JPS6119258B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dust removal device for a vacuum cleaner.

In conventional vacuum cleaners, a pre-filter 101 is disposed in front of a filter 100 for capturing dust, as shown in FIGS. 8 and 9, to capture coarse dust. 1
01 is generally not provided with a means for removing attached dust. Therefore, the coarse dust captured by the pre-filter 101 adheres to the surface of the pre-filter 101 in a compressed state, increasing ventilation resistance and reducing the dust suction ability. I had to remove the dust that had adhered to the filter surface. In order to solve this problem, a structure has been proposed in which the prefilter is rotated to shake off the dust attached to the prefilter, but in this case, when there is a lot of dust in the dust collection section, this dust adheres to the prefilter. However, when there is only a small amount of dust accumulated in the dust collecting section, this effect is not seen and there is a problem that the dust remains attached to the prefilter surface.

The present invention provides a dust removal device that removes dust attached to the prefilter surface regardless of the amount of dust in the dust collection section, eliminates the above-mentioned complicated dust removal work, and maintains high dust absorption ability over a long period of time. One embodiment will be described below based on the drawings.

In FIGS. 1 to 3, 1 is a 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, and 5 is a dust removal section 5a inside. and a dust box coupled to the main body 1;
5' is a connection port for connecting a hose (not shown), 6
7 is a buckle for attaching and detaching the dust box 5 from the dust box 5; 8 is a support frame for supporting the tight rubber 9 for tightening the dust box 5 and the main body 1;
This support frame 8 includes a bearing 8' that supports a rotating shaft 11 formed integrally with the front frame 10' of the main filter 10, and a diaphragm 12 that repels one end of the diaphragm 12 inserted into the folds of the main filter 10. The dust removal body 13 is also provided. 8a is a ventilation hole formed in the support frame 8;
14 is a large pulley attached to the other end of the rotating shaft 11, and 15 is a small pulley that engages with the large pulley 14, and also has a claw portion 15' that engages with the 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 a rib 10a that protrudes from the rear frame 10'' of the main filter 10.
and the support frame 8 to maintain airtightness. 19 is a prefilter that separates coarse dust from fine dust. A rotatably tight packing 21 is fitted onto the outer periphery of the prefilter 19 and the inner periphery of a prefilter frame 20. The pre-filter 19 is the main filter 1.
0 frame body 10', and the same main filter 10
It rotates as one. 22 is the prefilter 1
A rod-shaped dust removing body is rotatably provided at the upper end of the pre-filter frame 20 so as to be in almost sliding contact with the front surface of the pre-filter frame 20.
is provided.

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, and the main filter 10 rotates.
At the same time, the prefilter 19 also rotates. As a result, the coarse dust adhering to the prefilter 19 and acting as a ventilation resistance of the prefilter 19 is removed by the dust removing body 22 provided at the upper end of the prefilter frame 20. At this time, the dust removing body 22 rotates in the direction of rotation of the prefilter 19 due to friction with the surface of the prefilter 19, and after rotating by a certain angle, the stopper 23
It is locked by. Therefore, as shown in FIG.
The dust removal body ₂ is
2, the final dust removal body 22 is moved relative to the final dust removal body 22.
More detached. At the same time, the fine dust adhering 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. When the prefilter 19 is rotated in the opposite direction, the dust removing body 22 is rotated to the position indicated by the dotted line in Figure 2, and the same dust removal as described above is performed.

4 to 6 show another embodiment of the present invention. In this case, a rod-shaped dust removing body 22' is rotatably provided on a shaft 24 that rotatably supports the center of the prefilter 19'. Since it is brought into almost contact with the prefilter 19', the same effect as described above can be obtained.

As mentioned above, the prefilter surface is cleaned each time dust is removed, so the amount of dust collected and the dust suction power (dust suction air volume)
As shown in Figure 7, the relationship between the Since the dust is stirred up and fine dust is separated, the effect of compressing coarse dust is enhanced and the amount of dust collected is also increased. In addition, since dust is removed regardless of the amount of dust, the area of the pre-filter is small, and instead of the conventional one that was provided not only on the front but also on the side, only the front is sufficient, making it easier to manufacture the pre-filter. It is something. Furthermore, since the dust removal body rotates left and right with respect to the normal line of the prefilter, reliable dust removal can be achieved regardless of the direction of rotation of the prefilter, and when removing dust, the dust removal body is tilted with respect to the normal line. Because of this, it has excellent dust removal effects, such as improving the ability to remove scraped dust.

[Brief explanation of the drawing]

Fig. 1 is a cutaway side view of the main parts of a vacuum cleaner employing the dust removal device of the present invention, Fig. 2 is a front view showing the configuration of the filter part, and Fig. 3 is a cutaway of the main parts of the filter part showing the dust removal operation. 4 is a cutaway side view of another embodiment, FIG. 5 is a front view of the filter section, and FIG. 6 is a cutaway perspective view of the filter section showing the same removal operation. Figure 7 is a graph comparing the dust suction power of the conventional product and the present invention, Figure 8 is a cutaway side view of the main part of the conventional example, and Figure 9 is a perspective view showing the state of dust adhesion to the prefilter of the same vacuum cleaner. It is a diagram. 5a...Dust collection section, 10...Main filter, 19
... Prefilter, 20 ... Prefilter frame, 22 ... Dust removal body.

Claims (1)

[Scope of Claims] 1. A substantially disc-shaped pre-filter for capturing coarse dust is rotatably disposed between the dust collecting section and a main filter for capturing fine dust, and the pre-filter is substantially in contact with the main filter. A dust removal device for a vacuum cleaner is provided with a dust removal body that is rotatable in the left and right directions and within a certain angle range with respect to the normal line of the prefilter. 2. The dust removal device for a vacuum cleaner according to claim 1, wherein the dust removal body is formed of a rod-shaped body, and one end of the dust removal body is attached to the prefilter frame. 3. The dust removal device for a vacuum cleaner according to claim 1, wherein the dust removal body is formed of a rod-shaped body, and one end of the dust removal body is attached to a shaft portion that rotatably supports the prefilter.