JP3542273B2 - Suction port body and vacuum cleaner - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an air circulation type vacuum cleaner and a suction port provided in the vacuum cleaner.
[0002]
[Prior art]
The air-circulating vacuum cleaner draws air from the suction port of the suction opening body by operating an electric blower in the cleaner body, passes the sucked air through a filter to capture dust, and passes through the filter to move the electric blower. Is returned to the air inlet, and the returned air is collected and circulated for cleaning.
[0003]
The suction port provided in this type of vacuum cleaner is disclosed in Japanese Patent Publication No. 7-44911 andJP-A-7-136082As shown in the figure, the air discharged from the electric blower and returned to the intake port is blown from the circulation outlet provided in a predetermined direction to the blowout intake port and crossed with the surface to be cleaned. The dust on the surface to be cleaned, which is swept up by force, is sucked by the air sucked into the air inlet, thereby realizing a circulating cleaning.
[0004]
However, in such a configuration in which the air to be circulated is always blown toward the surface to be cleaned, when the suction port is brought close to the surface to be cleaned, or when the suction port is separated from the surface to be cleaned, There is a problem that light dust and the like on the surface to be cleaned are easily blown off by air blown out from the air inlet. Therefore, a technique capable of solving such a problem is known from Japanese Patent Application Laid-Open No. 9-23999 and Japanese Patent Publication No. 7-24643.
[0005]
FIGS. 3 and 4 of Japanese Patent Application Laid-Open No. 9-23999 show an on-off valve which is "open" when it is in close contact with the floor surface and "closed" when it is separated from the floor surface, that is, at both ends of the suction port of the suction device. A suction device for a vacuum cleaner that has a projection that penetrates through and that has an on-off valve that is always urged in the closing direction by a spring, and `` turns in '' when it comes into close contact with the floor and turns off when it comes off Thus, a suction device for a vacuum cleaner having a mechanism linked to a motor is described.
[0006]
In Japanese Patent Publication No. Hei 7-24643, an operation switch provided near a grip portion of a vacuum cleaner is operated to remotely open and close a reflux rate control valve. A technique is described which controls the control valve to lower the recirculation rate, opens a short circuit, or turns off a fan motor. Here, the dust collection port is the suction port of the suction port body, and the short-circuit path is a flow path provided between the suction flow path and the return path in the cleaner body. The valve is provided in the short-circuit path. By setting the recirculation rate close to 0% by this valve, air is not sucked in (dust absorption) from the outside. It is made to be performed.
[0007]
[Problems to be solved by the invention]
However, in any of Japanese Patent Application Laid-Open No. 9-23999 and Japanese Patent Publication No. 7-24643, the motor is turned off when the suction opening is separated from the floor (cleaning surface). Even if the rotor is turned off, the rotor continues to rotate due to inertia, so that the circulating air cannot be stopped instantaneously. For this reason, immediately after the suction port body is separated from the surface to be cleaned, air is still blown out through the air inlet, so that light dust on the surface to be cleaned is easily blown away by the air, and the effectiveness is not so large. Absent.
[0008]
Further, Japanese Patent Application Laid-Open No. 9-23999 and Japanese Patent Publication No. Hei 9-23999 disclose that air that is recirculated by opening and closing a valve provided on a suction opening body or a cleaner body is blown out from the suction opening of the suction opening body, or the blowing is stopped. In the technique described in Japanese Patent No. -24643, since the valve is located in the circulating air path, there is a problem that air circulation is easily hindered, and accordingly, the dust absorption performance is poor.
[0009]
The motor is operated to clean a soft sheet-like material, for example, a hanging curtain, with the suction opening described in Japanese Patent Application Laid-Open No. 9-23999 or the reflux-type vacuum cleaner described in Japanese Patent Publication No. Hei 7-24643. Then, the air blown out from the suction opening pushes the curtain, so that cleaning cannot be performed. Similarly, in the valve that opens and closes, the valve cannot be opened and closed particularly when a freely deformable curtain is detected as represented in Japanese Patent Application Laid-Open No. 9-23999, so that the valve remains closed. Even if the valve could be opened and the air could be recirculated, air could be blown out from the suction port of the suction port body and the curtain would be pushed in, so clean it. Can not.
[0010]
Further, in Japanese Patent Publication No. Hei 7-24643, the intensity of the air flow exerted on the surface to be cleaned can be changed according to the object to be cleaned by the opening of the recirculation rate control valve. Has the problems described above.
[0011]
Therefore, a first problem to be solved by the present invention is to suppress blowing off dust on the surface to be cleaned when approaching or separating from the surface to be cleaned without motor control or opening and closing of the air circulation path.Also suitable for cleaning soft sheet-like surfaces to be cleaned such as curtainsThe purpose is to obtain a suction port body.
[0013]
The present invention seeks to solveSecond taskIn order to solve the first problem, it is an object of the present invention to provide a suction opening body that can change the intensity of an air flow exerted on a surface to be cleaned in accordance with an object to be cleaned.
[0014]
The present invention seeks to solveThird issueIs to solve the first problem.Around, during cleaningAn object of the present invention is to provide a suction port body that does not damage a surface to be cleaned or the like.
[0015]
Also, the present invention seeks to solveFourth taskAre the first toThird issueIt is an object of the present invention to provide an air circulation type vacuum cleaner which can solve at least one of the problems.
[0016]
[Means for Solving the Problems]
Claims 1-7According to the invention, the air sucked by the operation of the electric blower in the cleaner body is passed through a filter to capture dust, and the air discharged from the electric blower passing through the filter is collected and circulated for cleaning. It is assumed that the vacuum cleaner has a suction port body having a connection portion that communicates with the main body of the cleaner and a suction port that is disposed close to the surface to be cleaned and that sucks air.
[0017]
In order to solve the first problem, the invention according to claim 1 has a suction port body main portion having an opposing outer surface facing the surface to be cleaned, the outer surface being provided with the intake port, A recirculation outlet located at one side of the intake port and provided at the main body of the intake port and for circulating air to the side of the intake port; a first control position and a second control at the main part of the intake port body; And the air blown out from the return outlet when moved to the first control position is directed toward the surface to be cleaned, and is moved to the second control position. At this time, the air blown out from the return outlet is directed in a direction other than the surface to be cleaned.Flow in a direction substantially parallel to the surface to be cleaned or away from the surface to be cleanedWind direction changing means.
[0018]
According to the first aspect of the present invention, despite the fact that the direction of the recirculation outlet for allowing air to recirculate and allow dust to be collected at the intake port is constant, the operation of the wind direction changing means causes the recirculation outlet to operate from the recirculation outlet. Change the direction of the blown air. That is, the wind direction changing means is blown out when the wind direction changing means is located at the first control position.Direct the air toward the surface to be cleaned,Blown when placed in the second control positionThe air is directed in a direction other than the surface to be cleaned, and flows in a direction substantially parallel to the surface to be cleaned or away from the surface to be cleaned.The switching of the wind direction changing means to the two positions may be manually performed during a cleaning operation or the like, or may be automatically performed in accordance with contact with or separation from the surface to be cleaned.
[0019]
Therefore, by arranging the wind direction changing means at the second control position and bringing the main portion of the suction port into and out of contact with the surface to be cleaned, the air blown out from the recirculation outlet can be prevented from passing through the air inlet. In directions other thanFlows in a direction approximately parallel to the surface to be cleaned or away from the surface to be cleanedThus, it is possible not to blow out in the direction of the surface to be cleaned. Since such a wind direction changing operation can be performed even during cleaning, it is not necessary to turn off the electric blower of the vacuum cleaner body in order to prevent air from being blown out from the air inlet, and also to return by changing the wind direction as described above. It is not necessary to provide a valve in the air circulation path to open and close the air circulation path in order to prevent such air from being blown out.
Further, in the invention of claim 1, the air blown out from the recirculation outlet is directed to a direction other than the surface to be cleaned while flowing in a direction substantially parallel to or away from the surface to be cleaned. The air that is blown off the soft sheet-like surface to be cleaned, such as curtains, is extremely small, and the suction action generated by the air blown out from the return outlet, that is, the outside air is sucked into the inlet Since the action to be performed is not so large, the sheet-like surface to be cleaned is not sucked. Therefore, according to the first aspect of the present invention, it is possible to remove the light dust on the surface of the sheet-like surface to be cleaned and to clean the surface by sucking the airflow.
[0020]
Further, when cleaning is performed with the wind direction changing means disposed at the first control position, the air to be recirculated can be passed through the air inlet and blown to the surface to be cleaned, whereby the surface to be cleaned can be cleaned. While dusting up, it can be cleaned by sucking it in with the air sucked into the air inlet. In the case where cleaning is performed with the wind direction changing means disposed at the second control position, the cleaning is not expected because the wind-up is not expected. Therefore, using the suction port body according to the present invention,By arranging the wind direction changing means at the first control position, not only can the light dust on the surface to be cleaned be prevented from being blown off, but also by arranging the wind direction changing means at the second control position, the wind direction changing means can be arranged at the first control position. Also cleaning abilityToCan be lowered and cleaned.
[0023]
SaidClaim 1In practicing the present invention, when the wind direction changing means is disposed at the second control position, it is more likely that a part of the air blown out from the recirculation outlet and flowing is blown out to the outside through the air inlet. To reduceClaim 2As in the present invention, the reflux outlet may be provided obliquely so as to blow air toward the connection portion.
[0024]
SaidSecondTo solve the problem,Claim 1 or 2Subordinate to inventionClaim 3The invention is characterized in that the movement of the wind direction changing means to the first control position narrows the first airflow path formed immediately after the return air outlet and allows air to flow toward the surface to be cleaned, and the second control position. The second blow air passage formed immediately after the return air outlet and passing air in a direction other than the surface to be cleaned is wider than the first blow air passage by moving the wind direction changing means toward the air outlet. It is.
[0025]
thisClaim 3In the invention,Claim 1 or 2In addition to the effects of the invention, there are the following effects. In other words, when cleaning is performed with the wind direction changing means disposed at the first control position, the air blown from the return air outlet passes through the narrow first blow air passage, so that the wind speed is increased, and the high-speed air is blown. Can be blown onto the surface to be cleaned through the air inlet, so that even heavy dust can be easily lifted off from the surface to be cleaned and sucked in to clean. Further, when cleaning is performed with the wind direction changing means disposed at the second control position, the air blown from the return air outlet passes through the wide second blow air path, whereby the wind speed is reduced, and this slow air is reduced. It can be caused to flow in a direction other than the surface to be cleaned, thereby making it possible to suck and clean light dust on the surface to be cleaned with low noise.
[0026]
SaidClaims 1-3Subordinate to one of these inventions in implementing any of the inventionsClaim 4As in the present invention, the wind direction changing unit includes a cleaning surface detection unit that protrudes from the opposite outer surface and is pressed against the cleaning surface, and the first direction is associated with the contact of the detection unit with the cleaning surface. A wind direction changing body moved over the control position and the second control position, and an urging body for urging the change body to be held at the second control position,The wind direction changing body may be provided with a guide surface for directing the air blown from the return air outlet obliquely to the surface to be cleaned when the wind direction changing means is at the first control position.
[0027]
thisClaim 4In carrying out the invention, it depends on this inventionAs in the invention of claim 5, the wind direction changing means isThe inclination angle of the guide surface when in the first control position may be 45 ° or more and less than 90 ° with respect to the surface to be cleaned. In the embodiment having such a guide surface, the air blown from the return outlet is blown obliquely to the surface to be cleaned, so that the dust on the surface to be cleaned is hardly pressed, and the dust can be easily removed. It can be cleaned by picking it up from the surface to be cleaned.
[0028]
SaidThirdTo solve the problem,Claim 4 or Claim 5Subordinate to inventionClaim 6The invention is characterized in that, when the wind direction changing body is at the first control position, a front end portion of the wind direction changing body facing the recirculation outlet is configured to form an external suction air path with the surface to be cleaned. Characterized in that it is held at a height that does not protrude therefrom. And thisClaim 6In practicing the invention,Claim 6Subordinate to inventionClaim 7As in the present invention, it is preferable to provide a spacer means for setting the size of the gap forming the external suction air passage to (0.5 to 1.5) mm.
[0029]
theseClaims 6 and 7In the present invention, the distal end of the airflow path changing body may protrude toward the surface to be cleaned from the opposed outer surface of the main body of the suction opening body which is close to and opposed to the surface to be cleaned, and may rub the surface against the surface to be cleaned. In addition, it is possible to prevent sand particles or the like from being caught between the surface to be cleaned and the outer surface facing the suction opening body. In particular, the external suction air passage secured by the spacer means makes it possible to increase the flow velocity of the air sucked into the intake port, thereby improving the dust suction performance.
[0030]
or,Claim 8According to the invention, the operation of the electric blower in the cleaner body sucks air from the suction port of the suction port body which is disposed in close proximity to the surface to be cleaned in a non-contact state, and passes the sucked air through a filter to generate dust. It is premised on a vacuum cleaner that captures air, returns the air discharged from the electric blower through the filter to the air inlet, and collects and returns the returned air to perform cleaning while circulating.
[0031]
And thisClaim 8The invention is as described above.FourthIn order to solve the problem, the suction port body isClaims 1 to 7The suction port body according to any one of the above items.
[0032]
Therefore, in this air circulation type vacuum cleaner,Claims 1 to 7By providing the suction port body according to any of the inventions,Claims 1 to 7The effects of any of the inventions can be obtained as described above,ThirdAn air-circulating vacuum cleaner that can solve at least one of the problems can be provided.
[0033]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 1 and 2, a hand-held air circulation type vacuum cleaner 11 according to the first embodiment includes a cleaner main body 12 and a suction opening 13 according to the first embodiment. ing.
[0034]
As shown in FIGS. 2 to 4, the cleaner main body 12 has a main body case 21 formed by connecting a pair of left and right synthetic resin case members by screwing or the like. A cylindrical connection port 22 whose one end is exposed is attached to the front end face inclined forward. The suction port body 13 is detachably inserted and attached to the connection port 22, for example. The connection port 22 has a plurality of ventilation ports 22a provided at intervals in the circumferential direction. A handle 23 is integrally formed on the rear upper side of the main body case 21. By gripping the handle 23, the entire vacuum cleaner 11 can be moved with one hand.
[0035]
On the inner surfaces of the two case members, required partitioning ribs whose tips are brought into contact with each other in accordance with the connection of these members are integrally provided. 24, a rear exhaust chamber 25, and a recirculation chamber 26 provided below the dust collecting chamber 24 and the exhaust chamber 25.
[0036]
The upper surface of the dust collection chamber 24 located on the front side of the exhaust chamber 25 is opened, and this opening is hermetically closed by a case lid 27 detachably attached to the upper front part of the main body case 21. The case lid 27 is rotated downward with the claw receiving hole 28 as a fulcrum in a state where the claw 27a at the front end thereof is inserted into the claw receiving hole 28 provided in the main body case 21, and the engagement provided at the rear end portion is formed. The projection 27b is provided below the hemispherical engagement projection receiver 29 provided on the main body case 21.received29 is pulled over from above and hooked, whereby it is attached and held in a closed state. The case lid 27 has an annular seal 30 for hermetic sealing, and has a handle hole 31 into which a plurality of fingers can be inserted. By pulling up the case cover 27 together with the finger inserted into the handle hole 31, the cover 27 can be pulled upward.
[0037]
The front wall of the dust collecting chamber 24 is formed as a filter mounting portion 32, and a filter holder 33 which is manually turned around the upper end of the filter mounting portion 32 in a direction indicated by an arrow in FIG. Is installed. A dust bag made of a paper pack as a filter which is housed in the dust collecting chamber 24 so as to be able to be taken in and out is housed in the dust collecting chamber 24 by attaching its mouth frame a to the filter attaching part 32 by a filter holder 33. . A filter support 35 having a large number of elongated ventilation holes is accommodated in the rear portion of the dust collecting chamber 24, and the filter support 35 supports the rear surface of the dust collecting bag 34 expanded with the cleaning operation.
[0038]
An electric blower 41 is installed in the exhaust chamber 25 with its suction port facing the dust collection chamber 24 side. Reference numerals 42 and 43 denote vibration-proof packings fitted around the electric blower 41. The rib located at the boundary between the exhaust chamber 25 and the dust collecting chamber 24 is provided with an opening 44 facing the suction port, whereby air passing through the dust collecting bag 34 in the dust collecting chamber 24 is removed. It is sucked into the electric blower 41. Furthermore, a unitized code reel device 45 located behind the electric blower 41 is accommodated in the exhaust chamber 25. Power is supplied to the electric blower 41 and the like via a power cord drawn out of the cord reel device 45 to the outside of the main body case 21.
[0039]
As partially shown in FIGS. 2 and 4 and the like, the electric blower 41 includes a stator, a diffuser screwed to one end surface of an iron core of the stator, and a fitting fitted around a periphery of the diffuser. A fan cover 50 having the suction port, a bearing bracket 51 screwed to the other end surface of the stator core, and rotatably supported over bearings (not shown) attached to the bearing bracket 51 and the diffuser, respectively. Rotor, a centrifugal fan connected to one end of a rotor shaft 52 of the rotor and covered with the fan cover 50, and a carbon brush elastically pressed against a commutator (not shown) of the rotor 52. And a pair of brush devices having the following. The anti-vibration packing 42 is fitted on the outer peripheral surface of the fan cover 50. As shown in FIG. 4, the bearing bracket 51 includes, for example, four pillars 51a, a bearing support part 51c provided integrally therewith to support the bearing 51b, and a stator provided at the other end of the pillar 51a. The brush device is attached to two pillars 51a of which are attached to an iron core.
[0040]
During the operation of the electric blower 41, the air sucked into the centrifugal fan from the suction port is discharged from around the fan, and then flows into the diffuser from the inlet at the outer periphery thereof while being guided by the inner surface of the fan cover 50. Then, the gas flows out toward the periphery of the stator while being made static by the diffuser.
[0041]
As shown in FIGS. 2 to 4, a cylindrical motor cover 53 made of synthetic resin or the like is fitted to and attached to the electric blower 41 so as to cover the stator and the bearing bracket, and is fitted to the outer peripheral portion of the diffuser. ing. The bearing support portion 51c of the bracket 51 penetrates through the bottom wall of the motor cover 53, and the vibration-proof packing 43 is fitted on the outer surface of the support portion 51c. A short cylindrical return port 54 is integrally formed on the outer periphery of the motor cover 53 so as to protrude outward. The return port 54 is a partition rib that forms a boundary between the two chambers 24 and 25 and the return chamber 26. It is inserted through a hole 56 provided in 55. Therefore, the inside of the motor cover 53 and the reflux chamber 26 are communicated via the reflux port 54.
[0042]
As shown in FIG. 2, a noise reduction member 61 is wound around an outer peripheral surface of the motor cover 53, and one or more of the motor cover 53 and the noise reduction member 61 communicate with each other. Exhaust holes 53a and 61a are opened. The inside of the motor cover 53 and the exhaust chamber 25 are communicated through the through holes 53a and 61a. An exhaust port 62 is opened in a rear side wall of the main body case 21 facing the exhaust chamber 25. With this structure, a part of the air discharged from the electric blower 41 is discharged to the outside of the main body case 21. Although this exhaust structure may be omitted, the balance between the blowing capacity of the electric blower 41 and the circulating air flow rate is adjusted so that when the air recirculated in the suction opening 13 is collected, the intake air described later is used. It is excellent in that even if the wind blows out from the mouth 92, it can be optimized so as not to be too strong.
[0043]
2 and 3, reference numeral 65 denotes a switch for turning on / off the power supply to the electric blower 41, and reference numeral 66 denotes a leak valve provided in an air passage communicating the dust collection chamber 24 with the outside of the main body case 21. The valve 66 has a predetermined vacuum pressure in the dust collection chamber 24.Than valueIt is used to open and introduce the outside air into the dust collection chamber 24 when it is lowered. In FIG. 2, reference numeral 68 denotes an outside air intake which forms a part of the ventilation path on the upstream side of the leak valve 66, and communicates with the outside of the main body case 21 through the handle hole 31.
[0044]
Next, the suction port 13 will be described with reference to FIGS. The suction port body 13 includes a connection pipe 71 as a connection portion, a suction port body main portion 72, a reflux outlet 73, and a wind direction changing mechanism 74.
[0045]
For example, the connection pipe 71 detachably inserted into the connection port 22 and communicated with the cleaner body 12 side includes an inner connection pipe 75 having both ends opened as shown in FIGS. And an outer connection pipe 76 provided integrally and coaxially on the side of the section.
[0046]
A cylindrical inner connection pipe 75 longer than the outer connection pipe 76 is inserted into the connection port 22 and abuts against a seal valve (not shown) of the port frame 34a to remove the dust-containing air. It is designed to be guided into the bag 34. A pair of upper and lower stopper protruding edges 77 and 78 protrude outward from an opening edge of a distal end portion of the inner connecting pipe 75 protruding outside the main body case 21.
[0047]
The outer connection pipe 76 having a short cylindrical shape and having a tapered portion whose diameter becomes gradually smaller toward the opening edge side of the distal end portion, has a return air introduction port 76a between itself and the inner connection pipe 75 at one axial end. Has formed. A pair of left and right return air outlets 76b are formed at the other end in the axial direction of the outer connection pipe 76 and open at right angles to the axial direction and toward each other in the outward direction. The peripheral wall of the return air outlet 76b forms an annular pivot tube portion 79. A hermetic sealing material 80 such as a synthetic rubber O-ring is attached to the outer peripheral surface of the outer connection pipe 76 on the side of the return air inlet 76a.
[0048]
When the connection pipe 71 is inserted into the connection port 22, as shown in FIG. 2, the outer connection pipe 76 is inserted until it hits the wall surface of the connection port 22 where the vent 22a is opened. The connection pipe 76 is fitted to the inner peripheral surface of the connection port 22, and airtightness between the connection pipe 76 and the inner peripheral surface is secured by the airtight seal material 80, and the connection pipe 76 is attached to the main body case 21. The detachment in this mounted state is performed by the frictional force of the rubber hermetic seal member 80. The reflux chamber 26 and the inside of the outer connection pipe 75 are communicated with each other via a return air introduction port 76a of the connection pipe 71 attached to the connection port 22 and a ventilation port 22a which is close to and opposed to the return air introduction port 76a.
[0049]
The suction port main part 72 is formed by connecting the main part upper case 81 and the main part lower case 82 by screwing. As shown in FIGS. 6 and 9, a pair of rib-shaped bearing plates 83 are protruded from the inner surfaces of the upper and lower cases 81 and 82 of the main part, and the pivot shaft part 79 is sandwiched from above and below by these. It is rotatably penetrated and supported. With this supporting structure, the suction port body main portion 72 is pivotally attached to the connection pipe 71 so as to be rotatable in the vertical direction, and the rotation causes the suction port body main portion 72 to take an appropriate posture with respect to the surface A to be cleaned. You can get it. In FIG. 5, reference numeral 85 denotes an upper stopper which comes into contact with / separates from the stopper protrusion 77, and reference numeral 86 denotes a lower stopper which comes into contact with / separates from the stopper protrusion 78. The movement angle is regulated.
[0050]
As shown in FIG. 5 and the like, the main part upper case 81 and the main part lower case 82 are provided with partitions 87 and 88 which continuously cover each other to cover the distal end opening of the inner connection pipe 75, and the lower partition 88 Is open at the bottom. A collection chamber 89 communicating with the inner connection pipe 75 is partitioned by partitions 87, 88 and the like inside the suction port main body 72, and a blowing chamber 90 surrounding the collection chamber 89 except for an opening on the lower surface thereof is defined. Have been. The recovery chamber 89 communicates with an inlet 92 described below, and the outlet chamber 90 communicates with the return air outlet 76b.
[0051]
As shown in FIG. 9 and the like, the bottom wall 91 of the main lower case 82 has an opposing outer surface 91 a which is disposed in close proximity to the surface to be cleaned A in a state of contact with the surface to be cleaned A. A U-shaped intake port 92 is formed in the main lower case 82 and opens at the outer surface 91 a, and the central portion of the intake port 92 faces the lower surface opening of the partition wall 88. The lower end of the partition wall 88 is thicker than the other portions. Between the lower surface of the thick end and the inner surface of the bottom wall 91, one side of the collection chamber 89 (the front side in the present embodiment). Is formed. The air returned into the blowing chamber 90 is blown out from the recirculation blowing port 73 toward the collection chamber 89. Providing the thick end is excellent in that the length of the recirculation outlet 73 in the blowing direction can be increased to give directionality to the air to be blown out.
[0052]
A pair of guide walls 94 for guiding the air sucked into the collection chamber 89 toward the collection chamber 89 are provided in the main lower case 82 at a slant in opposite directions to each other. A projecting wall 95 extending at a right angle over the space is provided. The protruding wall 95 is formed by a part of the bottom wall 91. Providing the protruding wall 95 is excellent in that the degree of vacuum can be increased and dust can be more reliably prevented from being blown out by blowing air from the air inlet 92 when the air inlet 13 is separated from the surface A to be cleaned. I have.
[0053]
The wind direction changing mechanism 74 includes a wind direction changing body 100 and a coil spring 112 described later. As shown in FIGS. 8 and 9, the wind direction changing body 100 includes a pair of left and right swing arms 101, a wind direction control unit 102 provided by integrally connecting one ends of the swing arms 101, It has a slanted air guide plate 103 that is integrally protruded from the lower end of the control unit 102 toward the connection pipe 71. A pivot 104 projects from an intermediate portion between the two swing arms 101.
[0054]
By individually fitting these pivots 104 into bearing holes 96 provided corresponding to the side surfaces of the intake port 92, the wind direction changing body 100 is housed in the intake port 92 as shown in FIG. 82 is attached to the lower surface so as to be rotatable about a pivot 104 as a fulcrum. During this rotation, the wind direction control unit 102 slides along the inner surface of the arc-shaped wall of the partition wall 88. By this rotation, the wind direction changing body 100 is moved between the first control position shown in FIG. 5A and the second control position shown in FIG. 5B.
[0055]
When the wind direction changing body 100 is disposed at the first control position, the lower end portion (tip portion) of the wind direction control unit 102, that is, the wind direction switching end portion 105 is opposed to the upper part of the return outlet 73 from the collection chamber 89 side. At the same time, the first outlet air passage 106 which is narrower than this is formed immediately after the return outlet 73. As a result, the air blown out from the recirculation outlet 73 toward the collection chamber 89 hits the wind direction switching end 105 and is passed through the first blow air passage 106 using this as a guide. As shown in FIG. 7, the air is blown through the air inlet 92 toward the surface A to be cleaned. Further, when the wind direction changing body 100 is disposed at the second control position, the wind direction switching end portion 105 is moved to the same level or higher than the upper end of the recirculation outlet 73, and the air flow direction is changed from the first airflow path 106. The second outlet air passage 107 is also formed and arranged immediately after the recirculation outlet 73. That is, due to the formation of the second blowing air path 107, the recirculation blowing port 73 is fully opened. Thereby, the air blown out from the recirculation outlet 73 to the collection chamber 89 side passes through the second blow-out air passage 107 without being disturbed by the wind direction switching end 105, for example, in a direction other than the surface to be cleaned, for example, substantially horizontal, In other words, the air is blown substantially parallel to the surface A to be cleaned.
[0056]
Although the air guide plate 103 may be omitted, it is necessary to provide the air guide plate 103 because the air vortex generated by wrapping around from the wind direction switching end 105 to the back side of the wind direction control unit 102 (when the vortex is generated, the air drawing action) Is generated, and the amount of air flowing toward the surface to be cleaned is reduced.).
[0057]
At the other end of the swing arm 101, a surface-to-be-cleaned detector 108 is attached. In the present embodiment, the cleaning surface detection unit 108 is formed by a pair of rollers 97 rotatably attached to the front of the suction port main body 72 and rotatable rollers forming spacer means. The lower portions of the cleaning surface detection unit 108 and the roller 97 project downward from the outer surface of the bottom wall 91, and when they are in contact with the cleaning surface A, an outer space between the cleaning surface A and the facing outer surface 91a is formed. A suction air passage 109 is formed. The size of the gap forming the external suction air passage 109 is set to (0.5 to 1.5) mm. Forming the spacer means with the rollers as described above is excellent in that it can be easily operated with less resistance and catch when the suction opening 13 is moved along the surface A to be cleaned.
[0058]
As shown in FIGS. 4 and 6, the main lower case 82 is provided with spring receiving portions 111 located on the left and right sides of the partition wall 88 and opened to the lower surface of the bottom wall 91, and these spring receiving portions 111 are respectively provided. A coil spring 112 as an urging member is housed. The lower ends of the coil springs 112 are applied to the swing arm 101 to urge the wind direction control unit 102 to hold the wind direction control unit 102 at the second control position. Further, in order to position the wind direction control unit 102 at the first control position against the urging force of the coil spring 112 when the suction opening 13 is pressed against the surface A to be cleaned, as shown in FIG. Stopper protrusions 113 and 114 are provided so as to face each other on the inner surface of the ceiling wall of the spring receiving portion 111 and the swing arm 101. Therefore, the positioning can be performed by bringing the stopper convex portions 113 and 114 into contact with each other.
[0059]
Next, the operation of the suction port body 13 having the above-described configuration and the operation of the vacuum cleaner 11 including the same will be described. The electric vacuum cleaner 11 is used by operating the electric blower 41 in a state where the connection pipe 71 of the suction port body 13 is inserted and connected to the connection port 22 of the cleaner body 12 as shown in FIG.
[0060]
In this use, the dust contained in the intake air (indicated by the dotted arrow in FIGS. 2 and 5) flowing into the dust collecting bag 34 through the inner connection pipe 75 of the suction opening 13 is transferred to the dust collecting bag 34. The air that has been captured and has passed through the dust bag 34 passes through the filter support 35 and is sucked into the electric blower 41, and then is discharged into the reflux chamber 26 through the reflux port 54 of the motor cover 53. A part thereof is discharged to the exhaust chamber 25 through the exhaust holes 61 and the holes 53a. Excess air discharged into the exhaust chamber 25 is discharged to the outside of the cleaner body 12 through the exhaust port 62.
[0061]
On the other hand, the exhaust gas that has flowed into the recirculation chamber 26 is introduced into the outer connection pipe 76 of the connection pipe 71 from the ventilation port 22 a of the connection port 22, and from the recirculation air outlet port 76 b of the outer connection pipe 76 to the suction port body main part. After being drawn out to the outlet chamber 90 of 72, the air is blown out from the reflux outlet 73 to the recovery chamber 89 side, and is sucked into the recovery chamber 89. The flow of the circulating wind is indicated by solid arrows in FIGS. Then, the circulating air is sucked into the cleaner body 12 again through the inner connection pipe 75. As the air discharged from the electric blower 41 is collected and circulated by the suction opening 13 in this manner, the external air is sucked together with the dust through the external suction air passage 109 into the suction opening 92 of the suction opening 13. Can be cleaned.
[0062]
The state in which the suction opening 13 is moved along the surface A to be cleaned in such cleaning is shown in FIG. In this case, as the surface-to-be-cleaned detector 108 of the wind direction changing mechanism 74 is pushed up against the surface A to be cleaned by the weight of the suction opening body 13 or the pressing force against the surface A to be cleaned, the wind direction changing member 100 Is rotated clockwise in FIG. 5 around the pivot 104 as a fulcrum against the urging force of the coil spring 112, and is disposed at the first control position shown in FIG. 5A. Then, the wind direction switching end 105 of the wind direction control unit 102 is lowered to a position facing the upper portion of the return outlet 73, and a narrow first outlet air path is provided between the wind direction switch end 105 and the front edge of the return outlet 73. 106 is formed.
[0063]
Therefore, as shown by the arrow of the return air flow in FIG. 5 (A), the air blown from the return air outlet 73 toward the rear recovery chamber 89 is directed toward the surface A to be cleaned by the wind direction switching end 105. The air can be guided and blown to the surface A to be cleaned through the first blowing air passage 106 and the air inlet 92.
[0064]
Therefore, the dust on the surface to be cleaned can be blown up by the blown air, and can be sucked and cleaned together with the outside air. Further, since the blowing of the return air to the surface to be cleaned is performed through the first blowing air passage 106 having a narrow flow path, it is necessary to increase the wind speed of the return air and blow the air to the surface to be cleaned through the air inlet 92. Accordingly, even heavy dust can be easily lifted up from the surface to be cleaned, sucked and cleaned.
[0065]
In this cleaning, the wind direction switching end 105 of the wind direction control unit 102 is held at a height position such that it does not protrude downward from the facing outer surface 91a of the bottom wall 91 as shown in FIG. It can be prevented that the switching end 105 rubs against the surface A to be cleaned and the surface A to be cleaned such as the wind direction switching end 105 itself and the flooring floor is damaged. In addition, the roller 97 and the surface to be cleaned are detected so that an external suction air passage 109 having a size of 0.5 mm to 1.5 mm is secured between the surface A to be cleaned and the opposed outer surface 91a having the intake port 92 opened. Since the portion 108 is provided, even if sand particles or the like are present on the surface A to be cleaned, they are prevented from being caught. Also in this respect, the surface to be cleaned A and the bottom wall 91 can be prevented from being damaged. In addition, since the roller 97 and the cleaning surface detection unit 108 are in rolling contact with the cleaning surface A, they rarely cause damage.
[0066]
In addition, by forming the external suction air passage 109 having the above-described size, the flow velocity of the air sucked into the air inlet 92 with the airflow blown out from the recirculation air outlet 73 and flowing is increased, and the surface to be cleaned is The performance of absorbing dust on A can be improved, and the cleaning performance can be improved.
[0067]
Then, at the same time when the suction opening 13 is separated from the surface to be cleaned during cleaning, the suction opening 13 is brought into a state shown in FIG. That is, when the cleaning surface detecting unit 108 does not detect the cleaning surface A (specifically, when the cleaning surface detecting unit 108 does not push up the cleaning surface A), the wind direction changing body 100 is rotated counterclockwise by the urging force of the coil spring 112. Since the wind direction controller 102 is rotated about the pivot 104 as a fulcrum, the wind direction control unit 102 rises, the wind direction switching end 105 is disposed above the return outlet 73, and the return outlet 73 is fully opened.
[0068]
Therefore, the air flow direction switching end 105 does not obstruct the flow of the return air from the return air outlet 73 toward the collection chamber 89 at the rear, and the return air is substantially parallel to the surface A to be cleaned, specifically, the opposite outer surface. The air is blown out so as to be substantially parallel to 91 a, and the air flows so as to cross the intake port 92 rearward, and is sucked into the connection pipe 71 through the collection chamber 89. In this case, since the wide second blowing air path 107 is formed between the wind direction switching end 105 and the front edge of the recirculation outlet 73, the flow velocity of the blown air is reduced, and the sound accompanying the blowing is reduced. it can.
[0069]
In this way, the return air blown out from the return outlet 73 is prevented from being blown toward the surface A to be cleaned through the inlet 92, and is recovered while flowing in a direction other than the surface A to be cleaned. And can be circulated through the previously described circulation path. In this case, the amount of air blown out from the return outlet 73 is extremely small, and the effect of sucking air into the inlet 92 with the air blown out from the return outlet 73 is not so large. Therefore, when the surface to be cleaned made of a soft sheet-like material such as a curtain is cleaned by the suction opening 13 in the state shown in FIG. 5B, the surface to be cleaned is not blown, and suction is performed. Instead, it is possible to suck the light dust on the surface of the sheet-like surface to be cleaned and blow the airflow to clean the surface.
[0070]
Also, as described above, when the suction port body 13 is separated from the surface to be cleaned A while the electric blower 41 is operating, the air blown out from the suction port 92 flows in a direction other than the surface to be cleaned A. When the suction port body 13 is brought close to the surface A to be cleaned and separated from the surface A to be cleaned, the air flowing out of the suction port 92 and the air blown out from the air inlet 92 can be extremely reduced to a practically negligible level. No air is blown in the direction. Therefore, it is possible to prevent light dust on the surface to be cleaned A from being blown off.
[0071]
Moreover, in the present embodiment, the wind direction changing body 100 is urged by the coil spring 112, so that the suction opening body 13 is automatically brought into contact with or separated from the surface A to be cleaned, and the wind direction changing body 100 is automatically moved as described above. 100 can be moved between the first control position and the second control position, so that the position of the wind direction changing body 100 can be selected without particularly requiring a manual operation for changing the wind direction, which is convenient for operation.
[0072]
As described above, the direction of the air can be changed in accordance with the contact and separation of the suction port body 13 with the surface A to be cleaned even during cleaning, so that the electric blower of the cleaner main body 12 is used to stop the blowing of air from the suction port 92. There is no need to turn 41 off. The change of the wind direction in the cleaner body 12 prevents the air to be recirculated from being blown out to the outside through the air inlet 92. There is no need to provide and open and close it. Therefore, the circulation of air in the circulating air path is hardly hindered, and accordingly, the dust absorbing performance can be improved.
[0073]
FIG. 11 shows a second embodiment of the present invention. This embodiment has basically the same configuration as that of the first embodiment. Therefore, the same components are denoted by the same reference numerals as those of the first embodiment, and the configuration and operation will be described. Are omitted, and different portions will be described below. The differences between the second embodiment and the first embodiment are the structures of the recirculation outlet 73 and the wind direction changer 100 and their interrelationships.
[0074]
That is, in the second embodiment, the reflux outlet 73 is formed to be inclined obliquely upward toward the connection pipe 71. The wind guide plate 103 of the wind direction changing body 100 is also provided to project obliquely upward toward the connection pipe 71. When the wind guide plate 103 is omitted, the end face of the wind direction switching end 105 may be inclined obliquely upward toward the connection pipe 71. When the wind direction changing body 100 is located at the second control position, the wind guide plate 103 (or the inclined front end surface of the wind direction switching end portion 105) is located above the upper inclined inner surface 73a of the recirculation outlet 73, preferably FIG. As shown in (B), it is arranged to be flush with the upper inclined inner surface 73a. The configuration other than the above is the same as the configuration of the suction port 13 and the vacuum cleaner 11 including the same, including the portions not shown, according to the first embodiment.
[0075]
Also in the configuration of the second embodiment, the same effects as those of the first embodiment can be obtained to solve the respective problems of the present invention. In addition, due to the configuration of the recirculation outlet 73 and the baffle plate 103 (or the inclined end surface of the wind direction switching end 105), the recirculation air blown from the recirculation outlet 73 flows so as to cross the intake port 92. At this time, since the air can be caused to flow in a direction away from the surface to be cleaned rather than being substantially parallel to the surface A to be cleaned, the air flowing through the air inlet 92 toward the connecting pipe 71 is restricted by the spread of the air. However, it is excellent in that it is possible to more reliably prevent a part thereof from leaking outside through the air inlet 92 and being sprayed on the surface to be cleaned.
[0076]
FIG. 12 shows a third embodiment of the present invention. This embodiment has basically the same configuration as that of the first embodiment. Therefore, the same components are denoted by the same reference numerals as those of the first embodiment, and the configuration and operation will be described. Are omitted, and different portions will be described below. The difference of the third embodiment from the first embodiment is the structure of the wind direction switching end 105 of the wind direction control unit 102.
[0077]
That is, in the third embodiment, the wind direction switching end portion 105 is blown out from the reflux outlet 73 when facing the outlet of the reflux outlet 73 when the wind direction changing body 100 is located at the first control position. And a guide surface 105a for directing the generated air obliquely to the surface A to be cleaned. The guide surface 105a is formed at an inclination angle θ of 45 ° or more and less than 90 ° with respect to the surface A to be cleaned. The configuration other than the above is the same as the configuration of the suction port 13 and the vacuum cleaner 11 including the same, including the portions not shown, according to the first embodiment.
[0078]
Also in the configuration of the third embodiment, the same effects as those of the first embodiment can be obtained, and the respective objects of the present invention can be solved. In addition, since the guide surface 105a is provided at the wind direction switching end 105, the air blown out from the return outlet 73 is blown obliquely to the surface A to be cleaned. It is unlikely that the dust will be pressed to hinder the suction. Therefore, it is excellent in that dust (dust) such as a relatively heavy coin-shaped object or a light and flat clip falling on the surface A to be cleaned can be easily lifted up and the suction can be cleaned.
[0079]
FIG. 13 shows a fourth embodiment of the present invention. This embodiment has basically the same configuration as that of the first embodiment. Therefore, the same components are denoted by the same reference numerals as those of the first embodiment, and the configuration and operation will be described. Are omitted, and different portions will be described below. The difference of the fourth embodiment from the first embodiment is the structure of the wind direction switching end 105 of the wind direction control unit 102.
[0080]
That is, in the fourth embodiment, the wind direction switching end 105And the air guide plate 103 is as shown in FIG.As shown, the wind direction changing body 100In the second control positionWhen placed, parallel to the opposing outer surface 91a and the surface A to be cleanedBecomesIn addition, it is formed so that it has an area larger than the thickness of the wind direction control unit 102 and is closely opposed to the surface A to be cleaned in a non-contact state. The configuration other than the above is the same as the configuration of the suction port 13 and the vacuum cleaner 11 including the same, including the portions not shown, according to the first embodiment.
[0081]
Also in the configuration of the fourth embodiment, the same effects as those of the first embodiment can be obtained to solve the respective problems of the present invention.
[0082]
The present invention is not limited to the above embodiments. For example, in order to arrange the wind direction changing body 100 at the first control position and the second control position, instead of abolishing the coil spring 112, an operation unit interlocking with the wind direction changing body 100 is provided, and this operation unit is manually operated. By doing so, the wind direction changing body 100 may be moved.
[0083]
In the present invention, as the spacer means provided on the suction opening 13, brush bristles protruding from the lower surface of the main part lower case 82, or a rotary cleaning body such as a rotary brush may be used, or the main part lower case 82 may be used. You may use the convex part protruded integrally.
[0084]
Further, the present invention is not limited to the handy type vacuum cleaner and the suction port body for each of the above embodiments, but may be applied to an upright type, a canister type, and other types of vacuum cleaners and a suction port body therefor. Applicable.
[0085]
In each of the above embodiments, the connection portion 71 of the suction port body 13 is communicated with the cleaner main body 12 by directly inserting the connection port 22 into the connection port 22. , The connecting portion 71 may be indirectly communicated with the cleaner body 12 via this member. In this case, the relay air passage member may have a structure in which the reflux passage and the recovery passage are coaxially arranged and arranged side by side.
[0086]
【The invention's effect】
The present invention is implemented in the form described above, and has the following effects.
[0087]
Claim 1 and its dependentsClaim 2According to the suction port body according to the described invention, when the main section comes into contact with or separates from the surface to be cleaned by the wind direction changing means provided on the main section of the suction port body, the air blows from the recirculation outlet toward the intake port side. The blown air is prevented from being blown out through the air inlet, so that the dust on the surface to be cleaned can be prevented from being blown off in accordance with the contact and separation, and in order to prevent such blowout, the cleaning device body is There is no need to provide a motor control for turning off the electric blower or provide a valve in the air circulation path to open and close it.
[0088]
Furthermore,The invention of claim 1And this inventionSubordinate toClaim 2Suction port body according to the inventionAccording to such as curtainsSince the soft sheet-shaped surface to be cleaned is not blown or sucked into the air inlet, the airflow can be sucked into the surface of the sheet-shaped surface to be cleaned, and the light dust on the surface can be absorbed. It is suitable for cleaning soft sheet-like surfaces to be cleaned such as curtains.
[0089]
Claim 1 or 2Subordinate to the inventionClaim 3According to the suction port body according to the invention,Claim 1 or 2In addition to the effects of the present invention, the air blown out from the recirculation outlet is blown onto the surface to be cleaned by increasing the wind speed through a narrow first blow-off air passage, or is passed through a wide second blow-out air passage. Can be selected to be slowed down and caused to flow in a direction other than the surface to be cleaned, so that the cleaning can be performed by adjusting the strength of the air flow exerted on the surface to be cleaned to the cleaning target.
[0090]
Claims 1-3Dependent on any of the inventionsClaim 4Suction body according to the invention,And this claim 4Subordinate to inventionClaim 5According to the inventionAccording to the suction bodyIn each case, the same effect as that of the first aspect can be obtained.
[0091]
Claim 4 or Claim 5Subordinate to the inventionClaim 6According to the inventionAccording to the suction bodyIn addition to the effects of the first aspect of the present invention, in addition to the above, the tip of the airflow path changing body hits the surface to be cleaned during cleaning and rubs this surface, or sand particles are formed between the surface to be cleaned and the opposing outer surface of the suction opening body. It is possible to prevent the surface to be cleaned or the like from being damaged by biting the surface.
[0092]
or,Claim 8According to the air circulation type vacuum cleaner according to the invention, the first to the first areThirdAn air-circulating vacuum cleaner that can solve at least one of the problems can be provided.
[Brief description of the drawings]
FIG. 1 is a perspective view showing the entire configuration of a vacuum cleaner according to a first embodiment of the present invention in a state where a cleaner body and a suction opening body are separated.
FIG. 2 is a vertical sectional side view showing the configuration of the entire vacuum cleaner shown in FIG.
FIG. 3 is a perspective view showing a configuration of the main body of the vacuum cleaner shown in FIG. 1 with a part thereof removed;
FIG. 4 is a sectional view taken along the line ZZ in FIG. 2;
FIG. 5A is a vertical sectional side view showing a configuration of a suction port body according to the first embodiment in a state where a wind direction changing body is arranged at a first control position.
(B) is a longitudinal sectional side view showing the configuration of the suction port body according to the first embodiment in a state where the wind direction changing body is arranged at a second control position.
FIG. 6 is a plan view showing a part of the configuration of the suction opening body shown in FIG. 5 in a state where a main part upper case is removed;
FIG. 7 is a rear view showing the configuration of the suction opening body shown in FIG. 5 in a slightly inclined state.
FIG. 8 is a bottom view of the suction port shown in FIG.
FIG. 9 is an exploded perspective view showing the configuration of the suction port shown in FIG. 5;
FIG. 10 is a sectional view taken along the line YY in FIG. 6;
FIG. 11A is a vertical sectional side view showing a configuration of a suction port body according to a second embodiment of the present invention in a state where a wind direction changing body is disposed at a first control position.
(B) is a longitudinal side view showing the configuration of the suction port body according to the second embodiment in a state where the wind direction changing body is arranged at a second control position.
FIG. 12A is a longitudinal sectional side view showing a configuration of a suction port body according to a third embodiment of the present invention in a state where a wind direction changing body is disposed at a first control position.
(B) is a longitudinal sectional side view showing a configuration of a suction port body according to a third embodiment in a state where a wind direction changing body is arranged at a second control position.
FIG. 13A is a longitudinal sectional side view showing a configuration of a suction port body according to a fourth embodiment of the present invention in a state where a wind direction changing body is arranged at a first control position.
(B) is a longitudinal sectional side view showing a configuration of a suction port body according to a fourth embodiment in a state where a wind direction changing body is arranged at a second control position.
[Explanation of symbols]
11 ... vacuum cleaner,
12 ... vacuum cleaner body,
13 ... suction body,
24 ... Dust collection room,
25 ... exhaust chamber,
26 ... reflux chamber,
34 ... Dust collection bag (filter),
41 ... electric blower,
53 ... motor cover,
54 ... reflux port,
71 ... connection part (connection pipe),
72 ... main part of the suction body
73… Reflux outlet,
74 ... wind direction changing mechanism (wind direction changing means)
75 ... inner connecting pipe,
76 ... outer connecting pipe,
91 ... bottom wall,
91a ... opposed outer surface,
92 ... inlet,
97 ... roller (spacer means),
102 ... wind direction control unit,
105: wind direction switching end,
105a: wind direction switching end guide surface
θ: The inclination angle of the guide surface at the end of the wind direction switching,
106: first blowing air path,
107: second blowing air path,
108: cleaning surface detection unit (spacer means)
109: external suction air passage,
112 ... Coil spring (biasing body).

Claims (8)

An electric vacuum cleaner that captures dust by passing air sucked by an operation of an electric blower in a cleaner body through a filter, collects air discharged from the electric blower through the filter, and performs cleaning while circulating. The suction port body having a suction port that is provided in the vicinity of the connection portion and the surface to be cleaned that is communicated with the cleaner body side and suctions air.
A suction port body main portion having an opposing outer surface facing the surface to be cleaned and having the air inlet opened on the outer surface;
A recirculation outlet that is located at one side of the intake port and that circulates air that is provided in the intake port body and that circulates toward the intake port side;
The suction port main body is provided so as to be movable between a first control position and a second control position, and when moved to the first control position, blows air blown out from the return outlet toward the surface to be cleaned. And the air blown from the return outlet when moved to the second control position is directed in a direction other than the surface to be cleaned, and is substantially parallel to the surface to be cleaned or the surface to be cleaned. Wind direction changing means for flowing in a direction away from the
Suction body. 2. The suction port body according to claim 1 , wherein the reflux outlet is provided obliquely so as to blow air toward the connection portion . 3. The movement of the wind direction changing means to the first control position narrows the first airflow path formed immediately after the return outlet and through which air flows in the direction of the surface to be cleaned, and the wind direction to the second control position. 2. The movement of the change means, wherein a second blow air passage formed immediately after the recirculation blow outlet and passing air in a direction other than the surface to be cleaned is wider than the first blow air passage. 3. 3. The inlet body according to 2. The wind direction changing means includes a surface-to-be-cleaned detector that protrudes from the opposite outer surface and is pressed against the surface to be cleaned. A wind direction changing body that is moved over the control position, and an urging body that urges the wind direction changing body to hold the changed body at the second control position. 4. A guide surface for directing air blown from the return outlet obliquely with respect to the surface to be cleaned when the device is at the first control position . Item 2. An inlet body according to item 1. The suction port according to claim 4, wherein an inclination angle of the guide surface when the wind direction changing unit is at the first control position is 45 ° or more and less than 90 ° with respect to the surface to be cleaned. body. When the wind direction change body is at the first control position, a tip end of the wind direction change body facing the recirculation outlet does not protrude from the facing outer surface forming an external suction air path between the wind direction change body and the surface to be cleaned. The suction opening according to claim 4, wherein the suction opening is held at a height position . The suction port body according to claim 6, further comprising a spacer means for setting a size of the gap forming the external suction air passage to (0.5 to 1.5) mm . By the operation of the electric blower in the cleaner body, air is sucked from the suction port of the suction port body arranged close to the surface to be cleaned, the sucked air is passed through a filter to capture dust, and passes through the filter. And returning the air discharged from the electric blower to the intake port, and collecting and returning the returned air to perform vacuum cleaning while circulating the air.
The suction port body is the suction port body according to any one of claims 1 to 7. And a vacuum cleaner.

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