JPS60126133A - Floor nozzle of electric cleaner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a floor nozzle for a vacuum cleaner with rotating brushes.

Structure of a conventional example and its problems Fig. 1 shows a conventional example of this type of floor nozzle for a vacuum cleaner. A suction chamber 3 is provided at the front, and a turbine chamber 6 containing an air turbine 4 is formed at the rear.

When you run a vacuum cleaner, its suction power moves from suction chamber 3 to ventilation chamber 6.
→The air flows into the turbine chamber 5 and the air turbine 4 rotates. This rotation is then transmitted to the rotating brush 2 via a power transmission means such as a belt.

By the way, in the case of such a floor nozzle, the rotational force of the rotating brush 2 is generated by the air flowing in due to suction rotating the air turbine 4. Therefore, when the amount of air flowing in decreases, the air flowing into the air turbine 4 is The flow velocity of the rotating brush 2 decreases, and the output of the rotating brush 2 also decreases. Conversely, when the amount of inflow increases, the output of the rotating brush 2 increases.

7 In this way, the output of the rotating brush 2 changes depending on the amount of suction air flowing in. This means that the dust collection performance of this type of floor nozzle tends to change depending on the amount of suction air. If the surface has good adsorption properties, the amount of suction air will decrease due to adsorption, and performance will deteriorate; if the surface has less adsorption properties, the amount of suction air will increase and the output will become too high, causing damage to the bearings of the rotating brush 2. This caused a decrease in the durability of parts, etc.

OBJECTS OF THE INVENTION The present invention eliminates these conventional drawbacks, and aims to reduce fluctuations in the output of the rotating brush, improve durability of bearings, etc., and stabilize dust collection performance.

Structure of the Invention The floor nozzle of the present invention is characterized in that the opening area of the vent between the suction chamber containing the rotating brush and the turbine chamber containing the air turbine is varied according to the amount of suction air. This stabilizes the output, provides stable dust collection performance, and improves the durability of the rotating parts.

Description of examples Hereinafter, an embodiment thereof will be described with reference to the accompanying drawings.

In FIGS. 2 and 3, 7 connects the upper and lower body members 8.9 to the bumper 10f! The floor nozzle body is obtained by connecting via C, and in front of it is a suction chamber 12 containing a rotating brush 11.
Behind it is a turbine chamber 1 containing an air turbine 13.
4 are formed respectively. Reference numeral 15 denotes a substantially semi-cylindrical connection case, which forms the rear portion of the turbine chamber 1-4 and is connected to the upper and lower main body members 8.9 so as to be able to rise and fall freely. A connecting pipe 16 is rotatably connected to the opening of the connecting case 15, and is connected to the suction side of the vacuum cleaner.

Reference numeral 17 denotes a vent provided on one side of the partition wall between the suction chamber 12 and the turbine chamber 14.

The air vent 17 is provided with a wind pressure plate 20 whose upper portion is pivoted to a fulcrum shaft 19 in a J-shape.

In the above configuration, when the vacuum cleaner is operated now, the suction air flows from the suction chamber 12 to the ventilation chamber 17 to the turbine chamber 14, thereby rotating the air turbine 13 in the turbine chamber 14. The rotation is transmitted to the rotating brush 11 by the belt 21. Then, the rotation of the rotary brush 11 scrapes up dust from the surface to be cleaned, such as a carpet, and collects the dust.

By the way, as shown in FIG. 4, when the volume of the suction air a decreases due to reasons such as adsorption to the carpet, the wind pressure plate 20 closes the vent 17 due to its own weight or the urging force of a spring.
Narrow down the aperture area. Therefore, the flow velocity of the suction air a increases, and the rotational speed of the air turbine 13 is maintained at a constant value.

Conversely, as shown in FIG. 6, when the volume of the suction air a increases, the wind pressure of the suction air a causes the wind pressure plate 20 to open. Therefore, the opening area of the vent 17 increases, the flow velocity of the suction air a decreases, and the rotational speed of the air turbine 13 is prevented from increasing.

In this way, the function of the wind pressure plate 20 makes it possible to obtain a stable rotational speed of the air turbine 13 that is not affected by changes in the amount of suction air, resulting in stable dust collection performance and improved durability of rotating parts, etc. It is something that can be done.

Note that the same effect can be obtained by using a wind pressure plate 22 made of an elastic material such as rubber as shown in FIG.

Effects of the Invention As described above, according to the present invention, it is possible to always maintain a stable rotational speed of the air turbine even when the amount of suction air changes, and to improve stable dust collection performance and the durability of rotating parts, etc. It is possible.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a conventional floor nozzle, Fig. 2 is a sectional view of a floor nozzle according to an embodiment of the present invention, Fig. 3 is a perspective view of the vent section, and Fig. 4 is an operation when the amount of suction air decreases. An explanatory diagram, FIG. 5 is an explanatory diagram of the operation when the amount of suction air is increased, and FIG. 6 is a sectional view of the floor nozzle in another embodiment. 7... Floor nozzle body, 11... Rotating brush, 13... Air turbine, 20.22...
...Valve body (wind pressure plate). Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 5 Figure 3 Figure 4 Figure 3

Claims (2)

[Claims] (1) An electric cleaner with a rotary brush metal driven by an air turbine installed in the floor nozzle body, and a valve body that changes the opening area depending on the wind pressure in the vent facing the air turbine. Machine floor nozzle. (2) A floor nozzle for a vacuum cleaner according to claim 1, wherein a valve body is pivotally supported at the upper end of the vent, and the axis of the valve body is located above the rotation center of the air turbine. .