CN107228110A - Telescoping tube - Google Patents

Abstract

The invention provides a telescopic tube, which includes an outer tube and an inner tube, and also includes an outer end plug, the outer end plug is arranged at one end of the outer tube, and the inner tube is inserted into the end; the outer The end plug includes a ring body and a rolling body, the rolling body is arranged on the ring body; the rolling body partially protrudes from the inner surface of the ring body, and the rolling body is not higher than the outer surface of the ring body; The outer surface of the ring body is fitly connected with the inner wall of the outer tube; the outer wall of the inner tube is fitted with clearance between the rolling body. The beneficial effect of the invention is that the outer end plug is added, and the inner pipe and the outer end plug cooperate to telescopically move, which can reduce the resistance caused by the size and shape deviation between the outer pipe and the inner pipe. An inner end plug is also added. The inner end plug has a supporting surface that matches the inner wall of the outer tube, so that there are two sets of matching connections between the outer tube and the inner tube, making the expansion and contraction more stable and smooth, and the adjustment of the expansion and contraction is also more labor-saving and the noise is also low. .

Description

flexible tube

technical field

The invention relates to an article requiring length or height adjustment, especially a telescoping tube.

Background technique

Existing products, which are more and more humanized, can meet various needs of different users.

Existing users, such as children and adults, can be divided into multiple levels of height. Correspondingly, there are also various height requirements for products. Improve.

Contents of the invention

In order to solve the above-mentioned existing technical problems, the present invention provides a telescopic tube, which adds an outer end plug, and the inner tube and the outer end plug cooperate to realize telescopic movement, and there is rolling friction between the inner tube and the outer end plug, which can reduce the external The resistance caused by the size and shape deviation between the tube and the inner tube makes the expansion and contraction more stable and smooth.

The present invention solves the above-mentioned existing technical problems, and provides a telescopic tube, which includes an outer tube and an inner tube, and also includes an outer end plug, the outer end plug is arranged at one end of the outer tube, and the inner tube is plugged into at the end; the outer end plug includes a ring body and a rolling body, and the rolling body is arranged on the ring body; the rolling body partially protrudes from the inner surface of the ring body, and the rolling body is not higher than The outer surface of the ring body; the outer surface of the ring body is mated with the inner wall of the outer tube; the rolling body is in clearance fit with the outer wall of the inner tube.

Further improvements of the present invention are as follows.

The rollers are balls or needles.

The ring body has a mounting hole, and the rolling body is arranged in the mounting hole.

There is at least one roller, or a plurality of uniformly distributed rollers.

A ring step is provided on the outer surface of the ring body, and the outer pipe is butted with the ring step.

The telescopic tube includes an inner end plug which is arranged at the end of the inner tube; the inner end plug is accommodated inside the outer tube and moves synchronously with the inner tube.

The inner end plug has a supporting part, and the supporting part is located at the periphery of the inner tube and fits with the inner wall of the outer tube.

The support portion has at least two mating surfaces arranged at intervals.

The inner end plug includes a rolling body, the rolling body is arranged on the supporting part; the rolling body partially protrudes from the surface of the supporting part.

The rollers are balls or needles.

Compared with the prior art, the beneficial effect of the present invention is that the outer end plug is added, and the inner pipe and the outer end plug cooperate to telescopically move, which can reduce the resistance caused by the size and shape deviation between the outer pipe and the inner pipe. An inner end plug is also added. The inner end plug has a supporting surface that matches the inner wall of the outer tube, so that there are two sets of matching connections between the outer tube and the inner tube, making the expansion and contraction more stable and smooth, and the adjustment of the expansion and contraction is also more labor-saving and the noise is also low. .

Description of drawings

Fig. 1 is a schematic structural view of the outer end plug of the telescopic tube of the present invention.

FIG. 2 is a schematic cross-sectional view of FIG. 1 .

Fig. 3 is a schematic diagram of the structure of the ring body in Fig. 1 .

Fig. 4 is a schematic structural view of the outer end plug disposed on the outer tube.

Fig. 5 is a structural schematic diagram of the inner end plug.

Fig. 6 is a schematic diagram of cooperation between the inner tube provided with the inner end plug and the outer tube.

Fig. 7 is a schematic diagram of cooperation between the inner end plug and the outer tube.

Outer tube 11 Outer end plug 12 ring body 121 Mounting hole 1211, ring step 1212 Roller 122 inner tube 13 Inner plug 14 support part 141 Support surface 1411 Roller 142

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1 to 7, a telescopic tube includes an outer tube 11, an inner tube 13 and an outer end plug 12, the outer end plug 12 is arranged at one end of the outer tube 11, and the inner tube 13 is inserted into the end ; The inner tube 13 can slide along the outer tube 11, that is, elongate or shorten, thereby changing the overall length. The outer end plug 12 includes a ring body 121 and a rolling body 122, the rolling body 122 is arranged on the ring body 121, the rolling body 122 partially protrudes from the inner surface of the ring body 121, and at the same time, the rolling body 122 is not higher than the outer surface of the ring body 121, Make the outer surface of the ring body 121 fit and connect with the inner wall of the outer tube 11; the outer wall of the roller 122 and the inner tube 13 is a clearance fit, so that the outer end plug 12 and the outer tube 11 are fixed, and the outer end plug 12 is opposite The inner tube 13 slides.

The roller 122 of the present invention can adopt two methods, ball or needle. For example: when the outer wall of the inner tube 13 is arc-shaped, the ball fit method can be selected; when the outer wall of the inner tube 13 is flat, the needle roller fit method can be selected; A matching method in which multiple balls are arranged side by side.

The ring body 121 of the present invention has a mounting hole 1211, and the rolling body 122 is arranged in the mounting hole 1211. Because the rolling body 122 is not in contact with the outer tube 11 but can be in contact with the inner tube 13, the rolling body 122 can be mounted from the inside of the ring body 121. placed in the installation hole 1211.

There is at least one roller 122 in the present invention, and one roller 122 can contribute to the rolling friction of the inner tube 13 relative to the outer end plug 12, or a plurality of uniformly distributed ones are also acceptable.

A ring step 1212 is provided on the outer surface of the ring body 121 of the present invention, and the outer tube 11 and the ring step 1212 are butted together.

The telescopic tube of the present invention includes an inner end plug 14, which is arranged at the end of the inner tube 13; the inner end plug 14 is accommodated inside the outer tube 11 and moves synchronously with the inner tube 13.

The inner end plug 14 of the present invention has a support portion 141 located on the periphery of the inner tube 13 and matched with the inner wall of the outer tube 11 . The support portion 141 has at least two matching surfaces arranged at intervals, and the matching surfaces can be arranged symmetrically according to the shape of the inner wall of the outer tube 11 . Alternatively, the inner end plug 14 includes a roller body 142, and the roller body 142 is arranged on the support portion 141; the roller body 142 partially protrudes from the surface of the support portion 141, so that sliding or rolling occurs between the inner end plug 14 and the inner wall of the outer tube 11 friction. The rollers 142 are balls or needles.

In the present invention, an outer end plug 12 is added, and the inner tube 13 and the outer end plug 12 cooperate to telescopically move, which can reduce the resistance caused by the size and shape deviation between the outer tube 11 and the inner tube 13 . Also set up inner end plug 14, inner end plug 14 has the supporting surface 1411 that matches with outer pipe 11 inner wall, has two groups of matching connections between outer pipe 11 and inner pipe 13 like this, makes expansion and contraction more stable, smooth, and expansion and contraction adjustment is also easy. Less effort and less noise.

The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field of the present invention, without departing from the concept of the present invention, some simple deduction or replacement can be made, which should be regarded as belonging to the protection scope of the present invention.

Claims (10)

1. a kind of telescoping tube, including outer tube and inner tube, it is characterised in that：Also include outer end plug, the outer end plug is arranged at described The one end of outer tube, said inner tube is plugged in the end；

The outer end plug includes ring body and roll body, and the roll body is arranged at the ring body；The roll body locally protrudes from the ring The inner surface of body, the roll body is not higher than the outer surface of the ring body；

The outer surface of the ring body and the inwall of the outer tube are connected；

Coordinate between the roll body and the outer wall of said inner tube for gap.

2. telescoping tube according to claim 1, it is characterised in that：The roll body is ball or needle roller.

3. telescoping tube according to claim 2, it is characterised in that：The ring body has mounting hole, and the roll body is arranged at The mounting hole.

4. telescoping tube according to claim 3, it is characterised in that：The roll body is at least one, or equally distributed It is multiple.

5. telescoping tube according to claim 1, it is characterised in that：The outer surface of the ring body sets a loop order, described outer Pipe is docking together with the loop order.

6. the telescoping tube according to claim 1 to 5 any one, it is characterised in that：The telescoping tube includes interior end plug, institute State the end that interior end plug is arranged at said inner tube；The interior end plug is placed in the inside of the outer tube, fortune synchronous with said inner tube It is dynamic.

7. telescoping tube according to claim 6, it is characterised in that：The interior end plug has at supporting part, the supporting part Coordinate in the periphery of said inner tube, and with the inwall of the outer tube.

8. telescoping tube according to claim 7, it is characterised in that：The supporting part has spaced at least two to match somebody with somebody Conjunction face.

9. telescoping tube according to claim 7, it is characterised in that：The interior end plug includes roll body, and the roll body is arranged at The supporting part；The roll body locally protrudes from the surface of the supporting part.

10. telescoping tube according to claim 9, it is characterised in that：The roll body is ball or needle roller.