WO2018024045A1

WO2018024045A1 - Telescopic tube and camera support provided with telescopic tube

Info

Publication number: WO2018024045A1
Application number: PCT/CN2017/089676
Authority: WO
Inventors: 殷会宾
Original assignee: 中山日高精密工业有限公司
Priority date: 2016-08-04
Filing date: 2017-06-23
Publication date: 2018-02-08
Also published as: CN206000820U

Abstract

A telescopic tube and a camera support provided with the telescopic tube. The telescopic tube comprises an outer tube (10), an inner tube (20), and a locking mechanism. The inner tube (20) penetrates through the outer tube (10) and can slide along the axial direction and the circumferential direction of the outer tube (10). The locking mechanism comprises a first lock-up sheet (30) and a second lock-up sheet (40). The first lock-up sheet (30) is fixed to an end portion of the outer tube (10) or the inner tube (20) by means of a fixing structure, and can rotate along with the outer tube (10) or the inner tube (20). The first lock-up sheet (30) is provided with a first lock-up portion. The second lock-up sheet (40) is fixed to an end portion of the inner tube (20) or the outer tube (10) by means of a fixing structure, and can rotate along with the inner tube (20) or the outer tube (10). The second lock-up sheet (40) is provided with a second lock-up portion. When the outer tube (10) or the inner tube (20) is rotated, the first lock-up portion and the second lock-up portion cooperate to lock the outer tube (10) and the inner tube (20). The first lock-up sheet (30) is of a frame-shaped structure, and a part of the second lock-up sheet (40) or the whole second lock-up sheet (40) is accommodated in an accommodating chamber (32) in the middle of the first lock-up sheet (30). According to the telescopic tube, the first lock-up sheet (30) and the second lock-up sheet (40) can be assembled together first, and then are assembled with the inner tube (20) or the outer tube (10), and accordingly the assembling is convenient, and the production efficiency is high.

Description

Telescopic tube and photography bracket having the same

Technical field

The invention relates to a telescopic tube and a photographic support having the same.

Background technique

Telescopic tubes are widely used in various fields, especially photographic brackets, such as tripod legs, monopod and self-timer. The existing telescopic tube generally comprises an outer tube, an inner tube which is inserted in the outer tube and can slide axially and circumferentially along the outer tube, and a locking structure for locking the outer tube and the inner tube. The locking structure is usually a spiral The locking structure or the toggle locking structure requires a single-segment operation, which is time-consuming and inconvenient to use.

In order to solve the above technical problems, some telescopic tubes are changed by changing the circular tube into two eccentric tubes with a combination of two semi-circular misalignments. When used, the inner tube and the outer tube are angularly different, and the inner tube is squeezed by the outer tube through the friction between the tubes. Locked. However, it has been found in use that the locking structure is metal-to-metal contact due to rotation, is noisy, and is easy to scratch the surface of the pipe.

In order to solve the above technical problem, the applicant of the present invention has applied a novel foot tube telescopic structure (CN204140576U). Referring to FIG. 11, the new leg tube telescopic structure includes a first tube body 1 and is disposed in the first tube body 1. And a second tubular body 2 capable of sliding axially along the first tubular body 1 and a tightening device capable of locking the first tubular body 1 and the second tubular body 2, the tightening device comprising a clamping jacket 33 and a clamping inner sleeve 34. The first locking sleeve 31 and the second locking sleeve 32 are disposed at the end of the second tubular body 2 and are rotatable around the second tubular body 2, and the outer diameter of the clamping outer sleeve 33 is first Corresponding to the inner diameter of the tubular body 1, the clamping inner sleeve 34 is fixedly disposed above the clamping outer sleeve 33, the inner side of the clamping outer sleeve 33 is provided with an inner curved surface structure, and the inner curved surface structure and the outer wall of the second tubular body 2 form a The wedge-shaped slit is gradually reduced, and the outer side of the clamping inner sleeve 34 is an outer curved surface structure corresponding to the wedge-shaped slit. The first locking sleeve 31 is disposed at the inner side of the end of the first tubular body 1, and the outer side of the first locking sleeve 31 is fixed to The first locking sleeve 31 is disposed on the inner wall of the first pipe body 1 with a first curved surface structure, and the second locking sleeve 32 is sleeved and fixed. The outer end portion of two body 2, outside the second locking sleeve 32 is provided with a second arcuate surface structure, the nip is formed between a tapered surface of the first arcuate structure and the outer wall of the second tube 2. Rotating the first tube body 1 or the second tube body 2, the outer curved surface structure of the clamping inner sleeve 34 is wedged into the wedge-shaped slit, and the second curved surface structure 42 can slide into the nip and be clamped, thereby locking Dead first tube 1 and the second pipe body 2, the telescopic adjustment of the new foot pipe telescopic structure is very simple, and the locking structure is simple, reliable and stable.

However, it has been found during use that the structure of the locking structure is complicated, assembly is difficult, and productivity is low.

Summary of the invention

In view of the above state of the art, the technical problem to be solved by the present invention is to provide a telescopic tube having a simple structure and convenient assembly, and a photographing bracket having the telescopic tube.

In order to solve the above technical problem, a telescopic tube provided by the present invention includes:

Outer tube

An inner tube through which the inner tube is threaded and slidable along an axial direction and a circumferential direction of the outer tube;

a locking structure, the locking structure comprising a first locking piece and a second locking piece, the first locking piece being fixed to the end of the outer tube or the inner tube by a fixing structure, and The outer tube or the inner tube rotates, the first locking piece has a first locking portion, and the second locking piece is fixed to the end of the inner tube or the outer tube by a fixing structure, and can be inserted therein The tube or the outer tube rotates, and the second locking piece has a second locking portion. When the outer tube or the inner tube is rotated, the first locking portion is locked with the second locking portion. The outer tube and the inner tube are tightly closed; the first locking piece is a frame-shaped structure, and the second locking piece is partially or completely accommodated in a receiving cavity in the middle of the first locking piece.

In one embodiment, the receiving cavity has a rectangular shape, and the second locking piece has a tile shape that matches the shape of the receiving cavity.

In one embodiment, the first locking portion is an arcuate groove disposed on a frame in the circumferential direction of the receiving cavity, and the arcuate groove is spaced from the receiving cavity along a depth in the circumference. The second locking portion is an arc-shaped end portion of one end of the second locking piece in the circumferential direction, and the curved end portion has a thickness in the circumferential direction from the second locking portion. The center of the film is gradually reduced from near to far.

In one embodiment, the arcuate recess is located on an inner side of the first locking tab.

In one embodiment, the width of the frame of the first locking piece where the arcuate groove is located is greater than the width of the frame of the side opposite to the arcuate groove.

In one embodiment, two pieces of the first locking piece and two pieces of the second locking piece are included, and two pieces of the first locking piece are symmetrically disposed on both sides of the end of the inner tube , two pieces of the second locking piece They are partially or completely accommodated in the two receiving chambers of the first locking piece, respectively.

In one embodiment, the fixing structure of the first locking piece fixed on the outer tube comprises two circumferentially spaced first limiting protrusions extending in the axial direction, the first lock The tab is caught between the two first limiting protrusions.

In one embodiment, one end of the first locking piece has a third limiting protrusion extending inwardly, and the third limiting protrusion is fastened at the nozzle of the inner tube.

In one embodiment, the fixing structure of the second locking piece fixed on the inner tube comprises a second limiting protrusion disposed on the inner side of the second locking piece and disposed therein a first limiting recess on the tube that cooperates with the second limiting protrusion, and the second limiting protrusion is engaged in the first limiting recess.

In one embodiment, the second limiting protrusion and the first limiting recess are triangular.

In one embodiment, the first locking piece and the second locking piece are made of plastic of different materials.

In one embodiment, the telescopic tube further includes a sleeve, the outer surface of the sleeve is provided with a fourth limiting protrusion, and the outer tube is provided with the fourth limiting protrusion The second limiting recess is engaged, and the fourth limiting convex portion is engaged in the second limiting recess.

In one embodiment, the fourth limiting protrusion is semi-circular.

A photographing bracket provided by the present invention includes the above-mentioned telescopic tube.

The telescopic tube provided by the present invention and the photographing support having the telescopic tube have a frame-shaped structure, and the second locking piece is partially or completely accommodated in the receiving cavity in the middle of the first locking piece, so that the first The first locking piece and the second locking piece are assembled together and then assembled with the inner tube or the outer tube, which is convenient to assemble and has high production efficiency.

Advantageous effects of the additional features of the present invention will be described in the Detailed Description of the Detailed Description.

DRAWINGS

1 is an assembled view of a telescopic tube in an embodiment of the present invention;

2 is a partially exploded perspective view of a telescopic tube according to an embodiment of the present invention;

3 is a schematic exploded view of a telescopic tube according to an embodiment of the present invention;

4 and FIG. 5 are schematic perspective structural views of a first locking piece of a telescopic tube according to an embodiment of the present invention;

6 and FIG. 7 are schematic perspective structural views of a second locking piece of a telescopic tube according to an embodiment of the present invention;

8 and FIG. 9 are schematic cross-sectional structural views of a telescopic tube according to an embodiment of the present invention, wherein FIG. 8 is a state when loosened, and FIG. 9 is a state when locked;

10 is a schematic structural view of a sleeve of a telescopic tube according to an embodiment of the present invention;

11 is a schematic structural view of a conventional telescopic tube.

DESCRIPTION OF REFERENCE NUMERALS: 10, outer tube; 12, first limiting convex portion; 14, second limiting concave portion; 20, inner tube; 22, first limiting concave portion; 30, first locking piece; The receiving cavity; 34, the curved groove; 36, the third limiting convex portion; 40, the second locking piece; 42, the curved end portion; 44, the second limiting convex portion; 50, the sleeve; The fourth limit convex portion.

detailed description

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are intended to be illustrative of the invention and are not to be construed as limiting.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the term "center" or the like is based on the orientation or positional relationship shown in the drawings, and is merely for the convenience of describing the present invention and simplifying the description, rather than indicating or It is to be understood that the device or elements referred to have a particular orientation, are constructed and operated in a particular orientation and are therefore not to be construed as limiting. Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may include one or more of the features either explicitly or implicitly. In the description of the present invention, "a plurality" means two or more unless otherwise stated.

In the description of the present invention, it should be noted that the terms "installation", "connected", and "connected" are to be understood broadly, and may be fixed or detachable, for example, unless otherwise explicitly defined and defined. Connected, or connected in one piece; it can be a mechanical connection or an electrical connection; it can be directly connected, It can also be connected indirectly through an intermediate medium, which can be the internal communication between two components. The specific meaning of the above terms in the present invention can be understood in a specific case by those skilled in the art.

In the following description, for the sake of convenience, an "outer tube" and an "inner tube" are taken as an example, and the position between the "outer tube" and the "inner tube" is a relative position, that is, "outside It is also possible that the tube is placed inside another tube and becomes an "inner tube". The "inner tube" may also be placed outside the other tube to become an "outer tube".

As shown in FIG. 1-3, the telescopic tube in one embodiment of the present invention includes an outer tube 10, an inner tube 20, and a locking structure. The outer tube 10 and the inner tube 20 are made of a metal material (such as aluminum), and the inner tube is formed. The inner diameter of the inner tube 20 is smaller than the outer diameter of the outer tube 10, and the inner tube 20 is bored in the outer tube 10 and is slidable in the axial direction and the circumferential direction of the outer tube 10. The locking structure is used to lock the inner tube 20 and the outer tube 10, and the locking structure includes a first locking piece 30 and a second locking piece 40.

As shown in FIGS. 4-5, the first locking piece 30 has a frame-shaped structure having a central receiving cavity 32 and a first locking portion on one side of the receiving cavity 32. In a preferred embodiment, the first locking portion is an arcuate groove 34 disposed on a frame in the circumferential direction of the receiving cavity 32, and the arcuate groove 34 is at a depth in the circumferential direction. The accommodating chamber 32 is gradually reduced from near to far. The first locking piece 30 is fixed in the end of the outer tube 10 by a fixing structure and is rotatable with the outer tube 10.

As shown in FIG. 6-7, the second locking piece 40 is partially or completely accommodated in the accommodating cavity 32 of the first locking piece 30, and the second locking piece 40 is provided with a second locking portion. In a preferred embodiment, the second locking portion is an arc-shaped end portion 42 of one end of the second locking piece 40 in the circumferential direction, and the thickness of the curved end portion 42 in the circumferential direction is away from the first The center of the two locking pieces 40 is gradually reduced from near to far. The second locking piece 40 is fixed to the outer side of the end of the inner tube 20 by a fixing structure and is rotatable with the inner tube 20.

As shown in FIG. 8, in the loosened state, only a small portion of the arcuate end portion 42 of the second locking piece 40 is inserted into the arcuate groove 34 of the first locking piece 30, the first locking piece 30 and the first The thickness of the overlapping portion of the two locking pieces 40 is smaller than the distance between the inner tube 20 and the outer tube 10, and the length of the inner tube 20 and the outer tube 10 can be elongated or shortened at this time. When the length is shortened or shortened to the required length, the inner tube 20 or the outer tube 10 is rotated, and the curved end portion 42 of the second locking piece 40 and the arcuate groove 34 of the first locking piece 30 are relatively moved. When the thickness of the overlapping portion of the first locking piece 30 and the second locking piece 40 is greater than the distance between the inner tube 20 and the outer tube 10, the first locking portion, the second locking portion, the inner wall of the outer tube 10, and The friction between the outer walls of the inner tube 20 is locked Tube 20 and outer tube 10 (see Figure 9).

In the telescopic tube of the embodiment, the second locking piece 40 is partially or completely accommodated in the accommodating cavity 32 of the first locking piece 30, so that the first locking piece 30 and the second locking can be first assembled during assembly. After the sheets 40 are assembled together, they are assembled with the inner tube 20 or the outer tube 10, which is convenient to assemble and has high production efficiency. Moreover, since the second locking piece 40 is received in the first locking piece 30, and the curved end portion 42 of the second locking piece 40 protrudes into the arcuate groove 34 of the first locking piece 30, To the guiding action, the first locking piece 30 and the second locking piece 40 are rotated smoothly.

In one embodiment, the receiving cavity 32 on the first locking piece 30 has a rectangular shape, and the second locking piece 40 has a tile shape, such that the shape of the second locking piece 40 and the shape of the receiving cavity 32. Matching, the first locking piece 30 and the second locking piece 40 are rotated smoothly.

In one embodiment, the width of the frame of the first locking piece 30 where the arcuate groove 34 is located is greater than the width of the frame on the side opposite to the curved groove 34, such that the curved groove 34 The contact area with the curved end portion 42 is large, and the locking effect is good.

In one of the embodiments, the arcuate groove 34 is located on the inner side of the first locking piece 30, so that the second locking piece 40 can be prevented from slipping during the rotation.

In one embodiment, two pieces of the first locking piece 30 and two pieces of the second locking piece 40 are included, two pieces of the first locking piece 30 are symmetrically disposed, and two pieces of the second locking Part or all of the stop pieces 40 are respectively accommodated in the accommodating cavities 32 of the two first locking pieces 30, which makes the locking effect better.

In one embodiment, the fixing structure of the first locking piece 30 fixed on the outer tube 10 includes two axially extending first limiting protrusions 13 arranged at intervals in the circumferential direction, first The limiting protrusions 13 extend along the axial direction of the outer tube 10, and the two first locking pieces 30 are respectively located between the two first limiting protrusions 13 and pass through the two first limiting protrusions. The portion 13 limits the circumferential direction of the first locking piece 30. In order to axially limit the first locking piece 30, one end of the first locking piece 30 has a third limiting protrusion 36 extending inwardly, and the third limiting protrusion 36 is fastened to the tube of the inner tube 20. At the mouth.

In one embodiment, the fixing structure of the second locking piece 40 fixed to the inner tube 20 includes a second limiting protrusion 44 and a setting disposed on the inner side of the second locking piece 40. a first limiting recess 22 on the inner tube 20 that cooperates with the second limiting protrusion 44. In order to prevent assembly fashion In contrast, the second limiting protrusion 44 and the first limiting recess 22 have an asymmetrical shape, which is a triangle in this embodiment.

In one embodiment, the first locking piece 30 and the second locking piece 40 are made of plastic of different materials, such that the first locking piece 30 and the second locking piece The wear between the 40 is small and the service life can be extended.

In one embodiment, the telescopic tube further includes a sleeve 50 fixed to an end of the outer tube 10 to cooperate with the first locking piece 30 and the second locking piece 40 to prevent The inner tube 20 is slipped. As shown in FIG. 10, a fourth limiting protrusion 52 is disposed on the outer side surface of the sleeve 50, and the outer tube 10 is provided with a second limiting recess corresponding to the fourth limiting protrusion 52. 14. In order to make the spacing between the second limiting recess 14 and the nozzle of the outer tube 10 not too small, affecting the end strength of the outer tube 10, the fourth limiting convex portion 52 is semi-circular, and fourth The thickness of the limiting convex portion 52 gradually increases.

In another embodiment of the invention, a photographic support is provided that includes the telescoping tube described above. The photography stand can be a tripod, a monopod or a selfie stick.

The above-mentioned embodiments are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the invention. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention.

Claims

A telescopic tube comprising:

Outer tube (10);

An inner tube (20), the inner tube (20) is disposed in the outer tube (10) and slidable along an axial direction and a circumferential direction of the outer tube (10);

a locking structure, the locking structure comprising a first locking piece (30) and a second locking piece (40), the first locking piece (30) being fixed to the outer tube (10) by a fixing structure Or the end of the inner tube (20), and can rotate with the outer tube (10) or the inner tube (20), the first locking piece (30) has a first locking portion, the second The locking piece (40) is fixed to the end of the inner tube (20) or the outer tube (10) by a fixing structure, and is rotatable with the inner tube (20) or the outer tube (10), the second The locking piece (40) has a second locking portion, and when the outer tube (10) or the inner tube (20) is rotated, the first locking portion is locked with the second locking portion Tightening the outer tube (10) and the inner tube (20);

The first locking piece (30) is a frame-shaped structure, and the second locking piece (40) is partially or completely accommodated in the receiving cavity (32) in the middle of the first locking piece (30).
The telescopic tube according to claim 1, wherein said receiving cavity (32) has a rectangular shape, and said second locking piece (40) is in the shape of a tile matching the shape of said receiving cavity (32).
The telescopic tube according to claim 1, wherein the first locking portion is an arcuate groove (34) disposed on a frame in a circumferential direction of the receiving cavity (32), the arc shape The groove (34) is gradually narrowed from the receiving cavity (32) by a depth along the circumference, and the second locking portion is an arc of one end of the second locking piece (40) in the circumferential direction. The end portion (42) has a thickness in the circumferential direction that gradually decreases from the center to the center of the second locking piece (40).
A telescoping tube according to claim 3, wherein said arcuate recess (34) is located on an inner side of said first locking tab (30).
The telescopic tube according to claim 3, wherein the width of the frame of the first locking piece (30) where the arcuate groove (34) is located is larger than that of the curved groove (34) The width of the side border.
The telescopic tube according to claim 1, comprising two pieces of said first locking piece (30) and two pieces of said second locking piece (40), and two pieces of said first locking piece (30) symmetrically placed at Two sides of the end portions of the inner tube (20), two of the second locking pieces (40) are partially or completely accommodated in the receiving chambers of the two first locking pieces (30), respectively. )in.
A telescopic tube according to any one of claims 1 to 6, wherein the fixing structure of the first locking piece (30) fixed to the outer tube (10) comprises two circumferentially spaced Arranged axially extending first limiting protrusions (13), the first locking piece (30) being caught between the two first limiting protrusions (13).
The telescopic tube according to claim 7, wherein one end of the first locking piece (30) has a third limiting protrusion (36) extending inwardly, and the third limiting protrusion (36) ) buckled at the nozzle of the inner tube (20).
The telescopic tube according to any one of claims 1 to 6, wherein the fixing structure of the second locking piece (40) fixed to the inner tube (20) comprises a second a second limiting protrusion (44) on the inner side of the locking piece (40) and a first limiting recess disposed on the inner tube (20) and cooperating with the second limiting protrusion (44) (22), the second limiting protrusion (44) is engaged in the first limiting recess (22).
The telescopic tube according to claim 9, wherein the second limiting protrusion (44) and the first limiting recess (22) are triangular.
The telescopic tube according to any one of claims 1 to 6, characterized in that the first locking piece (30) and the second locking piece (40) are made of plastic of different materials.
The telescopic tube according to claim 1, further comprising a sleeve (50), the outer surface of the sleeve (50) is provided with a fourth limiting protrusion (52), the outer tube ( The end portion of 10) is provided with a second limiting recess (14) that cooperates with the fourth limiting convex portion (52), and the fourth limiting convex portion (52) is engaged with the second limiting position. Inside the recess (14).
The telescopic tube according to claim 12, wherein the fourth limiting protrusion (52) is semicircular.
A photographic support characterized by comprising the telescopic tube according to any one of claims 1 to 13.