JPH0755213B2 - Floor nozzle for vacuum cleaner - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor nozzle for an electric vacuum cleaner having an agitator mainly for carpet cleaning.

[0002]

2. Description of the Related Art A conventional floor nozzle for an electric vacuum cleaner will be described below. As shown in FIG. 4, an agitator 17 and its drive source are internally provided in the floor nozzle main body 16, and the front and rear positions of the agitator 17 are rotatably supported by lower members of the main body and have an outer diameter dimension. Two small front rollers 18 and two rear rollers 19 having a large outer diameter are provided.
Can run on the surface to be cleaned.

[0003]

However, in the above-mentioned conventional structure, when traveling on a carpet, the front roller having a smaller outer diameter has a smaller ground contact area than the rear roller having a larger outer diameter. Since it sinks more into the carpet than the rear roller, the front part of the floor nozzle body is stuck to the carpet during forward movement, resulting in poor operability.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a floor nozzle for an electric vacuum cleaner having excellent operability.

[0005]

To achieve this object, a floor nozzle for an electric vacuum cleaner according to the present invention is rotatably supported by a shaft near both ends of an agitator rotated by a drive source. It has a configuration including a roller and a rear roller having an outer diameter smaller than that of the front roller.

[0006]

With this construction, the ground contact area of the front roller when traveling on the carpet is made larger than the ground contact area of the rear roller.

[0007]

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

As shown in FIGS. 1 to 3, the floor nozzle main body 1 is constructed by connecting an upper member 3 and a lower member 4 of the main body via a bumper 2, and a lower part is provided in the front inside thereof. A suction chamber 6 whose opening is a suction port 5 is formed.

At the center of the suction chamber 6, there is provided a communication pipe 7 which is clamped between the upper member 3 and the lower member 4 of the main body behind the floor nozzle main body 1. The communication pipe 7 is rotatably connected to the communication pipe 7. To the connected connecting pipe 8.

An extension pipe, which is connected to the suction side of the electric vacuum cleaner via a hose, is detachably connected to the connection pipe 8.

A motor for driving an agitator and a control unit for controlling the motor are internally provided on the left and right of the connecting pipe 8, and power is supplied by a power cord.

An agitator 9 rotatably held by bearings provided on both side walls of the suction chamber 6 and provided in parallel with the suction chamber 6 includes a substantially cylindrical rotor 10 and an outer peripheral surface of the rotor 10. Is formed by an agitator body 11 made of a flexible material, which is continuously mounted in the longitudinal spiral direction.

The outer diameters of the front rollers 12 and 13 are the same as those of the agitator 1.
The outer diameter of the agitator 9 is substantially the same as the maximum outer diameter of the agitator 1 and is rotatably disposed near both ends of the agitator 9.

The rear rollers 14 and 15 are rotatably supported by the lower member 4 of the main body, and have an outer diameter dimension of the front rollers 12 and 15.
It is smaller than the outer diameter dimension of 13.

The operation of the vacuum cleaner floor nozzle constructed as described above will be described below.

When the motor is operated, the agitator 9 is repeatedly rotated in the order of upward → forward → downward → backward → upper, and the repelling action of the agitator and the suction force of the electric vacuum cleaner cause dust from the surface to be cleaned such as a carpet. The dust inside the rug is released and absorbed, and the dust inside the rug is sucked out.

When the front rollers 12, 13 having a large outer diameter size and the rear rollers 14, 15 having a small outer diameter size travel on the carpet, the front rollers 12, 13 are rear rollers 14, 1.
Since the ground contact area is larger than that of No. 5, it floats above the rear rollers 14, 15 above the carpet.

As described above, according to this embodiment, by providing the floor nozzle with the front roller and the rear roller having an outer diameter smaller than that of the front roller, when traveling on the carpet,
Since the front roller has a larger ground contact area than the rear roller, it floats above the carpet above the rear roller, and as a result, the front part floats above the carpet when the floor nozzle body moves forward, and moves lightly without catching on the carpet. It is possible to improve operability.

[0019]

As is apparent from the above description of the embodiments, the present invention provides a front roller rotatably supported by a shaft in the vicinity of both ends of an agitator rotated by a drive source, and the front roller. With the configuration including the rear roller having a smaller outer diameter, it is possible to realize the floor nozzle for the electric vacuum cleaner, which is capable of lightly advancing the floor nozzle body and has excellent operability.

[Brief description of drawings]

FIG. 1 is a sectional view showing a configuration of a floor nozzle for an electric vacuum cleaner according to an embodiment of the present invention.

FIG. 2 is a plan view of the same.

[Figure 3] Bottom view of the same

FIG. 4 is a sectional view showing a configuration of a conventional floor nozzle for an electric vacuum cleaner.

[Explanation of symbols]

 1 ... Floor nozzle body 9 ... Agitator 12, 13 ... Front roller 14, 15 ... Rear roller

Claims (1)

[Claims] 1. An agitator installed in a floor nozzle body and rotated by a drive source, a front roller rotatably supported by a shaft near both ends of the agitator, and an outer diameter dimension of the front roller. Floor nozzle for vacuum cleaner with a rear roller of smaller outer diameter.