CN212297174U

CN212297174U - Telescopic rod

Info

Publication number: CN212297174U
Application number: CN202021065250.0U
Authority: CN
Inventors: 周雨
Original assignee: Zhongshan Yuyu Technology Co ltd
Current assignee: Zhongshan Yuyu Technology Co ltd
Priority date: 2020-06-10
Filing date: 2020-06-10
Publication date: 2021-01-05
Anticipated expiration: 2030-06-10

Abstract

The utility model discloses a telescopic link, include: a first pipe member; the second pipe fitting is inserted into the first pipe fitting to form a complete pipe structure, and the second pipe fitting can slide along the axial direction of the first pipe fitting; the sliding stopping sheet is arranged at the rear end of the second pipe fitting inserted into the first pipe fitting and is used for forming damping force for limiting the relative sliding of the first pipe fitting and the second pipe fitting; the slip-preventing piece comprises a main body matched with the outer wall surface of the second pipe fitting and a boss arranged on the main body and protruding towards the side of the first pipe fitting, and the boss comprises at least one first section extending along the circumferential direction and at least one second section extending along the axial direction. The top surface of the boss is in surface-to-surface contact with the inner wall surface of the first pipe fitting, so that the contact area of the telescopic rod is large; moreover, the boss comprises at least one first section and at least one second section, so that the contact area is further increased, the damping force between the first pipe fitting and the second pipe fitting is uniform, and the stretching and shrinking handfeel of the telescopic rod is uniform and smooth.

Description

Telescopic rod

Technical Field

The utility model relates to a flexible technical field especially relates to a telescopic link.

Background

The telescopic link extensively applies to each field, especially photographic goods field and electrical apparatus technical field, like the foot pipe of tripod, unipod, from rapping bar, flexible light filling lamp, live support, cell phone stand, folding fan etc.. The existing telescopic rod generally comprises a plurality of sub-tubes with gradually changing diameters from large to small, which are nested with each other, and a slip-preventing sheet for generating damping force between the two sub-tubes is arranged between the two adjacent sub-tubes. The earliest anti-slip sheet is made of copper, so that the anti-slip sheet is too strong in hardness, inflexible in structure, bad in hand feeling when the telescopic rod is stretched, large in friction sound, and inconvenient to process a copper reed. In order to solve the technical problem, chinese utility model patent (publication No. CN205858883U) discloses a slip-stopping sheet, which is made of plastic, and each of the two ends of the slip-stopping sheet in the axial direction is provided with an arc-shaped drum surface, and the arc-shaped drum surfaces are abutted against the inner wall surface of the sub-pipe with a larger diameter, so as to position the two adjacent sub-pipes. The arc drum surface of the anti-slip sheet is in line-surface contact with the inner wall surface of the sub-pipe, and the contact surface is small. In order to increase the contact surface, the clearance between two adjacent sub-pipes is reduced, and the anti-slip sheet is extruded by the two sub-pipes to deform the arc drum surface, so that the anti-slip sheet has strict requirements on the dimensional error of the sub-pipes and high processing requirements; on the other hand, because the extrusion force born by the slip-resistant sheet is large, after the slip-resistant sheet is used for a period of time, the elastic force attenuation of the slip-resistant sheet is large, so that the damping force between the sub-pipes is reduced, and the positioning effect is poor.

Disclosure of Invention

To the above-mentioned prior art current situation, the utility model aims to solve the technical problem that a damping force is even and the telescopic link that decay rate is little is provided.

In order to solve the technical problem, the utility model provides a telescopic link, include: a first pipe member; a second pipe member inserted into the first pipe member to form a pipe set structure, the second pipe member being slidable in an axial direction of the first pipe member; the sliding stopping sheet is arranged at the rear end of the second pipe fitting inserted into the first pipe fitting and is used for forming damping force for limiting the relative sliding of the first pipe fitting and the second pipe fitting; the sliding-stopping piece comprises a main body matched with the outer wall surface of the second pipe fitting and a boss arranged on the main body and protruding towards the side of the first pipe fitting, and the boss comprises at least one first section extending along the circumferential direction of the second pipe fitting and at least one second section extending along the axial direction of the second pipe fitting.

The top surface of the boss is in surface-to-surface contact with the inner wall surface of the first pipe fitting, so that the contact area of the telescopic rod is large; moreover, the boss comprises at least one first section extending along the circumferential direction of the second pipe fitting and at least one second section extending along the axial direction of the second pipe fitting, so that the contact area between the top surface of the boss and the inner wall surface of the first pipe fitting is further increased, the damping force between the first pipe fitting and the second pipe fitting is uniform, and the stretching and shrinking hand feeling of the telescopic rod is uniform and smooth.

Preferably, the boss comprises one first section and two second sections, and one end of each of the two second sections is connected with two ends of one first section to form a U shape.

Preferably, the opening of the "U" shape is directed toward the front end side of the second pipe member.

Preferably, the boss comprises two first sections and two second sections, and two ends of the two second sections are respectively connected with two ends of the two first sections to form a square.

Preferably, the top surface of the boss is an arc surface matched with the inner wall surface of the first pipe fitting.

Preferably, the distance from the boss to the rear end face of the main body is smaller than the distance from the boss to the front end face of the main body.

Preferably, a guide slope is provided between a top surface of a front end of the boss and an outer surface of a front end of the main body.

Preferably, a space is left between two ends of the boss in the circumferential direction of the second pipe and two sides of the main body in the circumferential direction of the second pipe.

Preferably, a positioning structure is arranged between the slip stopper and the rear end of the second pipe fitting, the positioning structure comprises a positioning column arranged on the inner surface of the main body and a positioning hole arranged on the rear end of the second pipe fitting and matched with the positioning column, and the positioning column avoids the position of the boss.

Preferably, the front end of the main body is provided with a limit step protruding toward the second pipe fitting side.

The advantageous effects of the additional features of the present invention will be explained in the detailed description of the preferred embodiments of the present description.

Drawings

Fig. 1 is a perspective view of a telescopic rod in a first embodiment of the present invention;

FIG. 2 is an exploded view of the telescoping pole shown in FIG. 1;

FIG. 3 is a front view of the anti-slip sheet of the telescopic rod shown in FIG. 1;

fig. 4 and 5 are perspective views of the sliding stop plate of the telescopic rod shown in fig. 1, wherein fig. 4 shows a state seen from outside to inside, and fig. 5 shows a state seen from inside to outside;

fig. 6 is a front view of a slip-preventing piece of a telescopic rod according to a second embodiment of the present invention;

fig. 7 and 8 are perspective views of the locking piece shown in fig. 6, in which fig. 7 shows a state seen from the outside to the inside, and fig. 8 shows a state seen from the inside to the outside.

Description of reference numerals: 10. a first pipe member; 11. a front end of a first tube; 12. a rear end of the first tube; 13. positioning holes; 20. a second pipe member; 21. a front end of the second tube; 22. a rear end of the second tube; 23. positioning holes; 30. a damping fin; 31. a main body; 32. a boss; 321. a first stage; 322. a second stage; 323. a guide slope; 33. a positioning column; 34. a limiting step; 40. a limiting sleeve; 41. and a positioning projection.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the features in the following embodiments and examples may be combined with each other without conflict.

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 only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the following description, for the purpose of convenience, a "first pipe 10" and a "second pipe 20" are taken as an example, but it is not understood that the telescopic rod in the embodiment only includes two pipes, and the telescopic rod may be provided with more than two pipes according to actual needs. The position between the "first pipe member 10" and the "second pipe member 20" is a relative position, that is, the "first pipe member 10" may be inserted into another pipe to become the "second pipe member 20", and the "second pipe member 20" may be sleeved outside another pipe to become the "first pipe member 10".

As shown in fig. 1-2, the telescopic tube of the first embodiment of the present invention includes a first tube 10, a second tube 20 and a non-slip sheet 30, wherein the first tube 10 and the second tube 20 are made of metal (e.g. aluminum) or other rigid materials, the inner diameter of the second tube 20 is smaller than the outer diameter of the first tube 10, and the second tube 20 is inserted into the first tube 10 and can slide along the axial direction of the first tube 10. For convenience of description, one end of the first pipe 10 is defined as a rear end 12 and the other end is defined as a front end 11. The second pipe element 20 is inserted into the first pipe element 10 with a rear end 22 at one end and a front end 21 at the other end.

A stop tab 30 is provided at the rear end 22 of the second tubular member 20 for providing a damping force for the relative sliding movement of the first and second

tubular members

10, 20. Preferably, the anti-slip sheet 30 is two sheets, and the two anti-slip sheets 30 are oppositely installed at both sides of the rear end 22 of the second pipe 20. The anti-slip sheet 30 is made of plastic or other elastic material.

As shown in fig. 3 to 5, the anti-slip sheet 30 includes a main body 31 matching with the outer wall surface of the second pipe member 20 and a boss 32 provided on the main body 31 and protruding toward the first pipe member 10 side, and the boss 32 includes at least one first section 321 extending in the circumferential direction of the second pipe member 20 and at least one second section 322 extending in the axial direction of the second pipe member 20. The top surface of boss 32 offsets with the internal face of first pipe fitting 10, forms the damping between the top surface of boss 32 and the internal face of first pipe fitting 10 to fix the optional position in first pipe fitting 10 with second pipe fitting 20, thereby conveniently adjust the length of telescopic link. The anti-slip sheet 30 of the present invention has a large contact area because the top surface of the boss 32 is in close contact with the inner wall surface of the first pipe 10; moreover, the boss 32 comprises at least one first section 321 extending along the circumferential direction of the second pipe fitting 20 and at least one second section 322 extending along the axial direction of the second pipe fitting 20, so that the contact area between the top surface of the boss 32 and the inner wall surface of the first pipe fitting 10 is further increased, the damping force between the first pipe fitting 10 and the second pipe fitting 20 is uniform, the stretching and shrinking hand feeling of the telescopic rod is uniform and smooth, and the consumer experience is good.

Preferably, the boss 32 includes a first segment 321 and two second segments 322, and one end of each of the two second segments 322 is connected to both ends of one of the first segments 321 to form a "U" shape. The "U" shaped boss 32 has the following advantages: since the free ends (lower ends in fig. 3) of the two second segments 322 are not connected to each other, the external force required for the free ends of the two second segments 322 to be crushed with respect to the other ends is small, and when the anti-slip sheet 30 and the second pipe 20 are installed together in the first pipe 10, the insertion is easy and the installation is convenient. When assembled, the front end 21 of the second pipe member 20 is inserted from the rear end 12 of the first pipe member 10, and therefore, the opening of the "U" shape faces the front end 21 side of the second pipe member 20.

Preferably, the distance L1 from the boss 32 to the rear end face of the main body 31 is smaller than the distance L2 from the boss 32 to the front end face of the main body 31 (see fig. 3), so that the boss 32 is disposed near the rear end of the slide stopper 30, and the main body 31 in front of the boss 32 can form a guide portion to facilitate the fitting into the first pipe 10 when the slide stopper 30 and the second pipe 20 are fitted into the first pipe 10 together.

Preferably, a guiding inclined plane 323 is arranged between the top surface of the front end of the boss 32 and the outer surface of the front end of the main body 31, and the guiding inclined plane 323 can play a guiding role, so that the first pipe fitting 10 is convenient to install during assembly.

Preferably, a distance (shown in fig. 4 and 5) is left between two ends of the boss 32 in the circumferential direction of the second pipe 20 and two ends of the main body 31 in the circumferential direction of the second pipe 20, so that two ends of the boss 32 in the circumferential direction of the second pipe 20 do not extend to two end faces of the main body 31 in the circumferential direction of the second pipe 20, so that two ends of the main body 31 in the circumferential direction of the second pipe 20 are completely attached to the outer wall surface of the second pipe 20, and thus, the elastic attenuation of the sliding-stopping sheet 30 is slow, which is beneficial to prolonging the service life of the product.

Preferably, a positioning structure is disposed between the anti-slip sheet 30 and the rear end of the second tube 20, the positioning structure includes a positioning post 33 disposed on the inner surface of the main body 31 and a positioning hole 23 disposed on the rear end of the second tube 20 and engaged with the positioning post 33, and the positioning post 33 avoids the position of the boss 32. The anti-slip sheet 30 is limited by the positioning hole 23 and the positioning post 33. In order to axially restrain the anti-slip sheet 30, the front end of the main body 31 is provided with a restraining step 34 protruding toward the second pipe member 20 side.

In one embodiment, the telescopic tube further comprises a limiting sleeve 40, the limiting sleeve 40 is fixed at the front end of the first tube 10, and the limiting sleeve 40 is matched with the anti-slip sheet 30 to prevent the second tube 20 from slipping off. As shown in fig. 2, a positioning protrusion 41 is disposed on an outer side surface of the position-limiting sleeve 40, and a positioning hole 13 engaged with the positioning protrusion 41 is disposed on the first pipe 10.

Fig. 6-8 are schematic structural views of the anti-slip sheet 30 according to the second embodiment of the present invention, the structure of the anti-slip sheet 30 in this embodiment is substantially the same as that of the first embodiment, except that: the boss 32 in this embodiment includes two first segments 321 and two second segments 322, and one end of each of the two second segments 322 is connected to two ends of each of the two first segments 321 to form a "square". The "U" shape has a larger contact area with the inner wall surface of the first pipe 10 than the "U" shape boss 32, and therefore, the damping force is more uniform and the stability is more excellent.

The boss 32 of the anti-slip sheet 30 of the present invention may be in the shape of "T" or "L" in addition to the "U" shape of the first embodiment and the "U" shape of the second embodiment.

The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. A telescoping pole, comprising:

a first pipe member;

a second pipe member inserted into the first pipe member to form a pipe set structure, the second pipe member being slidable in an axial direction of the first pipe member; and

the sliding stopping sheet is arranged at the rear end of the second pipe fitting inserted into the first pipe fitting and is used for forming damping force for limiting the relative sliding of the first pipe fitting and the second pipe fitting;

the anti-slip piece is characterized by comprising a main body matched with the outer wall surface of the second pipe fitting and a boss arranged on the main body and protruding towards the side of the first pipe fitting, wherein the boss comprises at least one first section extending along the circumferential direction of the second pipe fitting and at least one second section extending along the axial direction of the second pipe fitting.

2. The telescopic rod of claim 1, wherein the boss comprises one first section and two second sections, and one end of each of the two second sections is connected to both ends of one first section to form a "U" shape.

3. The telescopic rod according to claim 2, characterized in that the opening of the "U" shape is directed towards the front end side of the second tube.

4. The telescopic rod according to claim 1, wherein the boss comprises two first sections and two second sections, and two ends of the two second sections are respectively connected with two ends of the two first sections to form a square shape.

5. The telescopic rod according to claim 2 or 4, wherein the top surface of the boss is an arc surface matched with the inner wall surface of the first pipe fitting.

6. The extension pole of claim 2 or 4 wherein the distance from the boss to the rear end face of the main body is less than the distance from the boss to the front end face of the main body.

7. The telescopic rod according to claim 2 or 4, wherein a guide slope is provided between the top surface of the front end of the boss and the outer surface of the front end of the main body.

8. The telescopic rod according to claim 2 or 4, wherein a space is left between both ends of the boss in the circumferential direction of the second pipe and both sides of the main body in the circumferential direction of the second pipe.

9. The telescopic rod according to claim 2 or 4, wherein a positioning structure is arranged between the sliding stopper and the rear end of the second pipe, the positioning structure comprises a positioning column arranged on the inner surface of the main body and a positioning hole arranged on the rear end of the second pipe and matched with the positioning column, and the positioning column is arranged to avoid the boss.

10. The telescopic rod according to claim 2 or 4, wherein the front end of the main body is provided with a limit step protruding toward the second pipe side.