JPH0363894B2 - - Google Patents

Description

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

BACKGROUND ART Conventionally, in this kind of floor nozzle, the rotary brush was rotated or stopped depending on the type of surface to be cleaned, and the specific means for switching was mostly manual control.

Problems to be Solved by the Invention However, with this conventional system, the user had to operate the changeover lever or switch depending on the floor surface, making the operation complicated.

The present invention has been made in view of the above-mentioned drawbacks, and is capable of automatically controlling the drive and stop of the rotating brush according to the condition of the floor surface (sitting or folding, etc.). .

Means for Solving the Problems In order to solve the above problems, the floor nozzle for a vacuum cleaner of the present invention includes a floor nozzle body, a rotating brush for scraping up dirt on the floor, and an ultrasonic transceiver for transmitting and receiving ultrasonic waves. , a comparator that compares the received level of ultrasonic waves with a predetermined value and outputs a signal to drive or stop the rotating brush, and automatically determines the state of the floor surface and controls the rotating brush.

Function In the above configuration, since the reflectance of ultrasonic waves differs depending on whether the floor surface is flat or folded, the rotating brush is automatically controlled depending on the reception level of the ultrasonic waves, and the It can be used.

Embodiment The embodiment will be described below with reference to FIGS. 1 to 3. In the figure, 1 is the floor nozzle body;
It is connected to the suction side of a vacuum cleaner 3 via a hose 2 or the like, and has an ultrasonic transmitter/receiver 4, a rotating brush 5, and a driving motor 6 inside. Reference numeral 7 denotes a control means that drives the ultrasonic transmitter 8 included in the ultrasonic transmitter/receiver 4 to emit ultrasonic waves toward the floor surface. Reference numeral 9 denotes an ultrasonic receiver that receives ultrasonic waves emitted from the ultrasonic transmitter 8 and reflected from the floor surface.
Reference numeral 10 compares the reception level of the ultrasonic waves received by the ultrasonic receiver 9 with a predetermined value, and outputs a signal to drive or stop the motor 6 depending on whether the level is less than the predetermined value, and drives the rotating brush 5. It is a controlled comparison means.

Next, the operation of this embodiment will be described. When the user cleans, the control means 7 operates the ultrasonic transmitter 8 in the floor nozzle body 1 to emit ultrasonic waves toward the floor surface. The emitted ultrasonic waves are reflected by the floor surface and received by the ultrasonic receiver 9, and the reception level varies depending on the condition of the floor surface, as shown in FIG. 3. In FIG. 3, a shows the case where the floor surface is a tatami mat, and b shows the case where the floor surface is a carpet. The reception level for tatami mats is much higher than that for tatami mats (V ₁ > V ₂ ). This is because ultrasonic waves are absorbed by carpets and are difficult to reflect. If the reception level of the received ultrasonic waves is below a predetermined value, the comparing means 10 determines that the carpet is wet and operates the motor 6 to move the rotary brush 5, and if it is above the predetermined value, the folding is performed. It is determined that there is, and the rotating brush 5 is not operated.

Therefore, it is possible to automatically distinguish between rugs and folding clothes and perform cleaning accordingly.

Effects of the Invention As described above, according to the present invention, in order to judge whether the floor surface is flat or folded based on the received level of reflected ultrasonic waves, the rotating brush is automatically controlled. You can perform cleaning according to the floor surface.

[Brief explanation of drawings]

Fig. 1 is a plan view of an embodiment of the present invention showing the interior of the floor nozzle body in cross section, Fig. 2 is a perspective view of the vacuum cleaner, and Figs. 3 a and b are reception of reflected ultrasonic waves. It is a diagram showing levels. 1... Floor nozzle body, 4... Ultrasonic transmitter/receiver,
5... Rotating brush, 6... Motor, 10... Comparison means.

Claims (1)

[Claims] 1. A floor nozzle body, a rotating brush installed inside the floor nozzle body to scrape up dirt on the floor surface, an ultrasonic transmitter/receiver that transmits ultrasonic waves to the floor surface and receives reflected ultrasonic waves, and an ultrasonic wave generator. A floor nozzle for a vacuum cleaner, comprising comparison means for comparing a reception level of the rotating brush with a predetermined value and outputting a signal for driving or stopping the rotating brush.