CN2930588Y

CN2930588Y - Retractable dust suction hose for vacuum cleaner

Info

Publication number: CN2930588Y
Application number: CN 200620071293
Authority: CN
Inventors: 朱建东
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-05-15
Filing date: 2006-05-15
Publication date: 2007-08-08
Anticipated expiration: 2016-05-15

Abstract

The utility model relates to a dust suction telescopic pipe of suction cleaner comprising an external pipe, an internal pipe, a slide and guide structure and a locking mechanism, which is characterized in the locking mechanism that: on the external surface of the internal pipe is axially arranged a groove, on both side walls or on one side wall of the groove is arranged a locking edge extending toward the center of the groove body, and the locking edge is provided with a locking notch or a locking hole; the external pipe is provided with a radially sliding locking hook which extends into the groove, the hook body which is the front part of the locking hook is arranged on the back of the locking edge, the back part of the locking hook extends out of the external pipe to directly serve as a button or to be connected with an actuating mechanism on the external pipe, and an elastic component acts on the locking hook and drives the locking lock to move outwards in radial direction, thereby forcing the hook body of the locking hook to correspondingly insert into the locking notch or the locking hole from the back of the locking edge. The utility model solves the problem that a deal bolt damages the external wall of the internal pipe. Moreover, the utility model is reliable in telescopic locking, simple in structure and easy in assembly, thereby improving production efficiency and reducing production cost.

Description

Dust collecting expansion pipe for vacuum cleaner

Technical field

The utility model relates to the sweep-up pipe of dust catcher, is specifically related to a kind of sweep-up pipe of flexible pipe structure.

Background technology

The sweep-up pipe of the most traditional dust catcher is to patch with a section hard tube to form, and the junction of each section hard tube plugs with bell, very easily come off during use, and its connection procedure is also pretty troublesome.

Afterwards, be the reliable and convenience of using that connects, people are designed to flexible pipe structure with sweep-up pipe.Mention flexible pipe structure, generally all comprise outer tube, be inserted in interior pipe in the outer tube bore, be located between described outer tube and the interior pipe and the pilot bushing of fixedlying connected with outer tube, be used to lock in the locking mechanism of pipe and outer tube relative position.The locking mechanism of common on the market telescopic tube is the needle-type latch-up structure, a plurality of detents promptly are set on outer wall of inner tube at interval, on pilot bushing, axially offer slide block slot, the rear portion hollow out of slide block slot is also placed roller, the slide block on band inclined-plane, rear portion is set in slide block slot, with slide block compressing roller, roller is fallen into cooperate the location in the detent.Between the roller of this needle-type locking mechanism and detent is that cambered surface contacts cooperation with cambered surface, roller just drops on and plays positioning action in the detent, and do not play real locking action, during use after sweep-up pipe is subjected to axial thrust, roller is easy to skid off from detent, thereby loses efficacy.If locking mechanism catastrophic failure in use, telescoping tube shortens, and not only can influence the normal use of dust catcher, even also can bring personal injury to the user.

Therefore, people are attempting the sweep-up pipe locking mechanism that design makes new advances in recent years, wherein tool is breakthrough and representationally be: Chinese patent is announced and disclosed a patent No. on July 7th, 2004 is 03239096.3, name is called the utility model patent of " sweep-up pipe of dust catcher ", this patent scheme introduction be a kind of telescopic tube with the lockpin-type locking mechanism, the concrete structure of its lockpin-type locking mechanism is as follows: offer a plurality of locking through holes within it on the tube wall at interval, corresponding outer tube and pilot bushing are provided with the lever elastic button, the lever elastic button is provided with dead bolt, dead bolt relies on elastic force to be against from outside to inside on the outer wall of interior pipe, and cooperates locking in the lock hole of embedding outer wall.In the such scheme, offered the locking through hole on the tube wall because of interior pipe, caused the ventilative problem of interior pipe tube chamber, just must in the tube chamber of interior pipe, serve as a contrast an internal lining pipe again for solution locking through hole has penetrated interior pipe.Such scheme is compared with the telescopic tube of needle-type locking mechanism in the past, lock more reliable, functional reliability strengthens, but, also have the following disadvantages: 1, under unlocked state, adjust in the process of this sweep-up pipe length, dead bolt is tight against sliding friction on outer wall of inner tube all the time, through repeatedly flexible use several times, will on outer wall of inner tube, stay ugly cut, destroyed the overall aesthetics of product; On the other hand, the material of sweep-up pipe more and more tends to adopt aluminium and plastics, and this two texture material is soft, not wear-resisting, more is unable to undergo the friction repeatedly of dead bolt.2, set up these parts of internal lining pipe because of need, just increased cost of manufacture and produced the workload of assembling.

Summary of the invention

The utility model provides a kind of dust collecting expansion pipe for vacuum cleaner, purpose is under the prerequisite that guarantees flexible locking reliability, change the action direction that is provided with of dead bolt, solve the problem of dead bolt damage outer wall of inner tube, and simplified structure to greatest extent, so that assembling is enhanced productivity and is reduced production costs.

For achieving the above object, the technical solution adopted in the utility model is: a kind of dust collecting expansion pipe for vacuum cleaner, comprise outer tube, interior pipe, gliding movement targeting structure and locking mechanism, interior pipe is inserted in the outer tube and cooperates formation to be in axial sliding connection by gliding movement targeting structure, and interior pipe is provided with the section of being slidingly connected between the outer tube, and seal is relative to be sealed, described locking mechanism is: the outer surface upper edge of interior pipe is axially arranged with groove, be provided with locking edge to the extension of cell body central authorities on this a groove two side or the sidewall, this locking edge upper edge axially spaced-apart offers locking notch or lock hole; Radially sliding of outer tube is provided with a latch hook, and this latch hook stretches in the groove, and its anterior coupler body is positioned at the locking edge back side; The latch hook rear portion extends to outer tube outside directly links to each other as button or with operating mechanism on being located at outer tube; There is a flexible member to act on the latch hook, and radially outwards driving of force direction, force the coupler body on the latch hook to embed locking notch or the lock hole from the contraposition of the locking edge back side, constitute from the locking mechanism of locking edge back side effect with this.

Related content in the technique scheme is explained as follows:

1, in the such scheme, described " being provided with locking edge to the extension of cell body central authorities on this a groove two side or the sidewall; " the words comprises establishing on the sidewall of following which floor concrete implication: a, gathering sill all establishes locking edge on locking edge or the two side, in general, when establishing locking edge on the two side, this both sides locking edge is symmetrical; B, as for the particular location of locking edge on sidewall: can be located at the edge, top of sidewall, also can be located at the top or the middle part of sidewall, as long as guarantee to leave between locking edge and gathering sill bottom surface the space of certain held latch hook coupler body; C, as for the direction that is provided with of locking edge: be extended to cell body central authorities from the gathering sill sidewall, promptly the direction of this locking edge be with the bottom surface of gathering sill with the aspect, specifically can be parallel with the gathering sill bottom surface, also can be not parallel, this locking edge itself can be a tabular limit, also can be the tabular limit of a circular arc; D, as for the connected mode of locking edge and interior pipe: can be that the outer wall one of the sidewall of gathering sill or interior pipe is extended and is shaped, also can be external fixing (as welding), preferred plan is: interior pipe is the aluminium section bar pipe or the plastic tube of one extrusion modling, and its tube chamber, gathering sill and locking edge all are one.

2, in the such scheme, " locking edge upper edge axially spaced-apart offers locking notch or lock hole ", described locking notch is meant the breach that is located on the locking edge edge, its concrete shape is not limit, and can be semicircle or square; Described lock hole is meant out that its concrete shape can be different shapes such as circular hole, square hole, irregularly-shaped hole at the through hole at locking edge middle part.The effect equivalence of locking notch and lock hole all has been the stepping positioning action.

3, in the such scheme, described " interior pipe is inserted in the outer tube to cooperate to form by gliding movement targeting structure and is in axial sliding connection; and interior pipe is provided with the section of being slidingly connected between the outer tube, and seal is relative to be sealed; " be meant on the section of being slidingly connected of interior pipe and outer tube, connect by seal between inside and outside caliber and guarantee tube chamber and extraneous relative sealing.In pipe specifically comprise following two kinds with the form that is slidingly connected between outer tube: when directly sliding nested the connection between a, interior pipe and outer tube, outer tube diameter and interior external diameter of pipe geomery all are complementary, and the internal face of outer tube and the outside wall surface of interior pipe are slidingly matched; It is nested that b, interior pipe and outer tube slide by a pilot bushing, and outer tube fixes on pilot bushing, and the internal diameter of pilot bushing and interior external diameter of pipe geomery all are complementary, and the internal face of pilot bushing and the outside wall surface of interior pipe are slidingly matched.

4, in the such scheme, described gliding movement targeting structure is made of gathering sill and guide pad cooperation, and in described gathering sill and the guide pad, one are located on the outer surface of interior pipe, and another person is located on the inwall of outer tube.Wherein, nearly step preferred plan is: be provided with a pilot bushing between described outer tube and the interior pipe, this pilot bushing is fixed on an end of outer tube, on the inwall of pilot bushing guide pad is set, groove on the interior pipe is as gathering sill, and guide pad embeds to form in the groove and is in axial sliding connection.

5, in the such scheme, the form that specifically is provided with at described latch hook rear portion comprises following two kinds:

(1), the latch hook rear portion extend to outer tube the outside directly as button, corresponding button sets firmly a button cover plate on the outer tube, this button cover plate is provided with button hole, button stretches out from button hole; And, a corresponding button hole block of limiting on the described button, this positive stop cooperates with button hole is spacing.

(2), the latch hook rear portion links to each other with operating mechanism on being located at outer tube, drive by operating mechanism; Wherein, operating mechanism specifically can be that following two kinds of concrete structure: a, described operating mechanism are the lever type button structure, this structure mainly is made of a lever pressing plate, one end rotational support of described lever pressing plate is on outer tube, its other end is as push-botton operation portion, the rear portion of latch hook extend against or be hinged on the middle part of lever pressing plate; B, described operating mechanism are pushing button structure, this structure mainly by slide block, spring and be located at slide block and spring on the push button cover plate constitute, slide block outwards is provided with operating portion, the relative outer sliding tube of slide block is dynamically connected, spring is located on the glide direction of slide block, the slide block back is provided with an inclined-plane or V-type groove, and the back side that is resisted against slide block is extended at the rear portion of latch hook, cooperates with inclined-plane or V-type groove.

6, in the such scheme, described flexible member is a stage clip, acts on latch hook front end face or the rear axle shoulder end face.

The utility model operation principle is: this telescoping tube has two duties: lock-out state and released state.Under the lock-out state, shown in accompanying drawing 2, latch hook 7 is upper because of the active force of stage clip 19 forces it to be in, locking in the locking notch 6 that the coupler body 8 on it embeds on the locking edge 5; When needing release, press button 9 on the other hand, pipe 2 was flexible in another hand was pinned, and latch hook 7 is pressed down to the next, its coupler body 8 breach 6 that goes out of lock, this moment be released state as shown in Figure 3; Can adjust telescoping tube length during release, coupler body 8 promptly slides along the back side of locking edge 5, and when adjusting to the right place, coupler body 8 can fall into next grade locking notch 6 positive locks again automatically.

Because the technique scheme utilization, the utility model compared with prior art has following advantage:

1, because the utility model has adopted the special locking mechanism from the effect of the locking edge back side, under released state, the latch hook coupler body is the back side that is against locking edge, and the back side of locking edge is outside sightless, stays the good looking appearance that cut also can not influence telescoping tube on it.

2, because the utility model has adopted the special locking mechanism from the effect of the locking edge back side, its coupler body colludes in locking notch or lock hole and locks, and is equal to existing lockpin-type locking from locking effect, locks very reliable, be difficult for losing efficacy, safe to use.

3, because the utility model just has been arranged with a gathering sill at the outer surface of interior pipe, its tube chamber is still fully airtight, and itself has satisfied the seal request of sweep-up pipe interior pipe, and need not to add internal lining pipe, reduce these parts of internal lining pipe, made assembling more convenient, also reduced cost.

4, because the utility model has adopted the special locking mechanism from the effect of the locking edge back side, the rear portion of its latch hook can directly extend to outer tube outward as a unlock button, has save the trouble of establishing operating mechanism in addition, simplifies the structure widely, reduce parts, reduced cost of manufacture.

5, the utility model material scope of application is wider, is particularly suitable for adopting the aluminium section bar and the plastic tube of one extrusion molding.

Description of drawings

Accompanying drawing 1 is looked schematic diagram for the complete section master of embodiment one;

Accompanying drawing 2 is looked the complete section schematic diagram for the left side of accompanying drawing 1, represents lock-out state among the figure;

Accompanying drawing 3 is also looked the complete section schematic diagram for the left side of accompanying drawing 1, represents released state among the figure;

View when accompanying drawing 4 is the locking of embodiment one locking mechanism;

View when accompanying drawing 5 presses down for the latch hook of embodiment one locking mechanism;

View when accompanying drawing 6 is the release of embodiment one locking mechanism;

Accompanying drawing 7 is the partial structurtes schematic perspective view of embodiment one;

Accompanying drawing 8 is the schematic diagram of embodiment two unlocking operation mechanisms;

Accompanying drawing 9 is the schematic diagram of embodiment three unlocking operation mechanisms.

In the above accompanying drawing: 1, outer tube; 2, interior pipe; 3, pilot bushing; 4, groove; 5, locking edge; 6, locking notch; 7, latch hook; 8, coupler body; 9, button; 10, button cover plate; 11, positive stop; 12, lever pressing plate; 13, push-botton operation portion; 14, slide block; 15, spring; 16, push button cover plate; 17, operating portion; 18, V-type groove; 19, stage clip; 20, location hole of the spring; 21, guide pad.

The specific embodiment

Below in conjunction with drawings and Examples the utility model is further described:

Embodiment one: shown in accompanying drawing 1～3 and accompanying drawing 7, a kind of dust collecting expansion pipe for vacuum cleaner, form by outer tube 1, interior pipe 2, pilot bushing 3 and locking mechanism, pilot bushing 3 is fixed on an end of outer tube 1, the internal face of pilot bushing 3 is provided with guide pad 21, the outer surface upper edge of interior pipe 2 is axially arranged with groove 4, guide pad 21 embeds guiding cooperation in the groove 4, and, the outer surface of the internal face of pilot bushing 3 and interior pipe 2 is complementary, face and face are slidingly matched, and interior pipe 2 is provided with linkage section between the outer tube 1 that seal is relative to be sealed.

Shown in accompanying drawing 1～3 and accompanying drawing 7, above-mentioned locking mechanism is: be provided with locking edge 5 to the extension of cell body central authorities on a sidewall of groove 4, these locking edge 5 upper edge axially spaced-aparts offer locking notch 6; Radially sliding of outer tube 1 is provided with a latch hook 7, and this latch hook 7 stretches in the groove 4, and its anterior coupler body 8 is positioned at locking edge 5 back sides; Latch hook 7 rear portions extend to the outside of outer tube 1 directly as button 9.And there is a flexible member to act on the front end face of latch hook 7, and force direction radially outwards drives, force the coupler body 8 on the latch hook 7 to embed locking notch 6 or the lock hole, constitute from the locking mechanism of locking edge 5 back sides effect with this from locking edge 5 back side contrapositions.

Shown in accompanying drawing 1～3, corresponding button 9 sets firmly a button cover plate 10 on the outer tube 1, and this button cover plate 10 is provided with button hole, and button 9 stretches out from button hole; And, the corresponding button hole block 11 of limiting on the described button 9, this positive stop 11 cooperates with the aperture of button hole is spacing.

The cross section of pipe 2 is shown in accompanying drawing 2, accompanying drawing 3 and accompanying drawing 7 in above-mentioned, and it is an aluminium section bar, and its tube chamber, gathering sill 4 and locking edge 5 all are integrated.

The operating process that enters released state from lock-out state is shown in accompanying drawing 4～6, and Fig. 4 is a lock-out state, and latch hook 7 is in upper, and coupler body 8 embeds in the locking notch 6.When entering released state, press the button 9, the pressure that latch hook 7 overcomes stage clip 19 moves down, and coupler body 8 breaks away from from locking notch 6, and state as shown in Figure 5; Pipe 2 in this moment is scalable, release-push 9 when the length of satisfying the demand, latch hook 7 is under the effect of stage clip 19, on move on the back side that is resisted against locking edge 5, can continue flexible interior pipe 2 this moment, adjust length, when coupler body 8 is aimed at next grade locking notch 6, can embed in the locking notch 6 automatically and reenter lock-out state.

Embodiment two: shown in accompanying drawing 8, a kind of dust collecting expansion pipe for vacuum cleaner, form by outer tube 1, interior pipe 2, pilot bushing 3 and locking mechanism, be with the difference of embodiment one: its unlocking operation mechanism is the lever type button structure, this structure mainly is made of a lever pressing plate 12, one end rotational support of described lever pressing plate 12 is on outer tube 1, and its other end is a push-botton operation portion 13, and directly extend on the middle part, the back side that is resisted against lever pressing plate 12 at the rear portion of described latch hook 7.Other structure repeats no more here with embodiment one.

Embodiment three: shown in accompanying drawing 9, a kind of dust collecting expansion pipe for vacuum cleaner, by outer tube 1, interior pipe 2, pilot bushing 3 and locking mechanism are formed, be with the difference of embodiment one: its unlocking operation mechanism is a pushing button structure, this structure is mainly by slide block 14, spring 15 and the push button cover plate 16 that is located on slide block 14 and the spring 15 constitute, outwards be provided with operating portion 17 on the slide block 14, slide block 14 relative outer tubes 1 are slidingly connected, act on respectively on the front and back of its glide direction a spring 15 is arranged, the central authorities at slide block 14 backs offer a V-type groove 18, the back side that is resisted against slide block 14 is directly extended at the rear portion of described latch hook 7, is slidingly matched with two side planes at slide block 14 back sides and the V-type groove 18 at middle part.Other structure repeats no more here with embodiment one.

The foregoing description only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the personage who is familiar with this technology can understand content of the present utility model and enforcement according to this, can not limit protection domain of the present utility model with this.All equivalences of doing according to the utility model spirit essence change or modify, and all should be encompassed within the protection domain of the present utility model.

Claims

1, a kind of dust collecting expansion pipe for vacuum cleaner, comprise outer tube [1], interior pipe [2], gliding movement targeting structure and locking mechanism, interior pipe [2] is inserted in the outer tube [1] and cooperates formation to be in axial sliding connection by gliding movement targeting structure, and interior pipe [2] is provided with the section of being slidingly connected between the outer tube [1], and seal is relative to be sealed, it is characterized in that locking mechanism is: the outer surface upper edge of interior pipe [2] is axially arranged with groove [4], be provided with locking edge [5] to the extension of cell body central authorities on this groove [a 4] two side or the sidewall, this locking edge [5] upper edge axially spaced-apart offers locking notch [6] or lock hole; Radially sliding of outer tube [1] is provided with a latch hook [7], and this latch hook [7] stretches in the groove [4], and its anterior coupler body [8] is positioned at locking edge [5] back side; The outside that latch hook [7] rear portion extends to outer tube [1] directly links to each other as button [9] or with operating mechanism on being located at outer tube [1]; There is a flexible member to act on the latch hook [7], and force direction radially outwards drives, force the coupler body [8] on the latch hook [7] to embed locking notch [6] or the lock hole, constitute from the locking mechanism of locking edge [5] back side effect with this from the contraposition of locking edge [5] back side.

2, dust collecting expansion pipe for vacuum cleaner according to claim 1, it is characterized in that: described gliding movement targeting structure cooperates formation by gathering sill and guide pad [21], described gathering sill and guide pad [21] are among both, one are located on the outer surface of interior pipe [2], and another person is located on the inwall of outer tube [1].

3, dust collecting expansion pipe for vacuum cleaner according to claim 2, it is characterized in that: be provided with a pilot bushing [3] between described outer tube [1] and the interior pipe [2], this pilot bushing [3] is fixed on an end of outer tube [1], guide pad [21] is set on the inwall of pilot bushing [3], groove [4] on the interior pipe [2] is as gathering sill, and guide pad [21] embeds to form in the groove [4] and is in axial sliding connection.

4, dust collecting expansion pipe for vacuum cleaner according to claim 1, it is characterized in that: the outside that described latch hook [7] rear portion extends to outer tube [1] is during directly as button [9], outer tube [1] is gone up corresponding button [9] and is set firmly a button cover plate [10], this button cover plate [10] is provided with button hole, and button [9] stretches out from button hole; And described button [9] is gone up the corresponding button hole block [11] of limiting, and this positive stop [11] cooperates with button hole is spacing.

5, dust collecting expansion pipe for vacuum cleaner according to claim 1, it is characterized in that: described operating mechanism is the lever type button structure, this structure mainly is made of a lever pressing plate [12], one end rotational support of described lever pressing plate [12] is on outer tube [1], its other end is as push-botton operation portion [13], the rear portion of latch hook [7] extend against or be hinged on the middle part of lever pressing plate [12].

6, dust collecting expansion pipe for vacuum cleaner according to claim 1, it is characterized in that: described operating mechanism is a pushing button structure, this structure mainly by slide block [14], spring [15] and be located at slide block [14] and spring [15] on push button cover plate [16] constitute, slide block [14] outwards is provided with operating portion [17], slide block [14] outer tube [1] relatively is slidingly connected, spring [15] is located on the glide direction of slide block [14], slide block [14] back is provided with an inclined-plane or V-type groove [18], the back side that is resisted against slide block [14] is extended at the rear portion of latch hook [7], cooperates with inclined-plane or V-type groove [18].

7, dust collecting expansion pipe for vacuum cleaner according to claim 1 is characterized in that: described flexible member is a stage clip [19], acts on latch hook [7] front end face or the rear axle shoulder end face.