JPH06169872A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To provide a vacuum cleaner of high safety ensuring freedom from a danger, even if a rotating brush is carelessly touched at the time of stopping a cleaning work without turning off a switch. CONSTITUTION:This vacuum cleaner has a floor brush 7 fitted with a vibration detecting means 13 to detect a vibration due to friction with the irregularities of the surface of a cleaning object or the surface of the body, and a mounting and demounting state detecting means 15 to detect whether the brush 7 is lifted. The means 13 is constituted of a piezoelectric element 18, a vibration actuator 19 and a vibration spring 20. Also, the means 15 is constituted of a micro switch and an actuator for causing a mounting and demounting motion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vacuum cleaner, and more particularly to operation control of an electric blower and a rotary brush driving electric motor.

[0002]

2. Description of the Related Art Conventionally, there has been well known a vacuum cleaner in which a rotating brush is rotated by incorporating an electric motor inside a suction port.
Especially recently, avoiding the danger of touching the rotating brush during high-speed rotation, preventing damage to the floor surface due to rotation of the rotating brush with the suction port moving stopped, and suctioning from the viewpoint of energy saving. There is one that stops a rotating brush driving electric motor (hereinafter referred to as an electric motor) when the mouth is not moved and when the suction opening is turned upside down.

The former one (hereinafter referred to as the first embodiment) has a free wheel that is rotated by a frictional force with the floor when the suction port is moved back and forth on the floor, and that the rotation is stopped. There are some which detect and stop the electric motor.

As the latter (hereinafter referred to as the second embodiment), a switch which is turned on and off by a moving body is provided in the suction port, and this switch is turned on when the suction port is in use, and the suction port is turned over. There is a device that controls the operation of the electric motor in the suction port when it is turned off.

Further, as a device for controlling the rotational speed of the rotary brush and the electric blower input (hereinafter referred to as the third embodiment),
It is known that a change in suction pressure is detected by a pressure sensor and a change in current consumption of a rotating brush driving electric motor is detected by a current sensor.

[0006]

In the first embodiment described above, the electric motor stops without fail when the operation of the suction port is stopped or when the suction port is lifted, but it is free even when the suction port is operated in the left-right direction instead of the front-back direction. There was the inconvenience that the car did not rotate and the electric motor stopped.

When the suction port is lifted by hand, the electric motor is stopped as described above, but when the free wheel is touched by the hand, the free wheel is in the same state as when the free wheel contacts the floor surface. There is a risk of injury due to the rotation of the rotating brush up to the rotating brush and the accidentally getting a finger caught in the rotating brush.

In the case of the second embodiment, when the suction port is turned upside down, the switch is turned off by the moving body and the electric motor stops, but the moving body does not move only by lifting without turning it upside down. Since the switch remains ON, the electric motor does not stop and the rotary brush continues to rotate, so there is a risk that a finger may be accidentally caught in the rotary brush. Further, since the electric motor does not stop even when the suction port is left on the floor surface, there is a problem that the floor surface is damaged by the rotating brush.

In the case of the third embodiment, the operation control of the electric blower and the electric motor for driving the rotary brush is performed. However, since the pressure sensor and the current sensor are used for the operation control, there is a drawback that the product cost becomes high. It was

As described above, the conventional control means cannot secure the safety in all the states of the suction port, and the automatic operation control of the electric blower or the electric motor for driving the rotary brush is performed by the above control of the suction port. Since it has a control means different from the control means, the cost is high.

Therefore, an object of the present invention is to provide an electric vacuum cleaner which realizes a safe stop function of a rotating brush and automatic operation control by detecting a floor surface.

[0012]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention comprises a vacuum cleaner body having a built-in electric blower, a floor suction port having a rotary brush which is rotationally driven by a rotary brush driving electric motor, and the like. In a vacuum cleaner having a control circuit configured to control the rotary brush drive motor according to the usage state of the floor suction port, as one of the means, when the floor suction port is operated on the cleaning surface, A vibration detecting means for detecting vibration due to unevenness of the cleaning surface or a friction with the cleaning surface and a detachment detecting means for detecting whether or not the floor suction port is separated from the cleaning surface are also provided, and the vibration detecting means is provided in advance. When no vibration is continuously detected for a set time or more, or when the landing and landing detection means does not detect landing continuously for a preset time or more, the rotary brush drive electric motor is stopped or reduced. It is to be in.

As another means for solving the problems, during the control of the rotary brush driving electric motor by the detecting means, stop or input control of the electric blower is performed by an output signal of at least one detecting means of the detecting means. Assumed to be performed.

As another means for solving the problem, a reversing driving means for controlling the rotation direction of the rotating brush driving electric motor by the output signal of the vibration detected by the detecting means is provided.

As another means for solving the above problem, the vibration is detected by the detection means continuously for a preset time or longer during the stop or deceleration control of the rotary brush driving electric motor and the electric blower by the detection means. Then, the rotating brush driving electric motor and the electric blower are started.

It should be noted that by providing the floor / suction inlet with vibration / desorption detection means, which is composed of the vibration detection means and the desorption means as one detection means, the detection means can be downsized and the cost can be reduced. Means can be provided.

[0017]

By providing the above-mentioned means, (1) during cleaning, the floor suction port is not operated on the cleaning surface, or when it is lifted from the cleaning surface, the state is maintained for a preset time or longer. If so, the rotating brush driving motor is stopped, and the rotating rotating brush is not touched. Further, even if the rotating brush is touched, the rotating brush does not rotate.

(2) Energy saving and low noise are achieved by stopping or decelerating the electric blower when the rotating brush driving electric motor is stopped or decelerating.

(3) The reversal drive means for reversing the rotation direction of the electric motor for driving the rotary brush in response to the vibration signal of the vibration detection means can obtain the rotation direction of the rotary brush suitable for the material of the floor surface, thereby improving the cleaning efficiency. To do.

(4) Also, while the rotating brush driving electric motor and the electric blower are stopped by the vibration detecting means, both the electric motors are activated if the detecting means detects vibration for a preset time or more, so that the switch is activated. Cleaning can be restarted by moving the floor suction port without operating.

(5) By configuring the vibration detecting means and the detachment / attachment detecting means as one detecting means, the detecting means can be downsized and the cost can be provided.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is an external view showing the overall structure of the electric vacuum cleaner of the present invention, and FIG.
Is a plan view of the floor suction port with the cover removed, FIG. 3 is a control circuit block diagram, and FIG. 4 is an electric circuit diagram.

Reference numeral 1 is a main body of the vacuum cleaner, which has an electric blower 17 inside.
Has a suction hose 3 at the suction port 2 of the cleaner body 1.
One end of the suction hose 3 is detachably connected, and the grasping portion 4 of the suction hose 3 is provided with an operating portion 5. An extension pipe 6 is connected to the other end of the suction hose 3, and a floor suction port 7 is bonded to the tip of the extension pipe 6.

The operating section 5 controls the phase of the input voltage to the electric blower 17 by operating the operating knob 8 provided on the operating section 5 to adjust the suction force of the cleaner body 1.

The floor suction port 7 has a rotating brush 9 for cleaning the floor surface and a circuit brush driving electric motor (hereinafter referred to as an electric motor) 11 for driving the rotating brush 9 via a belt 10 therein. The dust collected is the floor suction port 7,
It passes through the extension pipe 6 and the suction hose 3 and is collected in a dust bag (not shown) built in the cleaner body 1.

The rotating brush 9 is rotatably supported by the floor suction port 7, and the rotating force of the electric motor 11 is applied to the belt 1.
It is decelerated via 0 and transmitted to rotate.

The electric motor 11 is controlled by the type of floor surface, that is, the load. The control is performed by the control device 12. The control device 12 generally controls the rotation of the electric motor 11 by an operation signal from the operation section 5, but the present invention is based on the detection signal of the vibration detection means 13. A vibration detection circuit 14 that outputs a control signal, and a detachment detection circuit 16 that outputs a control signal in response to a detection signal of the detachment detection means 15 that detects detachment of the floor suction port 7 from the floor surface.
The signals of the vibration detecting means 13, the detachment / attachment detecting means 15, the vibration detecting circuit 14, and the detachment / attachment detecting circuit 16 are used to control the rotation, stop, rotation speed, rotation direction, etc. of the electric motor 11.

A control block diagram of the vacuum cleaner of the present invention is shown in FIG. As described above, the electric blower 17 and the electric motor 11 are controlled by the operation unit 5, the vibration detection unit 13, and the attachment / detachment detection unit 15, respectively.

The vibration detecting means 13 detects the vibration due to the unevenness of the cleaning surface when the floor suction port 7 is moved on the cleaning surface, and one embodiment thereof is shown in the cross-sectional view of the main part of FIG. . The vibration detecting means 13 is mounted on the bottom surface 7a of the floor suction port 7, and is composed of a piezoelectric element 18, a vibration actuator 19, and a vibration spring 20.

The vibration actuator 19 is set to such a degree that when the floor suction port 7 is placed on the cleaning surface of the flooring system such as between the plates, the cleaning surface is lightly contacted by the urging force of the spring 20.

The piezoelectric element 18 is an element that differentially generates an electric charge in proportion to the change of the applied stress, and a slight vertical change caused by moving the vibration actuator 19 on the cleaning surface is mediated by the spring 20. Detected as a stress change. Then, the electric charge generated by the stress change is converted into a voltage signal by the vibration detection circuit 14 which will be described later, and is used as a signal of the type of the cleaning surface and the stop of the rotary brush 9 of the floor suction port 7.

Further, the attachment / detachment detecting means 15 includes the floor suction port 7
Is detected from the cleaning surface, and one example thereof is shown in the cross-sectional view of the main part of FIG. 6 (a). The attachment / detachment detection means 15 is attached to the bottom surface 7a of the floor suction port 7, and is composed of a micro switch 21 and an attachment / detachment actuator 22. FIG. 6B is a cross-sectional view of a main part showing another embodiment, which is composed of a reed switch 23 and a detection actuator 25 having a permanent magnet 24.

The detection actuator 22 (25) is located inside the floor suction port 7 and turns on the micro switch 21 (reed switch 23) when the floor suction port 7 is landed on the cleaning surface. Have control. Then, when the floor suction port 7 is lifted from the cleaner surface, the detection actuator 2
2 (25) is a detection actuator 22 from the floor suction port 7
The self-weight of (25) and the urging force of the actuator 21a of the microswitch 21 (the self-weight of the permanent magnet 24) cause the microswitch 21 (the reed switch 23) to be turned off.

Although the vibration detecting means 13 and the attachment / detachment detecting means 15 are described separately in FIGS. 6 (a) and 6 (b), respectively, it is also possible to configure both means as one detecting means. The configuration will be described in detail below with reference to FIG.

The vibration / detachment detection means 26 in which the vibration detection means 13 and the attachment / detachment detection means 15 are integrated is composed of a piezoelectric element 18, a vibration spring 27, an attachment / detachment spring 28, a detection actuator 29, and a piezoelectric element actuator 30. , The detection actuator 2 provided on the bottom surface 7a of the floor suction port 7
Reference numeral 9 is provided so as to come into contact with the cleaning surface when the floor suction port 7 is placed on the cleaning surface.

The detection actuator 29 is urged downward by the attachment / detachment spring 28 in order to reliably operate as the attachment / detachment detection means when the floor suction port 7 is lifted (FIG. 7A). The gap between the detection actuator 29 and the piezoelectric element 18 at that time is set to be slightly larger than the sum of the length of the vibration actuator 29 and the free length of the vibration spring 27.

Then, when the floor suction port 7 is placed on the cleaning surface such as between the plates, the detection actuator 29 as shown in FIG. 7B.
Is adjusted to such an extent that it moves upward against the biasing forces of the detachable spring 28 and the vibration spring 27, and the piezoelectric actuator 18 is lightly pressed by the vibration actuator 29.

The operation portion 5 is provided on the handle portion 4 of the suction hose 3 as described above, and the operation circuit 30 is housed in the handle portion 4. When the user operates the operation knob 8 or the like, the operation contents are transmitted via the operation circuit 30 from the control circuit 31 incorporated in the cleaner body 1 to the drive circuit 32. The electric blower 17 is controlled by the output signal of.

Next, a detailed description of vibration detection will be given with reference to FIG.
And based on FIG. When the floor suction port 7 is used on the cleaning surface, the vibration actuator 29 moves up and down due to the unevenness of the cleaning surface, so that the vibration spring 27 vibrates the piezoelectric element 18.

Since the state of the unevenness differs depending on the cleaning surface, the vibration detected by the piezoelectric element 18 is, for example, as shown in FIG. 8A on a carpet and as shown in FIG.
In the flooring system such as b and board, it is obtained as a signal as shown in FIG.

The charges output from the piezoelectric element 18 are input to the vibration detection circuit 14. That is, in FIG. 9, the operational amplifier 3 is used as a voltage signal through the high impedance discharge resistor 33 and the protection clamp diodes 34 and 35.
6 is input.

The operational amplifier 36 operates as a voltage follow impedance conversion circuit for converting a signal from the high impedance piezoelectric element 18 into a low impedance, and a resistor 37 and a capacitor 38 for removing noise components.
Is input to the control circuit 31 via the low pulse filter.

The vibration signals obtained by the vibration / detachment detection means 26 are shown in FIG.
Although it can be obtained as shown in b and c, on the cleaning surface of the carpet system of FIG. 8-a, the peak period of the output signal is long,
The feature is that the peak value becomes high and the fluctuation of the peak value is large.

Further, FIG. 8B shows the signal on the fold, the peak period is shorter than that of the carpet system, and the peak value is also lower.

Further, FIG. 8C shows a signal on a cleaning surface of a flooring system with little unevenness such as between plates, which is characterized in that the peak period is short and the peak value is lower and stable than any cleaning surface. is there.

As described above, the material and type of the cleaning surface can be discriminated and detected based on the characteristics of the output signal generated depending on the type of the cleaning surface, and as a result, the output signal is cleaned from the control circuit 31 to the electric blower 17 and the electric motor 11. It is possible to control the state suitable for the surface, that is, start, stop, rotation speed, rotation direction, and the like.

Although not shown in FIG. 8, when the operation of the floor suction port 7 is stopped or when the floor suction port 7 is lifted from the cleaning surface, it goes without saying that the output signal does not change and becomes zero.

To detect detachment / attachment, when the floor suction port 7 is lifted from the cleaning surface, the vibration actuator 29 causes the vibration spring 2 to move.
By the urging force of 7 and the detaching spring 28, the piezoelectric element 1
8, the vibration to the piezoelectric element 18 disappears, the switch (not shown) is turned off, the circuit of the electric motor 11 is opened, and the rotation of the electric motor 11 is stopped.

A control method for controlling the electric motor 11 by determining the type and material of the cleaning surface by the vibration on the cleaning surface will be described below. For example, the rotating brush 9 is shown in FIG.
As shown in FIG. 0, in the case where the rubber blade 39 and the brush 40 are arranged in parallel in a spiral shape, the rubber blade 39 raises the carpet hair on the carpet as shown in FIG. The rotation is controlled in the scraping direction, that is, the counterclockwise direction, and the rotation between the folding plates is controlled in the clockwise direction so as to sweep the cleaning surface with the brush bristles 40 as shown in FIG. 10-b.

The above-mentioned control of the rotation direction is performed by the vibration detection signal of the cleaning surface by the vibration / detachment detecting means 26 as shown in FIG.
If the peak value is high and unstable like "-a", it is judged as "rug", and the control circuit 31 controls it in the counterclockwise direction by the inversion drive circuit 32a. In addition, FIG.
In the case of a stable signal such as c, it is determined to be a folding / flooring system, and the rotation direction of the rotary brush 9 is controlled clockwise by the anti-driving circuit 32a from the control circuit 31.

The drive circuit 32, as shown in FIG.
Triac 4 in series with commercial power supply 41 and electric blower 17
2 are connected in series, and a resistor 43 and a phototriac 44 are connected in parallel between the gates G and T ₂ of the triac 42, and they are ignited by a phase control method.
The ignition input (LED) signal 44 a of the phototriac 44 is output from the control circuit 31.

FIG. 12 shows the ignition input signal and the electric blower 1
7 shows the relationship between the input voltages of the ignition input signal (Fig.
2-a) is turned on, the triac is fired,
The voltage in the shaded area (FIG. 12-b) is input to the electric blower 17.

In the present embodiment, the control circuit 31 pulse-fires the triac 42 and determines the phase angle, that is, the input value of the electric blower 17 by the timer means from the voltage zero cross signal of the commercial power source. Needless to say.

FIG. 13 shows an embodiment of a reversing drive circuit 32a for reversing the electric motor 11 in response to the cleaning by the vibration signal from the vibration / separation detecting means 26 of the floor suction port 7.

The commercial power supply 41 is full-wave rectified by the diode bridge 45, the drop resistor 46, the Zener diode 4
7. The electrolytic capacitor 48 produces a constant voltage current for the base currents of the transistors 49 and 50.

When the control circuit 31 outputs a signal 51a to the LED of the photocoupler 51, the transistor of the photocoupler 51 is turned on, a current flows through the resistor 52 to the base of the transistor 53, and the transistor 49 is turned on. .

When the transistor 49 is turned on, the resistor 53
A base current flows to the transistor 54 through the transistor 54, the transistor 54 turns on, and the transistor 5 passes through the resistor 55.
6 turns on. As a result, the full-wave rectified voltage causes a current to flow from the transistor 56 through the transistor 49 from the left side to the right side of the motor 11.

A signal 57 is sent to the LED of the photocoupler 57.
When a is input, on the contrary, a current flows from the right side to the left side of the electric motor 11.

The electric motor 11 is driven in the forward and reverse directions as described above, but by the vibration detecting means 13 described above,
For example, the vibration detection signal for "carpet" (Fig. 14-
When (a) is input to the control circuit 31 and is output from the control circuit 31 to the LED of the photocoupler 51, the rotating brush 9 rotates in the counterclockwise direction, and also the vibration detection signal of "folding, between plates" (Fig. 14).
-B) is input to the control circuit, and when the control circuit 31 outputs it to the LED of the photocoupler 57, the rotary brush 9 is rotated clockwise, so that the rotary brush 9 is controlled according to the cleaning surface. You can

The display circuit a58 shown in FIG. 3 displays the operation contents set by the user and the operation state of the electric blower 17, and the display means a59 may be any display means such as an LED or a neon lamp, and the operation section 5 is usable. Alternatively, it may be arranged anywhere on the cleaner body 1.

The display circuit b60 is for displaying the operating state of the electric motor 11 of the floor suction port 7, and its display means b.
61 may be any display means such as an LED or a neon lamp, and may be arranged anywhere on the operation section 5 or the floor suction port 7.

Next, the operation of the electric vacuum cleaner of the present invention will be described with reference to the rotary brush driving electric motor 11 and the electric blower 17 shown in FIG.
16 is a flowchart of the electric motor drive for driving the rotary brush of FIG.
The description will be made based on the electric blower driving flowchart.

First, referring to the flowchart of FIG. 15, the user sets the drive of the rotary brush 7 using the operation unit 5 and starts the operation (15-1).

First, in the state (15-2) in which the display while the rotating brush is stopped is released, the floor surface is not detected, so the cleaning surface is the most difficult to damage, and touching the rotating brush 7 is not dangerous. In the wiping rotation direction (15-3),
The rotating brush 7 is rotated at a low speed (15-4).

The setting of these initial states attaches importance to the user's intention to rotate the rotating brush 7, and causes the rotating brush 7 to rotate for the time being. However, even if the initial setting is not rotating, there is no problem. There is no. In this way, if you do not rotate in the initial setting, (1
It is good to start from 5-16).

After setting the initial state of (15-4), it is judged by the vibration / detachment detection means 26 (hereinafter referred to as detection means) whether or not the floor suction port 7 is lifted or turned upside down. (15-5) If it is lifted, if lifting is detected continuously for a preset time or more (15-6), the process proceeds to the stop process (15-1).
6).

If the lifting time is less than the set value, the detecting means 26 determines whether there is vibration, that is, whether the floor suction port 7 is operated by the user (15-7),
When there is no vibration, if there is no vibration continuously for a preset time or more (15-8), the process proceeds to the stop processing as in (15-6) (15-16).

If there is no vibration for less than the set time or if there is vibration, the type of floor material is judged based on the detected vibration waveform (FIG. 8) (15-9).

Here, as described above, in the case of the carpet type, the rotary brush 9 is scraped out and rotated in the rotating direction (15-10).
Then, high speed rotation (15-11) is controlled. In the case of a folding system, the low speed rotation (15-13) is controlled in the direction of wiping rotation (15-12). Furthermore, if it is a flooring system, it will rotate in the wiping direction (15-14) and rotate at medium speed (1
5-15) Perform drive settings that are considered to be most suitable experimentally, such as control.

Although the types of materials for the cleaning surface are classified into three types in this embodiment, the number of types is increased or fuzzy inference using the amplitude value, the absolute value and the period of the vibration waveform as input is performed. There are various methods such as a method of finely setting the rotation direction and the number of rotations, and the present invention is not limited to this embodiment.

As described above, after the rotary drive suitable for the material of the cleaning surface is set, the process proceeds to (15-5) again, and corresponds to the case where the lifting of the floor suction port is stopped or the cleaning surface is changed. To go around the main routine.

Then, the above (15-6) and (15-
If the stop processing is required in 8), the electric motor 11 is turned off, that is, the rotating brush 9 is stopped (15-16), danger prevention and scratches on the cleaning surface are prevented, and the display means a59 is turned on as a stop display ( 15-17).

It is to be noted that the above-mentioned stop display means a indicates that the user is forced to stop the lifter for the floor suction port 7 or to stop the operation, despite the setting that the user rotates the rotary brush 9. Although it is displayed, contrary to the present embodiment,
It may be displayed only during rotation, or the presence or absence of rotation may be displayed by changing the display color.

Further, when the floor suction port 7 continues to be lifted (15-18), the stopped state is maintained, and when the floor suction port 7 has been lifted, the presence or absence of vibration is detected. (15-19), and if there is continuous vibration for a preset time or longer (15-20), the stopped display means a is turned off (15-21), and the cleaning surface of (15-9). Return to the material detection main routine.

As the above-mentioned conditions for returning the rotation, both the condition without lifting and the condition that the vibration continues for a set time or more are satisfied. That is, the user, especially the child, carelessly touches the attachment / detachment detecting means 15. This is because the importance is attached to the safety that the rotary brush 9 does not shift to rotation in a situation where the detection means 26 is pressed or a shock is applied to the detection means 26 for a short time in the pressed state.

Next, the control of the electric blower 17 built in the cleaner body 1 will be described with reference to the flowchart of FIG. Also in this embodiment, in consideration of the intention of the user when the user starts the operation (16-1), the display means of the electric blower 17 is turned off (16-2), and the suction force is initially set to a weak setting. (16-3).

Further, as described later, this weak setting may be a minimum input setting such that the rotation of the electric blower 17 can be discriminated by its rotating sound.

After the initial setting, the presence or absence of vibration is detected by the detecting means 26 (16-4), and when the vibration is not continuously detected for a preset time or longer (16-5), the electric blower 17 is stopped or Move to minimum input setting (16-1
0).

If the vibration-free state is less than the set time or there is vibration, the type of the cleaning surface material is judged from the vibration waveform (FIG. 8) (16-6).

Here, unlike the rotary brush driving electric motor 11, the reason why the lifting of the floor suction port 7 is not used as a criterion is that the user intentionally lifts the floor suction port 7 and This is because it is possible that there is a situation where the wall vibrates.

The material of the cleaning surface is judged (16-6), and if it is a carpet type, the suction force of the electric blower 17 is strongly set (16).
-7), medium setting (16-8) for a folding system, weak setting (16-9) for a flooring system, etc., like the experimentally obtained optimum suction force as with the rotating brush drive electric motor 11. Control.

Also here, the rotary brush driving electric motor 1 is used.
Similar to the control of No. 1, there are various methods of controlling the number of steps, and the number of steps is not limited to this embodiment.

After the optimum suction force is set for the material of the cleaning surface as described above, the process returns to (16-4) in order to respond to the operation stop of the floor suction port and the change of the material of the cleaning surface, and the main routine is executed. Go around.

In (16-5), if no vibration continues for a set time or longer. The electric blower 17 is stopped or set to the minimum input (16-10), and an energy saving effect or noise reduction when the floor suction port 7 is not used is tested.

The minimum input setting for the electric blower 17 is a weak setting that allows the user to determine the rotation of the electric blower 17 by the rotation sound. Therefore, when the minimum input setting is performed, the display by the display means is displayed. There is virtually no problem even if omitted, and a reduction in product cost can be expected.

When the electric blower 17 is turned off, the display means is turned on to inform the user that the electric blower 17 is stopped.

Next, there is a condition that the rotation of the electric blower 17 shifts or the minimum input setting is restored to the normal variable input. If there is vibration (16-12) and the vibration continues for a preset time or longer (16-13). ), The display means b61 is turned off (16-14), and the process returns to the main routine of (16-6).

Since there is no danger associated with the rotational transition of the rotary brush, that is, there is no danger that a hand will be caught in the rotary brush 9 when it suddenly starts to rotate, the set time with vibration is a condition for returning the rotary brush 9 to rotation. It is set shorter than the set time with vibration.

[0089]

Since the present invention has the above-described structure, it has the following effects. According to the first aspect of the present invention, the electric motor of the floor suction port is stopped and decelerated by the vibration and desorption detecting means provided in the floor suction port. Therefore, when the floor suction port is lifted from the cleaning surface,
Even if you touch the rotating brush, there is no risk of your fingers being caught or the rotating brush rotating unexpectedly.

According to the second aspect of the present invention, when the rotary brush is stopped and decelerated, the vacuum cleaner is not in use. Therefore, by stopping or decelerating the rotation of the electric blower, the electric bill is saved, that is, the energy saving effect is achieved. In addition, the noise of the electric blower is reduced, resulting in a low noise effect.

According to the third aspect, the type and material of the cleaning surface are determined by the vibration detection signal of the cleaning surface, and the rotating direction of the rotary brush is changed according to the type and material, so dust on the cleaning surface is effective. It is also effective in shortening the cleaning time.

According to the fourth aspect, when the cleaning work is stopped without turning off the operation section during the cleaning, the rotation of the rotary brush and the electric blower is stopped or slowed down, and the electric vacuum cleaner is stopped. When I try to clean again,
When the floor suction port is continuously moved for a certain amount or more, the rotary brush and the electric blower are rotated again in the cleaning state, and therefore the cleaning state can be immediately set without turning on the switch each time.

According to claim 5, By configuring the vibration detecting means and the attachment / detachment detecting means as one detecting means, the detecting means can be downsized and an inexpensive detecting means can be provided.

[Brief description of drawings]

FIG. 1 is an external perspective view showing an overall configuration of an electric vacuum cleaner of the present invention.

FIG. 2 is a plan view of a main part of the floor suction port with an upper cover removed.

FIG. 3 is a control circuit block diagram of the electric vacuum cleaner.

4 is an overall electric circuit diagram of the electric vacuum cleaner of the present invention based on the control block diagram of FIG. 3. FIG.

FIG. 5 is a cross-sectional view of a main part of a vibration detection unit attached to a floor suction port.

6A and 6B are cross-sectional views of the essential parts of the attachment / detachment detection means attached to the floor suction port, FIG. 6A showing one embodiment and FIG. 6B showing another embodiment.

FIG. 7 is a cross-sectional view of an essential part of the vibration / desorption detecting means of the present invention, in which (a) shows the state of the detecting means when the floor suction port is lifted, and (b) shows the floor suction port. It shows the state of the detection means when placed on the floor.

FIG. 8 is a distribution diagram of an output signal indicating the vibration of the cleaning surface by the vibration detecting means of the present invention. Here, (a) is a carpet system, (b) is a folding system, and (c) is a flooring cleaning surface.

FIG. 9 is a vibration detection circuit diagram which similarly outputs a signal from the vibration detection means to a control circuit.

FIG. 10 is a cross-sectional view of a main part of a rotary brush used for the floor suction port of the present invention, where (a) is used on a carpet, and (b) is used between a fold and between plates. The case is shown.

FIG. 11 is a drive circuit diagram used in the electric vacuum cleaner of the present invention.

FIG. 12 is an operation time chart showing a relationship between an ignition input signal (a) to the drive circuit and an input voltage (b) of an electric blower according to the input signal.

FIG. 13 is a reverse drive circuit diagram used in the electric vacuum cleaner of the present invention.

FIG. 14 is an operation time chart showing a relationship between a forward / reverse rotation input signal (FIGS. A and b) to the inverting drive circuit and an input voltage to the electric motor (FIG. C) by the input signal.

FIG. 15 is a control flowchart of a rotary brush driving electric motor of the electric vacuum cleaner of the present invention.

FIG. 16 is a control flowchart of the electric blower of the electric vacuum cleaner.

[Explanation of symbols]

 7 Floor Suction Port 9 Rotating Brush 11 Rotating Brush Driving Electric Motor 13 Vibration Detection Means 15 Desorption / Detection Means 17 Electric Blower 26 Vibration / Detachment Detection Means 31 Control Circuit 32 Drive Circuit 32a Inversion Drive Circuit

Claims (5)

[Claims] 1. A vacuum cleaner body having a built-in electric blower, a floor suction port having a rotary brush that is rotationally driven by a rotary brush driving electric motor, and the like, rotating according to the usage state of the floor suction port. In an electric vacuum cleaner having a control circuit for controlling a brush driving electric motor, when the floor suction port is operated on a cleaning surface, vibration detecting means for detecting vibration due to unevenness of the cleaning surface or friction with the cleaning surface, and Provided with a detachment detection means for detecting whether or not the floor suction port is separated from the cleaning surface, the vibration detection means does not continuously detect vibration for a preset time or more, or the detachment detection means is An electric vacuum cleaner, wherein when the landing is not detected continuously for a preset time or longer, the rotary brush driving electric motor is stopped or decelerated. 2. The control of the electric motor for driving the rotary brush by the detection means is controlled by the output signal of at least one of the detection means to stop or input the electric blower. The vacuum cleaner according to claim 1. 3. The electric vacuum cleaner according to claim 1, further comprising reversal driving means for controlling a rotation direction of the circuit brush driving electric motor according to an output signal of the vibration detected by the detecting means. . 4. If the vibration is detected by the detecting means continuously for a preset time or longer during the stop or deceleration control of the rotating brush driving electric motor and the electric blower by the detecting means, the rotating brush driving The electric vacuum cleaner according to claim 1, wherein the electric motor and the electric blower are activated. 5. The vibration detection means and the attachment / detachment detection means are configured as one detection means, and the vibration / desorption / attachment detection means is provided at the floor suction port. Vacuum cleaner.