JPH02174823A - Vacuum cleaner suction equipment for floor cleaning - Google Patents

Abstract

PURPOSE:To control the rotation speed of a rotary brush corresponding tot the types of floors by detecting the reflection of light, that is emitted to the floor, by light receiving elements. CONSTITUTION:An oscillation circuit 5 drives a light emitting element 6, and the light emitted from the light emitting element 6 is reflected by a floor 7 and detected by light receiving elements 8 and 9. The outputs from the light receiving elements 8 and 9 are input to a differential amplifier 10, and further transmitted to the gate of a dual directional thyristor 12 through a level detector 11. By this constitution, mal-functioning due to difference in color can be prevented because the light reflected by the floor is detected by two light receiving elements 8 and 9, the difference between them is amplified, and only the change quantity of the light is detected, so that the same signal is generated even when the floor changes in color. For the circuit action, when the output from the differential amplifier 10 exceeds the reference voltage 20, the dual directional thyristor 12 is turned on so as to supply power to a motor 13. That is, a rotary brush is controlled in such a manner that when changes in the roughness of the floor become larger than a certain value, the rotary brush is turned on, and when it is smaller, the rotary brush turned off.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a floor suction tool for vacuum cleaners used in general households.

BACKGROUND ART A conventional technique will be explained below based on the drawings. tj
Figures r and s show the schematic structure of the vacuum cleaner. In the figure 1
is a vacuum cleaner main body, which is connected to a floor suction device 2 via a hose 3. The floor suction device 2 has a built-in electric motor and a rotating brush, and a switch is provided on the hand control section 4 at the tip of the hose 3, and the switch on the hand control section 4 is turned on.
Without turning it off, the power line of the electric motor built into the suction tool 2 is opened and closed from the vacuum cleaner body 1 through the hose 3, and the rotating brush driven by the electric motor is turned on and off.
The configuration was as follows.

Problems to be Solved by the Invention However, according to the above conventional configuration, the user has to turn the rotating brush on and off depending on the condition of the floor surface (carpet, floor, tatami, etc.), making it difficult to operate. It was very embarrassing. In addition, some users may clean the carpet without turning the rotating brush, and there is also the problem that the dust collection performance deteriorates depending on how it is used.

Furthermore, some of the hand-held controls had a function to change the vacuum cleaner's suction power and a display function, in addition to an "on" and "off" switch for the electric motor, making the operation complicated. . .

The present invention solves the above-mentioned conventional problems, and aims to improve operability by optimally controlling the number of circuits of the rotating brush of a floor suction tool depending on the floor surface.

Means for Solving the Problems In order to achieve the above object, the present invention provides a light emitting element and two or more sets of light receiving elements on the bottom surface of the main body of a floor suction device, and irradiates the light of the light emitting element onto the floor surface. A differential amplifier that detects the reflected light from two or more sets of light-receiving elements by two or more sets of light-receiving elements and outputs the difference between the signals from the two or more sets of light-receiving elements; This configuration includes a level detector that controls the power of the motor.

Effect According to the above configuration, the type of floor surface is detected from the unevenness of the floor surface by detecting the reflection of light irradiated on the floor surface via the light receiving element, and the rotating brush is rotated according to the floor surface. It controls the number.

Furthermore, by providing two or more sets of light receiving elements, it is possible to prevent malfunctions due to changes in the light receiving output depending on the color even on the same floor surface.

EXAMPLE Hereinafter, an example of the present invention will be described based on the drawings. Figure 1 shows the schematic structure of the floor suction device developed by Wooden Design. In the figure, 6 is an oscillation circuit that drives the light emitting element 6. The light emitting element 6 is reflected by the floor surface 7, and the light receiving element 8
, 9 (two sets of light receiving elements are used in the embodiment).

The outputs of the light receiving elements 8.9 are each input to a differential amplifier 10, which is further connected to the gate of a bidirectional thyristor 12 via a level detector 11. In addition, the electric motor 13
is connected in series with the bidirectional thyristor 12 to an AC power source. 14 indicates the bottom surface of the main body of the floor suction device.

FIG. 2 shows a specific embodiment of the control circuit of the present invention. In the figure, an oscillator 5 and a light emitting element 6 are connected in series to a DC power source, and a light receiving element 8.9 is also connected to a resistor 14.1.
It is connected to a DC power supply via 5. The output of the light receiving element is connected to a differential amplifier 16, the output of which is connected to an integrating circuit consisting of a resistor 17 and a capacitor 18, the output is connected to a non-inverting terminal of a comparator 19, and a reference voltage 2o is connected to an inverting terminal of the comparator 19. is connected. The output of the comparator 19 is connected to the gate of the bidirectional thyristor 12 and the resistor 21
It is pulled up to the DC power supply.

According to the above configuration, by detecting the light reflected from the floor surface with the two sets of light receiving elements 8.9 and amplifying the difference,
Even if the colors are different on the same floor, only the change in light is detected, so the same signal is generated and malfunctions due to color can be prevented. As for circuit operation, the output of the differential amplifier 10 is set to the reference voltage 2.
o, the bidirectional thyristor 12 turns on (the motor 1
It works so that the power is energized to 3. That is, the rotating brush is controlled so that when the change in the unevenness of the floor surface exceeds a certain value, the rotating brush is turned on, and when it is less than that, it is turned off.

Effects of the Invention As described above, according to the present invention, the condition of the floor surface, which is affected by the color of the floor surface, is detected with high accuracy, and the 0N10FF of the rotating brush is controlled according to the floor surface, thereby greatly improving usability. will be improved.

Furthermore, since the comparator circuit is simple, it can be made smaller and lighter.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a control circuit of a floor suction device according to an embodiment of the present invention, FIG. 2 is a specific circuit diagram of the same, and FIG. 3 is an external perspective view of a conventional vacuum cleaner. 6... Oscillator, 6... Light emitting element, 8,
9... Light receiving element, 10... Differential amplifier, 11... Level detector. Name of agent: Patent attorney Shigetaka Awano and one other person

Claims (1)

[Claims] A rotating brush driven by an electric motor, a floor suction tool main body having the rotating brush, a light emitting element and two or more sets of light receiving elements provided on the bottom of the floor suction tool main body, and a light emitting element provided to the floor surface from the light emitting element. The light reflected from the floor is
A vacuum cleaner equipped with a differential amplifier that detects with two or more sets of light receiving elements and outputs the difference between the signals from the two or more sets of light receiving elements, and a level detector that controls the electric power of a motor using the output of this differential amplifier. Suction device for the floor of the machine.