JPS6137923B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vacuum cleaner that can compress dust in a dust box.

Conventionally, vacuum cleaners suck in dust along with air, pass it through a single filter or multiple stages of filters installed in series, separate the dust from the air, collect it in a dust box, and remove the dust. The air is configured to vent to the atmosphere.

The dust accumulated in the dust box is fluffy like cotton and occupies a relatively large volume as it is. Therefore, there are two possible ways to increase the dust storage capacity of a vacuum cleaner: increasing the volume of the dust box and compressing the dust. However, the former method not only increases the size of the vacuum cleaner, increases the material cost, but is also inconvenient to use. Therefore, a method of compressing dust is considered to be a good solution, but the reality is that there is currently no mechanism for compressing dust.

For example, the pre-filter is always biased toward the main filter by a spring, and when dust accumulates, the dust can be removed from the filter device by removing the dust collection box from the vacuum cleaner body and rotating the dust removal knob. A vacuum cleaner has been proposed in which a cam mechanism is activated to move the pre-filter forward and backward at the same time as the dust is removed, compressing the coarse dust pressed against the pre-filter forward (Japanese Patent Application Laid-Open No. 1983-1999).
(See Publication No. 101860). However, with this configuration, the coarse dust adhering to the prefilter must be manually compressed, and the dust box must be removed from the main body of the vacuum cleaner. It is quicker to discharge the dust to the outside, and therefore the dust compaction operation is not substantially performed.

The present invention allows the pre-filter, which is moving against the pressure of the spring due to the dust suction wind pressure, to return to its original position by the pressure of the spring at the same time as the dust suction stops. To provide a vacuum cleaner that automatically compresses dust and can collect a large amount of dust. Hereinafter, the present invention will be explained in detail with reference to the embodiments shown in the drawings.

In the figure, 1 is an upper body of the vacuum cleaner, 2 is a partition wall, and an electric blower 3 is held between the upper body 1 and the partition wall. The electric blower 3 is fixed to the upper main body 1 and the partition wall 2 via a lower support packing 4 formed of an elastic material such as rubber and an upper support packing 5, and the lower support packing 4 is connected to the partition wall 2 and the electric blower. 3 to maintain airtightness. 6 is a handle for carrying the vacuum cleaner, and the upper body 1
It is fixed with screws etc. 7 is an air suction hole provided in the partition wall 2. Reference numeral 8 denotes an exhaust port, which is constructed by fixing the upper main body 1 and the partition wall 2 to each other at a constant interval with screws or the like (not shown);
This is where the exhaust air from the electric blower is released into the atmosphere. A filter case packing 9 is attached to the flange of the filter case 10 and is made of an elastic material such as rubber.
0 and the partition wall 2 are kept airtight. The upper main body 1 to which the partition wall 2 is fixed is detachably attached to a dust box (lower main body) 11 with a buckle (not shown). Reference numeral 12 denotes an intake hole for introducing air containing dust from a dust suction hose into the dust box 11. Reference numeral 13 denotes a dust removal lever, and 14 denotes a main filter, which is constructed in a pleated shape using nonwoven fabric, filter paper, or the like. Reference numeral 15 denotes a filter support frame molded at the same time as the main filter 14, reference numeral 16 denotes a contact plate hermetically fixed to the filter support frame 15, and reference numeral 17 denotes packing, which is pressed into contact with the contact plate 16 and the filter case 10 to form a space between the two. It is kept airtight. The dust removal lever 13 is fixed to the filter frame 15 with screws 18, and when the dust removal lever 13 is rotated using the central cylindrical portion 19 of the filter case 10 as a bearing, the filter frame 15 can be rotated together. A support boss 20 is provided at the center of the filter frame 15.
is fixed by the screw 18. A coil spring 21 surrounds the support boss 20, and its one end is in pressure contact with the filter frame 15, and the other end is in pressure contact with the prefilter 22 which is slidably inserted into the support boss 20. Further, a collar is formed at the lower end of the support boss 20, and serves as a stopper for the prefilter 22. Reference numeral 23 denotes a frame integrally formed with the filter case 10, and a flexible net 2 similar to the prefilter 22 is provided at the lower end of the frame over the entire circumference.
It is equipped with 4. Further, this net body 24 is provided at a position within the stroke range of the prefilter 22. 25 is a dust removal spring whose base is connected to the cylindrical part 1
When the filter frame 15 is rotated by rotating the dust removal lever 13, an impact is applied to the filter 14 and the filter 1
Remove the dust from Step 4. 26 is a front wheel, and 27 is a rear wheel.

Next, the operation of this embodiment will be explained.

First, when the electric blower 3 is started, the air containing dust enters the dust box 11 through the dust suction hose (not shown) and the air intake hole 12, and is filtered through the prefilter 22 or the mesh 24. Dust is separated, and then fine dust is separated by the main filter 14, and the dust-removed air passes through the suction port 7 and is discharged into the atmosphere from the exhaust port 8 by the electric blower 3.

During the above operation, the dust separated by each filter is accumulated in the dust box, and some of the dust adheres to each filter. As the amount of dust gradually increases, the amount of dust adhering to the bottom surface of the prefilter 22 also increases, and as a result, the ventilation resistance increases, and as a result, force due to wind pressure is applied to the bottom surface of the prefilter 22. Then, the force gradually becomes larger than the stretching force of the coil spring 21, pushing the prefilter 22 upward. When the cleaning is completed and the intake air stops, the force due to wind pressure is released, and the prefilter 22 is pushed downward by the pressing force of the coil spring 21 and returns to its original position. While such a cycle is repeated, the amount of dust gradually increases, and a portion of its upper surface almost reaches the lower surface of the prefilter 22 at its stopping position. When the vacuum cleaner in this state is further used, more dust accumulates in the space below the prefilter 22, which has been raised by wind pressure, and is compressed by the prefilter 22, which returns to its original state at the same time as the electric blower stops. In this way, from now on, use the electric blower,
The effect is that the accumulated dust is automatically and repeatedly compressed every time the machine stops. Since the entire lower end of the frame 23 is made of a flexible net 24, the prefilter can slide freely.
As a result, the sliding stroke of the prefilter 22 becomes larger, which has the effect of increasing the amount of dust compression.

According to the present invention configured as described above, when the dust box is almost full of accumulated dust, it is automatically compressed each time it is used, so special operations and precautions are not required to compress the dust. This has the advantage that an electric vacuum cleaner that does not require a vacuum cleaner and that can collect several times more dust than conventional vacuum cleaners is obtained.

[Brief explanation of the drawing]

The figure is a longitudinal sectional view of a vacuum cleaner showing the configuration of an embodiment of the present invention. 11...Dust box, 14...Main filter, 21
... Spring, 22 ... Prefilter, 24 ... Net body.

Claims (1)

[Claims] 1. A main filter provided in the dust collection box, a pre-filter provided slidably by a certain distance in front of the main filter, and the pre-filter is biased in a direction against the flow of intake air. when the suction air pressure during dust suction becomes greater than the biasing force of the spring means, the prefilter moves in the flow direction of the suction air, and at the same time when dust suction is stopped, the prefilter returns to its original state due to the biasing force of the spring means. A vacuum cleaner characterized in that the dust accumulated in the dust collection box is automatically compressed by a pre-filter that returns to its position and moves back.