JPS625612B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a suction tool for a vacuum cleaner, and an object of the present invention is to reduce operating resistance of the suction tool and to obtain a strong suction force.

In conventional suction tools, depending on the condition of the surface to be cleaned, for example, a brush-like member is used to clean hard surfaces such as between boards, and a contact member with a sliding part is used to clean soft surfaces such as carpets. By pressing the suction tool against the surface to be cleaned, the brush-like member moves and brings the contact member into contact with the surface to be cleaned. However, on soft surfaces such as carpets,
When force is applied to the brush, it becomes entangled with carpets and the like, increasing resistance and making operation difficult.Furthermore, if the contact member is pressed strongly against a hard surface, the surface may be damaged.

The present invention solves the above-mentioned drawbacks, and one embodiment thereof will be described below with reference to the drawings.

In the figure, reference numeral 1 denotes a suction tool main body, which includes a suction groove body 2 and a membrane body 3 whose both ends are fixed to the suction tool main body 1 and the suction groove body 2, making the suction groove body 2 vertically movable. are doing. 4 is a communication hole, which connects the suction tool body 1
The airtight chamber 5 formed by the membrane body 3 and the suction groove body 2 is connected to the suction groove 6 at approximately the center between the end of the suction groove 6 and the suction port 7. 8 is below the suction tool and transmits the force of the suction tool main body 1 to the suction groove body 2 approximately horizontally. Reference numeral 9 denotes a power transmission section, and in this embodiment, a roller rotatably attached to the lower suction tool 8 is used to transmit the operating force to the floor surface. 10
is a brush body fixed to the suction groove body 2.

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

Generally, in order to improve suction performance, it is sufficient to increase the negative pressure in the suction groove 6 and obtain a strong suction flow, but this increases the suction force and increases the frictional resistance.
However, since the suction groove 6 of the present invention communicates with the upper airtight chamber 5 through the communication hole 4, the suction force does not increase in proportion to the negative pressure but is canceled out. In other words, as shown in FIG. 5, the suction pressure in the suction groove 6 (the force that tries to attract the suction groove body 2 to the floor surface) has a distribution such as c, which is large near the suction port 7 and small at the end. When the communication port 4 is provided at a point a approximately in the center of both ends of the suction groove 6 and the suction port 7, the negative pressure in the suction groove 6 is guided to the upper part, and the negative pressure in the airtight chamber 5 becomes as shown in b. , this becomes a force that tries to float the suction groove body 2 upwards, resulting in a negative pressure that is almost the same as the mutually opposing suction forces, so that the force that presses the suction groove body 2 downward is almost only its own weight. In this case, the negative pressure itself within the suction groove 6 has not changed, so the suction force has not changed. Due to the decrease in the downward pressure in the suction groove body 2, a downward force due to the difference between the atmospheric pressure and the negative pressure in the airtight chamber 5 is transmitted to the suction device main body 1 through the suction device main body 1 above the airtight chamber 5, but this force is The suction groove body 2 is not affected by the body 5, but is transmitted to the floor surface by the roller 9 rotatably attached to the suction tool body 1, and the resistance is reduced due to the difference in friction coefficient with the brush body 10, making operation easier. It doesn't get heavy. In addition, regardless of the operating angle of the suction tool main body 1 during cleaning, the suction groove body 2 is always in proper contact with the floor surface with the brush body 10 due to the action of the membrane body 3, and a strong suction force can be obtained. can.

Furthermore, by fixing the brush body 10 to the suction groove body 2 as in this embodiment, it is possible to clean the surface of a board, etc. and a carpet, etc. without the need to switch the brush body. In addition to effectively sucking in debris, it also smoothes the surface of the carpet and aligns the direction of the hair. In this case, in the past, too much force was applied to the brush body, which combined with the large coefficient of friction increased the operating resistance, making it extremely difficult to handle, but in the present invention, the brush body 10 has
As mentioned above, the groove structure is such that almost no force is applied downward, and on soft surfaces such as carpets, the surface is deformed and the protrusion of the brush body 10 is small, so the suction groove body 2 The flat part on the bottom of the handle also supports the downward force, further reducing operating resistance. In addition, even when used on hard surfaces such as between boards, most of the suction force is received by the freely rotatable roller 9.
The downward force applied to the suction groove body 2 is small, and since the brush body 10 is fixed, it will not damage the floor surface.

Note that in the above configuration, if the brush body 10 is not fixed to the tip of the suction groove body 2, if the tip is made into an edge shape, the passage formed between the tip and the floor will be shortened. This allows for a smooth air flow, improving performance, and also prevents the hair from getting stuck in the carpet.

As described above, according to the present invention, the communication hole is formed in the vertically movable suction groove body, and the suction force is dispersed to areas other than the suction groove body by communicating with the airtight chamber surrounded by the membrane on the upper part of the suction groove body. This makes it possible to obtain a suction tool that has low operating resistance, does not require switching between different floor surfaces, exhibits high performance, and is extremely user-friendly. Further, since the suction groove body is balanced 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 the drawing]

FIG. 1 is a bottom view of a suction device according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the line AA in FIG.
The figure is a sectional view taken along line BB in figure 1 showing the cleaning state, and figure 4.
The figure is a perspective view of a state in which the membrane body is 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, 5...Airtight chamber, 6...Suction groove, 7...Suction port, 9...Power transmission part .

Claims (1)

[Claims] 1. A suction device main body having a suction port approximately in the center and with an open bottom surface, a suction groove body having a suction groove and located at the bottom of the suction device main body and in contact with the floor surface, and a suction device main body. A membrane body that connects the suction groove body in a vertically movable manner, and a power transmitting part that transmits the force from the suction tool body to the floor surface, and is formed by the suction tool body, the suction groove body, and the membrane body. A suction tool for a vacuum cleaner, wherein a communication hole connecting the airtight chamber and the suction groove is formed in the suction groove body at a position where the suction force to the floor surface and the pulling force are approximately equal.