Telescopic pipe structure convenient to lock

Abstract

The utility model provides a telescopic pipe structure convenient to lock. The telescopic pipe structure comprises a first pipe body, a transmission rod, an expansion assembly, a universal joint and a lifting wrench. The transmission rod is arranged on the inner circumference of the first pipe body, the expansion assembly is arranged on the outer circumference of the transmission rod and located on the inner circumference of the first pipe body, one end of the universal joint is connected with the transmission rod, the other end of the universal joint is connected with the lifting wrench, the lifting wrench is rotated to drive the transmission rod to rotate, and the expansion assembly is arranged on the outer circumference of the transmission rod and located on the inner circumference of the first pipe body. Therefore, the expansion assembly expands to lock the first pipe body, or the expansion assembly contracts to unlock the first pipe body. According to the telescopic pipe structure, the lifting wrench and the transmission rod are linked through the universal joint, the scheme is simple in structure, direct contact and abrasion between gears are avoided through the transmission mode of the telescopic pipe structure, the reliability is high for a long time, the product is more durable, and the production cost is low.

Description

Technical Field

[0001] The present application relates to the technical field of photographic and video equipment, and in particular to a telescopic tube structure that is easy to lock. Background Art

[0002] Some products in the field of photography and videography, such as tripods and monopods, usually have telescopic tubes with adjustable lengths and locking structures for locking the telescopic tubes. In some telescopic tube products, the locking structure includes an expansion assembly installed on a transmission rod. By rotating the transmission rod along the axial direction of the telescopic tube, the expansion assembly can be driven to expand or contract, thereby achieving the locking and unlocking of the telescopic tube. In order to facilitate the user to perform locking and unlocking operations, the telescopic tube will also be provided with a pull-up wrench that can rotate radially around the telescopic tube. The user can drive the transmission rod to rotate by rotating the pull-up wrench. In order to achieve the linkage between the pull-up wrench and the transmission rod, in the patent with application number 202320754150, two sets of gears and bidirectional spur gear blocks are used for transmission, and in the patent with application number 2022 22041076, two bevel gears are used for transmission. In the above two schemes using gear transmission, the structure is relatively complicated, and because the gears are easy to wear, it is easy to cause the transmission effect and service life of the product to decrease. At the same time, its cost is high and production is more troublesome.

[0003] Therefore, it is necessary to provide a telescopic tube structure which is simple in structure, more durable and easy to lock. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the utility model is to provide a telescopic tube structure which is simple in structure, more durable and easy to lock.

[0005] According to the implementation scheme of the utility model, a first scheme is provided: a telescopic tube structure that is easy to lock, comprising a first tube body, a transmission rod, an expansion assembly, a universal joint and a lifting wrench; the transmission rod is arranged on the inner periphery of the first tube body, the expansion assembly is arranged on the outer periphery of the transmission rod and is located on the inner periphery of the first tube body, one end of the universal joint is connected to the transmission rod, and the other end of the universal joint is connected to the lifting wrench, and the transmission rod is driven to rotate by rotating the lifting wrench, so that the expansion assembly expands to lock the first tube body, or contracts to release the lock.

[0006] In a preferred solution, the lifting wrench rotates radially around the first tube body, driving the transmission rod to rotate axially around the first tube body.

[0007] In a preferred solution, the telescopic tube structure that is easy to lock further includes a mounting joint sleeved on the top of the first tube body, and the lifting wrench is rotatably connected to the mounting joint.

[0008] In a preferred embodiment, the mounting joint is provided with a first mounting hole and a second mounting hole, the axis of the first mounting hole coincides with the axis of the second mounting hole, and the lifting wrench rotates around the axis of the first mounting hole.

[0009] In a preferred embodiment, one end of the universal joint is rotatably disposed in the first mounting hole and is fixedly connected to the lifting wrench.

[0010] In a preferred solution, the other end of the universal joint is fixedly connected to the transmission rod.

[0011] In a preferred embodiment, the mounting joint includes a first mounting portion for mounting the lifting wrench, and a second mounting portion sleeved on the outer circumference of the first tube body, the bottom of the first mounting portion is provided with an internal thread, and the top of the second mounting portion is provided with an external thread matching the internal thread.

[0012] In a preferred embodiment, the expansion assembly includes an inner expansion member and an outer expansion member, the inner expansion member is sleeved on the outer circumference of the transmission rod and circumferentially fixed to the transmission rod, and the outer expansion member is arranged between the inner expansion member and the first tube body.

[0013] In a preferred embodiment, the inner expansion member is threadedly connected to the outer expansion member, the outer expansion member is circumferentially fixed to the first tube body, and the transmission rod is rotated to drive the inner expansion member to rotate, so that the inner expansion member squeezes the outer expansion member from the inside.

[0014] In a preferred embodiment, the outer expansion member includes an expansion ring and a connecting ring, the expansion ring is snap-connected to the connecting ring, and the inner expansion member includes an extrusion portion for extruding the expansion ring and a connecting portion threadedly connected to the connecting ring.

[0015] The utility model has the following beneficial effects:

[0016] In the telescopic tube structure, the lifting wrench and the transmission rod are linked by a universal joint. This solution has a simple structure and its transmission method avoids direct contact and wear between gears. In the long run, it has high reliability, the product is more durable, and the production cost is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of a telescopic tube structure product for easy locking according to an embodiment of the utility model;

[0018] Figure 2 This is a cross-sectional schematic diagram of a telescopic tube structure that is easy to lock according to an embodiment of the utility model;

[0019] Figure 3This is an exploded view of a telescopic tube structure that is easy to lock according to an embodiment of the utility model.

[0020] Reference numerals: 1, first tube body; 2, transmission rod; 31, inner expansion member; 311, extrusion portion; 312, connection portion; 32, outer expansion member; 321, expansion ring; 322, connection ring; 4, universal joint; 5, lifting wrench; 6, mounting joint; 61, first mounting hole; 62, second mounting hole; 63, first mounting portion; 64, second mounting portion; DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of this application.

[0022] It should be noted that when an element is referred to as being "fixed on" or "set on" another component, it can be directly on the other component or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component.

[0023] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "

[0024] The orientations or positional relationships indicated by "horizontal", "vertical", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the drawings and are only for the convenience of describing the present application and simplifying the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limitations on the present application.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0026] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them. They are not used to limit the conditions under which this application can be implemented, so they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0027] Please refer to Figure 1 to Figure 3 An embodiment of the utility model provides a telescopic tube structure that is easy to lock, and the telescopic tube structure that is easy to lock includes a first tube body 1, a transmission rod 2, an expansion assembly, a universal joint 4, and a lifting wrench 5. Among them, the transmission rod 2 is used to link the expansion assembly, the expansion assembly is used to expand to lock the first tube body 1, and the universal joint 4 is used to link the lifting wrench 5 and the transmission rod 2.

[0028] Specifically, the transmission rod 2 is arranged on the inner periphery of the first tube body 1, the expansion assembly is arranged on the outer periphery of the transmission rod 2, and the expansion assembly is located on the inner periphery of the first tube body 1, one end of the universal joint 4 is connected to the transmission rod 2, and the other end of the universal joint 4 is connected to the lifting wrench 5. In this embodiment, the universal joint 4 links the lifting wrench 5 and the transmission rod 2, so the transmission rod 2 can be driven to rotate by rotating the lifting wrench 5, so that the expansion assembly expands to lock the first tube body 1, or contracts to release the lock.

[0029] In this embodiment, the lifting wrench and the transmission rod 2 are linked via the universal joint 4. This solution has a simple structure and its transmission method avoids direct contact and wear between gears. In the long run, it has high reliability, the product is more durable, and the production cost is also low.

[0030] In a specific embodiment, reference may be made to Figure 2 and Figure 3 The lifting wrench 5 rotates radially around the first tube body 1, driving the transmission rod 2 to rotate axially around the first tube body 1. The directions of the rotation axes of the lifting wrench 5 and the transmission rod 2 are perpendicular, and the universal joint 4 can well transmit the force to achieve a linkage effect.

[0031] In a preferred embodiment, the telescopic tube structure for easy locking further includes a mounting joint 6 , which is sleeved on the top of the first tube body 1 , and the lifting wrench 5 is rotatably connected to the mounting joint 6 .

[0032] In a preferred embodiment, the mounting joint 6 is provided with a first mounting hole 61 and a second mounting hole 62, which can be referred to Figure 2The first mounting hole 61 and the second mounting hole 62 are respectively arranged on opposite sides of the mounting joint 6, and can be used to install the pulling wrench 5, wherein the axis of the first mounting hole 61 coincides with the axis of the second mounting hole 62, and the pulling wrench 5 rotates around the axis of the first mounting hole 61.

[0033] In a preferred embodiment, reference may be made to Figure 2 One end of the universal joint 4 is rotatably disposed in the first mounting hole 61 and is fixedly connected to the lifting wrench 5. A connecting member may be provided to sequentially connect the lifting wrench 5 and the end of the universal joint 4, so that the end of the universal joint 4 can rotate synchronously with the lifting wrench 5.

[0034] In a preferred embodiment, reference may be made to Figure 2 , the other end of the universal joint 4 extends into the inner circumference of the transmission rod 2 and is fixedly connected to the transmission rod 2. In this embodiment, the end of the universal joint 4 extending into the inner circumference of the transmission rod 2 can be arranged to form an interference fit with the transmission rod 2, so that the universal joint 4 can well drive the transmission rod 2 to rotate.

[0035] In a preferred embodiment, reference may be made to Figure 2 The mounting joint 6 includes a first mounting portion 63 and a second mounting portion 64. The lifting wrench 5 is mounted on the first mounting portion 63, and the second mounting portion 64 is sleeved on the outer periphery of the first tube body 1. The bottom of the first mounting portion 63 is provided with an internal thread, and the top of the second mounting portion 64 is provided with an external thread matching the internal thread. The first mounting portion 63 and the second mounting portion 64 can be assembled and mounted together by rotation.

[0036] In a preferred embodiment, the expansion assembly includes an inner expansion member 31 and an outer expansion member 32, wherein the inner expansion member 31 is used to squeeze the outer expansion member 32 from the inside, so that the outer expansion member 32 contacts the inner wall of the first tube body 1 and increases the friction force, thereby locking the first tube body 1. The inner expansion member 31 is sleeved on the outer periphery of the transmission rod 2, and the inner expansion member 31 and the transmission rod 2 are circumferentially fixed, so that the inner expansion member 31 and the transmission rod 2 can rotate synchronously, and the outer expansion member 32 is arranged between the inner expansion member 31 and the first tube body 1.

[0037] Furthermore, the inner expansion member 31 is threadedly connected to the outer expansion member 32, and the outer expansion member 32 is circumferentially fixed to the first tube body 1, so that the outer expansion member 32 and the first tube body 1 cannot rotate relative to each other. In this embodiment, the inner expansion member 31 can be driven to rotate by rotating the transmission rod 2, and the inner expansion member 31 squeezes the outer expansion member 32 from the inside.

[0038] Further, please refer to Figure 2 and Figure 3The outer expansion member 32 includes an expansion ring 321 and a connecting ring 322, and the expansion ring 321 is snap-connected with the connecting ring 322. The inner expansion member 31 includes an extrusion portion 311 and a connecting portion 312. For example, the outer diameter of the extrusion portion 311 gradually decreases axially downward, so that when it moves axially downward, it will gradually squeeze the expansion ring 321, so that the expansion ring 321 gradually expands to achieve a locking effect. The connecting portion 312 is threadedly connected with the connecting ring 322, so that when the transmission rod 2 rotates, the inner expansion member 31 and the outer expansion member 32 can move relative to each other along the axial direction of the transmission rod 2.

[0039] Specifically, the circumferential fixation between the outer expansion member 32 and the first tube body 1 can be achieved by providing one of the positioning ribs or positioning grooves on the expansion ring 321 and the connecting ring 322, and providing the other on the inner wall of the first tube body 1. Figure 3 The expansion ring 321 and the connecting ring 322 are both provided with positioning grooves extending along the axial direction, and the inner wall of the first tube body 1 is provided with positioning ribs extending along the axial direction. The positioning ribs and the positioning grooves cooperate with each other, so that the expansion ring 321 and the connecting ring 322 cannot rotate relative to the first tube body 1.

[0040] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A telescopic tube structure that is easy to lock, characterized in that: It includes a first tube body, a transmission rod, an expansion assembly, a universal joint and a lifting wrench; the transmission rod is arranged on the inner periphery of the first tube body, the expansion assembly is arranged on the outer periphery of the transmission rod and is located on the inner periphery of the first tube body, one end of the universal joint is connected to the transmission rod, and the other end of the universal joint is connected to the lifting wrench, and the transmission rod is driven to rotate by rotating the lifting wrench, so that the expansion assembly expands to lock the first tube body, or contracts to release the lock.

2. The telescopic tube structure that is easy to lock according to claim 1, characterized in that: The lifting wrench rotates around the radial direction of the first tube body, driving the transmission rod to rotate around the axial direction of the first tube body.

3. The telescopic tube structure that is easy to lock according to claim 1, characterized in that: The telescopic tube structure that is easy to lock also includes a mounting joint sleeved on the top of the first tube body, and the lifting wrench is rotatably connected to the mounting joint.

4. The telescopic tube structure that is easy to lock according to claim 3, characterized in that: The mounting joint is provided with a first mounting hole and a second mounting hole, the axis of the first mounting hole coincides with the axis of the second mounting hole, and the lifting wrench rotates around the axis of the first mounting hole.

5. The telescopic tube structure that is easy to lock according to claim 4, characterized in that: One end of the universal joint is rotatably disposed in the first mounting hole and is fixedly connected to the lifting wrench.

6. The telescopic tube structure that is easy to lock according to claim 5, characterized in that: The other end of the universal joint is fixedly connected to the transmission rod.

7. The telescopic tube structure that is easy to lock according to claim 3, characterized in that: The mounting joint includes a first mounting portion for mounting the lifting wrench, and a second mounting portion sleeved on the outer circumference of the first tube body, the bottom of the first mounting portion is provided with an internal thread, and the top of the second mounting portion is provided with an external thread matching the internal thread.

8. The telescopic tube structure for easy locking according to any one of claims 1 to 7, characterized in that: The expansion assembly includes an inner expansion member and an outer expansion member. The inner expansion member is sleeved on the outer circumference of the transmission rod and circumferentially fixed to the transmission rod. The outer expansion member is arranged between the inner expansion member and the first tube body.

9. The telescopic tube structure that is easy to lock according to claim 8, characterized in that: The inner expansion member is threadedly connected to the outer expansion member, and the outer expansion member is circumferentially fixed to the first tube body. The transmission rod is rotated to drive the inner expansion member to rotate, and the inner expansion member squeezes the outer expansion member from the inside.

10. The telescopic tube structure that is easy to lock according to claim 9, characterized in that: The outer expansion member comprises an expansion ring and a connection ring, the expansion ring is snap-connected with the connection ring, and the inner expansion member comprises an extrusion portion for extruding the expansion ring and a connection portion threadedly connected with the connection ring.

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