JP2000107100A - Suction port body and vacuum cleaner - Google Patents

Abstract

(57) [Summary] An object of the present invention is to provide a suction port body that can improve dust absorption performance and usability, and that can suppress dust clogging and dust blowing on a floor surface during dust collection. A main part of an inlet body, a return outlet provided in the main part, and a connecting part connected to the main part so as to be turned upside down are provided. Main part 1
Numeral 02 has bearing plates 123 and 124 and an intake port 129 for sucking air. The recirculation outlet blows out circulated air toward the inlet. The connecting portion 101 is provided with an inlet inner connecting pipe 105 having an inlet 105c facing the intake port, an outer connecting pipe 106 provided with the pipe inside, and a projecting part integrally formed from the pipe to be rotatable on the bearing plate. And a pair of pivots 109 supported. The return air passage 107 is formed between the two connection pipes 105 and 106 with the two pivots 109 as outlets. Dust is absorbed by the central inner connection pipe 105, and air circulating from the cleaner body side through the pivots 109 on both sides of the main connection pipe 105.
It is characterized in that it is blown back by returning it to the inside of 02.

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 air circulation type vacuum cleaner proposed so far, there is no example in which a suction port body is provided with a connection portion rotatably connected to each other and a suction port main body portion. As exemplified in JP-A-24643, a conventional suction opening body cannot rotate. By the way,
The suction port shown in FIG. 1 of the above publication is non-rotatable, and the air returned from the cleaner body side is directed toward the surface to be cleaned to a main portion of the suction port body having an entire lower surface as a suction port. It has a configuration in which a recirculation outlet to be blown out and an intake pipe for sucking and recovering the air blown out from the outlet through the intake port.

[0004]

However, in the suction port for an air circulation type vacuum cleaner exemplified in the above-mentioned publication, when the suction port is pushed and pulled along a floor (a surface to be cleaned), the operation thereof is performed. Since the lower surface of the main body of the inlet body is inclined forward or backward with respect to the floor surface by force and easily separates from the floor surface, it is necessary to operate with care so that the dust absorption performance is easily reduced and the inclination does not occur. Therefore, there is a problem that the usability is not good. Not only that, with the inclination, the balance of the air circulated while being blown out from the return outlet and being collected in the intake pipe is disrupted, and the air is blown out around the intake, which may blow off light dust around the intake. There is also the problem of being expensive. Moreover, in the structure in which the return outlet is disposed in the recovery chamber in which the lower surface is the intake port and the intake pipe is connected to the upper portion as in the inlet port body described in FIG. Since the pipe member has a resistance to the flow path of the air from the intake port to the intake pipe, the dust absorbing performance is not good, and relatively large dust among the sucked dust is easily caught by the pipe member and clogged. is there.

[0005] The first problem to be solved by the present invention is as follows.
An object of the present invention is to provide a suction port having a simple structure capable of improving dust absorbing performance and usability and suppressing dust clogging at the time of dust collection and blowing off dust on a surface to be cleaned.

A second problem to be solved by the present invention is that
In order to solve the first problem, an object of the present invention is to provide a suction port body capable of equalizing the blowing of air from a recirculation blowing port.

A third problem to be solved by the present invention is that
In order to solve the second problem, an object of the present invention is to provide a suction port body capable of reducing the loss of circulating air.

[0008] A fourth problem to be solved by the present invention is as follows.
An object of the present invention is to provide an air circulation type vacuum cleaner that can solve any one of the first to third problems.

[0009]

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

In order to solve the first problem, a suction port according to the present invention has a suction port for suctioning air on an outer surface facing a surface to be cleaned, and a bearing portion having an inner portion. The main body of the suction port provided in the main body, the recirculation outlet provided in the main part to blow out the circulated air to the side of the intake port, and a pair of pivot portions rotatably supported by the bearing portion. A connection portion connected to the suction opening body main portion so as to be upside down and communicated with the cleaner body side, and the connection portion has an entrance facing the intake port. A suction inner connection pipe provided inside the outer connection pipe on which the pair of pivots are protruded, and the suction port body extending between at least one of the pair of pivots and the connection pipes. Having a return air passage communicating with the inside of the main part It is an butterfly.

In the present invention, the air circulated from the main body of the suction opening body from the cleaner body side is firstly formed between the inner and outer connecting pipes of the connecting part and at least one of a pair of pivots connected to the connecting pipe. After passing through the return air passage, and returned from at least one of the pivots forming the outlet of the passage into the main body of the suction port body, from the reflux outlet provided in the main body of the suction port body to the suction port side. It is blown out. Then, the blown air is sucked into the inner connecting pipe of the connecting portion through the inlet, and is sucked and collected by the cleaner body. Therefore, with the air circulation passing through the suction port body through the above route, the air in the suction gap between the surface to be cleaned and the external surface opposite to the surface to be cleaned of the main portion of the suction port body,
The air is circulated through the intake port facing this gap, and the air circulation cleaning can be performed.

According to the suction port body of the present invention, the main body of the suction port body having a recirculation outlet and a suction port and the connecting portion communicating with the cleaner main body side are formed by connecting the pair of pivots of the connecting portion. It is rotatably supported by the bearing part of the suction port main part,
They are connected so as to be turned up and down.

Therefore, when the main body of the suction port body is moved along the surface to be cleaned in the air circulation type cleaning,
Regardless of the direction of the operating force applied to the connecting portion, the rotation of the connecting portion and the main portion of the suction port body at the connecting portion can prevent the main portion of the suction port body from tilting forward or backward with respect to the surface to be cleaned. . Thereby, the posture of the main body of the suction port body can be held so as to properly follow the surface to be cleaned, and it is not necessary to operate the main body of the suction port body with care so as not to tilt during handling during cleaning. . Moreover, since the inlet of the inner connecting pipe for collecting the air blown out to the inlet side faces the inlet, the dust sucked into the inlet together with the collected air is directly sucked into the inner connecting pipe. And at the same time, the possibility that relatively large dust is caught and clogged can be extremely reduced.

Further, as described above, the return of the air from the main body of the cleaner to the main portion of the suction port body is performed by using the pivot portion which connects the connecting portion and the main portion of the suction port body relatively rotatably. The structure is simple.

According to a second aspect of the present invention, there is provided a suction port body according to the first aspect of the present invention, wherein the return outlet extends in a width direction of the main portion of the suction port body. And the pair of pivots are provided in opposite directions so as to face backward, and both of the pair of pivots form the return air passage.

In the present invention, since both the pair of pivots are used as outlets of the return air passage, the air circulated from the main body of the cleaner into the main part of the suction port body is directed in the width direction of the main part of the suction port body. It is possible to supply the recirculation outlet formed so as to extend not only from one side in the width direction of the main body of the inlet body but also from both sides.

According to a third aspect of the present invention, there is provided a suction port body according to the third aspect of the present invention, which forms a boundary between the inlet and the pair of pivots. The inlet end wall of the inner connection pipe is formed so as to be inclined so that the distance between the opposing surfaces of the inlet end walls increases toward the upstream side in the air suction direction with respect to the inner connection pipe. .

According to the present invention, the air flowing through the return air passage so as to reach the outlet is suddenly changed in front of the outlet at the inlet end wall of the oblique inner connection pipe. It is possible to smoothly change the direction by guiding the air without being guided, and to collect the air collected from the intake port into the inner connecting pipe so as to be smoothly converged by the inclined inlet end wall.

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 body 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 fourth 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, the 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 the invention of any one of the inventions of the claims 1 to 3 is provided. The effect can be obtained as already described.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below 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 whose tips are brought into contact with each other as they are connected. Inside is a dust collection chamber 23 at the front,
An exhaust chamber 24 in the middle, a reel housing 25 in the rear, a main body case 21 extending below the dust collecting chamber 23 and 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 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 vicinity of the upper end of the filter mounting portion 28 is manually opposed to 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 side. 36, 3
Reference numeral 7 denotes a vibration-proof motor supporting rubber fitted to both front and rear ends of the electric blower 35. The partition rib 38 located at the boundary between the exhaust chamber 24 and the dust collection chamber 23 has an opening 38a facing the suction port, thereby passing through the dust collection bag 31 in the dust collection chamber 23. Air blower 35
Sucked into.

The electric blower 35 includes an electric blower and a motor cover 39 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 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.

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

As shown in FIG. 2, the motor cover 39 of the electric blower 35 is formed of a synthetic resin in the shape of a cup, 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 penetrates a hole provided at the center of the bottom wall of the motor cover 39, and the motor support rubber 37 is formed on an outer surface of the mounting portion 35i.
Are fitted. The electric blower 35 having the motor cover 39 has a motor support rubber 36 at both front and rear ends thereof.
In a state in which the partition ribs 37 are fitted, the partition ribs 38 are inserted between the partition ribs 45 and the partition ribs 38 that define the boundary between the exhaust chamber 24 and the reel housing portion 25. Note that such support is provided for each of the pair of main body cases 21 as the vacuum cleaner main body 12 is assembled.

As shown in FIG. 2, a cord reel 51 for supplying power to the electric blower 35 is accommodated in the reel accommodating section 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.

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

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

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

The connecting pipe 101 which is detachably inserted into the connecting port 22 and communicates with the cleaner body 12 is shown in FIGS.
As shown in FIG. 9, an inner connection pipe 105 having both ends opened, an outer connection pipe 106 provided integrally and coaxially on the distal end side of the connection pipe 105, and an outer connection pipe 1
06 and a pair of pivots 109 integrally protruded from the actuator.

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

The inner and outer connecting pipes 105 and 106 and the pivot 10
9, a return air path 107 is formed.
07 is located on the opposite side of the pivot 109 between 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
A pair of left and right inlet end walls 108 that form a boundary between the inner connecting pipe 10 and the pair of pivots 109 have a distance between these opposing surfaces.
5 is formed so as to be widened toward the upstream side in the air suction direction (indicated by a two-dot chain line arrow in FIGS. 6 and 9). A flange 110 that is continuous in the circumferential direction is integrally provided on the outer peripheral surface of the pivots 109. Outer connecting pipe 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 opposite to the pivot portion 109 of No. 6. In FIGS. 8 and 9, reference numeral 112 denotes a claw integrally projecting 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 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 suction port body 13 from coming off the connection port 22, and the recirculation chamber 26 and the return air passage 107 communicate with each other through the ventilation hole 22 a.

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 a rib having a semicircular recess are integrally formed on the rear inner surfaces of the upper and lower cases 121 and 122, respectively. The portions 109 are rotatably supported by being sandwiched from above and below, respectively. With this support structure, the connection pipe 101 is pivotally attached to the rear part of the suction port body main part 102 so as to be turned up and down in the vertical direction. Thus, the suction port main body 102 can be obtained in a proper posture. The vertical rotation of the suction port main body 102 with respect to the connection pipe 101 is regulated by the stopper protruding edges 105a and 105b.
The mating surfaces of the bearing plates 123 and 124 are in sliding contact with each other. P in FIG. 8 and FIG. 9 indicates the center of rotation of the connection pipe 101 and the suction port main body 102.

As shown in FIG. 8, the suction port main body 10
The interior of 2 is partitioned into a collection chamber 127 communicating with the inner connecting pipe 105 by partitions 125 and 126 that are continuous with each other, and a blowout chamber 128 surrounding the collection chamber 127 except for an opening on the lower surface thereof. As shown in FIG.
Reference numeral 5 denotes a rib 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 part upper case 121, and faces the inlet 105 c of the inner connection pipe 105. The collection chamber 127 is communicated with an air inlet 129, and the outlet chamber 128 is communicated with a pair of pivots 109 forming an outlet of the return air passage 107. The air inlet 129 is provided in the bottom wall 122 a of the main lower case 122 facing the surface to be cleaned.

The partition 126 is a main part upper and lower case 12
The suction port body 102 is made of a synthetic resin plate formed separately from the main body 1 and 122, and is arranged over substantially the entire width of the front portion of the suction port main body 102. The upward rear edge formed at the center of the partition 126 is fitted into the lower edge of the partition 125 asperities, and the downward rear edges on both sides of the upward rear edge are formed in the main lower case 121. Asperities are fitted to the partition edges from above. In addition, in FIG.
These bosses are formed integrally with the inner surface of the upper case 121 so as to press and fix the plate 26 from above.

The reflux outlet 103 is located at one side (the front side in this embodiment) of the recovery chamber 127 and is located at the inlet main body 10.
2 is formed to extend in the width direction, and from the outlet 103, air that is returned into the outlet chamber 128 and flows using the partition 126 and the main part upper case 121 as guides is collected.
It is blown out toward the 27 side. 3, 7, and 8, reference numeral 131 denotes a bottom wall 122a as a spacer means.
Are the first downwardly-facing brush bristles which are implanted at intervals around the periphery except for the front edge portion 122b thereof, which are flexible and between the surface to be cleaned and the suction port 129. A predetermined narrow suction gap is formed.

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

That is, as shown in FIGS. 3 and 7, the wind direction control body 104 is formed by a front frame portion of the control body body 141 formed of a synthetic resin into a frame shape.
42, and a second brush hair 143 as a detection unit for detecting the surface to be cleaned is protruded downward from the rear frame. The second brush bristles 143 that are located behind the intake port 129 and the center of rotation P and that are provided corresponding to the longitudinal center of the recirculation outlet 103,
Although not limited thereto, the suction opening main body 102 extends in the width direction and is densely continuous, and has a longer protruding length downward than the first brush bristles 132 and is soft. Pivot shafts 144 are integrally formed on both side frames of the control body 141, respectively.

The second brush bristles 132 are attached directly below the inlet end of the connecting pipe 101, and the main body 1 of the suction port body
The length extending in the width direction of 02 is longer than the maximum opening width in the left-right direction of the entrance end. In particular, in the present embodiment, the length is slightly longer than the dimension between the tips of the pair of pivots 109, so that the second brush bristles 132 try to blow through to the rear of the suction port main body 102. Crossing the expected path of air. In the case where the second brush bristles 132 having the above arrangement are not provided, since the suction port body 13 has the pair of pivot portions 109 forming the exit of the return path 107, the air from the suction port 129 is discharged. The blowout is concentrated at the center in the width direction of the main body 102 of the suction opening body, and blows out directly below the inlet 105a in the suction gap.

As shown in FIG. 3 to FIG. 7, the wind direction control plate portion 142 has a relatively steep wind direction changing slope portion which is inclined obliquely backward toward the lower side at the front end thereof. And a wind guide portion protruding rearward from the lower end of the slope. In particular, a central portion in the longitudinal direction of the air guide portion, that is, a portion facing the inlet 105c facing the air inlet 129 of the inner connecting pipe 105 is protruded toward the inlet end, and the rear end is arc-shaped. It is curving upward. Providing such a wind guide portion allows the air blown out from the return outlet 103 to smoothly flow through the inlet 10.
It is excellent in that it can be guided toward 5c and that windage loss due to eddies can be reduced.

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

The main body 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, 7, and 8, reference numeral 155 denotes a third brush bristle having flexibility, which is close to the rear side of the second brush bristles 143 and is implanted on the outer surface of the bottom wall 122a. The brush bristles 155 are provided with the same protruding height and strength as the first brush bristles 131. The provision of the brush bristles 155 is such that when the suction opening 13 is brought into contact with the surface to be cleaned, the pressing force of the suction opening 13 against the surface to be cleaned is received together with the first brush bristles 131, and the second brush bristles 143 are received.
It is excellent in that excessive deformation of can be prevented. Reference numeral 156 shown in FIGS. 3 and 7 and the like denotes a velvet-shaped flat cleaning body brushed obliquely toward the front side, and is located just behind the intake port 129 and attached to the outer surface of the bottom wall 122a.
The cleaning body 156 captures dust when the suction port body 13 moves forward, and releases the already captured dust when retracting.

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

In this use, dust contained in the suction air (indicated by the dotted arrow in FIGS. 2 and 8) flowing into the dust bag 31 through the inner connection 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 passes through the vent hole 22 a of the connection port 22 and returns to the return air passage 1 of the connection pipe 101.
07, flows out of each of the pair of pivots 109 forming the outlet of the air passage 107 into the outlet chamber 128 of the inlet body main part 102, and then flows from the outlet chamber 128 through the return outlet 103 through the inlet port. 129 side, in other words,
Inlet 105c of inner connection pipe 105 in connection pipe 101
Is blown out to the collection chamber 127 side facing. Then, the blown air is sucked from the inlet 105c into the inner connection pipe 105 provided with the pivot portion 109 on both sides in the radial direction and collected, and is sucked into the dust collection chamber 23 of the cleaner body 12 with this collection. . 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. Inlet 12 with air
9, the air circulation type cleaning can be performed.

During the 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).

When the main body 102 of the suction port is moved along the surface to be cleaned in the air circulation type cleaning, regardless of the direction of the operation force applied to the connection pipe 101, the connection pipe 101 and the main body of the suction port are moved. The part 102 can be rotated at a connection portion between the parts. This rotation causes the pair of pivot portions 109 of the connection pipe 101 to be brought into contact with the pair of upper and lower bearing plates 12 of the inlet body main portion 12.
The suction pipe main body 102 having the recirculation outlet 103 and the suction port 129 is connected to the connection pipe 101 communicating with the cleaner body 12 by a configuration that is rotatably sandwiched and supported between 3, 3 and 124. This is possible because they are connected so as to be turned up and down.

As described above, the cleaner body 12 is inserted into the suction port main body 102 by using the pivot 109 that relatively rotatably connects the connection pipe 101 and the suction port main body 102.
According to the configuration in which air is recirculated from the side, there is no need to separately provide an air passage for recirculating air and the pivot 109, so that the structure of the suction port body 13 can be simplified and the pivot 109 can be simplified. Bearing plates 123 and 12 for supporting
4 can be used as a part of the partition between the recovery chamber 127 and the blow-out chamber 128 in the suction port main body 102, so that the structure of the suction port 13 can be simplified in this configuration as well.

The rotation of the connecting portion prevents the main body portion 102 of the suction opening body from tilting forward or backward with respect to the surface to be cleaned irrespective of the push-pull operation of the suction opening body 13, so that the suction operation is performed. The posture of the mouth main body 102 can be appropriately maintained so that the posture of the mouth main body 102 is along the surface to be cleaned, in other words, the posture of the suction main body 102 is maintained such that the intake port 129 is maintained substantially parallel to the surface to be cleaned. Therefore, it is not necessary to carefully operate the suction port main body 102 so as not to incline with respect to the surface to be cleaned during handling during cleaning, and the usability can be improved.

Further, as described above, the cleaning surface of the main body of the suction opening body 102 is not clogged during cleaning, and the surface of the main body of the suction opening body 102 opposed to the cleaning surface is separated from the cleaning surface. Thus, the dust-absorbing performance can be improved while the dust-absorbing performance does not decrease. In addition, since the inlet 105c of the inner connection pipe 105 for collecting the air blown out to the intake port 129 faces directly to the intake port 129, the flow path resistance relating to dust absorption is small, and the air is blown out and collected to the intake port 129 side. The dust on the surface to be cleaned can be directly sucked into the inner connection pipe 105 together with the air to be cleaned, so that the dust-absorbing performance can be improved, and at that time, the possibility that relatively large dust is caught and clogged can be extremely reduced.

In addition, as described above, since the main body 102 of the suction opening body can be prevented from being inclined with respect to the surface to be cleaned, the main body 102 is blown out from the return air outlet 103 and is connected to the inner connecting pipe 1.
Since the balance of the air circulated while being collected at 05 is lost and the air blows out around the intake port 129 is reduced, it is possible to suppress the blowing of light dust around.

Further, as described above, the pair of pivots 109 are provided in the opposite directions so as to face backward, and the configuration of the suction port body 13 in which each of the pivots 109 forms the return air passage 107 is adopted. The air circulated from the cleaner body 12 side into the suction port main part 102 can be supplied to the recirculation outlet 103 from both widthwise sides of the suction port main part 102 through a pair of pivots 109. . Therefore, the pressure distribution of the air that is spread to the return outlet 103 formed extending in the width direction of the inlet main body 102 can be equalized in the left and right directions, and accordingly, one end and the other end in the longitudinal direction of the inlet 129. Since the occurrence of a large difference in the speed of the air blown out of the suction port 129 is suppressed, it is possible to prevent the dust suction performance at both ends in the longitudinal direction of the intake port 129 from greatly varying.

Further, the inner connecting pipe 1 in the suction port body 13
The inlet end wall 108 that forms the boundary between the inlet 105c and the pair of pivots 109 is formed such that the distance between the opposing surfaces of the inlet end walls 108 increases toward the upstream side in the air suction direction with respect to the inner connection pipe 105. Since it is formed obliquely, the air entering and exiting the connection pipe 101 can be smoothly guided by the oblique entrance end wall 108. That is, the slanted inlet end wall 108 connects the return air passage 107 to the pivot 1
The air flowing to reach 09 can be smoothly guided and gently changed in front of the pivot 109 without abrupt change in direction, and is sucked into the inner connecting pipe 105 from the intake port 129 and collected. Air can be recovered while being smoothly guided to converge. Therefore, the loss of the air circulating through the suction port body 13 can be reduced.

In this embodiment, since the suction opening 13 has the wind direction control body 104, the operation of the wind direction control body 104 during cleaning will be described next.

When the suction opening 13 is away from the surface to be cleaned, the biasing force of the spring 154 holds the wind direction control body 104 at the second control position shown in FIG. 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 the wind direction control. The air is blown rearward in a direction other than the surface to be cleaned, for example, substantially in parallel with 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 to the inlet end of the connection pipe 101 so as to form a substantially parallel air flow with the surface to be cleaned that does not go downward from the suction port 129.
It is sucked into 5.

As described above, the air blown out substantially in parallel with the surface to be cleaned and collected recovers and 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.

Further, when the suction opening 13 is pressed against the surface to be cleaned, the second brush bristles 143 as the surface to be cleaned detection portion of the wind direction control body 104 come into contact with the surface to be cleaned and receive a pushing force. Then, the wind direction control body 104 is rotated about the pivot 144 against the urging force of the spring 154, and the control body 141 is 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.

At the first control position, the wind direction controller 141
The wind direction control plate part 142 is disposed so as to be closer to the intake port 129 side and to have a slope portion facing the recirculation outlet 103. Therefore, the air blown rearward from the recirculation outlet 103 is inclined by the slope 142 a of the wind direction control plate 142.
, And is guided obliquely downward, so that the air blows downward from the suction port 129 and is reflected on the surface to be cleaned, and 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. It is sucked into the recovery chamber 127 and subsequently sucked into the inner connection pipe 105.

In this case, the gap between the slope portion of the wind direction control plate portion 142 and the recirculation outlet 103 is narrowed, so that the flow velocity of the air blown to the surface to be cleaned through the 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, and also to blow up relatively heavy dust on the surface to be cleaned. In other words, with the good momentum of the air collected from the recirculation outlet 103 to the inner connecting pipe 105, the
8A is greater than when the wind direction control body 104 is disposed at the second control position shown in FIG.

In the state where 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. In the case where the brush bristles 131 and 155 are pressed against the cleaning surface, the suction gap S can be narrowed with the flexible deformation of the brush bristles 131 and 155, and cleaning can be performed.

Further, a second surface serving as a surface-to-be-cleaned detecting portion extending continuously in the width direction of the main body 102 of the suction opening body is provided.
When air is blown out from the air inlet 129 during cleaning, the brush bristles 143 can be used as a windproof wall against the air. That is, for example, when the main body of the suction opening body is brought into contact with or separated from the surface to be cleaned, if the wind direction control plate portion 14 is
In a situation in which air is blown toward the surface to be cleaned through the air inlet 129 by blowing on the second brush bristles 14,
3 is in contact with the surface to be cleaned.
Thereby, the air that tends to flow backward along the surface to be cleaned can be blocked. Thus, it is possible to prevent air from flowing from the second brush bristles 143 to the rear of the suction port main body 102 and the accompanying 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 outlet of the return air passage 107 may be only one of the pair of pivots. Further, in the present invention, the blowing control body 104 may be omitted, and the present invention is also applicable to a canister-type air circulation type vacuum cleaner.

[0072]

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

According to the suction opening according to the first aspect of the present invention, the main portion of the suction opening is inclined with respect to the surface to be cleaned by the rotation of the connecting portion and the connecting portion of the main portion of the suction opening. In addition to being able to prevent dust, the dust sucked into the intake port together with the air blown out and collected to the intake port side can be directly sucked into the inner connection pipe, so that the dust absorption performance can be improved and the dust generated during dust collection can be improved. It is possible to suppress clogging and blowing off dust on the surface to be cleaned, and furthermore, it is possible to improve usability, and to use a pivot portion that relatively rotatably connects the connection portion and the main portion of the suction port body. Then, the air from the main body of the vacuum cleaner is returned to the main body of the suction port body, so that there are effects such as a simple structure.

According to the suction opening according to the second aspect of the invention, which is dependent on the first aspect of the invention, in addition to the effect of the first aspect of the present invention, the suction port is returned from the main body of the cleaner to the main portion of the suction opening. The supplied air is supplied to the recirculation outlet from both sides in the width direction of the main body of the suction port body, so that the air blowout from the recirculation outlet extending in the width direction of the main part of the suction port body can be equalized.

The third aspect of the present invention is dependent on the first or second aspect of the present invention.
According to the suction port body according to the invention described in (1), in addition to the effects of the invention of claim 1 or 2, air entering and exiting through the connection portion can be smoothly supplied to the oblique entrance end wall of the inner connection pipe. Since the air can be guided, the loss of the air circulating through the suction port body can be reduced.

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

[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 a plan view showing a part of the configuration of the suction port shown in FIG. 3 in a state where a main part upper case is removed;

7 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. 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. 9 (A).
Sectional drawing shown along a line.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 ... Electric vacuum cleaner, 12 ... Vacuum cleaner main body, 13 ... Suction port body, 31 ... Dust collection bag (filter), 35 ... Electric blower, 101 ... Connection pipe (connection part), 102 ... Suction port main part, 103 ... Reflux outlet, 105 ... Inner connecting pipe, 105c ... Inner connecting pipe inlet 106 ... Outer connecting pipe, 107 ... Return air passage, 108 ... Inner connecting pipe inlet end wall, 109 ... Pivot, 122a ... Bottom wall Reference numerals 123, 124: bearing plate (bearing portion), 127: recovery chamber, 128: blowout chamber, 129: intake port.

Claims (4)

[Claims] An air blower incorporated in a cleaner main body is passed through a filter to capture dust, and the air discharged from the electric blower through the filter is collected and circulated for cleaning. A suction port body provided in a vacuum cleaner having a suction port body having an air suction port for sucking air on an outer surface facing a surface to be cleaned and a bearing portion provided inside; A recirculation outlet for discharging the circulated air to the intake port side, and a pair of pivot portions rotatably supported by the bearing portion; And a connecting portion connected to the cleaner body side in such a manner as to be connected to the vacuum cleaner main body, and the connecting portion has an inner connecting pipe for suction having an entrance facing the intake port, and the pair of pivot portions are connected to each other. Inside of protruding outer connecting pipe Provided with suction port body, characterized in that at least one and return the communicating with the interior of the suction port body main portion over and between two connection pipe air passage of the pair of pivot portions. 2. The recirculation outlet is formed so as to extend in the width direction of the main body of the suction port body, and the pair of pivots are provided in opposite directions to face each other. The suction port body according to claim 1, wherein each of said air passages forms said return air passage. 3. An air suction direction for the inner connection pipe, wherein a distance between the inlet end walls of the inner connection pipe which forms a boundary between the inlet and the pair of pivots is opposite to each other. The suction opening body according to claim 2, wherein the suction opening body is formed so as to be inclined toward the upstream side. 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.