JP2000107101A - Suction port body, and electric vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suction port body for an air circulation type vacuum cleaner, which can suppress the blowing out of air from the air inlet even when a flexible surface to be cleaned such as a sheet is sucked into the air inlet. SOLUTION: On one side of a suction port main portion 102 having an air inlet 129, a reflux outlet port 103 which blows out air to be circulted to the air inlet side is provided. On the opposite side from the reflux outlet with the air inlet as a border, a connecting pipe 101 which communicates with the vacuum cleaner main body side is provided. An air direction control plate portion (suction guide) 142 which guides the air which moves from the reflux outlet to the internal connecting pipe 105 of the connecting pipe 101, by a confronted surface 142bf to the air inlet 129, is provided, and on the confronted surface 142bf, a bypass passage 134 is provided. Even when a flexible surface to be cleaned such as a sheet is sucked through the bypass passage 145, the stream of air from the air outlet 103 to the internal connecting pipe 105 is ensured through the bypass passage 145, and the air is prevented from blowing out from the air inlet 129.

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] In the suction port body provided in this vacuum cleaner,
As shown in FIGS. 3 and 4 of Japanese Patent Application Laid-Open No. 9-23999, an open / close valve that opens when it is in close contact with the floor surface and that closes when it is away from the floor surface, that is, suction devices at both ends Is known which has an opening / closing valve which is always urged in the closing direction by a spring.

[0004] The suction port body sucks dust from the suction port by opening the opening / closing valve. In this case, the opening / closing valve is used as a suction guide, and one face of the suction port faces the suction port. It is excellent in that it can guide the air blown out from one side to the other side across the intake port.

[0005]

However, the structure provided with the suction guide as described above has the following problems. That is, when the object to be cleaned is not the floor, but a soft cleaning surface such as a sheet, a tablecloth, or a curtain having a weak waist, a portion of the soft cleaning surface facing the air inlet is sucked into the air inlet. The suction guide may be sucked on the surface of the suction guide facing the intake port. In such a situation, the sucked portion of the soft cleaning surface blocks the flow of air through the suction port body, so that the air sent into the suction port body seeks a refuge, and then passes through the suction port through the suction port. With the air blown out of the body, there is a high possibility that the surrounding light dust will be blown off.

Accordingly, a first object of the present invention is to provide a suction port body capable of suppressing air from being blown out from the suction port even if a soft cleaning surface is sucked into the suction port.

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

[0008]

According to a first aspect of the present invention, there is provided a suction port body, wherein the suction port body according to the first aspect of the present invention filters air sucked by an electric blower incorporated in a cleaner body into a filter. It is assumed that the suction port is provided in a vacuum cleaner that captures dust through the filter, collects air discharged from the electric blower through the filter, and performs cleaning while circulating.

In order to solve the first problem, a main body of a suction port body having a suction port for sucking air on an outer surface opposite to a surface to be cleaned, and one side of the suction port. A recirculation outlet provided in the main body of the suction port for discharging circulated air to the side of the intake port; and a main part of the main body of the suction port located on the opposite side of the recirculation outlet from the intake port. And a connecting portion that communicates with the cleaner body side, and is provided to face the air inlet during cleaning, and guides air from the recirculation outlet to the connecting portion at a surface facing the air inlet. And a suction guide having a bypass passage for the facing surface.

[0010] In the present invention, the air circulated from the main body of the suction port to the main body of the cleaner is blown out from the circulating air outlet to the side of the suction port, and the air is supplied to the main body of the cleaner via the connection portion. Since the air is sucked and collected, 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 is generated by the dust-absorbing force at the air inlet associated with the air circulation. The air can be cleaned through the air intake port facing the gap. In this air circulation type cleaning,
The suction guide facing the intake port guides air and dust that are blown out from the return outlet and collected in the connection part by the facing surface facing the intake port, and sucks air and the like into the connection part. Can be smoothed.

By the way, in the air circulation type cleaning, when a soft cleaning surface such as a sheet is sucked into the suction port, the sucked portion is sucked to the opposing surface of the suction guide facing the suction port. And obstructs the flow of air from the return outlet to the connection. However, even in this state, the bypass passage of the suction guide is not blocked, so that the flow of air from the return outlet to the connection portion can be secured through this passage.

In practicing the first invention, the bypass passage may be formed by one or more grooves provided on the facing surface, as in the suction opening according to the second aspect of the invention. . According to the present invention, the air flowing from the outlet to the connection portion through the bypass air passage formed of the groove faces the soft cleaning surface sucked to the opposite surface of the suction guide, and sucks dust on the soft cleaning surface. It is excellent in that it can be used.

[0013] In carrying out the second invention,
The groove may be provided obliquely as in the suction opening according to the third aspect of the present invention. According to the present invention, as the main body of the suction opening is moved onto the soft cleaning surface, a wide area for sucking the dust of the soft cleaning surface facing the soft cleaning surface sucked to the opposite surface of the suction guide is secured. It is excellent in that it can efficiently absorb dust.

According to a fourth aspect of the present invention, in the electric vacuum cleaner, 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 port according to the invention of any one of claims 1 to 3, so that any one of the inventions according to any one of claims 1 to 3 can be provided.
The effects of the invention of the item can be obtained as described above.

[0017]

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 a 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, the leading ends of which are brought 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 collecting chamber 23 is formed as a filter mounting portion 28, and the upper end of the filter mounting portion 28 is manually operated 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 collecting chamber 23. 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 includes an electric blower and a motor cover 39 which will be described later, which is attached to the blower. 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 side 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 on the downstream side. 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 is inserted through 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 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 through 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 is provided with a connection pipe 101 serving as a connection part communicating with the cleaner body 12.
, An inlet main body 102, a reflux outlet 103,
There is provided a wind direction control body 104 as a wind direction changing means, and all the components other than the spring described later are molded products of synthetic resin.

As shown in FIGS. 8 and 9, a connecting pipe 101 removably inserted into the connecting port 22 and communicated 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 connecting pipe 105 longer than the outer connecting pipe 106 is inserted into a small diameter portion of the connecting 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 between one end in the axial direction and 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 the figure, 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 and 124 made of ribs having semicircular recesses are integrally provided on the inner surfaces of the rear portions of the upper and lower cases 121 and 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. 8, P indicates the center of rotation of the connection pipe 101 and the main body 102 of the suction port.

As shown in FIG. 8, the suction port main body 10
2, a continuous partition 125 and a middle partition 12
6 and a collection chamber 127 communicating with the inner connecting pipe 105.
And a blowout chamber 128 surrounding the recovery chamber 127 except for an opening on the lower surface thereof. As shown in FIG. 4 and the like, the partition 125 is formed of a rib integrally projecting over a pair of left and right bearing plates 123 at the center in the width direction of the inner surface of the main case upper case 121.
5c. 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 middle partition 126 is composed of the upper and lower cases 12 of the main part.
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 in the center of the middle 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. The upper and lower edges are fitted to the partition edge 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 molds can be easily molded.
When it is necessary to change the size of the return outlet 103 formed between the lower edge of the bottom wall 122a and the inner surface of the front edge portion 122b of the bottom wall 122a in a minor change or the like, the middle partition 126 is replaced. It is excellent in that it can be easily dealt with. Then, as shown in FIG. 10 and the like, a wind-shielding convex portion 126 a made of a rib or the like protrudes from the rear surface at the center in the longitudinal direction of the partition 126. FIG.
The middle 121a is a boss integrally protruding from the inner surface of the main case 121 to press and fix the partition 126 from above.

The recirculation outlet 103 is formed at one side (the front side in the present embodiment) of the recovery chamber 127.
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.
6 to 8, reference numeral 131 denotes a first downward brush bristle which is implanted as a spacer means at the periphery of the bottom wall 122 a except for a front edge portion 122 b 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 FIG. 3, FIG. 6 to FIG. 8, etc., the wind direction control body 104 is a wind direction control plate as a suction guide by a front frame portion of a control body main body 141 formed of a synthetic resin in a frame shape. In addition to forming the portion 142, the second brush bristles 143 as a detection portion for detecting the surface to be cleaned are protruded downward from the rear frame portion. The second brush bristles 143 that are provided behind the intake port 129 and the rotation center P and that are provided corresponding to the longitudinal center portion of the recirculation outlet 103 are not limited to this.
The suction port 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. Pivot parts 144 are integrally formed on both side frames of the control body 141, respectively.

The second bristle 132 is connected to the inner connecting pipe 10.
The length of the main body 102 of the suction port body 102 extending in the width direction is longer than the maximum opening width of the entrance 105c in the left-right direction. 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, and thereby, the second brush bristles 13
Numeral 2 crosses the expected path of the air that is going to blow through to the rear of the main body 102 of the inlet body. In the case where there is no second brush bristles 132 arranged as described above, the suction port 1
3 has a pair of pivot cylinders 109 forming the return air outlet 106b, so that the air blowout from the inlet 129 is concentrated at the center in the width direction of the inlet body main part 102, and the air is blown out in the suction gap. Inlet 105 of connection pipe 105
Concentrate just below c and blow through.

As shown in FIG. 8, the wind direction control plate 14
2 is a slope portion 142 for changing the direction of the wind at a relatively steep angle, which is inclined toward the rear as it goes downward at its front end.
a and a wind guide portion 142b protruding rearward from the lower end of the slope 142a.
And In particular, the central portion in the longitudinal direction of the wind guide portion 142 b, that is, the intake port 12 of the inner connection pipe 105.
A central portion facing the entrance 105c facing the projection 9 protrudes toward the entrance end 105c, and a rear end thereof 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 air blown out from the nozzle 03 can be smoothly guided toward the inlet 105c, and that windage loss due to vortices can be reduced.

Wind direction control plate 14 as suction guide
Numeral 2 faces the air inlet 129, and an opposing surface 142bf (see FIG. 3) facing the air inlet 129 is provided with one or more bypass passages 145 for the surface 142bf. As shown in FIG.
5 is formed on the lower surface of the central portion of the wind guide portion 142b, for example, by a groove between a plurality of adjacent rib-shaped bulging portions 146 provided diagonally to the front-rear direction of the suction port main body 102. I have. Therefore, the bypass air passage 145 formed of this groove is also provided obliquely like the rib-shaped bulging portion 146.

On the other hand, the bottom wall 122a of the main lower case 122
As shown in FIG.
2, a recess 151 communicating with the air inlet 129 is formed at both ends in the width direction. The recess 151 is formed of a groove having a shape slightly larger than the shape of the control body 141 excluding the front frame portion, and a pair of bearing portions 153 each having a bearing hole 152 in the bottom wall 122a facing the recess 151 are provided. Each is formed. 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.
Is obliquely held at the second control position shown in FIG.

In FIGS. 3 and 6 to 8, reference numeral 155 denotes a third flexible 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. Also, FIG.
Reference numeral 156 shown in FIGS. 6 to 8 and the like denotes a velvet-shaped flat cleaning body brushed toward the oblique front side, which 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, the dust contained in the suction air (indicated by the dotted arrow in FIGS. 2 and 8) flowing into the dust bag 31 through the inner connecting pipe 105 of the suction port 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 connecting pipe 106 of the connecting pipe 101 from the vent hole 22a of the connecting port 22, and is sucked from the pair of recirculating air outlets 106b of the outer connecting 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 collection chamber 127 where the inlet 105 c of the inner connecting pipe 105 of the connecting pipe 101 faces. Is sucked into the cleaner body 12 via the inner connection pipe 105. Such a flow of air 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. The air is sucked into the intake port 129 together with the air, so that the air circulation cleaning can be performed.

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 separated from the surface to be cleaned, the wind direction control body 104 is held at the second control position shown in FIG. 8A 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 out to the inlet 105c side of the inner connection pipe 105 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 air inlet 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 of the wind direction control body 104 as the surface to be cleaned detection contact 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 arranged at the first control position shown in FIG. 8B. 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.

In 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, since the gap between the inclined surface portion 142a of the wind direction control plate 142 and the recirculation outlet 103 is narrowed, the flow velocity of the air blown to the surface to be cleaned through the intake port 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 connecting pipe 105, the dust suction force at the inlet 129 is reduced to the second control position shown in FIG. It is larger than the case where 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.

Further, in the air circulation type cleaning when the blow-out control body 14 is disposed at any of the above-described control positions and the like, the wind direction control plate 142 facing the air inlet 129.
Is blown out from the reflux outlet 103 by the facing surface 142bf facing the air inlet 129, and
It is needless to say that the air and dust collected in the inner connecting pipe 105 can be guided to smoothly suck the dust into the inner connecting pipe 105. Wind direction control plate 14
It is excellent in that the air flowing along 2 can be rectified.

Next, a case in which the vacuum cleaner 11 cleans freely deformable soft cleaning surfaces such as sheets and table cloths will be described. This cleaning is performed in the same manner as a normal floor cleaning, but in this case, a part of the soft cleaning surface may be sucked into the air inlet 129. When such a situation is reached, the sucked soft cleaning surface is placed in the inlet 129.
The air flows from the reflux outlet 129 to the inlet 105c of the inner connection pipe 105 of the connection part 101, so as to stick to the lower side and adhere to the lower surface of the wind direction control plate 142 arranged at the first control position. Will interfere.

However, the wind direction control plate 142 has a bypass passage 145 on the lower surface thereof, and this passage 145 is not blocked even when the soft cleaning surface is sucked into the air inlet 129. Therefore, even in the above state, the flow of air in the suction opening body 13 is not interrupted by the soft cleaning surface sucked between the suction opening 129 and the wind direction control plate 142, and the return air outlet through the bypass passage 145. The flow of air from 103 to the inlet 105c of the inner connection pipe 105 can be secured. Therefore, it is possible to prevent the air sent into the suction port body 13 from blowing out below the front part of the suction port body 13 through the suction port 129 in search of an escape place, and to blow off light dust around the air port. Can be prevented.

Further, since the air can be circulated in the suction opening body 13 through the bypass passage 145 as described above, the action of sucking the soft cleaning surface sucked into the suction opening 129 is reduced. Even in the suction state of the soft cleaning surface, it is possible to relatively easily clean the suction opening body 13 by sliding the suction opening body 13 along the soft cleaning surface.
In addition, the bypass passage 145 formed of a groove is
In this case, the suction port 13 can be moved more easily by reducing the resistance.

When the suction opening 13 is slid along the soft cleaning surface for cleaning as described above, the bypass passage 145 formed of a groove faces the soft cleaning surface sucked into the air inlet 129. The air circulating through the bypass passage 145 can suck dust on the soft cleaning surface. Further, in this case, a bypass air passage 145 composed of a groove is provided obliquely together with the bulging portion 146 (note that a plurality of bypass air passages 14 are provided as shown in FIG. 7).
5 was inclined in opposite directions so as to form a C-shape toward the inlet 105c of the inner connection pipe 105), so that the suction port body 13 was moved in a state where the soft cleaning surface was sucked into the suction port 129. When the cleaning is performed by sliding along the soft cleaning surface, the path of movement of the bypass air passage 145 with respect to the soft cleaning surface can be increased. In other words, it is possible to secure a wide area for absorbing dust on the soft cleaning surface facing the soft cleaning surface, which is advantageous in that dust can be efficiently absorbed.

When the bypass air passage 145 is functioning effectively as described above, the air passage resistance of the soft cleaning surface sucked into the air inlet 129 reduces the suction force spread to the inner connecting pipe 105. Accordingly, the vacuum pressure in the recovery chamber 127 increases, so that the air blown out from the reflux outlet 103 passes through a slight gap between the wind direction control plate 142 and the middle partition 126 and the wind direction control plate 142 and the middle partition 126. (A part of the recovery chamber 127) is sucked without passing through the intake port 129 side (this air flow is referred to as a back-side bypass flow). If the amount of air sucked into the collection chamber 127 by such a back side bypass flow is large, the amount of air passing through the bypass air passage 145 decreases, resulting in a decrease in cleaning performance.

However, the inner surface of the middle partition 126 is provided with a wind-shielding convex portion 126a projecting from the rear surface side of the wind direction control plate portion 142, and the convex portion 126a narrows the cross-sectional area of the flow path of the back side bypass flow. In addition, the amount of air sucked into the recovery chamber 127 by the back side bypass flow can be suppressed. For this reason, a large amount of air passes through the bypass air passage 145, so that it is possible to prevent a reduction in dust absorption performance.

In order to reduce the cross-sectional area of the back side bypass flow, the wind shield convex portion 126a may be provided on the back surface of the wind direction control plate portion 142 so as to protrude toward the inner surface side of the partition 126. . Alternatively, it can be provided on both the back surface of the wind direction control plate 142 and the inner surface of the partition 126,
In this case, the two wind-shielding convex portions 126a may be provided such that their tips face each other, or may be provided such that their positions are shifted back and forth.

In the suction port body 13 of the present embodiment, the second brush bristles 14 as the surface-to-be-cleaned detecting section provided continuously extending in the width direction of the main body 102 of the suction port body.
When air is blown out from the air inlet 129 during cleaning, 3 can be used as a windproof wall against the air. That is, when the main body 102 of the suction opening is brought into contact with or separated from the surface to be cleaned such as a floor, the air is blown toward the surface to be cleaned through the air inlet 129 by temporarily blowing against the wind direction control plate 142. In this situation, the second bristles 143 are in contact with the surface to be cleaned.
43 can block the air that tends to flow backward along the surface to be cleaned. Thereby, the second brush bristles 14
3, it is possible to prevent the blow-by of air to the rear of the inlet main body 102 and the scattering of dust on the surface to be cleaned.

Moreover, the second brush bristles 14 having flexibility
In a situation where a step or a projection on the surface to be cleaned is partially in contact therewith, only the portion can be flexibly deformed so as to escape the step or the like.
Irrespective of the contact of the brush bristles 143, the entire brush bristles 143 are not pushed and moved, and the appropriate size of the brush bristles 143 is provided between the surface to be cleaned and the outer surface of the bottom wall 122a of the suction port main body 102 opposed thereto. Until the suction gap S is formed, the blowing control body 104 can be held at the second control position even if there is a step on the surface to be cleaned, and a large dust-absorbing force is not generated in the suction port 129 due to this. Therefore, even if the balance of the circulating air may be lost, a part of the circulating air passes through the intake port 129 and the main body 102 of the suction port body.
To blow off dust and the like on the surface to be cleaned.

The present invention is not limited to the above embodiment. For example, the bypass air passage may be formed by a tunnel-shaped wind tunnel provided independently of the lower surface (the surface facing the intake port) of the wind direction control plate portion, instead of the groove.

Further, in the present invention, the suction guide
It may be one that opens and closes the intake port, or one that does not approach or move away from the intake port as it comes into contact with or separates from the surface to be cleaned as in the above-described embodiment, and may be one that is immovably provided. Good.

In the present invention, the connecting portion may be provided so as not to be rotatable with respect to the main portion of the suction port body. In the present invention, the blowing control body may be omitted, and the present invention is also applicable to a canister-type air-circulating vacuum cleaner.

[0072]

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

According to the suction port body according to the first to third aspects of the present invention, the suction guide for guiding the flow of air from the reflux outlet to the connection portion is provided with a soft cleaning of sheets and the like through the suction port. Even if the surface is sucked, the flow of air from the return outlet to the connection portion can be secured through the bypass passage of the suction guide, so that the air can be prevented from being blown out from the inlet.

According to the air circulation type vacuum cleaner according to the fourth aspect of the present invention, since the suction opening 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. 7 is a bottom view showing the suction port shown in FIG. 3 with its connection pipe removed;

FIG. 8A is a vertical sectional side view showing the configuration of the suction port 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. 9A 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.

FIG. 10 is a perspective view showing the configuration of a middle partition of the suction port body shown in FIG. 4 as viewed from the back side thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 ... Electric vacuum cleaner, 12 ... Vacuum cleaner main body, 13 ... Suction port body, 31 ... Dust collection bag (filter), 35 ... Electric blower, 101 ... Connection pipe (connection part), 102 ... Suction port main part, 103 ... reflux outlet, 105 ... inner connection pipe, 105a ... inner of inner connection pipe, 122a ... bottom wall, 127 ... collection chamber, 128 ... blow-out chamber, 129 ... intake port, 142 ... wind direction control plate (suction guide), 142b: wind guide portion; 142bf: facing surface; 145: bypass air path.

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 a vacuum cleaner having a suction port body having a suction port for sucking air on an outer surface facing a surface to be cleaned; and a suction port located at one side of the suction port. A return outlet that is provided in the mouth body main portion and blows out circulated air to the intake port side; and is provided in the suction port body main portion on the opposite side of the return outlet from the intake port. A connecting portion communicating with the cleaner body side, provided to face the air inlet at the time of cleaning, and guiding air from the recirculation outlet to the connecting portion on a surface facing the air inlet, Buy for opposing surface And a suction guide having a pass passage. 2. The device according to claim 1, wherein said bypass passage is provided on said opposed surface.
The suction port body according to claim 1, wherein the suction port body is formed by the groove. 3. The suction opening according to claim 2, wherein the groove is provided obliquely. 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.