CN1203775A

CN1203775A - Telescopic dust suction pipe for vacuum cleaner

Info

Publication number: CN1203775A
Application number: CN 98110777
Authority: CN
Inventors: 徐为尔
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-04-13
Filing date: 1998-04-13
Publication date: 1999-01-06
Anticipated expiration: 2018-04-13
Also published as: CN1118265C

Abstract

The telescopic dust suction pipe for vacuum cleaner includes an internal pipe and an external pipe. The described internal pipe is inserted into the external pipe, and a position-locking mechanism is set between the internal pipe and external pipe. It is characterized by that on the described internal pipe there is an axially-inlaid toothed bar, and the position-locking mechanism is equipped with an elastic block which can be inserted in the toothed recess. Its internal pipe and toothed bar can be made up separately, so that said internal pipe can be made up by using a set of extruding mould, and can be cut into the required length.

Description

The expansion sweep-up pipe of dust catcher

The present invention relates to the sweep-up pipe that uses on a kind of dust catcher.

In the prior art, the sweep-up pipe of dust catcher adopts corrugated flexible hose to draw from dust catcher, connects by telescopic hard tube to form pipeline again, present hard tube all adopts aluminium alloy or chrome faced steel to make, because pipe adopts drawing process to make, so its axial size is difficult to guarantee that tolerance is very big.Make hard tube with mould of plastics and can guarantee tolerance within the limits prescribed, but need to be provided with the positioning tooth of many axially-aligned on the outer wall of inner tube,, improved production cost so the interior pipe that differs for length need be made the mould of all lengths.

The purpose of this invention is to provide the plastic inner pipe that a kind of positioning tooth can be suitable for random length, can be made into the expansion sweep-up pipe of dust catcher by pipe in this.

Technical scheme of the present invention is: the expansion sweep-up pipe of dust catcher, and pipe and outer tube in comprising, described interior pipe is inserted in the outer tube, is provided with position locking mechanism between described interior pipe and the outer tube; Axially be embedded with tooth bar mutually on the pipe in described, the flexible block on the described position locking mechanism is inserted in the mark of mouth groove of described tooth bar.

The present invention compared with prior art has following advantage:

Because tooth bar is to be embedded on the inner pipe wall mutually, so interior pipe and tooth bar can separately be made, interior like this pipe can be made pipe with a secondary extrusion die, the length of intercepting regulation on demand.Tooth bar can be made with metal material, length intercepting on demand.

The invention will be further described below in conjunction with drawings and Examples:

Accompanying drawing 1 is a structural front view of the present invention;

Accompanying drawing 2 is the A-A direction cutaway view of accompanying drawing 1;

Sectional view when accompanying drawing 3 matches with tooth bar for interior pipe;

Accompanying drawing 4 be tooth bar the part-structure view wherein:

[1]. outer tube; [2]. interior pipe; [3]. tooth bar; [4]. flexible block; [5]. push button; [6]. stopper spring; [7]. the mark of mouth groove; [8]. strip groove; [9]. guiding surface.

Embodiment: referring to accompanying drawing, a kind of expansion sweep-up pipe of dust catcher, comprise interior pipe [2] and outer tube [1], pipe [2] is inserted in the outer tube [1] in described, be provided with position locking mechanism between pipe [2] and the outer tube [1] in described, this position locking mechanism can be with the locking of the relative position between interior pipe [2] and the outer tube [1], and pipe [2] can elongate relatively with outer tube [1] in making; Axially be embedded with tooth bar [3] mutually on the pipe [2] in described, flexible block on the described position locking mechanism [4] is inserted in the mark of mouth groove [7] of described tooth bar [3], but flexible block [4] is inserted in the mark of mouth groove [7] of diverse location manages [2] and outer tube [1] after interior in the relative fixed, and then makes the length of sweep-up pipe scalable.Pipe [2] outer tube wall is provided with axial strip groove [8] in described, and described tooth bar [3] is positioned at this strip groove [8] and tooth bar [3] forms embedding mutually with pipe [2], and the lateral edges that tooth bar [3] exposes is provided with a plurality of mark of mouth grooves [7].The method of described phase embedding is that described tooth bar [3] is inserted in the interior formation of the axial jack phase embedding on strip groove [8] sidewall, and the interior pipe [2] at described tooth bar [3] two ends is provided with the axially movable block of restriction tooth bar [3].In order to prevent that tooth bar [3] from dropping out, described tooth bar [3] is fixed on the interior pipe [2] tooth bar [3] in the tube wall inner bending of interior pipe [2].Referring to accompanying drawing 4, it is outwards open skewed that the oral area two side of the mark of mouth groove [7] on the described tooth bar [3] is, and is convenient to flexible block [4] and skids off in the mark of mouth groove [7] and slip into next mark of mouth groove, also can use the sidewall of arc.One end of the flexible block [4] that is inserted in the described mark of mouth groove [7] is gone up set guiding surface [9] with push button [5] and is contacted, when axial promotion push button [5], described guiding surface [9] promotes flexible block [4] and breaks away from described mark of mouth groove [7], when unclamping described push button [5], flexible block [4] promptly enters in the corresponding mark of mouth groove [7].Another kind of tooth bar [3] and interior pipe [2] structure of embedding mutually are to manage in described on the tube wall of [2] axially to have strip groove [8], be embedded with outer surface in this strip groove [8] mutually and be provided with the tooth bar [3] of a plurality of mark of mouth grooves [7], the inside of this strip groove makes tooth bar [3] can not drop out strip groove [8] greater than oral area.Guide effect when described strip groove [8] also has inner and outer pipe to slide relatively prevents to slide relatively between the inner and outer pipe.

Claims

1. the expansion sweep-up pipe of a dust catcher comprises interior pipe [2] and outer tube [1], and described interior pipe [2] is inserted in the outer tube [1], is provided with position locking mechanism between described interior pipe [2] and the outer tube [1]; It is characterized in that: axially be embedded with tooth bar [3] mutually on the pipe [2] in described, the flexible block on the described position locking mechanism [4] is inserted in the mark of mouth groove [7] of described tooth bar [3].

2. the expansion sweep-up pipe of dust catcher according to claim 1, it is characterized in that: pipe [2] outer tube wall is provided with axial strip groove [8] in described, described tooth bar [3] is positioned at this strip groove [8] and tooth bar [3] forms embedding mutually with pipe [2], and the lateral edges that tooth bar [3] exposes is provided with a plurality of mark of mouth grooves [7].

3. the expansion sweep-up pipe of dust catcher according to claim 2, it is characterized in that: described tooth bar [3] is fixed on the interior pipe [2] tooth bar [3] in the tube wall inner bending of interior pipe [2].

4. the expansion sweep-up pipe of dust catcher according to claim 2 is characterized in that: the oral area two side of the mark of mouth groove [7] on the described tooth bar [3] is outwards open skewed.

5. the expansion sweep-up pipe of dust catcher according to claim 2 is characterized in that: guiding surface [9] set on an end of the flexible block [4] that is inserted in the described mark of mouth groove [7] and the push button [5] contacts.

6. the expansion sweep-up pipe of dust catcher according to claim 1 is characterized in that: axially have strip groove [8] on the tube wall of pipe [2] in described, be embedded with the tooth bar [3] that outer surface is provided with a plurality of mark of mouth grooves [7] in this strip groove [8] mutually.

7. the expansion sweep-up pipe of dust catcher according to claim 2 is characterized in that: described tooth bar [3] is inserted in the axial jack on strip groove [8] sidewall and forms the phase embedding.

8. the expansion sweep-up pipe of dust catcher according to claim 2 is characterized in that: the interior pipe [2] at described tooth bar [3] two ends is provided with the axially movable block of restriction tooth bar [3].