JPH11346971A - Inlet port body and vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inlet port body capable of suppressing the blowing-out of dust on a surface to be cleaned without performing motor control or opening/ closing an air circulation route when it is brought into contact with/separated from the surface to be cleaned. SOLUTION: An inlet port body 13 provided in an air circulation type vacuum cleaner has an inlet port body main part 72, a circulation flow blowing-out port 73 and a wind direction changing mechanism 74. In an outer surface opposite to the part 72 disposed closely to a surface A to be cleaned, an intake port 92 is provided. The blowing-out port 73 is positioned in one side of the intake port 92, and exhaust air returned from a cleaner body side is blown out from the blowing-out port 73 to a recovery chamber 89 side. The wind direction changing mechanism 74 is provided to be movable to first and second control positions. This mechanism directs air blown out from the blowing-out port 73 toward the surface A to be cleaned when moved to the first control position, and directs air blown out from the blowing-out port 73 toward a direction other than the surface A to be cleaned when moved to the second control position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. 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]

2. Description of the Related Art An air-circulating vacuum cleaner draws air from a suction port of a suction port body by the operation of an electric blower in a cleaner body, passes the sucked air through a filter to capture dust, and removes the filter. The air that passes through and is discharged from the electric blower is returned to the intake port, and the returned air is collected and circulated for cleaning.

A suction port provided in this type of vacuum cleaner is disclosed in Japanese Patent Publication No. Hei 7-44911 and Japanese Patent Laid-Open No. Hei 7-136.
No. 028, etc., the air discharged from the electric blower and returned to the intake port is passed from the circulating outlet provided in a predetermined direction to the outlet, and is blown so as to cross the surface to be cleaned. In addition, dust on the surface to be cleaned, which is swept up by the momentum, is sucked by the air sucked into the air inlet, thereby realizing a circulation type cleaning.

However, in such a configuration in which the air to be circulated is always blown toward the surface to be cleaned, the suction opening is brought closer to the surface to be cleaned, and conversely, the suction opening is separated from the surface to be cleaned. In this case, there is a problem that light dust or the like on the surface to be cleaned is 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.

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 away from the floor, that is, suction tools are provided at both ends. A suction device for a vacuum cleaner having a projection that penetrates the intake port of the vacuum cleaner and having an on-off valve that is always urged in the closing direction by a spring. A suction device for a vacuum cleaner having a mechanism linked to a motor so as to be "cut" is described.

In Japanese Patent Publication No. Hei 7-24643, an operation switch provided near a grip portion of a vacuum cleaner is operated to remotely control opening and closing of a reflux rate control valve, and a dust collection port is separated from a surface to be cleaned. And a technique for automatically controlling the control valve to lower the recirculation rate, open a short circuit, or turn 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, external air is not sucked (dust absorption), and by setting the recirculation rate close to 100%, dust is absorbed. It is made to be performed.

[0007]

However, Japanese Patent Application Laid-Open No. 9-23999 and Japanese Patent Publication No. Hei 9-23999 are designed to turn off the motor when the suction opening is separated from the floor (surface to be cleaned).
In any of the techniques of -24643, even after the motor is turned off, its rotor continues to rotate due to inertia, so that the circulating air cannot be stopped instantaneously. Therefore, immediately after the suction opening body is separated from the surface to be cleaned, air is still blown out through the air intake port, 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.

Japanese Unexamined Patent Application Publication No. 9-23999 discloses that air that is recirculated by opening and closing a valve provided on a suction port body or a cleaner body is blown out from the suction port of the suction port body, or the blowing is stopped. In the technique described in Japanese Patent Publication No. Hei 7-24643, since the valve is located in the circulating air path, there is a problem that air circulation is easily hindered, and accordingly the dust absorbing performance is poor.

[0009] The motor is operated with a suction opening member described in Japanese Patent Application Laid-Open No. 9-23999 or a recirculation type vacuum cleaner described in Japanese Patent Publication No. Hei 7-24643 to produce a soft sheet-like material.
For example, if you try to clean a hanging curtain,
The air cannot be cleaned because the air blown out from the suction body pushes the curtain. Similarly, when the valve is opened and closed, the valve cannot be opened and closed particularly when a freely deformable curtain is detected as represented by 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 cleaning should be performed. Can not.

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. The use of the above has various problems as described above.

Accordingly, a first problem to be solved by the present invention is to blow off dust on the surface to be cleaned when coming into contact with or separating from the surface to be cleaned without controlling the motor or opening and closing the air circulation path. It is to obtain a suction port body that can be suppressed.

A second problem to be solved by the present invention is as follows.
In order to solve the first problem, it is an object of the present invention to provide a suction opening suitable for cleaning a soft sheet-like surface to be cleaned such as a curtain.

A third problem to be solved by the present invention is as follows.
In order to solve the first problem, an object of the present invention is to provide a suction port body that can change the intensity of an air flow exerted on a surface to be cleaned according to a cleaning target.

A fourth problem to be solved by the present invention is as follows.
In order to solve the first problem, it is an object of the present invention to provide a suction port that does not damage a surface to be cleaned during cleaning.

A fifth object of the present invention is to provide an air circulation type vacuum cleaner capable of solving at least one of the first to fourth problems.

[0016]

Means for Solving the Problems The inventions of claims 1 to 9 are:
Vacuum cleaner that cleans while sucking dust sucked by the operation of the electric blower in the cleaner body through a filter, collecting air discharged from the electric blower through the filter and circulating the air And a suction port body having a connection portion communicated with the cleaner body side and a suction port which is disposed close to the surface to be cleaned and suctions air.

In order to solve the first problem, the invention according to claim 1 has a main body of a suction port body having an outer surface facing the surface to be cleaned and having the intake port opened in the outer surface. A recirculation outlet that is located on one side of the intake port and is provided in the main body of the intake port and circulates air to the side of the intake port, and a first control position on the main part of the intake port. The first control position is provided so as to be movable with respect to the second control position.
While directing the air blown out from the return outlet when moved to the control position toward the surface to be cleaned, the air blown out from the return outlet when moved to the second control position is Wind direction changing means for directing the wind in a direction other than the surface to be cleaned.

According to the first aspect of the present invention, the air is returned by the operation of the wind direction changing means, despite the fact that the direction of the return air outlet for recirculating the air and allowing the dust to be sucked at the intake port is constant. Change the direction of the air blown out from the outlet. In other words, the wind direction changing means is the first
The direction of the air blown when placed at the control position is changed to be directed to the surface to be cleaned, and the direction of the air blown when placed at the second control position is directed to a direction other than the surface to be cleaned. change. 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 as the wind direction changing means approaches or separates from the surface to be cleaned.

Therefore, by arranging the wind direction changing means at the second control position and bringing the main body of the suction port into and out of contact with the surface to be cleaned, the air blown out from the return air outlet can be prevented from passing through the air suction port. It can be directed to a direction other than the surface to be cleaned so as not to blow out toward 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 blowing out from the intake port, 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, when cleaning is performed by arranging the wind direction changing means at the first control position, the air to be recirculated can be passed through the air inlet to be blown on the surface to be cleaned. While cleaning up the dust on the cleaning surface, it can be sucked and cleaned together 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, it is not possible to expect the wind-up, and thus the cleaning performance is low such that it becomes difficult to suck in light dust other than dust. Therefore, by arranging the wind direction changing means at the first control position using the suction port body according to the present invention, it is possible not only to prevent the light dust on the surface to be cleaned from being blown off, but also to arrange it at the second control position. Thus, cleaning can be performed with a reduced cleaning ability as compared with the case where the first control position is provided.

According to a second aspect of the present invention, in order to solve the second problem, when the wind direction changing means is at the second control position, the air is blown out from the return air outlet. Air flows substantially parallel to the surface to be cleaned or in a direction away from the surface to be cleaned.

According to the second aspect of the present invention, the air blown from the recirculation outlet is caused to flow in a direction substantially parallel to or away from the surface to be cleaned and is directed to a direction other than the surface to be cleaned. Since the amount of air blown to the outside is extremely small, a soft sheet-like surface to be cleaned such as a curtain is not blown, and the suction action generated by the air blown out from the recirculation outlet, that is, the air is discharged to the intake port. The effect of trying to suck in the air is not so large, so that the sheet-like surface to be cleaned is not sucked. Therefore, according to the second aspect of the present invention, the air can be sucked into the surface of the sheet-like surface to be cleaned, and the light dust on the surface can be sucked and cleaned.

In practicing the first or second aspect of the present invention, when the wind direction changing means is disposed at the second control position, a part of the air blows out of the recirculation outlet and spreads, thereby blocking the intake port. In order to reduce the possibility of being blown out to the outside, as in the invention of claim 3,
It is preferable that the reflux outlet is provided obliquely so as to blow air toward the connection portion.

In order to solve the third problem, the invention according to claim 4 which is dependent on any one of the inventions according to any one of claims 1 to 3, is characterized by moving the wind direction changing means to the first control position. Along with narrowing a first blow air passage formed immediately after the reflux blow outlet and allowing air to flow toward the surface to be cleaned,
By moving the wind direction changing means to the second control position,
A second outlet air passage formed immediately after the return outlet and passing air in a direction other than the surface to be cleaned is wider than the first outlet air passage.

In the invention of claim 4, claim 1
In addition to the effects of any one of the inventions of the above, the following effects are provided. 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 outlet air passage, so that the wind speed is increased, and this high-speed air Can be blown onto the surface to be cleaned through the air inlet, so that even heavy dust can be lifted up from the surface to be cleaned and easily sucked and cleaned.
Further, when cleaning is performed by arranging the wind direction changing means at the second control position, the air blown from the recirculation 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, and thus, it is possible to suck and clean light dust on the surface to be cleaned with low noise.

In practicing any one of the first to fourth inventions, as in the invention of the fifth invention subordinate to one of the inventions, the wind direction changing means is moved from the opposite outer surface to the outside. A wind direction change body that has a cleaning surface detection unit that protrudes and is pressed against the cleaning surface, and that is moved over the first control position and the second control position as the detection unit comes into contact with or separates from the cleaning surface; , This modified body is referred to as the second
And an urging member for urging the holding member to be held at the control position.

In carrying out the invention of claim 5,
According to a sixth aspect of the present invention, when the wind direction changing means is at the first control position, a guide for obliquely directing the air blown out from the return outlet with respect to the surface to be cleaned. Preferably, a surface is provided on the wind direction changing body,
Further, in this case, the inclination angle of the guide surface when the wind direction changing means is at the first control position is set to the cleaning surface as in the invention of claim 7 which is dependent on the invention of claim 6. On the other hand, the angle is preferably 45 ° or more and less than 90 °. 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.

In order to solve the fourth problem, the present invention is dependent on any one of claims 5 to 7.
When the wind direction changing body is at the first control position, the tip of the wind direction changing body facing the recirculation outlet is configured to form an external suction air path between the wind direction changing body and the surface to be cleaned. It is characterized by being held at a height position that does not protrude from the outer surface. In carrying out the invention of claim 8, as in the invention of claim 9 dependent on the invention of claim 8, the size of the gap forming the external suction air passage is set to (0.5 to 1.5). ) Mm.

According to the eighth and ninth aspects of the present invention, the tip of the airflow path changing body protrudes toward the surface to be cleaned from the opposing outer surface of the main portion of the suction port body which is close to and opposes the surface to be cleaned. It is possible to prevent the surface from being rubbed against the surface, and to prevent sand particles or the like from being caught between the surface to be cleaned and the opposite outer surface of the suction port 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 air inlet, thereby improving the dust suction performance.

According to a tenth aspect of the present invention, the operation of the electric blower in the cleaner main body sucks air from the suction port of the suction port body which is arranged in close proximity to the surface to be cleaned in a non-contact state. The suction air is passed through a filter to capture dust, the air passed through the filter and discharged from the electric blower is returned to the intake port, and the returned air is collected and circulated for cleaning. Assume a vacuum cleaner.

According to a tenth aspect of the present invention, in order to solve the fifth problem, the suction opening is the suction opening according to any one of the first to ninth aspects. Things.

Therefore, in this air circulation type vacuum cleaner, by providing the suction port according to any one of the first to ninth aspects of the invention, the operation of any one of the first to ninth aspects of the invention is already performed. As described above, it is possible to provide an air circulation type vacuum cleaner capable of solving at least one of the first to fourth problems.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 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 has a main body case 21 formed by connecting a pair of left and right synthetic resin case members with screws or the like.
A cylindrical connection port 22 whose one end is exposed at a front end surface inclined forward is attached to the front part of the first connection part 1. 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 upper rear portion of the main body case 21.
, The entire vacuum cleaner 11 can be held and moved with one hand.

On the inner surfaces of the two case members, required partitioning ribs whose tips are brought into contact with each other along with the connection of these members are integrally provided. Dust collection chamber 24 and rear exhaust chamber 25
And a recirculation chamber 26 provided below the dust collection chamber 24 and the exhaust chamber 25.

The dust collection chamber 24 located in front of the exhaust chamber 25
Is opened, and this opening is hermetically closed by a case lid 27 which is detachably attached to a front upper portion 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.
The engagement convex portion 27b provided at the rear end portion is hooked onto the lower side of the hemispherical engagement convex portion receiver 29 provided on the main body case 21 by climbing over the receiver 29 from above, thereby closing the lid. Mounted and held. The case lid 27 has an annular seal 30 for hermetic sealing, and has a handle hole 31 through which a plurality of fingers can be inserted. By pulling up the case lid 27 together with the finger inserted into the handle hole 31, the lid 27 can be pulled upward.

The front wall of the dust collecting chamber 24 has a filter mounting portion 32.
In the vicinity of the upper end of the filter mounting portion 32, a filter holder 33 that is manually turned against the force of the spring 33a and is rotated in the direction of the arrow in FIG. 2 is mounted. The paper bag-made dust collection bag 34 as a filter that is housed in the dust collection chamber 24 so as to be able to be taken in and out is housed in the dust collection chamber 24 by attaching the opening frame 34 a to the filter attachment part 32 by the filter holder 33. . Dust collection chamber 24
At the rear of the filter support 3 has a number of elongated vents
5, and the filter support 35 supports the rear surface of the dust bag 34 expanded with the cleaning operation.

An electric blower 41 is installed in the exhaust chamber 25 with its suction port facing the dust collecting chamber 24 side. In addition, 4
Reference numerals 2 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, so that the air passing through the dust collecting bag 34 in the dust collecting chamber 24 can be removed. It is sucked into the electric blower 41. Further, the exhaust chamber 25 houses a unitized code reel device 45 located behind the electric blower 41. 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.

As partially shown in FIGS. 2 and 4, etc., the electric blower 41 includes a stator, a diffuser screwed to one end surface of an iron core of the stator, and a fitting around the periphery of the diffuser. And a bearing bracket 51 screwed to the other end surface of the stator core, and a bearing (not shown) mounted on the bearing bracket 51 and the diffuser. A freely supported rotor, and the fan cover 50 connected to one end of a rotor shaft 52 of the rotor.
And a pair of brush devices having a carbon brush elastically pressed against a commutator (not shown) of the rotor 52. The vibration-proof 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.

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 guided into the inner surface of the fan cover 50 into the diffuser. The gas flows in from the inlet and flows out around the stator while being made static by the diffuser.

As shown in FIGS. 2 to 4, the electric blower 4
1, a cylindrical motor cover 53 made of synthetic resin or the like is fitted and attached to the outer peripheral portion of the diffuser so as to cover the stator and the bearing bracket. 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 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.

As shown in FIG. 2, a noise reduction member 61 is wound around the motor cover 53 on the outer peripheral surface of the cover 53, and the motor cover 53 and the noise reduction member 61 communicate with each other. One or more exhaust holes 53
a and 61a are open. These through holes 53a, 6
The inside of the motor cover 53 and the exhaust chamber 25 are communicated via 1a. An exhaust port 62 is opened on 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. This exhaust structure may be omitted, but by adjusting the balance between the blowing capacity of the electric blower 41 and the circulating air flow rate,
When the air recirculated in the suction port body 13 is collected, even if there is a blow-out of air from the suction port 92 described later, it is excellent in that it can be adjusted so as not to be too strong.

2 and 3, reference numeral 65 denotes the electric blower 4;
A switch for turning on and off the power supply to 1;
4 is a leak valve provided in a ventilation path that communicates with the outside of the main body case 21. This valve 66 is used to open when the vacuum pressure in the dust collection chamber 24 falls below a predetermined value and to introduce outside air into the dust collection chamber 24. 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.

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.

For example, a connection pipe 71 which is detachably inserted into the connection port 22 and communicates with the cleaner body 12 is shown in FIGS.
As shown in FIG. 7 and the like, an inner connection pipe 7 having both ends opened
5 and an outer connecting pipe 76 integrally and coaxially provided on the distal end side.

A cylindrical inner connecting pipe 75 longer than the outer connecting pipe 76 is inserted into the connecting port 22 and is connected to the port frame 34a.
Is brought into contact with a seal valve (not shown) provided therein to guide dust-containing air into the dust collecting bag 34. A pair of upper and lower stopper projections 77 and 7 are provided at the opening edge of the tip end of the inner connection pipe 75 projecting out of the main body case 21.
8 project outward.

The outer connecting pipe 76 having a short cylindrical shape and having a tapered portion whose diameter becomes gradually smaller toward the opening edge of the distal end portion, is provided with a reflux air between the inner connecting pipe 75 and one end in the axial direction. The mouth 76a is 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 at right angles to the axial direction and open outwardly. The peripheral wall of the return air outlet 76b is formed in an annular pivot cylinder portion 79.
Has made. Reflux air inlet 76a of outer connection pipe 76
Airtight sealing material 8 such as a synthetic rubber O-ring
0 is attached.

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. By insertion, the outer connection pipe 76 is fitted to the inner peripheral surface of the connection port 22, and airtightness between the outer connection pipe 76 and the inner peripheral surface is secured by the airtight seal member 80, and the outer 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 connected to a connection pipe 71 attached to the connection port 22.
Is communicated via the return air inlet 76a and the vent 22a which is in close proximity to the air inlet 76a.

The main body 72 of the suction opening is formed by connecting the main upper case 81 and the main lower case 82 by screws. As shown in FIGS. 6 and 9, a pair of rib-shaped bearing plates 83 are provided on the inner surfaces of the upper and lower cases 81 and 82.
Are projected, and the pivot shaft portion 79 is rotatably penetrated and supported by being sandwiched from above and below. 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 / separated from the stopper projection 77, and reference numeral 86 denotes a lower stopper which comes into contact with / separates from the stopper projection 78. The movement angle is regulated.

As shown in FIG.
The main lower case 82 is provided with partitions 87 and 88 that continuously cover the distal end opening of the inner connection pipe 75, and the lower surface of the lower partition 88 is open. A collection chamber 89 communicating with the inner connecting 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 a lower surface opening 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.

As shown in FIG.
The bottom wall 91 has an opposing outer surface 91a opposing and disposed in close proximity to the surface A to be cleaned. A U-shaped intake port 92 is formed in the main lower case 82 and opens in the outer surface 91 a, and the central portion of the intake port 92 faces the lower surface opening of the partition wall 88. Partition wall 8
8 is thicker than the other portions, and between the lower surface of the thicker end and the inner surface of the bottom wall 91, one side of the collection chamber 89 (the front side in the present embodiment). A return outlet 73 is located. The air returned into the blowing chamber 90 is blown out from the recirculation outlet 73 toward the collection chamber 89. Providing the thick end portion is excellent in that the length of the recirculation outlet 73 in the blowing direction can be increased to give directionality to the blown air.

The main lower case 82 is provided with a pair of guide walls 94 for guiding the air sucked into the collecting chamber 89 toward the collecting chamber 89 in a direction opposite to each other. A projecting wall 95 extending at a right angle is provided between the lower ends of the projections 94. The protruding wall 95 is formed by a part of the bottom wall 91. The provision of the protruding wall 95 increases the degree of vacuum and causes the suction port 13 to move from the surface A to be cleaned.
This is advantageous in that dust can be more reliably prevented from being blown off by blowing air from the intake port 92 when the air conditioner is released.

The wind direction changing mechanism 74 includes a wind direction changing body 100 and a coil spring 112 described later. FIG.
As shown in FIG. 9 and FIG. 9, the wind direction changing body 100 includes a pair of left and right swing arms 101 and these swing arms 101.
Direction control unit 1 provided by integrally connecting one end of the
02 and a slanted air guide plate 103 integrally protruding from the lower end of the wind direction control unit 102 toward the connection pipe 71. A pivot 104 projects from an intermediate portion between the two swing arms 101.

By individually fitting these pivots 104 into bearing holes 96 provided corresponding to the side surfaces of the air inlet 92, the wind direction changing body 100 is housed in the air inlet 92 as shown in FIG. A pivot 104 is provided on the lower surface of the main lower case 82.
Is mounted so as to be rotatable around the 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. Due to 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.

When the wind direction changing body 100 is located at the first control position, the lower end (front end) of the wind direction control unit 102, that is, the wind direction switching end 105, is located above the recirculation outlet 73 in the recovery chamber 89. A first outlet air passage 1 which is opposed from the side and is narrower immediately after the return outlet 73
06 is formed. 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 by using this as a guide. As shown in FIG. 7, the air is blown through the air inlet 92 in the direction of the surface A to be cleaned. When the wind direction changing body 100 is disposed at the second control position, the wind direction switching end 10
5 is moved to the same level or higher than the upper end of the recirculation outlet 73, and the second air outlet 5 is wider than the first air outlet 106.
A blow air path 107 is formed and arranged immediately after the recirculation blow port 73. That is, the recirculation outlet 73 is fully opened by the formation of the second outlet air passage 107. 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, In other words, the air is blown substantially parallel to the surface A to be cleaned.

The wind guide plate 103 may be omitted, but it is necessary to provide the wind 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 this vortex occurs, the air vortex is generated) Is generated, and the amount of air flowing toward the surface to be cleaned is reduced, and the amount of air blown out toward the surface to be cleaned can be secured.

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 opening main body 72 and rotatable rollers forming spacer means. The lower portions of the cleaning surface detection unit 108 and the roller 97 project below the outer surface of the bottom wall 91, and when they are in contact with the cleaning surface A, the cleaning surface A and the opposing outer surface 9.
1a, an external 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.

As shown in FIGS. 4 and 6, the main lower case 82 is provided with spring receiving portions 111 located on both left and right sides of the partition wall 88 and opened to the lower surface of the bottom wall 91. Have coil springs 112 as urging members.
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. 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 projection 11
Reference numerals 3 and 114 protrude from the inner surface of the ceiling wall of the spring receiving portion 111 and the swing arm 101 so as to face each other. Therefore, the positioning can be performed by bringing the stopper projections 113 and 114 into contact with each other.

Next, the operation of the suction opening 13 having the above-described structure and the operation of the vacuum cleaner 11 having 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.

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 connecting pipe 75 of the suction opening 13 is collected. The air captured by the bag 34 and passed through the dust collection bag 34 further passes through the filter support 35 and is sucked into the electric blower 41, and then is discharged to the reflux chamber 26 through the reflux port 54 of the motor cover 53. At the same time, a part thereof is discharged to the exhaust chamber 25 through the exhaust holes 61 and the holes 53a. Excess air discharged to the exhaust chamber 25 is discharged to the outside of the cleaner body 12 through the exhaust port 62.

On the other hand, the exhaust gas that has flowed into the recirculation chamber 26 flows from the vent 22 a of the connection port 22 to the outside connection pipe 76 of the connection pipe 71.
After being guided into the outlet chamber 76 of the suction port main body 72 from the return air outlet 76b of the outer connection pipe 76, the air is blown out from the return outlet 73 to the collection chamber 89 side, and this recovery is performed. It is sucked into the 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 described above, the air discharged from the electric blower 41 is collected and circulated by the suction port 13, and the external air is sucked into the suction port 92 of the suction port 13 through the external suction air passage 109 together with the dust. Can be cleaned.

FIG. 5A shows a state in which the suction opening 13 is moved along the surface A to be cleaned in such cleaning. In this case, the wind direction changing mechanism 74 is operated by the weight of the suction opening body 13 or the pressing operation force against the surface A to be cleaned.
As the cleaning surface detection unit 108 of FIG. 4 is pushed up against the cleaning surface A, the wind direction changing body 100
5 is rotated clockwise in FIG. 5 against the urging force of the coil spring 112, and is disposed at the first control position shown in FIG. Then, the wind direction switching end 105 of the wind direction control unit 102 is lowered to a position opposed to the upper part 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.

Therefore, as shown by the arrow of the recirculation wind in FIG.
The air blown out toward the wind direction switching end 1
05 guides in the direction of the surface A to be cleaned, and can be blown onto the surface A to be cleaned through the first outlet air passage 106 and the air inlet 92.

Accordingly, 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. In addition, since such a blowing of the return air to the surface to be cleaned is performed through the first outlet 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. Can be
Thereby, even heavy dust can be easily lifted up from the surface to be cleaned, sucked and cleaned.

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. Therefore, the wind direction switching end 105
Can be prevented from rubbing against the surface A to be cleaned and damaging the surface A to be cleaned such as the wind direction switching end 105 itself and the flooring floor. Moreover, 0.5 mm to 1.5 m is provided between the opposite outer surface 91a where the air inlet 92 is opened and the surface A to be cleaned.
Since the roller 97 and the surface-to-be-cleaned detection unit 108 are provided so as to secure the external suction air path 109 having a size of m, even if there is sand or the like on the surface A to be cleaned, it is prevented from being caught. Is done. Also in this respect, it is possible to prevent the surface to be cleaned A and the bottom wall 91 from being damaged. Since the roller 97 and the cleaning surface detection unit 108 are in rolling contact with the cleaning surface A,
Very rarely causes damage.

In addition, the external suction air passage 10 of the above size
By forming 9, the flow rate of the air sucked into the intake port 92 with the airflow blown out from the return outlet 73 and flowing is improved, and the performance of sucking the dust on the surface A to be cleaned is improved. Cleanability can be improved.

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 the state shown in FIG. 5B. That is, when the cleaning surface detection unit 108 does not detect the cleaning surface A (specifically, when the cleaning surface detection 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 control unit 102 is rotated around the pivot 104 as a fulcrum, the wind direction switching end 105 is disposed above the return outlet 73, and the return outlet 73 is fully opened.

As a result, the wind direction switching end portion 105 does not obstruct the flow of the return air from the return outlet 73 toward the recovery chamber 89 at the rear, and the return air is substantially parallel to the surface A to be cleaned. Is blown out so as to be substantially parallel to the opposing outer surface 91a, and this 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, a wide second airflow path 107 is provided between the wind direction switching end 105 and the front edge of the return air outlet 73.
Is formed, the flow velocity of the blown air is reduced, and the sound accompanying the blow can be reduced.

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 air inlet 92, while flowing in a direction other than the surface A to be cleaned. Can be recovered and circulated through the circulation path described above. 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. In addition, it is possible to suck the light dust on the surface of the sheet-like surface to be cleaned and to blow the airflow, thereby cleaning the surface.

When the suction port 13 is separated from the surface A to be cleaned while the electric blower 41 is operating as described above, the air blown out from the suction port 92 causes the air to be cleaned on the surface A to be cleaned. Since the air that flows in the other direction and is blown out from the suction port 92 can be extremely reduced to a practically negligible level, when the suction port body 13 approaches the cleaning target surface A and separates from the cleaning target surface A, No air is blown toward the surface to be cleaned. Therefore, it is possible to prevent the light dust on the surface to be cleaned A from being blown off.

Further, in the present embodiment, the wind direction changing body 100 is urged by the coil spring 112, so that the suction opening 13 is automatically brought into contact with and separated from the surface A to be cleaned as described above. Since the wind direction change body 100 can be moved between the first control position and the second control position, the position of the wind direction change body 100 can be selected without particularly requiring a manual operation for changing the wind direction, which is convenient for operation. It is.

As described above, even during cleaning, the direction of the wind can be changed in accordance with the contact and separation of the suction port body 13 with the surface A to be cleaned. It is not necessary to turn off the electric blower 41. 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. Therefore, a valve is provided in the air circulation path to prevent such blowout. 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.

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 as follows.
The structure of the recirculation outlet 73 and the wind direction changing body 100 and their interrelationships.

That is, in the second embodiment, the reflux outlet 73 is formed so as 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 in FIG.
As shown in FIG. 1 (B), it is arranged so as to be flush with the upper inclined inner surface 73a. The configuration other than the above is the same as that of the suction opening 13 and the vacuum cleaner 11 provided with the suction opening 13 according to the first embodiment, including portions not shown.

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. Moreover, the recirculation outlet 73 and the baffle plate 1
03 (or the inclined front end face of the wind direction switching end 105), the return air blown out from the return outlet 73 is substantially parallel to the surface A to be cleaned when it flows across the inlet 92. Irrespective of the spread of the return air when the return air crosses the intake port 92 toward the connection pipe 71, a part of the return air flows in the direction away from the surface to be cleaned. It is excellent in that it can be more reliably prevented from leaking to the outside and being sprayed on the surface to be cleaned.

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 between the third embodiment and the first embodiment is that
This is the structure of the wind direction switching end 105 of the wind direction control unit 102.

That is, in the third embodiment, the wind direction switching end portion 105 is opposed to the outlet of the return air outlet 73 when the wind direction changing member 100 is located at the first control position, and is connected to the return air outlet 73. And a guide surface 105a that directs the air blown out from the surface 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 that of the suction opening 13 and the vacuum cleaner 11 provided with the suction opening 13 according to the first embodiment, including portions not shown.

In the configuration of the third embodiment,
The same effects as those of the first embodiment can be obtained to solve the respective problems of the present invention. In addition, since the guide surface 105a is provided at the wind direction switching end portion 105, the return outlet 73
Is blown obliquely onto the surface A to be cleaned, so that the blown air hardly presses dust on the surface A to be cleaned and hinders its 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.

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 differences between the fourth embodiment and the first embodiment are as follows.
This is the structure of the wind direction switching end 105 of the wind direction control unit 102.

That is, in the fourth embodiment, when the wind direction changing body 100 is disposed at the first control position as shown in FIG. It has an inclination parallel to the surface to be cleaned A, and has an area larger than the plate thickness of the wind direction control unit 102 so as to be closely opposed to the surface to be cleaned A in a non-contact state. The configuration other than the above is the same as that of the suction opening 13 and the vacuum cleaner 11 provided with the suction opening 13 according to the first embodiment, including portions not shown.

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.

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, the coil spring 112 is used.
Instead of abolishing, the wind direction change body 100 may be moved by providing an operation unit linked to the wind direction change body 100 and manually operating the operation unit.

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 member such as a rotary brush may be used. A convex portion integrally projecting from the case 82 may be used.

Further, the present invention is not limited to the handy type vacuum cleaner and the suction port body for each of the above-described embodiments, but may include an upright type, a canister type, and other types of vacuum cleaners and a suction type therefor. Applicable to the mouth.

In each of the above embodiments, the suction port 13
The connection part 71 is communicated with the cleaner body 12 by directly inserting it into the connection port 22 and connecting it. However, by interposing a relay air path member such as a cylindrical pipe or a dust suction hose, this connection is performed. The connecting portion 71 may be indirectly communicated with the cleaner main body 12 via a member. In this case, the relay air path member may have a structure in which the reflux passage and the recovery passage are coaxially arranged and arranged in parallel.

[0086]

The present invention is embodied in the form described above and has the following effects.

According to the suction opening according to the first and third aspects of the present invention, the main portion is brought into contact with and separated from the surface to be cleaned by the wind direction changing means provided on the main portion of the suction opening. In doing so, the air blown out from the recirculation outlet toward the intake side is prevented from being blown out through the intake port, so that it is possible to suppress blowing off dust on the surface to be cleaned with the contact and separation. In order to prevent such blowing, there is no need to provide a motor control for turning off the electric blower of the cleaner body or to provide a valve in the air circulation path to open and close it.

According to the suction opening according to the second and third aspects of the present invention, in addition to the effects of the first aspect, a curtain and the like are provided. Without blowing the soft sheet-like surface to be cleaned or sucking it into the air inlet, it is possible to suck air dust flowing into the surface of the sheet-like surface to be cleaned and light dust on the surface. Therefore, it is suitable for cleaning a soft sheet-like surface to be cleaned such as a curtain.

According to the suction opening according to the fourth aspect of the present invention, which is dependent on any one of the first to third aspects, in addition to the effects of the first to third aspects, ,
The air blown from the recirculation outlet is blown to the surface to be cleaned by increasing the wind speed by passing through the narrow first airflow path, or is blown to the surface to be cleaned by passing the air through the wide second airflow path. Since it is possible to select to flow in a direction other than the above, it is possible to perform cleaning by adjusting the strength of the air flow exerted on the surface to be cleaned to the object to be cleaned.

The suction opening according to the fifth aspect of the present invention, which is dependent on any one of the first to fourth aspects of the present invention.
According to the suction opening according to the invention of claim 6 and the suction opening according to the invention of claim 7 dependent on the invention of claim 6, both are the same as those of the invention of claim 1. The effect of can be obtained.

The suction opening according to the invention of claim 8 to which the invention of any one of claims 5 to 7 belongs, and the suction opening according to the invention of claim 9 to which the invention of claim 8 depends. According to the present invention, in addition to the effects of the first aspect of the present invention, during cleaning, the tip of the airflow path changing body hits the surface to be cleaned and rubs the surface, or the surface between the surface to be cleaned and the opposing outer surface of the suction port body. It is possible to prevent the surface to be cleaned or the like from being damaged due to bites of sand particles or the like in between.

According to a tenth aspect of the present invention, there is provided an air circulation type vacuum cleaner capable of solving at least one of the first to fourth problems. it can.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the overall 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 are separated.

FIG. 2 is a longitudinal 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 vacuum cleaner main body 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. FIG. 3B is a vertical 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 disposed at a second control position.

FIG. 6 is a plan view showing a part of the configuration of the suction port 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 port 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 arranged at a first control position. (B) shows the configuration of the suction port body according to the second embodiment in which the wind direction changing body has the second configuration.
FIG. 4 is a vertical cross-sectional side view illustrating a state where the control position is set.

FIG. 12A is a vertical 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) shows the configuration of the suction port body according to the third embodiment in which the wind direction changing body has the second configuration.
FIG. 4 is a vertical cross-sectional side view illustrating a state where the control position is set.

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 disposed at a first control position. (B) shows the configuration of the suction port according to the fourth embodiment in which the wind direction changing body is the second.
FIG. 4 is a vertical cross-sectional side view illustrating a state where the control position is set.

[Explanation of symbols]

 11 ... vacuum cleaner, 12 ... vacuum cleaner body, 13 ... suction body, 24 ... dust collection chamber, 25 ... exhaust chamber, 26 ... recirculation chamber, 34 ... dust collection bag (filter), 41 ... electric blower, 53 ... Motor cover, 54 ... reflux port, 71 ... connection part (connection pipe), 72 ... suction port body main part, 73 ... reflux outlet, 74 ... wind direction change mechanism (wind direction change means), 75 ... inner connection pipe, 76 ... Outer connecting pipe, 91: bottom wall, 91a: opposed outer surface, 92: intake port, 97: roller (spacer means), 102: wind direction control unit, 105: wind direction switching end, 105a: wind direction switching end guide surface, θ: inclination angle of the wind direction switching end guide surface; 106: first blow air path; 107: second blow air path; 108: cleaning surface detecting section (spacer means); 109: external suction air path; 112: coil Spring Urging body).

Claims (10)

[Claims] An air blower provided in a cleaner main body is operated to operate the electric blower so that air is passed through a filter to capture dust. The air discharged from the electric blower through the filter is collected and circulated for cleaning. A suction port provided in a vacuum cleaner having a suction port, which is provided in close proximity to a surface to be cleaned and which is in close proximity to a surface to be cleaned, and which has a suction port for sucking air; A main body of the suction opening body having an opposed outer surface having the intake port opened on the outer surface; and the air provided at the main body of the suction port body located at one side of the air intake port for circulating air. A recirculation outlet, which is blown to the side, and is movably provided in the main part of the suction port body between a first control position and a second control position, and when the recirculation outlet is moved to the first control position, the recirculation outlet blows out. The air to be swept With directing the plane direction, and air deflecting means for directing the air discharged from the return air outlet when it is moved to the second control position in a direction other than the surface to be cleaned,
Suction body. 2. The air blown from the return outlet when the wind direction changing means is at the second control position flows in a direction substantially parallel to the surface to be cleaned or away from the surface to be cleaned. The suction opening body according to claim 1, wherein: 3. The suction port body according to claim 1, wherein the return air outlet is provided obliquely so as to blow air toward the connection portion. 4. A movement of the wind direction changing means to the first control position narrows a first airflow path formed immediately after the return air outlet and through which air flows toward the surface to be cleaned, and the second airflow path. By moving the wind direction changing means to the control position, a second outlet air path formed immediately after the return outlet and passing air in a direction other than the surface to be cleaned is wider than the first outlet air path. The suction opening according to any one of claims 1 to 3. 5. A cleaning surface detecting section for projecting said wind direction changing means from said opposed outer surface and pressed against said surface to be cleaned, said first direction being accompanied by the contact of said detecting portion with said surface to be cleaned.
The wind direction change body moved over a control position and a 2nd control position, and the biasing body which urges | biases so that this change body may be hold | maintained in the said 2nd control position was provided, It formed. The suction mouth body according to any one of claims 1 to 4. 6. A guide surface provided on said wind direction changing body for directing air blown from said return air outlet obliquely to a surface to be cleaned when said wind direction changing means is at said first control position. The suction opening body according to claim 5, wherein 7. An inclination angle of said guide surface when said wind direction changing means is at said first control position is set to 45 ° or more and less than 90 ° with respect to said cleaning surface. The inlet body described in the above. 8. 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 forms an external suction air passage with the surface to be cleaned. The suction port body according to any one of claims 5 to 7, wherein the suction port body is held at a height position that does not protrude from the opposing outer surface. 9. The suction port body according to claim 8, 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. 10. The operation of an electric blower in a main body of a vacuum cleaner sucks air from an air inlet of a suction port body arranged close to a surface to be cleaned, and captures dust by passing the sucked air through a filter. An air cleaner that returns air discharged from the electric blower through the filter to the air inlet, collects and returns the returned air, and performs cleaning while circulating the air. Any one of 1 to 9
An electric vacuum cleaner characterized in that it is the suction opening body described in the paragraph.