CN210660900U

CN210660900U - Telescopic rod

Info

Publication number: CN210660900U
Application number: CN201921272182.2U
Authority: CN
Inventors: 单景华; 彭易兵
Original assignee: Winners Sun Plastic and Electronic Shenzhen Co Ltd
Current assignee: Winners Sun Plastic and Electronic Shenzhen Co Ltd
Priority date: 2019-08-07
Filing date: 2019-08-07
Publication date: 2020-06-02
Anticipated expiration: 2029-08-07

Abstract

The utility model relates to a telescopic link, including two at least sections coaxial big telescopic joints and the little telescopic joint that cup joints, the rear end of little telescopic joint is fixed with the setting element, the setting element follows little telescopic joint slides, its inner wall with little telescopic joint laminating, its outer wall support leans on the inner wall of big telescopic joint, it is protruding to be equipped with first card on the setting element, set up on the big telescopic joint with the protruding complex first locating hole of first card. When the first clamping protrusion is clamped with the first positioning hole, the positioning piece and the large telescopic joint are positioned mutually, and the positioning piece slides along with the small telescopic joint, so that the small telescopic joint and the large telescopic joint are positioned mutually, and the telescopic rod can be effectively prevented from retracting inwards.

Description

Telescopic rod

Technical Field

The utility model belongs to the technical field of the telescopic link technique and specifically relates to a telescopic link.

Background

The telescopic link has scalable, accomodate convenient, convenient to carry's characteristics, and the wide application is in each field, and is common to have from rapping bar, flexible clothes-horse, flexible umbrella stick, fishing rod, mop etc.. At present, from rapping bar has been extensively used for the cell-phone from rapping by people, and it can stretch out and draw back wantonly at certain length within range, and the user only needs to fix cell-phone or camera on fixture, can carry out from rapping.

The telescopic link that has damping locate function among the prior art has a relatively poor positioning effect, inwards retracts easily under great exogenic action to the telescopic link that makes this kind of structure has certain limitation when using. If the telescopic rod with the structure is used on the telescopic support leg on the tripod, when a heavier object is borne on the tripod, the telescopic support leg with the structure is easy to retract inwards, so that the telescopic support leg cannot well play a role in supporting.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in that, a telescopic link is provided, it is relatively poor to aim at solving current telescopic link location ability, receives the problem that external force inwards contracts back easily.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a telescopic link, including two at least sections coaxial big telescopic joint and the little telescopic joint that cup joints, the rear end of little telescopic joint is fixed with the setting element, the setting element follows little telescopic joint slides, its inner wall with little telescopic joint laminating, its outer wall support lean on the inner wall of big telescopic joint, be equipped with first card protruding on the setting element, set up on the big telescopic joint with first protruding complex first locating hole of card.

Furthermore, a deformable elastic part is arranged on the positioning piece, and the first clamping protrusion is arranged on the elastic part.

Furthermore, two strip-shaped holes are formed in the positioning piece at intervals, and the elastic part is formed between the two strip-shaped holes.

Further, the elastic part is U-shaped.

Furthermore, an avoidance groove is formed in the position, corresponding to the elastic part, of the small telescopic joint.

Furthermore, the first clamping protrusion is provided with an inclined surface which is convenient to slip from the first positioning hole.

Furthermore, the orientation of the inclined plane is perpendicular to the axial direction of the small telescopic joint, the small telescopic joint is rotated to drive the positioning piece to rotate, and the first clamping protrusion slips from the first positioning hole under the assistance of the inclined plane.

Furthermore, the inner wall of the large telescopic joint is provided with a limiting part for limiting the rotation angle of the positioning piece.

Furthermore, two limiting parts are symmetrically arranged on the inner wall of the large telescopic joint; the locating piece has two, and these two locating pieces symmetry set up in on the outer wall of little telescopic joint to be separated by two spacing portions.

Furthermore, the first clamping protrusion is provided with a curved surface which is convenient to slip from the first positioning hole.

Furthermore, the inner wall of the positioning piece is provided with a second clamping protrusion, and the small telescopic joint is provided with a second positioning hole matched with the second clamping protrusion.

Furthermore, a limiting sleeve used for blocking the positioning piece with each other is fixed on the inner wall of the front end of the large telescopic joint.

Furthermore, the positioning piece comprises a base surface attached to the outer wall of the small telescopic joint and an arc-shaped drum surface protruding from the base surface, and the arc-shaped drum surface abuts against the inner wall of the large telescopic joint.

Furthermore, the positioning piece comprises two arc-shaped drum surfaces and a base surface, the base surface is located in the middle of the positioning piece, and the arc-shaped drum surfaces are located at two ends of the positioning piece.

Furthermore, two ends of the positioning piece are provided with narrowing parts.

Compared with the prior art, the utility model provides a pair of telescopic link, when first card is protruding with first locating hole block is fashionable, mutual location is realized with big telescopic joint to the setting element, again because the setting element slides along with little telescopic joint, so mutual location is realized with big telescopic joint to little telescopic joint, can effectually prevent the inside withdrawal of telescopic link.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 is a schematic structural view of a telescopic rod provided by the present invention;

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

FIG. 3 is a partially exploded view of the telescoping pole of FIG. 1;

FIG. 4 is a cross-sectional view of the extension pole of FIG. 1;

fig. 5 is an enlarged schematic view of the positioning member in fig. 2.

Detailed Description

The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

As shown in fig. 1 and 2, the utility model provides a telescopic rod, which comprises at least two sections of large telescopic joints 10 and small telescopic joints 20 which are coaxially sleeved, and a positioning piece 30 is fixed at the rear end of the small telescopic joint 20. The positioning member 30 slides along with the small telescopic joint 20, the inner wall of the positioning member is attached to the small telescopic joint 20, and the outer wall of the positioning member abuts against the inner wall of the large telescopic joint 10. The positioning member 30 is provided with a first protrusion 31, and the large telescopic joint 10 is provided with a first positioning hole 11 matched with the first protrusion 31.

When the first locking protrusion 31 is engaged with the first positioning hole 11, the positioning member 30 and the large telescopic joint 10 are positioned with each other, and the positioning member 30 slides along with the small telescopic joint 20, so that the small telescopic joint 20 and the large telescopic joint 10 are positioned with each other, and the telescopic rod can be effectively prevented from retracting inwards. When the telescopic rod needs to retract inwards, the first clamping protrusion 31 is separated from the first positioning hole 11 through external force, and then the telescopic rod can stretch normally.

In order to make the retraction of the telescopic rod smoother, the positioning member 30 is provided with a deformable elastic portion 32, and the first locking protrusion 31 is disposed on the elastic portion 32. After the first clamping protrusion 31 is separated from the first positioning hole 11, the elastic part 32 deforms inwards, so that the friction force between the first clamping protrusion 31 and the inner wall of the large telescopic joint 10 is reduced, and the contraction is facilitated.

In the embodiment, two strip-shaped holes 33 are formed at intervals on the positioning member 30, and the elastic portion 32 is formed between the two strip-shaped holes 33. The small telescopic joint 20 is provided with an avoiding groove 21 corresponding to the position of the elastic part 32. The elastic part 32 deforms inwards and is accommodated in the avoiding groove 21, so that the deformation range of the elastic part 32 can be increased, and the telescopic rod can retract more smoothly.

In other embodiments, the positioning member 30 is provided with three strip-shaped holes at intervals, and the three strip-shaped holes are communicated with each other to form a U-shaped elastic portion 32.

Referring to fig. 2, the inner wall of the positioning member 30 is provided with a second locking protrusion 34, and the small telescopic joint 20 is provided with a second positioning hole 22 matching with the second locking protrusion 34. During assembly, the second clamping protrusion 34 is clamped with the second positioning hole 22, so that the positioning element 30 and the small telescopic joint 20 are positioned, and the positioning element 30 slides along with the small telescopic joint 20. Of course, the fixing method between the positioning member 30 and the small telescopic joint 20 may be various fixing methods such as screw locking and adhesion.

Further, a stopper 40 for blocking the stopper 30 from each other is fixed to an inner wall of the front end of the large telescopic joint 10. A limiting sleeve 40 is fixed on the inner wall surface of the front end of the large telescopic joint 10, and the limiting sleeve 40 is used for blocking the positioning piece 30 mutually to prevent the small telescopic joint 20 from slipping off the large telescopic joint 10. In this embodiment, the position-limiting sleeve 40 is fixed to the large telescopic joint 10 by the engagement of the locking protrusion and the positioning hole. When the positioning member 30 abuts against the position-limiting sleeve 40, the first locking protrusion 31 can be matched with the first positioning hole 11.

As shown in fig. 3, the first locking protrusion 31 is provided with a slope a for facilitating the sliding out of the first positioning hole 11. The inclined surface a has a guiding function and also has a component force function, and during the slipping process, a part of transverse force can be converted into vertical axial force, and the vertical axial force can act on the elastic part 32 to enable the elastic part 32 to deform inwards. Of course, curved surfaces may be used instead of angled surfaces. The first catching protrusion 31 may be hemispherical.

In this embodiment, the direction B of the inclined plane a is perpendicular to the axial direction C of the small telescopic joint 20, and the positioning member 30 and the first engaging protrusion 31 are driven to rotate by rotating the small telescopic joint 20, so that the first engaging protrusion 31 is slid out of the first positioning hole 11 with the aid of the inclined plane a. As shown in fig. 4, the clockwise rotation enables the first catching protrusion 31 to slip out of the first catching hole 11.

In order to limit the rotation angle of the positioning member 30, the inner wall of the large telescopic joint 10 is provided with a stopper 12. In this embodiment, there are two limiting parts 12 symmetrically disposed on the inner wall of the large telescopic joint 10. The positioning member 30 has two pieces, and the two pieces of positioning member 30 are symmetrically disposed on the outer wall of the small telescopic joint 20 and separated by two limiting portions 12. The first locking protrusion 31 can be more conveniently locked in the first positioning hole 11 or separated from the first positioning hole 11 by limiting the rotation angle of the positioning member 30. Namely, the forward rotation clamping and the reverse rotation separation, and the use is more convenient and handy.

In other embodiments, the direction B of the inclined surface a is the same as the axial direction C of the small telescopic joint 20, the positioning element 30 and the first protrusion 31 are driven to slide by directly sliding the small telescopic joint 20, and the first protrusion 31 slides into or out of the first positioning hole 11 with the aid of the inclined surface a, so that the positioning of the positioning element 30 can also be achieved.

As shown in fig. 5, the positioning member 30 includes a base surface 35 attached to the outer wall of the small telescopic joint 20 and an arc-shaped drum surface 36 protruding from the base surface 35, and the arc-shaped drum surface 36 abuts against the inner wall of the large telescopic joint 10. After the positioning piece 30 and the small telescopic joint 20 are fixed, the base surface 35 is attached to the outer wall of the small telescopic joint 20, and the arc-shaped drum surface 36 abuts against the inner wall of the large telescopic joint 10, so that a pretightening force is provided between the small telescopic joint 20 and the large telescopic joint 10 to position the small telescopic joint 20 and the large telescopic joint 10, and the telescopic rod can be positioned at any length position. The arc-shaped drum surface 36 protruding from the base surface 35 has a certain elasticity, when the positioning element 30 is located between the small telescopic joint 20 and the large telescopic joint 10, the arc-shaped drum surface 36 is abutted against the inner wall of the large telescopic joint 10, so that the arc-shaped drum surface 36 is slightly elastically deformed, the elastic force generated by the elastic deformation enables a certain positioning friction force to be generated between the small telescopic joint 20 and the large telescopic joint 10, and when the axial acting force exceeds the positioning friction force, the positioning is still realized by the engagement of the first clamping protrusion 31 and the first positioning hole 11. The arcuate drumhead 36 is not limited to the illustrated shape, and may be a deformed curved surface having an equivalent function. The positioning member 30 has a simple structure, can be formed in one step during production, is low in cost and convenient to assemble, and has a good positioning effect.

To further improve the positioning effect, the positioning member 30 includes two arc-shaped bulges 36 and a base surface 35, the base surface 35 is located at the middle of the positioning member 30, and the arc-shaped bulges 36 are located at the two ends of the positioning member 30. The securing member 30 has narrowed portions 37 at both ends. The base surface 35 separates the two arc-shaped drum surfaces 36 by a certain distance, so that any two sections of the small expansion joints 20 and the large expansion joint 10 are provided with two positioning points in the length direction, and the expansion link can be prevented from shaking while the axial positioning effect is improved. The provision of the constriction 37 increases the structural strength of the securing member 30.

In other embodiments, the positioning member 30 may have a notched ring structure, such that one positioning member 30 may be used.

It should be understood that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some technical features; and all such modifications and alterations should fall within the scope of the appended claims.

Claims

1. The utility model provides a telescopic link, includes two section at least coaxial big telescopic joint and the little telescopic joint that cup joints, the rear end of little telescopic joint is fixed with the setting element, the setting element follows little telescopic joint slides, its inner wall with little telescopic joint laminating, its outer wall support lean on the inner wall of big telescopic joint, its characterized in that, be equipped with first card protruding on the setting element, set up on the big telescopic joint with first protruding complex first locating hole of card.

2. The telescopic rod according to claim 1, wherein the positioning member is provided with a deformable elastic portion, and the first clamping protrusion is arranged on the elastic portion.

3. The telescopic rod according to claim 2, wherein the positioning member is provided with two strip-shaped holes at intervals, and the elastic part is formed between the two strip-shaped holes.

4. The extension pole of claim 2 wherein said elastic portion is U-shaped.

5. The telescopic rod according to claim 2, wherein an avoidance groove is formed in the small telescopic joint at a position corresponding to the elastic part.

6. The telescopic rod according to any one of claims 1 to 5, wherein the first locking protrusion is provided with a slope for sliding out of the first positioning hole.

7. The telescopic rod according to claim 6, wherein the direction of the inclined surface is perpendicular to the axial direction of the small telescopic joint, the positioning member is driven to rotate by rotating the small telescopic joint, and the first clamping protrusion slides off the first positioning hole with the aid of the inclined surface.

8. The telescopic rod of claim 7, wherein the inner wall of the large telescopic joint is provided with a limiting part for limiting the rotation angle of the positioning piece.

9. The telescopic rod of claim 8, wherein two limiting parts are symmetrically arranged on the inner wall of the large telescopic joint; the locating piece has two, and these two locating pieces symmetry set up in on the outer wall of little telescopic joint to be separated by two spacing portions.

10. The telescopic rod according to any one of claims 1 to 5, wherein the first locking protrusion is provided with a curved surface for sliding out of the first positioning hole.

11. The telescopic rod according to any one of claims 1 to 5, wherein the inner wall of the positioning member is provided with a second protrusion, and the small telescopic joint is provided with a second positioning hole matched with the second protrusion.

12. The telescopic rod according to any one of claims 1 to 5, wherein a stop sleeve for blocking the positioning piece is fixed on the inner wall of the front end of the large telescopic joint.

13. The telescopic rod according to any one of claims 1 to 5, wherein the positioning member comprises a base surface attached to the outer wall of the small telescopic joint and an arc-shaped drum surface protruding from the base surface, and the arc-shaped drum surface abuts against the inner wall of the large telescopic joint.

14. The telescoping pole of claim 13, wherein said positioning member comprises two arcuate drumheads and a base surface, said base surface being located at a middle portion of said positioning member, said arcuate drumheads being located at opposite ends of said positioning member.

15. The telescopic rod according to claim 14, wherein both ends of the positioning member are provided with a narrowing.