JPS5813179B2 - Think Usojikino Yukayou Icomig - Google Patents

Description

[Detailed description of the invention] The present invention relates to a floor suction tool for a vacuum cleaner.

When cleaning soft floor surfaces such as carpets, conventional suction tools reduce operating resistance by retracting the brush or applying no force, and by using a flat ground surface to reduce suction and operating force from the floor. It was common for the light to be transmitted to the surface.

In this case, in order to move more lightly, the area of the ground contact part should be widened and the curvature of the ground contact part in the operation direction should be increased to make it difficult for the ground contact part to be buried in the brush bristles. The grounding part was moved away from the floor surface at key points to create spaces as leak points a, thereby reducing the negative pressure inside the suction groove and thereby reducing the suction force.

However, such means are unfavorable from the viewpoint of dust suction performance.

That is, in order to improve dust absorption performance, measures should be taken such as eliminating leakage holes, increasing ground pressure and negative pressure, and reducing passage resistance so that a large amount of strong, high-speed airflow occurs inside the carpet.

Therefore, in the conventional case, for the purpose of reducing the operating force, without paying attention to the interaction with dust suction performance, the curvature was simply increased, or leakage points were created that did not bring any advantage to dust suction performance. It had quite a few shortcomings.

The present invention introduces air into the groove in order to reduce the suction force, and reduces the airflow resistance by reducing the air flow and passage distance without separating the ground contact area from the floor surface like in the case of conventional leakage points. , attempts to achieve this by passing a large amount of airflow.

An embodiment of the present invention will be described below based on the drawings.

In the figure, 1 is the main body of the floor suction tool, and a conveying pipe 2 is installed in the lower center of the body to convey dust-containing air to the vacuum cleaner (Fig. 1 A).
A suction port 3 that serves as an entrance to the air, a suction groove 4 that spreads on both sides of the
Before and after this suction groove 4, a grounding part 5 for transmitting suction force and operating force to the floor surface, and a brush 6 mainly used on the board surface are provided.

The grounding surface 7, which is the lowermost surface of the grounding portion 5, is shown in FIG. 2A-A.
As shown in Figures 2 to 4, the shape of the grounding part in the cross section, B-B cross-section, and C-C cross section is changed periodically from almost zero to infinity by periodically changing the curvature R in the operating direction of the suction tool. It is changing to.

If we look at the front and rear two ground contact parts 5 with respect to the operating direction of the suction tool, the front contact part has a contact surface shape with a large curvature, while the rear contact surface has a contact surface shape with a small curvature. The curvature of the ground contact is reversed at the front and rear so that the parts correspond to each other.

A case will be described in which the floor suction device configured as described above is operated and used as a vacuum cleaner on a soft floor surface such as a carpet.

Brush 6 should be attached to body 1 so that it does not get tangled in carpet hair.
It is pulled inward, and only the grounding portion 5 is grounded.

As shown in FIGS. 2 to 5 and the perspective view of FIG. 6, this grounding portion 5 has a grounding surface 7 that periodically changes the curvature of the surface. , effectively transmits the operating force to the floor (front part in Figure 3 or rear part in Figure 5)
, a surface with small curvature, that is, a surface that is almost edge-like, (
As for the tip (the rear part in Figure 3 or the front part in Figure 5), it is horizontal with the wide surface (it is the same surface that differs only in curvature), so when the curvature is reduced, the load per unit area usually increases. There is no chance of it digging into the carpet,
This means that the air flow passage area remains constant and the passage length becomes shorter.

As a result, ventilation resistance is reduced, more airflow flows than on a wider surface, and this, combined with the fact that the flow path is short, makes it easier for dust to be transported to the suction groove 4.

In addition, the edge shape makes it easier to rub carpet hair and remove dust from the surface, which actually improves dust absorption performance.

Furthermore, as more airflow flows, the negative pressure inside the suction groove 4 also becomes smaller, and the suction force also becomes smaller, which is the effect of killing two birds with one stone.

Therefore, by adjusting the wide area and curvature of the ground contact surface 7, it is possible to achieve a higher level of balance between operability and dust suction performance than in the prior art.

Also, if you want more airflow to flow in, the surface with smaller curvature should not be flush with the larger surface, but should be drawn in to create a gap, or if you want to have a strong edge shape effect, you can do the opposite. Good.

In addition, in this embodiment, since the curvature is shifted by half a period before and after the suction groove, the force applied to the suction part is transmitted to the floor surface by the ground plane 7 with a large curvature, and the carpet sinking preventive bristles are used to effectively transfer the force to the suction part. It has the effect of reducing the operation force of the suction part by climbing up, and preventing unnecessary leakage due to the large airflow passage resistance, and the ground plane 7 with a small curvature can blow down the carpet hair and spread it, sucking in deep dust, rubbing the carpet hair, and reducing the surface. By moving the suction section back and forth, there are two different effects: improving dust suction performance by removing adhering dust and allowing more airflow to flow in quickly, and optimizing the negative pressure in the groove by allowing more air to flow in. If so, it will appear equally across the entire width.

Therefore, they work to complement each other's differences in performance due to shape,
Performance will be balanced.

As described above, the suction tool according to the present invention changes the curvature of the ground plane in the direction of airflow passage, fully exploiting the advantages of the difference in shape, and by shifting the period of the change before and after the suction groove, the cleaning surface has a curvature. It is made so that the functions of both different contact surfaces are added, and it is possible to obtain good dust suction performance.

In the embodiments described above, the apexes of both the surfaces with large and small curvature are at the same height (therefore, the apex portion of the lower surface is in a straight line over the entire width). If you want to make it lighter, you can constrict the surface with a small curvature to make it easier for airflow to enter.In other cases,
A surface with a small curvature may be made to protrude from a surface with a large curvature.

These do not need to be applied to the entire width, but may be applied to one portion, and the circumference of the curvature change does not have to be regular, and may be made larger or smaller.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the suction device of the present invention and a vacuum cleaner connected together, FIG. 2 is a bottom view of the floor suction device according to an embodiment of the present invention, and FIG. 3 is taken from A-A in FIG. 1. The cross-sectional view, Figure 4 is the same B-
FIG. 5 is a sectional view taken along line C--C, FIG. 6 is a partial perspective view of the grounding portion, and FIG. 7 is a side view of the main part of the conventional example. 1... Suction tool body, 3... Suction port, 4
...Suction groove, 5...Grounding part, 7...
···contact area.

Claims (1)

[Claims] 1. A suction port, a suction groove extending on both sides of the suction port, and two protruding grounding portions raised approximately parallel to the front and back of the suction groove are formed on the lower surface of the suction device body, and the above-mentioned The grounding part has parts with a large curvature and parts with a small curvature, and these parts are arranged alternately, and each part has a curvature of the grounding part of the front and back parts with respect to the operating direction of the suction device. A floor suction tool for a vacuum cleaner, which is characterized by being reversed.