CN101204309A - Suction tube for a vacuum cleaner - Google Patents

Abstract

The present invention provides a telescoping tube for dust cleaner suction catheter, the telescopic tube includes two tubes, an internal tube supports slat having a groove on the exterior surface, and an external tube includes a lock apparatus interacting with the groove mouth of the slat of the said internal tube, the internal tube includes a chamber of the slat having groove, characterized in that the internal tube includes onflow reduction element of the chamber.

Description

The suction tube that dust catcher is used

Technical field

[01] the present invention relates to dust catcher and the particularly household appliance technical field of pull-alongs dust catcher, and the rigid pipe that is particularly related to this dust catcher of equipment.

Background technology

[02] in fact, described dust catcher generally includes and is installed on the wheel so that its casing that moves on the ground.Described casing Feng Naneng produces electric fan, and the device for separation of waste of suction streams, described separator or carry out rubbish by filter membrane or the inertia separator by being called " not having bag " formula or any equivalent device and separate.

[03] casing of described dust catcher is connected on suction joint such as the inhalator by different pipes, and described different pipes generally include the rigid pipe that is connected with inhalator, and are connected rigid pipe to casing and be convenient to operate the flexible pipe of inhalator.

What [04] layout of described dust catcher was the most common is: vertically settle rigid pipe by suitable slideway along one of box body wall.Yet the length of rigid pipe also causes bulky.

[05] knows a kind of dust catcher by file DE 4101049, it has two suction tubes, interior tube body has the chamber holding the locking parts, and described locking parts are installed on the control device that outer tube body supports, thereby regulate the final lengths that two bodys have.Yet the chamber of being made by the described pipe of local punching press in interior tube body stays rugged surface in the inside of interior tube body, and this can cause upsets flowing of suction streams, thereby can produce noise especially.

[06] known a kind of improvement to this principle from file WO 01/15591, described file propose to make a vertical flat part on interior tube body, so that lay the bar rule spare (regle) that has groove, its energy locking is by the control parts of outer tube body supporting.Certainly, although after this pipe is inner owing to do not have bossing to help to suck the smoothness of air to flow, flows and so reduce the noise that produced but still can further improve.

Summary of the invention

[07] therefore, purpose of the present invention proposes a kind of especially quietly suction tube device exactly, and does not lower the ease of use of this class configuration.Another object of the present invention is to improve taking in of dust catcher.

[08] realizes the present invention by the suction tube that is used for pipe of duster, described suction tube comprises two bodys, interior tube body supports the louver boards that has groove on its outer surface, and outer tube body comprises the locking parts, described locking parts can interact with the notch of the louver boards of described interior tube body, described interior tube body comprises admits the described chamber that has the louver boards of groove, it is characterized in that, described interior tube body comprises that place, chamber turbulent flow reduces parts.

[09] therefore, the present invention is intended to reduce to be located at the turbulent flow that the chamber caused in the air flow duct.The reducing of described turbulent flow can make flows smoothly, and this has just reduced the aerodynamics noise by described change portion section the time.

[10] according to first embodiment of the present invention, place, described chamber turbulent flow reduces parts and is made of the rake of making on the leading section in the chamber of described interior tube body.In fact, because recess is realized in described chamber in the inner section of air flow duct, thereby should make it milder, with quiet as far as possible.

[11] angle of the axis of described rake and described interior tube body formation is preferably less than 30 °, so that a too precipitous proparea can not occur.

[12] advantageously, at least a portion of described rake is from the member that is additional on the described interior tube body.

[13] advantageously, the leading section of described rake laterally is configured to arc sections, so also allows side direction not have and impacts ground local derviation portion of air stream, and also allow to avoid the preceding shock wave that produces by described chamber the time.

[14] according to described feature, in order to have good local derviation efficient, the radius value of described arc sections is at least a half width in described chamber.

[15] second embodiment according to the present invention, place, described chamber turbulent flow reduce parts and are made of the body that covers in the chamber in the described interior tube body, and the described body that covers covers this chamber by the member that covers described chamber by the fore-and-aft plane that is parallel to described interior tube body axis.This embodiment is easy to implement, and is easy to adapt to the different graphic situation that is run into.

[16] advantageously, describedly cover the edge that member laterally extends to described interior tube body.Therefore the inner surface of pipe is perfectly smooth, so just helps smooth flowing.

[17] advantageously, the described member that covers is connected to one at its leading section and has the member of rake, so that can not produce head-on crash with inhaled air.

[18] according to one embodiment of the present invention, at least a portion of the described member that has a rake is from the member that is additional on the described interior tube body.When described member had another function, this modification had good especially advantage because this moment it play a part two kinds different.Described additional member especially can be the sealing ring that seals with described outer tube body.

[19] therefore this member extends with the truncated cone form to outer tube body from interior tube body, can guarantee sealing with the periphery flange that outer tube body slightly closely contacts.By proposing the rake part that this member comprises above-mentioned definition, the fluid connection between outer tube body and the interior tube body improves, because avoided the recess that may exist relevant with different component like this.

[20] according to another implementation of the invention, the described member of rake that has is from the described member that covers.When this member is molded when forming, described embodiment is easy to.

[21] purpose of the present invention also is in order to protect dust catcher; described dust catcher has main body; electric fan and device for separation of waste are contained in the inside of described main body; described main body is connected with the suction joint by aspiration; described aspiration comprises at least one rigid pipe; described suction joint arrangement is characterized in that in the end of described rigid pipe the part of described rigid pipe is the assembly according to each suction tube in the above-mentioned feature.

[22] advantageously, described rigid pipe has articulated elements at half length place of this rigid pipe substantially, thereby allows tube portion to rotate about 180 ° relative to another tube portion, and described rotation is to carry out in the plane that is parallel to described body axis.Not only shorten the length of rigid pipe, but also one tube portion folding is got up by the junction by suction tube, the size of such pipe thereby reduce greatly, this makes taking in of dust catcher compacter and simpler.

[23] according to this feature, described seal member is arranged between described two tube portions; And described articulated elements is associated to locking device, and described locking device is used for by described two tube portions are locked these two tube portions to fetching.

[24] two of rigid pipe connected head-to-tail connections of tube portion have avoided one of two tube portion to carry out big overlapping in another, or have avoided in the fracture of the cross section at articulated elements place, and these two kinds of embodiments all are noise sources.

[25] advantageously, are assemblies as previously defined two tube portions by the suction tube one of at least of the feature of firm description.

Description of drawings

[26] by following description, the accompanying drawing with reference to the present invention represents non-limiting example will provide other features and advantages of the present invention.

[27] Fig. 1 is a part, and the perspective view of dust catcher inhalator according to dust catcher casing of the present invention and different suction tubes.

[28] Fig. 2 is in the detailed perspective plan view of articulated elements between two tube portions before the assembling.

[29] Fig. 3 and Fig. 4 are the detailed perspective plan view of articulated elements between latter two tube portion of assembling.

[30] Fig. 5, Fig. 6 and Fig. 7 are the vertical views according to the slight perspective of rigidity suction tube of the present invention, the expanded position that described rigid pipe is in folding position, expanded position respectively and prolongs with a tube portion.

[31] Fig. 8 is first kind of embodiment of the present invention to Figure 13.Fig. 8 is the decomposition diagram that constitutes some element of suction tube.

[32] Fig. 9 is the plane Q by Fig. 8, and a tube portion is at the axial section at articulated elements place.

[33] Figure 10 is the enlarged drawing of Fig. 9 part.

[34] Figure 11 is the front view of a pipe part.

[35] Figure 12 is the profile by the axis H-H of Figure 11.

[36] Figure 13 is the detail drawing of Figure 12.

[37] Figure 14 is the perspective view of some part of dust catcher.

[38] Figure 15 is two the different perspective views of dust catcher at reception position with Figure 16.

[39] Figure 17 is a kind of enforcement modification of the present invention to Figure 26.Figure 17 is the decomposition diagram that constitutes some element of this modification.

[40] Figure 18 and Figure 19 are the corresponding front perspective view of interior tube body and the rear views of suction tube assembly.

[41] Figure 20 is the vertical view of interior tube body.

[42] Figure 21 is the profile along the axis K-K of Figure 20.

[43] Figure 22 and Figure 23 are the enlarged drawings of Figure 21 some parts.

[44] Figure 24 is the front view of interior tube body.

[45] Figure 25 is the profile along the axis L-L of Figure 24.

[46] Figure 26 is the detail drawing of Figure 25.

[47] Figure 27 is a kind of perspective view of implementing modification of articulated elements between two tube portions.

The specific embodiment

[48] as shown in Figure 1, illustrative example of the present invention relates to dust catcher 1, and this dust catcher has main body 2, in main body 2 electric fan is housed, and it allows to produce suction airstream from air intake 4.Between air intake 4 and electric fan, be furnished with filter.Described filter can be a filter bag, or no bagging apparatus a kind of inert type or the cyclone type.

[49] main body 2 of dust catcher also has motor control and power line winding mechanism 6 and 8, as in this dragging type dust catcher common.The potentiometer 10 that pumping power is regulated is also illustrated among the embodiment that is proposed.

[50] be mounted with handle 12 in the place ahead of main body of dust collector 2, described handle allows mobile main body of dust collector.Main body of dust collector 2 advantageously rests on the roller of being located at below the main body of dust collector 14, and described roller is as being more clearly visible to Figure 16 at Figure 14.

[51] air intake 4 is connected with rigid pipe 20 by flexible pipe 40, and flexible pipe does not show on Fig. 1, but has schematically showed on Figure 15 and Figure 16.

[52] being connected between flexible pipe 40 and the rigid pipe 20 is to be realized by a handle 22 that is commonly referred to crank (crosse), described handle allows guiding rigid pipe 20, the inhalator 24 of dust catcher is connected the end of rigid pipe 20, and described inhalator is as being to be able to more description in the patent application document of FR 0610265 at application number.Crank 22 has control air access to plant 23, be also referred to as gas and let out part, described device is as known in the art, and advantageously as at publication number is described in the patent application document of FR 2876569, and these two patent application documents have all been discussed reducing of in dust catcher noise especially.

[53] according to illustrative examples of the present invention, pipe 20 roughly has articulated elements 26 between half height and the two parts 200 and 300 at described pipe 20, and described tube portion 200 is connected with inhalator, and tube portion 300 is connected with crank 22 by linkage element 314.

[54] articulated elements 26 is illustrated in Fig. 2 in more detail in Fig. 4.Described articulated elements realizes that by the connection of two pipe boxes each pipe box is placed in the end of tube portion 200 and tube portion 300.

[55] therefore, pipe box 202 is round the end of tube portion 200.Described pipe box has can be along the unlocking knob key 206 of the radial direction activity of tube portion 200, described unlocking knob key is connected with hook spare 208, the power that hook spare 208 is being resisted spring leaf 210 is mounted, and described spring leaf 210 is tending towards stopping that unlocking knob key 206 moves towards the axis of tube portion 200.Described pipe box also has two holes 212 near hook spare 208, they help the assembling with second pipe box, and this will make an explanation hereinafter.

[56] according to an aspect of the present invention, described pipe box has the junction that is vertical protrusion 204 forms, and axis hole 205 is being opened near its free end place in the junction of described pipe box 202.Described junction is advantageously located at the opposite of hook spare 208.

[57] pipe box 302 is placed on the tube portion 300 and is the form of clip, and has hollow space in the outside of respective tube part, and described hollow space can be admitted vertical protrusion 204.Be shaft-like axle 305 and advantageously make with metal, this axle passes described hollow space along axis x-x ', so the turning cylinder of described two tube portions of axis x-x ' representative.

[58] described axle 305 is parallel to the vertical advancement of planar P of pipe 20 and inhalator 24, thereby is by direction r shown in Figure 1, carries out in perpendicular to the direction of this advancement of planar by the rotating opening junction.

[59] when these two pipe boxes of assembling, vertical protrusion 204 is placed in the hollow space of pipe box 302, and bar 305 is inserted in the axis hole 205 of projection 204.Bar is locked in the pipe box 302 then.

The sealing that connects between [60] two tube portions guarantees that by ring washer 216 this ring washer 216 is arranged in the recessed neck of tube portion 200 ends.The complementary recessed neck 316 of tube portion 300 ends strengthened to the maintenance of packing ring with connect sealing.

When [61] using dust catcher, the clip shape of pipe box 302 helps the intensity of articulated elements, because can increase the bending strength of articulated elements by clip guide hump 204, this can be used as replenishing the locking device of two special tube portions.

[62] in addition, as what Fig. 4 saw, pipe box 302 has tenon 312, and described tenon is arranged in the articulated elements opposite, and in energy two holes 212 in being located at pipe box 202 in place.

[63] in addition, as shown in Figure 9, dock after the position that axis hole 205 is increased relative to tube portion 200 ends can rotated by tube portion 200 and tube portion 300 and these two parts are tied.

[64] pipe box 302 also has and is used for the sealing 308 that cooperates with hook spare 208, to realize the locking of two tube portions.

[65] in addition, the following tube portion 200 that is connected with inhalator 24 is assemblies of two suction tubes, especially as seeing at Fig. 1 and Fig. 7, an outer tube body 250 is wherein arranged, and an interior tube body 260 is in this outer tube body slides within.

[66] notion of suction tube is known in the dust catcher field.Its principle is based on the notch of interior tube body 260, and described notch cooperates with the locking parts of the control device 214 that outer tube body is supported, so that regulate the length that two bodys have.

[67], aspect the extension type assembly of pipe quiet, done special effort according to the present invention.Therefore, interior tube body 260 has the chamber 261 that is flat on equivalent length (longueur significative), and this flat part is admitted the louver boards (r é glette) 262 that has groove, as shown in Figure 8.As representing by the profile of plane Q and the shown in Figure 9 of articulated elements also be shown that 266 of the relative locking slotted eyes of two bodys are implemented on the surface of louver boards 262, and do not have slug plate receiving compartment 261 or pass louver boards receiving compartment 261.Thus, except that the recess relevant with the chamber (d é crochement), the inner surface of interior tube body 260 is still smooth.

[68] one preferred implementation according to the present invention minimizes in order to make the turbulent flow relevant with described chamber, and the leading section 263 in this chamber advantageously along the axioversion of body 260, so that reduce to be inhaled into the impact of air, is avoided preceding impact simultaneously.

[69] enlarged drawing of the thin A of portion of expression on Figure 10 presentation graphs 9.Described enlarged drawing can show the angle [alpha] between rake and the body axis, thereby this angle studied, (lame d ' air) kink effect (effetde d é crochement) minimizes so that make the blast of rake and the junction of the cavity segment that is parallel to the body axis.According to the example that is proposed, described angle [alpha] is about 20 °.

[70] Figure 13 is the enlarged drawing of the thin B of portion of Figure 12, and Figure 12 represents the profile done along the axis H-H of Figure 11, and Figure 11 is the front view that is equipped with the body 260 of the louver boards 262 of trough of belt and control device 214.

[71] as on described Figure 12 and Figure 13, being seen, the leading section 263 in the described chamber 261 corresponding with the proparea, chamber of suction streams arrival is configured to arc sections 2630, so that further make the smoothness that flows, and therefore allow air leniently to pass through, minimize the turbulent flow that is produced from the both sides in chamber.

[72] in addition, the rear section 264 in chamber 261 also tilts and has arc sections 2640, as Fig. 9 and shown in Figure 12.

Therefore [73] when work, when suction tube and dust catcher casing couple together, and when dust catcher put into operation, air flow in the inhalator 24, entered in the outer tube body 250 before the interior tube body 260 of arrival extension type assembly then.Air stream one arrives the chamber 261 of louver boards, just is subjected to by rake and/or by the local derviation of the arc sections 2630 of chamber leading section 263.Figure 10 and Figure 13 represent a plurality of components of the popular journey of air of chamber leading section 263 vicinity respectively, promptly corresponding longitudinal component f and cross stream component g.Be easy to see that local derviation is gentle, and the interference of limit air power, and therefore limit the noise that is produced.

[74] Figure 17 to Figure 26 represents a kind of enforcement modification of the present invention.According to this modification, interior tube body 460 has the body that covers in the chamber 461 of admitting the louver boards 462 be provided with notch 466, and the described body that covers is placed in the body.The described body that covers is made up of bar rule spare 470, and described bar rule spare has the side that a flattened side and is furnished with contact, and described contact is equipped with fixing hole 472.

[75] described contact will be placed in the opening 467 in chamber 461, and to cover body in place on the chamber so that make.

[76] louver boards that has a groove also has opening 465, and described opening 465 overlaps with opening 467.The screw that does not show on some figure allows handle to cover body and louver boards is fixed on the chamber 461.Also can consider louver boards and cover body to be bonded on the chamber, this can be used as replenishing of the method for screwing or replaces the method for screwing.

[77] cover body and be attached on the chamber, so it can be made by the material with character that required function requires.In order not make the suction tube device too heavy, the example that is proposed has the molded plastics that form and covers body.

[78] after this, with reference to above given explanation, on its leading section, advantageously has rake at the body 460 inner bodies that cover that cover described chamber.Be easy to obtain described rake during molded components.

[79] yet, according to the modification of being introduced, described rake is from an additional member, in the case, described additional member is a sealing ring 480.In fact, described ring can be realized sealing between interior tube body 460 and outer tube body 250, especially referring to Fig. 1.

[80] therefore, sealing ring has periphery flange 486 at its free end, and as shown on Figure 26, described flange contacts with the inner rim of body 250, as shown in figure 21.

[81] illustrative example of enforcement modification according to the present invention, sealing ring has the inward flange 482 from this ring periphery part, and described inward flange extends to the end 474 that covers body always, so that constitute the slope of air stream usefulness, as previously described.

[82] Figure 18, Figure 21, Figure 22 and Figure 26, the particularly thin C of portion, D and E representative ring and the connection that covers body.

[83] ring advantageously is made of plastics, and inward flange 482 can have and is suitable for the multiple shape that makes the air levelling quiet.

[84] in fact, described edge by body axially on have constant gradient, or as shown in figure 26, radially have constant gradient from the assumed position M that is positioned at the ring periphery, the shape that this moment, described edge presented is corresponding to the ball chamber.

[85] pin 468 that is arranged in louver boards 462 ends is especially guaranteed environmental protection is held on the body, and described pin will be in place in the recess 484 of described ring.In addition, the end 474 that covers body also is designed between edge 482 and flange in place, has so just strengthened the maintenance to ring.

[86] the described another one importance that covers body can be clear that on Figure 18.In fact, describedly cover the edge that body extends transverse to body.Compare with Figure 13, described modification has been improved flowing of air, avoids the local derviation of air on the side, chamber, has therefore limited the danger of turbulization laterally owing to the increase of aggregate velocity.

[87] rear section that covers body also is provided with rake 476, and described rake forms when molded components, and spherical in shape.

[88] the quiet aspect of described extension type assembly and inhalator place and reduce to adapt at the noise that the gas of crank is let out the part place.

[89] as the of the present invention of firm description replenished, just as noted earlier, dust catcher take in optimization, but so that benefit from the folding configuration of rigid pipe 20 fully.

[90] therefore, as shown in Figure 14, tube portion 200 and outer tube body 250 in particular have coupling arrangement 230 near inhalator 24, and it is used for tube portion 200 is connected in main body of dust collector 2.Described coupling arrangement is the form of two elements, and these two elements are substantially parallel to each other and along the longitudinal axis of body orientation, described two elements are L-shaped.

[91] main body 2 has the recess 16 that is partly limited by sclerine, so that groove 18 to be set in its underpart, just having on the part of roller 14.

[92] described coupling arrangement is known, has provided its improved example by file FR 2650745.In described coupled type, L type element is in place in groove 18, thereby allows to deposit vertically rigid pipe.

[93] when the user wishes to take in its dust catcher, for example after using, there are three kinds of modes to make taking in of dust catcher compacter, described three kinds of modes are carried out and are regardless of order.

[94] a kind of mode is to reduce to manage 20 length by body 260 (460) is placed in body 250.For this reason, user's start-up control mechanism 214 is so that the parts of slotted eye 266 (466) associated of release and louver boards 262 (462) therefore allow body 250,260 (460) relatively freely to slide.

[95] another mode is that tube portion 300 is rotated about 180 ° with respect to tube portion 200.For this reason, the user pushes the unlocking knob key 206 of junction 26.So just hook spare 208 is discharged from sealing 308, and the rotation between permission tube portion 200 and the tube portion 300.Carry out described rotation by the user, and the side of the lock motivation part that locks by junction and the G that makes a concerted effort on the relative pipe 20 arranges, laterally carry out this rotation.This tube portion rotates permission, and 26 places fully open pipe in the junction.

[96] this moment two tube portions 200,300 that are arranged side by side.

[97] another mode be by with main body of dust collector 2 upset on its rear surface so that its lower surface vertically presents, and parts 230 are placed in the groove 18, body 250 is connected on the main body 2 of dust catcher.

[98] Figure 15 and Figure 16 represent the result of described three actions.Notice the highly compact of dust catcher this moment surprisingly,, thereby make whole height and size greatly reduce because be connected in the height of main body of dust collector in the rigid pipe 20 this moment.

[99] in addition in this position, dust catcher can easily move by handle 12, and needn't be at user's arm place operating crank, and needs operating crank lacking under the situation of rotating the junction.

[100] see as Figure 16, dust catcher can also become soon and can operate from its reception position, because only need grip crank 22, makes it rotate half-turn so that hook spare 208 is locked in the sealing 308, raise the integral body of such composition then, from groove 18, deviate from so that will connect parts 230.

[101] groove 18 is advantageously located near one of the sidewall of main body of dust collector, so that tube portion 200 can rotate about 180 °, particularly overslaugh tube portion 200 rotates about 180 ° for the handle retaining of avoiding crank is against main body of dust collector 2.

[102] the invention is not restricted to the embodiment introduced, and also comprise all equivalence techniqueses, particularly about rake shape, relevant digital value, and louver boards and cover the assembling mode of body.

[103] in addition, the articulated elements of two tube portions at the pipe box place can have multiple enforcement modification, improving when connecting two-part guiding, and/or to increase mechanism's life-span, protects holding element simultaneously.

[104] therefore, Figure 27 represents to implement when they connect when two tube portions a kind of modification of the hook of locking.

[105] principle is still rotated based on the lateral shaft 705 around pipe box 702, described pipe box 702 is placed on the tube portion and is the form of clip, and having hollow space in the outside of respective tube part, described hollow space can be admitted the vertical protrusion 604 of the pipe box 602 that is arranged on another tube portion.

[106] yet, to Fig. 4, on the pipe box 602 of the release parts 606 of the described lock hook spare of supporting control, the U-shaped rigidity folder 610 of preferable alloy system is avoided collision around described locking hook spare 608 to protect it with respect to Fig. 2.In fact, the same with Figure 16 with Fig. 3, Fig. 4 when two tube portions are opened as shown in figure 27, locking hook spare 608 is because it is in the position of tube portion open end projection, so be easy to fragmentation.Therefore be necessary to protect described hook spare in this position.

[107] therefore; the rigidity folder that is proposed does not have stress ground protection hook spare to avoid accidental collision or hook; because two tube portions are locking such enforcement as previously described at pipe box place; hook spare 608 cooperates with the sealing 708 of pipe box 702; when two tube portions were coupled together, a hollow space in described pipe box can hold described folder.

[108] in addition, such folder is by cooperating with a suitable hollow space in corresponding pipe box 702, when participating in two pipe boxes and connecting to the guiding and the centering of described two pipe boxes.

[109] in addition, not only in order when connecting, to improve guiding to two pipe boxes, and also the connection in order mechanically to strengthen forming like this, two rigidity tongue pieces 720 that relative junction is laterally arranged of described pipe box 702 supportings, these tongue pieces cooperate with sealing 620.

[110] therefore, when two tube portions were tied, tongue piece 720 was placed in the sealing 620, and prevented that two bodys from any distortion taking place or the bending of body occurs.Described device, as using tenon 312 and being illustrated in device on Fig. 4, articulated elements bends when avoiding dust catcher to use, and when using dust catcher, the G that makes a concerted effort trends towards opening articulated elements along this direction.

[111] in addition, though the assembly of suction tube only is used for one of tube portion, the present invention comprises that also two tube portions are embodiments of suction tube assembly.

Claims (16)

1. the suction tube that is used for pipe of duster, described suction tube comprises two bodys (250,260,460), interior tube body (260,460) support the louver boards (262,462) that has groove on its outer surface, and outer tube body (250) comprises locking parts (214), described locking parts can with the louver boards (262 of described interior tube body, 462) notch (266,466) interacts, described interior tube body (260,460) comprise the described louver boards (262 that has groove of admittance, 462) chamber (261,461)

It is characterized in that described interior tube body (260,460) comprises that chamber (261,461) locates turbulent flow and reduce parts.

2. suction tube according to claim 1 is characterized in that, described chamber (261) are located turbulent flow and reduced parts and be made of the rake of making on the leading section (263) in the chamber (261) of described interior tube body (260).

3. suction tube according to claim 2 is characterized in that, the angle (α) that the axis of described rake and described interior tube body (260) constitutes is less than 30 °.

4. according to claim 2 or 3 described suction tubes, it is characterized in that at least a portion of described rake is from the member that is additional on the described interior tube body (260).

5. each described suction tube in requiring according to aforesaid right is characterized in that the leading section of described rake (263) laterally is configured to arc sections (2630).

6. suction tube according to claim 5 is characterized in that, the radius value of described arc sections is at least a half width in described chamber.

7. suction tube according to claim 1, it is characterized in that, place, described chamber turbulent flow reduces parts and is made of the body that covers in the chamber (461) in the described interior tube body (460), and the described body that covers covers this chamber by the member (470) that covers described chamber (461) by the fore-and-aft plane that is parallel to described interior tube body (460) axis.

8. suction tube according to claim 7 is characterized in that, describedly covers the edge that member (470) laterally extends to described interior tube body (460).

9. suction tube according to claim 8 is characterized in that, the described member (470) that covers is connected to a member that has a rake at its leading section (474).

10. suction tube according to claim 9 is characterized in that, at least a portion of the described member that has a rake is from the additional member that is additional on the described interior tube body (460).

11. suction tube according to claim 10 is characterized in that, described additional member is the sealing ring (480) that seals with described outer tube body (250).

12. suction tube according to claim 9 is characterized in that, the described member of rake that has is from the described member (470) that covers.

13. dust catcher (1), it has main body (2), electric fan and device for separation of waste are contained in the inside of described main body (2), described main body (2) is by aspiration (20,22,40) be connected with suction joint (24), described aspiration (20,22,40) comprise at least one rigid pipe (20), described suction joint (24) is arranged in the end of described rigid pipe (20), it is characterized in that, the part of described rigid pipe (20) is the assembly of each described suction tube (250,260,460) in the claim 1 to 12.

14. dust catcher according to claim 13, it is characterized in that, described rigid pipe (20) has articulated elements (26) at half length place of this rigid pipe (20) substantially, thereby allow tube portion (200) to rotate about 180 ° relative to another tube portion (300), described rotation is to carry out in the plane that is parallel to described body axis.

15. dust catcher according to claim 14 is characterized in that, described seal member (216) is arranged between described two tube portions (200,300); And described articulated elements (26) is associated to locking device, and described locking device is used for by described two tube portions are locked these two tube portions (200,300) to fetching.

16., it is characterized in that two tube portions of this of described pipe (20) (200,300) are the assemblies of each described suction tube in the claim 1 to 12 according to claim 13 or 14 described dust catchers (1).

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