JPS582268Y2 - 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 installed 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-absorbing capacity. Dust adhering to the surface had to be removed by hand.

In order to solve this problem, the inventors rotated the pre-filter, brought the ribs closer to the pre-filter from inside the dust container, and rotated the pre-filter, so that the ribs could We have developed a filter that removes dust from the surface.

However, in this case, the dust is forced into the ribs and forms a dumpling shape as shown in FIGS. 2 and 3a, which causes a problem in that the rotational resistance of the prefilter increases and the rotational torque increases.

For this reason, for devices in which the cord pull-out and blur filter rotation are linked, the pull-out force increases, and even if the cord is turned manually, it becomes difficult to rotate. There is a concern that the rotating shaft may be damaged due to this.

The purpose of this invention is to prevent the rotational force of the pre-filter from increasing regardless of the amount of dust by changing the shape of the rib for the dust removal hand.
One embodiment 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 dust container having a dust chamber 5a and connected to the main body 1; 5' is a hose (not shown) Connecting the suction port,
6 is a handle for transporting the dust container 5; 7 is a buckle for attaching and detaching the main body 1 and the dust container 5; 8 is a support frame for supporting the tightening rubber 9 for tightening the dust container 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 is inserted into the wall of the main filter 10. A dust removing body 13 is provided that repels one end.

8a is a ventilation hole formed in the support frame 8; 14 is the rotation shaft 1;
The large pulley 15 attached to the other end of 1 is a small pulley that meshes with this large pulley, and the clutch plate 1 on the main body 1 side
It also has a claw portion 15' that engages with 6.

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

A dust-tight backing 18 is inserted between the supporting frame 8 and a rib 10a protruding from the rear frame 10'' of the main filter 10 to maintain airtightness.

19 is a substantially disc-shaped pre-filter that separates coarse dust.

A backing 21 is fitted around the outer periphery of the pre-filter 19 and is rotatably tight to the inner periphery of the frame 20 of the pre-filter 19.

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

Reference numeral 22 denotes a dust removal rib which is formed integrally with the dust container 5 and whose tip is located close to 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 at the same time the pre-filter rotates.
19 also rotates.

As a result, the dust adhering to the pre-filter 19 and increasing the ventilation resistance of the pre-filter 19 is removed from the dust that is closer to the pre-filter 19 than the inner wall of the dust container 5 because the pre-filter 19 rotates. The ribs 22 cause a peeling phenomenon, and dust adhering to the surface of the pre-filter 19 is removed.

However, in the past, in order to ensure sufficient rib strength,
As shown in the figure, the width of the ribs was made equal across the entire length, but
With this shape, the separated dust is destroyed at the dust removal rib 22, so that it is compressed one after another, and the dust becomes dumpling-shaped.

Therefore, the frictional resistance with the pre-filter 19 increases, the rotational torque increases, and the cord pulling force becomes heavy, making it difficult to rotate manually.

On the other hand, in this embodiment, the dust removal rib 22 is
The compressed lump of dust escapes from the relief part A shown in the figure as shown in Figure 3, and even if the amount of dust increases, the rotational torque does not increase.

In this way, according to the present invention, as in the case of the already developed dust removal rib, since the dust is compressed at the dust removal rib, the resistance with the pre-filter increases and the rotational torque increases. Moreover, it has almost no effect on the dust removal effect on the surface of the pre-filter, the cord pulling force is small, and damage to the filter device can be prevented.

Further, by aligning the dust removal rib with the center line of the prefilter and having a relief portion on its outer periphery, the following effects can be expected.

That is, since the pre-filter has a substantially disk-like shape, the filtration area increases from the center toward the outer periphery.

Therefore, the amount of dust removed by the dust removal ribs is larger on the outer periphery and less on the inner periphery.

Therefore, in the present invention, since there is a relief part corresponding to the part where the most amount of dust is removed, a smooth and efficient dust relief operation can be performed, and this effect is independent of the rotation direction of the pre-filter. It is something that is demonstrated.

[Brief explanation of the drawing]

Fig. 1 is a cutaway side view of the essential parts of a vacuum cleaner showing an embodiment of the present invention, Fig. 2 is a sectional view of the main parts showing the relationship between the dust removal ribs and the pre-filter, and a shows a conventional dust removal knob. Indicates the shape, b
indicates the shape of the dust removal rib of the present invention. Figure 3 is an explanatory diagram showing the state of dust removal in Figure 2;
is the conventional one, and b is the one of the present invention. 5...Dust storage container, 5a...Dust storage chamber, 1
0... Main filter, 19... Pre-filter 122... Dust removal rib.

Claims (1)

[Scope of utility model registration request] A substantially disk-shaped pre-filter for capturing coarse dust is rotatably disposed between the dust collection chamber and a main filter for capturing fine dust, and is located close to the mesh portion of the pre-filter.
In addition, a dust removal rib extending corresponding to the center line of the pre-filter is provided protruding from the inner wall of the dust container, and a part of the dust removal rib outside the approximately outermost periphery of the pre-filter is scraped by the dust removal rib. A dust removal device for a vacuum cleaner that is equipped with a relief part to release the emitted dust.