JPS6314614B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a vacuum cleaner, and its purpose is to provide an energy-saving vacuum cleaner that allows current to flow through an electric blower only when necessary.

As shown in FIG. 1, a conventional vacuum cleaner has an electric blower 2 provided in a main body 1, and a filter 4 provided in a dust collection case 3. A hose 5 is led out from the dust collection case 3, and an extension pipe 6,
There is also a suction port 7, a hose 5 and an extension pipe 6.
A hand switch 8 is provided at the connection part.
The main electrical circuit between the hand switch 8 and the electric blower 2 is as shown in FIG. is connected.

With the above configuration, when cleaning, hold the hand near the hand switch 8, and turn the hand switch 8.
turns on, which causes the contacts of transformer relay 9 to
It turns on, current flows to the electric blower 2, and the vacuum cleaner starts suctioning. Then, place the suction port 7 on the surface to be cleaned.
You can move it to clean it.

However, while cleaning, there is an obstacle such as a chair, and when I want to move it to the side, I should just turn off the hand switch 8, but it's a pain, so I leave the hand switch 8 on. The drawback was that the electric blower continued to run even though the room was not vacuumed, consuming electricity, resulting in wasted energy.

Alternatively, cleaning a flat surface such as a floor does not require as much suction power as cleaning an uneven surface such as a carpet, but the electric blower 2 that does not have speed switching does not require as much suction power as it does to clean an uneven surface such as a carpet. This method also has a drawback in that it requires cleaning a flat surface such as a floor, resulting in unnecessary power consumption.

The present invention aims to solve the above-mentioned problems, and embodiments thereof will be described below with reference to the accompanying drawings.

In FIG. 3, an electric blower 11 and a bidirectional thyristor 12 are connected in series to a power source, and a trigger element 13 is connected to the gate of the electric blower 11, and a trigger element 13 is connected in parallel to the bidirectional thyristor 12, and a capacitor 14 and a pressure sensor made of conductive rubber are connected in series. Resistance element 15 is capacitor 1
4 and the pressure-resistance element 15, one end of the trigger element is connected to the connection portion of the trigger element 4 and the pressure-resistance element 15, respectively. Note that this pressure-resistance element 15 may be connected to the other end of the electric blower 11 as shown by the broken line. The pressure-resistance element 15 is installed at the connection between the hose and the extension pipe, and its structure is, for example, as shown in FIG. A pressure-resistance element 15 made of conductive rubber is further provided with a pressure plate 18, a spring 19,
A pressure plate 20 is provided, and a part of the pressure plate 20 is exposed to the outside. The electrodes 17 are each guided to the vacuum cleaner body through the inside of the hose, forming a circuit as shown in FIG.

In order to clean the above configuration, pipe 1
6, a pressing force acts on the pressure plate 20, this force acts on the pressure plate 18 via the spring 19, and presses the pressure-resistance element 15 strongly against the electrode 17. Therefore, the resistance value of the pressure-resistance element 15 decreases,
Through this, a current is charged to the capacitor 14, and when the potential of the capacitor 14 exceeds the trigger potential of the trigger element 13, the bidirectional thyristor 12 is triggered, current flows to the electric blower 11, and the vacuum cleaner starts suctioning. When the pipe 16 is removed in order to remove an obstacle such as a chair, the pressure applied to the pressure-resistance element 15 decreases and the resistance value increases, so the charging current to the capacitor 14 decreases and becomes insufficient to trigger the trigger element 13. The potential is not reached, the bidirectional thyristor 12 is not turned on, and the electric blower 11 is stopped. When an obstacle such as a chair is removed and the pipe 16 is grasped again, the electric blower 11 rotates as described above and cleaning can be performed.

In addition, the internal resistance of the pressure-resistance element 15 decreases as the pressure increases, so for example, when cleaning a carpet, etc., it takes force to move the suction port, so the force gripping the pipe 16 becomes stronger. , the pressure applied to the pressure-resistance element 15 through the pressure plate 20, spring 19, and pressure plate 18 also increases naturally, and the resistance value decreases, causing the bidirectional thyristor 1
The conduction angle of No. 2 increases, the power of the electric blower 11 increases, and the suction force automatically increases. On the other hand, when cleaning a flat surface such as a floor, the suction port 7 moves lightly, so the force that grips the pipe 16 becomes weaker, and contrary to the above, the internal resistance of the pressure-resistance element 15 increases, and the electric blower 11 power is reduced, allowing you to obtain suction power tailored to the surface being cleaned.

Although the configuration of the variable resistance section is shown in FIG. 4, it is not necessarily as shown in FIG. Any structure may be used as long as the resistance is reduced.

In this way, according to the present invention, not only can power be cut when unnecessary, but also the suction force can be obtained depending on the grip strength of the hand holding the pipe, making it extremely easy to use. It can be made easy to operate.

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram of a conventional vacuum cleaner, Fig. 2 is a circuit diagram thereof, Fig. 3 is a circuit diagram of an embodiment of the present invention, and Fig. 4 is a sectional view of a variable resistance switch section. . 11... Electric blower, 12... Semiconductor control element (bidirectional thyristor), 13... Trigger element,
14... Capacitor, 15... Pressure-resistance element, 16... Pipe.

Claims (1)

[Claims] 1. An electric blower and a semiconductor control element are connected in series to a power source, a trigger element is attached to the gate of the semiconductor control element, and a capacitor is attached to the other end of the trigger element, so that the resistance changes depending on the applied pressure. A vacuum cleaner characterized in that a control circuit consisting of a pressure-resistance element is connected to each other, and the pressure-resistance element is provided in a hand-held pipe between a hose and an extension pipe.