JPS6127567Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a device that sounds a horn when a lot of dust accumulates in the dust collection box and the suction power decreases, and the loudness of the horn can be changed according to the user's preference. The purpose is to provide a vacuum cleaner that can.

Conventionally, vacuum cleaners have been proposed to sound a horn to notify when the dust collection box is full of dust, or to prevent excessive temperature rise due to extremely low suction air volume due to abnormal use. However, there was a drawback that the volume of the sound could not be adjusted depending on the user's preference and the place of use.

The present invention is intended to eliminate the above-mentioned drawbacks of the conventional technology, and embodiments thereof will be described below with reference to FIGS. 1 and 2.

FIG. 1 is a vacuum cleaner according to the present invention, and FIG. 2 is a sectional view taken along line AA of the vacuum cleaner shown in FIG.

In FIGS. 1 and 2, reference numeral 1 denotes a main body case that houses an electric fan 2 and holds a dust collection box 3 in a detachable manner. A pressure-operated valve 8 is constituted by the throttle gasket 4, the valve 5, the compression coil spring 6, and the guide frame 7. 9
is a cylindrical body that has a diaphragm A10 and a diaphragm B11 on its side, communicates between an outside air communication hole 12 and a throttle packing 4, and has a throttle valve 14 rotatably attached to an air inlet 13 with a shaft 15. A knob 16 is provided on the throttle valve 14 so that the amount of throttle of the air inlet 13 can be adjusted from the outside. Reference numeral 17 denotes a communication hole that communicates with the electric fan 2 through the ventilation hole 18 .

In the above configuration, when there is not much dust accumulated and the pressure difference P between the suction side pressure of the electric fan 2 and the atmospheric pressure is not large, the valve 5 of the pressure-operated valve 8 is moved by the biasing force of the compression coil spring 6. is in close contact with the throttle gasket 4, and the cylinder body 9 side and the flow hole 17 are blocked, but when the pressure difference P becomes large due to the accumulation of dust, etc., the valve 5 will eventually be moved by the force due to the pressure difference P to the compression coil spring. Exceeding the urging force of 6,
It is pushed down, and a flow path is created in which outside air flows in from the outside air communication hole 12 and flows to the electric fan 2 through the air inlet 13, the air suction port 13a, the throttle seal 4, the circulation hole 17, and the ventilation hole 18. As air flows through the cylinder 9 and air flows into the gaps between the diaphragm A10 and the diaphragm B11 and the cylinder 9, the diaphragm A1
0 and the diaphragm B11 vibrate at their respective natural frequencies, and if the difference between them is small, a beat is produced, resulting in a tone that is very easy to hear. Throttle valve 14 by knob 16
The diaphragm A can be rotated and the opening amount of the air inlet 13 can be adjusted.
10. The amount of air flowing through the gap between the diaphragm B11 and the cylindrical body increases, and the amplitudes of the diaphragm A10 and the diaphragm B11 increase, so the vibration noise becomes louder. Cylindrical body 9
By adjusting the inner diameter of the throttle valve 14 and the shape of the throttle valve 14, it is possible to not only simply adjust the volume of the sound, but also to have the function of adjusting the volume of the sound from the level of the volume to the level of eliminating the sound.

As described above, according to the present invention, when the suction air volume becomes extremely low due to full accumulation of garbage or abnormal usage, the horn automatically sounds in accordance with the magnitude of the suction air volume. A great effect is that the user can passively adjust the size according to the condition and preference, such as making it smaller in places where there are sick people or making it bigger in noisy places.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a vacuum cleaner according to the present invention;
FIG. 2 is a sectional view taken along line AA of the vacuum cleaner shown in FIG. 1...Main case, 2...Electric fan, 3...
Dust collection box, 6... Spring, 8... Pressure operated valve, 9...
Cylindrical body, 10, 11... Vibration plate, 12, 13, 18
... Ventilation hole, 14 ... Throttle valve, 16 ... Knob.

Claims (1)

[Scope of claim for utility model registration] (1) A pressure-operated valve whose air outlet communicates with the suction side of an electric fan and which automatically changes the air flow rate depending on the air volume or pressure, and one or more sound generators. The cylinder has an air inlet at one end and an air outlet at the other end. A vacuum cleaner, characterized in that the air inflow port of the cylindrical body is connected to a suction side and is provided with a passive air inflow amount adjusting means. (2) The scope of the utility model registration claim, characterized in that the air inflow amount adjusting means is constituted by a throttle valve that is linked to a knob exposed on the main body of the vacuum cleaner.
The vacuum cleaner described in (1).