JPS5841901Y2 - Vacuum cleaner dust removal device - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a dust removal device for a vacuum cleaner.

In conventional vacuum cleaners, a pre-filter is placed in front of the filter to capture coarse dust, but this pre-filter generally has a means for removing attached dust. It is normal that it is not provided.

Therefore, the coarse dust captured by the pre-filter adheres to the surface of the pre-filter in a compressed state, increasing the ventilation resistance and reducing the dust suction ability. I had to remove the dust that had stuck to the surface.

In order to solve this problem, the pre-filter is rotated and the pre-filter is moved by relative movement with the dust accumulated in the crotch seat.
In this case, if there is a lot of dust on the crotch seat, this dust can be used to scrub off the dust attached to the pre-filter, but if there is a lot of dust on the crotch seat, This effect was not observed when only a small amount of dust had accumulated, and the dust remained attached to the pre-filter surface.

The present invention provides a dust removal device that removes dust attached to the pre-filter surface regardless of the amount of dust on the crotch seat, eliminates the above-mentioned complicated dust removal work, and maintains high dust suction ability over a long period of time. An embodiment of the present invention will be described below based on the drawings.

In the figure, 1 is the vacuum cleaner main body (hereinafter referred to as the main body);
2 is an electric blower built into the main body 1; 3 is a rear wheel; 4 is a front wheel; 5 is a crotch seat box that has a crotch seat portion 5a and is connected to the main body 1; 5' is a hose (not shown) Connection port for connecting 6
Reference numeral denotes a handle for transporting the crotch seat box 5, 7 a buckle for attaching and detaching the crotch seat box 5 from the main body 1, and 8 a support frame for supporting the tightening rubber 9 for tightening the crotch seat box 5 and the main body 1. The support frame 8 includes a bearing 8' that supports a rotating shaft 11 formed integrally with the frame 10' at the front of the main filter 10, and a bearing 8' that supports the main filter 10.
A dust removing body 13 is provided to repel one end of a diaphragm 12 inserted into a wall of 10.

8a is a ventilation hole formed in the support frame 8; 14 is the rotation shaft 1;
A large pulley 15 attached to the other end of the main body 1 is a small pulley that engages with the large pulley 14, and also has a claw portion 15' that engages with a clutch plate 16 on the main body 1 side.

17 is an interlocking shaft that transmits the rotation of a cord reel (not shown).

Reference numeral 18 denotes a dust-tight packing, which is inserted between the supporting frame 8 and a rib 10a protruding from the frame 10'' at the rear of the main filter 10 to maintain airtightness.

19 is a pre-filter that separates coarse dust from fine dust.

A backing 21 that is rotatably tight to the inner circumference of the pre-filter frame 20 is fitted onto the outer circumference of the pre-filter 19 .

The pre-filter 19 is the main filter 10.
The main filter 10 is fixed to the frame 10' and rotates together with the main filter 10.

Reference numeral 22 denotes a convex portion made of a part of the crotch box 5 that substantially contacts the front surface of the pre-filter 19.

In the above configuration, when the cord is pulled out, the rotation of the cord reel is transmitted to the large pulley 14 through the interlocking shaft 17, the main filter 10 rotates, and the blur filter 19 also rotates at the same time.

As a result, the coarse dust that adheres to the blur filter 19 and increases the ventilation resistance of the pre-filter 19 is removed by the protrusion 22 that protrudes from a part of the crotch box when the amount of dust in the crotch compartment is small. Moreover, when the amount of dust increases, the dust itself is removed by the relative movement with this dust.

At the same time, the fine dust attached to the entire circumference of the main filter 10 is also removed from the main filter 10 by hitting the diaphragm 12 inserted into the folds of the main filter 10 by the dust remover 13.

As described above, according to the present invention, the pre-filter is rotated and the convex portion is provided so that it almost contacts the pre-filter from a part of the crotch box, so the amount of dust in the crotch box is reduced. Even in this case, coarse dust adhering to the pre-filter surface rotates together with the pre-filter and is removed from the pre-filter by the convex portion.

The coarse dust removed by the convex part temporarily accumulates near the convex part, and then gradually protrudes from the convex part in an intertwined state.
Coarse dust adhering to the surface is removed by being scraped off.

The convex part does not need to extend all the way to the center of the pre-filter, and since the dust that grows due to the entanglement of the coarse dust itself contributes to dust removal, it is sufficient to have a fairly low convex part, as shown in Figures 1 and 5. The convex portion can be formed by the mounting seat of the seat box handle or the concave portion of the handle as shown in FIG. 7, and there is no need to provide any special ribs or protrusions.

Fig. 8 shows a design that utilizes the concave part in the design of the crotch seat box.

Since the pre-filter surface is cleaned each time dust is removed in this way, the relationship between the amount of crotch and the dust suction power (air volume) is as shown in Figure 9, where the amount of crotch is larger than that of the conventional filter. Also, there is little reduction in dust suction air volume, and strong dust suction power can be obtained over a long period of time.

In addition, since coarse dust on the surface of the pre-filter is removed regardless of the amount of dust, the area of the pre-filter is reduced, and instead of the conventional one that was provided not only on the front but also on the side, the front is now sufficient. Manufacture of the filter becomes easier.

[Brief explanation of the drawing]

Figure 1 is a cutaway side view of the main parts of a vacuum cleaner that employs the dust removal device of the present invention, Figure 2 is a perspective view showing dust adhering to a conventional pre-filter, and Figure 3 is the filter of the present invention. FIG. 4 is an exploded perspective view showing a part of the structure; FIG. 4 is a cutaway perspective view of essential parts showing the dust removal operation; FIG. The figure is a perspective view of a seat box showing another embodiment, FIG. 8 is a perspective view of a seat box showing another embodiment, and FIG. 9 is a graph comparing the dust suction power of the conventional example and the present invention. It is. 5... Crotch seat box, 5a... Crotch seat part, 10
...Main filter, 19...Pre-filter

Claims (1)

[Scope of utility model registration request] A disc-shaped pre-filter that captures coarse dust is rotatably arranged between the crotch seat and the main filter that captures fine dust, and a part of the crotch container is connected to the pre-filter. A dust removal device for a vacuum cleaner with a convex inner surface that almost touches the surface of the vacuum cleaner.