JPH04122341A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To save energy and improve the operability by a method wherein a state sensor is equipped on a manual operating part, and a signal processing circuit starts and stops an electric fan or increases and decreases the suction force according to output signals of the state sensor. CONSTITUTION:A light shield element 18 is held at the center of a state detector 15 by flexible supports 16 and 17 so that the center of the light shield element 18 agrees with the centers of a light emitting element 19 and a light receiving element 20 facing each other. A voltage is applied to the light emitting element 19 and the light receiving element 20 through resistors 23 and 24, outputs of the light receiving element 20 are input to an amplifier 26 through a capacitor 25 and outputs of the amplifier 26 are input to a signal processing circuit 27. The signal processing circuit 27 always detects whether or not a manual operating part is in action, according to outputs of the state sensor 15. Only when the manual operating part is in action, the rotating speed of an electric fan 30 is increased to increase the suction force, and when the manual operating part is stopped or is below a specified speed, a phase control circuit 28 performs controls so that the electric fan 30 is operated at a reduced rotating speed to decrease the suction force or stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a vacuum cleaner that controls the operation of an electric blower based on an output signal from a state sensor that detects movement of a hand-held operating unit.

BACKGROUND OF THE INVENTION In recent years, vacuum cleaners have been required to be more user-friendly by controlling the operation of an electric blower when the user operates a hand-held operation unit.

Conventionally, this type of vacuum cleaner generally had a configuration as shown in FIGS. 3 and 4. The configuration will be explained below.

As shown in the figure, a hose 2 is connected to a vacuum cleaner main body 1, a hand-operated part 3 is provided at the tip of the hose 2, and a floor suction device 4 is further provided. An electric blower 5 and a first bidirectional thyristor 6 are connected in series to the AC power source.
A second bidirectional thyristor 8 is connected to the gate of the bidirectional thyristor 6 through a resistor 7, and a trigger element 9 is connected between the gate of the second bidirectional thyristor 8 and one side of the AC power source. , through current limiting resistor 10.11, hose 2
A switch 12 and a slide resistor 13 arranged on the hand operation section 3 at the tip are connected. Further, a capacitor 14 is connected between the trigger element 9 and the T1 terminal of the second bidirectional thyristor 8.

As is clear from the above configuration, when the value of the slide resistor 13 of the hand control unit 3 is changed, the charging time of the capacitor 14 is changed, the trigger timing of the trigger element 9 is changed, and the electric power of the electric blower 5 is changed. be controlled.

Problems to be Solved by the Invention In such conventional vacuum cleaners, when changing the suction force of the electric blower 5, the user must manually change the value of the slide resistor 13 of the hand control unit 3. , and when an obstacle is encountered during cleaning, it is necessary to turn off the switch 12, which is cumbersome to operate.

The present invention is intended to solve the above-mentioned problems, and aims to improve energy saving and operability by detecting the movement of the hand-held operating unit using a state sensor and controlling the operation so that it operates only when actual cleaning is being performed. It is said that

Means for Solving the Problems In order to achieve the above object, the present invention includes a state sensor that includes a light shield supported by a telescopic support in an optical system, detects vibrations of the light shield, and a state sensor that detects vibrations of the light shield. It is equipped with a signal processing circuit that inputs an output and drives a phase control circuit, and a bidirectional thyristor that is triggered by the output of the phase control circuit and controls the operation of the electric blower. However, a means for solving the problem is that the signal processing circuit operates/stops the electric blower or increases/decreases the suction force based on the output signal of the condition sensor.

Function: The present invention uses the above-mentioned problem-solving means, whereby the light shielding body of the status sensor vibrates three-dimensionally in up, down, left and right directions in conjunction with the movement of the hand operation unit, and the light shielding body detects the movement of the hand operation unit as a change in light intensity. The suction force of the electric blower can be freely controlled in conjunction with the movement of the hand control unit.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIGS. 1 and 2.

As shown in the figure, the condition sensor 15 is attached to a telescopic support 1
6.17, the light shielding body 18 is supported at its center so that the center of the light shielding body 18 is located at the center of the light emitting element 19 and the light receiving element 20 which are arranged facing each other. Reference numerals 21 and 22 are holders that hold the light emitting element 19 and the light receiving element 20. This status sensor 15 is attached to a hand-operated part (not shown) at the end of the hose.

A voltage is applied to the light emitting element 19 and the light receiving element 20 via resistors 23 and 24, and the output of the light receiving element 20 is input to the amplifier 26 via the capacitor 25, and the output is input to the signal processing circuit 27. Furthermore, the output thereof is connected to a phase control circuit 28, and the output of the phase control circuit 28 is configured to control the electric power of the electric blower 30 via a bidirectional thyristor 29.

The operation of the above configuration will be described. Due to the configuration of the status sensor 15, it is possible to detect the movement of the hand-held operation unit in any direction, up, down, left, or right. That is, the signal processing circuit 27 constantly detects whether or not the handheld operation unit is moving based on the output of the status sensor 15, and only when the handheld operation unit is moving, the rotation speed of the electric blower 30 is increased to increase the suction force. If the operation unit stops or the speed is below the set speed, the phase control circuit 28 can control the electric blower 30 to reduce its rotational speed and reduce or stop the suction force.

Effects of the Invention As is clear from the above embodiments, according to the present invention, a status sensor is attached to the hand-operated unit, and the signal processing circuit operates/stops the electric blower or increases/decreases the suction force based on the output of the status sensor. Since this is done, the status sensor can accurately detect the movement of the hand control unit in all angles, and it is possible to automatically stop the electric blower and change the suction force to increase or decrease in conjunction with the hand control unit. This not only makes it possible to use electricity more effectively, but also improves usability and safety.

[Brief Description of the Drawings] Fig. 1 is a block circuit diagram of a vacuum cleaner according to an embodiment of the present invention, Fig. 2 is a longitudinal sectional view of a status sensor of the same vacuum cleaner, and Fig. 3 is a conventional vacuum cleaner. A perspective view of the vacuum cleaner, and FIG. 4 is a circuit diagram of the vacuum cleaner. 15... Status sensor, 16.17...
Support body, 18... Light shielding body, 27... Signal processing circuit, 28... Phase control circuit, 29...
...Bidirectional thyristor, 30...Electric blower. Name of agent Written by patent attorney Akira Okaji and two others Figure 7゛1 Figure 7

Claims (1)

[Claims] a state sensor that includes a light shield supported by a retractable support in an optical system and detects vibrations of the light shield; a signal processing circuit that inputs the output of the state sensor and drives a phase control circuit; a bidirectional thyristor that is triggered by the output of the circuit and controls the operation of the electric blower, the condition sensor is attached to the hand control unit, and the signal processing circuit operates/stops the electric blower by the output of the condition sensor. Or a vacuum cleaner that increases or decreases suction power.