JP2002345697A - Suction tool for electric vacuum cleaner and electric vacuum cleaner using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suction tool for an electric vacuum cleaner provided with a silent and highly strong agitator and the electric vacuum cleaner using it. SOLUTION: A freely rotatable agitator 6 is provided inside, the agitator 6 is constituted of a rotor (9, 10) and a dust rake-up part 11 provided in the rotor (9, 10) and the rotor (9, 10) is constituted of the outer shaft 9 of a synthetic resin molding and a metallic inner shaft 10 passing through the rotation center of the outer shaft 9. Sufficient strength is secured even when the entire length of the agitator 6 increases and vibration sound generated at the time of rotation is reduced since even a warp by molding is corrected by the metallic inner shaft 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vacuum cleaner used in ordinary households, and more particularly to an agitator for scraping dust on a floor.

[0002]

2. Description of the Related Art A conventional agitator of this type is disclosed in
-15474. Hereinafter, description will be made with reference to FIG. Numeral 100 denotes a rotor made of a synthetic resin having a long axis, and an agitator 104 is formed by attaching a dust scraping portion 101 to a groove 102 provided on the outer periphery symmetrically about the axis. Reference numeral 103 denotes a rotating support shaft made of metal attached to both ends of the rotor 100.

[0003]

However, in the conventional configuration, since the rotor 100 is relatively long, there is a problem that high vibration noise is generated when the rotor 100 is rotated at a high speed due to a warp or the like during molding. Was. Further, since the rotor 100 is simply formed of a synthetic resin, there is a problem that the rotor 100 is broken by an impact during use.
Furthermore, when the support shafts 103 attached to both ends are inclined at a slight angle, the same imbalance occurs as described above, causing a problem that the vibration noise is high.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and has as its object to provide a suction device for a vacuum cleaner having an agitator having a quiet and high strength and a vacuum cleaner using the same. With the goal.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned conventional problems, the present invention has a rotatable agitator provided therein, and the agitator comprises a rotor and a dust scraper provided on the rotor. In addition, the rotor is composed of an outer shaft made of a synthetic resin molded product and an inner shaft made of metal penetrating the center of rotation of the outer shaft, so that sufficient strength can be ensured even if the entire length of the agitator is long. In addition, since warpage due to molding is corrected by the inner shaft of the metal, vibration noise generated during rotation is reduced.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first aspect of the present invention, a rotatable agitator is provided inside, and the agitator comprises a rotor and a dust scraper provided on the rotor. It is composed of an outer shaft of a resin molded product and an inner shaft made of metal penetrating the rotation center of the outer shaft. Since the vibration is corrected by the inner shaft, vibration noise generated during rotation is reduced.

According to a second aspect of the present invention, in the configuration of the first aspect, the outer shaft is made of a synthetic resin material to which a reinforcing material such as glass fiber is added. And the strength can be secured in a well-balanced manner.

According to a third aspect of the present invention, in the configuration of the first or second aspect, the outer diameter of the inner shaft is less than half or 6 mm or less of the outer diameter of the outer shaft. The strength can be secured in a well-balanced manner without making the large inner shaft too large.

[0009] The invention according to claim 4 is the above-mentioned claims 1-3.
In the configuration according to any one of the above, the inner shaft is made of a synthetic resin material to which a reinforcing material such as glass fiber is added, has the same strength as metal, and has a further reduced mass. -Rotation of the rotor is improved.

[0010] The invention according to claim 5 is the above-mentioned invention.
In the configuration according to any one of the above, the material of the outer shaft or the inner shaft or both is made of a conductive resin, and the dust scraper made of a rubber blade or a bristle brush attached to the outer shaft has a floor made of a carpet or the like. It is possible to suppress the generation of static electricity generated by friction with the material, prevent dust from adhering to the suction tool, and improve dust collection performance.

[0011] The invention according to claim 6 is the above-mentioned invention.
In the configuration according to any one of the above, a gate at the time of molding the outer shaft is provided at an end of the outer shaft, and the gate is covered with another component provided at the end of the outer shaft, and resin molding is performed. Since the flow of resin at the time is smooth, warpage during molding is suppressed, and the gate of the outer shaft is covered by a separate part, so that the gate marks do not get caught on the carpet, etc. There is no fear of such things.

[0012] The invention of claim 7 provides the above-mentioned claims 1-6.
In the configuration according to any one of the above, a dust collection chamber having a lower opening, an agitator rotatably provided in the dust collection chamber,
A suction device for a vacuum cleaner having a communication portion for communicating the dust collection chamber with the outside air, and rotating by receiving the suction air passing through the communication portion by the agitator; In the suction tool, which occupies most of the rotation noise, sufficient strength can be ensured even if the overall length of the agitator is long, and since the warpage due to molding is corrected by the inner shaft of the metal, the vibration noise generated during rotation is reduced. The effect is great.

According to an eighth aspect of the present invention, there is provided an electric vacuum cleaner having the electric blower and the suction device for an electric vacuum cleaner according to any one of the first to seventh aspects, which is connected to the electric blower. And a vacuum cleaner using the same.

[0014]

(Embodiment 1) Hereinafter, Embodiment 1 of the present invention will be described with reference to FIGS. FIG. 1 is a configuration diagram of the suction tool.
FIG. 2 is a perspective view of the agitator.

1 and 2, reference numeral 1 denotes a suction tool, which is constituted by an upper body 2 and a lower body 3, and an arm body 4 which is rotatably supported up and down on the surface to be cleaned is provided at the rear. A pipe body 5 attached thereto and further connected to a cleaner body (not shown) side is attached. Reference numeral 6 denotes an agitator rotatably provided by a motor 7 via a belt 8. The agitator 6 includes an outer shaft 9 made of a synthetic resin such as nylon, and an inner shaft 10 made of a metal such as iron penetrating the rotation center of the outer shaft 9. And a dust scraper 11 made of a rubber blade or a bristle brush symmetrically attached to the outer periphery of the outer shaft 9. 12 is the suction tool 1
13 is a front roller for traveling of the suction tool 1,
14 is a rear roller. Reference numeral 15 denotes a pulley for transmitting the rotation of the motor 7 to the agitator 6 via the belt 8. In this embodiment, the total length of the agitator 6 is 150 mm or more.

The operation of the above configuration is as follows.
In the agitator 6, the outer shaft 9 is formed of a highly rigid nylon material, and the inner shaft 10 made of metal is provided so as to penetrate the center of rotation. Therefore, sufficient strength can be ensured even if the total length of the shaft is 150 mm or more. Since the warpage of molding or the like is corrected by the metal inner shaft 10, vibration noise generated by rotation is greatly reduced. Here, the reason why the total length of the agitator 6 is 150 mm or more is that the longer the total length is, the larger the amount that can be collected at a time and the more efficient the dust collecting performance of the vacuum cleaner. This is because the warpage during molding is large and the strength is extremely reduced.

If the outer shaft 9 is molded from a synthetic resin material such as nylon containing a reinforcing material such as glass fiber of 10% or more, the strength of the outer shaft 9 is further improved.

Further, since the outer diameter of the inner shaft 10 made of metal is set to less than half the outer diameter of the outer shaft 9 or 6 mm or less, the mass of the agitator 6 is reduced, and the inner shaft 1 having a large mass is reduced.
The strength can be secured in a well-balanced manner without making 0 too large.
When the agitator 6 is rotated by the motor 7, the load on the motor 7 is reduced.

When the inner shaft 6 is formed of a synthetic resin material such as nylon containing 20% or more of a reinforcing material such as glass fiber, the mass can be reduced while having the same strength as the metal shaft.

When the outer shaft 9 or the inner shaft 10 or both materials are formed of a conductive resin material containing carbon or the like, the dust scraper 11 made of a rubber blade or a bristle brush attached to the rotor, The generation of static electricity caused by friction with the surface to be cleaned, such as a carpet, can be suppressed, the dust is prevented from adhering to the suction tool main body 1, and the dust collecting performance is improved.

(Embodiment 2) Embodiment 2 will be described with reference to FIG. The same components as those in the first embodiment are denoted by the same reference numerals, and the description is omitted. In the figure, reference numeral 15 denotes a pulley for transmitting the driving force of the motor 7 to the agitator 6 via the belt 8. Here, reference numeral 16 denotes a gate portion for molding the outer shaft 9 with a mold, which is provided at an end of the outer shaft 9. Therefore, since the gate portion 16 of the outer shaft 9 is provided at one end, the flow of the resin at the time of resin molding becomes smooth, and the warpage at the time of molding is suppressed. Furthermore, pulley 15
Is attached to the outer shaft 9 so as to cover the gate portion 16. The pulley 15 is connected to the gate portion 16 of the outer shaft 9.
To cover the gate, so that the gate marks do not get caught on the carpet,
Further, even if a person touches the outer shaft 9, there is no risk of injury.

(Embodiment 3) Embodiment 3 will be described with reference to FIGS. In FIG. 4, reference numeral 17 denotes a suction tool main body and 1 on the main body.
A dust collecting chamber 35 having a lower opening is formed by the lower body 8 and the lower body 19, and an arm body 20 rotatably held back and forth rearward and a pipe 21 connected to the cleaner body side (not shown) are attached. ing. Reference numeral 22 denotes an agitator, which is a rotor composed of an outer shaft 23 formed of a synthetic resin such as nylon and an inner shaft 24 formed of metal penetrating the center of rotation of the outer shaft 23. The dust collecting chamber 35 includes a plurality of dust scrapers 25 provided on the outer periphery.
Is located within. Reference numeral 26 denotes a communication part provided in the lower part 19 of the main body to communicate the outside air and the dust collecting chamber 35, and an electric blower (not shown) built in the main body of the cleaner passing therethrough.
The suction wind generated by the agitator impinges on the dust-raising unit 25 and rotates the agitator 22 to scrape and collect dust on the surface to be cleaned. The agitator 22 is rotated without using a motor. Normal rotation speed is 4000 rpm or less.

In FIG. 5, a plurality of dust scraping portions 25 are provided symmetrically on the outer periphery of the outer shaft 23. In this case, there are six cases, but at least four or more are required to rotate the agitator 22 by the suction wind. 2
Reference numeral 7 denotes a support shaft attached to both ends of the outer shaft 23 and bearings 28.
Thus, the suction tool 17 is rotatably held by the suction tool 17.

The operation of the above configuration is as follows.
The agitator 22, which is rotated by an intake air generated by an electric blower (not shown) built in the cleaner body, is made of a synthetic resin material such as a nylon resin as described above. Rotation is possible, and dust on the surface to be cleaned can be reliably lifted.

Furthermore, since the rotor can be made longer than before, the dust collecting performance is improved, and the warpage of the rotor is reduced, so that no abnormal sound is generated even if the rotation speed is increased.

(Embodiment 4) Hereinafter, a fourth embodiment of the present invention will be described with reference to FIG. A cleaner body 32 having a dust chamber 31 for collecting dust therein and an electric blower 33,
A vacuum cleaner having a connection port 34 connected through a hose 30 and an extension pipe 29 to communicate with one of the suction tool bodies 1 and 17 of any of the above-described embodiments. A vacuum cleaner suction tool having an agitator and a vacuum cleaner using the same can be provided.

[0027]

According to the present invention, it is possible to provide a suction device for a vacuum cleaner having an agitator with low noise and high strength, and a vacuum cleaner using the same.

[Brief description of the drawings]

FIG. 1 is a sectional view showing the structure of a suction tool according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the agitator.

FIG. 3 is an exploded perspective view of an agitator showing a second embodiment of the present invention.

FIG. 4 is a sectional view showing the structure of a suction tool according to a third embodiment of the present invention.

FIG. 5 is a perspective view of the agitator.

FIG. 6 is an overall view of a vacuum cleaner showing a fourth embodiment of the present invention.

FIG. 7 is a perspective view of a conventional agitator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Suction tool 6 Agitator 9 Outer shaft 10 Inner shaft 15 Pulley (separate part)

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Katsutaka Murata 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. Term (reference) 3B061 AD04 AD12 AD17 AE05

Claims (8)

[Claims] 1. A rotatable agitator is provided inside, said agitator comprising a rotor and a dust scraper provided on said rotor, said rotor comprising an outer shaft of a synthetic resin molded product and said outer shaft. Vacuum cleaner suction tool consisting of an inner shaft made of metal penetrating the center of rotation of the shaft. 2. The suction tool for a vacuum cleaner according to claim 1, wherein the outer shaft is made of a synthetic resin material to which a reinforcing material such as glass fiber is added. 3. The suction tool for a vacuum cleaner according to claim 1, wherein an outer diameter of the inner shaft is equal to or less than half or less than or equal to 6 mm of an outer diameter of the outer shaft. 4. The suction tool for a vacuum cleaner according to claim 1, wherein the inner shaft is made of a synthetic resin material to which a reinforcing material such as glass fiber is added. 5. The suction device for a vacuum cleaner according to claim 2, wherein the outer shaft, the inner shaft, or both materials are made of a conductive resin. 6. The gate according to claim 1, wherein a gate at the time of molding the outer shaft is provided at an end of the outer shaft, and the gate is covered with another component provided at the end of the outer shaft. The suction device for a vacuum cleaner according to the above. 7. A dust collecting chamber having a lower opening, an agitator rotatably provided in the dust collecting chamber, and a communicating part for communicating the dust collecting chamber with the outside air, and suction air passing through the communicating part. The agitator is rotated by receiving the agitator.
The suction device for a vacuum cleaner according to any one of claims 1 to 7. 8. An electric vacuum cleaner comprising an electric blower and the suction device for an electric vacuum cleaner according to claim 1, which communicates with the electric blower.