JP2000107096A - Suction nozzle and vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suction nozzle for an air circulation type vacuum cleaner, capable of reducing the rate at which dust or the like on a surface to be cleaned is blown away when it moves into and out of contact with the surface to be cleaned. SOLUTION: A suction nozzle 13 includes a suction nozzle main body part 102 having an intake port 129, a connecting pipe 101 rotatably connected to the rear of the main part 102, a circulation blowout port 103 located in front of the intake port 129 and provided at the main part 102, and an air direction control element (air direction changing means) 104 rotatably attached to the main part 102. The control element 104 with brush bristles (floor face detecting portions) 143 extending continuously in the cross direction of the main part 102 and located behind a rotational center P moves between a first control position and a second control position as the brush bristles 143 move into and out of contact with a floor face, thus directing circulating air to the first control position through the port 129 toward the floor face and to the second control position in a direction other than that of the floor face. The main part 102 in a tilted position prevents air from blowing through the nozzle to the rear.

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.

[0003] When the suction port is brought close to the surface to be cleaned during the air circulation type cleaning, or when the suction port is separated from the surface to be cleaned, the flow of circulating air may be unbalanced. Even so, it is necessary to prevent light dust and the like on the surface to be cleaned from being blown off by air blown out from the air inlet. The technology for that purpose is disclosed in Japanese Patent Application Laid-Open No. 9-23999.
No. 1993, which is hereby incorporated by reference.

[0004] That is, FIGS. 3 and 4 of the above-mentioned publication show that "open" when close to the floor surface and "close" when away from the floor.
Opening / closing valve, that is, a suction device for a vacuum cleaner having an opening / closing valve that has a projection through which the suction port of the suction device is inserted at both ends and is always urged in the closing direction by a spring, and is in close contact with the floor surface. It describes a suction device for a vacuum cleaner having a mechanism linked to a motor so as to be "in" when it is off and "off" when it is away.

[0005]

However, in the technique of turning off the motor when the suction body is separated from the floor (surface to be cleaned), the rotor continues to rotate due to inertia even after the motor is turned off. However, the circulating air cannot be stopped instantaneously. Therefore, immediately after the suction port body is separated from the surface to be cleaned, the balance of the circulating air may be disturbed and air may be blown out through the air inlet, and this air may cause light dust on the surface to be cleaned to be blown away. Easy to do and not very effective.

In addition, air that is recirculated by opening and closing an on-off valve provided in the suction port body is blown out from the suction port of the suction port body,
Alternatively, in the technique of stopping the blowing, the protrusion of the on-off valve is provided only at the longitudinal ends of the suction port extending in the width direction of the suction port body, so that the protrusion faces the surface to be cleaned and the cleaning surface. The function of partitioning the suction gap between the suction port body and the outer surface of the bottom wall can hardly be expected. That is, when the suction opening is brought into contact with or separated from the surface to be cleaned, and when the posture changes so that the front side of the opening rises as the suction opening is moved, the balance of air circulation is improved. If a part of the collapsed and circulating air is blown out from the air inlet toward the surface to be cleaned, the protrusion cannot effectively block the blown air. For this reason, there is a possibility that the blown air passes through the suction gap, and blows off light dust in and around the gap.

Further, in the air circulation type vacuum cleaner proposed so far, there is no example in which a suction port body is provided with a connecting portion rotatably connected to each other and a suction port main portion. For this reason, when the main body of the suction port body is inclined with respect to the surface to be cleaned due to the rotation of the two, measures are taken against the case where air is blown out from the suction port opened in the bottom wall of the main body of the suction port body. The example taken was not previously known.

Accordingly, a first problem to be solved by the present invention is to provide a suction port body which can suppress blowing off dust and the like on the surface to be cleaned when coming into contact with or separating from the surface to be cleaned.

A second problem to be solved by the present invention is as follows.
An object of the present invention is to provide an air circulation type vacuum cleaner that can solve the first problem.

[0010]

According to a first aspect of the present invention, there is provided a suction port body, wherein air sucked by an electric blower built in a cleaner main body passes through a filter to capture dust, and passes through the filter. It is assumed that the suction device is provided in a vacuum cleaner that cleans while collecting and circulating the air discharged from the electric blower, and that sucks air on the surface to be cleaned.

In order to solve the first problem, a suction port body according to the present invention has a suction port body having a suction port for suctioning air on an outer surface facing a surface to be cleaned. And a connection portion rotatably connected to the rear portion of the main portion so as to be turned upside down and communicated with the cleaner body side, and the suction port body positioned at one side of the suction port. A recirculation outlet that blows circulated air to the intake port side, and a cleaning surface detection unit that protrudes from the outer surface, with the detection unit coming into contact with or separating from the cleaning surface. The cleaning surface is attached to the main body of the suction port so as to move between the first control position and the second control position, and the air to be blown out from the return air outlet when moved to the first control position is the cleaning surface. And when it is moved to the second control position, Wind direction change control means for directing the air blown from the recirculation outlet to a direction other than the surface to be cleaned, and the cleaning surface detection unit is provided with a rotation center of the main body of the suction port body and It is characterized by being arranged behind the intake port. The surface-to-be-cleaned detector may be rigid or may have flexibility.

In the present invention, the air circulated from the main body of the cleaner to the suction port body is blown out from the circulating air outlet toward the suction port, and the air is sucked into the main body of the cleaner to be collected. From the dust suction generated in the suction port due to this air circulation, the air in the suction gap between the surface to be cleaned and the outer surface of the main body of the suction port opposite to the surface to be cleaned,
The air is sucked into the intake port facing this gap, and the air circulation cleaning can be performed.

The dust-absorbing force at the suction port in this cleaning is changed by the wind direction changing means having the surface-to-be-cleaned detecting unit which comes into contact with / separates from the surface-to-be-cleaned, as the surface-to-be-cleaned detecting unit comes into contact with the surface-to-be-cleaned. Automatically switched. That is, when the surface-to-be-cleaned detector comes into contact with the surface to be cleaned and is pushed and moved on this surface, the wind direction changing means is moved to the first control position, and the air blown out from the return air outlet is taken into the air inlet. Then, the dust is blown onto the surface to be cleaned, so that the dust on the surface to be cleaned is swept up, and the dust is sucked together with the air sucked into the air inlet. In a state where the wind direction changing unit does not substantially receive the pushing force from the surface to be cleaned, such as when the surface to be cleaned is not in contact with the surface to be cleaned, the changing unit is moved to the second control position. Therefore, the blowing of the air passing through the intake port is substantially eliminated. As a result, since it is not possible to expect the dust to be lifted up, the dust-absorbing power at the intake port is reduced, and it becomes difficult to suck light dust other than dust.

Since the connecting portion of the suction port body and the main portion of the suction port body of the present invention are rotatably connected at the rear of the main portion, the main portion of the suction port body is cleaned during cleaning. When trying to contact the surface, the main body of the suction port body is tilted forward and downward by its own weight, and in this state, first, the front part of the main body of the suction port body contacts the surface to be cleaned, and then continues. The main body of the suction port is rotated so that a suction gap of an appropriate size is formed between the outer surface of the bottom wall of the main body of the suction port and the surface to be cleaned. According to the behavior of the suction port body, the wind direction changing means is pushed and moved in contact with the surface to be cleaned via the surface to be cleaned detection unit, so that the wind direction changing means is moved to the first control position.

Therefore, when the main body of the suction opening body is tilted forward and the space between the rear part and the surface to be cleaned is larger than the space between the front side of the main body of the suction body and the surface to be cleaned, the wind direction changing means is not used. It can be held at the second control position. Therefore, it is possible to prevent the air from being blown from the air inlet toward the surface to be cleaned through the wind direction changing means. This can also be obtained when the main body of the suction opening body is to be separated from the surface to be cleaned during cleaning.

In implementing the first aspect of the present invention, like the suction opening according to the second aspect of the present invention, the cleaning surface detecting portion is continuous in the width direction of the suction opening main body. It may be provided so as to extend.

In the present invention, the surface-to-be-cleaned detecting portion that is in contact with the surface to be cleaned can be used as a windbreak wall. Thereby, when air is blown out toward the surface to be cleaned through the air inlet when the main body of the suction port body is moved toward and away from the surface to be cleaned, and when the suction port body is pushed forward, When the front part of the main body is in an oblique posture that floats up, or when the main body of the suction port body is pulled backward, even if the rear part of the main body of the suction port body is in a forward tilted posture that floats, The air that is blown out is blocked by the surface-to-be-cleaned detection unit, so that it is possible to prevent air from flowing backward behind the detection unit.

In carrying out the second invention,
Like the suction opening according to the third aspect of the present invention, the recirculation outlet may be provided in front of the intake and air may be blown rearward from the outlet. .

In the present invention, when the wind direction changing means is moved to the first control position and the circulating air is blown toward the surface to be cleaned through the suction port, the blown air flow is mainly in the blowout direction of the return blowout port. An attempt is made to pass through the intake port on the downstream side, that is, toward the rear of the main portion of the intake port body. However, as described above, since the surface to be cleaned forming a windbreak wall is provided on the downstream side in the blowing direction, the flow of the blowing air passing through the intake port is blocked by this detecting unit, and Air blow-through can be prevented.

In the electric vacuum cleaner according to the present invention, the air on the surface to be cleaned is sucked from the suction port of the suction port by the operation of the electric blower in the cleaner body, and the sucked air is passed through the filter. It is assumed that an electric vacuum cleaner is configured to capture dust, return air discharged from the electric blower through the filter to the air inlet, and collect and return the returned air for cleaning while circulating.

In order to solve the second problem, a vacuum cleaner according to a fourth aspect of the present invention provides the vacuum cleaner according to any one of the first to third aspects. It is characterized by having a mouth.

Therefore, this air circulation type vacuum cleaner is provided with the suction opening according to the invention of any one of claims 1 to 3, so that any one of the above inventions can be provided.
The effects of the invention described in the above item can be obtained as described above, and therefore, an air circulation type vacuum cleaner that can solve the first problem can be provided.

[0023]

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.

The cleaner body 12 having the handle 12a on the rear upper surface is formed by connecting a pair of upper and lower or left and right synthetic resin body cases 21 by screws or the like. A connection port 22 whose one end is exposed at a front end surface inclined forward is attached to a front portion of the main body case 21. The suction port body 13 is detachably inserted and attached to the connection port 22. The connection port 22 has a stepped cylindrical shape with a large diameter portion and a small diameter portion connected to each other, and a plurality of ventilation holes 22a are circumferentially spaced on a wall surface that borders the small diameter portion and the large diameter portion. Is provided.

As shown in FIG. 2, the inner surfaces of the two main body cases 21 are integrally provided with required partitioning ribs whose leading ends come into contact with each other as they are connected. Inside is a dust collection chamber 23 at the front,
It is partitioned into an intermediate exhaust chamber 24, a rear reel accommodating section 25, and a recirculation chamber 26 below the main body case 21, which forms a return air passage extending below the dust collection chamber 23 and the exhaust chamber 24. The upper surface of the dust collection chamber 23 located on the front side of the exhaust chamber 24 is opened, and this opening is airtightly closed by a case lid 27 which is detachably attached to the upper front part of the main body case 21.

As shown in FIG. 2, the front wall of the dust collection chamber 23 is formed as a filter mounting portion 28, and the vicinity of the upper end of the filter mounting portion 28 is manually pressed against the force of a spring 29 by an arrow in FIG. A filter holder 30 that is rotated in a direction about a pivot 30a is attached. The dust-collecting bag 31 made of a paper pack as a filter which is housed in the dust-collecting chamber 23 so as to be able to be taken in and out is housed in the dust-collecting chamber 23 by attaching the flat frame 31a to the filter attaching part 28 by the filter holder 30. Have been. At the rear of the dust collecting chamber 23, a filter support 32 having a number of elongated vent holes is provided.
The filter support 32 supports the rear surface of the dust bag 31 that has been expanded with the cleaning operation.

An electric blower 35 is installed in the exhaust chamber 24 with its suction port facing the dust collection chamber 23 side. 36, 3
Reference numeral 7 denotes a vibration-proof motor supporting rubber fitted to both front and rear ends of the electric blower 35. The partition rib 38 located at the boundary between the exhaust chamber 24 and the dust collection chamber 23 has an opening 38a facing the suction port, thereby passing through the dust collection bag 31 in the dust collection chamber 23. Air blower 35
Sucked into.

The electric blower 35 is provided with an electric blower and a motor cover 39 attached to the blower, which will be described later. That is, as shown in FIG. 2, the electric blower includes a stator 35a, a diffuser 35c screwed to a bearing bracket 35b fixed to one end surface of an iron core of the stator 35a, and a peripheral portion of the diffuser 35c. Fan cover 35d fitted and fitted and having the suction port
A bearing bracket 35e screwed to the other end surface of the stator core and a rotor 35f rotatably supported over bearings respectively attached to the bracket 35b;
A pair of a centrifugal fan 35g connected to one end of the rotor shaft of the rotor 35f and covered with a fan cover 35d, and a pair of carbon brushes (not shown) having a carbon brush elastically pressed against a commutator 35h of the rotor 35f. A brush device.

Therefore, the electric blower unit includes a diffuser 35c and a centrifugal fan 35g, and a fan cover 35d.
A motor unit composed of components other than the air blower, such as the stator 35a and the rotor 35f, protrudes downstream of the air blower housed inside the motor. The motor support rubber 36 is fitted on the outer peripheral surface of the fan cover 35d. The portion other than the bearing mounting portion 35i of the bearing bracket 35e has, for example, a four-column structure, and the brush device is mounted on two of the column portions.

During operation of the electric blower 35, the air in the dust collecting chamber 23 sucked into the centrifugal fan 35g from the suction port is discharged from around the fan 35g, and then guided by the inner surface of the fan cover 35d. Diffuser 3
The diffuser 35c flows into the inside of the motor 5c from the inlet at the outer peripheral portion thereof, and flows out toward the periphery of the stator 35a of the motor unit while being made static by the diffuser 35c.

As shown in FIG. 2, the motor cover 39 of the electric blower 35 is formed of a synthetic resin in a cup shape and covers a portion of the electric blower downstream of the diffuser 35c. The cover 39 has its opening edge fitted to the outer peripheral portion of the fan cover 35d. An end of the motor support rubber 36 on the diffuser 35c side is sandwiched between the two covers 35d and 39 to hermetically seal the gap therebetween. On the peripheral wall of the motor cover 39, for example, a thermostat (not shown) for preventing an excessive rise in temperature is attached as a temperature sensor for thermally protecting the cleaner body 12 against exhaust air from the electric blower 35. At the same time, a plurality of exhaust holes 41 (only one is shown) communicating the inside of the motor cover 39 and the exhaust chamber 24 are opened.

A bearing mounting portion 35i of the bracket 35e penetrates a hole provided at the center of the bottom wall of the motor cover 39, and the motor support rubber 37 is formed on an outer surface of the mounting portion 35i.
Are fitted. The electric blower 35 having the motor cover 39 has a motor support rubber 36 at both front and rear ends thereof.
In a state in which the partition ribs 37 are fitted, the partition ribs 38 are inserted between the partition ribs 45 and the partition ribs 38 that define the boundary between the exhaust chamber 24 and the reel housing portion 25. Note that such support is provided for each of the pair of main body cases 21 as the vacuum cleaner main body 12 is assembled.

As shown in FIG. 2, a cord reel 51 for supplying power to the electric blower 35 is accommodated in the reel accommodating portion 25. A plurality of exhaust ports 52 are provided on the rear wall of the cleaner body 12. A portion of the exhaust port 52 located on the rear wall 21a of the cleaner body 12 is a rear wall 21a.
In order to use as a leg when the cleaner main body 12 is placed upright on the floor with its side facing down, it is opened to a leg projection 53 projecting from the outer surface of the rear wall 21a. The exhaust port 52 and the exhaust chamber 24 communicate with each other via a tunnel-shaped exhaust path (not shown) formed along the outer surface of the cord reel 51. This exhaust path is effective for preventing exhaust air from blowing out from a not-shown cord passage portion of the main body case 21 through which the power cord of the code reel 51 passes. 21
In the case where the exhaust chamber 24 is provided,
In the air-circulation type vacuum cleaner in which the and the reel accommodating chamber 25 are completely separated by ribs or the like, the above-described structure for exhausting air from the cleaner body 12 to the outside can be omitted.

As shown in FIG. 2, a rectangular tubular air outlet 55 having a much larger opening area and a shorter opening area than the exhaust hole 41 is integrally formed on the periphery of the motor cover 39 so as to project downward. A rubber packing 56 is fitted into the outlet 55. The air outlet 55 is air-tightly connected to a hole 58 provided in a partition rib 57 for partitioning the reflux chamber 26. Therefore, the inside of the motor cover 39 and the rear end of the cleaner main body 12 in the reflux chamber 26 are communicated via the air outlet 55.

In FIG. 1 and FIG. 2, reference numeral 59 denotes a switch for turning on / off the power supply to the electric blower 35. Further, 60 is opened when the vacuum pressure in the dust collecting chamber 23 located on the suction side of the electric blower 35 falls below a predetermined value to open the outside air to the dust collecting chamber 2.
3 is a leak valve to be introduced into.

Next, the suction port 13 will be described with reference to FIGS. The suction port body 13 includes a connection pipe 101 serving as a connection portion that communicates with the cleaner body 12 side,
The apparatus includes an inlet body main portion 102, a recirculation outlet 103, and a wind direction control body 104 as wind direction changing means. All components other than springs described later are molded products of synthetic resin.

As shown in FIGS. 7 and 8, the connecting pipe 101 which is detachably inserted into the connecting port 22 and communicates with the cleaner body 12 has an inner connecting pipe 105 having both ends opened.
And an outer connecting pipe 106 provided integrally and coaxially on the distal end side.

A cylindrical inner connection pipe 105 longer than the outer connection pipe 106 is inserted into the small diameter portion of the connection port 22 to be provided with a rubber seal valve (not shown) of the port frame 31a,
Alternatively, a rubber seal valve (not shown) fitted to the end of the connection port 22 on the side of the dust collection chamber 23 is pushed open to guide the air containing dust into the dust collection bag 31. A pair of upper and lower stopper projections 107, 10
8 project outward.

The outer connection pipe 106 is inserted into the large-diameter portion of the connection port 22, and forms a return air introduction port 106 a at one end in the axial direction with the inner connection pipe 105. A pair of left and right return air outlets 106b are formed at the other end in the axial direction of the outer connection pipe 106 at right angles to the axial direction and open toward the outside. The peripheral wall of these return air outlets 106b has an annular pivot cylinder 1
The outer peripheral surface of the tubular portion 109 is integrally provided with a flange 110 which is continuous in the circumferential direction. An airtight seal member 111 such as an O-ring made of synthetic rubber is attached to the outer peripheral surface of the outer connection pipe 106 on the side of the return air introduction port 106a. In FIG. 7, reference numeral 112 denotes a claw integrally protruded from the outer connection pipe 106.

As shown in FIG. 2, the connection pipe 101 is inserted until the outer connection pipe 106 hits the wall surface of the connection port 22 where the ventilation hole 22a is opened. Is secured to the inner peripheral surface by the hermetic seal member 111, and is rotated in the circumferential direction in this state.
The nail 112 passing through the ventilation hole 22a is hooked on the wall surface having the ventilation hole 22a and attached to the main body case 21.
The hook 112 prevents the connection port 22 from coming off the suction port body 13, and the return chamber 26 and the inside of the outer connection pipe 105 communicate with the return air introduction port 106 a and the airflow port that is close to and opposed to the return air introduction port 106 a. It is communicated via the pore 22a.

As shown in FIGS. 3 and 4, the main body 102 of the inlet body comprises an upper case 121 and a lower case 122.
Are connected to each other and connected by screws 120. A pair of bearing plates 123, 124 each formed of a rib having a semicircular recess are integrally provided on the inner surfaces of the rear portions of the upper and lower cases 121, 122, respectively. Each is sandwiched from above and below and is rotatably supported. With this support structure, the connection pipe 101 is pivotably attached to the rear part of the suction port body main part 102 so as to be vertically turned up and down.
The main body 102 of the mouth body can be obtained with a proper posture with respect to the surface to be cleaned by the rotation of 02. Connection pipe 1
The rotation of the main body portion 102 of the suction opening body with respect to the vertical direction is restricted by the stopper protruding edges 107 and 108, and the flange 110 and the bearing plate 12
The mating surfaces with the reference numerals 3 and 124 are in sliding contact with each other. In FIG. 7, P indicates the center of rotation of the connection pipe 101 and the main body 102 of the suction port.

As shown in FIG. 7, the suction port main body 10
The interior of 2 is partitioned into a collection chamber 127 communicating with the inner connecting pipe 105 by partitions 125 and 126 that are continuous with each other, and a blowout chamber 128 surrounding the collection chamber 127 except for an opening on the lower surface thereof. As shown in FIG.
Reference numeral 5 denotes a rib which is integrally provided at the center in the width direction of the inner surface of the main part upper case 121 so as to extend over the pair of left and right bearing plates 123 and faces the front end opening (entrance end) of the inner connection pipe 105. . The recovery chamber 127 is communicated with an intake port 129, and the outlet chamber 128 is communicated with the return air outlet port 106b. The air inlet 129 is provided in the bottom wall 122 a of the main lower case 122 facing the surface to be cleaned.

The partition 126 is composed of the upper and lower cases 12
The suction port body 102 is made of a synthetic resin plate formed separately from the main body 1 and 122, and is arranged over substantially the entire width of the front portion of the suction port main body 102. The upward rear edge formed at the center of the partition 126 is fitted into the lower edge of the partition 125 asperities, and the downward rear edges on both sides of the upward rear edge are formed in the main lower case 121. Asperities are fitted to the partition edges from above.

The use of a separate partition 126 for partitioning the two chambers 127 and 128 requires that a portion corresponding to the partition 126 be divided into the main upper and lower cases 12.
1 and 122, it is not necessary to integrally mold them, so that the structure of these molds can be simplified and the molding can be facilitated, and the lower edge of the partition 126 and the bottom wall can be easily formed. In the case where the size and the like of the return outlet 103 formed between the inner surface of the front edge portion 122b and the inner surface of the return outlet 122b need to be changed in a minor change or the like, it is excellent in that the partition 126 can be easily replaced to replace the size. ing. In FIG. 4, reference numeral 121a denotes a partition 126.
Upper case 1 to hold down and fix the
21 is a boss integrally protruding from the inner surface of the boss 21.

The return outlet 103 is formed on one side (the front side in the present embodiment) of the recovery chamber 127, and is returned from the outlet 103 into the outlet chamber 128 to return to the partition 1.
The air flowing using the 26 and the main part upper case 121 as a guide is blown out toward the collection chamber 127 side. Note that FIG.
In FIG. 6 and FIG. 7, reference numeral 131 denotes a first downward brush bristle which is implanted as a spacer means at the periphery of the bottom wall 122a except for a front edge portion 122b thereof, and which has flexibility. Surface to be cleaned and air inlet 12
9, a predetermined narrow suction gap is formed.

At the bottom of the main body 102 of the suction port, the magnitude of dust suction generated at the suction port 129 is indicated by
The wind direction control body 104, which is controlled by changing the blowing direction of the air blown from the third, is attached.

That is, as shown in FIGS. 3 and 6, the wind direction control body 104 is formed by a front frame of a control body 141 formed of synthetic resin into a frame shape.
42, and a second brush hair 143 as a detection unit for detecting the surface to be cleaned is protruded downward from the rear frame. The second brush bristles 143 that are located behind the intake port 129 and the center of rotation P and that are provided corresponding to the longitudinal center of the recirculation outlet 103,
Although not limited thereto, the suction opening main body 102 extends in the width direction and is densely continuous, and has a longer protruding length downward than the first brush bristles 132 and is soft. The pivots 144 are respectively provided on both side frames of the control body 141.
Are protruded integrally.

The second brush bristles 132 are attached directly below the inlet end of the connection pipe 101, and the main body 1 of the suction port body
The length extending in the width direction of 02 is longer than the maximum opening width in the left-right direction of the entrance end. In particular, in the present embodiment, the length is slightly longer than the distance between the tip ends of the pair of pivot barrel portions 109, so that the second brush bristles 132 try to blow through to the rear of the suction port main portion 102. You are crossing the expected path of air. In the case where the second brush bristles 132 having the above arrangement are not provided, since the suction port body 13 has the pair of pivot cylinder portions 109 forming the return air outlet port 106b, the air from the suction port 129 is discharged. The blowout is concentrated at the center in the width direction of the main body 102 of the suction opening body, and blows out directly below the inlet end side of the connection pipe 101 in the suction gap.

As shown in FIG. 3 to FIG. 6, the wind direction control plate portion 142 has a relatively steeply inclined wind direction changing portion 142a at the front end thereof, which is inclined obliquely backward toward the lower side. And the slope portion 142a
Guide section 1 that projects rearward from the lower end of the slope
42b. In particular, the wind guide portion 142b
The central portion in the longitudinal direction, that is, the portion 142c facing the inlet end of the inner connection pipe 105 facing the intake port 129,
It projects toward the inlet end, and its rear end is curved upward in an arc shape. Providing such a wind guide portion 142b is not suitable for the return outlet 1
It is excellent in that the air blown out from the nozzle 03 can be smoothly guided toward the entrance end, and the windage loss due to the vortex can be reduced.

On the other hand, bottom wall 122a of main lower case 122
As shown in FIG.
Recess 1 communicating with intake port 129 at both ends in the width direction
51 are formed. This recess 151 is provided in the control body 1
A pair of bearings 153 each having a bearing hole 152 are formed in the bottom wall 122a facing the recess 151, respectively. The wind direction control body 104 is rotatably attached to the pair of pivots 144 by fitting the pair of pivots 144 into the bearing holes 152 of the bearing 153, respectively.

The wind direction control body 104 is a main part lower case 122.
The second brush bristles 143 always protrude from the outer surface of the bottom wall 122a. A pair of left and right springs 154 as urging members are sandwiched between the rear frame portion of the wind direction control body 104 and the bottom wall 122a, and the second brush bristles are urged downward by the springs 154. 143
Is not in contact with the surface to be cleaned.
Are obliquely held at the second control position shown in FIG.

In FIGS. 3, 6, and 7, reference numeral 155 denotes a flexible third brush bristle which is close to the rear side of the second bristle 143 and is implanted on the outer surface of the bottom wall 122a. The brush bristles 155 are provided with the same protruding height and strength as the first brush bristles 131. The provision of the brush bristles 155 is such that when the suction opening 13 is brought into contact with the surface to be cleaned, the pressing force of the suction opening 13 against the surface to be cleaned is received together with the first brush bristles 131, and the second brush bristles 143 are received.
It is excellent in that excessive deformation of can be prevented. Reference numeral 156 shown in FIGS. 3 and 6 and the like denotes a velvet-shaped flat cleaning body brushed diagonally toward the front side, and is located just behind the intake port 129 and attached to the outer surface of the bottom wall 122a.
The cleaning body 156 captures dust when the suction port body 13 moves forward, and releases the already captured dust when retracting.

Next, the operation of the air circulation type vacuum cleaner 11 having the suction port 13 having the above-described structure will be described. As shown in FIG. 2, the vacuum cleaner 11 is connected to the connection port 22 of the cleaner body 12 with the connection pipe 101 of the suction port body 13 inserted thereinto.
Power is supplied to the electric blower 35 via the power cord rewinded from the code reel 51 while the whole is held, and the blower 35 is operated by being used.

In this use, dust contained in the suction air (indicated by the dotted arrow in FIGS. 2 and 7) flowing into the dust collection bag 31 through the inner connection pipe 105 of the suction opening 13 is collected. The air captured by the bag 31 and passed through the dust bag 31 is further sucked into the electric blower 35 through the filter support 32, and then discharged to the reflux chamber 26 through the air outlet 55 of the motor cover 39. At the same time, a part thereof is discharged to the exhaust chamber 24 through the exhaust hole 41.

The exhaust gas thus flowing into the recirculation chamber 26 is introduced into the outer connection pipe 106 of the connection pipe 101 from the ventilation hole 22a of the connection port 22, and is sucked from the pair of return air outlets 106b of the outer connection pipe 106. After being led out to the outlet chamber 128 of the mouth body main part 102, the air is blown from the return outlet 103 to the inlet 129 side, in other words, to the recovery chamber 127 side facing the inlet end of the inner connecting pipe 105 of the connecting pipe 101. Is sucked into the cleaner body 12 via the inner connection pipe 105. Such an air flow is indicated by solid arrows in FIGS. As the air discharged from the electric blower 35 is collected and circulated by the suction port body 13 as described above, dust in the suction gap between the bottom wall 122a of the suction port body 13 and the surface to be cleaned is generated by the force. Inlet 129 with air
As it is sucked into the air, it is possible to perform air circulation type cleaning.

During such cleaning, a part of the air in the motor cover 39 is discharged as described above.
Therefore, the exhaust chamber 24 is filled with exhaust gas. The exhaust gas thus filled in the exhaust chamber 24 is discharged to the outside of the cleaner main body 12 from an exhaust port 52 formed in the rear wall 21a of the cleaner main body 12 through an exhaust path (not shown).

Next, the wind direction control body 104 during cleaning.
Will be described.

When the suction opening 13 is away from the surface to be cleaned, the wind direction control body 104 is held at the second control position shown in FIG. 7A by the urging force of the spring 154. In this second control position, the wind direction control plate portion 142 of the wind direction control body 104 is located above the reflux outlet 103 in the collection chamber 127, so that the air blown backward from the reflux outlet 103 is subjected to wind direction control. The air is blown out in a direction other than the surface to be cleaned, for example, rearward substantially in parallel with the surface to be cleaned, without blowing on the sloped portion 142a forming the front end of the plate portion 142. In other words, the air is blown toward the inlet end of the connection pipe 101 so as to form an airflow substantially parallel to the surface to be cleaned that does not go downward from the intake port 129, and is sucked into the inner connection pipe 105.

As described above, the air blown out and collected substantially parallel to the surface to be cleaned flows while spreading somewhat, but does not blow out to the outside through the suction port 129. From the mouth 103 to the inner connecting pipe 10
The dust collecting force generated in the intake port 129 by the force of the air collected in the air conditioner 5 is smaller than that in a case where the wind direction control body 104 is disposed at a first control position described later. In addition, since the momentum of the air collected as described above is lower than that in the case where the wind direction control body 104 is disposed at the first control position described later, the sound accompanying the air blowing is small and low. Can drive with noise.

When the suction opening 13 is pressed against the surface to be cleaned, the second brush bristles 143 as the surface to be cleaned detection portion of the wind direction control body 104 come into contact with the surface to be cleaned and receive a pushing force. Then, the wind direction control body 104 is rotated about the pivot 144 against the urging force of the spring 154, and the control body 141 is disposed at the first control position shown in FIG. 7B. Although the second brush bristles 143 have flexibility, they are dense and provided in a belt-like shape, so that the second brush bristles 143 can transmit a pushing force of the surface to be cleaned.

At the first control position, the wind direction controller 141
The wind direction control plate part 142 is disposed so as to approach the intake port 129 and face the slope portion 142 a to the recirculation outlet 103. Therefore, the air blown backward from the recirculation outlet 103 blows the slope portion 142a of the wind direction control plate portion 142 and is guided obliquely downward, so that the air blows downward from the intake port 129 to be cleaned on the surface to be cleaned. The light is reflected and sucked into the collection chamber 127 again from the suction port 129 together with the air in the suction gap between the bottom wall 122a and the surface to be cleaned, and subsequently sucked into the inner connection pipe 105.

In this case, the gap between the slope portion 142a of the wind direction control plate portion 142 and the recirculation outlet 103 is narrowed, so that the flow velocity of the air blown to the surface to be cleaned through the inlet 129 increases. Therefore, it is possible to obtain an effect of digging dust from a surface to be cleaned such as a carpet,
Even relatively heavy dust on the surface to be cleaned can be blown up. In other words, due to the good momentum of the air collected from the recirculation outlet 103 to the inner connection pipe 105, the dust-absorbing force generated at the intake port 129 moves to the second control position shown in FIG. It is larger than the case where the control body 104 is arranged.

When the main body 102 of the suction opening is lightly pressed against the surface to be cleaned, the first and third brush bristles 13
1 and 155 function as stoppers to form the suction gap equal to the length of these protrusions and perform air circulation cleaning. However, from this stage, the suction port main body 102 is more strongly covered as necessary. When pressed against the cleaning surface, the suction gap can be further narrowed with the flexible deformation of each of the brush bristles 131, 155.

As described above, the dust-absorbing force at the air inlet 129 in the air circulation type cleaning is controlled by the rotatable wind direction control body 104 having the second brush bristles 143 that come into contact with and separate from the surface to be cleaned. It is automatically switched with the contact and separation of the surface. Therefore, when the suction port body main part 102 of the suction port body 13 is brought close to the surface to be cleaned and when the suction port body main part 102 is moved away from the surface to be cleaned, even if the balance of the circulating air may be lost, With the intake 129
From the air can be prevented from being blown out.

The suction port 13 is connected to the connecting pipe 1.
01 and the suction port main body 102 are configured to be rotatably connected at the rear portion of the main section 102, so that the suction port main body 102 tries to contact the surface to be cleaned during cleaning. In this case, the suction port body main part 102 is inclined forward and downward due to its own weight.
02 is in contact with the surface to be cleaned, and then the suction port body is formed so that a suction gap of an appropriate size is formed between the outer surface of the bottom wall 122a of the suction port main body 102 and the surface to be cleaned. The main part 102 is rotated. And such a suction port body 1
According to the behavior of No. 3, the second brush bristles 143 as the surface-to-be-cleaned detection unit are pushed up in contact with the surface to be cleaned, so that the wind direction control body 104 is moved to the first control position.

Therefore, the state in which the suction port body main portion 102 is tilted forward as described above and the space between the rear portion and the surface to be cleaned is wider than the space between the front side of the suction port body main portion 102 and the surface to be cleaned. Then, the wind direction control body 104 is kept held at the second control position. Therefore, it is possible to prevent the air from being blown from the air inlet 129 toward the surface to be cleaned through the wind direction control body 104. As a result, dust on the surface to be cleaned can be prevented from being blown to the surroundings.

Similarly, the situation in which the main body of the suction opening body 102 tilts forward by its own weight is caused when the main body of the suction opening body 102 is to be separated from the surface to be cleaned during cleaning, and when the suction main body 13 is moved backward. In some cases, dust can be prevented from being blown away by blowing air rearward in such a case.

When the second brush bristles 143 are provided on the front side with respect to the rotation center P, the suction port main body 102 is inclined forward, and the space between the rear portion and the surface to be cleaned is sucked. In a state in which the opening is larger than the front side of the mouth body main portion 102 and the surface to be cleaned, the wind direction control body 104 is in the first control position via the second brush bristles 143 that are pushed up in contact with the surface to be cleaned first. Therefore, the air that hits the slope portion 142a and passes through the intake port 129 blows backward and blows away dust, and the problem of the present invention cannot be solved.

Further, since the second brush bristles 143 are provided continuously extending in the width direction of the suction port main body 102, the brush bristles 143 can be used as windproof walls. That is, when the main body of the suction opening body is brought into contact with or separated from the surface to be cleaned, the air is blown toward the surface to be cleaned through the air inlet 129 by temporarily blowing against the wind direction control plate portion 142. In the situation, since the second brush bristles 143 are in contact with the surface to be cleaned, the brush bristles 143 can block the air that tends to flow backward along the surface to be cleaned.
Accordingly, it is possible to prevent air from blowing backward from the second brush bristles 143 and scattering of dust on the surface to be cleaned.

The suction opening 13 is pushed and moved along the surface to be cleaned during cleaning. However, when the suction opening 13 is pushed forward, the suction opening 13 is directed obliquely upward and rearward from the diagonally upper rear. Since a force is applied, the front portion of the suction port main body 102 may be in an oblique posture such that it rises. When this occurs, the second brush bristles 143 are strongly pressed against the surface to be cleaned, and the wind direction control body 104 is held at the first control position. Is sprayed. However, in this case as well, the air blown toward the surface to be cleaned is blocked by the second brush bristles 143 as in the case described above, and air blows backward from the brush bristles 143 and the surface to be cleaned accompanying the bristles. The scattering of the upper dust can be prevented.

Further, when the wind direction control body 104 is at the first control position, air circulating rearward from the return outlet 103 on the front side of the inlet 129 through the inlet 129 is blown. The air flow is mainly on the downstream side in the blowing direction of the return outlet 103, that is,
An attempt is made to pass through the air inlet 129 toward the rear of the main body 102 of the air inlet body. However, since the second brush bristles 143 forming a windproof wall are provided on the downstream side in the blowout direction as described above,
The flow of the blown air passing through the nozzle 9 can be blocked to prevent dust and the like from being blown off on the surface to be cleaned on the downstream side of the return outlet 103 in the blowing direction.

The present invention is not limited to the above embodiment. For example, the cleaning surface detection unit 143 is not limited to brush bristles,
It may be made of a hard protruding portion integrally protruded from the first portion, or a rotatable roller extending in the width direction of the suction port main portion 102 may be used. The use of brush bristles or rollers as the surface-to-be-cleaned detection unit is excellent in that the surface to be cleaned and the like are less likely to be damaged. Further, the surface-to-be-cleaned detector 143 does not necessarily need to extend continuously in the width direction of the suction port main body 102, but may be provided at intervals.

The present invention can also be applied to a canister type air circulation type vacuum cleaner.

[0074]

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

According to the suction opening according to the first aspect of the invention, when the suction opening main body is moved toward and away from the surface to be cleaned, the suction opening main body is rotated by its own weight or the like to be inclined. Despite taking a posture, along with the fact that air can be prevented from being blown from the air inlet of the main part toward the surface to be cleaned by the wind direction changing means, on the surface to be cleaned behind the main part of the suction port body Dust can be prevented from being blown to the surroundings. In particular, according to the suction opening body according to the second and third aspects of the invention, the suction opening main body is inclined and air is blown on the surface to be cleaned. Since the cleaning surface detection unit that detects the surface to be cleaned and operates the wind direction changing unit serves as a windbreak wall, it is possible to prevent dust on the cleaning surface from being blown to the surroundings behind the cleaning surface detection unit.

According to the air circulation type vacuum cleaner according to the fourth aspect of the present invention, since the suction port according to any one of the first to third aspects is provided, the first problem can be solved. There is.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the entirety of a hand-held air circulation type vacuum cleaner according to a first embodiment of the present invention in a state where a cleaner body and a suction port body are separated.

FIG. 2 is a vertical side view showing the entire vacuum cleaner shown in FIG. 1 in a state where a suction opening is connected to a vacuum cleaner main body.

FIG. 3 is a perspective view showing the suction opening of the vacuum cleaner shown in FIG. 1 as viewed from the lower surface side;

FIG. 4 is an exploded perspective view showing the configuration of the suction port shown in FIG. 3;

FIG. 5 is a perspective view showing the configuration of the suction port shown in FIG. 3 in a state where a main part upper case is removed and a part is cut away.

FIG. 6 is an exploded perspective view showing a main case lower case of the suction opening body shown in FIG. 3 and a wind direction control body pivotally attached thereto.

FIG. 7A is a vertical sectional side view showing a configuration of the suction opening body shown in FIG. 3 in a state separated from a surface to be cleaned. (B) is FIG.
FIG. 4 is a longitudinal sectional side view showing a configuration of the suction port body shown in FIG.

FIG. 8A is a side view showing a configuration of a connection pipe provided in the suction port shown in FIG. 3; (B) is WW in FIG. 8 (A).
Sectional drawing shown along a line.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 ... Electric vacuum cleaner, 12 ... Vacuum cleaner main body, 13 ... Suction port body, 21 ... Main body case, 31 ... Dust collection bag (filter), 35 ... Electric blower, 101 ... Connection pipe (connection part), 102 ... Suction port Main body part, 103: reflux outlet, 104: wind direction control body (wind direction changing means), 109: pivot cylinder part, 122a: bottom wall, 123, 124: bearing plate, 127: collection chamber, 128: blow chamber, 129 ... intake port, 141 ... control body main body, 142 ... wind direction control plate, 142a ... slope part, 143 ... second brush bristles (cleaning surface detection part), 144 ... pivot part 153 ... bearing part, 154 ... spring (attached) P): rotation center.

Claims (4)

[Claims] An air blower incorporated in a cleaner body passes dust through a filter through a filter to collect dust, collects air discharged from the electric blower through the filter, and performs cleaning while circulating. A suction port body provided in an electric vacuum cleaner having a suction port for sucking air on the surface to be cleaned, the suction port body having a suction port for sucking air into an outer surface facing the surface to be cleaned; A connection portion rotatably connected to the rear of the suction device and communicating with the cleaner body side; and a circulation portion provided at the suction port main portion located at one side of the suction port. A recirculation outlet for blowing air to the intake port side; and a cleaning surface detection unit protruding from the outer surface. 2
Attached to the suction port body main part so as to move over the control position, and while moving to the first control position, directs the air blown out from the recirculation outlet toward the surface to be cleaned, Wind direction change control means for directing air blown out from the return outlet when moved to the second control position in a direction other than the surface to be cleaned; and A suction port body disposed at a rotation center of the main portion of the suction port body and at a rear side of the suction port. 2. The suction port body according to claim 1, wherein the surface-to-be-cleaned detecting portion is provided so as to extend continuously in the width direction of the main body of the suction port body. 3. The suction port body according to claim 2, wherein the recirculation air outlet is provided in front of the air inlet, and air is blown rearward from the air outlet. 4. The operation of the electric blower in the cleaner body sucks air on the surface to be cleaned from the suction port of the suction port body, passes the sucked air through a filter to capture dust, and passes through the filter. And returning the air discharged from the electric blower to the suction port, and recovering and circulating the returned air to perform cleaning while cleaning the suction port. Any one
An electric vacuum cleaner comprising the suction port body described in the item.