JPH0670869A - Vacuum cleaner suction tool - Google Patents

Abstract

(57) [Summary] [Purpose] It is an object of the present invention to provide a suction tool for an electric vacuum cleaner that can reduce frictional resistance even when cleaning a carpet, and that provides smooth running performance. [Constitution] A napped cloth 19 formed of a cut pile spun cloth made of fine fibers is wound around the pipe 18. Holders 20 are fixed to both end surfaces of the pipe 18. And the shaft 2 fixed to this holder-20
A bearing 23 is rotatably fitted to the shaft 2. The holder 20 and the bearing 23 on one side of the pipe 1 are provided with a convex portion 24.
The thrust direction of 8 is fixed. The other holder-20
A coil spring 25 is mounted between the bearing and the bearing 23,
The bearing 23 is held by a claw 26 formed on the holder-20. The length B of the coil spring 25 is A> B with respect to the distance A between the holder 20 and the bearing 23. The bearing 23 is arranged so that it can move in the direction in which the coil spring 25 is compressed and that it can be returned to its original position by the elastic force of the coil spring 25.

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 an electric vacuum cleaner used at home.

[0002]

2. Description of the Related Art Conventionally, a suction tool for an electric vacuum cleaner of this type is
As shown in FIGS. 4 and 5. That is, the suction tool body 1 is formed by the upper case 2 and the lower case 3,
A suction port 4 is formed in the lower case 3 and a small front roller 5 and a rear roller 5 are provided for running the suction tool body 1.
6 were provided at the front and back respectively. Further, the gap A between the lower surface 7 around the suction port 4 of the lower case 3 and the floor surface increases the suction force with respect to the floor surface, and the flow velocity of the airflow flowing through the gap A is increased to be strong. To suck in the dust, the gap cannot be made large, and on the contrary, if it is made too small, there will be problems such as hard dust getting caught in this gap and damaging the floor surface.
It was set to have a size of about 0.5 to 2 mm. Therefore, in order to further increase the suction force, a lip-shaped strip 8 formed of a soft material is provided immediately behind the suction port 4 in a shape closer to the lateral width of the suction tool body 1.

[0003]

However, in the case of such a structure, when suction force is applied to the suction tool body 1, especially on a carpet, the front roller 5 is attracted by the suction force.
The rear roller 6 is buried in the carpet, and the lower surface portion 7 of the lower case 3 is pressed onto the carpet. Also,
At the same time, the lip-shaped strip 8 is similarly pressed onto the carpet. As a result, the lower surface portion 7 of the lower case 3
The frictional resistance between the whole and the carpet increased, and the operation resistance of the suction tool body 1 became very heavy, which made it inconvenient to use. Therefore, the present invention solves the above problems and provides a more convenient suction tool for an electric vacuum cleaner.

[0004]

In order to achieve the above object, the present invention provides a first means in which a rear part of a lower case is
A wide rotating roller body is rotatably provided, and this rotating roller body winds a tire formed of a cut pile spun cloth formed of fine fibers on the outside of a cylindrical pipe. A holder is fixed to both end faces of the pipe, and a bearing is rotatably disposed on the holder. One holder and the bearing are fixed in the thrust direction of the pipe, and the other holder- A coil spring shorter than the distance between the holder and the bearing is provided between the bearing and the bearing, and the bearing can be moved toward the holder in the direction of further compressing the coil spring, and the elastic force of the coil spring returns to the original position. It is arranged so that it can be returned to
This is a structure in which the bearing of the rack is detachably attached to the lower case.

[0005]

When a suction force is applied to the suction tool body as in the above-mentioned means, a wide rotating roller body is provided at the rear portion of the lower case on the carpet, so that the pressure receiving area is large. Due to the suction force, the rotary roller body is less likely to be buried in the carpet, so that the lower surface of the lower case is not pressed against the carpet. Also, since the rotating roller body that receives pressure rotates as the suction tool body travels, the friction resistance between the entire lower surface of the lower case and the carpet does not increase, and the operation resistance of the suction tool body does not increase. , Even if a suction force is applied, it does not change much. Also, by fixing one holder of the rotary roller body and the bearing in the thrust direction, it is possible to prevent movement to one side even if friction resistance from the carpet is received, so smooth running performance can be obtained. It is what is done.

In addition, even if hair or the like is entangled with the surface of the cut pile spun cloth formed of fine fibers, the spinning roll
Since the roller body is detachably provided from the lower surface side of the lower case, the rotary roller body can be easily cleaned by removing it from the lower case.

As described above, it is possible to provide a suction tool for an electric vacuum cleaner which is easy to use.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIG.
A description will be given with reference to a few items. The suction tool main body 11 is composed of an upper case 12 and a lower case 13. A suction port 15 is formed on a lower surface 14 of the lower case 13 and a front portion of the lower case 13 is provided for traveling. A pair of rollers-1
6 is provided, and a rotating roller body 17 is provided at the rear portion.

The rotary roller body 17 is constructed as shown in FIGS. That is, a raised cloth 19 made of a cut pile spun cloth made of fine fibers is wound around the outside of the pipe 18. Holders 20 are fixed to both end surfaces of the pipe 18. A bearing 23 is rotatably fitted on the shaft 22 fixed to the holder 20. This one holder-20 and bearing 23
Is provided with a convex portion 24 to fix the thrust direction of the pipe 18. A coil spring 25 is mounted between the other holder 20 and the bearing 23, and the bearing 23 is held by a claw 26 formed on the holder 20. For the distance A between the holder 20 and the bearing 23, the length B of the coil spring 25 is A
> B. The bearing 23 is arranged so that it can move in the direction in which the coil spring 25 is compressed and that it can be returned to its original position by the elastic force of the coil spring 25. The bearing 23 is fitted in a bearing hole 27 formed in the lower case 13, and when the tire 19 portion of the rotary roller body 17 is moved in the thrust direction, one of them is a coil spring 25. Moves in the direction of compression, and the other moves the bearing 22 out of the bearing hole 27 by the amount of the movement, and the rotary roller body 17 is moved to the lower case 13.
It will be removed from the. Further, when the bearing is inserted, it can be easily attached by pushing the bearing 22 toward the thrust side and contracting it.

According to the present invention, the suction tool body 11 has the above structure.
When a suction force is applied to the carpet, the lower case
Since a wide rotary roller body 17 is provided at the rear portion of the space 13, the pressure receiving area is large and the rotary roller body is attracted by the suction force.
It is difficult for the body 17 to be buried in the carpet, so that the lower surface 14 of the lower case 13 is not pressed against the carpet. In addition, the rotary roller body 1 receiving pressure.
Since 7 rotates as the suction tool body 11 travels, the frictional resistance between the entire lower surface 14 of the lower case 13 and the carpet does not rise, and the operation resistance of the suction tool body 11 is even if a suction force is applied. It doesn't change much.

Further, by fixing one holder 21 of the rotary roller body 17 and the bearing 23 in the thrust direction, it is possible to prevent the carpet from moving to one side even if it receives frictional resistance from the carpet, so that it is smooth. It is possible to obtain excellent running performance. Further, since the length B of the coil spring 25 is A> B with respect to the distance A between the holder 20 and the bearing 23, the holder-
The bearing 23 does not come into contact with the claw 26 of the rotary roller body 1.
Even if 7 rotates, the pawl 26 does not wear. In addition, even if hair or the like is entangled on the surface of the cut pile-shaped spun cloth formed of fine fibers, the rotary roller body 17 is attached to the lower case.
Since it is detachably attached to the lower surface 14 of the sleeve 13, it can be easily removed and maintained.

[0012]

According to the present invention, since the rotary roller body having a wide width is provided on the carpet, the pressure receiving area is large and the rotary roller body is not easily buried in the carpet due to the suction force. Furthermore, since the rotating roller body that receives pressure rotates as the suction tool body travels, the frictional resistance between the entire lower surface of the lower case and the carpet does not increase, and the suction tool body is operated. The resistance does not change much even when a suction force is applied. Also, by fixing one holder of the rotary roller body and the bearing in the thrust direction, it is possible to prevent movement to one side even if friction resistance from the carpet is received, so smooth running performance can be obtained. It is what is done. In addition, since the length B of the coil spring is A> B with respect to the distance A between the holder and the bearing, the bearing does not come into contact with the claw of the holder and the claw remains even if the rotating roller body rotates. Durability is improved without wear.

Further, even if hair or the like is entangled on the surface of the cut pile-shaped spun cloth formed of fine fibers, the rotation roll
Since the roller body is detachably provided on the lower surface of the lower case, the rotating roller body can be easily removed from the lower case for easy maintenance.

As described above, the suction tool for the electric vacuum cleaner, which is easy to use, can be provided.

[Brief description of drawings]

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

FIG. 2 is a perspective view of the rotary roller body.

FIG. 3 is a sectional view of the rotary roller body.

FIG. 4 is a central sectional view of a suction tool for an electric vacuum cleaner showing a conventional example.

FIG. 5 is a perspective view of the same.

[Explanation of symbols]

 11 Suction Tool Main Body 12 Upper Case 13 Lower Case 15 Suction Port 17 Rotating Roller Body 18 Pipe 19 Raised Cloth 20 Holder 22 Shaft 23 Bearing 24 Convex 25 Coil Spring 26 Claw

Claims (1)

[Claims] 1. An upper case and a lower case,
A suction port is formed on the lower surface of the lower case and the lower case is
A wide rotating roller body is rotatably provided at the rear portion of the cloth, and this rotating roller body is a cut pile spun cloth formed of fine fibers on the outer side of a cylindrical pipe. Wrap the formed napped cloth and attach it to the holder on both end faces of the pipe.
The bearing is rotatably arranged in this holder, one holder and the bearing are fixed in the thrust direction of the pipe, and the holder and the bearing are placed between the other holder and the bearing. A coil spring shorter than the distance between the bearing and the bearing is arranged so that the bearing can be moved toward the holder side in the direction of further compressing the coil spring and can be returned to the original position by the elastic force of the coil spring. Suction tool for electric vacuum cleaner in which the bearing of the rack is detachably attached to the lower case.