CN2620122Y

CN2620122Y - Telescopic pipe

Info

Publication number: CN2620122Y
Application number: CN 03226333
Authority: CN
Inventors: 邓海西
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-05-22
Filing date: 2003-05-22
Publication date: 2004-06-09
Anticipated expiration: 2013-05-22

Abstract

A extension tube provided in the utility model comprises an outer tube 2, an inner tube 1 and an easing fixture disposed between the inner and outer tubes, which is characterized in that the easing fixture comprises an eccentric column 4 and a plastic snap ring 3. The eccentric column is an involute eccentric column in which both ends are provided with a baffle 5. The plastic snap ring 3 is an annular wedge-shaped snap ring, which is jacketed on the eccentric column 4. The easing fixture is fixed on the end of the inner tube 1. Afterwards the inner tube 1 of this end and the easing fixture are pushed inside the outer tube2. If necessary, an additional sealing ring can be provided on the outer tube end, preventing the fixture from being pulled out. The utility model is a stepless extension tube, which has the advantages of simple structure, easy usage and excellent positioning performance.

Description

A kind of telescopic pipe

Technical field

The utility model relates to telescopic pipe or flexible rod.

Background technique

In daily life, some daily necessitiess need be used flexible rod, and as the floor mop handle, cool clothing bar, extension bicycle, ironing board and various family properties etc. are so that packed and transported or use.

Expansion device positioning performance in the existing flexible rod is not good enough, and perhaps complex structure uses inconvenient.

Summary of the invention

The purpose of this utility model provides a kind of simple in structure, easy to use and telescopic pipe that positioning performance is good.

The purpose of this utility model realizes by following technical solution:

A kind of telescopic pipe comprises outer tube, interior pipe and places degree of tightness fixing device between the inner and outer pipes that it is characterized in that: described degree of tightness fixing device includes biasing post and plastic clasp.

Described biasing post is the involute biasing post, and the two ends of biasing post are provided with plate washer, and described plastic clasp is enclosed within plastic clasp on the biasing post for ring wedge snap ring.

Further design is that the outer shroud of ring wedge plastic clasp is the gear type structure.

The degree of tightness fixing device is fixed on interior pipe end, and pipe pushed in the outer tube together with the degree of tightness fixing device in should holding then.

During use, pipe and outer tube in firmly twisting make the degree of tightness fixing device be in state or the locking state of pine, when the degree of tightness fixing device is loose state, ring wedge snap ring in the fixing device shrinks in eccentric by middle axle position, and outer tube does not have resistance, and inner and outer pipes can be free to slide relatively; When the degree of tightness fixing device was tight state, the ring wedge snap ring in the fixing device to extrapolation, was forced tightly in outer tube ring wedge card by eccentric wheel, and inner and outer pipe can not slide relative.

With accompanying drawing the utility model is further described below:

The drawing explanation

Fig. 1 is the eccentric wheel plan view;

Fig. 2 is the B-B sectional view of Fig. 1;

Fig. 3 is ring wedge snap ring diagrammatic sketch;

Fig. 4 is a structural representation of the present utility model;

Fig. 5 is the A-A sectional view of Fig. 4;

Fig. 6 is the locking state figure of Fig. 5.

Embodiment

As Fig. 1～shown in Figure 6, a kind of telescopic pipe that the utility model provides comprises outer tube 2, interior pipe 1 and places degree of tightness fixing device between the inner and outer pipes that it is characterized in that: described degree of tightness fixing device includes biasing post 4 and plastic clasp 3.

Described biasing post 4 is the involute biasing post, and the two ends of biasing post are provided with plate washer 5, and described plastic clasp 3 is enclosed within plastic clasp 3 on the biasing post 4 for ring wedge snap ring.

The outer shroud of the ring wedge plastic clasp 3 of this example is the gear type structure.

Pipe 1 end in the degree of tightness fixing device is fixed on should hold then and interior manage 1 and push in the outer tube 2 together with the degree of tightness fixing device, can add seal ring at outer tunnel end in case of necessity, fixing device was pulled out preventing.

During use, pipe 1 and outer tube 2 in firmly twisting, make the degree of tightness fixing device be in state or the locking state of pine, when the degree of tightness fixing device is loose state, as shown in Figure 5, ring wedge snap ring 3 in the fixing device shrinks in eccentric by middle axle position, and outer tube 2 leaves with the ring wedge snap ring 3 of fixing device, and inner and outer pipe can be free to slide relatively; When the degree of tightness fixing device was tight state, as shown in Figure 6, the ring wedge snap ring 3 in the fixing device to extrapolation, was forced tightly in outer tube ring wedge card 3 by eccentric wheel 4, and inner and outer pipe can not slide relative, reaches fixing effect.

The utility model is the stepless retractable pipe, has simple in structurely, easy to use, and positioning performance is good etc. Advantage.

Claims

1. telescopic pipe comprises outer tube (2), interior pipe (1) and places degree of tightness fixing device between the inner and outer pipes that it is characterized in that: described degree of tightness fixing device includes biasing post (4) and plastic clasp (3),

Described biasing post (4) is the involute biasing post, and the two ends of biasing post (4) are provided with plate washer (5), and described plastic clasp (3) is enclosed within plastic clasp (3) on the biasing post (4) for ring wedge snap ring,

The degree of tightness fixing device is fixed on interior pipe (1) end, and pipe (1) pushed in the outer tube (2) together with the degree of tightness fixing device in should holding then.

2. a kind of telescopic pipe according to claim 1 is characterized in that: the outer shroud of described ring wedge plastic clasp (3) is the gear type structure.

3. a kind of telescopic pipe according to claim 1 is characterized in that: the end of described outer tube (2) adds seal ring.