JPH1128179A - Electric vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the loosing of the dust collecting efficiency of an electric vacuum cleaner in the movement of the improved suction force of the vacuum cleaner and to additionally improve performance such as bad operability, heaviness at the time of cleaning the surface of a carpet. SOLUTION: When a dust sensor 108 does not detect dust at the time of cleaning the surface of a carpet, a motor 111 within a floor suction tool is rotated in the positive rotating direction to rotate a rotary brush in the direction of making the floor suction tool self-travel. When the sensor 108 detects the dust, the motor 111 is rotated in the reverse rotating direction to rotate the rotary brush in the direction of raking up the dust attached on the carpet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control circuit for a floor suction device, and more particularly to a self-propelled floor suction device with a high suction force in recent years.

[0002]

2. Description of the Related Art Vacuum cleaners have a dust sensor in a dust passage of a hand-operated part of the vacuum cleaner along with diversification of objects to be cleaned, such as carpets. Some control and display the presence or absence of dust.

Conventional electric cleaning will be described with reference to FIGS. As shown in the figure, 101 is a cleaner body, one end of a hose 102 is connected to the cleaner body 101,
A hand operation unit 103 is provided on the other end side. One end of the extension tube 104 is connected to the hand operation unit 103, and a floor suction tool 105 is connected to the other end.

The hand operation unit 103 includes a suction force selection switch 106, a floor selection switch 107, a dust sensor 108, and a signal processing unit 10 including a microcomputer.
9 are built in, and these parts include a cleaner main body 101.
Power is supplied through the hose 102. The signal processing unit 109 outputs a phase control signal in response to the settings made by the switches 106 and 107 and an input from the dust sensor 108, and the phase control signal is transmitted to the vacuum cleaner main body 101 via the hose 102 to perform the electric cleaning. The output of the electric blower 110 provided in the main body 101 is controlled to change the suction force. That is, the signal processing unit 109
The ON / OFF control of the triac 30 connected in series to the electric blower 110 is controlled by the phase control signal from the controller.

Electric power is also supplied to the floor suction device 105 from the cleaner main body 101 via the hose 102, the hand operation unit 103, and the extension pipe 104. In the element and the motor 111,
In this configuration, the DC voltage of the DC power supply means 11 is applied.
When dust is detected by the dust sensor 108 provided in the hand operation unit 103, dust presence is displayed by the dust presence / absence display element, and when the carpet is selected by the floor selection switch 107, the motor 111 is rotated. When the electric motor 111 rotates, the rotary brush rotates via the belt, and the rotary brush scrapes up dust. The direction of rotation of the rotary brush is mainly the direction in which dust is scraped, that is, the direction opposite to the traveling direction of the floor suction device 105. However, in order to improve the operating force of the floor suction device, the rotation of the floor suction device 105 is increased. In some cases, the rotary brush is rotated in the same direction as the traveling direction, so that the floor suction tool 105 runs on its own.

[0006]

However, in the above-mentioned prior art, when the carpet is set by the floor selection switch 107, the electric blower 110 is controlled with a high suction force, so that the floor suction tool 105 is placed on the carpet. It sucks and the operability of the floor suction tool 105 is poor,
In particular, excessive force was required on long-haired carpets. In addition, when cleaning the corners of the carpet, the carpet itself will be sucked, and in order to release the carpet, the operation of the electric blower 110 must be stopped once, or the car must be separated by hand. When the rotating brush is rotated in the self-propelled direction with emphasis on the operability of the floor suction device 105, dust collecting efficiency is deteriorated in a carpet with long hairs.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a vacuum cleaner having good usability and light operability.

[0008]

In order to achieve the above object, the present invention provides a dust sensor for detecting dust sucked from a floor suction tool, an electric motor for driving a rotary brush for scraping dust, and the dust sensor. A signal processing unit that controls the rotation direction of the electric motor according to the output of
When dust is detected by the dust sensor, the rotation of the motor is rotated in the direction of scraping up the dust, so that the dust collection efficiency is not reduced. When the dust sensor is no longer detected, the moving direction of the floor suction tool , The operability of the floor suction tool is improved.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION
A floor suction device, a dust sensor for detecting dust sucked from the floor suction device, a rotary brush built in the floor suction device to scrape up dust, an electric motor driving the rotary brush brush, and A signal processing unit for controlling the rotation direction of the electric motor according to the output of the dust sensor is provided. According to this configuration, when dust is detected by the dust sensor, the rotation of the motor is rotated in a direction to scrape the dust. Therefore, without lowering the dust collection efficiency,
Further, when the dust is no longer detected by the dust sensor, the direction is set to the same direction as the traveling direction of the floor suction device, so that the operability of the floor suction device is improved.

According to a second aspect of the present invention, there is provided a floor suction device, a rotary brush built in the floor suction device for scraping dust, an electric motor for driving the rotary brush, and the floor suction device. An obstacle detecting means for detecting an obstacle in front of the tool body, and a signal processing unit for controlling a rotation direction of the electric motor in accordance with an output of the obstacle wall detecting means, When the obstacle detector detects that the floor suction tool approaches the wall, the rotating direction of the rotating brush is set to the opposite direction to the traveling direction, so that dust is scraped up. Dust collection efficiency can be improved in places where dust is difficult to remove.

According to a third aspect of the present invention, there is provided a floor suction device, a rotary brush built in the floor suction device for scraping dust, and a drive source for driving the rotary brush. The rotating brush is the leftmost brush, the center brush,
It is divided into three right end brushes, the left side brush, the center brush, and the right side brush are arranged coaxially, and the rotation direction of the center brush is different from the rotation direction of the other brushes. According to the configuration, the rotating brushes on both sides are self-propelled rotations (in the same direction as the traveling direction of the floor suction device), and the central rotating brush is a scraping rotation (in a direction opposite to the traveling direction of the floor suction device). Thus, light operation can be performed without lowering the dust collection efficiency.

The invention according to claim 4 of the present invention is the invention according to claim 3.
In addition to the above-described invention, a dust sensor that detects dust sucked from the floor suction tool and a signal processing unit that controls a rotation direction of a driving source according to an output of the dust sensor are provided. For example, if dust is not detected by the dust sensor, the rotating brushes on both sides will rotate by themselves, and the central rotating brush will be scraped up.If dust is detected by the dust sensor, the rotating brushes on both sides will be scraped and rotated.
Since the central rotating brush is set to self-running rotation, the scraping effect can be enhanced and dust collection efficiency can be increased as compared with the case where dust is not detected.

The invention according to claim 5 of the present invention is the invention according to claim 3.
The driving source of the invention described in the above, the left brush, the center brush, and each of the right brush is individually driven, and the left brush, the center brush, the rotation direction or the number of rotations of the right brush is changed, According to this configuration,
Normally, the rotating brushes on both sides are self-propelled and the center rotating brush is lifted up to improve the operating force. When the side of the floor suction device hits the wall, the rotating brush close to the wall (right or left rotating) Brush) makes a sweeping rotation, the other performs self-propelled rotation, and when the front of the floor suction tool hits, all the rotating brushes make a sweeping rotation to improve the operating force and dust collection efficiency. Can be.

[0014] The invention according to claim 6 of the present invention is directed to claim 5.
In addition to the described invention, a detection unit that detects an obstacle that hinders the movement of the floor suction tool, and a signal processing unit that controls a rotation direction of a driving source according to an output of the detection unit, According to this configuration, it is possible to detect whether there is an obstacle such as a wall in front of the side surface or the front side of the floor suction tool, and to automatically control the rotation direction of each rotary brush based on the detection result. .

The invention according to claim 7 of the present invention is directed to claim 5
Or in addition to the invention as set forth in claim 6, further comprising angle detecting means for detecting the degree of inclination of the floor suction tool with respect to the floor surface, and controlling the operation of the drive source according to the output of the angle detecting means. According to the method, when the floor suction tool is tilted, the rotating brush that is tilted is rotated to be picked up, and the rotating brush on the other side is rotated independently, so that the direction can be easily changed.

[0016]

【Example】

Embodiment 1 Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. The same components as those of the conventional example are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 1, the floor suction device has an outer shell composed of an upper member (not shown), a lower member 2, and a bumper 3 sandwiched between these members. Reference numeral 4 denotes a rotating brush having a pulley 5, which is rotatably arranged in a floor suction tool. An electric motor 111 is provided inside the floor suction device.
And a pulley 6 (hereinafter referred to as an electric motor pulley) is fixed to a shaft of the electric motor 111. A belt 7 is stretched between the pulley 5 and the electric motor pulley 6, and the rotation of the electric motor 111 is transmitted to the rotating brush 4. Reference numeral 8 denotes a connection pin for supplying power to the electric motor 111 and the control circuit through the vacuum cleaner main body 101, the hose 102, the hand operation unit 103, and the extension pipe 104. A roller 9 is provided on the bottom surface of the floor suction tool 105, and rotates by friction with the floor surface when cleaning a wooden floor or the like.

In FIG. 2 showing the circuit configuration of the present embodiment,
Reference numeral 10 denotes a commercial power supply, which supplies power to the DC power supply 11, the AC synchronization generator 12, the electric blower 110, and the motor 111. The DC power output from the DC power supply 11 serves as a power source for the signal processing unit 109 and the dust sensor 108. The garbage sensor 108 is provided from the floor suction device to the vacuum cleaner main body 101.
Dust passage to reach, preferably arranged to be able to detect dust passing through the dust passage located in the hand operation unit, and, specifically, comprises a light emitting element and a light receiving element,
Dust blocks light from the light-emitting element to the light-receiving element to detect the presence and amount of dust.

The signal processing unit 109 includes a floor selection switch 1
06, power selection switch 107, dust sensor 108
From the electric blower 110 and the electric motor 1
11 is controlled, and when dust is detected by the dust sensor 108, the display element 36 is turned on to notify the user of the presence of dust.

Electric blower 1 provided in vacuum cleaner main body 101
A first bidirectional thyristor 30 is connected to the commercial power supply 10.
Are connected in series. The hand operation unit 103 is provided with a signal processing unit 109.
9 is connected to a DC voltage of a DC power supply 11 via a hose 102, and is connected to an AC synchronizing signal generating means 12 for outputting a signal synchronized with zero volt of a commercial power supply. Signal. The output of the signal processing unit 109 is the first photocoupler 31
Are connected via a limiting resistor 32. A first photocoupler 31 is connected between T2 of the first bidirectional thyristor 30 and the gate terminal via a current limiting resistor 33.
Output terminals are connected.

The DC power supply 11, the resistor 34, and the floor selection switch 106 are DC-connected, and connected between the resistor 34 and the floor selection switch 106 via the limiting resistor 35 to the input side of the signal processing unit 109. I have. The display element 36 is connected from a DC power supply via a resistor 37, and is connected to the output side of the signal processing unit 109.

Electric motor 11 provided on floor suction device 105
1, a commercial power supply 10 includes a hose 102 and a hand operation unit 10.
3, supplied through the extension pipe 104,
, A diode 38, a second bidirectional thyristor 39, and a motor 111 are connected in series. The circuit configuration of the second photocoupler 40 is the same as that of the first photocoupler 31, and the description is omitted. In parallel with the diode 38 and the second bidirectional thyristor 39, a second diode 41 and a third bidirectional thyristor 42, which are opposite to the die auto 38, are connected. Since the circuit configuration of the third photocoupler 43 is the same as that of the second photocoupler 40, the description is omitted.

The operation in the above configuration is as follows. When floor or folding is selected by the floor selection switch 106, the signal processing unit 109 outputs a phase control signal to the secondary side of the first photocoupler 31. Then, at the phase angle, the primary side performs a switching operation, and the signal is input to the gate of the first bidirectional thyristor 30, T1 and T2 are short-circuited, and the electric blower 110 rotates.

When dust is detected by the dust sensor 108, the signal processor 109 changes the phase angle to increase the suction force. Further, the display output of the signal processing unit 109 is set to LOW, and the display element 36 is turned on. When the carpet is selected by the floor selection switch 106, the signal processing unit 109 performs the same operation as that of the electric blower 110 and the display, but when there is no input from the dust sensor 108, that is, when the dust is detected, If not, the rotating brush is rotated in the direction in which the floor suction tool advances (in this embodiment, the direction in which the floor suction tool advances) (hereinafter, this rotation direction is referred to as forward rotation). Specifically, the signal processing unit 109 outputs the signal to the second photocoupler 40 that rotates the electric motor 111 in the forward direction, turns on T1 and T2 of the second bidirectional thyristor 39, and rotates the electric motor 111 in the forward direction. . The rotation of the electric motor 111 is transmitted to the rotating brush 4 by the shaft pulley 6, the belt 7, and the pulley 5, and the rotating brush 4 also rotates forward.

When dust is detected by the dust sensor 108,
The signal processing unit 109 outputs the signal to the third photocoupler 43 that rotates the electric motor 111 in the direction in which the carpet is scraped, that is, in the direction opposite to the forward rotation (hereinafter, referred to as reverse rotation), and the third bidirectional T1 and T2 of the thyristor 42 are turned on to rotate the electric motor 111 in the reverse rotation direction. The rotation of the motor 111 is transmitted to the rotating brush 4 by the shaft pulley 6, the belt 7, and the pulley 5, and the rotating brush also rotates in the reverse direction. Therefore, when there is no dust, the rotating brush is set to the self-propelled rotation to improve the operation force, and when there is dust, it is lifted and rotated to improve dust collection efficiency.

(Embodiment 2) A second embodiment of the present invention will be described below with reference to FIG. Since the basic configuration is the same as that of the first embodiment, the same components are denoted by the same reference numerals and description thereof will be omitted. The feature of this embodiment is that an obstacle detecting means 51 for detecting an obstacle such as a wall is provided at the front of the floor suction tool 105. The obstacle detection means 51 has a detection switch 50 which is turned on when it hits a wall.
The switch 50 is turned on and off to detect that the front portion of the floor suction tool 105 hits the wall.

In FIG. 4 showing the circuit configuration of this embodiment,
The obstacle detecting means 51 is composed of a series circuit of a resistor 49 connected to the DC power supply 11 and a detection switch 50, and is input to the nozzle signal processing unit 53 via the limiting resistor 52 from between the resistor 49 and the detection switch 50. Is done. The input terminals of the second and third photocouplers 40 and 43 are connected to the output side of the nozzle signal processing unit 53. Reference numeral 54 denotes a nozzle DC power supply device inside the floor suction tool 105, which is a power supply for the nozzle signal processing unit 53 and the obstacle detection means 51.

Reference numeral 55 denotes a phototransistor which switches on the output side when a current flows on the input side. The input side is connected in series with the commercial power supply 10, the limiting resistor 56, and the switching side of the fourth photocoupler 57. The input side of the fourth photocoupler 57 is connected to the signal processor 109 via the resistor 58.
It is connected to the. The output side of the phototransistor 55 is connected to the DC power supply 11 via a resistor 59.
In addition, it is connected to the nozzle signal processing unit 53 via a limiting resistor 60 from between the resistor 59 and the output side of the phototransistor 55. Since the configuration of the electric blower 110 of the main body is the same as that of the first embodiment, the description is omitted.

The operation in the above configuration is as follows. The operation of the electric blower 110 is the same as in the first embodiment, and a description thereof will be omitted. When the carpet is selected by the floor selection switch 106, the signal processing unit 109 outputs the fourth photocoupler 57 so that a current flows. Switching is performed on the output side, current flows through the phototransistor 55, and the output side is turned on. The signal is sent to the nozzle signal processing unit 5
3, the nozzle signal processing unit 53 outputs the signal to the second photocoupler 40 that rotates forward with respect to the carpet,
The T1 and T2 of the second bidirectional thyristor 39 are turned on to rotate the electric motor 111 in the forward rotation direction.

When the detection switch 50 hits the wall and is turned on, the nozzle signal processing unit 53 receiving the signal outputs the signal to the third photocoupler 43 which rotates in the reverse direction with respect to the carpet, and outputs the signal to the third bidirectional thyristor. 42, T1 and T2 are made conductive, and the electric motor 111 is rotated in the reverse rotation direction. The rotation of the motor 111 is transmitted to the rotating brush 4 by the shaft pulley 6, the belt 7, and the pulley 5, and the rotating brush 4 also rotates in the reverse direction. Therefore, the operating force is usually improved by making the rotating brush self-propelled, but when cleaning the wall, the wall is detected and the rotating brush 4 is scraped up and rotated to improve dust collection efficiency. In particular, dust tends to accumulate near the walls,
Since it is difficult to suck the dust, if the rotating brush 4 is lifted and rotated, dust can be effectively collected.

(Embodiment 3) A third embodiment of the present invention will be described below with reference to FIG. The same components as those in the above embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 5, reference numerals 61 and 62 denote a right-hand rotating brush and a left-hand rotating brush. These rotating brushes 61 and 62 are fixed to a rotating brush shaft 63. Left rotating brush 6
Reference numeral 1 denotes an integrated pulley 5. The rotating brush shaft 63 is fixed to the lower member 2 of the floor suction tool 105 with bearings 64 and 65 at both ends. Reference numeral 66 denotes a central rotary brush integrated with the central pulley 71, and the rotary brush shaft 6
3 is not fixed, but is rotatably supported by the shaft.

Reference numeral 67 denotes a gear fixed to the motor 111, which rotates with the rotation of the motor 111. Reference numeral 68 denotes a gear meshing with the motor gear 67, which rotates in a direction opposite to the rotation of the motor 111. Reference numeral 69 denotes a shaft of a gear 68, which is arranged in parallel with the rotary brush shaft 63, and both ends of which are rotatably supported by the lower member 2 of the floor suction device 105 by bearings. 70 is a pulley fixed to the shaft 69,
It rotates in the same direction as the gear 68. Reference numeral 71 denotes a belt for transmitting the rotation of the shaft 69 to the central rotating brush 66.
And a pulley integrated with the central rotating brush 66. The other configuration is the same as that of the first embodiment, and the description is omitted.

The operation of the above configuration is as follows.
When the electric motor 111 is rotated when cleaning the carpet, the pulley 6 fixed to the shaft of the electric motor 111 rotates, and the belt 7 rotates with the rotation of the pulley 6.
The left rotating brush 61 integrated with the pulley on the belt 7 rotates, and the rotating brush shaft 63 also rotates. Further, the right rotating brush 62 fixed to the rotating brush shaft 63 also rotates.

The motor gear 67 rotates with the rotation of the motor 111, and rotates the gear 68 meshing therewith with the reverse rotation. Then, the shaft 69 fixed to the gear 68 rotates, and the central rotating brush 66 is rotated via the pulley 70 and the belt 71 fixed to the shaft 69 by the rotating brushes 6 on both sides.
The rotation is performed in a direction opposite to that of the rotations 1 and 62. In this embodiment, the rotation direction is changed by the gears. However, the rotation direction can be changed by using the electric motor for each of the center rotating brush 66 and the both-side rotating brushes 61 and 62.

As described above, the rotating brushes 61 and 62 on both sides are used.
The self-propelled rotation of the roller and the rotation of the central rotating brush 66 cause the floor suction device 105 to be lightly operated without lowering the dust collection efficiency.

(Embodiment 4) A fourth embodiment of the present invention will be described below with reference to FIG. The basic configuration is the same as that of the third embodiment, and the circuit configuration is the same as that of the first embodiment.

The operation in the above configuration is as follows. If the garbage is selected and dust is not detected by the dust sensor 108, the second rotation is forward with respect to the rug.
The signal processing unit 109 outputs to the photocoupler 40, and T1 and T2 of the second bidirectional thyristor 39 are turned on.
The motor 111 is rotated in the forward rotation direction. Motor 111
Is transmitted to the rotating brushes 61 and 62 on both sides, and the rotating brushes 61 and 62 rotate forward, and the floor suction device 1 is rotated.
05 is the rotation direction for self-running. In addition, since the central rotating brush 66 rotates in a direction opposite to the rotation of the electric motor 111, the central rotating brush 66 performs a scraping rotation.

When dust is detected by the dust sensor 108,
The signal processing unit 109 outputs the signal to the third photocoupler 43 that rotates in the reverse direction with respect to the carpet, turns on T1 and T2 of the third bidirectional thyristor 42, and rotates the motor 111 in the reverse rotation direction. By the rotation of the electric motor 111, the rotating brushes 61 and 62 on both sides perform reverse rotation, and the central rotating brush 66 performs forward rotation.

As described above, when no dust is detected,
Since the rotating brushes 61 and 62 on both sides are self-propelled and the central rotating brush 66 is swung up, the floor suction device 1 is rotated.
05, the dusting efficiency can be improved by improving the scraping force. Further, when dust is detected, the rotating brushes 61 and 62 on both sides are scraped and rotated, and the central rotating brush 66 is made to rotate independently. Therefore, the scraping force is increased by the rotating brushes on both sides, and the central rotating brush 66 Since the self-propelled rotation is performed, it is possible to prevent the operation of the floor suction tool 105 from becoming too heavy.

(Embodiment 5) A fifth embodiment of the present invention will be described below with reference to FIG. The basic configuration is the same as that of the third embodiment, but the rotary brushes 61 and 6 divided into three parts
It has a left electric motor 111, a right electric motor 81, and a central electric motor 80 for rotating each of the two brushes 2, 66, and also has a belt, a pulley, etc., respectively, so that the rotating directions of the three rotating brushes 61, 62, 63 can be freely changed. It is composed.

In FIG. 7 showing the circuit configuration of this embodiment,
Similar to the configuration for rotating the electric motor 111 of the first embodiment, the electric motor 80 includes fourth and fifth bidirectional thyristors 82 and 8.
3, diodes 84 and 85, and fifth and sixth photocouplers 86 and 87 are connected. Similarly, the electric motor 81 has the sixth and seventh bidirectional thyristors 88 and 89 and the diode 9.
0, 91 and seventh and eighth photocouplers 92, 93 are connected. Each of the above circuits is connected to the commercial power supply 10 in parallel.

The operation in the above configuration is as follows. The operation of the electric blower 110 is the same as that in the first embodiment, and a description thereof will be omitted. When the carpet is selected by the floor selection switch 106, the signal processing unit 109 outputs the second or third photocoupler 40 or 43 so that the current flows to rotate the electric motor 111. The output side performs switching, and the second or third bidirectional thyristor 39 or 40 conducts and rotates in the forward or reverse rotation direction. The rotation of the electric motor 111 is transmitted to the left rotating brush 61 by the shaft pulley 6, the belt 7, and the pulley 5, and the left rotating brush 61 also rotates in the forward or reverse rotation direction.
Similarly, the center rotating brush 66 and the right rotating brush 62 rotate in the same direction as the rotating directions of the electric motors 80 and 81.

Therefore, usually, the rotating brushes 61 on both sides,
Although the self-propelled rotation of the rotating brush 62 and the rotation of the central rotating brush 66 are lifted to improve the operability, when the side surface of the floor suction tool 105 hits the wall, the rotating brush 61 or 6 close to the wall is closed.
3 performs a sweeping rotation, and the other rotating brush 63 or 61 performs a self-propelled rotation. When the front of the floor suction tool 105 hits, all the rotating brushes 61, 62, and 66 are set to the scraping rotation to operate. Performance and dust collection efficiency can be improved.

(Embodiment 6) A sixth embodiment of the present invention will be described below with reference to FIG. The basic configuration is the same as that of the fifth embodiment, but the floor suction device 1 is detected by the wall detecting means 94 for detecting that the floor suction device 105 has hit the wall.
05 is configured to be able to detect that the side and front portions have hit the wall. As specific wall detection means,
An obstacle detecting means 51 including a detecting switch as shown in FIG. 3 can be provided on both sides of the floor suction tool 105.

In FIG. 8 showing the circuit configuration of this embodiment,
The wall detecting means 94 is connected to the nozzle DC power supply 54 and is supplied with electric power. The nozzle signal processing unit 53 is also connected to the nozzle DC power supply 54 and is supplied with power. The central motor 80 is connected to fourth and fifth bidirectional thyristors 82 and 83, diodes 84 and 85, and fifth and sixth photocouplers 86 and 87. Right motor 81
Similarly, the sixth and seventh bidirectional thyristors 88 and 89,
Diodes 90 and 91, 7th and 8th photocouplers 9
2, 93 are connected. Each of the above circuits is connected to the commercial power supply 10 in parallel.

The operation in the above configuration is as follows. When the carpet is selected by the floor selection switch 106, the signal processing unit 109 outputs the fourth photocoupler 57 so that a current flows. Switching is performed on the output side, current flows through the phototransistor 55, and the output side is turned on. The signal is input to the nozzle signal processing unit 53, and the nozzle signal processing unit 53 rotates the second and seventh photocouplers 40 and 92 in the forward rotation with respect to the carpet and the fifth in the reverse rotation with respect to the carpet.
And the T1, T2 of the second, sixth and seventh bidirectional thyristors 39, 83, and 88 are turned on to cause the left end motor 111 and the right end motor 81 to rotate in the forward direction and the central motor 80 to rotate in the reverse direction. Rotate.

When the wall detecting means 94 detects that the left end of the floor suction tool 105 has hit the wall, the nozzle signal processing section 53 having received the signal detects the left electric motor 111.
Is output to the third photocoupler 43 that rotates in the reverse direction with respect to the carpet and the fifth photocoupler 86 that rotates the central motor 80 forward, and the third and fifth bidirectional thyristors 4
The electric motor 111 is rotated in the reverse direction and the central electric motor 80 is rotated in the normal direction.

When the right end of the floor suction tool 105 hits the wall, only the right motor 81 is lifted and rotated, and when the front of the floor suction tool 105 hits, all the motors 111, 80, 81 are scraped. Raise the rotation. Therefore, usually, the rotating brushes 61 and 62 on both sides rotate by themselves,
The central rotating brush 66 is made to rotate by scraping, and the operating force is improved.
Or 62 performs a scraping rotation, and the other rotating brush 6
2 or 61 performs self-propelled rotation, and when the front hits, all the rotating brushes 61, 62, and 66 perform scraping rotation, thereby improving the operation force and further improving the dust collection efficiency. Further, the wall detection means 94 detects that the front and side portions of the floor suction tool 105 have hit the wall, and based on the detection result, each of the electric motors 80, 81, 11.
1 can be automatically switched, and the usability is good.

(Embodiment 7) A seventh embodiment of the present invention will be described below with reference to FIGS. FIG. 9 shows an upright type vacuum cleaner. In the figure, reference numeral 101 denotes a main body having a built-in electric blower 110, and a handle 102
A floor suction device 10 is provided below the main body 101.
5 is attached.

FIG. 10 is an enlarged view of the vicinity of the floor suction device 105. The main body 101 is configured to be tilted in the left-right direction. Provided on both sides. The other configuration of the floor suction tool 105 is the same as that of the fifth embodiment, and a description thereof will be omitted.

In FIG. 11 showing the circuit configuration of this embodiment, the angle detecting means 96 is connected to the nozzle DC power supply 54 and is supplied with electric power. The other circuit configuration is the same as that of the sixth embodiment, and the description is omitted.

The operation in the above configuration is as follows. When the carpet is selected by the floor selection switch 106, the signal processing unit 109 communicates with the nozzle signal processing unit 53, and the nozzle signal processing unit 53 causes the left motor 111 and the right motor 81 to rotate in the forward direction and the central motor 80 with respect to the carpet. Is rotated in the reverse rotation direction. When the main body 101 is tilted to the left, the left angle detecting means 96 detects that the main body 101 has tilted to the left, and upon receiving the signal, the nozzle signal processing unit 53 rotates the left electric motor 111 in the reverse rotation direction with respect to the carpet. Let it. When the main body 101 is tilted to the right, the right electric motor 81 and the central electric motor 80 are reversely rotated to perform a scraping rotation. For this reason, when the main body 101 is tilted, the rotating brush 61 or 62 that is tilted is swept up and the other rotating brush 62 or 61 is self-running, so that the direction can be easily changed.

In each of the embodiments described above, the rotation of the rotary brush in the direction in which the floor suction tool 105 is advanced is described as the self-propelled rotation direction. However, in the direction in which the floor suction tool 105 is moved backward. Rotating the rotating brush may be the self-propelled rotation direction. In this case, the operating force for moving the floor suction tool backward is reduced.
In order to reduce the operating force in both the forward and backward movements of the floor suction device, it is necessary to detect the forward / backward movement direction of the floor suction device and switch the rotation direction of the rotating brush according to this movement direction. I just need.

[0055]

As is apparent from the above embodiment, according to the first aspect of the present invention, when dust is not detected by the dust sensor, the rotating brush is set to self-propelled rotation to improve the operating force. When dust is detected, it is lifted up and rotated to improve dust collection efficiency, and since the operation is heavy until the dust disappears, it is possible to collect dust slowly and surely. .

According to the second aspect of the present invention, the operating force is usually improved by making the rotating brush self-running, but it is necessary to rotate the rotating brush when cleaning the wall which is easy to collect dust and is difficult to remove. It is possible to realize an excellent vacuum cleaner capable of performing cleaning suitable for a cleaning place in which the brush is lifted and rotated to improve dust collection efficiency.

According to the invention of claim 3 of the present invention, the rotating brushes on both sides are self-propelled and the central rotating brush is scraped up and rotated, so that the dust collection efficiency is not reduced and the light is reduced. An excellent vacuum cleaner that can be cleaned by operation can be realized.

According to the fourth aspect of the present invention, when dust is not detected by the dust sensor, the rotating brushes on both sides rotate by themselves, and the central rotating brush is swept up and rotated by the dust sensor. When dust is detected, the rotating brushes on both sides are scraped up and rotated, and the central rotating brush is made to rotate independently. Therefore, compared to a case where dust is not detected, the scraping effect can be enhanced and dust collection efficiency can be increased.

According to the fifth and sixth aspects of the present invention, the rotating brushes on both sides are usually self-propelled and the central rotating brush is scraped up to improve the operating force. When the side of the suction tool hits the wall, the rotating brush close to the wall makes a scraping rotation, the other rotating brush rotates by itself, and when the front hits, all the rotating brushes make a scraping rotation, and the dust is removed. It is possible to improve the operation power when cleaning the wall where dust is easy to collect and hard to remove, and to improve the dust collection efficiency. It can be carried out. According to the sixth aspect of the present invention, the rotation direction of the rotating brush can be automatically switched by detecting a wall or the like by the detecting means wall for detecting an obstacle, so that usability is further improved.

Further, according to claim 7 of the present invention,
When you want to change the direction of the main body, tilt the main body and the tilted rotating brush will be turned up, and the rotating brush at the other end will be self-running, so you can easily change direction,
Light operation and high dust collection performance are achieved even for upright type vacuum cleaners.

[Brief description of the drawings]

FIG. 1 is a plan view showing a first embodiment of the present invention in which an upper member of a floor suction device of a vacuum cleaner is removed.

FIG. 2 is a block diagram of a control device for a vacuum cleaner showing first and fourth embodiments of the present invention.

FIG. 3 is a plan view showing a second embodiment of the present invention in which an upper member of a floor suction device of a vacuum cleaner is removed.

FIG. 4 is a block diagram of a control device for a vacuum cleaner according to a second embodiment of the present invention.

FIG. 5 is a plan view showing the third and fourth embodiments of the present invention, in which an upper member of a floor suction device of a vacuum cleaner is removed.

FIG. 6 is a plan view showing the fifth, sixth, and seventh embodiments of the present invention in which an upper member of a floor suction tool of a vacuum cleaner is removed.

FIG. 7 is a block diagram of a control device for a vacuum cleaner showing a fifth embodiment of the present invention.

FIG. 8 is a block diagram of a control device for a vacuum cleaner showing a fourth embodiment of the present invention.

FIG. 9 is an external perspective view of a vacuum cleaner showing a seventh embodiment of the present invention.

FIG. 10 is a partially cutaway perspective view around the floor suction device of the vacuum cleaner.

FIG. 11 is a block diagram of a control device of the vacuum cleaner.

FIG. 12 is an external perspective view of a conventional vacuum cleaner.

FIG. 13 is a block diagram of a control circuit of a conventional vacuum cleaner.

[Explanation of symbols]

 Reference Signs List 4 rotating brush 51 obstacle detecting means 61 left rotating brush 62 right rotating brush 66 center rotating brush 80 central motor 81 right motor 94 wall detecting means 96 angle detecting means 105 floor suction device 108 dust sensor 109 signal processing unit 110 electric blower 111 Electric motor

Claims (7)

[Claims] 1. A floor suction device, a dust sensor for detecting dust sucked from the floor suction device, a rotary brush built in the floor suction device for scraping up dust, and driving the rotary brush brush And a signal processing unit for controlling the rotation direction of the electric motor according to the output of the dust sensor. 2. A floor suction device, a rotary brush built in the floor suction device for scraping dust, an electric motor for driving the rotary brush, and an obstacle in front of the floor suction device body. A vacuum cleaner comprising: a front detection unit for detecting; and a signal processing unit for controlling a rotation direction of the electric motor in accordance with an output of the front wall detection unit. 3. A floor suction device, a rotary brush built in the floor suction device for scraping dust, and a drive source for driving the rotary brush, wherein the rotary brush is a left end brush, a center brush, An electric vacuum cleaner comprising: a right end brush; a left brush, a center brush, and a right brush arranged coaxially; and a rotation direction of the center brush is different from a rotation direction of the other brushes. 4. The vacuum cleaner according to claim 3, further comprising a dust sensor for detecting dust sucked from the floor suction tool, and a signal processing unit for controlling a rotation direction of a driving source according to an output of the dust sensor. . 5. The driving source individually drives each of the left brush, the center brush, and the right brush, and varies the rotation direction or the number of rotations of the left brush, the center brush, and the right brush. Vacuum cleaner as described. 6. A detecting means for detecting an obstacle which hinders movement of the floor suction tool, and a signal processing unit for controlling a rotation direction of a driving source in accordance with an output of the detecting means. Vacuum cleaner. 7. An apparatus according to claim 5, further comprising an angle detecting means for detecting a degree of inclination of the floor suction tool with respect to the floor surface, and controlling an operation of the drive source in accordance with an output of the angle detecting means.
Vacuum cleaner as described.