CN2828512Y

CN2828512Y - Expansion pipe

Info

Publication number: CN2828512Y
Application number: CN 200520103169
Authority: CN
Inventors: 唐辉世
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-08-01
Filing date: 2005-08-01
Publication date: 2006-10-18
Anticipated expiration: 2015-08-01

Abstract

The utility model discloses an expansion pipe which is composed of an outer pipe and an inner pipe which is connected with the outer pipe and can be axially moved, wherein the outer pipe is provided with a fixing sleeve which is used for movably fixing the inner pipe. The utility model is characterized in that the axial outer surface of the inner pipe is formed with a concave guide slot, and the interior of the guide slot is axially formed with a plurality of positioning holes which are arranged in a queue; the interior of the fixing sleeve is provided with a braking ball, a slide block is arranged in the fixing sleeve above the braking ball and a spring is axially arranged on the fixing sleeve between the slide block and the fixing sleeve. Through the guiding and the positioning functions of the braking ball, the guide slot and the positioning holes, the extension, the shrinkage and the positioning of the expansion pipe can be easily realized.

Description

Telescopic pipe

Technical field

The utility model relates to a kind of pipe fitting, relates in particular to a kind of pipe fitting that can stretch.

Background technique

Traditional telescopic pipe, as be used for telescopic pipe on the vacuum cleaner, comprise outer tube, and can be connected in the outer tube and the interior pipe that moves vertically, coupling sleeve is installed on outer tube, between coupling sleeve and interior pipe, a braking device is being arranged.But make a general survey of existing various telescopic pipes, its complex structure mostly in the configuration of flexible and braking device, its fabricating cost height, installation, maintenance is very inconvenient, and sensitivity is low, will make braking device malfunctioning after using a period of time.

The model utility content

In order to solve the deficiencies in the prior art, the purpose of this utility model provides a kind of improved telescopic pipe.This improved flexible pipe structure is simple, highly sensitive, has good flexible effect.

In order to achieve the above object, the utility model adopts technological scheme to be: a kind of telescopic pipe, it is made up of with the also axially displaceable interior pipe that links to each other with outer tube outer tube, the fixed cover that is used for movable fixing interior pipe is installed on the described outer tube, it is characterized in that, tubular axis forms the guide groove of an indent on outer surface in described, axially forms the cave, location that several are a formation in the guide groove; Be mounted with a detent ball in described fixed cover, be mounted with a slide block in addition in fixed cover, this slide block is in the detent ball top, and other has a spring shaft to being installed on the fixed cover, and this spring is between described slide block and the fixed cover.

Adopted above-mentioned technological scheme, when needs are flexible, only need to promote slide block, make it along axial pressure spring and move to special position in the space between fixed cover and outer tube wall, detent ball just can break away from compacting, at this moment if slightly firmly be pulled outwardly or in push away interior pipe, detent ball just can break away from the location of internal pipe from the cave, location, pipe can elongate or shorten in making, after unclamping slide block, slide block resets under the effect of the restoring force of spring, and detent ball is pressed in the cave, location by the bottom surface of slide block again and again with interior pipe location.

Description of drawings

Fig. 1 is the phase diagram of telescopic pipe of the present utility model when being in fixedly;

Fig. 2 is that telescopic pipe of the present utility model is in the phase diagram in the time of can be stretched;

Fig. 3 is the schematic representation that telescopic pipe of the present utility model can be seen the cave, location;

Fig. 4 is the enlarged view of B portion among Fig. 1;

Fig. 5 is the A-A direction sectional view that amplifies among Fig. 3.

Embodiment

Referring now to accompanying drawing also in conjunction with the embodiments, the utility model is described and interpreted in detail, drawings and Examples all are the explanations to model utility, rather than to qualification of the present utility model.

Extremely shown in Figure 5 as Fig. 1, embodiment of the present utility model discloses a kind of telescopic pipe, it can be used on the vacuum cleaner, the occasion that pipe need be extended or shrinks that also can be used for other, described telescopic pipe comprises an outer tube 2, is socketed with in one pipe 1 in outer tube 2, outer tube 2 and in pipe 1 make by stainless steel, fixed cover 3 is installed on outer tube 2, and fixed cover 3 is fixed with outer tube by a screw 4; Pipe forms the guide groove 13 of axial indent on 1 outer surface in described, and this guide groove 13 extends axially not end to interior pipe along interior pipe 1, overlaps 9 at the not end inwall of interior pipe in by one and fixedly is connected to a block 14; Described guide groove 13 forms several caves 11, location on the heart line therein, and as shown in Figure 3, this cave 11, location is hemisphere or approximate hemispheric depression, and is equally spaced queue distribution on this guide groove 13.

Be provided with a cylindrical hole on fixed cover 3, have a detent ball 7 to be installed in the cylindrical hole on the fixed cover 3, detent ball can be rolled in cylindrical hole.Detent ball is and the corresponding spherical steel ball of sphere in cave 11, location, and during by push-and-pull, this sphere steel ball cooperates with guide groove 13 at interior pipe, and playing leading role also can rolling freely in cylindrical hole.Be mounted with a spring 5 on fixed cover 3, in addition be provided with a slide block 6 on fixed cover 3, the bottom of slide block 6 has a spring eye 61, and an end of this spring 5 is fixed on the fixed cover 3, and the other end is compressive state and is against on the inwall of spring eye of slide block 6 611.The other end of slide block 6 bottom has an extension block 62, this extension block 62 to be stuck between fixed cover and the outer tube 2, has a bead hole 621 in the centre of extension block 62, and other is at the button 8 that is externally connected to of slide block 6, and makes slide block 6 be embedded in the button 8.

Detent ball 7 is pressed in the cave, location by the bottom surface of slide block 6 among Fig. 1, and pipe is fixed in this moment.As shown in Figure 2, when using hand propulsion button 8, to promote slide block 6 along moving axially on the space between the inwall of fixed cover and outer tube 2, make that spring 5 is further compressed, be pulled to the positive stop end of fixed cover when slide block after, bead hole 621 on the slide block extension block is positioned at the top of detent ball 7 just at this moment, this moment, detent ball 7 no longer was subjected to the restriction of slide block 6, as long as slightly firmly be pulled outwardly interior pipe, detent ball 7 will be pushed up in the bead hole 621 from the cave, location, so just interior pipe therefrom can be pulled out, reach purpose with the pipe elongation, vice versa, also interior pipe can be pushed in the outer tube, reaches the purpose that shortens pipe range.After loosing one's grip, slide block 6 resets under the effect of the restoring force of spring 5, detent ball 7 can break away from bead holes 621 and be pressed in nearby the cave, location, and is pushed down again by the bottom surface of slide block 6, so just interior pipe can be positioned at any and locate cave 11 and detent ball 7 position contacting.In this process, detent ball has just realized the positioning action of its internal pipe.As seen, by guiding, the positioning action in detent ball and guiding groove, cave, location, can realize easily telescopic pipe elongation, shrink and locate.

Claims

1. telescopic pipe, it is made up of with the also axially displaceable interior pipe that links to each other with outer tube outer tube, the fixed cover that is used for movable fixing interior pipe is installed on the described outer tube, it is characterized in that, tubular axis forms the guide groove of an indent on outer surface in described, axially forms the cave, location that several are a formation in the guide groove; Be mounted with a detent ball in described fixed cover, be mounted with a slide block in addition in fixed cover, this slide block is in the detent ball top, and other has a spring shaft to being installed on the fixed cover, and this spring is between described slide block and the fixed cover.

2. telescopic pipe according to claim 1 is characterized in that the bottom of described slide block has a spring eye, and an end of this spring is fixed on the fixed cover, and the other end is compressive state and is against on the inwall of spring eye of slide block.

3. telescopic pipe according to claim 1 and 2 is characterized in that, the rear end, bottom of described slide block is provided with an extension block, and this extension block is stuck between described fixed cover and the outer tube, has a ball hole that holds detent ball in the centre of extension block.