant adaptation hole includes an outer tube stop buckle dormant hole, the structural part stopping hole includes an outer tube stop buckle stopping hole, the outer tube stop buckle stopping holes are on more than one side of the outer tube, and there are more than one on one side; the structural part locking hole includes an outer tube stop buckle locking hole.

[0017] A method for using a self-locking pull rod, characterized in that it comprises the following steps:

[0018] Step 1, pull the rod: pull up the inner tube. The stop buckle is pressed by the inner wall of the outer tube because the inclined surface is facing upward, so that the stop buckle is retracted from the dormant adapter hole of the structural part. The inner tube stops at different stop buckle stop holes on the outer tube according to the height requirements of the user. The inner tube can only be pulled up, and cannot be retracted downward;

[0019] Step 2, pull the rod: continue to pull the inner tube upwards. When the inner tube is pulled to the lock hole of the outer tube structure, the stop buckle automatically pops out of the outer tube through the lock hole of the outer tube stop buckle. The inner tube can only be pulled upwards and cannot be pulled downwards. Continue to pull the inner tube upwards so that the stop buckle is retracted from the lock hole of the outer tube stop buckle until the upper edge of the fixing part of the inner tube structure touches the lower edge of the outer tube sheath, and the inner tube cannot continue to move upwards.

[0020] Step 3, retracting the rod: When the stop buckle is separated from the lock hole of the outer tube and moves toward the inner wall of the sheath, the stop buckle moves further toward the inside of the main body of the structural component due to the pressure of the inner wall of the sheath until the stop buckle is locked inside the main body of the structural component by the locking plate. At this time, the inner tube can be retracted by pressing down on the inner tube;

[0021] Step 4, unlocking: when the inner tube is retracted, the stop buckle is squeezed by the unlocking block 2 of the outer tube structure, and then the outer tube stop buckle dormant hole is popped out. At this time, the inner tube can be pulled up next time. At this point, a self-locking pull rod is used.

[0022] The implementation of the present invention can achieve the following beneficial effects:

[0023] The present invention only needs one main part of the structure to realize the functions of pulling the rod and closing the rod. No additional auxiliary parts such as buttons, springs, pressure rods, pressure blocks, etc. are needed when lifting and closing the rod. Except for the pipe, the entire pull rod can be made of only one material, plastic.

[0024] The present invention saves materials. Taking a three-section tube (outer tube + two inner tubes) as an example, the number of parts is reduced by 61%, which saves assembly time. The assembly can be done without equipment and tools, thus reducing the management and storage costs of the assembly line.

[0025] The invention has a light weight. Taking the three-section pipe as an example, the weight is reduced by 20%. There is no need to press buttons, it is smoother and quieter, has a higher degree of design freedom, and is more beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure in which the inner tube is built into the outer tube of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of the inner tube pulling out the outer tube of the present invention;

[0028] Figure 3 It is a structural schematic diagram of an outer tube provided with an outer tube stop buckle retention hole according to the present invention;

[0029] Figure 4 It is a structural schematic diagram of the outer tube structural member involved in the present invention;

[0030] Figure 5 It is a structural schematic diagram of the sheath involved in the present invention;

[0031] Figure 6 It is a structural schematic diagram of the connection between the inner tube and the structural member according to the present invention;

[0032] Figure 7 It is a structural schematic diagram of the inner tube involved in the present invention;

[0033] Figure 8 This is a schematic structural diagram of Embodiment 1 of the structural member according to the present invention;

[0034] Fig. 9 It is a cross-sectional view of the structural parts involved;

[0035] Fig.10 This is a schematic structural diagram of a second embodiment of a structural member according to the present invention;

[0036] Fig.11 for Fig.10 Schematic diagram of the enlarged structure of section BB.

[0037] Fig.12 It is a structural schematic diagram of the first embodiment of the stop buckle according to the present invention;

[0038] Fig.13 It is a structural schematic diagram of the second embodiment of the stop buckle according to the present invention;

[0039] Fig.14 It is a structural schematic diagram of the third embodiment of the stop buckle according to the present invention;

[0040] Fig.15 It is a structural schematic diagram of a fourth embodiment of the stop buckle according to the present invention;

[0041] Fig.16 It is a schematic diagram of the positional relationship between the spring and the main body of the structural member involved in the present invention;

[0042] Fig.17 The present invention is a schematic structural diagram of the positional relationship between the air avoidance hole and the unlocking block.

[0043] Description of the accompanying drawings for the specific implementation:

[0044] 1-inner tube; 11-structural component mounting hole; 12-stop buckle mounting hole; 2-structural component; 21-structural component body; 22-stop buckle; 23-fixing component; 25-movable plate; 26-bump; 27-mounting hole; 28-locking plate; 29-unlocking block one; 3-outer tube; 31-skin mounting hole; 32-outer tube structural component mounting hole; 33-outer tube stop buckle locking hole; 37-outer tube stop buckle dormant hole; 4-skin; 41-skin bump; 5-outer tube structural component; 51-outer tube structural component body; 52-unlocking block two; 53-outer tube fixing buckle; 6-outer tube stop buckle stop hole; 100-spring; 101-avoidance hole. DETAILED DESCRIPTION

[0045] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] A self-locking pull rod comprises an outer tube 3, a sheath 4 and an outer tube structure 5 respectively built into the upper and lower ends of the outer tube 3, and an inner tube 1 built into the outer tube 3, such as Figure 3 As shown, the upper end, middle part and lower end of the outer tube 3 are respectively provided with a structural member locking hole 33, a structural member stop hole 6 and a structural member dormant adapting hole 37, as shown in FIG. Figure 4 As shown, the outer tube structure 5 includes an outer tube structure body 51 and an unlocking block 52 fixed on the outer tube structure body 51. Figure 6 As shown, a structural member 2 is provided at the lower end of the inner tube 1, and the structural member 2 is fixed in the structural member installation hole of the inner tube 1. The inner tube 1 is fixed to the upper end, middle part or lower end of the outer tube 3 through the structural member 2, thereby completing the extension and retraction of the inner tube 1.

[0047] like Figure 8As shown, the structural member 2 includes a structural member body 21, a stop buckle 22, a fixing member 23 and a locking piece 28 for locking the stop buckle 22. The stop buckle 22 is arranged on the movable plate 25, and the end surface of the stop buckle 22 away from the structural member body 21 is an inclined surface inclined upward to the structural member body 21; the stop buckle 22 can be more than one side of the structural member, and can be at the same or different heights on each side. As long as it can prevent retraction, the stop buckle can be of any shape. The end of the movable plate 25 is solidly plasticized with the structural member body 21. The fixing member 23 includes two fixing plates arranged below the structural member body 21. The fixing member 23 includes two fixing plates arranged below the structural member body 21. A protrusion 26 for fixing to the inner tube 1 is provided on the inner wall of the fixing plate. The protrusion 26 and the fixing plate are not drawn in the figure. The fixing plate of the structural member 2 is turned over to the outer wall of the inner tube 1, and the protrusion 26 is fixed in the structural member mounting hole 11 provided on the inner tube 1 and the mounting hole 27 on the structural member body, thereby fixing the structural member 2 to the inner tube 1. The inner tube 1 is fixed to the dormant adaptation hole of the structural member through the stop buckle 22, and the outer tube stop buckle retention hole 6 or the structural member locking hole is further fixed to the lower end, middle or upper end of the outer tube 3. The structural member 2 can be integrally injection molded, and the shape of the structural member 2 is adapted to the shape of the inner tube.

[0048] As a preferred embodiment of the present invention, there is one inner tube 1, and a handle and a structural member 2 are respectively provided at the upper end and the lower end of the inner tube 1.

[0049] As a preferred embodiment of the present invention, there are at least two inner tubes 1, wherein the upper and lower ends of the inner tube 1 located in the middle portion are respectively provided with a sheath 4 and a structural member 2, an unlocking block 29 is provided at the upper end of the structural member 2, and the working mode of the unlocking block 29 is the same as that of the unlocking block 2 52, and a handle and a structural member 2 are respectively provided at the upper and lower ends of the inner tube 1 located at the top.

[0050] like Figure 5 As shown, the outer wall of the sheath 4 is provided with a sheath protrusion 41, and the sheath 4 is fixed in the sheath mounting hole 31 provided at the upper end of the outer tube 3 through the sheath protrusion 41, and then fixed inside the upper end of the outer tube 3. The pull rod is a pair of parallel pull rods, the outer wall of the outer tube 3 of the pull rod is fixed to the object, and the upper end of the inner tube 1 of the pull rod is fixed by a connecting handle.

[0051] like Figure 4 As shown, an outer tube fixing buckle 53 is provided on the outer wall of the outer tube structural member body 51, and the outer tube structural member 5 is fixed to the outer tube structural member mounting hole 32 provided at the lower end of the outer tube 3 through the outer tube fixing buckle 53 and then fixed inside the lower end of the outer tube 3. Figure 7 As shown, the structural member mounting hole includes a buckle mounting hole 12 .

[0052] As a preferred embodiment of the present invention, Figure 3As shown, outer tube stop buckle retention holes 6 for the stop buckles 22 to stay are evenly spaced on the outer tube 3, and there is at least one outer tube stop buckle retention hole 6 on one side. The user can adjust the outer tube stop buckle retention hole 6 to different heights according to needs.

[0053] As a preferred embodiment of the present invention, Fig.16 As shown, a spring 100 for the structural component body 21 is provided between the stop buckle 22 and the structural component body 21, and correspondingly, a corresponding air-avoiding hole 101 is provided on the unlocking block (the unlocking block includes the unlocking block 1 29 and the unlocking block 2 52).

[0054] As a preferred embodiment of the present invention, Fig.10 and Fig.11 This is another embodiment of the structural member 2 of the present invention. As can be seen from the figure, the stop buckle 22 is arranged on the outer wall of the structural member body 21, and the outer wall of the structural member body 21 is provided with a stop buckle through hole 7 corresponding to the stop buckle 22.

[0055] The positional relationship between the stop buckle 22, the movable plate 25 and the locking plate 28 is also set as follows: Figures 12 to 15 state.

[0056] A method for using a self-locking pull rod, characterized in that it comprises the following steps:

[0057] Step 1: Pull the rod: When the position relationship between the inner tube 1 and the outer tube 3 is as follows Figure 1 As shown, the inner tube 1 is pulled upward, and the stop buckle 22 faces upward because of the inclined surface. The stop buckle 22 is pressed by the inner wall of the outer tube 3 so that the stop buckle 22 is retracted from the dormant adapter hole of the structural member. The inner tube 1 stops at different outer tube stop buckle stop holes 6 on the outer tube 3 through the stop buckle 22 according to the height requirements of the user;

[0058] Step 2, pull rod: continue to pull the inner tube 1 upwards, when the inner tube 1 is pulled to the locking hole of the structural part of the outer tube 3, the stop buckle 22 automatically pops out of the outer tube 3 through the locking hole 33 of the outer tube stop buckle, and the inner tube 1 can only be pulled upwards, and cannot be pulled downwards; continue to pull the inner tube 1 upwards, so that the stop buckle 22 is retracted from the locking hole 33 of the outer tube stop buckle, until the upper edge of the fixing part 23 of the structural part 2 of the inner tube 1 touches the lower edge of the sheath 4 of the outer tube 3, and the inner tube 1 cannot continue to move upwards;

[0059] Step 3, closing the rod: Since the stop buckle 22 is elastic, if it is not locked inside the inner tube 1, it will pop out when the stop buckle 22 is pushed to its locking hole when closing the rod, and the inner tube 1 cannot continue to be closed. Therefore, the stop buckle must be locked at the inner tube to close the rod. In the process of the stop buckle 22 leaving the outer tube stop buckle locking hole 33 and moving toward the inner wall of the sheath 4, the stop buckle 22 moves further into the structure body 21 due to the pressure of the inner wall of the sheath 4, until the stop buckle 22 is locked inside the structure body 21 by the locking plate 28. The positional relationship between the locking plate 28 and the stop buckle 22 is as shown in FIG. Fig. 9 As shown, at this time, the inner tube 1 can be retracted by pressing the inner tube 1 downward;

[0060] Step 4, unlocking: If the stop buckle is not unlocked, then when we pull the rod again, the downward force when pushing the box forward will easily press the inner tube 1 down and fail to achieve the effect of pushing the box forward. Therefore, there must be an unlocking step. When the inner tube 1 is retracted, the stop buckle 22 is squeezed by the unlocking block 2 52 of the outer tube structure 5, and then pops out of the outer tube stop buckle dormant hole 37. At this time, the inner tube 1 can be pulled up next time. At this point, a self-locking pull rod is used.

[0061] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A self-locking pull rod, characterized in that: The invention comprises an outer tube (3), a sheath (4) and an outer tube structural member (5) respectively built into the upper end and the lower end of the outer tube (3), and an inner tube (1) built into the outer tube (3), wherein the upper end, the middle part and the lower end of the outer tube (3) are respectively provided with a structural member locking hole, a structural member stopping hole and a structural member dormant adapting hole, the outer tube structural member (5) comprises an outer tube structural member body (51) and a second unlocking block (52) fixed on the outer tube structural member body (51), the lower end of the inner tube (1) is provided with a structural member (2), the structural member (2) is clamped in the structural member mounting hole of the inner tube (1), the inner tube (1) is fixed to the upper end, the middle part or the lower end of the outer tube (3) through the structural member (2), thereby completing the stopping and retracting telescopic fixation of the inner tube (1); The structural member (2) comprises a structural member body (21), a stop buckle (22) and a locking plate (28) for locking the stop buckle (22); the stop buckle (22) is arranged on a movable plate (25), and the end surface of the stop buckle (22) away from the structural member body (21) is an inclined surface inclined upward toward the structural member body (21); the end of the movable plate (25) and the structural member body (21) are integrally formed by solid plastic; the inner tube (1) is fixed to the structural member dormant adapting hole of the outer tube through the stop buckle (22), and the pause hole or structural member locking hole is further fixed to the lower end, middle part or upper end of the outer tube (3); The structural member (2) further comprises a fixing member (23), the fixing member (23) comprising two fixing plates arranged below the structural member body (21), the fixing plates having inner walls provided with protrusions (26) for fixing with the inner tube (1), the fixing plates of the structural member (2) being turned over to the outer wall of the inner tube (1), the protrusions (26) being fixed in the structural member mounting holes (11) arranged on the inner tube (1) and the mounting holes (27) on the structural member body, thereby fixing the structural member (2) with the inner tube (1); An outer tube fixing buckle (53) is provided on the outer wall of the outer tube structural component body (51), and the outer tube structural component (5) is clamped in an outer tube structural component mounting hole (32) provided at the lower end of the outer tube (3) through the outer tube fixing buckle (53), and is further fixed inside the lower end of the outer tube (3).

2. The self-locking pull rod according to claim 1, characterized in that: A spring (100) for the structural component main body (21) is provided between the stop buckle (22) and the structural component main body (21).

3. The self-locking pull rod according to claim 1, characterized in that: The inner tube (1) is one, and a handle and a structural member (2) are respectively provided at the upper end and the lower end of the inner tube (1).

4. The self-locking pull rod according to claim 1, characterized in that: There are at least two inner tubes (1), wherein the upper and lower ends of the inner tube (1) located in the middle are respectively provided with a sheath (4) and a structural member (2), and the upper and lower ends of the inner tube (1) located at the top are respectively provided with a handle and a structural member (2), and the upper end of the structural member (2) is provided with an unlocking block (29).

5. The self-locking pull rod according to claim 1, characterized in that: The pull rods are a pair of pull rods arranged in parallel, the outer wall of the outer tube (3) of the pull rods is fixed to the object carrier, and the upper end of the inner tube (1) of the pull rods is fixed by a connecting handle.

6. The self-locking pull rod according to claim 1, characterized in that: The structural component mounting hole comprises a stop buckle mounting hole (12).

7. The self-locking pull rod according to claim 1, characterized in that: The stop buckle (22) is arranged on the outer wall of the structural component body (21), and a stop buckle through hole (7) corresponding to the stop buckle (22) is arranged on the outer wall of the structural component body (21), and the structural component body (21) is located on the opposite side of the stop buckle through hole (7).

8. The self-locking pull rod according to claim 1, characterized in that: The structural component dormant adapting hole comprises an outer tube stop buckle dormant hole (37), the structural component stopping hole comprises an outer tube stop buckle stopping hole (6), the outer tube stop buckle stopping hole (6) is located on more than one side of the outer tube, and there is more than one on one side; the structural component locking hole comprises an outer tube stop buckle locking hole (33).

9. The method for using the self-locking pull rod according to any one of claims 1 to 8, characterized in that: The following steps are included: Step 1, pulling the rod: pull the inner tube (1) upwards, the stop buckle (22) is pressed by the inner wall of the outer tube (3) because the inclined surface is facing upwards, so that the stop buckle (22) is retracted from the dormant adapter hole of the structural part, and the inner tube (1) is stopped at different outer tube stop buckle stop holes (6) on the outer tube (3) through the stop buckle (22) according to the height requirements of the user, and the inner tube (1) can only be pulled upwards, and cannot be retracted downwards; Step 2, pull the rod: continue to pull the inner tube (1) upwards. When the inner tube (1) is pulled to the locking hole of the structural part of the outer tube (3), the stop buckle (22) automatically pops out of the outer tube (3) through the locking hole (33) of the outer tube stop buckle. The inner tube (1) can only be pulled upwards and cannot be pulled downwards. Continue to pull the inner tube (1) upwards so that the stop buckle (22) is retracted from the locking hole (33) of the outer tube stop buckle until the upper edge of the fixing part (23) of the structural part (2) of the inner tube (1) touches the lower edge of the sheath (4) of the outer tube (3). The inner tube (1) cannot continue to move upwards. Step 3, retracting the rod: When the stop buckle (22) is separated from the outer tube stop buckle lock hole (33) and moves toward the inner wall of the sheath (4), the stop buckle (22) further moves toward the inside of the structural component body (21) due to the pressure of the inner wall of the sheath (4), until the stop buckle (22) is locked inside the structural component body (21) by the locking plate (28). At this time, the inner tube (1) can be retracted by pressing downwards; Step 4, unlocking: When the inner tube (1) is retracted, the stop buckle (22) is squeezed by the unlocking block 2 (52) of the outer tube structure (5), and then the outer tube stop buckle dormant hole (37) is popped out. At this time, the inner tube (1) can be pulled up next time. At this point, the use of a self-locking pull rod is completed.

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