JP3482139B2 - Suction port body and vacuum cleaner - Google Patents

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 body provided in the vacuum cleaner.

[0002]

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

In the conventionally proposed air circulation type vacuum cleaner, there is no example in which the suction mouth body is provided with a connecting portion and a suction mouth body main portion which are rotatably connected to each other. As illustrated in Japanese Patent Publication No. 24643-246, the conventional suction port body cannot rotate. By the way,
The suction port body shown in FIG. 1 of the above publication is directed to the main part of the suction port body, which is non-rotatable and has the entire lower surface as an intake port, with the air returned from the cleaner body side facing the surface to be cleaned. This is a configuration in which a recirculation outlet that blows out and an intake pipe that sucks in and collects the air that has been blown out from the outlet from the inlet are provided.

[0004]

However, the suction port body for the air circulation type electric vacuum cleaner disclosed in the above publication recirculates into the recovery chamber in which the lower surface is the suction port and the suction pipe is connected to the upper portion. Due to the structure where the outlet is arranged, the piping member that forms the return outlet serves as a flow path resistance for the air from the intake port to the intake pipe, and the dust absorption performance is not good, and a comparison is made among the inhaled dust. There is a problem that extremely large dust is easily caught by the piping member.

Therefore, in order to solve these problems, the present inventor has recently developed the following suction inlet. This suction port body is provided with a connection portion that communicates with the main body of the vacuum cleaner side and that circulates air in and out, and a suction port body main portion provided at the rear portion thereof, and the connection portion is the suction port body main portion. A return air passage having a pair of left and right return air passage outlets is provided outside the inner connecting pipe having an inlet opening directly behind the intake opening opened in the bottom wall.

According to this suction port body, since there is no flow path resistance between the intake port and the inlet, the above-mentioned problem can be solved. Further, the air recirculated from the cleaner main body side to the main body of the suction inlet body is diverted to the left and right into the main body of the suction inlet body from the pair of left and right return air passage outlets of the return air passage, so that the suction inlet body is Air is supplied from both sides in the longitudinal direction to the recirculation outlet that is formed in the width direction of the main portion and faces the front side of the intake port, and the air is blown from the recirculation outlet to the intake port side. Is excellent in that the suction port can be made uniform in the width direction of the main body.

[0007] However, as a result of a test by the present inventor using the above suction inlet, it was found that there are the following improvements.
That is, as described above, the air is diverted to the left and right in the main body of the suction port body and the air is returned, so that in the portion facing the upstream side of the circulation port, the circulation port is discharged from both sides in the width direction of the main body of the suction port body. Since the air supplied to the air collides with each other, it becomes impossible to properly control the blowing direction of the air blown from the recirculation outlet to the inlet side due to the influence of the turbulent flow caused by the collision. As a result, there is a high possibility that air will be blown out to the surface to be cleaned through the air inlet and light dust on the surface to be cleaned will be blown to the surroundings.

Therefore, a first problem to be solved by the present invention is to obtain a suction port body capable of improving the dust suction performance and suppressing dust clogging during dust suction and blowing of dust on the surface to be cleaned. It is in.

A second problem to be solved by the present invention is
An object is to obtain 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 in which air sucked by an electric blower incorporated in a cleaner body is passed through a filter to capture dust and passed through the filter. It is assumed that a suction port provided in an electric vacuum cleaner that collects air discharged from the electric blower and cleans it while circulating it.

In order to solve the first problem, the suction port body according to the invention of claim 1 has a suction port body main portion having an intake port for sucking air on the outer surface facing the surface to be cleaned. A recirculation outlet that is located on one side of the intake port and extends in the width direction of the main body of the intake port to blow out the circulated air to the intake port side; A connection part provided on the suction port body main part, which is located on the opposite side of the reflux outlet, and communicated with the cleaner body side, and the connection parts project in opposite directions so as to face back. Inside the outer connecting pipe having a pair of return air passage outlets, an inner connecting pipe for suction having an inlet facing the intake port is provided, and between the both connecting pipes, the main body of the suction port is provided. A return air passage communicating with the inside is formed, and in the main portion of the suction port body. The wind guide to divide the air flowing into the serial reflux air outlet in the longitudinal direction central portion of the return air outlet, is characterized in that provided adjacent to the upstream side of the return air outlet.

In the present invention, the air recirculated from the cleaner main body side to the main body of the suction port first passes through the return air passage formed between the inner and outer connecting pipes of the connecting portion, and the pair of return air After being branched to the right and left by the road outlet and returned from these outlets into the main portion of the suction port body, it is blown out to the intake port side from the recirculation outlet provided in the main portion of the suction port body. Then, this blown air is sucked into the inner connecting pipe of the connecting portion through its inlet, is sucked into the cleaner body side, and is collected. Therefore, as the air circulates through the suction port through the above path, the air in the suction gap between the surface to be cleaned and the outer surface facing the surface to be cleaned of the main part of the suction port,
The air circulation type cleaning can be performed by suctioning from the intake port facing this gap.

In this cleaning, since the inlet of the inner connecting pipe for collecting the air blown out to the intake port faces the intake port, the dust sucked into the intake port together with the collected air is directly connected to the inside. It can be sucked into the pipe, and at that time, the risk that relatively large dust is caught and clogged can be extremely reduced.

Moreover, since the air returned into the main portion of the suction port body is diverted by the pair of return air passage outlets as described above, the diverted air of the two systems is fed to the reflux outlet so as to face each other. From both ends in the longitudinal direction, in other words, supplied from both sides in the width direction of the main portion of the suction mouth body,
It is blown out from the reflux outlet. By the way, since a wind guide is provided adjacent to the upstream side of the reflux outlet in the main portion of the suction port body, by this guide, as described above, the two systems that flow to face each other and are supplied to the reflux outlet are provided. Each of the air streams can be independently blown from the reflux outlet. That is, 2 supplied to the reflux outlet
It is possible to prevent the air in the system from colliding with each other, thereby suppressing the occurrence of turbulent flow that disturbs the direction of the air blown from the recirculation outlet.

In carrying out the invention of claim 1,
According to a second aspect of the present invention, the wind guide may be obliquely provided so as to guide the air toward the center of the main portion of the suction port body in the width direction. This is advantageous in that, in addition to the effect of the invention of claim 1, it is possible to suppress the occurrence of turbulent flow due to the collision of the air flows of the two systems with the wind guide.

In carrying out the first or second aspect of the invention, as in the case of the third aspect of the invention subordinate to these aspects of the invention, in addition to the action of the first or second aspect of the invention, the suction is performed. A space between the pair of left and right wind guides located in the central portion of the main body of the mouth in the width direction may have a wind shield structure for the reflux outlet. With this configuration, regardless of the turbulent flow generated due to the collision of the two systems of air in the upper part of the pair of wind guides in the central part in the width direction, the air whose blowing direction is not controlled by this turbulent flow, It is excellent in that it is possible to prevent the air from being blown out from the central portion in the width direction of the reflux outlet through the pair of wind guides.

In the electric vacuum cleaner according to a fourth aspect of the present invention, the air on the surface to be cleaned is sucked through the suction port of the suction port body by the operation of the electric blower in the vacuum cleaner body, and the sucked air is passed through the filter. It is premised on an electric vacuum cleaner that captures dust, returns the air that has passed through the filter and is discharged from the electric blower to the intake port, and collects and circulates the returned air to perform cleaning.

In order to solve the fourth problem, in the vacuum cleaner according to the invention of claim 4, the suction port body is sucked in according to any one of claims 1 to 3. It is characterized by having a mouth.

Therefore, this air circulation type vacuum cleaner is provided with the suction port body according to the inventions of claims 1 to 3, so that the invention according to any one of the inventions of claims 1 to 3 is provided. The effect can be obtained as described above.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below with reference to FIGS. As shown in FIGS. 1 and 2, the handy type air circulation type electric vacuum cleaner 11 according to the first embodiment includes a cleaner main body 12 and a suction port body 13.

The cleaner main body 12 having the handle 12a on the upper surface of the rear portion is formed by connecting a pair of upper and lower or left and right synthetic resin main body cases 21 by screwing or the like. At the front part of the main body case 21, a connection port 22 whose one end is exposed is attached to the front end face which is inclined forward. The suction port body 13 is detachably inserted and attached to the connection port 22. The connection port 22 has a stepped cylindrical shape in which a large-diameter portion and a small-diameter portion are connected to each other, and a plurality of ventilation holes 22a are circumferentially arranged on the wall surface that defines the boundary between the small-diameter portion and the large-diameter portion. Is provided for the purpose.

As shown in FIG. 2, required partition ribs whose tips are brought into contact with each other are integrally provided on the inner surfaces of the two main body cases 21, and the main body case 21 is provided by these ribs. Inside is a dust collection chamber 23 at the front,
The exhaust chamber 24 in the middle part, the reel accommodating part 25 in the rear part, the dust collecting chamber 23, and the main body case 21 extending under the exhaust chamber 24
It is partitioned into a lower reflux chamber 26. The upper surface of the dust collection chamber 23 located on the front side of the exhaust chamber 24 is opened, and the opening is hermetically closed by a case lid 27 that is detachably attached to the front upper portion 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 vicinity of the upper end of the filter mounting portion 28 is manually pressed against the force of the spring 29 to the arrow in FIG. A filter retainer 30 that is pivotally operated in the direction about a pivot 30a is attached. The dust bag 31 made of a paper pack as a filter that can be put in and taken out of the dust chamber 23 is housed in the dust chamber 23 by attaching a flat mouth frame 31a to the filter attaching portion 28 with the filter retainer 30. Has been done. A filter support 32 having a large number of elongated ventilation holes is provided at the rear of the dust collection chamber 23.
The filter support 32 supports the rear surface of the dust collecting bag 31 that has expanded due to the cleaning operation.

An electric blower 35 is installed in the exhaust chamber 24 with its suction port facing the dust collecting chamber 23 side. 36, 3
Reference numeral 7 is 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 collecting chamber 23 is provided with an opening 38a facing the suction port, so that the dust collecting bag 31 in the dust collecting chamber 23 is passed. Air is an electric blower 35
Is sucked into.

The electric blower 35 includes an electric blower and a motor cover 39, which will be described later, 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 attached 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 attached to the bracket 35b, respectively.
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 unillustrated carbon brushes elastically pressed against the commutator 35h of the rotor 35f. And a brush device.

Therefore, in this electric blower, the diffuser 35c and the centrifugal fan 35g are connected to the fan cover 35d.
The motor part, which is made up 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 support rubber 36 is fitted on the outer peripheral surface of the fan cover 35d. A portion of the bearing bracket 35e other than the bearing mounting portion 35i has, for example, a four-column structure, and the brush device is attached to two of these column portions.

During operation of the electric blower 35, the air in the dust collecting chamber 23, which is sucked into the centrifugal fan 35g through its suction port, is discharged from around the fan 35g and then guided by the inner surface of the fan cover 35d. Diffuser 3
It flows into the inside of 5c from the inlet of its outer peripheral portion, and then flows out toward the periphery of the stator 35a of the motor portion while being statically pressured 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 is attached by fitting its opening edge portion to the outer peripheral portion of the fan cover 35d. The end of the motor support rubber 36 on the diffuser 35c side is sandwiched between the covers 35d and 39 to hermetically seal between them. On the peripheral wall of the motor cover 39, for example, a thermostat (not shown) for preventing overheating is attached as a temperature sensor for thermally protecting the cleaner body 12 against exhaust gas emitted from the electric blower 35. At the same time, a plurality of exhaust passage holes 41 (only one is shown) communicating the inside of the motor cover 39 with the exhaust chamber 24 are opened.

A bearing mounting portion 35i of the bracket 35e is passed through a hole formed in the central portion of the bottom wall of the motor cover 39, and the motor supporting rubber 37 is attached to the outer surface of the mounting portion 35i.
Are fitted. The electric blower 35 provided with the motor cover 39 has motor support rubbers 36 at the front and rear ends thereof.
In the state in which 37 are fitted, they are installed by being inserted between the partition ribs 38 and the partition ribs 45 that form the boundary between the exhaust chamber 24 and the reel accommodating portion 25. Note that such support is provided for each of the pair of main body cases 21 as the cleaner main body 12 is assembled.

As shown in FIG. 2, the reel accommodating portion 25 accommodates a cord reel 51 for supplying electric power to the electric blower 35. A plurality of exhaust ports 52 are provided on the rear wall of the cleaner body 12. Of these exhaust ports 52, the portion that is on the rear wall 21a of the cleaner body 12 is the rear wall 21a.
When the cleaner body 12 is placed upright on the floor surface and is used as a leg, the leg protrusion 53 is provided on the outer surface of the rear wall 21a. The exhaust port 52 and the exhaust chamber 24 are communicated with each other through a tunnel-shaped exhaust path (not shown) formed along the outer surface of the cord reel 51.

As shown in FIG. 2, a rectangular cylindrical air outlet 55, which has a much larger opening area and is shorter than the exhaust passage hole 41, is integrally provided on the peripheral portion of the motor cover 39 so as to project downward. A rubber packing 56 is fitted in the outlet 55. The air outlet 55 is airtightly connected to a hole 58 provided in a partition rib 57 that partitions the reflux chamber 26. Therefore, the inside of the motor cover 39 and the rear end of the cleaner body 12 in the return chamber 26 are communicated with each other via the air outlet 55.

Reference numeral 59 in FIGS. 1 and 2 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, and the outside air is collected in the dust collecting chamber 2.
3 is a leak valve to be introduced into the inside.

Next, the suction port body 13 will be described with reference to FIGS. The suction port body 13 includes a connection pipe 101 as a connection portion that communicates with the cleaner body 12 side,
It is provided with a suction port main body 102, a reflux outlet 103, and 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.

The connecting pipe 101 which is removably inserted into the connecting port 22 and communicates with the cleaner body 12 is shown in FIGS.
As shown in FIG. 9, an inner connecting pipe 105 having both ends opened, an outer connecting pipe 106 integrally and coaxially provided on the tip end side of the connecting pipe 105, and the outer connecting pipe 1
It has a pair of pivot portions 109 as outlets of the blow-out air passage, which are integrally projected from 06.

The cylindrical inner connecting pipe 105, which is longer than the outer connecting pipe 106, is inserted into the small diameter portion of the connecting port 22 and has a rubber seal valve (not shown) included in the mouth frame 31a.
Alternatively, a rubber seal valve (not shown) fitted to the end of the connection port 22 on the dust collecting chamber 23 side is pushed open to guide air containing dust into the dust collecting bag 31. A pair of upper and lower stopper projecting edges 105a, 1a are provided at the opening edge of the tip portion of the inner connecting pipe 105 protruding outside the main body case 21.
05b is projected outward. Outer connecting tube 106
Is to be inserted into the large diameter portion of the connection port 22. The pair of pivot portions 109 are arranged in opposite directions so as to face each other and have a cylindrical shape that is provided substantially at a right angle to the axial direction of the outer connecting pipe 106 or obliquely projecting, and any tip thereof is provided. It is open.

Both the inner and outer connecting pipes 105 and 106 and the pivot portion 10
A return air duct 107 is formed over 9 and this air duct 1
The inlet 107a of 07 is located on the opposite side to the pivot portion 109 of both the inner and outer connecting pipes 105 and 106, and the return air passage 10
The outlet of 7 is formed by a pair of pivots 109. The inlet 105c of the inner connecting pipe 105 is provided between the pivots 109, and the inlet 105c
The pair of left and right inlet end walls 108, which form the boundary between the pair of pivot portions 109 and the pair of pivot portions 109, have a distance between the facing surfaces of the inner connecting pipe 10
5 is formed in a slanted shape so as to widen toward the upstream side (indicated by a two-dot chain line arrow in FIGS. 6 and 9) in the air suction direction. A flange 110 continuous in the circumferential direction is integrally projectingly provided on the outer peripheral surface of both pivot portions 109. Outer connecting tube 10
An airtight seal member 111 such as an O-ring made of synthetic rubber is attached to the outer peripheral surface of the end of 6 on the side opposite to the pivot portion 109. 8 and 9, reference numeral 112 is a claw integrally projecting from the outer connecting pipe 106.

As shown in FIG. 2, the connecting pipe 101 is inserted until the outer connecting pipe 106 comes into contact with the wall surface of the connecting port 22 in which the vent hole 22a is formed, and by this insertion, the outer connecting pipe 106 is connected to the connecting port 22. Is fitted to the inner peripheral surface of the, the airtightness between the inner peripheral surface and the inner peripheral surface is secured by the airtight sealing material 111, and in this state, it is rotated in the circumferential direction
The claw 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 suction port body 13 from coming off the connection port 22 and the return chamber 26 and the return air passage 107 are communicated with each other through the ventilation hole 22a.

As shown in FIG. 3 and FIG. 4, the main body 102 of the suction inlet body has a main body upper case 121 and a main body lower case 122.
Are fitted to each other and connected by screws 120. On the inner surface of the rear part of both the main part upper and lower cases 121 and 122, a pair of bearing plates 123 and 124, each of which is composed of a rib having a semi-circular recess, are integrally projectingly provided. The parts 109 are sandwiched from above and below and supported rotatably. With this support structure, the connection pipe 101 is pivotally attached to the rear portion of the suction port body main portion 102 so as to be vertically erected, and the rotation of the suction port body main portion 102 causes the surface to be cleaned to the surface to be cleaned. The main body 102 of the mouthpiece can be obtained in a proper posture. The vertical rotation of the suction port body main portion 102 with respect to the connection pipe 101 is restricted by the stopper projecting edges 105a and 105b, and the flange 110 is rotated during this rotation.
The mating surfaces of the bearing plates 123 and 124 are in sliding contact with each other. 8 and 9, P indicates the center of rotation between the connecting pipe 101 and the suction port body main portion 102.

As shown in FIG. 8, the suction mouth body main portion 10
The inside of 2 is divided into a recovery chamber 127 that communicates with the inner connecting pipe 105 by partitions 125 and 126 that are continuous with each other, and a blowout chamber 128 that surrounds the recovery chamber 127 excluding its lower surface opening. Partition 12 as shown in FIG.
Reference numeral 5 denotes a rib integrally projecting across the pair of left and right bearing plates 123 at the center of the inner surface of the main part upper case 121 in the width direction, and faces the inlet 105c of the inner connecting pipe 105. The recovery chamber 127 is in communication with the intake port 129, and the blowout chamber 128 is in communication with a pair of pivot portions 109 that form the outlet of the return air passage 107. The intake port 129 is provided so as to open in the bottom wall 122a facing the surface to be cleaned of the lower case 122 of the main part.

The partition 126 is for the upper and lower cases 12 of the main part.
It is made of a synthetic resin plate molded separately from the first and the second 122, and is arranged over substantially the entire width direction of the front part of the main body 102 of the suction port body. The upward rear edge portion formed in the central portion of the partition 126 is concavely and convexly fitted to the lower edge of the partition 125, and the downward rear edge portions on both sides of the upward rear edge portion are formed on the main portion lower case 121. The partition edge is fitted in an uneven shape from above. In addition, 121a in FIG. 4 is the partition 1
This is a boss integrally provided on the inner surface of the main part upper case 121 for pressing and fixing 26 from above.

The reflux outlet 103 is located on one side (front side in this embodiment) of the recovery chamber 127, and the suction inlet main portion 10 is provided.
The air which is formed to extend in the width direction of 2 and which flows back from the outlet 103 into the outlet chamber 128 and flows by using the partition 126 and the upper main case 121 as a guide.
It is blown out toward the 27 side. In addition, in FIG. 3, FIG. 7, and FIG. 8, reference numeral 131 denotes a bottom wall 122a as a spacer means.
Are downwardly-directed first brush bristles, which are spaced apart from each other except the front edge portion 122b thereof, and which are flexible and have a space between the surface to be cleaned and the air inlet 129. It is designed to form a predetermined narrow suction gap.

Intake port 129 as shown in FIGS.
On the inner surface of the front edge portion 122b adjacent to the front side of the air outlet, air flowing into the recirculation outlet 103 is blown out.
Pair of first wind guides 135 divided at the central portion in the longitudinal direction of the
And one or more second wind guides 1 located on either side of these
36 are provided.

More specifically, the pair of first wind guides 135 are formed by ribs integrally projecting on the inner surface of the central portion of the front edge portion 122b in the longitudinal direction with a predetermined distance therebetween, and these ribs are mutually spaced. It is provided obliquely so that it gradually narrows toward the outlet 103. The height of these first wind guides 135 is as shown in FIG.
It is lower than the height of 22b. Further, the tip end portions (end portions on the side of the return air outlet 103) of the pair of first wind guides 135 are integrally connected to each other by a wind shield rib 137. Wind shield rib 13
7 has a wind-shielding structure for the reflux outlet 103 between the front end portions of the pair of first wind guides 135. Instead of the rib 137, the space between the pair of first wind guides 135 is piled up. It may be filled (in this case, the slopes at the left and right ends of the padded portion are the first wind guides 135). Further, the left and right second wind guides 136, which are not necessarily required, are formed by a plurality of oblique ribs parallel to the first wind guide 135, and the height thereof is the first wind guide 13.
Same as 5. The guides 135, 136,
The height of the wind shield rib 137 is the same as that of the circulation outlet 103.
It may be the same as the height of
The portion deviating from 3 can be made higher.

At the bottom of the main body 102 of the suction inlet, the magnitude of the dust suction force generated at the suction inlet 129 is controlled by changing the blowing direction of the air blown out from the recirculation outlet 103. A body 104 is attached.

That is, as shown in FIGS. 3 and 7, the wind direction control body 104 includes the wind direction control plate portion 1 by the front frame portion of the control body main body 141 molded in a frame shape with synthetic resin.
42 is formed, and second brush bristles 143 as a detection portion for detecting the surface to be cleaned are formed on the rear frame portion so as to project downward. The second brush bristles 143 located behind the intake port 129 and the rotation center P and provided corresponding to the central portion in the longitudinal direction of the reflux outlet 103 are:
Although not limited to this, the suction port body main portion 102 extends in the width direction and is densely continuous, and has a protruding length downward below the first brush bristles 132 and is soft. A pivot 144 is integrally projectingly provided on both side frame portions of the control body 141.

The second brush bristles 132 are attached right below the inlet end side of the connecting pipe 101, and the suction port main body 1 is provided.
The length of 02 in the width direction is longer than the maximum opening width of the inlet end in the left-right direction. Particularly, in the present embodiment, the length is set to be slightly longer than the dimension between the tips of the pair of pivot portions 109, so that the second brush bristles 132 tend to blow through to the rear of the suction port main body portion 102. Crossing the expected path of air. When the second brush bristles 132 arranged as described above are not provided, since the suction port body 13 has the pair of pivot portions 109 that form the outlet of the return air passage 107, the air from the intake port 129 can be prevented. The blowout is concentrated in the central portion in the width direction of the main body of the suction inlet body 102, and is blown out immediately below the inlet 105a in the suction gap.

As shown in FIGS. 3 to 7, the wind direction control plate portion 142 has a slope portion for changing the wind direction, which is inclined at a relatively steep angle at the front end portion and is inclined rearward as it goes downward. At the same time, it has a wind guide portion that projects rearward from the lower inclined end of the slope portion. In particular, the central portion in the longitudinal direction of the baffle guide portion, that is, the portion of the inner connecting pipe 105 facing the inlet 105c facing the intake port 129 is projected toward the inlet end, and the rear end thereof is arcuate. And warps upward. By providing such an air guide section, the air blown out from the recirculation outlet 103 can be smoothly introduced into the inlet 10
It is excellent in that it can guide toward 5c and can reduce wind loss due to vortices.

On the other hand, the bottom wall 122a of the lower case 122 of the main part
On the outer surface of the main body lower case 122, as shown in FIG.
At both ends in the width direction of the recess 1 communicating with the intake port 129
51 is formed. This recess 151 is the control body 1
A pair of pivot bearing portions 153 each having a bearing hole 152 are formed in the bottom wall 122a facing the recess 151, respectively. Then, the wind direction control body 104 is rotatably attached with the pair of pivots 144 fitted in the bearing holes 152 of the pivot bearing portion 153 so that the pivots 144 serve as fulcrums.

The wind direction control body 104 is the main section lower case 122.
The second brush bristles 143 are always projected from the outer surface of the bottom wall 122a in the state of being attached to the bottom wall 122a. A pair of left and right springs 154 as biasing members are sandwiched between the rear frame portion of the wind direction control body 104 and the bottom wall 122a, and the downward biasing force of these springs 154 causes the second brush bristles to move. 143
Is not in contact with the surface to be cleaned, the wind direction control body 104
Is inclined and held in the second control position shown in FIG.

In FIG. 3, FIG. 7, and FIG. 8, reference numeral 155 denotes a flexible third brush bristle approaching the rear side of the second brush bristle 143 and embedded in 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. By providing the brush bristles 155, when the suction port body 13 is brought into contact with the surface to be cleaned, the pressing load of the suction port body 13 on the surface to be cleaned is received together with the first brush bristles 131, and the second brush bristles 143 are provided.
It is excellent in that it can prevent excessive deformation. Reference numeral 156 shown in FIGS. 3 and 7 and the like is a velvet-shaped flat cleaning body that is raised obliquely toward the front side, and is located directly 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 removes the dust that has already captured when retracting the suction port body 13.

Next, the operation of the air circulation type vacuum cleaner 11 provided with the suction port body 13 having the above construction will be described. As shown in FIG. 2, the electric vacuum cleaner 11 holds the handle 12a while the connection pipe 101 of the suction port body 13 is inserted and connected to the connection port 22 of the vacuum cleaner body 12, and the electric vacuum cleaner 11 is held.
It is used by operating the blower 35 by supplying electric power to the electric blower 35 through the power cord rewound from the cord reel 51 while holding the whole.

During this use, the dust contained in the suction air (indicated by the dotted arrow in FIGS. 2 and 8) flowing into the dust collecting bag 31 through the inner connecting pipe 105 of the suction port body 13 is collected. The air captured by the bag 31 and passing through the dust collecting bag 31 further passes through the filter support 32 and is sucked into the electric blower 35, and then is discharged into the return chamber 26 through the air outlet 55 of the motor cover 39. At the same time, a part thereof is discharged into the exhaust chamber 24 through the exhaust passage hole 41.

The exhaust gas thus flowing into the return chamber 26 is returned from the ventilation hole 22a of the connection port 22 to the return air passage 1 of the connection pipe 101.
07, flows into the outlet chamber 128 of the suction port main body 102 after being divided into left and right by the pair of pivot portions 109 forming the outlet of the air passage 107, and then returns from the outlet chamber 128 to the reflux outlet. Intake port 129 through 103
Side, in other words, the inner connecting pipe 1 in the connecting pipe 101
It is blown out to the recovery chamber 127 side facing the inlet 105c of 05. Then, this blown air is introduced into the inner connecting pipe 105 in which the pivot portion 109 is provided on both sides in the radial direction, and the inlet 105c thereof.
It is sucked from and collected from the vacuum cleaner body 1
It is sucked into the second dust collecting chamber 23. Such an air flow is shown by solid arrows in FIGS. 2 and 8. In this way, the electric blower 3
When the air discharged from the suction port body 13 is collected and circulated by the suction port body 13, the bottom wall 12 of the suction port body 13 is driven by the force.
The dust in the suction gap S between the cleaning surface 2a and the surface to be cleaned is sucked into the suction port 129 together with the outside air, so that the air circulation type cleaning can be performed.

During such cleaning, a part of the air in the motor cover 39 is exhausted through the exhaust passage 41 as described above.
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 body 12 through an exhaust passage (not shown) and an exhaust port 52 formed in the rear wall 21a of the cleaner body 12.

In the air circulation type cleaning, when the suction port main body 102 is moved along the surface to be cleaned, regardless of the direction of the operating force applied to the connection pipe 101, the connection pipe 101 and the suction port main body are moved. The part 102 and the part 102 can rotate at their connecting portions. This rotation sucks in the pair of pivot portions 109 of the connection pipe 101, and the pair of upper and lower bearing plates 12 of the mouth main body portion 102.
By the structure of rotatably sandwiching between 3 and 124, the suction inlet main body 102 having the reflux outlet 103, the inlet 129 and the like, and the connection pipe 101 communicating with the cleaner body 12 side, This can be done by connecting so as to tilt up and down.

By utilizing the pivot portion 109 which connects the connecting pipe 101 and the suction port body main part 102 in such a manner that they can rotate relative to each other, the cleaner main body 12 into the suction port body main part 102 can be used.
According to the configuration in which the air is recirculated from the side, it is not necessary to separately provide the air passage for performing the recirculation and the pivot portion 109, and the structure of the suction port body 13 can be simplified and the pivot portion 109 can be simplified. Bearing plates 123, 12 for supporting
4 can be used as a part of the partition between the recovery chamber 127 and the blow-out chamber 128 inside the main body 102 of the suction port, so that the structure of the suction port 13 can be simplified even in this configuration.

By the rotation of the connecting portion, the main body 1 of the suction port body 1 regardless of the push / pull operation of the suction port body 13.
02 is prevented from tilting forward or backward with respect to the surface to be cleaned, and the posture of the suction port body main portion 102 is properly set along the surface to be cleaned, in other words, the intake port 129 is substantially parallel to the surface to be cleaned. The posture of the main body 102 of the suction mouth can be maintained so as to be maintained at. Therefore, when handling during cleaning, it is not necessary to operate so that the suction inlet main portion 102 does not carelessly incline with respect to the surface to be cleaned, and usability can be improved. As described above, during cleaning, the suction inlet main body 102 is not tilted with respect to the surface to be cleaned, and the suction inlet main body 10
Since the surface of the second member facing the surface to be cleaned is prevented from separating from the surface to be cleaned, the dust absorption performance is not deteriorated and the dust absorption performance can be improved. In addition, as described above, since it is possible to prevent the main body 102 of the suction port from being inclined with respect to the surface to be cleaned, the air circulated while being blown out from the reflux outlet 103 and being collected by the inner connecting pipe 105 is collected. Since the balance is lost and air is less likely to be blown out around the intake port 129, it is possible to prevent the dust around the air from being blown off.

Moreover, since the inlet 105c of the inner connecting pipe 105 for collecting the air blown toward the intake port 129 directly faces the intake port 129, the flow path resistance related to dust absorption is small and the air is blown toward the intake port 129 side. The dust on the surface to be cleaned can be directly sucked into the inner connecting pipe 105 together with the collected air, and the dust absorbing performance can be improved, and at that time, the risk that relatively large dust is caught and clogged can be extremely reduced.

Further, as described above, in the structure of the suction port body 13 in which the pair of pivot portions 109 are provided so as to face each other in opposite directions, and the pivot portions 109 all form the return air passage 107. The air recirculated from the cleaner body 12 side into the suction port main body portion 102 is split into left and right by passing through the pair of pivot portions 109, and the reflux outlets 103 are provided from both sides in the width direction of the suction port body main portion 102. Can be supplied to. Therefore, the pressure distribution of the air that is spread to the recirculation outlet 103 formed extending in the width direction of the main inlet body 102 can be equalized left and right, and accordingly, the inlet 129 can be made uniform.
Since it is possible to suppress a large difference in the velocity of the air blown from one end and the other end in the longitudinal direction of the intake port 12,
It is possible to prevent the dust absorption performance of the both ends of 9 from being greatly varied.

Then, a pair of wind guides 135 are provided in the main body 102 of the suction port adjacent to the upstream side of the return blowout port 103.
Are provided at intervals, the two systems of air diverted in the suction inlet main body 102 by the pair of pivot portions 109 as described above are provided inside the front edge portion 122b of the suction inlet main body 102. While the air is supplied to the recirculation outlet 103 from both sides in the width direction of the suction inlet main body 102 so as to face each other, and this air is blown out from the recirculation outlet 103, turbulence is suppressed at that time. it can.

That is, as described above, the wind guides 135 prevent the airflows of the two systems that flow so as to face each other and are supplied to the recirculation outlet 103 from colliding with each other, while the airflows of the two systems are independent from each other. And return outlet 103
Can be blown out to the inlet 105c side through the intake port 129. Thereby, the generation of turbulent flow that disturbs the direction of the air blown out from the recirculation outlet 103 can be suppressed, and the blowing direction of the air blown from the recirculation outlet 103 to the intake port 129 side can be appropriately controlled. . Therefore, when the suction port body 13 is brought into contact with or separated from the surface to be cleaned, the suction port 12
It is possible to prevent air from being blown out toward the surface to be cleaned through 9 and the light dust on the surface to be cleaned to be blown to the surroundings.

Moreover, since the first wind guide 135 for suppressing the generation of turbulence is provided obliquely as described above, these first wind guides 135 are provided.
The air guide 135 and a plurality of second air guides 136, which are also obliquely arranged, rectify the air that is about to flow into the reflux outlet 103, and as shown by the solid arrow in FIG. The air can be guided toward the center in the width direction of the. Therefore, it is possible to suppress the occurrence of turbulent flow due to the collision of the air flows of the two systems with the wind guides 135 and 136. Furthermore, since the pair of left and right first wind guides 135 are connected by the wind shield ribs 137, the pair of first wind guides 1
Despite the turbulent flow generated by the collision of the two systems of air in the upper part of 35, the air whose blowout direction is not controlled by this turbulent flow passes between the pair of wind guides 135 and flows into the return blowout port 103. It is possible to prevent the air from being blown out from the central portion in the width direction toward the surface to be cleaned. Therefore, by adding these actions, it is possible to more appropriately control the blowing direction of the air blown to the intake port 129 side, and prevent the air from being blown to the surface to be cleaned.

Further, in this embodiment, the inlet 105c of the inner connecting pipe 105 in the suction port body 13 and the pair of pivot portions 1 are provided.
The inlet end wall 108, which forms a boundary with 09, is formed in a slanted shape so that the distance between the facing surfaces of these inlet end walls 108 becomes wider toward the upstream side in the air suction direction with respect to the inner connecting pipe 105. The air entering and exiting the connecting pipe 101 can be smoothly guided by the inlet end wall 108 in the shape of a circle. That is, the oblique inlet end wall 108 allows the air flowing through the return air passage 107 to reach the pivot portion 109 which is the outlet thereof,
It is possible to smoothly guide and gently change the direction in front of the pivot portion 109 without suddenly changing the direction, and to smoothly collect the air sucked and collected from the intake port 129 into the inner connecting pipe 105. It can be collected while guiding. Therefore, the loss of the air circulated through the suction port body 13 can be reduced.

Moreover, in this embodiment, since the suction port body 13 is provided with the wind direction control body 104, the operation of the wind direction control body 104 during cleaning will be described next.

When the suction port body 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 biasing force of the spring 154. In the 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 recovery chamber 127, so that the air blown rearward from the reflux outlet 103 is controlled in the wind direction. The air is blown toward the rear side in a direction other than the surface to be cleaned, for example, substantially parallel to the surface to be cleaned, without hitting the slope portion forming the front end of the plate portion 142. In other words, the inner connection pipe 10 is blown out toward the inlet end side of the connection pipe 101 so as to form an air flow that is substantially parallel to the surface to be cleaned, which does not go downward from the intake port 129.
5 is sucked into.

As described above, the air blown and collected substantially parallel to the surface to be cleaned flows while spreading to some extent, but does not blow out to the outside through the intake port 129. Port 103 to inner connecting pipe 10
The dust suction force generated in the intake port 129 by the force of the air collected in 5 is smaller than that in the case where the wind direction control body 104 is arranged at the first control position described later. Further, the momentum of the air collected as described above is lower than that in the case where the wind direction control body 104 is arranged at the first control position, which will be described later. Therefore, the sound accompanying the blowing of air is small and low. You can drive with noise.

When the suction port body 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 controller 104 comes into contact with the surface to be cleaned and receives a pushing force. Therefore, the wind direction control body 104 is rotated around the pivot 144 against the biasing 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 are flexible, they are densely arranged and long in a strip shape, so that the pushing force of the surface to be cleaned can be transmitted.

The wind direction control body 141 at the first control position
The wind direction control plate portion 142 is arranged near the intake port 129 and the slope portion is opposed to the reflux outlet 103. Therefore, the air blown rearward from the recirculation outlet 103 is the slope portion 142a of the wind direction control plate portion 142.
Since it is blown to and is guided obliquely downward, it blows downward from the intake port 129, is reflected on the surface to be cleaned, and is again returned from the intake port 129 along with the air in the suction gap between the bottom wall 122a and the surface to be cleaned. It is sucked into the recovery chamber 127 and subsequently sucked into the inner connecting pipe 105.

In this case, since the gap between the sloped portion of the wind direction control plate portion 142 and the recirculation outlet 103 is narrowed, the flow velocity of the air blown to the surface to be cleaned through the air inlet 129 is increased. Therefore, it is possible to obtain the action of digging dust from the surface to be cleaned such as a carpet and to blow up even relatively heavy dust on the surface to be cleaned. In other words, the air collected in the inner connecting pipe 105 from the recirculation outlet 103 is strong, so that the intake port 129
The dust suction force generated in (1) is larger than that in the case where the wind direction control body 104 is arranged at the second control position shown in FIG. 8 (A).

In the state where the suction mouth main portion 102 is lightly pressed against the surface to be cleaned, the first and third brush bristles 13 are
1, 155 serve as stoppers to form the suction gap having a length equal to the projecting length of the air circulation type cleaning, but from this stage, the suction mouth body main portion 102 is covered more strongly if necessary. When the brush bristles 131 and 155 are pressed against the cleaning surface, the suction gap S can be narrowed by the flexible deformation of the brush bristles 131 and 155 for cleaning.

Further, the second portion as the surface to be cleaned detecting portion which is continuously extended in the width direction of the main body 102 of the suction inlet body.
The brush bristles 143 can be used as a wind barrier against the air when the air is blown out from the intake port 129 during cleaning. That is, for example, when the main body of the suction port is brought into contact with or separated from the surface to be cleaned, the wind direction control plate portion 14 is temporarily assumed.
In a situation in which air is blown toward the surface to be cleaned through the intake port 129, the second brush bristles 14
Since 3 is in contact with the surface to be cleaned, the brush bristles 143
This makes it possible to block the air that is about to flow backward along the surface to be cleaned. Accordingly, it is possible to prevent the air from passing through the second brush bristles 143 to the rear of the main body 102 of the suction port and the resulting scattering of dust on the surface to be cleaned.

Moreover, the second brush bristles 14 having flexibility
In a situation in which a step or a protrusion on the surface to be cleaned partially contacts with the surface 3, since it can be flexibly deformed so that only that portion escapes the step or the like, a second step to the step or the like protruding on the surface to be cleaned is provided.
Regardless of the contact of the brush bristles 143, the entire brush bristles 143 are not pushed and moved, and the brush bristles 143 have a proper size between the surface to be cleaned and the outer surface of the bottom wall 122a of the suction port main body 102 facing the surface to be cleaned. Until the suction gap S is formed, the blow-out control body 104 can be held at the second control position even if there is a step on the surface to be cleaned, and accordingly a large dust suction force is not generated at the intake port 129. Therefore, even if the balance of the circulating air is lost, a part of the circulating air passes through the intake port 129 and the suction inlet body 102.
It is possible to prevent the dust and the like on the surface to be cleaned from being blown out of the room.

The present invention is not limited to the above embodiment. For example, the connecting portion may be provided so as not to be rotatable with respect to the main body of the suction port body. Further, the blow-out control body may be omitted in the present invention, and the present invention can be applied to a canister type air circulation type vacuum cleaner.

[0074]

The present invention is carried out in the form as described above, and has the following effects.

According to the suction port body of the present invention, the dust sucked into the intake port together with the air blown to the intake port side and collected is directly sucked into the inner connecting pipe. Since it can be put in, it is possible to improve the dust absorption performance and prevent clogging of dust during this dust absorption. Moreover, the air returned to the main portion of the suction inlet body is diverted by the pair of return air passage outlets and is supplied to the recirculation outlet while flowing so as to face each other. Since it is possible to prevent the flows from colliding with each other and suppress the occurrence of a turbulent flow that disturbs the direction of the air blown from the recirculation outlet, it is possible to suppress dust on the surface to be cleaned.

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

[Brief description of drawings]

FIG. 1 is a perspective view showing an entire handy type air circulation type electric vacuum cleaner according to a first embodiment of the present invention with a cleaner body and a suction port body separated from each other.

FIG. 2 is a vertical cross-sectional side view showing the entire electric vacuum cleaner shown in FIG. 1 in a state where a suction port body is connected to a cleaner body.

FIG. 3 is a perspective view showing a suction port body of the electric vacuum cleaner shown in FIG. 1 as viewed from a lower surface side thereof.

FIG. 4 is an exploded perspective view showing the structure of the suction port body shown in FIG.

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

6 is a plan view showing a partial cross-section of the structure of the suction port body shown in FIG. 3 with the upper case of the main part thereof removed.

FIG. 7 is an exploded perspective view showing a lower case of a main portion of the suction port body shown in FIG. 3 and a wind direction control body pivotally attached to the lower case.

FIG. 8A is a vertical cross-sectional side view showing the configuration of the suction port body shown in FIG. 3 in a state of being separated from the surface to be cleaned. (B) is FIG.
FIG. 4 is a vertical cross-sectional side view showing the configuration of the suction port body shown in FIG.

9 (A) is a side view showing the configuration of a connection pipe provided in the suction port body shown in FIG. (B) is WW in FIG. 9 (A)
Sectional drawing shown along a line.

[Explanation of symbols]

11 ... vacuum cleaner, 12 ... Vacuum cleaner body, 13 ... Suction mouth, 31 ... Dust bag (filter), 35 ... Electric blower, 101 ... Connection pipe (connection part), 102 ... the main body of the suction mouth, 103 ... reflux outlet, 105 ... Inner connecting pipe, 105c ... Inlet of inner connecting pipe 106 ... Outer connecting pipe, 107 ... Return air passage, 109 ... Axis part (exit of return air passage), 122a ... bottom wall, 127 ... collection room, 128 ... Blowout room, 129 ... Intake port, 135 ... First wind guide, 136 ... second wind guide, 137 ... Wind-shield ribs (wind-shield structure).

Claims (4)

(57) [Claims] 1. An air blower built into a cleaner body passes air through a filter to capture dust, and the air discharged from the electric blower through the filter is collected and circulated for cleaning. In a suction port body provided in an electric vacuum cleaner that operates, a suction port body main portion having an intake port for sucking air on an outer surface facing a surface to be cleaned, and the suction port located on one side of the suction port. A recirculation outlet that extends in the width direction of the main body portion and circulates air that is circulated to the intake port side, and the intake port main body that is located on the opposite side of the recirculation outlet port with the intake port as a boundary. And a connecting portion provided on the cleaner body side, the connecting portion being inside the outer connecting pipe having a pair of return air passage outlets projecting in opposite directions so as to face back. Has an inlet facing the intake And a return air passage communicating with the inside of the main body of the suction port body is formed between the both connection pipes for suction, and A suction port body, characterized in that a wind guide for dividing air flowing into the mouth at the longitudinal center of the recirculation outlet is provided adjacent to the upstream side of the recirculation outlet. 2. The suction port body according to claim 1, wherein the wind guide is obliquely provided so as to guide the air toward the center of the main portion of the suction port body in the width direction. 3. The wind-shielding structure for the reflux outlet is provided between a pair of left and right wind guides located at a central portion in the width direction of the main portion of the suction port body. Suction mouth. 4. An electric blower in the main body of the vacuum cleaner operates to suck in air on the surface to be cleaned from the inlet of the inlet, and the sucked air is passed through a filter to capture dust and pass through the filter. In the electric vacuum cleaner, the air discharged from the electric blower is returned to the intake port, and the returned air is collected and circulated to clean the suction port body. Either one
An electric vacuum cleaner having the suction mouth according to the item.