JPH01305918A - Electric cleaner - Google Patents

Abstract

PURPOSE:To permit the illumination free from flicker and eliminate the discomfortable feeling of a user by driving a plurality of luminous elements which represent the drive state of a rotary brush by a dc power source having each nearly constant value of electric current and voltage. CONSTITUTION:Diodes 17 and 18, smoothing condenses 19 and 20, luminous elements 6a and 6b, resistances 21 and 22 for restricting electric current and connected in parallel from the both edges of a rush current suppressing resistance 16 on the start of a motor. When a power source is connected, and a hose switch 7 is turned to the (a) side, a motor 5 is driven in full power by the ac power source, and a rotary brush 11 is revolved. At this time, the luminous elements 6a and 6b illuminate through the diodes 17 and 18. When the switch 7 is turned to the (b) side, the motor 5 is driven by a half-wave rectification power source, and only the luminous element 6a illuminates because of the same polarity to that of a diode 14. In any case, the voltage and the electric current can be kept at each nearly constant value by the connection of the condensers 19 and 20 or only 19, and the flicker of the luminous element is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a vacuum cleaner having a function of forcibly capturing dust adhering to a floor surface such as a vacuum cleaner by rotating a rotary brush. In more detail,
The present invention relates to a vacuum cleaner including a plurality of light emitting elements that display the driving state of the rotary brush.

[Conventional technology]

It is equipped with a dust suction unit that receives power from the vacuum cleaner body through a hose with built-in electric wires and an extension tube, and that variably rotates a rotary brush by driving a motor. A vacuum cleaner has previously been proposed in which a dust suction unit is equipped with a plurality of light emitting elements that display a lock, etc.).

Among the light-emitting elements used for the above-mentioned purposes, filament lamps can be driven by AC power, but the filament wires of these filament lamps are easily cut off by external vibrations and shocks, making them unable to emit light. There are some easy difficulties.

Under these circumstances, LEDs, which are resistant to external vibrations and shocks, are being used in place of the filament lamps.

Conventionally, in a vacuum cleaner that uses a DC-driven LED as a light emitting element to display the driving state of a rotary brush, the LED is caused to emit light for only half a cycle by a half-wave rectified power source in an AC outlet. I have to.

Note that a prior art related to a vacuum cleaner equipped with a rotary brush that forcibly captures dust adhering to a floor surface such as a vacuum cleaner is described in, for example, Japanese Utility Model Publication No. 62-23429.

[Problem to be solved by the invention]

By the way, in a vacuum cleaner in which a dust suction unit is equipped with a plurality of light emitting elements that display the driving state of a rotary brush, an LED driven by direct current is used as the light emitting element, and this LED is connected to a half-wave rectified power supply of an AC circuit. If the LED is made to emit light for only half a cycle, the LED will emit light 50 or 60 times per second depending on the frequency band.
It repeats extinguishing, and this repetition of emitting and extinguishing occurs when the dust suction unit equipped with the LED is stationary.
To the human eye, it appears to continue emitting light. However, when I was constantly moving the dust suction unit while the vacuum cleaner was running, I noticed a flicker of a single light emitting light, so I couldn't see it.
However, there is a problem in that the user who focuses on the dust suction unit feels uncomfortable, and an improvement in this point has been desired.

An object of the present invention is to provide a dust suction unit with a plurality of light emitting elements that display the driving state of a rotary brush, not only when the dust suction unit is stationary, but also when the vacuum cleaner is in operation.
Even when the user's viewpoint is focused on the constantly moving dust suction unit, the light emitting element can emit light without flickering, making it easier to see than before and causing no discomfort to the user. Our goal is to provide vacuum cleaners.

[Means to solve the problem]

The purpose is to provide a dust suction unit with a built-in rotary brush that receives power supply from the vacuum cleaner body and further through a hose and an extension tube with built-in electric wires, and that has a built-in rotary brush that is variably rotated by a motor drive. This is achieved by configuring a vacuum cleaner in which a dust suction unit is equipped with a plurality of light emitting elements that display the status so that the light emitting elements are driven by a DC power source whose current and voltage are approximately constant.

[Effect]

According to the present invention having the above configuration, in the vacuum cleaner in which the dust suction unit is equipped with a plurality of light emitting elements that display the driving state of the rotary brush, the light emitting elements are connected to a DC power source whose current and voltage are approximately constant. By being configured to be driven by can be emitted without flickering.

〔Example〕

Hereinafter, the present invention will be described based on the drawings. FIG. 2 is a perspective view showing the overall configuration of a vacuum cleaner.

In Fig. 3, 1 is the main body of the vacuum cleaner, 2 and 3 are hoses and extension tubes with built-in electric wires, and 4 is a dust suction unit with a built-in motor and rotary brush, which will be described later. A light emitting element 6 is provided. The dust suction unit 4 is connected to a hose 2 from the vacuum cleaner body 1. Power is supplied through the extension pipe 3, and the hose 2
By turning on the hand switch 7 and driving the motor 5, a predetermined light emitting element 6 emits light.

FIG. 3 is an explanatory diagram of the internal structure of the dust suction unit 4 shown by arrow A in FIG. It is rotationally driven by motor 5 via 10. 12 is a printed circuit board on which a light emitting element 6 and the like are mounted, and the light emitting element 6 is arranged so as to be seen from the top surface of the dust suction unit 4.

FIG. 1 is a drive circuit diagram of a dust suction unit showing an embodiment of a vacuum cleaner according to the present invention, in which 13 is an AC power supply, 7 is the above-mentioned hose hand switch, and the hose hand switch 7
performs a switching operation so that the motor 5 is driven by either the AC power source a side or the half-wave rectified power source side.

14 is a diode, 15 is a positive characteristic thermistor for overcurrent prevention, and 16 is an inrush current suppression resistor when starting the motor. Current limiting resistors 21 and 22 are connected in antiparallel as shown.

In the above configuration, when the vacuum cleaner body 1 is powered on and the hose hand switch 7 is set to the a side, the motor 5 is driven at full power by the AC power source, and the rotary brush 11
rotates. At this time, the light emitting elements 6a and 6b both emit light through the diodes 17 and 18. Also, at this time, due to the connection of the smoothing capacitors 19 and 20, there is no time when the voltage and current become O, and the voltage and current are kept almost constant.

Therefore, the light emitting elements 6a and 6b do not flicker.

Next, when the switch 7 is set to the b side, the motor 5 is driven by a half-wave rectified power supply, and both the rotation speed and torque are decreased, and the light emitting element 6a emits light because it has the same polarity as the diode 14. , the light emitting element 6b does not emit light because its polarity is opposite to that of the diode 14. At this time, since the voltage and current of the light emitting element 6a is kept almost constant by the connection of the smoothing capacitor 19 described above, the light emitting element 6a
No flickering occurs in a. Note that the light emitting element 6C, the diode 23, and the resistor 24 are connected in parallel to the PTC thermistor 15, and the resistance value R24 of the resistor 24 is very large compared to the normal resistance value RIP+ of the PTC thermistor 15. R24>R, 15), usually light emitting element 6c
does not emit light.

On the other hand, when an abnormally large current flows through the circuit due to motor lock, the resistance of the PTC thermistor exhibits a much larger value than normal, and the large current is cut off to protect the motor 5. At this time, the resistance value R24 of the resistor 24 and the resistance value R15 of the positive temperature coefficient thermistor 15 satisfy R24<RlB, so the light emitting element 6c emits light through the diode 23. and.

At this time, since the voltage and current of the light emitting element 6C is kept substantially constant by the connection of the smoothing capacitor 25, the light emitting element 6c does not flicker. Note that the resistance values of the current limiting resistors 21 and 22 described above are much larger than the inrush current suppressing resistor 16 at the time of motor startup, so when the positive temperature coefficient thermistor 1-5 interrupts the circuit, Most of the small current flowing through the light emitting element 6c flows to the inrush current suppressing resistor 16 side, so the light emitting element 6c
a +' 6 b does not emit light.

〔Effect of the invention〕

The present invention is as described above, and as is clear from the description of the illustrated embodiments, according to the present invention, in a vacuum cleaner in which the dust suction unit is provided with a plurality of light emitting elements that display the driving state of the rotary brush, By configuring the light emitting element to be driven by a DC power source with a substantially constant current and voltage, the user can easily touch the constantly moving dust suction unit not only when the dust suction unit is stationary but also when the vacuum cleaner is in operation. To provide a vacuum cleaner that can cause a light emitting element to emit light without flickering even when the viewpoint is concentrated, is easier to see than before, and does not give discomfort to a user.

[Brief explanation of the drawing]

Fig. 1 is a drive circuit diagram of a dust suction unit showing an embodiment of the vacuum cleaner according to the present invention, Fig. 2 is a perspective view showing the overall configuration of the vacuum cleaner, and Fig. 3 is indicated by arrow A in Fig. 2. FIG. 2 is an explanatory diagram of the internal structure of the dust suction unit shown in FIG. 1...Vacuum cleaner body, 2...Hose, 3...Extension pipe,
4... Rotary brush, 5... Motor, 6 (6
a-6c)...Light emitting element, 19.20 and 25...
・Smoothing capacitor.

Claims (1)

[Claims] 1. Comprising a vacuum cleaner body and a dust suction unit with a built-in rotary brush that receives power supply from the vacuum cleaner body via a hose with a built-in electric wire and an extension tube, and rotates variably by a motor drive, and drives the rotary brush. 1. A vacuum cleaner in which a dust suction unit is provided with a plurality of light emitting elements for displaying a status, characterized in that the light emitting elements are driven by a DC power source whose current and voltage are approximately constant.