JPS6112688B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a suction tool for a vacuum cleaner.
The purpose is to increase the pressure inside the suction device,
To provide a suction tool that has strong dust suction power, maintains pressure up to the end face of the suction tool, and can clean a wide area.

In the past, many suction devices had a thin plate-like lip made of an elastic material such as rubber around the suction port in order to increase the pressure inside the suction device. When cleaning, this lip comes into contact with the surface to be cleaned and creates a large amount of resistance, making the suction tool difficult to operate and resulting in extremely poor operability. Recently, there have also been some models in which the above-mentioned lip has been moved up and down to eliminate these drawbacks. However, since this device moves the entire lip up and down, its vertical guide structure is complicated, and when the lip is protruding, the tip ends up touching the surface to be cleaned, reducing operability. Ta.

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

In the figure, 1 is a vacuum cleaner body with built-in electric blower, dust collector, etc., 2 is a flexible hose that is removably inserted into the main body 1, and the other end is connected through an extension pipe 3. It is connected to the suction tool 4. 5
1 is a main body of the suction device, and has a bumper 6 made of an elastic material such as rubber on the outer periphery. Reference numeral 7 denotes a lower body of the suction tool combined with the suction tool main body 5, which has a suction port 8 in the center, and ventilation grooves 9, 9' are provided on the left and right sides of the suction port 8. Reference numeral 10 denotes a telescopic shield made of an elastic and flexible material such as rubber, which is provided in front of the ventilation grooves 9 and 9', and has a U-shaped tip 10a and a bellows-shaped base 10b. It is a plate and is inserted into and out of the groove 11 of the lower body 7 of the suction tool. The end of this shielding plate 10 is adhered to a mounting plate 12 fitted to the lower body 7 of the suction tool. 13 is a pressing plate inserted into the hollow part of the shielding plate 10 and combined with a part of the U-shaped portion at the tip;
It is moved up and down by the cam 14. This cam 14 is rotatable around a cam shaft 15, and has a suction tool main body 5 at the other end.
A more protruding lever 16 is provided. 17,1
The roller 18 supporting the suction tool 4 against the cleaning surface is a rear brush 7'.

Next, to explain the operation of the present invention, when cleaning a floor surface or a folding surface, by operating the switching lever 16 and pushing down the pressing plate 13, the base bellows part 10b of the shielding plate 10 is extended, and the tip of the bellows part 10b is extended. Since the character-shaped portion 10a protrudes from the groove 11 of the lower body 7 of the suction tool and is close to the cleaning surface, the pressure inside the suction tool 4 increases, and the air flow through the gap between the shield plate 10 and the cleaning surface becomes faster and the air is collected. Dust efficiency can be increased. This will suck up the dirt stuck to the surface being cleaned, as well as the fine dust that has gotten into the tatami mats. At the same time, the suction pressure is applied to the end surface of the suction tool 4, and a wide cleaning effect can be obtained. On the other hand, when cleaning the bathroom, by operating the switching lever 16, the bellows portion 10b of the shielding plate 10 contracts, pushing up the pressing plate 13, and at the same time, the tip U-shaped portion 10a of the shielding plate 10 is pulled up. Since it is retracted into the groove 11 of the lower body 7 of the suction tool, the shielding plate 10 does not slide on the carpet and the operation cannot be moved, and cleaning can be performed with a light operating force.

As is clear from the above description, in the suction tool of the present invention, the dust collection effect is enhanced by protruding the shielding plate when cleaning floors or tatami mats, and the operating force is reduced by retracting the shielding plate when cleaning the floor. It is small and the shielding plate can be easily moved in and out by operating the switching lever. Further, since the shielding plate has a bellows-shaped base, it can be easily expanded and contracted by the vertical movement of the pressing plate, so that the shielding plate can smoothly move in and out. In addition, the shielding plate expands and contracts via its bellows-shaped base and does not move up and down as a whole, so there is no need for a conventional complicated guide mechanism.Furthermore, since the tip is U-shaped, its protrusion Even if the cleaning device is in such a condition, it will not hit the surface to be cleaned, and the operability can be further improved.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing a state in which a suction tool of a vacuum cleaner according to an embodiment of the present invention is connected to the main body, Fig. 2 is a bottom perspective view of the suction tool, and Fig. 3 is a central cross-section of the suction tool. 4 are perspective views of essential parts showing the switching mechanism. 9... Suction port, 10... Shielding plate, 10a...
Tip, 13...Press plate, 14, 16...Switching device (cam, lever).

Claims (1)

[Claims] 1 In front of the suction port, a hollow shielding plate made of a flexible and elastic material with a U-shaped tip and a bellows-shaped base is installed, and inside this shielding plate there is a vertically movable shielding plate. A suction tool for a vacuum cleaner, in which a pressing plate is inserted to expand and contract the shielding plate, and a switching device is further provided to move the pressing plate up and down.