Telescopic pipe locking structure
By designing the threaded connection part of the expansion member in the telescopic tube locking structure and the threaded connection between the inner support and the expansion ring, the problems of deformation and threaded connection stability of the expansion member in the prior art are solved. It realizes long-term and stable use of the locking structure.
Patent Information
- Application Number
- CN202420585739.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-22
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-03-22
AI Technical Summary
In the existing telescopic tube locking structure, the threaded connection part of the expansion piece overlaps with the extrusion part, causing the extrusion pressure to be transmitted to the threaded connection, affecting the deformation of the expansion piece and the stability of the threaded connection. It is easy to have a connection effect after long-term use. The problem of deterioration.
Design a telescopic tube locking structure in which the threaded connection part and the extrusion part of the expansion member are disconnected. The threaded connection between the inner support and the expansion ring is connected by the threaded connection of the inner support member. The expansion ring is used to be squeezed by the inner support member to avoid the transmission of the extrusion pressure to the connection. The ring ensures that the expansion ring can be deformed and locked through the positioning structure and rotary members.
The easy deformation of the expansion ring and the stable threaded connection of the connecting ring are achieved, which extends the service life of the locking structure and avoids early deterioration of the threaded connection parts.
Smart Images
Figure CN222315572U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of photographic and video equipment, and in particular to a telescopic tube locking structure. 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 inner support member installed on a transmission rod and an expansion member arranged on the outer periphery of the inner support member. The inner support member and the expansion member are threadedly connected. By rotating the transmission rod, the inner support member and the expansion member can be relatively moved along the axial direction of the transmission rod, so that the expansion member is squeezed by the inner support member and expands, thereby squeezing the tube body on its outer periphery to achieve locking. In some existing telescopic tube locking structures, the expansion member is a separate component. When it is squeezed by the inner support member, the squeezing force will be transmitted to the part that is threadedly connected to the inner support member. This requires the expansion member to be suitable for deformation and to maintain a relatively stable threaded connection. This design is unreasonable and is not easy to achieve the expected effect. After long-term use, the connection effect of the threaded connection part is also prone to deterioration.
[0003] Therefore, it is necessary to design a telescopic tube locking structure in which the threaded connection part and the extrusion part of the expansion piece are staggered. 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 locking structure in which the threaded connection part and the extrusion part of the expansion piece are staggered.
[0005] According to the implementation scheme of the utility model, a first solution is provided: a telescopic tube locking structure, comprising:
[0006] first tube body;
[0007] A transmission rod, arranged on the inner circumference of the first tube;
[0008] A locking assembly is arranged on the inner periphery of the first tube body and located on the outer periphery of the transmission rod. The locking assembly includes an inner support member connected to the outer periphery of the transmission rod, a connecting ring threadedly connected to the outer periphery of the inner support member, and an expansion ring arranged on the outer periphery of the inner support member. The inner support member rotates relative to the connecting ring and squeezes the expansion ring from the inside to achieve locking of the first tube body.
[0009] In a preferred solution, the expansion ring is snap-connected to the connecting ring so that the expansion ring and the connecting ring are fixed along the axial direction of the transmission rod.
[0010] In a preferred embodiment, the inner circumference of the expansion ring is provided with a first annular groove and a first convex ring, the outer circumference of the connecting ring is provided with a second annular groove and a second convex ring, the first convex ring passes over the second convex ring and extends into the second annular groove, and the second convex ring extends into the first annular groove.
[0011] In a preferred embodiment, the inner support member includes a connecting portion threadedly connected to the connecting ring, and an extrusion portion for extruding the expansion ring.
[0012] In a preferred solution, the outer diameter of the extrusion portion gradually decreases in a direction approaching the connection portion, and the inner diameter of the expansion ring gradually decreases in this direction.
[0013] In a preferred embodiment, the telescopic tube locking structure further includes a second tube body located at the inner periphery of the first tube body, and the inner support member further includes an extension portion provided at a side of the connecting portion away from the extrusion portion, and the extension portion extends into the inner periphery of the second tube body.
[0014] In a preferred solution, the transmission rod and the inner support member are fixed along the circumferential direction, and the first tube body and the connecting ring are fixed along the circumferential direction.
[0015] In a preferred embodiment, the expansion ring and the connecting ring are both provided with a first positioning structure, and the inner circumference of the first tube body is provided with a second positioning structure, the first positioning structure cooperates with the second positioning structure to fix the first tube body and the connecting ring along the circumferential direction, the first positioning structure is one of the positioning groove and the positioning rib, and the second positioning structure is the other of the positioning groove and the positioning rib.
[0016] In a preferred solution, the telescopic tube locking structure further includes a rotating member disposed on the outer periphery of the transmission rod, and the rotating member is fixed to the transmission rod along the circumferential direction.
[0017] In a preferred embodiment, the telescopic tube locking structure further includes a lifting wrench and a universal joint linking the transmission rod and the lifting wrench.
[0018] The utility model has the following beneficial effects:
[0019] The expansion piece is designed to be a connecting ring and an expansion ring. The connecting ring is used for threaded connection with the inner support piece, and the expansion ring is used to be squeezed by the inner support piece. Since the threaded connection part and the squeezing part are staggered, the squeezing force on the expansion ring will not be transmitted to the connecting ring, so that the expansion ring can be easily deformed, and the connecting ring can also maintain a stable threaded connection for a long time. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a cross-sectional schematic diagram of a telescopic tube locking structure according to an embodiment of the utility model;
[0021] Figure 2 for Figure 1 The enlarged view of point a in FIG.
[0022] Figure 3 It is a schematic diagram of a telescopic tube with a rotating member according to an embodiment of the utility model;
[0023] Figure 4 This is an exploded view of the telescopic tube locking structure according to one embodiment of the utility model.
[0024] Figure numerals: 1, first tube body; 11, second positioning structure; 2, transmission rod; 3, locking assembly; 31, inner support member; 311, connecting portion; 312, extruding portion; 313, extending portion; 32, connecting ring; 321, second annular groove; 322, second convex ring; 33, expansion ring; 331, first annular groove; 332, first convex ring; 34, first positioning structure; 4, second tube body; 5, rotating member; 6, lifting wrench; 7, universal joint; 8, mounting tube; DETAILED DESCRIPTION
[0025] 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.
[0026] 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.
[0027] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "
[0028] 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.
[0029] 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.
[0030] 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.
[0031] Please refer to Figure 1 to Figure 4 An embodiment of the utility model provides a telescopic tube locking structure, which includes: a first tube body 1, a transmission rod 2 and a locking assembly 3. The transmission rod 2 is arranged on the inner periphery of the first tube body 1, the locking assembly 3 is arranged on the inner periphery of the first tube body 1, and the locking assembly 3 is located on the outer periphery of the transmission rod 2. The locking assembly 3 includes an inner support member 31, a connecting ring 32 and an expansion ring 33. The inner support member 31 is connected to the outer periphery of the transmission rod 2 and can rotate with the transmission rod 2. The connecting ring 32 and the expansion ring 33 are both arranged on the outer periphery of the inner support member 31, and the connecting ring 32 and the expansion ring 33 are arranged and connected together along the axial direction of the transmission rod 2, and the connecting ring 32 is threadedly connected to the inner support member 31.
[0032] In this embodiment, the transmission rod 2 can be rotated to drive the inner support member 31 to rotate synchronously, so that the connecting ring 32 drives the expansion ring 33 to move along the axial direction of the transmission rod 2, so that the inner support member 31 can squeeze the expansion ring 33 from the inside. After the expansion ring 33 expands, it contacts the inner wall of the first tube body 1 and increases the friction force to achieve the locking of the first tube body 1. Among them, the expansion member is designed as a connecting ring 32 and an expansion ring 33. The connecting ring 32 is used for threaded connection with the inner support member 31, and the expansion ring 33 is used to be squeezed by the inner support member 31. Since the threaded connection part 311 and the squeezing part 312 are staggered, the squeezing force on the expansion ring 33 will not be transmitted to the connecting ring 32, so that the expansion ring 33 can be easily deformed, and the connecting ring 32 can also maintain a stable threaded connection for a long time.
[0033] In a preferred embodiment, reference may be made to Figure 1 , Figure 2 and Figure 4The expansion ring 33 is snap-connected with the connecting ring 32, so that the expansion ring 33 and the connecting ring 32 are fixed along the axial direction of the transmission rod 2, and then the expansion ring 33 and the connecting ring 32 can move together along the axial direction of the transmission rod 2. Specifically, the inner circumference of the expansion ring 33 is provided with a first annular groove 331 and a first convex ring 332, and the outer circumference of the connecting ring 32 is provided with a second annular groove 321 and a second convex ring 322, the first convex ring 332 passes over the second convex ring 322 and extends into the second annular groove 321, and the second convex ring 322 extends into the first annular groove 331.
[0034] In a preferred embodiment, the inner support member 31 is provided with a connecting portion 311 and an extruding portion 312 in sequence along the axial direction, the connecting portion 311 can be threadedly connected to the connecting ring 32, and the extruding portion 312 can be used to extrude the expansion ring 33. In this embodiment, the connecting portion 311 and the extruding portion 312 are staggered so that the connecting portion 311 will not be subjected to an extrusion force, thereby being able to maintain a stable threaded connection for a long time.
[0035] In a specific embodiment, the outer diameter of the extrusion portion 312 gradually decreases in the direction close to the connection portion 311, and the inner diameter of the expansion ring 33 gradually decreases in this direction. Of course, in other embodiments, it can also be designed that the outer diameter of the extrusion portion 312 gradually decreases in the direction close to the connection portion 311, and the inner diameter of the expansion ring 33 gradually decreases in this direction.
[0036] In a preferred implementation, reference may be made to Figure 1 The telescopic tube locking structure also includes a second tube body 4, which is located on the inner periphery of the first tube body 1. The inner support member 31 also includes an extension portion 313, which is located on the side of the connecting portion 311 away from the extrusion portion 312, and the extension portion 313 extends into the inner periphery of the second tube body 4.
[0037] In a preferred embodiment, the transmission rod 2 and the inner support member 31 are fixed along the circumferential direction so that the transmission rod 2 and the inner support member 31 can rotate synchronously, and the first tube body 1 and the connecting ring 32 are fixed along the circumferential direction so that the first tube body 1 and the connecting ring 32 cannot rotate relative to each other.
[0038] Specifically, the cross-sections of the transmission rod 2 and the inner support member 31 may be designed to be non-circular, such as a polygonal structure, or matching protrusions and grooves may be provided on the side walls of the transmission rod 2 and the inner support member 31, so as to achieve circumferential fixation.
[0039] Specifically, please refer to Figure 4, the expansion ring 33 and the connecting ring 32 are both provided with a first positioning structure 34, and the inner circumference of the first tube body 1 is provided with a second positioning structure 11, the first positioning structure 34 cooperates with the second positioning structure 11 to fix the first tube body 1 and the connecting ring 32 in the circumferential direction, the first positioning structure 34 is one of the positioning groove and the positioning rib, and the second positioning structure 11 is the other of the positioning groove and the positioning rib. Exemplarily, the expansion ring 33 and the connecting ring 32 are both provided with a positioning groove, which can cooperate with the positioning rib on the inner wall of the first tube body 1, wherein the positioning groove and the positioning rib both extend along the axial direction of the transmission rod 2.
[0040] In a preferred implementation, reference may be made to Figure 3 The telescopic tube locking structure further includes a rotating member 5, which is disposed on the outer periphery of the transmission rod 2. The rotating member 5 and the transmission rod 2 are fixed along the circumferential direction and can be used to drive the transmission rod 2 to rotate. In this embodiment, the user can conveniently lock and unlock the first tube body 1 by rotating the rotating member 5. Preferably, the side wall of the rotating member 5 is provided with anti-slip textures to facilitate the user to rotate the rotating member 5.
[0041] In a preferred implementation, reference may be made to Figure 4 The telescopic tube locking structure further includes a lifting wrench 6 and a universal joint 7. The universal joint 7 can link the transmission rod 2 and the lifting wrench 6, so that the user can drive the transmission rod 2 to rotate by rotating the lifting wrench 6, thereby conveniently realizing the locking and unlocking of the first tube body 1. Preferably, the telescopic tube locking structure further includes a mounting tube 8 provided on the outer periphery of the first tube body 1, and the lifting wrench 6 is rotatably mounted on the mounting tube 8.
[0042] 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 locking structure, characterized in that: include: first tube body; A transmission rod, arranged on the inner circumference of the first tube; A locking assembly is arranged on the inner periphery of the first tube body and located on the outer periphery of the transmission rod. The locking assembly includes an inner support member connected to the outer periphery of the transmission rod, a connecting ring threadedly connected to the outer periphery of the inner support member, and an expansion ring arranged on the outer periphery of the inner support member. The inner support member rotates relative to the connecting ring and squeezes the expansion ring from the inside to achieve locking of the first tube body.
2. The telescopic tube locking structure according to claim 1, characterized in that: The expansion ring is snap-connected with the connecting ring so that the expansion ring and the connecting ring are fixed along the axial direction of the transmission rod.
3. The telescopic tube locking structure according to claim 2, characterized in that: The inner circumference of the expansion ring is provided with a first annular groove and a first convex ring, the outer circumference of the connecting ring is provided with a second annular groove and a second convex ring, the first convex ring passes over the second convex ring and extends into the second annular groove, and the second convex ring extends into the first annular groove.
4. The telescopic tube locking structure according to claim 1, characterized in that: The inner support member includes a connecting portion threadedly connected to the connecting ring, and an extruding portion for extruding the expansion ring.
5. The telescopic tube locking structure according to claim 4, characterized in that: The outer diameter of the extrusion portion gradually decreases along a direction approaching the connection portion, and the inner diameter of the expansion ring gradually decreases along the direction.
6. The telescopic tube locking structure according to claim 4, characterized in that: The telescopic tube locking structure further includes a second tube body located at the inner periphery of the first tube body, and the inner support member further includes an extension portion located at a side of the connecting portion away from the extrusion portion, and the extension portion extends into the inner periphery of the second tube body.
7. The telescopic tube locking structure according to claim 1, characterized in that: The transmission rod and the inner support member are fixed along the circumferential direction, and the first tube body and the connecting ring are fixed along the circumferential direction.
8. The telescopic tube locking structure according to claim 7, characterized in that: The expansion ring and the connecting ring are both provided with a first positioning structure, and the inner circumference of the first tube body is provided with a second positioning structure. The first positioning structure cooperates with the second positioning structure to fix the first tube body and the connecting ring along the circumferential direction. The first positioning structure is one of the positioning groove and the positioning rib, and the second positioning structure is the other of the positioning groove and the positioning rib.
9. The telescopic tube locking structure according to any one of claims 1 to 8, characterized in that: The telescopic tube locking structure further comprises a rotating member arranged on the outer periphery of the transmission rod, and the rotating member is fixed to the transmission rod along the circumferential direction.
10. The telescopic tube locking structure according to any one of claims 1 to 8, characterized in that: The telescopic tube locking structure also includes a lifting wrench and a universal joint linking the transmission rod and the lifting wrench.