CN217959944U - Telescopic pipe of dust collector and dust collector - Google Patents

Abstract

The utility model relates to the field of dust collector accessories, in particular to a telescopic pipe of a dust collector and the dust collector; a telescopic pipe of a dust collector comprises an outer pipe and an inner pipe arranged in the outer pipe in a penetrating way, wherein a locking mechanism is arranged between the outer pipe and the inner pipe, the inner pipe comprises a first chamber and a second chamber arranged on one side of the first chamber, and the section of the first chamber is circular; be provided with the sealed tube in the outer tube, sealed tube one end joint is inside connecting portion, and the first cavity of inner tube is inserted to the other end of sealed tube to be sliding seal with the cooperation mode of first cavity inner wall. An independent closed airflow channel is arranged in the telescopic pipe, so that the negative pressure in the dust collector is maintained, and the cleaning efficiency of the dust collector is ensured. The structure of the locking mechanism is optimized, so that the locking mechanism is simpler and clearer, and the assembly and the maintenance of products are facilitated. The control slide block on the locking mechanism can move in two directions along the axis, and the locking state of the telescopic pipe can be released no matter which direction the control slide block is pushed.

Description

Telescopic pipe of dust collector and dust collector

Technical Field

The utility model relates to the field of dust collector accessories, in particular to a telescopic pipe of a dust collector and the dust collector.

Background

At present, various telescopic pipes of dust collectors exist in the market and are used for connecting a pump of the dust collector and a brush head of the dust collector, the pump of the dust collector generates negative pressure in a sealed pipeline, and sundries and dust on the ground are sucked through the brush head. According to the material division, flexible pipe can be divided into hose and hard tube, and current flexible pipe generally adopts the reliability better, and the appearance is more pleasing to the eye hard tube, and in order to realize flexible function, need set up locking mechanical system on the hard tube.

The technical scheme has the following defects:

1. there are many different locking mechanisms on the market, some of which are complicated in structure and assembly and inconvenient to install and maintain, and when parts in the locking mechanism are damaged, it is difficult for a user to understand the technology thereof, so that maintenance is inconvenient, thereby affecting the normal use of the cleaner.

2. The telescopic pipe on the market usually can adopt the form control telescopic pipe of button to stretch out and draw back or get into the locking state, and the direction of push of button often is fixed, and the user often can not notice the direction of push of button when using, and when reverse control slider, the uncontrollable slider can bring uncomfortable sense to the user, thereby also causes the premature fatigue of material to damage under the condition of long-time use easily. Different people also have different use habits, and the direction-limiting buttons cannot meet the requirements of all users.

3. Although the hard tube has better reliability and more attractive appearance, the tightness is weaker than that of the hose, particularly at the joint of the inner tube and the outer tube, air leakage is easier, and negative pressure generated by a pump fan of the dust collector is damaged, so that the suction force of the dust collector is reduced, the cleaning work is difficult to complete, and the experience feeling of a user is influenced.

4. An additional conductive structure is usually required to be arranged inside the conductive telescopic pipe so as to ensure that the transmission of electric power can be maintained when the telescopic pipe is extended. In order to ensure the aesthetic appearance, the conductive structure is usually disposed inside the inner shrink tube. But also as a result of this, the conductive structure is subject to wear under prolonged use, thereby affecting the efficiency of the conduction.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a simple structure, the structure of being convenient for understand, handsome in appearance, the leakproofness is good, separates flexible pipe of dust catcher and dust catcher of electric wire and gas flow channel.

The utility model aims at realizing the following steps:

a telescopic tube of a dust collector comprises an outer tube and an inner tube, wherein the inner tube is arranged in the outer tube in a penetrating way, a locking mechanism is arranged between the outer tube and the inner tube,

the inner tube comprises a first chamber and a second chamber; the second chamber is arranged on one side of the first chamber;

the cross section of the first cavity is circular;

a sealing pipe is arranged in the outer pipe, and one end of the sealing pipe is fixed in the outer pipe and is in sealing fit with the inner wall of the outer pipe; the other end of the sealing tube is inserted into the first cavity of the inner tube, and the sealing tube is in sliding seal with the inner wall of the first cavity.

Preferably, the locking mechanism includes:

the locking rail is in a long strip shape and is arranged on the outer side of the inner tube; a plurality of gear grooves are arranged on the locking track;

the locking seat is arranged at the end part of the outer pipe; the locking seat is provided with a locking cavity which is positioned above the locking track;

the positioning block is arranged in the locking cavity and extends out of a certain length towards the locking track; the inner end of the positioning block can be embedded into the stop groove and the inner pipe is locked;

and the control sliding block is arranged on the locking seat and used for controlling the positioning block to stretch into or separate from the gear groove.

Preferably, the first cavity forms a dust collection channel, a sealing sleeve is arranged in the dust collection channel, and a connecting end of the sealing sleeve is clamped with the other end of the sealing tube;

the insert end of the seal sleeve is provided with a convex edge, and one side of the convex edge facing the insert direction is provided with a third inclined surface.

Preferably, the locking seat is also provided with a reset cavity, and a spring is arranged in the reset cavity; the surface of the reset cavity facing outwards along the axial direction of the telescopic pipe is provided with a groove;

and a pressing part is arranged on the inner side of the control slide block and can penetrate through the groove and push the spring.

Preferably, the second chamber is arc-shaped; a conductive channel is arranged in the second cavity, and the conductive channel and the conductive port of the insertion part are in the same radial direction;

one end of the inner pipe, which is connected with the outer pipe, is sleeved with a limiting sleeve and a separating sleeve, and the limiting sleeve is provided with a conductive through hole corresponding to the position of the conductive channel.

Preferably, the positioning block is in a convex structure, the extended part of the positioning block is formed into a stopping column, and the top end of the stopping column is positioned on two sides of the axial direction of the telescopic pipe to form a first inclined plane;

the other part of the positioning block is formed into a fixing plate, the top end of the fixing plate is formed into a top surface, and two sides of the top surface are formed into two inclined surfaces;

step parts are formed in the locking cavity, the through hole is positioned between the step parts on the two sides, and the stop column of the positioning block can penetrate through the through hole;

a stop beam is arranged on the inner side of the control slide block, and protruding ribs are arranged on two sides of the stop beam;

when the stop column of the positioning block is placed in the stop groove, the stop beam abuts against the top surface.

Preferably, a clamping portion is arranged on the inner side of the control slide block, and the control slide block is clamped on the locking mechanism through the clamping portion;

the locking mechanism is provided with a boosting surface, and the boosting surface is convenient for controlling the sliding block and completing clamping connection of the locking mechanism.

Preferably, the inner tube is provided with a rail groove, the locking rail is arranged in the rail groove, and the edges of two sides of the protruding part are sunken; when the locking track is put into behind the track groove, form the slide rail groove between track groove and the bellying, the inboard of locking seat is provided with the sliding part, the sliding part can be put into in the slide rail groove.

Preferably, the inner tube is provided with an insertion part, the outer tube is provided with a connecting part, and the insertion part is provided with an on-off button;

the opening and closing button is hinged to the hinged portion of the connecting piece, and the connecting piece is connected to the inserting portion.

A dust collector comprises the telescopic pipe of the dust collector.

Compared with the prior art, the utility model outstanding and profitable technological effect is:

1. a dust suction channel is formed in the inner tube of the telescopic tube, a sealing tube is arranged in the outer tube of the telescopic tube, the diameter of the dust suction channel is slightly larger than that of the sealing tube, one end of the sealing tube, which is positioned in the dust suction channel, is connected with a sealing sleeve, and a sliding seal is formed between the sealing sleeve and the dust suction channel. When the telescopic pipe extends, the sealing sleeve and the sealing pipe connected with the sealing sleeve are always positioned in the dust collection channel of the inner pipe to form a closed airflow channel, so that the negative pressure in the dust collector is maintained, and the cleaning efficiency of the dust collector is ensured.

2. The independent closed gas channel formed in the telescopic pipe separates the telescopic pipe from the gas channel, so that an extra sealing element is not required to be additionally arranged at the joint of the inner pipe and the outer pipe, the appearance of the product is ensured when the hard inner pipe and the hard outer pipe are used, the structural strength of the product is enhanced, and the sealing effect of the product is improved.

3. The utility model discloses optimized locking mechanical system's structure, made locking mechanical system's structure simplify more, clear, the part is made easily, is convenient for also accomplish the assembly of product. Non-professional person also can understand locking mechanical system's principle very easily, and when the part in the locking mechanical system appeared damaging, the user can guarantee flexible normal use of pipe through the mode of renewal part, makes the user need not to purchase new flexible pipe or wait for the maintenance rear can continue to use the dust catcher, has improved user's experience and has felt.

4. The control slide block on the locking mechanism can move in two directions along the axis, and the positioning block can be separated from the stop groove no matter which direction the control slide block is pushed, so that the telescopic pipe can be expanded or contracted to adapt to different use habits of users.

5. The positioning block is made of PM and other materials with certain oiliness, so that the positioning block has wettability, and when the control slide block moves, the positioning block is in contact separation with a stop beam in the control slide block, so that the positioning block can be conveniently separated from the stop groove, and the telescopic pipe can be contracted or expanded.

6. An independent conductive channel is formed in the inner tube of the telescopic tube, so that the conductive structure is prevented from contacting the outside, the loss of the conductive structure is reduced, the effect of protecting the conductive structure is achieved, and the service life of the conductive structure is prolonged.

Drawings

Fig. 1 is a structural view of the extension tube of the vacuum cleaner of the present invention in an undeployed state.

Fig. 2 is a structural diagram of the expansion pipe of the dust collector of the utility model under the expansion condition.

Fig. 3 is an exploded view of the present invention.

Fig. 4 is a cross-sectional view of the present invention.

Fig. 5 isbase:Sub>A sectional view of sectionbase:Sub>A-base:Sub>A in fig. 4.

Fig. 6 is an enlarged view of B in fig. 4.

Fig. 7 is a partial sectional view of the junction of the inner tube and the outer tube of the present invention.

Fig. 8 is an enlarged view of C in fig. 3.

Fig. 9 is an internal structure view of the control slider according to the present invention.

Fig. 10 is a partial view of the connecting portion of the present invention.

Reference numerals: 1. an outer tube; 6. a spring; 9. a dust collection channel; 10. a conductive channel; 11. a conductive via; 14. a button is turned on and off; 15. a connecting member; 16. a hinge portion;

2. an inner tube; 20. a first chamber; 21. a second chamber; 22. a limiting sleeve; 23. a separation sleeve; 24. a sealing tube; 25. a track groove; 26. sealing sleeves; 27. a convex edge; 28. a third inclined surface;

3. a locking seat; 31. a sliding part;

4. a locking mechanism; 41. a reset chamber; 42. a locking cavity; 43. a through hole; 44. a step portion; 45. a groove; 46. a boosting surface;

5. controlling the sliding block; 51. a clamping part; 52. a pressing section; 53. a stopper beam; 54. a projecting rib; 55. a pushing part;

7. positioning blocks; 71. a stopper post; 72. a fixing plate; 73. a first inclined surface; 74. a top surface; 75. a second inclined surface;

8. locking the track; 81. a stop groove; 82. a boss portion; 83. a slide rail groove;

12. a connecting portion; 121. a connecting part fixing sleeve; 122. a connecting portion conductive port; 123. a first friction part; 124. a sealing gasket;

13. an insertion portion; 131. an insertion part fixing sleeve; 132. an insertion portion conductive port; 133. a second friction part; 134. mounting grooves; 135. a clamping rib.

Detailed Description

The following are specific embodiments of the present invention, and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1-6, a telescopic tube of a vacuum cleaner comprises an outer tube 1 and an inner tube 2, wherein the inner tube 2 is inserted into the outer tube 1, a locking mechanism 4 is arranged between the outer tube 1 and the inner tube 2, and whether the telescopic tube is in a locking state is controlled by the locking mechanism 4.

The inner tube 2 includes a first chamber 20 and a second chamber 21, the second chamber 21 being disposed at one side of the first chamber 20, the first chamber 20 having a circular cross-section. The first chamber 20 is used for being connected with the inserting portion 13, a plurality of protruding second friction portions 133 are arranged at one end, connected with the first chamber 20, of the inserting portion 13, the inserting portion 13 is arranged in the first chamber 20 in a penetrating mode, the second friction portions 133 are tightly attached to the inner wall of the first chamber 20, and friction force generated by interaction between the second friction portions 133 and the first chamber 20 keeps the inserting portion 13 and the inner tube 2 connected stably. After the end of the insertion portion 13 connected to the first chamber 20 is completely inserted into the first chamber 20, the edge of the inner tube 2 is tightly attached to the insertion portion 13 to form a seal.

Because the insertion part 13 is connected with the brush head of the dust collector, the insertion part 13 is arranged in the first chamber 20, so that dust and dirt can be prevented from escaping to the outside of the dust collector at the joint of the insertion part 13 and the first chamber 20 to the maximum extent, and the trouble of needing secondary cleaning for a user is avoided. While additional sealing may also be added outside the junction of insert 13 and first chamber 20 to provide better sealing.

Be provided with sealed tube 24 in the outer tube 1, sealed tube 24 one end joint is in the inside of connecting portion 12 and with the sealed cooperation of the inner wall of connecting portion 12, is provided with seal ring 124 in the connecting portion 12 for guarantee the gas tightness of the junction of flexible union coupling dust catcher fan. The first friction part 123 is provided on the connection part 12, and has a structure similar to that of the insertion part 13, when the connection part 12 is connected to the outer tube 1, the first friction part 123 is attached to the inner wall of the outer tube 1, and the first friction part 123 and the outer tube 1 are maintained in a connected state by a friction force generated between the first friction part 123 and the inner wall of the outer tube 1.

The other end of the sealing tube 24 is inserted into the first chamber 20 of the inner tube 2 and is slidably engaged with the inner wall of the first chamber 20. The first chamber 20 and the connecting part 12 are connected by adopting a single sealing pipe 24, so that an independent closed gas channel is formed among the inserting part 13, the first chamber 20, the sealing pipe 24 and the connecting part 12, the air channel is isolated from the outside to the maximum extent, the internal negative pressure is maintained, and the dust collection efficiency of the dust collector is ensured.

As shown in fig. 3 to 8, the lock mechanism 4 includes:

a locking rail 8 which is long and is arranged outside the inner tube 2; the locking rail 8 is punched with a plurality of catching grooves 81 at the same interval.

The locking seat 3 is arranged at the end part of the outer tube 1; the locking socket 3 has a locking cavity 42, the locking cavity 42 being located above the locking track 8.

The positioning block 7 is arranged in the locking cavity 42, a through hole 43 is formed in the surface of the locking cavity 42 facing one side of the locking rail 8, the positioning block 7 extends out of the through hole 43 and extends out of the locking rail 8 for a certain length, and one extending end of the positioning block 7 can be embedded into the retaining groove 81.

The outer side of the inner tube 2 is provided with a locking track 8, the locking track 8 and the locking mechanism 4 are positioned in the same radial direction, and the locking of the telescopic tube is realized through the matching of the locking track 8 and the locking mechanism 4. When the positioning block 7 extends from the locking mechanism 4 and is placed in the catching groove 81, the locking mechanism 4 and the locking track 8 are clamped to each other, and the telescopic tube is in a locked state.

Control slider 5 sets up on locking seat 3 to control locating piece 7 stretches into or breaks away from and keeps off a position groove 81, the utility model discloses in, owing to adopt locating piece 7 to put into the locking form that keeps off in a position groove 81, so can specific restriction to control slider 5's direction of movement, as an optional embodiment, control slider 5 can move along the axis direction of stretch-draw pipe.

When the user pushes the control slider 5, the stop groove 81 is a trapezoidal groove, the area of the notch of the stop groove 81 is larger than that of the groove bottom, and the joint of the notch of the stop groove 81 and the protrusions 82 at the two sides is formed into a round angle, so that the positioning block 7 is conveniently separated from the stop groove 81, the positioning block 7 is not connected with the locking track 8, the locking state of the telescopic pipe is released, and the telescopic pipe can be extended or contracted.

As shown in fig. 4 to 6, the outer tube 1 and the inner tube 2 are tubes having an oval cross section in appearance, and the inner tube 2 is divided into a first chamber 20 having a circular cross section and a second chamber 21 having an arc-shaped cross section, wherein the first chamber 20 forms the dust suction passage 9. A sealing sleeve 26 is arranged in the dust collection channel 9, and the connecting end of the sealing sleeve 26 is clamped with the other end of the sealing tube 24, so that the dust collection channel 9 and the sealing tube 24 are connected into a whole to form a closed airflow channel, the internal negative pressure is convenient to maintain, and the cleaning efficiency of the dust collector is ensured.

The insertion end of sealing sleeve 26 is provided with a convex edge 27, and one side of convex edge 27 facing the insertion direction is provided with a third inclined surface 28. The sealing sleeve 26 may be made of a material having elasticity, such as rubber, and the maximum diameter of the cross section of the flange 27 is slightly larger than the inner diameter of the dust suction passage 9.

When the sealing sleeve 26 connected with the upper sealing tube 24 is placed in the dust suction channel 9, the three inclined surfaces 28 on the flanges 27 are abutted against the dust suction channel 9, so that the axial force is resolved into radial component force, the insertion end of the sealing sleeve 26 is contracted, and the sealing sleeve 26 can enter the dust suction channel 9.

When the sealing sleeve 26 enters the dust suction channel 9, the insertion end of the sealing sleeve 26 loses axial stress in the dust suction channel 9, so that the sealing sleeve 26 has a tendency of recovering to the original shape. Because the maximum diameter of the section of the flange 27 is slightly larger than the inner diameter of the dust suction channel 9, the flange 27 is tightly attached to the inner wall of the dust suction channel 9 to form a seal, and is fixed by the friction force generated between the sealing sleeve 26 and the inner wall of the dust suction channel 9.

Since the sealing sleeve 26 forms a sliding seal with the suction channel 9, the sealing sleeve 26 is restrained by the sealing tube 24 so as not to move with the extension of the inner tube 2 from the outer tube 1 when the inner tube 2 is withdrawn from the interior of the outer tube 1. At the same time, however, the spacer 23 and the stop collar 22 limit the extension length of the inner tube 2, so that the sealing sleeve 26 cannot be separated from the inner tube 2 due to the excessively long extension of the inner tube 2.

Through the sealing formed between the dust suction channel 9 and the sealing sleeve 26, an independent closed airflow pipeline can be formed between the dust suction channel 9 and the sealing pipe 24, so that the negative pressure generated by a pump of the dust collector is maintained, and the efficiency of the dust collector for cleaning sundries is ensured. And the junction of outer tube 1 and inner tube 2 no longer need to set up extra sealing member, just can reach good sealed effect to can use stereoplasm outer tube 1 and inner tube 2 to provide good structural strength and pleasing to the eye appearance, improve the poor condition of leakproofness of the flexible pipe of stereoplasm in the past.

As shown in fig. 5 to 8, the spring 6 is provided in the return chamber 41, and the surface of the return chamber 41 is formed with a groove 45, and since the return chamber 41 is provided on both sides of the lock chamber 42 in the direction of the axis of the telescopic tube in this embodiment, the groove 45 is provided on the surface of the return chamber 41 on the side away from the lock chamber 42 in the direction of the axis of the telescopic tube, and the width of the groove 45 is smaller than the diameter of the end surface of the spring 6, so that the spring 6 is confined in the return chamber 41 and cannot be detached from the groove 45.

The control slider 5 is provided with a pressing portion 52 on the inside, and the pressing portion 52 can pass through the groove 45 and press the spring 6, thereby allowing the control slider 5 to move. The spring 6 can accumulate elastic potential energy, and when the user does not push the control slider 5 any more, the spring 6 can reset the control slider 5.

When the control slider 5 moves for a certain distance, the positioning block 7 can be separated from the blocking groove 81, the outer pipe 1 and the inner pipe 2 are not connected, the inner pipe 2 can move in the outer pipe 1, and at the moment, the locking state of the telescopic pipe is released, so that the telescopic pipe can extend or contract.

When the positioning block 7 is placed into the blocking groove 81 again, the spring 6 can push the control slide block 5 to reset, meanwhile, the positioning block 7 is clamped again and fixed in the blocking groove 81, the outer pipe 1 and the inner pipe 2 are clamped with each other again, and the telescopic pipe enters a locking state.

In the present embodiment, the lock mechanism 4 is composed of two return cavities 41 and a lock cavity 42, the two return cavities 41 are disposed on both sides of the lock cavity 42 in the axial direction of the telescopic tube, and thus the control slider 5 is restricted to move only in the axial direction of the telescopic tube. When the user pushes the control slider 5 from any direction along the axial direction of the telescopic tube, the locking state of the locking mechanism 4 can be released, so that the use habits of different users can be met.

The middle position of the top end of the control slide block 5 protrudes outwards, the smooth curved surface formed by the two sides of the protrusion becomes the pushing part 55, so that a user can push the control slide block 5 conveniently, and the comfort degree of the user during use is also improved due to the smooth curved surface structure of the pushing part 55.

As shown in fig. 3-6, the insertion portion conductive port 132 is connected to the insertion portion 13, the connection portion conductive port 122 is connected to the connection portion 12, and the insertion portion conductive port 132 and the connection portion conductive port 122 are connected by a conductive mechanism, which is used to maintain the current flowing between the insertion portion conductive port 132 and the connection portion conductive port 122, and is provided with an extension portion for continuously maintaining the current connection when the extension tube is extended.

The outside cover of insertion portion 13 is equipped with the fixed cover of insertion portion 131, and insertion portion 13 is connected with inner tube 2 through the fixed cover of insertion portion 131, and the outside cover of connecting portion 12 is equipped with the fixed cover of connecting portion 121, and connecting portion 12 is connected with outer tube 1 through the fixed cover of connecting portion 121.

The second chamber 21 in the inner tube 2 is arc-shaped, the second chamber 21 is formed with a conductive channel 10, the conductive channel 10 and the conductive port 132 of the insertion part are in the same radial direction, when the insertion part 13 is connected with the dust collector, the conductive port 132 of the insertion part is also connected with the motor of the dust collector, and the current is transmitted to the brush head of the dust collector through the conductive structure in the telescopic switch to drive the brush head of the dust collector to work.

The conductive path 10 may also provide a separate area for a conductive structure that connects the insertion portion conductive opening 132 and the connection portion conductive opening 122 so that current can be supplied to the brush head of the cleaner through the extension tube. The conductive channel 10 is separated from the dust absorption channel 9, so that the conductive structure can be prevented from being abraded by dust and sundries in the dust absorption channel 9, meanwhile, the conductive structure is prevented from being in contact with the outside, the loss of the conductive structure is reduced, and the service life of the conductive structure is prolonged.

One end of the inner tube 2 connected with the outer tube 1 is provided with a limiting sleeve 22 and a separating sleeve 23, and the limiting sleeve 22 is provided with a conductive through hole 11 corresponding to the position of the conductive channel 10.

The limiting sleeve 22 at the joint of the outer tube 1 and the inner tube 2 is provided with a conductive through hole 11, and the area of the conductive through hole 11 is smaller than that of the conductive channel 10. When the telescopic tube is unlocked and starts to extend, the small conductive through hole 11 can limit the movement of the conductive structure, limit the main body of the conductive structure in the conductive channel 10, and ensure that the extension part of the conductive structure slowly extends, so as to ensure that the electrifying effect can be continuously ensured after the length of the telescopic tube is extended. Meanwhile, the function of fixing the conductive structure can be achieved, and even if the conductive structure is in a hard telescopic pipe of the dust collector, the conductive structure can still be damaged when the telescopic pipe collides, and the damage of the conductive structure can be effectively avoided by fixing the position of the conductive structure and reducing the displacement of the conductive structure.

The separating sleeve 23 sleeved on the inner pipe 2 is used for separating the outer pipe 1 and the inner pipe 2, so that a certain gap is reserved between the outer pipe 1 and the inner pipe 2, and the outer pipe 1 is not directly contacted with the inner pipe 2. When the telescopic pipe is extended or contracted, the outer pipe 1 and the inner pipe 2 can not be rubbed, more comfortable use experience can be brought when the telescopic pipe is extended or contracted, unnecessary abrasion can be reduced between the outer pipe 1 and the inner pipe 2, and the service life of the telescopic pipe is shortened.

When the telescopic tube is unfolded, because the separating sleeve 23 and the limiting sleeve 22 are sleeved on the outer side of the inner tube 2, the edge of the separating sleeve 23 is turned outwards to form a flanging which is abutted against the edge of the outer tube 1. Because the edge of the separating sleeve 23 is abutted against the edge of the outer pipe 1 and the limiting sleeve 22 is arranged on the edge of the inner pipe 2, after the telescopic pipe extends to a certain length, the separating sleeve 23 and the limiting sleeve 22 are abutted against each other, and the limiting sleeve 22 limits the separating sleeve 23 at the moment, so that the maximum length of the inner pipe 2 which can extend from the outer pipe 1 is limited, and the telescopic pipe cannot be extended continuously.

The maximum length of the inner tube 2 extending out of the outer tube 1 is limited, so that the conductive structure arranged in the telescopic tube can be protected, and the conductive structure cannot be damaged due to excessive extension. Secondly, the situation that the sealing sleeve 26 is pulled out of the dust suction channel 9 can be avoided, so that negative pressure inside the dust collector is damaged, and even the sealing tube 24 is possibly separated from the dust suction channel 9, the normal use of the dust collector is influenced, and inconvenience is brought to users.

As shown in fig. 6-9, the positioning block 7 is in a shape of a "convex", an extended portion of the positioning block 7 is formed as a stopper 71, and the top end of the stopper 71 is located on both sides of the axial direction of the telescopic tube to form a first inclined surface 73. Because the retaining groove 81 is a trapezoidal groove, when the stop column 71 is placed in the retaining groove 81, a certain force is applied, and the positioning block 7 can be separated from the retaining groove 81 through the first inclined surface 73.

The other part of the positioning block 7 is formed as a fixing plate 72, the top end of the fixing plate 72 is formed as a top surface 74, and both sides of the top surface 74 are formed as second inclined surfaces 75. Stepped parts 44 are formed in the locking cavity 42, the through hole 43 is located between the stepped parts 44 on both sides, and the stop column 71 of the positioning block 7 can pass through the through hole 43.

The locking cavity 42 is internally shaped to fit the positioning block 7 such that the positioning block 7 can only move in the vertical direction and not in the horizontal direction. The step 44 can limit the position of the positioning block 7 in the locking cavity 42, and ensure that the control slider 5 can abut against the top surface 74 of the fixing plate 72 while the stop column 71 can extend into the stop groove 81.

When the stop column 71 is located in the stop groove 81, the control slider 5 abuts against the top surface 74, and by limiting the movement of the positioning block 7 in the vertical direction, the fixation of the positioning block 7 and the locking between the outer tube 1 and the inner tube 2 are achieved.

The inner side of the control slider 5 is provided with a stop beam 53, the two sides of the stop beam 53 are provided with protruding ribs 54, when the positioning block 7 is placed into the stop groove 81, the stop beam 53 will abut against the top surface 74 of the positioning block 7 to limit the movement of the positioning block 7, thereby realizing the fixation of the positioning block 7.

The side surfaces of the protruding ribs 54 at both sides of the stopper beam 53 are inclined surfaces, and when the control slider 5 is pushed, a certain space is left between the edge of the locking mechanism 4 and the inner wall of the control slider 5, so that the control slider 5 can move relative to the locking mechanism 4, and the pressing portion 52 enters the reset chamber 41 along with the movement of the control slider 5.

As the control slider 5 is moved, the stop beam 53 is gradually released from the top surface 74, and the positioning block 7 can be displaced in the vertical direction since the top surface 74 is no longer restrained by the stop beam 53. At this time, the locking seat 3 is pushed to enable the locking rail 8 and the positioning block 7 to relatively displace, and the positioning block 7 is made of oil materials such as PM and the like, so that the positioning block 7 has certain wettability, and when the inclined surface one 73 at the top end of the stop column 71 is in contact with two sides of the stop groove 81, certain lubrication can be provided, and the stop column 71 can be conveniently separated from the stop groove 81. And with the continuous movement of the locking track 8, the stop column 71 of the positioning block 7 moves along the inclined surface of the stop groove 81 until being extruded out of the stop groove 81 finally, and the locking state between the outer pipe 1 and the inner pipe 2 is released, so that the telescopic pipe can be stretched or contracted.

In another application method, the positioning block 7 and the stop groove 81 can be separated by gravity. When the top surface 74 of the positioning block 7 is separated from the stopper beam 53 of the control slider 5 by directing one side of the control slider 5 toward the ground, the stopper column 71 of the positioning block 7 is freely separated from the through hole 43 by gravity, and the locked state between the outer tube 1 and the inner tube 2 is released.

Because the stop beam 53 extends downwards from the top end of the control slider 5, the arrangement of the protruding rib 54 can increase the structural strength of the control slider 5, and avoid the occurrence of fracture of the stop beam 53, thereby preventing the position of the positioning block 7 from being limited and affecting the normal use of the dust collector. In some cases, when the positioning block 7 is hard to enter the locking cavity 42 again, the inclined edge of the protruding rib 54 may cooperate with the second inclined surface 75 of the positioning block 7 to split the horizontal pushing force into a vertical component force, so as to push the positioning block 7 back into the locking cavity 42.

As shown in fig. 8 and 9, a clamping portion 51 is arranged on the inner side of the control slider 5, and the control slider 5 is clamped on the locking mechanism 4 through the clamping portion 51;

the locking mechanism 4 is provided with a boosting surface 46, the boosting surface 46 is convenient for controlling the sliding block 5 and the locking mechanism 4 to complete clamping, and the clamping parts 51 correspond to the boosting surface 46 in position one to one. When it is necessary to connect the control slider 5 to the lock mechanism 4, the control slider 5 is placed on the lock mechanism 4 from above with the catching portion 51 abutting on the pushing-assist surface 46. At this time, when the control slider 5 is pressed from above, the vertical downward force is decomposed into a horizontal force and a vertical force by the aid of the boosting surface 46, the control slider 5 keeps a downward movement tendency by the vertical force, and the horizontal force pushes the engaging portion 51 to deform and expand the control slider 5. When the engaging portion 51 is disengaged from the push-up surface 46, the control slider 5 is not forced to return to its original shape, and the engagement between the locking mechanism 4 and the control slider 5 is completed.

As shown in fig. 3 to 6, the inner tube 2 is provided with a rail groove 25, the locking rail 8 is arranged in the rail groove 25, both side edges of the locking rail 8 are recessed, and a protrusion 82 is formed in the middle of the locking rail 8; when the locking rail 8 is placed in the rail groove 25, a rail groove 83 is formed between the rail groove 25 and the protrusion 82, the sliding portion 31 is disposed inside the locking base 3, and the distance between the sliding portions 31 is slightly greater than the width of the protrusion 82, so that the sliding portions 31 can be placed in the rail groove 83.

Because a user needs to use a hand to exert force when expanding or contracting the telescopic tube, and a palm inevitably generates component force in the radial direction when exerting force, if the locking track 8 is influenced by the component force in the radial direction for a long time, the locking track 8 is easily deformed or the stop groove 81 cannot be matched with the positioning block 7, so that the outer tube 1 and the inner tube 2 of the telescopic tube cannot be locked, and the normal use of the dust collector is influenced.

The sliding part 31 is placed in the sliding rail groove 83, which not only can play a role of positioning the locking seat 3, but also has a larger contact area between the sliding part 31 with a certain length and the outer tube 1 and the inner tube 2, thereby effectively reducing the damage of the radial component force generated by the palm to the locking rail 8.

As shown in fig. 10, the inner tube 2 is provided with an insertion portion 13, the outer tube 1 is provided with a connection portion 12, the insertion portion 13 is provided with an open/close button 14, the open/close button 14 is hinged on a hinge portion 16 of a connection member 15, and the connection member 15 is connected on the insertion portion 13.

The connecting part 12 is used for connecting a brush head of a dust collector, and a sealing washer 124 is arranged in the connecting part to ensure the sealing performance of the connecting part, maintain the internal negative pressure and ensure the working efficiency of the dust collector.

The insertion portion 13 is used to connect with a pump and other devices of the cleaner, and the clamping rib 135 may be inserted into a corresponding clamping groove to provide an additional supporting force to ensure the strength of the connection. The quick separation of the telescopic tube from the cleaner can be achieved by means of an on-off button 14 provided on the insertion portion 13.

The opening and closing button 14 is hinged to the hinge portion 16 of the connecting member 15, and the connecting member 15 is disposed in the mounting groove 134 of the insertion portion 13.

Since the open/close button 14 can control the connection between the insertion portion 13 and the vacuum cleaner pump, the open/close button 14 itself needs to bear a certain load, which may cause damage to the hinge portion 16, thereby affecting the connection of the telescopic tube, and possibly causing inconvenience to the user in using the vacuum cleaner.

The hinge part 16 is arranged on the connecting piece 15, and when the hinge part 16 is damaged and can not be used continuously, the telescopic pipe can be maintained by replacing the connecting piece 15, so that the telescopic pipe can be used continuously.

A dust collector comprises the telescopic pipe of the dust collector.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model should be covered within the protection scope of the utility model.

Claims (10)

1. A telescopic pipe of a dust collector comprises an outer pipe (1) and an inner pipe (2), the inner pipe (2) is arranged in the outer pipe (1) in a penetrating way, a locking mechanism (4) is arranged between the outer pipe (1) and the inner pipe (2), and the telescopic pipe is characterized in that,

the inner tube (2) comprising a first chamber (20) and a second chamber (21); the second chamber (21) is arranged on one side of the first chamber (20);

the first chamber (20) is circular in cross-section;

a sealing pipe (24) is arranged in the outer pipe (1), one end of the sealing pipe (24) is clamped in the connecting part (12) and is in sealing fit with the inner wall of the connecting part (12); the other end of the sealing tube (24) is inserted into the first chamber (20) of the inner tube (2) and is in sliding sealing fit with the inner wall of the first chamber (20).

2. A suction cleaner telescopic tube according to claim 1, characterized in that the locking mechanism (4) comprises:

the locking rail (8) is long and is arranged on the outer side of the inner tube (2); a plurality of stop grooves (81) are arranged on the locking track (8);

the locking seat (3) is arranged at the end part of the outer pipe (1); the locking seat (3) is provided with a locking cavity (42), and the locking cavity (42) is positioned above the locking track (8);

the positioning block (7) is arranged in the locking cavity (42), a through hole (43) is formed in the locking cavity (42) towards the locking track (8), and the positioning block (7) extends out of the through hole (43) for a certain length; the inner end of the positioning block (7) can be embedded into the stop groove (81) and lock the inner pipe (2);

and the control sliding block (5) is arranged on the locking seat (3) and is used for controlling the positioning block (7) to stretch into or separate from the retaining groove (81).

3. A telescopic tube for a vacuum cleaner according to claim 2, characterized in that the first chamber (20) forms a suction channel (9), a sealing sleeve (26) is arranged in the suction channel (9), and the connecting end of the sealing sleeve (26) is clamped with the other end of the sealing tube (24);

the inserting end of the sealing sleeve (26) is provided with a convex edge (27), and one side of the convex edge (27) facing the inserting direction is a third inclined surface (28).

4. A telescopic tube for suction cleaners according to claim 3, characterised in that the locking seat (3) is further provided with a return chamber (41), a spring (6) being provided in the return chamber (41); the surface of the reset cavity (41) facing to the outside along the axial direction of the telescopic pipe is provided with a groove (45);

the inner side of the control slide block (5) is provided with a pressing part (52), and the pressing part (52) can penetrate through the groove (45) and push the spring (6).

5. A suction cleaner telescopic tube according to claim 4, wherein the second chamber (21) is arc-shaped; a conductive channel (10) is arranged in the second cavity (21), and the conductive channel (10) and the insertion part conductive opening (132) are in the same radial direction;

one end cover that inner tube (2) with outer tube (1) is connected is equipped with stop collar (22) and separation cover (23), open on stop collar (22) have with electrically conductive through-hole (11) that electrically conductive passageway (10) position corresponds.

6. The telescopic tube for the dust collector as claimed in claim 5, wherein the positioning block (7) is in a convex structure, the extended part of the positioning block (7) is formed into a stop column (71), and the top end of the stop column (71) is positioned at two sides of the telescopic tube in the axial direction to form a first inclined surface (73);

the other part of the positioning block (7) is formed into a fixing plate (72), the top end of the fixing plate (72) is formed into a top surface (74), and two sides of the top surface (74) are formed into two inclined surfaces (75);

a step part (44) is formed in the locking cavity (42), the through hole (43) is positioned between the step parts (44) on two sides, and the stop column (71) of the positioning block (7) can pass through the through hole (43);

a stop beam (53) is arranged on the inner side of the control slide block (5), and protruding ribs (54) are arranged on two sides of the stop beam (53);

when the stop column (71) of the positioning block (7) is placed in the stop groove (81), the stop beam (53) abuts against the top surface (74).

7. The telescopic tube for the vacuum cleaner as claimed in claim 6, wherein a clamping portion (51) is arranged inside the control slider (5), and the control slider (5) is clamped on the locking mechanism (4) through the clamping portion (51);

the locking mechanism (4) is provided with a boosting surface (46), and the boosting surface (46) is convenient for controlling the sliding block (5) and the locking mechanism (4) to complete clamping.

8. The telescopic tube for vacuum cleaner according to claim 7, wherein the inner tube (2) is provided with a rail groove (25), the locking rail (8) is arranged in the rail groove (25), two side edges of the locking rail (8) are recessed, and a convex part (82) is formed in the middle of the locking rail (8); when locking track (8) are put into track groove (25) after, track groove (25) with form slide rail groove (83) between bellying (82), the inboard of locking seat (3) is provided with slide part (31), slide part (31) can be put into in the slide rail groove (83).

9. The telescopic tube for vacuum cleaners according to claim 8, characterized in that the inner tube (2) is provided with an insertion portion (13), the outer tube (1) is provided with a connection portion (12), the insertion portion (13) is provided with an on-off button (14);

the opening and closing button (14) is hinged to a hinge portion (16) of a connecting piece (15), and the connecting piece (15) is connected to the inserting portion (13).

10. A vacuum cleaner, comprising a vacuum cleaner telescopic tube according to claims 1-9.

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