JP3301101B2 - Floor nozzle for 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 a floor nozzle for a vacuum cleaner.

[0002]

2. Description of the Related Art A conventional floor nozzle for a vacuum cleaner will be described below with reference to FIG.

[0003] 19 in the floor nozzle for sucking dust by electric vacuum cleaner (not shown), the motor 20 and the belt 2
1 and a rotating brush 22 on its bottom surface,
It has a traveling roller 23. 24 is the floor nozzle 19
Is an extension tube that connects the door electric vacuum cleaner body.

[0004] The power of the motor 20 is transmitted to the rotating brush 22 by a belt 21 to scrape up dust such as carpet. The power of the motor 20 is also transmitted to the traveling roller 23 by the belt 21 to improve the operability.

[0005]

In recent high-power vacuum cleaners, the operation resistance of the floor nozzle is increased due to a large suction force, and a self-propelled floor nozzle provided with a traveling roller is effective. With the conventional self-propelled floor nozzle of the configuration, the rotating brush and the traveling roller are linked, so it can only be operated on the carpet, and the floor and tatami mats other than the carpet can be cleaned by rotating the traveling roller. If this happens, the floor and tatami mats may be damaged due to the rotating brush that is rotating in conjunction.

[0006] Further, since there is no control circuit for controlling the motor, a running force corresponding to the operating resistance of the floor nozzle cannot be obtained.

The present invention solves the above-mentioned problems, and provides a floor nozzle which can be used without damaging it other than carpets and which has extremely excellent operability in which the running force changes due to the operation resistance of the floor nozzle. The purpose is to:

[0008]

In order to achieve the above object, the present invention provides a rotary brush, a motor for rotating the rotary brush, power transmission means for transmitting power to the rotary brush, and a traveling roller. A traveling motor that rotates the traveling roller, a power transmission unit that transmits power to the traveling roller, a pressure sensor that detects a vacuum pressure in the suction chamber, and a direction detector that detects a moving direction of the floor nozzle. have a vacuum pressure high detected by the pressure sensor
Then, the rotational force of the traveling motor is increased, and the vacuum pressure is reduced.
If it is, set the rotational force of the traveling motor low, and
The travel direction of the floor nozzle is determined by the output of the travel direction detector.
And the traveling motor rotates in the direction corresponding to the
And a control circuit for performing the control.

[0009]

According to the present invention, the dedicated motors for the rotating brush and the traveling roller are provided individually for the rotating brush, so that the traveling roller can be operated independently. By detecting the moving direction and controlling the rotational force and the rotational direction of the traveling motor, it is possible to provide a floor nozzle capable of obtaining a traveling force according to the operation resistance of the floor nozzle.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the configuration of a floor nozzle according to an embodiment of the present invention. The rotating brush motor 2 applies a rotating force only to the rotating brush 4 connected by the belt a3 to form a rotating brush system independently of the traveling system. On the other hand, the traveling motor 5 applies a rotational force to only the traveling rollers 7a and 7b via the belt b6 and the shaft 8, thereby forming a traveling system. The pressure sensor 10 is disposed in the suction chamber of the floor nozzle 1, and its output is sent to the traveling motor control circuit 9. The traveling direction detector 11 is arranged on the bottom surface of the floor nozzle 1 and its output is sent to the traveling motor control circuit 9. Also,
The traveling motor control circuit 9 is connected to the traveling motor 5 .

In operation, the pressure sensor 10 detects the vacuum pressure in the suction chamber of the floor nozzle 1 and sends a signal to the motor control circuit 9 for traveling. The traveling direction detector 11 detects the moving direction (forward, backward, stop, etc.) of the floor nozzle and sends a signal to the traveling motor control circuit 9. The traveling motor control circuit 9 first includes a pressure sensor 10
The current operation resistance of the floor nozzle 1 is determined based on the output of the suction chamber. If the vacuum pressure in the suction chamber is high, the operation resistance is large, so the rotational force (torque) of the traveling motor 5 is set high. Is low, the torque (torque) of the traveling motor 5
Is set low and the traveling motor 5 is controlled. The traveling motor control circuit 9 determines the moving direction of the floor nozzle 1 based on the output of the traveling direction detector 11 and controls the traveling motor 5 to rotate in a direction corresponding to the moving direction. FIG. 2 is a block diagram showing this configuration.

The drive system and the control system of the rotary brush 4 are completely different from the traveling system of the floor nozzle 1, and can be arbitrarily operated depending on the type of the floor surface as in the conventional rotary brush. It can be turned on or off.

As described above, according to the present embodiment, the pressure sensor for detecting the pressure in the suction chamber of the floor nozzle, the direction detector for detecting the direction of movement of the floor nozzle, and the traveling motor based on signals from these sensors. By providing a control circuit for controlling and a running motor separate from the rotating brush system, the running force (the running of the floor nozzle by the running roller) depends on the operating resistance of the floor nozzle.
It is possible to provide a floor nozzle in which the running force is optimally controlled and the floor surface is not damaged.

[0015]

As is clear from the above description of the embodiment, the present invention generates a running force according to the operation resistance and the moving direction of the floor nozzle, so that the operation is light on any floor surface and the operability is remarkably improved. In addition, it is possible to provide a vacuum cleaner, and it is possible to rotate only the traveling roller 7a, so that it is possible to prevent the floor surface from being damaged by the rotating brush.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a floor nozzle for a vacuum cleaner according to an embodiment of the present invention.

FIG. 2 is a block diagram of the control unit.

FIG. 3 is a cross-sectional view showing a configuration of a conventional floor nozzle.

[Explanation of symbols]

 Reference Signs List 1 floor nozzle 2 rotating brush motor 3 belt a 4 rotating brush 5 running motor 6 belt b 7 running roller 8 shaft 9 running motor control circuit 10 pressure sensor 11 running direction detector 12 electric wire 13 extension tube 14 running motor Control circuit unit 15 Pressure sensor unit 16 Running direction detecting unit 17 Running motor 18 Hand switch 19 Floor nozzle 20 Motor 21 Belt 22 Rotary brush 23 Running roller 24 Extension tube

──────────────────────────────────────────────────の Continued on the front page (72) Inventor Satoshi Murata 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Takafumi Ishibashi 1006 Kadoma Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. (56) References JP-A-2-7923 (JP, A) JP-A-3-29 (JP, A) JP-A-2-144030 (JP, A) JP-A-2-224630 (JP, A) JP-A-5-245071 (JP, A) JP-A-4-231017 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47L 9/02-9/04

Claims (1)

(57) [Claims] 1. A rotating brush, a motor for rotating the rotating brush, power transmission means for transmitting power to the rotating brush, a traveling roller, a traveling motor for rotating the traveling roller, and the traveling a pressure sensor for detecting the vacuum pressure of the suction chamber power transmission means for transmitting power to use rollers, possess a direction detector for detecting a moving direction of the floor nozzle, a high vacuum pressure detected by the pressure sensor
If it is, the rotational force of the traveling motor is high, and the vacuum pressure is
If it is low, set the torque of the traveling motor low, and
In addition, the movement of the floor nozzle is determined by the output of the traveling direction detector.
Direction, and the traveling motor rotates in the direction corresponding to that direction.
A floor nozzle for a vacuum cleaner having a control circuit for controlling to rotate.