Interactive variable cross-section locking structure
By designing the locking structure of alternating arc segments and plane segments in the telescopic tube fittings of the photographic and imaging equipment, the problem of loosening of the locking structure after being impacted is solved, and higher locking strength and stability are achieved.
Patent Information
- Application Number
- CN202421985156.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-16
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-08-16
AI Technical Summary
The locking structure in the commonly used telescopic pipe fitting structure in existing photography and imaging equipment has poor anti-shock and anti-loosening functions, and is prone to loosening when impacted or vibration, resulting in failure of the locking function.
An interactive variable cross-section locking structure on the support rod is designed. By setting alternate arc segments and planar segment structures on the locking surface, locking is achieved by rotating extrusion, and locking strength and stability are improved through limit positioning and gradually thickening cross-sectional structures.
It effectively reduces the phenomenon of loosening of the locking structure after being impacted, improves the locking strength and stability, and ensures the reliability of the locking function.
Smart Images
Figure CN222823495U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of photography and videography auxiliary equipment, and in particular relates to an interactive variable cross-section locking structure on a support rod. Background Art
[0002] Tripods, support frames, telescopic rods and other devices are commonly used auxiliary tools in the photography and videography industries. These tools generally have a retractable sleeve structure, which can be adjusted in length by extension and can be locked for positioning, making them easy to operate.
[0003] At present, the locking structure in this type of telescopic pipe structure is generally a rotating locking structure, which squeezes the locking piece between the inner tube and the outer tube by rotation to achieve locking. However, in the conventional locking structure, the anti-vibration and anti-loosening function of the squeezing locking structure is poor, and it is easy to loosen when it is hit or vibrated, resulting in the failure of the locking function, causing unnecessary accidents and losses.
[0004] Based on this, the present application further designs and improves the locking structure in the telescopic tube. Utility Model Content
[0005] In response to the above-mentioned deficiencies in the prior art, the utility model provides an interactive variable-section locking structure on a support rod, which can be locked by rotation and extrusion, and a unique arc-surface-plane alternating structure is adopted on the locking surface, which can effectively reduce the loosening phenomenon of the locking structure after impact, and has high locking strength and better stability.
[0006] The utility model solves the problem through the following technical solutions.
[0007] An interactive variable cross-section locking structure on a support rod comprises an inner sleeve and an outer sleeve which are relatively rotatable and are arranged between an outer tube and an inner tube, wherein the outer surface of the inner sleeve has a first extrusion surface, and the inner surface of the outer sleeve has a second extrusion surface, and the first extrusion surface and the second extrusion surface can be extruded and locked by relative movement; the first extrusion surface has a plurality of arc segments a and plane segments b arranged alternately; the second extrusion surface also has a plurality of arc segments a and plane segments b arranged alternately; the arc segments a and the plane segments b are both arranged along the axial direction of rotation.
[0008] In the current conventional locking sleeve structure, locking is achieved by relative rotation and relying on the extrusion of two locking surfaces. The structure is simple, but it is easy to loosen after being impacted. In the present application, an alternating structure of arc segments a and plane segments b is set on the two corresponding extrusion surfaces. This innovative structural design is different from the ordinary eccentric locking section. The pressure of the plane segment b after locking has no component force tangent to the circumferential direction, thereby avoiding the phenomenon of loosening of the support rod after being impacted, and the support stability and strength are better, which well solves the defect that the current eccentric locking structure is easy to loosen after being shaken.
[0009] In a preferred embodiment, a first limit position is provided on the first extrusion surface, and a second limit position is provided on the second extrusion surface, which play a limiting role in the relative rotation process to avoid excessive rotation.
[0010] In a preferred embodiment, the inner sleeve is limited on the inner tube, and the outer sleeve is limited on the outer tube. The inner tube and the outer tube can rotate relative to each other and drive the inner sleeve and the outer sleeve to rotate relative to each other. The operation is convenient and the locking and unlocking operations can be performed flexibly.
[0011] In a preferred embodiment, the inner bushing and the inner tube are assembled and limited by means of protrusions and mounting holes; the outer bushing and the outer tube are limited by means of convex strips and slots.
[0012] In a preferred embodiment, the outer sleeve is at least two symmetrically arranged arc-shaped parts, and slots are formed between adjacent arc-shaped parts. The convex strips are arranged on the inner wall of the outer tube. After assembly, the convex strips are inserted into the slots to achieve synchronous rotation. The slots can be gaps between adjacent arc-shaped parts; the inner sleeve is a matching arc-shaped sheet arranged in the outer sleeve.
[0013] In a preferred embodiment, the protrusion is arranged on the inner wall of the inner bushing, and the mounting hole is arranged on the tube wall of the inner tube. After assembly, the protrusion is embedded in the mounting hole to achieve synchronous rotation.
[0014] In a preferred embodiment, the cross-section of the inner bushing and the outer bushing at the extrusion surface structure has a gradually thickening structure, so that a locking force is generated during extrusion, and they can be easily locked and unlocked during relative rotation.
[0015] In a preferred embodiment, the outer bushing is provided with a limiting groove, and the inner bushing is provided with a limiting protrusion in the limiting groove. During the relative rotation of the outer bushing and the inner bushing, the limiting protrusion moves in the limiting groove and is limited after abutting against the wall of the limiting groove so that the bushing cannot rotate further. The structure is simple and the limiting function is good.
[0016] In a preferred embodiment, an anti-drop sleeve is provided between the outer tube and the inner tube to prevent the outer tube and the inner tube from separating and falling out of each other.
[0017] In a preferred embodiment, the anti-drop bushing is positioned in a positioning hole on the tube wall at one end of the outer tube by means of a protruding block thereon, thereby achieving positioning.
[0018] Compared with the prior art, the utility model has the following beneficial effects: it provides an interactive variable cross-section locking structure on a support rod, which can be locked by rotation and extrusion, and a unique arc-plane alternating structure is adopted on the locking surface, which can effectively reduce the loosening phenomenon caused by the locking structure after impact, and has high locking strength and better stability. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a stereoscopic diagram of the locking structure of the utility model installed in a pipe fitting.
[0020] Figure 2 for Figure 1 The outer tube is omitted in the stereogram.
[0021] Figure 3 for Figure 2 Magnified view of area A.
[0022] Figure 4 It is a schematic diagram of the assembly of the locking structure and the pipe fitting in the utility model.
[0023] Figure 5 The three-dimensional structure of the inner sleeve and the outer sleeve in the utility model Figure 1 .
[0024] Figure 6 The three-dimensional structure of the inner sleeve and the outer sleeve in the utility model Figure 2 .
[0025] Figure 7 It is a three-dimensional diagram of the outer bushing in the utility model.
[0026] Figure 8 It is a three-dimensional diagram of the inner liner in the utility model.
[0027] Fig. 9 It is a cross-sectional view of the anti-dropping bushing structure in the utility model.
[0028] Fig.10 It is a cross-sectional view of the locking structure in the utility model.
[0029] Fig.11 A schematic cross-sectional view of the outer bushing.
[0030] Fig.12 A schematic cross-sectional view of the inner sleeve.
[0031] Fig.13 A three-dimensional locking structure in another embodiment of the present application Figure 1 .
[0032] Fig.14 A three-dimensional locking structure in another embodiment of the present application Figure 2 .
[0033] Fig.15 A cross-sectional view of a locking structure in another embodiment of the present application with one outer sleeve omitted. DETAILED DESCRIPTION
[0034] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0035] In the following embodiments, the same or similar numbers throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.
[0036] In the description of the present utility model, it should be understood that the terms: center, longitudinal, transverse, length, width, thickness, up, down, front, back, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present utility model and simplifying the description, and therefore cannot be understood as limiting the present utility model. In addition, the terms: first, second, etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features shown. In the description of the present utility model, unless otherwise clearly specified and limited, the terms: install, connect, connect, etc. should be understood in a broad sense, and ordinary technicians in this field can understand the specific meanings of the above terms in this application according to the specific circumstances.
[0037] See also Figures 1 to 12 The utility model involves an interactive variable cross-section locking structure on a support rod, comprising an inner sleeve 4 and an outer sleeve 3 which are relatively rotatable and arranged between an outer tube 2 and an inner tube 1, wherein the outer surface of the inner sleeve 4 has a first extrusion surface 47, and the inner surface of the outer sleeve 3 has a second extrusion surface 37, and the first extrusion surface 47 and the second extrusion surface 37 can be extruded and locked through relative movement; the first extrusion surface 47 has a plurality of arc segments a and plane segments b arranged alternately; the second extrusion surface 37 also has a plurality of arc segments a and plane segments b arranged alternately; the arc segments a and the plane segments b are both arranged along the axial direction of rotation.
[0038] Specifically, from the attached Fig.11 and attached Fig.12It can be seen that the first extrusion surface 47 and the second extrusion surface 37 are both provided with 8 to 10 arc segments a and plane segments b alternating with each other, the arc segment a is a convex arc surface, and the plane segment b is a plane surface.
[0039] In addition, in the structure of the present application, an anti-drop bushing 6 is provided between the outer tube 2 and the inner tube 1 to prevent the outer tube 2 and the inner tube 1 from being separated from each other. The anti-drop bushing 6 is positioned in the positioning hole 26 on the tube wall at one end of the outer tube 2 through the protruding block 66 thereon to achieve positioning.
[0040] Specifically, in the present application, a first limit position 471 is provided on the first extrusion surface 47, and a second limit position 371 is provided on the second extrusion surface 37, which play a role of limiting during the relative rotation to prevent excessive rotation. The cross-section of the inner bushing 4 and the outer bushing 3 at the extrusion surface structure has a gradually thickening structure, so that a locking force is generated during extrusion, and it can be easily locked and unlocked during relative rotation. The upper and lower edges of the outer bushing 3 are also provided with inwardly protruding convex edges 34, which play a supporting role on the pipe wall.
[0041] In the present application, the inner bushing 4 is limited on the inner tube 1, and the outer bushing 3 is limited on the outer tube 2. The inner tube 1 and the outer tube 2 can rotate relative to each other and drive the inner bushing 4 and the outer bushing 3 to rotate relative to each other. The operation is convenient and the locking and unlocking operations can be performed flexibly. Specifically, the inner bushing 4 and the inner tube 1 are assembled and limited by the protrusion 45 and the mounting hole 15; the outer bushing 3 and the outer tube 2 are limited by the protrusion 8 and the slot 35.
[0042] In a specific embodiment, as shown in the drawings, the outer bushing 3 is two symmetrically arranged arc-shaped pieces (or three or four as needed), a slot 35 is formed between adjacent arc-shaped pieces, the convex strip 8 is arranged on the inner wall of the outer tube 2, and the convex strip 8 is inserted into the slot 35 after assembly to achieve synchronous rotation, and the slot 35 can be the gap between adjacent arc-shaped pieces; the inner bushing 4 is a matching arc-shaped piece arranged in the outer bushing 3. The protrusion 45 is arranged on the inner wall of the inner bushing 4, and the mounting hole 15 is arranged on the tube wall of the inner tube 1. After assembly, the protrusion 45 is embedded in the mounting hole 15 to achieve synchronous rotation.
[0043] In addition, in another specific embodiment of the present application, Figures 13 to 15 As shown, the outer bushing 3 is provided with a limiting groove 366, and the inner bushing 4 is provided with a limiting protrusion 466 in the limiting groove 366. During the relative rotation of the outer bushing 3 and the inner bushing 4, the limiting protrusion 466 moves in the limiting groove 366 and abuts against the wall of the limiting groove 366 to achieve limiting and no further rotation. The structure is simple and the limiting function is good. In this embodiment, the upper convex edge 34 of the outer bushing 3 has a larger width so that it can be hung on the end surface of the inner tube 1.
[0044] It can be seen from the above description that in the present application, an alternating structure of arc segments a and plane segments b is arranged on the two corresponding extrusion surfaces. This innovative structural design is different from the ordinary eccentric locking section. The pressure of the plane segment b has no component of force tangential to the circumferential direction after locking, thereby avoiding the phenomenon of loosening of the support rod after impact, and the support stability and strength are better, which also solves the defect that the current eccentric locking structure is prone to loosening after being shaken.
[0045] As described above, the utility model provides an interactive variable cross-section locking structure on a support rod, which can be locked by rotation and extrusion, and a unique arc-plane alternating structure is adopted on the locking surface, which can effectively reduce the loosening phenomenon of the locking structure after impact, and has high locking strength and better stability.
[0046] The protection scope of the present invention includes but is not limited to the above embodiments. The protection scope of the present invention shall be based on the claims. Any replacement, deformation, and improvement of the technology that can be easily thought of by technicians in this field shall fall within the protection scope of the present invention.
Claims
1. An alternating variable cross-section locking structure on a support rod, comprising an inner sleeve (4) and an outer sleeve (3) arranged between an outer tube (2) and an inner tube (1) and capable of relatively rotating, characterized in that: The inner bushing (4) has a first extrusion surface (47) on its outer surface, and the outer bushing (3) has a second extrusion surface (37) on its inner surface, and the first extrusion surface (47) and the second extrusion surface (37) can be extruded and locked by relative movement; The first extrusion surface (47) has a plurality of arc segments a and plane segments b arranged alternately; The second extrusion surface (37) also has a plurality of arc segments a and plane segments b that are alternately arranged; The arc segment a and the plane segment b are both arranged along the axial direction of rotation.
2. The alternating variable cross-section locking structure on a support rod according to claim 1, characterized in that: The first extrusion surface (47) is provided with a first limit position (471), and the second extrusion surface (37) is provided with a second limit position (371).
3. The alternating variable cross-section locking structure on a support rod according to claim 2, characterized in that: The inner bushing (4) is limited on the inner tube (1), and the outer bushing (3) is limited on the outer tube (2); the inner tube (1) and the outer tube (2) can rotate relative to each other and drive the inner bushing (4) and the outer bushing (3) to rotate relative to each other.
4. The alternating variable cross-section locking structure on a support rod according to claim 3, characterized in that: The inner bushing (4) and the inner tube (1) are assembled and limited in position by means of a protrusion (45) and a mounting hole (15); and the outer bushing (3) and the outer tube (2) are limited in position by means of a protrusion (8) and a slot hole (35).
5. The alternating variable cross-section locking structure on a support rod according to claim 4, characterized in that: The outer bushing (3) is at least two symmetrically arranged arc-shaped pieces, with slots (35) formed between adjacent arc-shaped pieces, and the convex strips (8) are arranged on the inner wall of the outer tube (2); the inner bushing (4) is a matching arc-shaped piece arranged in the outer bushing (3).
6. The alternating variable cross-section locking structure on a support rod according to claim 4, characterized in that: The protrusion (45) is arranged on the inner wall of the inner bushing (4), and the mounting hole (15) is arranged on the tube wall of the inner tube (1).
7. The alternating variable cross-section locking structure on a support rod according to claim 1, characterized in that: The cross-sections of the inner bushing (4) and the outer bushing (3) at the extrusion surface structure have a gradually thickening structure, so that a locking force is generated during extrusion.
8. According to the alternating variable cross-section locking structure on a support rod according to any one of claims 1 to 7, the outer bushing (3) is provided with a limiting groove (366), and the inner bushing (4) is provided with a limiting protrusion (466) in the limiting groove (366).
9. The alternating variable cross-section locking structure on a support rod according to claim 8, characterized in that: An anti-drop bushing (6) is also provided between the outer tube (2) and the inner tube (1).
10. The alternating variable cross-section locking structure on a support rod according to claim 9, characterized in that: The anti-drop bushing (6) is positioned in a positioning hole (26) on the tube wall at one end of the outer tube (2) via a protruding block (66) thereon.