JP2000262441A - Suction piece for vacuum cleaner, and vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce noise to a silent condition by specifying the air-flow noise when a rotary brush is driven in a vacuum cleaner in a suction tool for the vacuum cleaner provided with a rotary brush to be driven by a motor and the vacuum cleaner to be communicated with the suction tool for the vacuum cleaner. SOLUTION: A rotary brush 20 in which a motor 32 for driving is built in a suction chamber 29 of a suction tool body 19 so as to face a suction port 28 opened in a lower side of the suction tool body 19 is rotatable. In the suction tool body 19, the shape of the suction chamber 29 is of the shape along an outer circumferential surface of the rotary brush 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction device for a vacuum cleaner having a rotary brush rotated by an electric motor, and a vacuum cleaner to which the suction device for the vacuum cleaner is connected.

[0002]

2. Description of the Related Art Conventionally, this type of suction device for a vacuum cleaner has
It was configured as shown in FIG. Hereinafter, the configuration will be described.

[0003] As shown in the figure, a suction tool main body 1 includes a rotating brush 2 for releasing dust adhering to a surface to be cleaned such as a carpet.
, A suction port is provided on the bottom surface, and a connection pipe 3 communicating with a cleaner body (not shown) is rotatably provided at a rear portion. The bristle 4 is implanted on the outer peripheral surface of the rotating brush 2,
An electric motor 5 which is a driving source of the rotating brush 2, a planetary gear 6 mounted on the shaft of the electric motor 5, and reduces the rotation and transmits the rotation to the rotating brush 2, and is arranged between the electric motor 5 and the planetary gear 6. And a supporting member 7 provided therein.

The supporting member 7 is fixed to the electric motor 5 by a plurality of screws 8, and a groove 9 is formed on an end face of the supporting member 7, which is in contact with the electric motor 5, to improve ventilation from cooling holes provided in the electric motor 5 to improve heat radiation. The other end face is fitted to the inner ring 10 of the planetary gear 6 and covers the surface of the planetary gear 6. In addition, a key groove (not shown) is provided on the inner peripheral surface of the rotating brush 2, and a convex portion (not shown) projecting from the outer ring of the planetary gear 6 is fitted into the key groove, and a concave portion is formed. The cooling air flow path is formed in the axial direction. A lid 12 having a bearing 11 is attached to the opening at both ends of the rotating brush 2.

[0005] The fixed shaft 13 is formed in a hollow shape, one end of which is protruded to the side of the rotary brush 2, rotatably supports the rotary brush 2 via a bearing 11, and has a hollow lead wire 14 connected to the electric motor 5. The other end is formed in a cylindrical shape and disposed inside the rotating brush 2, and supports the outer periphery of the electric motor 5. The fixed covers 15 are attached to both ends of the rotating brush 2 to prevent dust from entering the rotating brush 2 and the bearing 11.

The rotary brush 2 is supported by the suction tool main body 1 via the fixed cover 15 and the fixed shaft 13, and substantially at the center of the rotary brush 2 opposed to the intake port 16 of the connection pipe 3, the rotary brush 2 is provided. Are formed with a plurality of ventilation holes 17 communicating between the inside and the outside. The leak hole 18 allows the outside air for cooling the electric motor to communicate with the inside of the rotating brush 2 through the hollow portion of the fixed shaft 13, and is formed on the side surface of the suction tool main body 1.

The operation of the above construction will be described. When the main body 1 and the main body of the cleaner are energized, the electric motor 5 rotates.
The rotating torque is increased while being reduced by the planetary gear 6 and transmitted to the rotating brush 2 so that the brush bristles 4 scrape out dust attached to the carpet or the like, and the scraped-out dust is sucked into the cleaner body. At this time, what is rotated by the electric motor 5 is the planetary gear 6, the rotating brush 2 and the lid 1.
The motor 5, the fixed shaft 13, the fixed cover 15, and the lead wire 14 are fixed and held to the suction tool main body 1 only by the outer ring 2 and the bearing 11.

When the cleaner body is operated, a negative pressure is applied to a space surrounded by the suction tool body 1 and the floor, and outside air flows in from the outer periphery of the suction tool body 1 so that the suction port 16 of the connection pipe 3 is opened.
, And the dust on the floor is also sucked into the intake port 16 by the air flow.

At this time, since a negative pressure also acts on the vicinity of the ventilation hole 17 inside the rotary brush 2 through the ventilation hole 17 provided opposite to the suction port 16, the suction tool is inserted through the hollow fixed shaft 13 and the leakage hole 18. A pressure difference is generated between the outside of the main body 1 and a side portion of the rotating brush 2 which is communicated with the outside, and the outside air flows into the inside of the rotating brush 2 through the hollow portion of the fixed shaft 13 through the leak hole 18 and rotates. A recess 2a provided around the electric motor 5 of the brush 2
, And flows toward the air hole 17, and flows out from the air hole 17 toward the air inlet 16 having a lower pressure than the inside of the rotating brush 2.

[0010]

In such a conventional structure, the shape of the suction tool main body 1 is a substantially rectangular parallelepiped having a suction port on the lower surface, and the space between the outer peripheral surface of the rotary brush 2 and the suction tool main body 1 is provided. As shown in FIG. 8, the distance d1 on the surface where the suction tool body 1 and the rotating brush 2 face each other (the distance between the outer circumferential surface of the rotating brush 2 and the inner circumferential surface of the suction tool body 1) is small. Since the distance d2 at the corner of the main body 1 is large, when the rotating brush 2 is rotated, noise due to fluctuation of wind noise due to fluctuation of the space on the outer peripheral surface of the rotating brush 2 or noise due to turbulent flow is generated. And there was a problem that noise during operation was loud.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and has as its object to reduce the noise and reduce the noise by keeping the wind noise when the rotating brush is rotated.

[0012]

According to the present invention, in order to achieve the above object, a driving motor is built in a suction chamber of a suction tool main body so as to face a suction port opened on a lower surface of the suction tool main body. The rotary brush is rotatably provided, and the suction tool body is a vacuum cleaner suction tool in which the shape of the suction chamber is formed along the outer peripheral surface of the rotary brush.

[0013] Thus, the noise can be reduced and the noise can be reduced by keeping the wind noise when the rotating brush is rotated constant.

An electric vacuum cleaner having a dust collecting chamber for collecting dust therein and an electric blower, and having a connection port connected to communicate with the vacuum cleaner suction tool. It is.

Thus, the noise of the vacuum cleaner can be reduced and the noise can be reduced by keeping the wind noise when the rotating brush is rotated constant.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a suction tool main body having a suction port opened on a lower surface and a suction chamber of the suction tool main body rotatably facing the suction port. A rotary brush having a built-in electric motor for driving, wherein the suction tool main body is a suction tool for a vacuum cleaner in which the shape of the suction chamber is formed along the outer peripheral surface of the rotary brush; Since the surface space (the distance between the outer peripheral surface of the rotating brush and the inner peripheral surface of the suction tool main body) is substantially constant, the wind noise caused by the rotation of the rotating brush is always constant, and the space of the outer peripheral surface of the rotating brush changes. (Change in the distance between the outer peripheral surface of the rotating brush and the inner peripheral surface of the suction tool body), noise due to fluctuation of wind noise or noise due to turbulence can be reduced.
The noise can be reduced.

According to a second aspect of the present invention, in the first aspect of the invention, there is provided a suction device for a vacuum cleaner in which the rotating direction of the rotating brush is set to the forward traveling direction, and is generated by the rotation of the rotating brush. Moving wind can flow smoothly behind the suction chamber, reducing wind noise,
The noise can be reduced. In addition, the dust brushed up from the surface to be cleaned by the rotating brush is smoothly and smoothly sucked into the connected body, so that the dust collecting performance can be improved.

According to a third aspect of the present invention, in the first aspect of the present invention, a holding chamber for rotatably holding one end of a connecting body connected to the main body of the vacuum cleaner is formed behind the suction chamber. This is a suction tool for a vacuum cleaner having a rotating part wall surface of the holding chamber as a smooth surface, and the suction airflow passing through the holding chamber has a rotating part wall surface of the holding chamber as a smooth surface. The moving part can be slidably moved on the wall surface, the wind noise can be extremely reduced, and the noise can be reduced. Further, dust sucked in at the same time as the suction airflow can be sucked smoothly without adhering or accumulating on the wall of the rotating part of the holding chamber.

According to a fourth aspect of the present invention, in the third aspect of the present invention, a connection port between the suction chamber and the holding chamber is disposed on the floor side, and a wall of the rotating portion is connected to the connection port. This is a suction tool for a vacuum cleaner in which the cross-sectional shape of the rotating portion wall surface is substantially arc-shaped, and the suction airflow from the suction chamber to the holding chamber has a substantially circular arc-shaped cross-sectional shape of the rotating portion wall surface. The resistance of the wall of the rotating part is reduced, so that wind noise and turbulence are eliminated, and noise can be reduced.

According to a fifth aspect of the present invention, in the vacuum cleaner according to the third or fourth aspect, the height of the suction chamber from the floor surface is equal to or higher than the height of the holding chamber from the floor surface. The suction tool can reduce noise, and the holding chamber is also inserted in the gap where the suction chamber enters, so that the cleaning range can be widened and the cleaning workability can be improved.

[0021] The invention described in claim 6 is the above-mentioned claim 3-
In the invention described in 5, the suction port is a suction tool for a vacuum cleaner that is opened across the suction chamber and the holding chamber, the suction port can be widened, and the suction tool body is placed on the surface to be cleaned. When it is moved, the suction wind that combines the moving wind and the suction airflow comes into contact with the surface to be cleaned for a long time, and the dust collection efficiency can be improved.

The invention described in claim 7 is the above-mentioned claim 1 to claim 1.
In the invention described in Item 6, the suction tool main body is a suction tool for a vacuum cleaner comprising a lower case having a suction port opened on a lower surface, and an upper case covering an upper part of the lower case. The suction tool main body having a shape along the surface can be easily molded by a mold, can be configured at a low cost, and can achieve noise reduction and improvement in dust collection efficiency.

According to an eighth aspect of the present invention, in the seventh aspect of the present invention, a shaft supporting portion of the rotating brush is provided on a side wall of the lower case, and the side wall projects upward from a front upper side of the lower case. The vacuum cleaner suction tool that is formed.When the upper case and the lower case are made of synthetic resin, the shaft support part of the rotating brush provided on the side wall of the lower case can be reinforced, and the built-in rotary The brush can be stably held, the rotation of the rotating brush can be stabilized, and the dust scraping performance can be stabilized.

According to a ninth aspect of the present invention, there is provided a vacuum cleaner having a dust collection chamber for collecting dust therein and an electric blower,
A vacuum cleaner having a connection port connected to communicate with the vacuum cleaner suction tool according to any one of claims 1 to 8, which reduces noise when a rotating brush is rotated. Thus, the noise of the vacuum cleaner can be reduced, and the noise can be reduced.

[0025]

An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 6, the suction tool main body 19 has a built-in rotary brush 20 (see FIG. 1) for releasing dust adhering to a surface to be cleaned such as a carpet, and a connection connected to an extension tube 21 at the rear. The body 22 is provided rotatably. Vacuum cleaner body 2
3 is a dust collecting chamber 24 for collecting dust inside and an electric blower 2
5, a connection port 2 provided in the cleaner body 23.
6, a hose 27 connected to the extension pipe 21 is connected, and the connecting body 22 of the suction tool main body 19 is connected to the connection port 26.

Here, the structure of the rotary brush 20 will be described first with reference to FIGS.

As shown in FIG. 2, the rotating brush 20 is rotatably provided in a suction chamber 29 of the suction tool main body 19 so as to face a suction port 28 opened on the lower surface of the suction tool main body 19. The rotary brush 20 has a plurality of brushes 31 forming a dust scraping portion on an outer peripheral surface of a substantially cylindrical brush holder 30 formed of a thermoplastic resin such as ABS, polystyrene, or polypropylene.

The dust scraping portion may be a thin plate-shaped blade, a strip having a wiping effect (for example, a cloth strip) or the like in addition to the brush 31, and a combination of these as appropriate. It may be.

As shown in FIG. 3, an electric motor 3 for rotatingly driving the rotating brush 20 is provided inside the brush holder 30.
2, a reduction gear 33 for reducing the rotation speed of the electric motor 32, and a gear 3 for transmitting the output of the reduction gear 33 to the brush holder 30.
4 and so on. Here, the rotating brush 20 incorporates the electric motor 32, the speed reducer 33, and the like, and has a diameter of 26 mm to 43 mm from the torque of the electric motor 32 and the performance of scraping up dust at the tip of the brush 31 on the outer peripheral surface. .

The motor 32 is composed of a commutator motor, and is provided with a motor board 35 on which a rectifier for rectifying a commercial power supply voltage, a noise suppressor, and the like are mounted. Connected lead wire 36
And is configured to be driven by a rectified voltage of the commercial power supply voltage. Here, the rotation speed of the electric motor 32 is
Since rotation is transmitted to the brush holder 30 via the reduction gear 33, the rotation speed is set to 3000 rpm to 15000 rpm. 3000rpm ~ 12000r when cleaning carpet
pm is preferred.

The speed reducer 33 is constituted by a planetary gear and connects the output shaft 37 of the electric motor 32 to reduce the rotational speed of the electric motor 32. Here, the reduction ratio of the reduction gear 33 is 1/3 to 1/9.
(Preferably, 1/5 to 1/7). The sound insulation tube 38 is
The sound is shielded by covering the outer periphery of the reduction gear 33, and is formed by aluminum die casting or plastic molding. The motor 32 is held and fixed via the sound insulation tube 38, and the motor 32 and the reduction gear 33 are integrally connected to each other, and the gear 34 is fitted to the output shaft 39. Bearing part 40
The brush holder 30 supports a reduction gear 33 integrally formed with the motor 32. The inner ring is fixed to the small diameter portion 41 of the reduction gear 33, and the outer ring is fixed to the brush holder 30.
Is supported by the bearing support portion 42 of the first embodiment.

On the commutator 32a side of the motor 32, a hollow shaft 43 having a hollow inner diameter and supporting the motor 32 integrally formed with the reduction gear 33 is fixed. The hollow shaft 43 is made of a material that is hardly deformed, such as an aluminum alloy, carbon steel (S45C), or industrial plastic, and has an inner diameter of 13 mm so that cooling air can be smoothly introduced. The inner ring of the bearing 44 is fixed to the hollow shaft 43, and the outer ring is supported by a cap 45 fixed to the end of the brush holder 30.

The gear 34 is made of an industrial plastic such as polyacetal or polyamide.
0 meshes with a gear 46 formed on the inner surface of the
A cushioning material 47 made of rubber, elastomer, or the like is interposed between the portions that mesh with 6, and the sound of meshing between the tooth profiles is buffered by the elasticity of rubber, elastomer, or the like.

Here, the gear portion 46 is provided in the brush holder 3.
0 is formed on the inner surface at the substantially central portion in the axial direction.
4 is connected to the brush holder 30 at a substantially central portion in the axial direction of the brush holder 30. A cooling air passage hole 48 is provided outside the gear portion 46.
Communicates with the cooling air passage 49 passing from the hollow shaft 43 to the outside of the electric motor 32 and the reduction gear 33, and also communicates with the ventilation hole 50 provided on the outer peripheral surface of the brush holder 30.

The ventilation hole 50 is provided at a position facing the connecting body 22, and a dust filter 51 is formed on the inner surface of the brush holder 30.
Is provided to prevent dust from entering the inside of the brush holder 30 through the ventilation hole 50. A partition wall 52 is provided integrally with the brush holder 30 between the gear portion 46 and the ventilation hole 50 to prevent dust from entering the reduction gear 33 from the ventilation hole 50 side, and at the same time, noise generated by the reduction gear 33, or The noise caused by the engagement between the gear 34 and the gear portion 46 is prevented from leaking from the vent hole 50.

As shown in FIGS. 1 and 4, the suction tool main body 19 has a lower case 53 having a suction port 28 opened on the lower surface.
And an upper case 54 that covers the upper part of the lower case 53. These lower case 53 and upper case 54
The suction chamber 29 is formed of a thermoplastic resin such as BS, polystyrene, or polypropylene, and the rotating brush 20 is rotatably provided. The shape of the suction chamber 29 is formed along the outer peripheral surface of the rotating brush 20, and the rotating direction of the rotating brush 20 advances forward. The direction is set.

A holding chamber 55 is formed behind the suction chamber 29,
The holding chamber 55 rotatably holds one end of the connecting body 22 connected to the vacuum cleaner main body 23 by a shaft 56. When the connecting body 22 is rotated, the end face of the connecting body 22 is held by the holding chamber 55. The sliding wall surface 57 of the holding chamber 55 has a smooth surface.

A front roller 58 and a rear roller 59 which are in contact with the floor are rotatably provided on the suction tool main body 19, and the height h1 of the suction chamber 29 from the floor is the height of the holding chamber 55 from the floor. h2 or more. The suction port 28 is connected to the suction chamber 2.
9 and the holding chamber 55. That is, as shown in FIG. 2, the rear end 29a of the suction chamber 29 has a width d.
Only into the holding chamber 55. Further, a connection port 60 between the suction chamber 29 and the holding chamber 55 is arranged on the floor side,
The rotating portion wall surface 57 is connected to the connection port 60, and the cross-sectional shape of the rotating portion wall surface 57 is substantially circular.

As shown in FIG. 5, a side wall 61 of the lower case 53 is formed so as to protrude upward from a front upper side of the lower case 53, and a shaft supporting portion 62 for supporting the rotary brush 20 is provided on the side wall 61. The end of the rotating brush 20 is supported by the shaft supporting portion 62 with a buffer member 63 interposed therebetween. The cushioning member 63 is formed of a material having excellent elasticity, such as rubber or elastomer, and absorbs vibration and chatter due to rotation of the rotating brush 20 to make it difficult to transmit the vibration to the suction device main body 19. An intake hole 64 is provided on a side surface of the suction tool main body 19 facing the hollow shaft 43, and a filter 65 is interposed between the intake hole 64 and an end surface of the hollow shaft 43.

The operation of the above construction will be described. When electricity is supplied to the suction tool main body 19 and the cleaner main body 23, the electric motor 32 incorporated in the rotary brush 20 is rotated, decelerated by the speed reduction device 33, and the rotational torque is increased to rotate. Brush 20
Is driven to rotate. With the rotation of the rotating brush 20, the dust adhered to the carpet or the like is scraped up by the brush 31 provided on the outer peripheral surface of the brush holder 30, and the scraped up dust is sucked into the cleaner body 23 via the extension pipe 21 and the hose 27. Is done.

Here, the rotating brush 20 has a built-in electric motor so that its diameter is larger than that of the conventional one. The speed is increased, and the performance of scraping dust from the surface to be cleaned can be improved.

At this time, a negative pressure is applied to the space surrounded by the suction tool main body 19 and the floor surface, and outside air flows in from the outer periphery of the suction tool main body 19, and the dust on the floor surface is also passed through the connecting body 22 by this air flow. It is sucked into. Since a negative pressure also acts on the vicinity of the ventilation hole 50 inside the rotary brush 20 through the ventilation hole 50 provided facing the connecting body 22, the outside air rotates through the hollow portion of the hollow shaft 43 from the intake hole 60. Brush 20
Flows into the interior.

The cooling air passage 48 and the gear portion 4 passing outside the motor 32 and the speed reducer 33
6 passes through a passage hole 48 provided outside the dustproof filter 51.
The cooling air flowing out of the ventilation hole 50 through the cooling air is generated, and cools the electric motor 32, the electric motor substrate 35, and the like.

On the other hand, in the suction device main body 19, since the shape of the suction chamber 29 is formed along the outer peripheral surface of the rotating brush 20, the space on the outer peripheral surface of the rotating brush 20 (the outer peripheral surface of the rotating brush 20 and the suction device main body 19 Of the rotating brush 20, the wind noise caused by the rotation of the rotating brush 20 is always constant, and the change of the space on the outer circumferential surface of the rotating brush 20 (the outer circumferential surface of the rotating brush 20 and the suction tool main body). 19 (a change in the distance from the inner peripheral surface of the motor 19), noise due to fluctuation of wind noise or noise due to turbulence can be reduced, and noise can be reduced.

Further, the shape of the suction chamber 29 is
And the rotating direction of the rotating brush 20 is set to the forward traveling direction, so that the moving wind moving on the outer circumferential surface of the rotating brush 20 with the rotation of the rotating brush 20 is rectified, and the suction device main body 19 is rotated. The suction air flow sucked from the front and the rectified moving wind can be smoothly combined and sucked, and the suction air combined with the suction air flow and the moving wind can smoothly flow into the connecting body 22. Therefore, wind noise can be reduced and noise can be reduced. In addition, since the dust brushed up from the surface to be cleaned by the rotating brush 20 is smoothly and smoothly sucked into the connecting body 22, the dust collecting performance can be improved.

Further, since the rotating portion wall surface 57 of the holding chamber 55 formed behind the suction chamber 29 has a smooth surface, the suction airflow passing through the holding chamber 55 causes the rotating portion wall surface 5 of the holding chamber 55 to pass through.
7, the wind noise can be extremely low, and the noise can be reduced. Further, the dust sucked in at the same time as the suction airflow is generated by the rotating portion wall surface 57 of the holding chamber 55.
It is sucked smoothly without adhering or accumulating on the surface, and the dust collecting performance can be improved. Further, since no dust adheres or accumulates on the rotating portion wall surface 57 of the holding chamber 55, when the cleaning operation is completed, the dust does not drop on the surface to be cleaned, and the usability can be improved.

A connection port 60 between the suction chamber 29 and the holding chamber 55 is arranged on the floor side, and the connection port 60 is provided with a rotating portion wall surface 57.
And the cross-sectional shape of the rotating portion wall surface 57 is substantially arc-shaped, so that the suction airflow from the suction chamber 29 into the holding chamber 55 is less affected by the resistance of the rotating portion wall surface 57, and Cut noise and turbulence are eliminated, and noise can be reduced.

Further, the rectified moving wind and the suction air flow can be smoothly merged and sucked, and the suction wind that has merged the moving wind and the suction air flow can be cleaned from the front end to the rear end of the suction port 28. Since the air flows into the holding chamber 55 while moving on the surface, the suction port 28 is opened across the suction chamber 29 and the holding chamber 55, so that the suction air comes into contact with the surface to be cleaned for a long time, and the dust Can improve the collection efficiency.

Further, since the height of the suction chamber 29 from the floor surface is equal to or higher than the height of the holding chamber 55 from the floor surface, the suction chamber is inserted into the gap between the surfaces to be cleaned such as under the bed. The suction chamber does not enter, and the suction tool main body 19 can be inserted all the way to extend the cleaning range, thereby improving the cleaning workability.

The suction tool main body 19 has a suction port 2 on its lower surface.
Since the lower case 53 includes the lower case 53 having the opening 8 and the upper case 54 that covers the upper part of the lower case 53, the suction tool main body 19 having a shape along the outer peripheral surface of the rotating brush 20 can be easily molded. It is possible to reduce noise and improve dust collection efficiency.

The shaft support 62 of the rotary brush 20 is provided on the side wall 61 of the lower case 53, and the side wall 61 is formed to protrude upward from the front upper side of the lower case 53. The shaft support portion 62 of the rotating brush 20 provided at 61 can be reinforced, and the rotating brush 20 incorporating the electric motor 32 can be stably held,
The rotation of the rotating brush 20 can be stabilized, and the scraping performance can be stabilized.

[0053]

As described above, according to the first aspect of the present invention, the suction tool main body having the suction port opened on the lower surface, and the suction chamber of the suction tool main body facing the suction port. And a rotating brush rotatably provided with a built-in motor for driving. The suction tool main body has a shape of the suction chamber along the outer peripheral surface of the rotating brush, so that noise can be reduced.

According to the second aspect of the present invention, since the rotating direction of the rotating brush is set to the forward traveling direction, the moving wind generated by the rotation of the rotating brush is combined with the suction air which is the suction air flow. It can flow smoothly into the body,
Wind noise can be reduced, noise can be reduced, and dust collection performance can be improved.

According to the third aspect of the present invention, a holding chamber for rotatably holding one end of a connecting body connected to the main body of the vacuum cleaner is formed behind the suction chamber. Since the moving part wall surface is a smooth surface, dust sucked in at the same time as the suction airflow does not adhere or accumulate on the rotating part wall surface of the holding chamber, and the dust collection performance can be improved.

According to the fourth aspect of the present invention, the connection port between the suction chamber and the holding chamber is disposed on the floor side, and the connection port is connected to the wall of the rotating portion. Since the cross-sectional shape is substantially arcuate, the resistance of the wall surface of the rotating part is lessened, and the noise can be reduced.

According to the fifth aspect of the present invention, since the height of the suction chamber from the floor is equal to or higher than the height of the holding chamber from the floor, cleaning workability can be improved. .

According to the sixth aspect of the present invention, since the suction port is opened across the suction chamber and the holding chamber, the dust collection efficiency can be improved.

According to the seventh aspect of the present invention, the suction tool main body is composed of the lower case having the suction port opened on the lower surface and the upper case covering the upper part of the lower case. , And at a low cost.

According to the eighth aspect of the present invention, the shaft supporting portion of the rotating brush is provided on the side wall of the lower case, and the side wall is formed so as to protrude above the front upper side of the lower case. Can be rotated stably.

According to the ninth aspect of the present invention, there is provided a vacuum cleaner body having a dust collection chamber for collecting dust therein and an electric blower, according to any one of the first to eighth aspects. Since the connection port is provided so as to communicate with the vacuum cleaner suction tool, noise of the vacuum cleaner can be reduced, and noise can be reduced.

[Brief description of the drawings]

FIG. 1 is a partially cut-away side view of a vacuum cleaner suction tool according to one embodiment of the present invention.

FIG. 2 is a sectional view of the suction device for the electric vacuum cleaner.

FIG. 3 is an exploded perspective view of a main part of the suction device for the electric vacuum cleaner.

FIG. 4 is a sectional view taken along line AA of FIG. 2;

FIG. 5 is an enlarged perspective view of the lower case constituting the suction tool main body of the suction tool for the electric vacuum cleaner, with a part cut away;

FIG. 6 is a perspective view of the vacuum cleaner having the vacuum cleaner suction tool.

FIG. 7 is a cross-sectional view of a conventional vacuum cleaner suction tool.

FIG. 8 is a sectional view taken along line BB of the suction tool for the electric vacuum cleaner.

[Explanation of symbols]

 19 suction tool body 20 rotating brush 28 suction port 29 suction chamber 32 electric motor

Continued on the front page (72) Inventor Katsutaka Murata 1006 Kazuma Kadoma, Kadoma-shi, Osaka Matsushita Electric Industrial Co., Ltd. F-term (reference) 3B061 AA06 AA26 AA41 AD05 AD12 AD17 AE02 AE13

Claims (9)

[Claims] 1. A suction tool main body having a suction port opened on a lower surface, and a rotary brush rotatably provided in a suction chamber of the suction tool main body so as to face the suction port and having a built-in electric motor for driving. The suction tool body is a suction tool for a vacuum cleaner, wherein the shape of the suction chamber is formed along the outer peripheral surface of the rotating brush. 2. The suction device for a vacuum cleaner according to claim 1, wherein the rotating direction of the rotating brush is set to a forward traveling direction. 3. A holding chamber for rotatably holding one end of a connecting body connected to the main body of the vacuum cleaner is formed behind the suction chamber,
2. The suction device for a vacuum cleaner according to claim 1, wherein the wall of the rotating portion of the holding chamber has a smooth surface. 4. The connecting port between the suction chamber and the holding chamber is arranged on the floor surface side, the connecting port is connected to a wall of the rotating portion, and the cross-sectional shape of the wall of the rotating portion is substantially arc-shaped. The suction device for a vacuum cleaner according to the above. 5. The suction tool for a vacuum cleaner according to claim 3, wherein the height of the suction chamber from the floor is equal to or higher than the height of the holding chamber from the floor. 6. The suction tool for a vacuum cleaner according to claim 3, wherein the suction port is open across the suction chamber and the holding chamber. 7. The electric cleaning apparatus according to claim 1, wherein the suction tool main body includes a lower case having a suction port opened on a lower surface, and an upper case covering an upper part of the lower case. Suction tool for machine. 8. The suction tool for a vacuum cleaner according to claim 7, wherein a shaft support portion of the rotating brush is provided on a side wall of the lower case, and the side wall is formed to protrude above an upper front side of the lower case. 9. A vacuum cleaner main body having a dust collection chamber for collecting dust therein and an electric blower so as to communicate with the vacuum cleaner suction tool according to any one of claims 1 to 8. Vacuum cleaner with a connection port to be connected to.