JPS6223428Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a vacuum cleaner that has a lamp that illuminates the surface to be cleaned, and that uses a diode to switch the rotational speed of an electric blower to high or low strength. The purpose is to extend the life of the lamp without changing the lamp life. In conventional vacuum cleaners with lamps that illuminate the surface to be cleaned, the lamp is often connected directly to the input power source, so the lamp is 100V or 200V.
The one for which it was intended was used. These lamps were also small enough to be built into vacuum cleaners. Therefore, since the input voltage is high for a small lamp, it is necessary to make the filament thin and long, which has the drawback that the filament resonates due to vibrations during cleaning or vibrations from an electric blower, and easily breaks. Therefore, in some cases, a tap for changing the speed of an electric blower is used to lower the voltage to about 10 to 30V and a lamp is connected to it, but if the voltage is too strong, it cannot be used as a power source for the lamp due to electromagnetic induction caused by the field. Only the potential difference is applied. And since the dielectric constant of the field is small, when a strong switch is made, the brightness becomes darker than a weak one. I found it very strange that the brightness of the lamp was dim when it was set to high, which is often used, and since I had to select a lamp suitable for low, it was not bright enough for cleaning when it was set to high.

The present invention solves the above-mentioned drawbacks, and embodiments thereof will be described below with reference to the drawings.

In Figures 1 to 3, reference numeral 1 denotes a suction port with a built-in rotating brush 2 on the front for removing dust attached to the hair of carpets, etc., and a back plate 1a with an intake port 3 on the lower front. A front wheel 4 is provided at the rear of the back plate 1a. Reference numeral 5 denotes a vacuum cleaner main body which includes an electric blower 6 in the lower part and a dust bag 7 in the upper part, and is rotatably connected to the suction port 1 and a shaft 8. Reference numeral 9 denotes a handle for operating the cleaner body 5 back and forth, and is attached to the cleaner body 5 with screws 10. 11 is a rotating shaft taken out from the electric blower 6, and the rotating brush 2 is connected to the belt 12.
Drive through. 13 is a hose that introduces dust from the intake port 3 into the dust bag 7; 14 is a vacuum cleaner body 5;
15 is a switch for opening and closing the power supply, and 16 is a handle attached to the handle 9. Further, 17 is a window with a built-in lamp 18 for illuminating the floor surface. Reference numeral 19 denotes a switch for switching the speed of the electric blower 6 between high and low speeds, and when connected to a diode 20, this diode 20
Due to the half-wave rectification, the electric blower 6 operates at a low speed. Further, the lamp 18 is connected in series with a diode 21 to the electric blower field coil tap and coil end, and the diode 20 and the diode 21 have the same polarity. Therefore,
A half-wave rectified potential is applied to the lamp 18. Also, when the changeover switch 19 is switched to the strong position and the power source 22 is connected directly to the electric blower 6, a potential half-wave rectified by the diode 21 is applied to the lamp 18. Therefore, the brightness of the lamp 18 remains constant whether it is set to high or low. Also, since the lamp 18 is powered from the field coil tap, it can be lowered to about 10 to 30V, which allows the filament to be made thicker and shorter.

As described above, according to the present invention, the filament does not easily break due to the vibrations of the actual use of the vacuum cleaner or the vibrations of the electric blower, so it can maintain a long life, and the lamp remains bright even when the electric blower is switched between high and low. Regardless, its practical value is great.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a vacuum cleaner according to an embodiment of the present invention, FIG. 2 is a partially cutaway sectional view of the vacuum cleaner, and FIG. 3 is a circuit diagram. 6...Electric blower, 18...Lamp, 19...
Changeover switch, 20, 21...diode.

Claims (1)

[Scope of utility model registration request] A switch for switching between the high-speed circuit and the low-speed circuit of the electric blower, a diode connected to the low-speed circuit, and another diode other than the above are connected in series, and one end is connected to the tap of the electric blower field coil, and the other end is connected to the tap of the electric blower field coil. A vacuum cleaner comprising a lamp connected to a high-speed circuit and a lamp connected to a low-speed circuit, respectively, and the two diodes have the same polarity.