JP2000060775A - Vacuum cleaner suction tool and vacuum cleaner - Google Patents

Abstract

(57) [Summary] [PROBLEMS] The present invention is capable of forming a brush body composed of brushes each having a suitable length for both a floor surface and a carpet surface, thereby efficiently cleaning each cleaning surface. An object of the present invention is to provide a vacuum cleaner suction tool that can be cleaned and a vacuum cleaner using the same. SOLUTION: A rotatable agitator 19 is provided inside,
The agitator 19 is connected to a rotor 20 and the rotor 2
A suction device for a vacuum cleaner, wherein the suction member is formed of a brush body 23 in a longitudinal direction around 0, and the brush body 23 is constituted by a group of brushes having different protrusion margins.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction tool for a vacuum cleaner and a vacuum cleaner using the suction tool.

[0002]

2. Description of the Related Art Heretofore, a suction tool for an electric vacuum cleaner of this type is generally one shown in FIGS. The agitator-2 is provided inside the suction tool body 1 and the agitator-2 is installed.
Is composed of a rotatable rotor 3, a plurality of protruding bands 4 provided in the longitudinal direction around the rotor, and a brushed cloth brush body 5 made of fine pile cut pile spinning cloth. The agitator-2 is rotated by using a motor (not shown) or an air turbine (not shown) that uses suction air as a drive source to clean the floor 6 and the carpet 7. By colliding the protruding strip 4 and the brush body 5 with the surface, dust is scraped up and cleaned.

[0003]

However, in the structure of the conventional agitator, as shown in FIG. 11, the tip of the brush body is set so as to contact the floor surface. As shown in Fig. 12, the cut end surface 5a of the bristle tip of the brush body 5 escapes rearward in the rotational direction, which causes a problem that the force for scraping dust is reduced.

The present invention solves the above-mentioned conventional problems, and particularly provides a suction tool for an electric vacuum cleaner which improves the scraping power of dust on a carpet and improves the dust collection performance. The purpose is to do.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention has a rotatable agitator provided therein, the agitator being a rotor and a longitudinal length around the rotor. It is formed by a brush body provided in the direction, and the brush body is constituted by a group of brushes having different protrusion margins.

According to the above invention, the tip of the brush group having a large protrusion margin is set to abut on the floor surface, and the tip of the brush group having a small protrusion margin is set to abut on the carpet. When the turret is rotated, the cut end surface of the brush tip of the brush group with a large protrusion margin collides with the floor surface on the floor surface, and the cut end surface of the brush tip of the brush group with a small protrusion margin collides with the carpet surface on the carpet. Therefore, by providing a brush group with a length suitable for carpet cleaning, the effect of scraping dust at the brush bristle tip on the carpet is improved compared with the conventional one, and the dust collection performance is improved and the floor surface is improved. Since a brush group of a length suitable for cleaning is also provided on one brush body at the same time, it is possible to efficiently clean all cleaning surfaces without increasing costs such as increase in man-hours for inserting the brush body into the rotor. Is.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention is
A rotatable agitator is provided internally, the agitator is formed by a rotor and a brush body provided in the longitudinal direction around the rotor, and the brush body is formed by a group of brushes having different protrusion margins. It is configured so that the tip of the brush group with a large protrusion margin contacts the floor surface and the tip of the brush group with a small protrusion margin contacts the carpet, so that the agitator rotates on the floor surface. Since the cut end surface of the bristles of the brush group with a large protrusion margin collides with the floor surface, and the cut end surface of the bristles of the brush group with a small protrusion margin collides with the carpet surface, the length is suitable for carpet cleaning. By providing the brush group of, the brush group has a length suitable for cleaning the floor while improving the dust collection performance by improving the effect of scraping dust on the brush tip on the carpet compared to the conventional brush group. Since it is also installed on one brush at the same time, Shi body without causing the cost-up, such as increasing insertion steps of, in which all of the cleaning surface can be efficiently cleaned.

According to a second aspect of the present invention, a brush group having a large protrusion margin is sandwiched between brush groups having a small protrusion margin. The tip of the brush group having a large protrusion margin is the floor surface and the protrusion. By setting the tip of the small brush group to contact the carpet, the cut end face of the brush tip of each brush group faces the cleaning surface when the agitator rotates, both on the floor and on the carpet. Thus, it is possible to improve the effect of scraping up dust on the tips of hair, as compared with the conventional case. Furthermore, by providing a brush group having a small protrusion margin behind the brush group having a large protrusion margin, it is possible to prevent the bristle cutting surface of the brush group having a large protrusion margin from escaping from the carpet surface, and While improving the dust collection performance, it is possible to prevent bending of the brush group with a large protrusion margin by bending it with the brush group with a small protrusion margin in the front and rear of the rotation direction, while maintaining a soft feeling of floor cleaning. The dust collection performance can be improved even on the floor surface.

According to a third aspect of the present invention, a brush group having a small protrusion margin is formed to be harder than a brush group having a large protrusion margin, and a brush due to so-called waist bending of the brush group having a small protrusion margin on the carpet surface. There is less escape to the rear of the hair tip cut surface in the rotation direction, the effect of scraping up dust adhering to the carpet surface is improved, dust collection performance on the carpet is improved, and floor cleaning Also, by forming the brush group having a large protrusion margin to be soft, it is possible to maintain a soft feeling of cleaning the floor surface and efficiently clean each cleaning surface.

The invention according to claim 4 of the present invention is an agitator.
It is set so that the brush group with a small protrusion margin collides with the cleaning surface before the brush group with a large protrusion margin when the target rotates, and the brush group with a large protrusion margin is placed on the floor before the brush group with a small protrusion margin. When colliding with a surface, the brush group with a large protrusion amount escapes backward in the direction of rotation on the carpet, so the force of scraping dust at the tip of the brush by the brush group with a small protrusion amount located behind the rotation is reduced. I will let you. Therefore, the dust collection performance on the carpet is not reduced by colliding the brush group with a small protrusion amount with the brush group with a large protrusion amount on the cleaning surface before reducing the effect of scraping dust on the tips of the hair on the carpet. To achieve the improvement of.

The invention according to claim 5 of the present invention is an agitator.
It is set so that the brush group with a large protrusion margin collides with the cleaning surface before the brush group with a small protrusion margin when rotating the target. By positioning it, there is less escape to the rear in the rotational direction of the brush bristle tip cutting surface due to so-called waist bending of the brush group with a large protrusion margin on the floor surface, and it is effective to scrape dust adhering to the carpet surface This improves the dust collection performance on the floor surface.

According to a sixth aspect of the present invention, each brush group is made of a material having a different heat shrinkability, and heat treatment is performed after simultaneous cutting to the same length to form a brush group having a different protrusion margin. By setting the tip of the brush with a large protrusion margin to contact the floor surface and the tip of the brush with a small protrusion margin to contact the carpet, the bristle tips of the brush group with a small protrusion margin are set on the carpet. Since the cut end surface of the product collides with the carpet surface, by providing a brush group of a length suitable for carpet cleaning, the effect of scraping dust on the brush tips on the carpet is improved compared to the conventional method, and dust collection performance is improved. In addition to realizing the improvement of the above, and by simultaneously providing a brush group of a length suitable for cleaning the floor surface in one brush body, there is no increase in the cost of inserting the brush body into the rotor, etc. Efficiently cleans the cleaning surface of It is kill things.

According to the invention of claim 7 of the present invention, since the shape of the bristles of the brush body is spherical, an effect of scattering dust by the bristles can be added to improve the dust collecting performance.

The invention according to claim 8 of the present invention comprises an electric blower, and a suction port which is connected so as to communicate with the suction device for an electric vacuum cleaner according to any one of claims 1 to 5. It is a vacuum cleaner.

[0015]

EXAMPLE A first example of the present invention will be described below with reference to FIGS. 1, 2, and 3, the suction tool body 1
1 is composed of an upper frame body 12 and a lower frame body 13,
A dust collection chamber 14 is provided inside, and an opening 15 is provided in the lower frame 13 in the cleaning surface direction of the dust collection chamber 14. And, the pipe 16 is provided at the rear part of the suction tool,
A passage 18 for transmitting suction from the vacuum cleaner body 32 from the dust collection chamber 14 through the suction port 17 is provided inside. Further, an agitator 19 is provided in the dust collecting chamber 14, and the agitator 19 is a rotatable rotor 20.
And the groove portion 2 continuous in the longitudinal direction around the rotor 20.
1 is provided in plural, and the groove 21 is fitted with the protruding strip 22 and the brush body 23. The brush body 23
In the present invention, a raised cloth brush body made of fine pile cut-pile spun cloth is used, which is integrally formed of two types of brush groups having different protrusion margins, and the tip of the brush group 24 having a large protrusion margin. The length of the portion is set so as to be in contact with the floor surface 25, and the length of the tip portion of the protruding strip 22 and the tip portion of the brush group 26 having a small protrusion margin are set so as to be brought into contact with the carpet surface 27.

The operation and action of the above configuration are as follows. The agitator 19 is rotated by a drive source such as an electric motor (not shown) or an air turbine (not shown) using suction air. The tip of the brush group 24 with a large protrusion margin is set to abut on the floor surface 25, and the tip of the protruding band 22 and the brush group 26 with a small protrusion margin is set to abut on the carpet surface 27. When the agitator 19 rotates, the brush tip 24 of the brush group 24, which has a large protrusion margin, relatively moves on the floor surface 25 so as to push out the floor surface 25. Do the scraping. Further, on the carpet surface 27, the tip end portion of the protruding band 22 and the bristle tip cutting surface of the brush group 26 having a small protrusion allowance are relatively moved so as to separate the carpet surface 27, so that the carpet surface 27 is attached. You can scrape up the debris, and the floor surface 2
In both cases of 5 and the carpet surface 27, a brush group having an appropriate length is provided on one brush body at the same time, so that the cost of inserting the brush body into the rotor is not increased and the cost is not increased. It can efficiently clean all cleaning surfaces.

The second embodiment of the present invention will be described below with reference to FIG. Since the structure of the suction tool body 11 is the same as that of the first embodiment, its description is omitted. In FIG. 4, the brush body 23 has a configuration in which a brush group 24 having a large protrusion margin is sandwiched by brush groups 26 having the same protrusion length and
The tip portion of the brush group 24 with a large protrusion margin is set so as to abut on the floor surface 25, and the tip portion of the protruding band 22 and the tip portion of the brush group 26 with a small protrusion margin are carpet surface 27, as in the first embodiment.
Is set to abut.

The operation and action of the above configuration are as follows. The tip of the brush group 24 having a large protrusion margin is the floor surface 25.
Is set so that the tip end of the protruding band 22 and the tip end of the brush group 26 having a small protrusion margin sandwiching the brush group 24 having a large protrusion margin contact the carpet surface 27. At the time of rotation of the turret 19, the brush tip 24 of the brush group 24, which has a large protrusion margin, moves relatively to the floor surface 25 so that the dust surface adheres to the floor surface 25 by moving relatively. Do the scraping. In addition, the carpet surface 27
Also in the above, the tip end portion of the projecting strip 22 and the bristle tip cutting surface of the brush group 26 having a small protrusion margin move relative to each other so as to scratch the carpet surface 27. Further, on the carpet surface 27, a brush group 26 with a small protrusion margin is provided behind the brush group 24 with a large protrusion margin, and the brush group 24 with a large protrusion margin is rotated by the brush group 26 with a small protrusion margin. By sandwiching the brush group 24 with a large protrusion margin so that it is difficult to bend by sandwiching it between the front and back, it is possible to prevent the bristle breaking face of the brush group 24 with a large protrusion margin from escaping from the carpet surface 27 and adhere to the carpet surface 27. The effect of scraping up the waste is improved, and especially the dust collection performance on the carpet can be improved. Further, even on the floor surface 25, the brush group 24 having a large protrusion margin can be simply sandwiched between the brush group 26 having a large protrusion margin and the brush group 26 having a small protrusion margin in the front-rear direction of the rotation without changing the hardness of the brush bristles. Since the bending of the waist of the group 24 can be prevented, the dust collection performance can be improved even on the floor surface while maintaining the soft feeling of cleaning the floor surface. Therefore, the dust collection performance can be improved on each cleaning surface. Also, on the carpet, dust that is entangled in the pile of the carpet is removed from the pile of the carpet and dust is collected by the suction air, so the brush bristles are less likely to cause so-called waist breaks, for example, hard to increase the diameter of the pile. It is better to form it. On the other hand, on the floor surface, brush hair has a so-called soft feeling, for example, to reduce the pile diameter so as not to damage the wax on the floor and to strip off dust that is adsorbed lightly due to moisture etc. from the floor surface. It is better to make it soft. Therefore, as in the case of the third embodiment of the present invention, as compared with the brush group 24 having a large protrusion allowance, which is centered on the dust collection on the floor surface 25 that requires a soft feeling, the dust cover on the carpet surface 27 is the center of the protrusion allowance. By forming the small brush group 26 to be hard, the carpet surface 2
In FIG. 7, the brush group 26 having a small protrusion margin is less likely to escape rearward in the rotational direction of the brush bristle tip cutting surface due to so-called waist bending, and the effect of scraping dust adhering to the carpet surface 27 is improved, and the carpet is improved. In addition to improving the dust collection performance above, by forming the brush group 24 with a large protrusion amount even when cleaning the floor surface to be soft, it is possible to maintain the soft feeling of cleaning the floor surface. It can be cleaned efficiently.

The fourth embodiment of the present invention will be described below with reference to FIG. Since the structure of the suction tool body 11 is the same as that of the first embodiment, its description is omitted. Referring to FIG. 5, in a brush body composed of two types of brush groups having different protrusion margins, the brush group 26 having a small protrusion margin is cleaned before the brush group 24 having a large protrusion margin when the agitator 19 rotates. It is set to collide with a surface.

The operation and action of the above configuration are as follows. When the brush group 24 with a large protrusion margin is made to collide with the carpet surface 27 before the brush group 26 with a small protrusion margin,
Since the brush group 24 with a large protrusion margin breaks back and escapes rearward in the rotation direction, the brush group 2 with a large protrusion margin that is broken between the brush groups 26 with a small protrusion margin located at the rear of the rotation.
4, the bristle-cutting surface of the brush group 26 having a small protrusion margin reduces the force of scraping dust adhering to the carpet surface 27. Therefore, by colliding the brush group 26 with a small protrusion margin with the cleaning surface before the brush group 24 with a large protrusion margin, it is possible to prevent a reduction in the effect of scraping dust on the tip of the bristle cut surface on the carpet, and to reduce the effect on the carpet. To improve the dust collection performance of the.

The fifth embodiment of the present invention will be described below with reference to FIG. Since the structure of the suction tool body 11 is the same as that of the first embodiment, its description is omitted. Referring to FIG. 6, in the brush body composed of two types of brush groups having different protrusion margins, the brush group 24 having a large protrusion margin is cleaned before the brush group 26 having a small protrusion margin when the agitator 19 rotates. It is set to collide with a surface.

The operation and action of the above configuration are as follows. The tip of the brush group 24 having a large protrusion margin is the floor surface 25.
The brush group 26 with a small protrusion margin is set to abut on the carpet surface 27, and when the agitator 19 rotates, the brush group 24 with a large protrusion margin on the floor surface 25 is rotated. The hair cutting surface moves relative to each other so as to push out the floor surface 25, thereby scraping up the dust adhering to the floor surface 24. By providing a brush group 26 with a small protrusion margin behind the brush group 24 with a large protrusion margin to make the brush group 24 with a large protrusion margin hard to bend, the bristle tips of the brush group 24 with a large protrusion margin due to waist bending. The cut surface can be prevented from escaping from the floor surface 25, and the floor surface 2
5. The effect of scraping up the dust adhering to the surface of 5 is improved, and especially the dust collecting performance on the floor surface can be improved.

The sixth embodiment of the present invention will be described below with reference to FIG. A group of brushes 24 with a large protrusion amount on the base cloth 28
The brush group using a pile material having a small heat-shrinking property equivalent to that of the brush group and the brush group using a pile material having a large heat-shrinking property corresponding to a small protruding amount 26 are integrally formed. After spinning, cut into the same length at the same time. Furthermore, by performing heat treatment such as leaving it in a high temperature tank for a certain period of time, the length of the brush group using a material with a large heat shrinkability becomes shorter than that of a brush group using a material with a low heat shrinkability. Therefore, it is possible to manufacture a brush body including a group of brushes having different protrusion margins. At the same time, as in the case of the seventh embodiment, the bristle tips of the brush body are melted and the tip shape is formed into a spherical shape 29 by heat treatment as shown in FIG. The obtained tapping effect can add an effect of raising dust.

The eighth embodiment of the present invention will be described below with reference to FIG. A dust chamber 30 for collecting dust inside and a mower
In the main body 32 of the electric vacuum cleaner equipped with the
3. An electric vacuum cleaner equipped with a connection port that is connected so as to communicate with the suction tool via the extension tube 34. In particular, it improves the dust collection performance on the carpet compared to the conventional vacuum cleaner, and efficiently cleans all cleaning surfaces. It can be cleaned.

[0025]

According to the invention described in claim 1 of the present invention,
A rotatable agitator is provided internally, the agitator is formed by a rotor and a brush body provided in the longitudinal direction around the rotor, and the brush body is formed by a group of brushes having different protrusion margins. It is configured so that the tip of the brush group with a large protrusion margin contacts the floor surface and the tip of the brush group with a small protrusion margin contacts the carpet, so that the agitator rotates on the floor surface. In this case, the brush tip cutting surface of the brush group with a large protrusion margin moves relative to the floor surface so as to scrape off dust adhering to the floor surface, and also the brush group with a small protrusion margin on the carpet surface. By moving the bristles cutting surface relative to each other so as to scrape the carpet surface, the dust adhering to the carpet surface can be scraped, and a brush group with a length suitable for both the floor surface and the carpet surface. Was installed on one brush at the same time More without also resulting cost of insertion steps increase in brush body in the rotor, in which all of the cleaning surface can be efficiently cleaned.

According to the second aspect of the present invention, the brush group having a large protrusion margin is sandwiched between the brush groups having a small protrusion margin, and the tip of the brush group having a large protrusion margin is the floor surface. , The tip of the brush group with a small protrusion margin is set so as to abut on the carpet, so that when the agitator rotates,
On the floor surface, the bristles cutting surface of the brush group with a large protrusion margin moves relatively so as to push out the floor surface to scrape off the dust adhering to the floor surface, and also the protrusion margin on the carpet surface. The tip cutting surface of the small brush group moves relatively so as to scratch the carpet surface. Further, on the carpet surface, a brush group with a large protrusion margin is provided behind the brush group with a small protrusion margin in the rotation direction, and a brush group with a large protrusion margin is sandwiched between the brush groups with a small protrusion margin in the front and rear in the rotation direction. And, it is possible to prevent the bristle cutting surface of the brush group with a large protrusion margin from escaping from the carpet surface due to the waist break,
Cleaning up the dirt on the carpet surface improves the effect,
In particular, the dust collection performance on the carpet can be improved, and even on the floor, a brush group with a large protrusion margin can be sandwiched in the front and rear direction of rotation by a brush group with a small protrusion margin without changing the hardness of the brush bristles. By doing so, it is possible to prevent the waist of the brush group with a large protrusion amount from being broken, and it is possible to improve the dust collection performance even on the floor surface while maintaining the soft feeling of floor cleaning, thus improving the dust collection performance on each cleaning surface. It can be realized.

According to the third aspect of the present invention, the brush group having a small protrusion margin is formed to be harder than the brush group having a large protrusion margin, and the so-called waist break of the brush group having a small protrusion margin on the carpet surface. This reduces the escape of the brush bristle tip cut surface to the rear in the rotational direction, improves the effect of scraping dust adhering to the carpet surface, and improves the dust collection performance on the carpet, as well as the floor surface. Also in cleaning, by forming the brush group having a large protrusion margin to be soft, it is possible to maintain a soft feeling of cleaning the floor surface and efficiently clean each cleaning surface.

According to the fourth aspect of the present invention, when the agitator is rotated, the brush group having a small protrusion margin is set to collide with the cleaning surface before the brush group having a large protrusion margin. When a brush group with a large protrusion margin collides with the carpet first, the brush group with a large protrusion margin escapes backward in the direction of rotation on the carpet. It reduces the power to scrape dust at the tips of hair. Therefore, the dust collection performance on the carpet is not reduced by colliding the brush group with a small protrusion amount with the brush group with a large protrusion amount on the cleaning surface before reducing the effect of scraping dust on the tips of the hair on the carpet. To achieve the improvement of.

According to the fifth aspect of the present invention, when the agitator is rotated, the brush group having a large protrusion margin is set to collide with the cleaning surface before the brush group having a small protrusion margin. , A brush group with a large protrusion margin is made to collide with the cleaning surface before a brush group with a small protrusion margin.By providing a brush group with a small protrusion margin behind the brush group with a large protrusion margin in the direction of rotation, It is possible to prevent the bristles cut surface of the brush group with a large protrusion margin from escaping from the floor surface, improving the effect of scraping dust adhering to the floor surface, especially improving the dust collection performance on the floor surface Can be achieved.

According to the sixth aspect of the present invention, each brush group composed of materials having different heat shrinkability is cut at the same length at the same time and then heat-treated to obtain a brush group having a different protrusion margin. A brush body composed of the above can be manufactured. By setting the tip of the brush body with a large protrusion margin to contact the floor surface and the tip of the brush body with a small protrusion margin on the carpet, and providing a brush group of a length suitable for carpet cleaning, Compared with the above, the effect of scraping dust on the brush bristle tips on the carpet is improved and the dust collection performance is improved, and at the same time, a brush group of a length suitable for floor cleaning is also provided on one brush body. Thus, all cleaning surfaces can be efficiently cleaned without increasing costs such as an increase in the number of steps for inserting the brush body into the rotor.

According to the invention of claim 7 of the present invention, by making the bristle tip shape of the brush body spherical, it is possible to add the effect of scattering dust by the bristle tips and improve the dust collection performance. .

According to the invention of claim 8 of the present invention, a suction port which has a built-in electric blower and is connected so as to communicate with the suction tool for an electric vacuum cleaner according to any one of claims 1 to 7. It is an electric vacuum cleaner equipped with, which realizes an improvement in dust collection performance on a carpet in particular compared with the conventional vacuum cleaner, and can efficiently clean all cleaning surfaces.

[Brief description of drawings]

FIG. 1 is a side sectional view of a suction tool for an electric vacuum cleaner showing a first embodiment of the present invention.

FIG. 2 is a plan view of the suction tool for the electric vacuum cleaner.

FIG. 3 is a side sectional view of an agitator of the suction tool for the electric vacuum cleaner.

FIG. 4 is a side sectional view of an agitator of a vacuum cleaner suction tool according to a second embodiment of the present invention.

FIG. 5 is a side sectional view of an agitator of a vacuum cleaner suction tool showing a fourth embodiment of the present invention.

FIG. 6 is a side sectional view of an agitator of a vacuum cleaner suction tool according to a fifth embodiment of the present invention.

FIG. 7 is a side sectional view of the brush body of the suction tool for the electric vacuum cleaner showing the sixth embodiment of the present invention.

FIG. 8 is a side sectional view of an agitator of a vacuum cleaner suction tool according to a seventh embodiment of the present invention.

FIG. 9 is an overall view of an electric vacuum cleaner showing an eighth embodiment of the present invention.

FIG. 10 is a side sectional view of a conventional vacuum cleaner suction tool.

FIG. 11 is a side sectional view of an agitator of the suction tool for the electric vacuum cleaner.

FIG. 12 is a side sectional view of the suction tool for the electric vacuum cleaner when the agitator is rotated.

[Explanation of symbols]

11 Suction tool body 12 Upper frame 13 Lower frame 14 Dust collection chamber 15 openings 16 pipes 17 Suction port 18 passages 19 Agitator 20 rotor 21 groove 22 ridge 23 Brush body 24 Brushes with large protrusion margin 25 floor 26 Brushes with small protrusion margin 27 Carpet surface 28 Base cloth 29 Brushes with spherical bristles 30 dust chamber 31 motor 32 Vacuum cleaner body 33 hose 34 Extension tube

Continued front page    (72) Inventor Hideaki Sakitani             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. F-term (reference) 3B061 AA51 AD11

Claims (8)

[Claims] 1. A rotatable agitator is internally provided, and the agitator is formed by a rotor and a brush body provided in a longitudinal direction around the rotor, and the brush body is provided with a protrusion margin. Vacuum cleaner suction tool composed of different brush groups. 2. The suction tool for an electric vacuum cleaner according to claim 1, wherein a brush group having a large protrusion margin is sandwiched between brush groups having a small protrusion margin. 3. The suction tool for an electric vacuum cleaner according to claim 1, wherein the brush group having a small protrusion margin is made harder than the brush group having a large protrusion margin. 4. The electric vacuum cleaner according to claim 1, wherein when the agitator rotates, the brush group having a small protrusion margin is caused to collide with the cleaning surface before the brush group having a large protrusion margin. Suction tool. 5. The electric vacuum cleaner according to claim 1, wherein when the agitator rotates, the brush group having a large protrusion margin is caused to collide with the cleaning surface before the brush group having a small protrusion margin. Suction tool. 6. A brush group having different protrusion margins is formed by forming each brush group from materials having different heat-shrinkability, and performing heat treatment after simultaneously cutting to the same length. The suction tool for an electric vacuum cleaner according to any one of 5 above. 7. The suction tool for an electric vacuum cleaner according to claim 1, wherein the bristle tip of the brush has a spherical shape. 8. An electric vacuum cleaner having an electric blower therein and having a suction port connected so as to communicate with the suction tool for an electric vacuum cleaner according to any one of claims 1 to 7.