CN1307932C

CN1307932C - Dust collector expansion pipe

Info

Publication number: CN1307932C
Application number: CNB2005100387034A
Authority: CN
Inventors: 沈盘根
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-04-05
Filing date: 2005-04-05
Publication date: 2007-04-04
Anticipated expiration: 2025-04-05
Also published as: CN1686042A; DE202005007944U1

Abstract

The present invention relates to a structural improvement of a locking mechanism of an expansion pipe of a suction cleaner, which belongs to the technical field of household appliances. The mechanism comprises an inner pipe and an outer pipe which are sheathed with each other, wherein the outer wall of the inner pipe is provided with an axial slide slot, and circumferential U-shaped slots which are basically symmetrical are arranged at both sides of the axial slide slot in a spacing mode; the end part of the outer pipe is fixed sheathed on a joint sleeve on the inner pipe. A locking mechanism is arranged on the joint sleeve, wherein the locking mechanism is mainly composed of an elastic V-shaped locking sheet and a bolt block; the elastic V-shaped locking sheet falls in the axial slide slot through one end of the joint sleeve, and a hole is penetrated on the end of joint sleeve; a bolt head of the bolt block is inserted in a V-shaped opening of the V-shaped locking sheet, and the other end of the bolt block is abutted on a spring positioned at the other end of the joint sleeve. An expansion pipe of a suction cleaner of the present invention, which adopts the structure of the present invention, has the advantages of reliable locking and convenient adjustment; moreover, a radial loosening space for the locking mechanism does not need to be reserved like the prior art, so the structure is compact.

Description

Dust collector expansion pipe

Technical field

The present invention relates to a kind of dust catcher parts, especially a kind of architecture advances of dust collector expansion pipe locking mechanism belongs to household electrical appliance technical field.

Background technology

In order to satisfy the demand of existing dust catcher to the sweep-up pipe length adjustment, sweep-up pipe usually is designed to the telescopic locking structure.Its typical structure mainly is made up of outer tube 18, interior pipe 11, positioning roller 4, pressing push button 13 as shown in Figure 1.In pipe 11 to be provided with some location recessed 3, the pressing push button is equipped with the inclined-plane push pedal 5 times, passing the pressing push button, can to make positioning roller 4 be absorbed in the location recessed 3, thereby the inner and outer pipes that will regulate length is sealed.Yet the axial slide 6 of this locking mechanism and radial location recessed 3 are located at the outer wall of inner tube both sides, and processing needs two procedures, interior pipe easy deformation.

For this reason, the Chinese patent that application number is 03210353.0, the applying date is 2003.09.02 discloses the expansion sweep-up pipe that uses on a kind of dust catcher.This sweep-up pipe comprises the inner and outer pipe that connects together, the affixed cover in the end of outer tube joint on inner pipe, joint is provided with locking mechanism, it is characterized in that having on the outer wall of inner tube axial slide of an end opening, there is the radially U-lag of 12～25 groups of symmetries the both sides of this axial slide, U-lag communicates with axial slide and is vertical, and locking mechanism cooperates with U-lag; Axial slide is built-in with the convex tendon that is located on the inner nosepiece wall.Because U-lag and axial slide are concentrated on a place, pipe has reduced the deflection of interior pipe by one manufacturing procedure moulding in therefore making.Yet, the locking mechanism of this sweep-up pipe and above-mentioned prior art are basic identical, still rely on the spacing purpose that reaches locking up and down after positioning roller falls into the U-shaped groove, therefore when having wearing and tearing of push pedal inclined-plane or distortion, positioning roller deviates from, lock inadequately problem reliably easily, and it is bigger to lock the position radial dimension.

Summary of the invention

The present invention wants the technical solution problem to be: at the shortcoming that above prior art exists, propose the dust collector expansion pipe of the more reliable and compact conformation of a kind of locking.

In order to solve above technical problem, dust collector expansion pipe of the present invention comprises the interior pipe and the outer tube of mutual socket, has axial slide on the described outer wall of inner tube, and the both sides of described axial slide are shaped on the circumferential U-lag of basic symmetry at interval; The end of described outer tube on inner pipe the fitting sleeve of cover that is connected, described fitting sleeve is provided with locking mechanism, wherein said locking mechanism mainly is made of elasticity V-arrangement locking plate, latch piece, described elasticity V-arrangement locking plate drops in the axial slide by an end of boring a hole on the fitting sleeve, insert the fork of described latch piece in its V-arrangement opening, the other end of described latch piece is resisted against on the spring that is positioned at the fitting sleeve perforation other end.

Under normal operating position, spring pushing and pressing latch piece is inserted in the V-arrangement opening of elasticity V-arrangement locking plate, makes its both sides separately, stretch into respectively in the pair of U-shaped groove of outer wall of inner tube axial slide both sides, thus pipe and the locking of outer tube relative position in making, can not telescopic moving.Have wedge action because fork inserts the V-arrangement opening, therefore locking is very reliable, even the long-term phenomenon that also can not occur getting loose once in a while of using.When needs are regulated dust collector expansion pipe length, push and plug pin block to the spring direction, its fork is deviate from from the V-arrangement opening of elasticity V-arrangement locking plate, this moment is when managing in the pull from outer tube, interior tubular axis will inwardly be pushed elasticity V-arrangement locking plate to the U-lag of chute both sides, make it that inside purse up of strain take place, chute moves thereby be able to vertically, reaches the purpose of regulating telescoping tube length.After mixing up, unclamp the latch piece, under spring action, elasticity V-arrangement locking plate will enter above lock-out state once more.

It is reliable, easy to adjust to adopt the dust collector expansion pipe of structure of the present invention not only to lock, and need not to resemble the radially pine oil space of reserving locking mechanism the prior art, so compact conformation.

Description of drawings

The present invention is further illustrated below in conjunction with accompanying drawing.

Fig. 1 is the prior art constructions schematic diagram.

Fig. 2 is the structural representation of one embodiment of the invention.

Fig. 3 is the vertical view (removing push button and outer tube) of Fig. 2.

Fig. 4 is the structural representation of interior pipe among Fig. 2.

The specific embodiment

Embodiment one

The dust collector expansion pipe of present embodiment shown in Fig. 2,3,4, mainly by the interior pipe 11 of mutual socket and outer tube 18, be connected in the locking mechanism that fitting sleeve 12, elasticity V-arrangement locking plate 17 and the latch piece 16 of outer tube end constitute by screw 14 and form.Have axial slide 21 as shown in Figure 4 on the outer wall of interior pipe 11, the both sides of this axial slide are shaped on the circumferential U-lag 20 of basic symmetry at interval.Be shaped on the fitting sleeve 12 and elasticity V-arrangement locking plate 17, the similar perforation of latch piece 16 envelope profiles.The elasticity V-arrangement locking plate 17 of locking mechanism is shaped on the symmetrical circular arc lug that matches with U-lag 20, end by perforation on the fitting sleeve 12 drops in the axial slide 21, insert the fork of latch piece 16 in its V-arrangement opening, this latch piece is T-shaped, the other end is resisted against on the spring 15 that is positioned at the fitting sleeve perforation other end, the middle part is shaped on mounting hole, is shaped on the boss that tightly is inserted in the mounting hole below the push button 13, covers above the locking mechanism.

Under the normal condition, spring 15 pushing and pressing latch pieces 16 are inserted in the V-arrangement opening of elasticity V-arrangement locking plate 17, make its both sides separately be butterfly, stretch in the pair of U-shaped groove 20 of axial slide both sides, with interior pipe 11 and outer tube 18 lockings.When needs length, promote push button 13 to spring 15 directions, latch piece 16 is deviate from from the V-arrangement opening of elasticity V-arrangement locking plate 17 thereupon, manage in the pull this moment, the U-lag 20 of axial slide both sides will inwardly be pushed elasticity V-arrangement locking plate 17, make its inside purse up, chute moves freely thereby be able to vertically, reaches the purpose of regulating telescoping tube length.After mixing up, unclamp push button 13, spring reset, elasticity V-arrangement locking plate 17 will enter above lock-out state once more.

The dust collector expansion pipe advantage that experiment showed, present embodiment is:

1, locking is reliable, regulates freely easy accessibility;

2, the similar perforation on the fitting sleeve has desirable guiding, position-limiting action, has strengthened the reliability of locking mechanism.

3, compact conformation, profile are carefully and neatly attractive in appearance;

4, elasticity V-arrangement locking plate in the retaining mechanism and the equal injection mo(u)lding of latch piece, technology is simple, low cost of manufacture.

In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.

Claims

1. dust collector expansion pipe comprises the interior pipe and the outer tube of mutual socket having axial slide on the described outer wall of inner tube that the both sides of described axial slide are shaped on the circumferential U-lag of basic symmetry at interval; The end of described outer tube on inner pipe the fitting sleeve of cover that is connected, described fitting sleeve is provided with locking mechanism, it is characterized in that: described locking mechanism mainly is made of elasticity V-arrangement locking plate, latch piece, described elasticity V-arrangement locking plate is shaped on the symmetrical circular arc lug that matches with U-lag and drops in the axial slide by an end of boring a hole on the fitting sleeve, insert the fork of described latch piece in its V-arrangement opening, the other end of described latch piece is resisted against on the spring that is positioned at the fitting sleeve perforation other end.

2. according to the described dust collector expansion pipe of claim 1, it is characterized in that: be shaped on the described fitting sleeve and elasticity V-arrangement locking plate, the similar perforation of latch piece envelope profile.

3. according to the described dust collector expansion pipe of claim 2, it is characterized in that: described latch piece is T-shaped.

4. according to the described dust collector expansion pipe of claim 3, it is characterized in that: described latch piece middle part is shaped on mounting hole, is shaped on below the push button tightly to be inserted in the boss in the mounting hole and to cover above the locking mechanism.