JPS587288B2 - vacuum cleaner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vacuum cleaner equipped with a primary filter and a secondary filter.

Most modern vacuum cleaners use a primary filter and a secondary filter to separately filter and collect coarse and fine dust.

Although it is normal technology to install a dust removal device on the side of the secondary filter, when we analyze the actual state of dust collection, we find that the coarse dust, which is like cotton dust, forms a layer on the outside of the primary filter and causes a surprisingly large ventilation resistance. It has been found that in order to maintain the dust suction power at a high level, it is necessary to remove the coarse dust layer on the outer surface of the primary filter as well.

The structure for accomplishing these tasks was developed in 1973.
It has been proposed in Japanese Utility Model Publication No. 27776, Japanese Utility Model Publication No. 48-42758, etc.

However, in the vacuum cleaner described in Japanese Utility Model Publication No. 48-27776, both the primary filter and the secondary filter are molded into the shape of a juicer's centrifugal cage, and are rotated at high speed. This method not only requires a major change in the form of the vacuum cleaner, but also involves many solutions such as filter support, sealing, and filter wear prevention. There is a problem, particularly on the secondary filter side, that fine dust tends to be pushed into the filter holes by centrifugal force.

In addition, the method described in Japanese Utility Model Publication No. 48-42758 uses a brush to scrub the primary filter from the inside, that is, from the side where there is no dust layer, and if you want to truly remove the dust layer, you need to make the filter mesh coarser. At the same time, it is necessary to forcefully press the brush to push the tip of the brush into the eye of the filter, which can result in too much dust passing through the primary filter, and the filter and brush may be severely damaged or worn out. It contained problems.

The present invention has been made in order to solve the problems of the conventional structure, and is to provide a device that can effectively remove coarse dust from the secondary filter and at the same time without damaging the primary filter, in the form of an actual vacuum cleaner. It is intended to be obtained in a form that is compatible with the following.

An embodiment of the present invention will be described below with reference to the drawings.

The vacuum cleaner main body 1 is divided into a dust collection case 2 and a blower case 3, the front and rear parts, and the engaging parts 4 and 5 at the lower ends of both cases are engaged with each other. By engaging the clamp hook 6 with the upper end of the blower case 3, both cases are connected to form a main body.

The dust collecting case 2 has a handle 7 on the upper surface and a free front wheel 8 on the lower surface, and the blower case 3 has a handle 9 on the upper surface and one rear wheel 10 on each side of the lower part.

As shown in FIG. 2, the dust collection case 2 has a bottomed cylindrical shape with most of its cross section being a cylindrical wall.

A hose connection port 12 having a check valve 11 inside is provided on the front surface of the dust collection case 2, and a filter device 14 is fitted into a rear opening 13 connected to the blower case 3.

Reference numeral 15 designates a substrate of the filter device 14, which is surrounded by a sealing member 16 that is in close contact with both the inner surface of the dust collection case 2 and the front surface of the blower case 3.

A horizontal bearing part 1T is formed in the center of the substrate 15, and a rotating shaft 19 having a large gear 18 at the rear end is pivotally supported by this.

20 is a secondary filter cylinder that is non-rotatably connected to the rotating shaft 19.

The secondary filter tube 20 is made by sandwiching a secondary filter 2'3 made of a non-woven fabric cured by resin processing and pleated to have a chrysanthemum cross section between the front and rear end plates 21 and 22. The donut-shaped rear end plate 22 is connected to the annular projecting wall 24 of the base plate 15.
By fixing the front end plate 21 to the front end male threaded portion 25 of the rotating shaft 19 with a nut 26, the front end plate 21 is supported so as to rotate together with the rotating shaft 19.

An annular sealing member 27 that contacts the front surface of the substrate 15 is attached to the rear end plate 22 .

Further, a plurality of ventilation holes 28 are formed between the bearing portion 17 of the base plate 15 and the annular projecting wall 24 to communicate with the inside of the secondary filter cylinder 20.

A plurality of ventilation holes 29 are also formed in the large gear 18.

30 is a primary filter cylinder arranged outside the secondary filter cylinder 20.

The primary filter cylinder 30 has a plurality of windows provided on the outer periphery of a cylindrical frame part 31 with a closed front end, and a coarse mesh primary filter 32 is placed therein. It is rotatably fitted into the wall 33 and has a rotating shaft 19 at the center of the front end.
By rotatably inserting the tip of the rotating shaft 19
It is supported so that it can rotate independently of the

In order to prevent the primary filter cylinder 30 from coming off, the rotating shaft 19
A retaining ring 34 is fitted to the tip of the retainer ring 34.

Reference numeral 35 denotes an annular cover coupled to the substrate 15 via a sealing member 16, and a sealing member 36 that contacts the outer periphery of the primary filter cylinder 30 is attached to the inner peripheral edge of the annular cover.

The sealing member 36 comes into contact with a portion outside the primary filter 32.

A gear shaft 37 is rotatably supported by the upper horizontal bearing portion 38 of the base plate 15, and has gears 39 and 40 that rotate integrally at the front and rear.

The gear 39 meshes with the gear portion 41 of the primary filter cylinder 30, and the gear 40 meshes with the dog gear 18 of the rotating shaft 19.

Since the ratio of the number of teeth between the gear 39 and the gear portion 41 is set to be much larger than the ratio of the number of teeth between the gear 40 and the canine gear 18, the rotation of the secondary filtration cylinder 20 is larger than that of the gear shaft 37. It will rotate much more than the primary filter cylinder 30.

The gear shaft 37 is coupled to a coupling 43 exposed on the front surface of the blower case 3 by a claw 42 protruding from the rear surface of the gear 40.

The coupling 43 is connected to a cord reel (not shown) built into the blower case 3, and transmits the rotation of the cord reel as the cord is taken in and out to the gear shaft 37 at increased speed.

Reference numeral 44 denotes an elastic plate-shaped dust removing body fixed to the lower surface of the bearing part 17, the tip of which is shallowly engaged between the folds of the secondary filter 23, and when the secondary filter cylinder 20 rotates, the secondary filter is removed. The 23 folds are flicked one after another to cause dust adhering to the surface to fall by vibration.

An opening 45 is provided in a part of the primary filter cylinder 30 for letting out the dust that has fallen from the secondary filter 23.

As seen in FIG. 2, on the bottom surface of the dust collection case 2, there are a pair of vertical walls 46 and 47 that extend to a height that almost touches the outer periphery of the primary filter cylinder 30, and are integral with the case and parallel to the axis of the case. It is formed to protrude so as to extend, and a dust storage space 48 is formed therebetween.

The front part of the vertical wall 46, 47 continues to the front wall 49 of the dust collection case 2, and the rear part is connected to the cover 35 and the sealing member 36 of the board 15.
．． 16.

A curved horizontal wall 50 having the same curvature as the primary filter cylinder 30 closes off the portion where the vertical walls 46, 47 separate from the primary filter cylinder 30.

Thus, the vertical wall 47 serves as a coarse dust scraping wall for scraping off the dust layer from the outer surface of the primary filter 32.

Additionally, a seal member 3 is attached to the outer surface of the primary filter cylinder 30 from the front end of the cylinder.
A press plate 51 having a length up to just before 6 is integrally formed.

Next, the effect will be explained.

First, the dust collection case 2 is removed from the hose connection port 12 by dust collection work.
Of the dust that has flowed into the filter, coarse dust is filtered by the primary filter 32 of the primary filter cylinder 30, and fine dust that has passed through the primary filter 32 is filtered by the secondary filter 23 of the secondary filter cylinder 20.

Now, before and after cleaning, there is an operation to insert and remove the cord.

When the cord is completely wound up, the press plate 51 of the primary filter cylinder 30 is located at the position indicated by the imaginary line in FIG.

The opening 45 is also located outside the dust storage space 48.

As you pull out the cord, the cord reel rotates on gear shaft 3.
7, and the primary filter cylinder 30 and the secondary filter cylinder 20 perform the second filter at different angular velocities due to the difference in the transmission tooth number ratio as described above.
Rotate in the direction of the dashed arrow in the figure.

When the cord is fully pulled out, the primary filter cylinder 30 rotates around the axis by an angle θ, and the opening 45 coincides with the dust storage space 48.

The secondary filter tube 20 rotates one or more times, and at this time, due to the dust removing action performed by the dust remover 44, the dust adhering to the surface of the secondary filter tube 23 falls from the opening 45 into the dust storage space 48.

Here, even more dust is accumulated in the arc-shaped space extending from the upper surface of the press plate 51 to the coarse dust scraping wall 47 during the dust suction work.

When the cord is wound up after cleaning, the primary and secondary filter tubes 3
0. 20 is now rotated in the direction of the solid arrow.

Then, the coarse dust layer adhering to the outer surface of the primary filter 32 within the range indicated by A in FIG.
7, the outer surface of the primary filter 32 becomes clean.

This is the same as the angle θ in range A.

Dust removal from the secondary filter 23 is also performed at this time.

As the opening 45 gradually moves upward, some of the falling fine dust will stay inside the primary filter cylinder 30.
It is dropped into the dust collection space 48 the next time the cord is pulled out.

By separating the dust collection case 2 from the blower case 3 and removing it from the filter device, both coarse and fine dust can be thrown away at the same time.

When the amount of coarse dust in the dust collection case 2 becomes extremely large, the press plate 51 functions to compress and compact the coarse dust between it and the coarse dust scraping wall 47.

In this embodiment, the dust removing body 44 is designed to directly repel the folds of the secondary filter 23 to generate repelling vibrations.
A separate plate may be inserted between the folds of the filter, and this plate may be repelled to indirectly apply repellent vibration to the filter.

As described above, the present invention connects a dust collection case with a filter device removably fitted to the rear opening to the front surface of a blower case, in which the primary filter and the secondary filter constituting the filter device are used as a power source. The secondary filter is combined with a dust removal body that repels and vibrates the filter, and a rough dust removal wall is provided on the inner surface of the dust collection case so as to be close to or in contact with the surface of the primary filter. The fine dust attached to the secondary filter is removed by repelling vibration by the dust remover, and coarse dust such as cotton waste attached to the surface of the primary filter is layered, so the layer is removed. If even a part of the dust layer is caught by the scraping wall, the coarse dust layer adhering to the surface of the primary filter will be peeled off. Therefore, the coarse dust scraping wall does not have to cover the entire surface of the primary filter to reliably scrape it off. This eliminates the cause of clogging of both filters at once, and maintains high dust suction capacity over a long period of time.

Furthermore, since the present invention removes fine dust and coarse dust by rotating the filter, it does not matter whether the type of vacuum cleaner is vertical or horizontal, and the filter shape is flat or cylindrical. Dust can be dropped from a wide range of filter surfaces regardless of the size.

Furthermore, in this method, the member for scraping off coarse dust from the outer surface of the primary filter is provided on the dust collection case rather than on the filter device side, so there is no catching part on the surface of the filter device that can catch coarse dust. This eliminates inconveniences such as coarse dust being dragged out and staining the floor when the filter device is removed to dispose of dust, or dust getting entangled in the filter device and requiring time and effort to remove it. It is something.

[Brief explanation of drawings]

The drawings show an embodiment of the vacuum cleaner of the present invention, in which FIG. 1 is a partially sectional side view, and FIG. 2 is a sectional view taken along the line -■ in FIG. 1. 3... Blower case, 2... Dust collection case, 13... Rear opening, 14... Filter device, 32... Primary filter, 23
...Secondary filter, 44...Dust removal body, 47...Coarse dust removal wall.

Claims (1)

[Scope of Claims] 1. A dust collection case in which a filter device is removably fitted in a rear opening is coupled to the front surface of a blower case, in which a primary filter and a secondary filter constituting the filter device are powered by a power source. At the same time, the secondary filter is combined with a dust removal body that repels and vibrates the filter, and a coarse dust removal wall is protruded on the inner surface of the dust collection case so as to be close to or in contact with the surface of the primary filter. A vacuum cleaner that is installed. 2. The vacuum cleaner according to claim 1, wherein a dust collecting space is formed between the coarse dust scraping wall and the inner surface of the dust collection case. 3. The vacuum cleaner according to claim 1, wherein the coarse dust scraping wall protrudes from the lower surface of the dust collection case.