CN201073281Y

CN201073281Y - Extension tube of vacuum cleaner

Info

Publication number: CN201073281Y
Application number: CNU2007200388879U
Authority: CN
Inventors: 沈盘根
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-06-25
Filing date: 2007-06-25
Publication date: 2008-06-18
Anticipated expiration: 2017-06-25

Abstract

The utility model relates to an retractable pipe for vacuum cleaners, comprising an inner pipe and an outer pipe. A slideway is arranged on the outer wall of the inner pipe, one end of the outer pipe is connected with a joint sleeve inserted in the outer pipe, and the joint sleeve is positioned outside the inner pipe; a first through hole is arranged on the joint sleeve, a locking mechanism is arranged in the first through hole, and a plurality of locking grooves are arranged at intervals on only one side of the slideway; the locking mechanism comprises a locking block with a boss matching with the locking groove in shape on only one side, a sliding block and a spring, when the locking mechanism is in the locking state, the boss is positioned in the locking grooves, and one side of the front part of the sliding block is propped on the sliding block; when the locking mechanism is in the unlocking state, a space where the boss can disengage from the locking grooves is positioned between the sliding block and the locking block. The utility model has the advantages that the inner pipe is not liable to bend and fracture, and the locking is firm and reliable.

Description

Dust collector expansion pipe

Technical field

The utility model relates to the architecture advances of the locking mechanism of a kind of dust collector expansion pipe, particularly a kind of dust collector expansion pipe.

Background technology

Dust catcher is the household appliances of using always, existing dust catcher, and its sweep-up pipe is generally telescopic, thereby is convenient to regulate length, utilizes holding of user.

The patent of invention of Chinese patent application numbers 200510038703.4 discloses a kind of dust collector expansion pipe, its structure is: telescoping tube comprises the interior pipe and the outer tube of mutual socket, have axial slide on the described outer wall of inner tube, the both sides of described axial slide are shaped on the 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, described locking mechanism mainly is made of elasticity V-arrangement locking plate, latch piece, described elasticity V-arrangement locking plate drops in the axial sliding sleeve 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.

The shortcoming of this dust collector expansion pipe is:

1, interior pipe generally is made of metal, both sides at axial slide are provided with U-lag, making not only needs to stamp out on inner pipe axial slide in processing, and need stamp out U-lag in the both sides of axial slide, like this, the deformation that metal takes place is more, pipe easy deformation even fracture in making.

2, because the V-arrangement locking plate is an integrative-structure, need lean on fork to insert in the V-arrangement locking plate when locking mechanism is in the lock state and strut two arms of V-arrangement locking plate, and make two arms of V-arrangement locking plate be stuck in the pair of U-shaped groove of axial slide both sides, leaning on fork to extract out from the V-arrangement locking plate during locking mechanism release makes the both arms of V-arrangement locking plate close up and break away from U-lag, like this after repeatedly using, the elasticity of V-arrangement locking plate two arms can become poor, makes that the locking of sweep-up pipe is reliable inadequately.

Summary of the invention

The purpose of this utility model formula provides a kind of interior pipe to be difficult for bending and to lock firm dust collector expansion pipe.

In order to achieve the above object, the technological means that the utility model adopts is: a kind of dust collector expansion pipe, it comprises interior pipe, be socketed in the outer tube in the described interior pipe outside, in described, offer the chute that extends along the direction of axis line of interior pipe on the outer wall of pipe, end at described outer tube is connected with fitting sleeve, described fitting sleeve is inserted in the outer tube and is positioned at the outside of pipe, on described fitting sleeve, offer first through hole, in described first through hole, be provided with locking mechanism, only side compartment of terrain at described chute is provided with a plurality of lock slots, described lock slots communicates with chute, described locking mechanism comprises lock dog, sliding shoe, spring, an only side of described lock dog has the lug boss that shape and lock slots match, described spring is arranged between the rear end and fitting sleeve of sliding shoe, one side and the lock dog of described sliding shoe front end are inconsistent, described locking mechanism has at least two duties: lock-out state and released state, when locking mechanism was in the lock state: described boss was in lock slots, and a side and the lock dog of described sliding shoe front portion offset; When locking mechanism was in released state, having between described sliding shoe and lock dog can be so that the space that lug boss breaks away from from lock slots.

Described telescoping tube also comprises pushing block, and described pushing block below is provided with projection, offers groove on described sliding shoe, offers second through hole on described outer tube, and described projection passes behind second through hole to small part and is positioned at groove.

Front end at described sliding shoe is provided with lead-in chamfered.

Offer screw on described fitting sleeve, offer third through-hole on described outer tube, a bolt is threaded mutually with screw after passing third through-hole.

Offer porosely in the rear end of described sliding shoe, an end of described spring is inserted in the hole.

Under lock-out state, spring pushing and pressing sliding shoe, one side and the lock dog of the front end of described sliding shoe offset, make lug boss on the lock dog stretch in the lock slots and offset with the madial wall of lock slots, thereby the relative position of pipe and outer tube locking in making can not telescopic moving, owing to sliding shoe tightly is inserted between lock dog and the fitting sleeve, therefore locking is very firm, even the phenomenon that outer tube and interior pipe get loose mutually can not appear in long-term the use yet.When needs are regulated the length of telescoping tube, promote sliding shoe to the spring direction, the lock slots of interior pipe chute one side will inwardly be pushed the lug boss of lock dog when managing in the pull from outer tube this moment, it is come closer and go out of lock groove gradually, this moment, locking mechanism was in released state, and interior pipe can slide with respect to outer tube, reached the purpose of regulating telescoping tube length, after mixing up, unclamp sliding shoe, under the effect of spring, locking mechanism will return lock-out state.

Because the utility model only is provided with lock slots in a side of chute, the deformation that pipe is taken place in the process of processing in making is less, and the possibility that the bending fracture takes place interior pipe reduces; In addition, because lock dog only is provided with the lug boss that matches with lock slots in a side, when locking mechanism was in the lock state, lug boss was stuck in the lock slots; And when locking mechanism is in released state, the lug boss groove that goes out of lock, deformation does not all take place in lug boss under the locking and unlocking two states, and not firm situation can not appear locking in long-term the use yet.

Description of drawings

Accompanying drawing 1 is the structural representation of the utility model embodiment;

Accompanying drawing 2 is the schematic top plan view of the utility model embodiment (removing pushing block and outer tube);

Accompanying drawing 3 is the schematic diagram of interior pipe;

Schematic diagram when accompanying drawing 4 is in the lock state for locking mechanism;

Schematic diagram when accompanying drawing 5 is in released state for locking mechanism;

Accompanying drawing 6 is inserted in the schematic diagram in the hole of lock dog rear end for an end of spring;

Wherein: 1, outer tube; 2, interior pipe; 3, fitting sleeve; 4, locking mechanism; 5, pushing block; 6, bolt; 7, space; 11, second through hole; 12, third through-hole; 21, chute; 22, lock slots; 31, first through hole; 32, screw; 41, lock dog; 42, sliding shoe; 43, spring; 51, projection; 411, lug boss; 421, groove; 422, lead-in chamfered; 423, hole.

The specific embodiment

1-5 illustrates as accompanying drawing, a kind of dust collector expansion pipe, pipe 2 in it comprises, be socketed in the outer tube 1 in described interior pipe 2 outsides, in described, offer the chute 21 that extends along the direction of axis line of interior pipe 2 on the outer wall of pipe 2, end at described outer tube 1 is connected with fitting sleeve 3, described fitting sleeve 3 is inserted in the outer tube 1 and is positioned at the outside of pipe 2, on described fitting sleeve 3, offer first through hole 31, in described first through hole 31, be provided with locking mechanism 4, only side compartment of terrain at described chute 21 is provided with a plurality of lock slots 22, described lock slots 22 communicates with chute 21, described locking mechanism 4 comprises lock dog 41, sliding shoe 42, spring 43, an only side of described lock dog 41 has the lug boss 411 that shape and lock slots 22 match, described spring 43 is arranged between the rear end and fitting sleeve 3 of sliding shoe 42, one side and the lock dog 41 of described sliding shoe 42 front ends are inconsistent, described locking mechanism 4 has at least two duties: lock-out state and released state, when locking mechanism 4 was in the lock state: described lug boss 411 was positioned at lock slots 22, and a side and the lock dog 41 of described sliding shoe 42 front portions offset; When locking mechanism 4 was in released state, having between described sliding shoe 42 and lock dog 41 can be so that the space 7 that lug boss 411 breaks away from from lock slots 22.

Promote sliding shoe 42 more easily in order to make, described telescoping tube also comprises pushing block 5, described pushing block below is provided with projection 51, on described sliding shoe 42, offer groove 421, on described outer tube 1, offer second through hole 11, described projection 51 passes second through hole, 11 back to small parts and is positioned at groove 421, described pushing block 5 is positioned at the outside of outer tube 1, thus can promote pushing block 5 make sliding shoe 42 move control locking mechanism 4 between lock-out state and released state, carry out conversion.

In order to make the process of locking mechanism 4 when the release more level and smooth, front end at described sliding shoe 42 is provided with lead-in chamfered 422, see 4,5 signals of accompanying drawing, because when the front end of sliding shoe 42 is provided with lead-in chamfered 422, make when locking mechanism 4 transfers released state to by lock-out state, when the straight arrows direction of sliding shoe 42 in accompanying drawing 5 is mobile to the back-end, lock dog 41 is a lead-in chamfered 422 with sliding shoe 42 contacted positions, and lock dog 41 little by little moves in chute 21 along lead-in chamfered 422.

On described fitting sleeve 3, offer screw 32, on described outer tube 1, offer 12, one bolts 6 of third through-hole and pass third through-hole 12 back and be threaded mutually with screw 32.

See attached illustrated in Figure 7ly, offer porosely 423 in the rear end of described sliding shoe 42 that an end of described spring 43 is inserted in the hole 423, thereby makes spring 43 more tight with being connected of sliding shoe 42.

Under lock-out state, spring 43 pushing and pressing sliding shoes 42, one side and the lock dog 41 of the front end of described sliding shoe 42 offset, make lug boss 411 on the lock dog 41 stretch in the lock slots 22 and offset with the madial wall of lock slots 22, thereby the relative position of pipe 2 and outer tube 1 locking in making can not telescopic moving, because sliding shoe 42 tightly is inserted between lock dog 41 and the fitting sleeve 3, therefore locking is very firm, even the phenomenon that outer tube 1 and interior pipe 2 get loose mutually can not appear in long-term the use yet.When needs are regulated the length of telescoping tube, promote sliding shoe 42 to spring 43 directions, managed 2 o'clock in the pull this moment from outer tube 1, and the lock slots 22 of interior pipe chute one side will inwardly be pushed the lug boss 411 of lock dog 41, it is come closer and go out of lock groove 22 gradually, this moment, locking mechanism was in released state, and interior pipe 2 can slide with respect to outer tube 1, reaches the purpose of regulating telescoping tube length, after mixing up, unclamp sliding shoe 42, under the effect of spring 43, locking mechanism 4 will return lock-out state.

The foregoing description only is explanation technical conceive of the present utility model and characteristics; its purpose is to allow the personage that is familiar with this technology can understand content of the present invention and is implemented; 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 in the protection domain of the present utility model.

Claims

1. dust collector expansion pipe, it comprises interior pipe (2), be socketed in the outer tube (1) in described interior pipe (2) outside, in described, offer the chute (21) that extends along the direction of axis line of interior pipe (2) on the outer wall of pipe (2), end at described outer tube (1) is connected with fitting sleeve (3), described fitting sleeve (3) is inserted in the outer tube (1) and is positioned at the outside of pipe (2), on described fitting sleeve (3), offer first through hole (31), in described first through hole (31), be provided with locking mechanism (4), it is characterized in that: the only side compartment of terrain at described chute (21) is provided with a plurality of lock slots (22), described lock slots (22) communicates with chute (21), described locking mechanism (4) comprises lock dog (41), sliding shoe (42), spring (43), an only side of described lock dog (41) has the lug boss (411) that shape and lock slots (22) match, described spring (43) is arranged between the rear end and fitting sleeve (3) of sliding shoe (42), one side and the lock dog (41) of described sliding shoe (42) front end are inconsistent, described locking mechanism (4) has at least two duties: lock-out state and released state, when locking mechanism (4) when being in the lock state: described lug boss (411) is positioned at lock slots (22), and an anterior side and the lock dog (41) of described sliding shoe (42) offsets; When locking mechanism (4) when being in released state, having between described sliding shoe (42) and lock dog (41) can be so that the space (7) that lug boss (411) breaks away from from lock slots (22).

2. dust collector expansion pipe as claimed in claim 1, it is characterized in that: described telescoping tube also comprises pushing block (5), described pushing block below is provided with projection (51), on described sliding shoe (42), offer groove (421), offer second through hole (11) on described outer tube (1), described projection (51) passes second through hole (11) back to small part and is positioned at groove (421).

3. dust collector expansion pipe as claimed in claim 1 is characterized in that: the front end at described sliding shoe (42) is provided with lead-in chamfered (422).

4. dust collector expansion pipe as claimed in claim 1, it is characterized in that: on described fitting sleeve (3), offer screw (32), offer third through-hole (12) on described outer tube (1), a bolt (6) passes third through-hole (12) back and is threaded mutually with screw (32).

5. dust collector expansion pipe as claimed in claim 1 is characterized in that: offer porose (423) in the rear end of described sliding shoe (42), an end of described spring (43) is inserted in the hole (423).