JP3061438B2 - Electric vacuum cleaner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to home and commercial vacuum cleaners.

[0002]

2. Description of the Related Art FIG.
Explanation will be given based on FIG. FIG. 5 is an external view of a conventional vacuum cleaner, and FIG. 6 is a block diagram of a control circuit of the vacuum cleaner. In FIG. 5, 14 is a cleaner body, 15 is a hose, 16 is a floor suction tool, and 17 is an extension pipe for extending the floor suction tool 16 from the hose 15. Reference numeral 18 denotes a hand switch unit.

In FIG. 6, reference numeral 19 denotes a hand switch unit, 2
0 is a control circuit, 21 is a drive circuit, and 22 is an electric blower. The rotation speed of the electric blower 22 is controlled by the control circuit 20. In the vacuum cleaner configured as described above,
First, when the electric blower 22 is operated by the hand switch 19 so as to rotate at a certain rotation speed, the control circuit 20 receives a signal from the hand switch 19 and causes the electric blower 2 to operate.
2 to output a signal. In response to the signal, the drive circuit 21 drives the electric blower 22 to rotate at a certain rotation speed, and generates a force for sucking dust into the cleaner body 14. At this time, when cleaning the floor, the extension pipe 17 and the floor suction tool 16 are connected to the end of the hose 15, and if the condition on the floor surface is equal, the suction power of the vacuum cleaner is constant. No problem with cleaning.

[0004]

However, in this conventional structure, a floor suction device is used for a wall, a corner of a floor, or a place where a corner is present with other objects (hereinafter referred to as "a wall or the like"). During cleaning, only the front, rear, left and right ends where the suction force of the floor suction device is weak hit the portion where dust is present due to walls and obstacles. For this reason, it has been difficult to clean a wall or the like with a floor suction tool using only a suction force equivalent to a flat surface portion of the floor. Therefore, in order to clean the wall or the like, it is necessary to increase the suction force by operating the hand switch unit or remove the floor suction tool and suck the dust existing on the wall or the like by the extension pipe unit.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and even when cleaning a flat surface of a floor with a floor suction device attached thereto, a place such as a wall is used. An object of the present invention is to provide a vacuum cleaner which increases a suction force by sensing a certain situation and returns to the original suction force when the user moves away from a wall or the like.

[0006]

According to a first aspect of the present invention, a vacuum cleaner having an electric blower, and a hand switch for variably operating the number of revolutions of the electric blower are provided. A hose connected to the cleaner body having a portion, a floor suction tool provided with a switch that operates in contact with a wall or the like, a drive circuit for driving the electric blower, and a switch for the floor suction tool. And a control circuit for controlling the rotation speed of the electric blower to be increased when operated.

According to a second aspect of the present invention, there is provided a cleaner body having an electric blower, a hose having a hand switch for variably operating the number of rotations of the electric blower and connected to the cleaner body,
A floor suction device provided with a pressure sensor for detecting pressure by abutting against a wall or the like; a drive circuit for driving the electric blower; and a pressure sensor for the floor suction device for detecting pressure. A vacuum cleaner having a control circuit for controlling so as to increase the rotation speed of the blower.

[0008]

According to the first aspect of the present invention, a floor suction is provided.
A switch that operates when the tool touches a wall
Since the control circuit controls the number of rotations of the electric blower in accordance with the on / off signal of the switch of the floor suction device , even if the electric blower is rotating at a constant number of rotations, which is a flat portion on the floor surface, The switch of the floor suction device is pressed when the suction device for a floor hits a wall or the like, and while the switch is pressed, the rotation speed increases and the suction force increases. Further, when the floor suction tool is separated from the wall or the like, the switch returns, the rotation speed returns to the original value, and the suction force returns to the original value.

In the second invention, the floor suction tool is located near a wall.
Pressure sensor that detects pressure by contacting
When the pressure sensor detects the pressure, the control circuit controls the rotation speed of the electric blower to increase, so that even if the electric blower is rotating at a constant rotation speed that is a flat part on the floor, When the suction tool hits against a wall or the like, the pressure sensor detects the pressure. During the detection of the pressure, the rotation speed increases and the suction force increases. Further, when the floor suction device separates from the wall or the like, the pressure received by the floor suction device returns, the rotation speed returns to the original value, and the suction force returns to the original value.

[0010]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing a floor suction device of a vacuum cleaner according to a first invention of the present invention, FIG.
FIG. 3 is a block diagram of a control circuit of the vacuum cleaner according to the first invention. 1 and 2, reference numeral 1 denotes a floor suction device for a vacuum cleaner according to the first invention of the present invention.
Reference numeral 4 denotes a switch provided on the floor suction device. In FIG.
Is a floor suction tool, 2, 3 and 4 are switches for sensing the front side, the left and right side walls, and the like.
5 is a hand switch unit, 6 is a control circuit, 7 is a drive circuit, 8
Is an electric blower. The control circuit 6 has switches 2, 3, 4
And the output of the hand switch unit 5 are input. The drive circuit 7 receives the signal from the control circuit 6 and can rotate the electric blower 8.

The operation of the vacuum cleaner constructed as described above will be described. First, the hand switch unit 5 is operated to rotate the electric blower 8 at a certain rotation speed. The control circuit 6 receives the signal from the hand switch unit 5 and outputs a signal to supply electric power for rotating the electric blower 8 at a certain rotation speed. Upon receiving this signal, the driving circuit 7
Drives the electric blower 8 to rotate at a certain rotation speed. Now, when using the floor suction tool to clean the floor surface around which there is no wall or the like, the electric blower 8 is rotating at a certain rotation speed. In this state, when trying to clean a wall or the like, if at least one of the switches 2, 3, and 4 provided on the floor suction device 1 is pressed against the wall or the like, the control circuit 6 will operate the floor suction device. 1 determines that it is cleaning a wall or the like, and outputs a signal to the drive circuit 7 to increase the power supply to the electric blower 8, and the rotation speed of the electric blower 8 increases. On the other hand, when all of the switches 2, 3, and 4 are released from being pressed by the wall or the like, the control circuit 6 outputs a signal to the drive circuit 7 so as to rotate at the original rotational speed, and The blower 8 rotates at the original rotation speed. At this time, the rotation speed is changed almost in real time.

As described above, according to the first aspect of the present invention, switches are provided on the front surface and the left and right sides of the floor suction device to detect the vicinity of a wall or the like. A control circuit that controls the number of revolutions of the electric blower based on the signal from the switch is provided, so it is possible to increase the suction power of the vacuum cleaner only when cleaning the side of the wall, etc. it can. Therefore, without removing the suction device for floor or operating the suction force with the hand switch, it is necessary to use the suction force on the floor, etc. or on the floor that is not near the wall, etc., while cleaning with the suction device for floor. Can be.

Next, a second embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. In the second invention, each of 2, 3 and 4 in FIG. 1 indicates a pressure sensor.
FIG. 4 is a block diagram of a control circuit of the vacuum cleaner according to the second invention of the present invention. In FIG. 4, reference numeral 9 denotes the second embodiment of the present invention.
FIG. 4 shows a floor suction device of a vacuum cleaner according to the invention of FIG.
Reference numerals 10, 11, and 12 denote pressure sensors for sensing the front of the floor suction tool and the sides of the wall provided on both left and right sides, respectively. Reference numeral 13 denotes a control circuit, and pressure sensors 10, 11, and 12 are provided.
And the output of the hand switch unit 5 are input.

The operation of the electric vacuum cleaner constructed as described above will be described. First, the hand switch unit 5 is operated to rotate the electric blower 8 at a certain rotation speed. The control circuit 13 receives a signal from the hand switch unit 5 and outputs a signal to supply electric power for rotating the electric blower 8 at a certain rotation speed. In response to the signal, the drive circuit 7 drives the electric blower 8 to rotate at a certain rotation speed. Now, when using the floor suction tool to clean the floor surface around which there is no wall or the like, the electric blower 8 is rotating at a certain rotation speed. When trying to clean a wall or the like in this state, the pressure sensors 10 and 1 provided on the floor suction tool 9 are used.
If at least one of the pressure sensors 1 and 12 is pressed against a wall or the like and the pressure sensor receives the pressure, the control circuit 13 sends the floor suction device 9
Determines that it is cleaning a wall or the like, and outputs a signal to the drive circuit 7 to increase the power supply to the electric blower 8, and the rotation speed of the electric blower 8 increases. On the other hand, pressure sensor 1
When all of 0, 11, and 12 are pressed against the wall or the like and the pressure sensor is released from the pressure, the control circuit 13 outputs a signal to the drive circuit 7 to rotate at the original number of revolutions. Then, the electric blower 8 rotates at the original rotation speed. At this time, the rotation speed is changed almost in real time.

According to the second aspect of the present invention, pressure sensors are provided on the front surface and the left and right sides of the floor suction device for detecting the edge of a wall, etc., and the signal from the hand switch and the floor suction device are provided. A control circuit that controls the number of revolutions of the electric blower based on the signal from the pressure sensor is provided, so the suction power of the vacuum cleaner is increased only when cleaning the side of the wall, etc. with the floor suction tool attached, and the dust is sucked. be able to. Therefore,
Without removing the floor suction device or operating the suction force with the hand switch, it is possible to use the suction force on the wall or the like or on the floor that is not near the wall while cleaning the floor suction device. .

[0016]

As described above, according to the present invention, as a first invention, a switch which operates by contacting a floor suction tool against a wall or the like is provided.
By installing a control circuit that increases the rotation speed of the electric blower by operating the switch of the floor suction device, the floor suction device can be removed without removing the floor suction device or operating the suction force with the hand switch. It is possible to realize an excellent vacuum cleaner capable of performing cleaning by properly using a suction force on a floor surface or the like or on a floor surface other than a wall surface with the display on.

According to a second aspect of the present invention, a floor suction device is provided.
A pressure sensor that detects pressure by contacting against a wall
To detect the pressure with the pressure sensor of the floor suction device.
A control circuit that increases the number of revolutions of the electric blower is provided, so that the floor suction device is not removed and the suction switch is not operated with the hand switch. It is possible to realize an excellent vacuum cleaner that can perform cleaning by properly using the suction force on the floor surface that is not.

[Brief description of the drawings]

FIG. 1 is a plan view showing a floor suction tool of a vacuum cleaner according to a first invention of the present invention.

FIG. 2 is a front view showing the floor suction tool of the vacuum cleaner according to the first invention.

FIG. 3 is a block diagram of the vacuum cleaner according to the first invention.

FIG. 4 is a block diagram of a vacuum cleaner according to the second invention.

FIG. 5 is an external view of a conventional vacuum cleaner.

FIG. 6 is a block diagram of a conventional vacuum cleaner.

[Explanation of symbols]

 1, 9 Floor suction device 2, 3, 4 switch 5 Hand switch unit 6, 13 Control circuit 7 Drive circuit 8 Electric blower 10, 11, 12 Pressure sensor

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Tetsu Murata 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-4-97724 (JP, A) JP-A-3-3- 272722 (JP, A) JP-A-50-86165 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47L 9/28 A47L 9/02-9/06

Claims (2)

(57) [Claims] 1. A cleaner body having an electric blower, a hose having a hand switch for variably operating the number of rotations of the electric blower and connected to the cleaner body, and abutting against a wall or the like.
Floor suction device provided with a switch that operates in a vertical direction, a drive circuit for driving the electric blower, and a switch for the floor suction device
A control circuit for controlling so as to increase the number of revolutions of the electric blower when operates . 2. A cleaner main body having an electric blower, a hose having a hand switch portion for variably operating the rotation speed of the electric blower and connected to the cleaner main body, and abutting against a wall or the like.
Floor suction device equipped with a pressure sensor that detects pressure
A drive circuit for driving the electric blower, and the floor suction tool
A control circuit for controlling the electric fan to increase the rotation speed when the pressure is detected by the pressure sensor .