JPH0613014B2 - Floor nozzle for vacuum cleaner - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to floor nozzles for vacuum cleaners.

2. Description of the Related Art Conventionally, as shown in FIG.
A front roller 51 and a rear roller 52 are provided, and the surface to be cleaned 53 and the floor nozzle bottom surface 5 are formed by these rollers 51 and 52.
There is a relationship in which a clearance T with respect to 0 is formed, and when the clearance T becomes smaller, the deep part suction performance is improved.

However, when the gap T is made smaller, the suction sound flowing through the gap T becomes a high frequency, and there is a drawback that it becomes very audible at a peak of about 1000 Hz.

The present invention has solved such conventional problems,
The floor nozzle improves suction performance and provides a quiet floor nozzle.

Means for Solving the Problems In order to solve such conventional problems, the present invention provides a nozzle having a suction chamber having a lower opening as a suction port and a suction passage communicating with a part of the suction chamber and extending rearward. This floor is provided with a main body, a floor nozzle bottom surface located in the vicinity of the suction port, and a pair of front and rear wheels that support the nozzle body so that the floor nozzle bottom surface is spaced from the surface to be cleaned. A plurality of concave and convex portions are formed on the outer peripheral portion of the bottom surface of the nozzle.

By the plurality of uneven portions, the air passage between the floor nozzle bottom surface and the surface to be cleaned has a shape in which the cross-sectional area changes in size.
A difference in flow velocity is generated in the flowing air flow. As a result, the air flow generates turbulence and suppresses air vibration.

Example Hereinafter, the example will be described with reference to the accompanying drawings.

1 to 4, the floor nozzle body 1 is a bumper 2
It is obtained by connecting the upper and lower body members 3 and 4 with each other, and a suction chamber 6 having a lower opening as a suction port 5 is formed in the front inside thereof.

The center of the suction chamber 6 extends to the rear of the nozzle body 1 and is connected to a suction passage 7 whose upper and lower walls are arcuate. Further, inside the nozzle body 1 located behind the suction chamber 6, there are provided chambers 8 and 9 partitioned by the suction passage 7 into the left and right, and some of the chambers 8 have a small motor for driving an agitator. 10 is the control unit 1 in the other room 9.
1 is installed internally. 12 and 13 are rooms 8 and 9
It is a vent for allowing cooling air to flow therein, and is covered with filter materials 14 and 15 for preventing dust from entering.

Reference numeral 16 is an agitator provided in the suction chamber 6 in parallel therewith, and 17 is a bearing of the agitator 16 disposed on both side chamber walls of the suction chamber 6. Shaft 1 of the agitator 16
Reference numeral 8 projects further to the side than the bearing 17, and an auxiliary agitator 19 is attached thereto. The auxiliary agitator 19 faces the opening 20 formed in the side wall of the nozzle body 1.

A belt 23 is stretched between a pulley 21 provided on one side of the agitator 16 and a pulley 22 provided on the shaft of the motor 10. That is, the agitator 1
6. The auxiliary agitator 19 is forcibly driven by the motor 10.

24 is a fixed brush attached in parallel to the rear of the suction port 5, 2
Reference numerals 5 and 26 are wheels provided in front of and behind the nozzle body 1 so that the suction port 5 is located at a constant distance from the non-cleaning surface.

Reference numeral 27 is a brush cover located above the agitator 16 and held by the lower body 4 by a buckle 28.

Reference numeral 29 denotes a floor nozzle bottom surface located in the peripheral portion of the suction port 5. The outer peripheral portion 30 of the floor nozzle bottom surface 29 has a plurality of uneven portions 31 in the width direction.

The concavo-convex portion 31 has a width position equal to or larger than the width dimension S of the suction passage 7.

The air sucked from the air passage 32 formed by the outer peripheral portion 30 of the floor nozzle bottom surface 29 and the surface to be cleaned passes through the suction port 5, the suction chamber 6, and the suction passage 7 and is sucked into the cleaner body. The air flowing through the air passage 32 causes a flow velocity difference due to the difference in passage cross-sectional area due to the uneven portion 31, resulting in turbulent flow and suppressing the generation of sound due to air vibration.

Here, in this example, the uneven portion 31 was arranged on the outer peripheral portion of the front bottom surface of the floor nozzle, but this position showed the best effect.

As described above, according to the present invention, the suction chamber having the lower opening as the suction port, the nozzle main body having the suction passage communicating with a part of the suction chamber and extending rearward, and the floor located in the periphery of the suction port. It is equipped with a bottom surface of the nozzle and a pair of front and rear wheels that support the nozzle main body so that the bottom surface of the floor nozzle is located at a distance from the surface to be cleaned. As a result, the air flowing through the air passage causes a flow velocity difference due to the difference in passage cross-sectional area due to the uneven portion, resulting in turbulent flow. As a result, it is possible to prevent the generation of high-frequency sound due to air vibration, and to reduce the noise of the nozzle.

[Brief description of drawings]

FIG. 1 is a bottom view of a floor nozzle showing an embodiment of the present invention, FIG.
The figure is a plan view showing a configuration in which the upper body and the brush cover are removed, FIG. 3 is a plan view of a floor nozzle, and FIG. 4 is a sectional view.
FIG. 5 is a sectional view showing a conventional floor nozzle. 1 ... Nozzle body, 5 ... Suction port, 6 ... Suction chamber, 7 ...
... Suction passage, 29 ... floor nozzle bottom surface, 30 ... floor nozzle bottom surface outer peripheral portion, 31 ... uneven portion, 32 ... air passage.

Claims (1)

[Claims] 1. A nozzle body having a suction chamber having a lower opening as a suction port, a suction passage communicating with a part of the suction chamber and extending rearward, a floor nozzle bottom face located in the periphery of the suction port, An electric cleaning system having a pair of front and rear wheels for supporting the nozzle body so that the bottom surface of the floor nozzle is located at a distance from the surface to be cleaned, and a plurality of uneven portions are formed on the outer peripheral portion of the bottom surface of the floor nozzle. Floor nozzle for machine.