JPS5822217B2 - Vacuum cleaner dust collection display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dust collection amount display device for a vacuum cleaner that not only displays the amount of collected dust but also functions as a safety device to flow air to an electric blower in the event that the filter becomes clogged. The purpose is to make the movement of the pointer smooth.

. The following examples will be explained with reference to the drawings: 1
2 is a vacuum cleaner body, 2 is an electric blower, 3 is a filter, and 4 is a dust collection chamber lid.

5 is a dust collection meter box recessed in the dust collection chamber lid 4; 6 is a transparent window plate that closes the upper opening of the meter box 5; 7 is a display plate that suppresses and fixes the window plate 6; Two through holes 8° 9 are provided in two parts that do not face each other to communicate between the atmosphere and the inside of the dust collecting meter box 5.

10 is a positive pressure part 11 that communicates the inside of the dust collection meter box 5 with the atmosphere.
and a negative pressure part 12 that communicates with the inside of the vacuum cleaner body.The part closer to one end is pivoted on a pin 13 so as to be rotatable, and the opposite part 1 about this pivot part is pivoted on a pin 13.
4 is a positive pressure part 11 and a negative pressure part 1 in the dust collection meter box 5.
This is a valve plate that opens and closes the passage 15 between the two.

The pointer 10 is biased by a helical spring 16 so that the valve plate 14 closes the passage 15.

Further, the positive pressure section 11 in the dust collection meter box 5 is connected to a partition wall 17.
It is partitioned into a pointer side 1'la and a valve plate side 11b.

In addition, 18 in the figure is provided in the negative pressure part 12 in the meter box,
Suction side of electric blower 2 and filter 3 inside vacuum cleaner body 1
The intake holes 19 and 20 that communicate with the pointer 10 and the valve plate 14 are arcuate guide walls that face the tips of the pointer 10 and the valve plate 14, and are designed to have a minimum clearance that does not hinder the rotation of the pointer 10 and the valve plate 14. It is designed to be located at a distance.

In the above configuration, when the filter 3 of the vacuum cleaner becomes clogged with dust, the negative pressure on the intake side within the vacuum cleaner body 1 gradually increases.

Then, due to the pressure difference between the negative pressure on the intake side and the positive pressure on the atmospheric side, the pointer 10 moves to a point where it balances the force of the helical spring 16, and the amount of collected vehicles is displayed.

When more dust accumulates and the filter 3 becomes more clogged, the rotation angle of the pointer 10 increases, creating a gap between the valve plate 14 and the guide wall 20, and the positive pressure portion 1
1 atmosphere passes through the passage 15 to the intake hole 18 of the negative pressure section 12.
and acts as a safety valve.

At this time, the air flowing through the passage 15 to the negative pressure part 12 is separated by the partition wall 17 from the valve plate side positive pressure part 11b.
The air in the positive pressure portion 11a on the pointer side does not change at all, and the pressure on the atmospheric side that is applied to the pointer 10 is always stable and constant.

Therefore, the movement of the pointer 10 does not become unstable due to turbulence of the air in the portion 11a facing the pointer 10, and stable movement can always be obtained.

As described above, according to the present invention, the movement of the pointer becomes stable and smooth, and the display device can be easily viewed.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a dust collection amount display device for a vacuum cleaner according to an embodiment of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is an exploded perspective view thereof. 1...Vacuum cleaner body, 2...Electric blower, 3...Filter, 4...Dust collection chamber lid, 5...Collection Dust meter box, 6...Window plate,
10... Pointer, 11... Positive pressure part, l
la... Pointer side positive pressure part, 11b...
Valve plate side positive pressure part, 12... Negative pressure part, 14...
...Valve plate, 17...Partition wall.

Claims (1)

[Claims] 1. A dust collection meter box recessed in the vacuum cleaner body or a part of the dust collection chamber, a transparent window plate that closes the upper opening of this meter box, and a filter inside the vacuum cleaner body and a It is divided into a negative pressure part that communicates with the suction side of the blower and a positive pressure part that communicates with the atmosphere, and is equipped with a flat pointer with one end pivoted, and the pointer has a pivot point centered on the pointer. A valve plate is integrally provided on the opposite side of the meter box to open and close between the negative pressure part and the positive pressure part in the meter box, and the positive pressure part in the meter box is divided into the pointer side and the valve plate side by a partition wall. Divided vacuum cleaner dust collection display device.