JPS605295B2 - Vacuum cleaner suction tool - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a suction tool for a vacuum cleaner, and is intended to improve usability by weakening the adsorption force of the suction pressure to the surface to be cleaned, thereby reducing operating resistance.

To operate the suction tool of a vacuum cleaner, it is necessary to apply a force that overcomes the frictional force between the suction part and the floor surface.Frictional force is a function of the friction coefficient and normal force, and in order to improve suction performance, Increasing the force increases the adsorption force, which increases the normal force and increases the operating force. In the past, it was necessary to compromise on the suction power to a certain extent, or to obtain a high suction power by compromising on the operating force.

Particularly on soft floors with a relatively large coefficient of friction, such as on carpets, even if it is easy to operate on floors with low resistance, such as on tatami mats, the operating force becomes large, making it difficult to handle. The present invention aims to eliminate the above-mentioned drawbacks, and one embodiment thereof will be described below with reference to the drawings.

In the figure, 1 is a suction device main body, with a suction conductor 2 inside,
It has a membrane body 3 whose both ends are fixed to the suction odor main body 1 and the suction conductor 2, and which makes the suction groove body 2 vertically movable. 4
The airtight chamber 5 and the suction groove 6 formed by the suction odor main body 1, the membrane body 3, and the suction groove body 2 are connected to each other at the end of the suction groove 6.

7 is a lower suction tool which transmits the force of the suction tool main body 1 to the suction groove body 2 substantially horizontally.

Reference numeral 8 denotes a power transmission section, which in this embodiment is a roller rotatably attached to the lower suction tool 7, and transmits the operating force to the floor surface.

Therefore, the normal force of the suction conductor 2 is only related to its own weight and suction force. 9 is a suction port for dust.

In the suction tool having the above structure, the operation when the vacuum cleaner is operated will be described below.

In order to improve the suction performance, it is sufficient to increase the negative pressure in the suction groove 6 to obtain a strong suction flow.
As a result, the suction odor body 1 can be properly grounded on the carpet surface at all times without being affected by changes in the angle of the suction odor body 1, and the negative pressure within the suction groove 6 can be increased. In this case, the suction force increases as the negative pressure increases, which increases the frictional resistance and adversely affects the operating force, but the negative pressure is guided to the upper airtight chamber 5 by the lotus through hole 4, Although a downward force is applied to the suction device main body 1 due to the difference between atmospheric pressure and the negative pressure in the airtight chamber 5,
This does not affect the suction groove body 2 due to the membrane body 3, but is transmitted to the force transmission part 8' which is rotatably formed in the suction tool main body 1. More specifically, the suction pressure applied to the suction groove 6, that is, the negative pressure, becomes stronger toward the center than at both sides, as shown in FIG. Here, the pressure applied to the lower surface of the suction conductor 2, that is, the force Pd that pulls the suction groove body 2 downward, is the product of the pressure and the lower surface area based on the pressure distribution in FIG. 5, and is always constant. .
However, the upward tensile force Pu applied to the upper surface of the suction groove body 2 facing the airtight chamber 5 changes depending on the position of the lotus hole 4.
For example, a lotus through hole 4 is located at a point a facing the center side of the suction groove 6.
When , the airtight chamber 5 is isolated from the atmosphere, so
A negative pressure of Pa is applied to the entire area of the airtight chamber 5, and therefore,
An upward tensile force P of the area x Pa acts on the upper surface of the suction groove body 2 .

Since the relationship between P skin and Pd is Pua>Pd, the suction conductor 2 moves upward. The above upward tensile force P
u becomes smaller as the formation position of the lotus hole 4 is shifted to the side of the suction groove body 2, and at point b, Pub=Pd, and furthermore, at point c, Puc<Pd, and the suction groove body 2 is moved downward. It will be pulled to the surface and will come into close contact with the carpet surface.

Therefore, the suction force of the suction groove body 2 itself can be reduced without reducing suction performance. Furthermore, since the friction coefficient of the power transmission section 8 is much smaller than that of the suction groove body 2, the resistance is greatly reduced. Most of the operating force for moving the suction odor main body 1 is also transmitted to the power transmission part 8, so there is no adverse effect on the suction groove body 2, and the operational resistance can be reduced. In addition, the suction groove body 2 uniformly adheres to the carpet surface without being influenced by changes in the angle of the suction odor main body 1 due to the purulent body 3, thereby providing a more stable suction force. As described above, according to the present invention, the suction groove body is provided with a lotus passage □, and the suction force is dispersed on the upper surface of the suction groove body by the airtight chamber, and is transmitted to the floor surface by the power transmission portion with low frictional resistance, so that the suction force is particularly It is possible to obtain a suction tool that is easy to operate while ensuring high performance even on a floor surface that conventionally has a large operating resistance such as a floor surface.

In addition, since the force of the suction groove body is adjusted only by the pressure acting above and below it, there is no variation in performance, the structure is extremely simple, and failures can be reduced.

[Brief explanation of drawings]

Fig. 1 is a bottom view of the suction device according to the embodiment of the present invention, Fig. 2 is a sectional view taken along line A-A in Fig. 1, and Fig. 3 is a sectional view taken along line B-B in Fig. 1 showing the cleaning state of the carpet surface. 4 is a cross-sectional view, FIG. 4 is a perspective view of the membrane body being fixed to the suction groove body, and FIG. 5 is a distribution diagram of negative pressure applied to the suction groove body. 1...Suction tool body, 2...Suction groove body,
3...Membrane body, 4...Communication hole, 6...
- Suction groove, 8... Power transmission section, 9... Suction port. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 1. A suction tool main body that is open on the lower surface and has a suction port in the center, a suction groove body that is located inside the suction tool main body and has a suction groove that collects dirt to the suction port, and the suction tool main body An airtight chamber formed by the suction tool body, the suction groove body, and the membrane body, comprising a membrane body that connects the suction groove body in a vertically movable manner and a power transmission part that transmits the force from the suction tool body to the floor surface. The suction of a vacuum cleaner is provided with communication holes on both sides of the suction groove that connect the suction groove and the suction groove, and the pulling force of the suction groove is set to be smaller than the suction force of the suction groove against the floor surface. Ingredients.