JPS6038444Y2 - vacuum cleaner suction tool - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a floor suction device used in a vacuum cleaner.

Conventionally, vacuum cleaner suction tools have been equipped with only a rear brush, or with both a front brush and a rear brush, and cleaning carpets or floors such as tatami mats can be performed by operating the brushes in and out. That's what I do.

That is, when cleaning a carpet, the brush is recessed, and when cleaning the floor, the brush is protruded.

However, when cleaning a carpet, if the brush is recessed, the desired brush effect cannot be obtained; on the other hand, if both the front brush and the rear brush are protruded at the same time, the brush effect is sufficient. However, the frictional resistance between the brush and the carpet is too large to allow the suction tool to move back and forth smoothly.

Currently, the brush is immersed in the carpet when cleaning a carpet because it is difficult to move the suction tool back and forth.

Furthermore, when cleaning a floor surface, if both a front brush and a rear brush are provided, there is a drawback that dust is pushed away by these brushes.

The present invention was devised in view of the above-mentioned matters, and relates to a suction tool for a vacuum cleaner that efficiently cleans carpets or floors, has a simple structure, and can be easily switched.

A detailed explanation will be given below using an example shown in the drawings.

1 is a suction tool main body having a sled 2 on the lower surface, and a drive pipe 3 is attached to the rear upper part of the main body so as to be movable up and down. It is attached so that it can move freely.

The sled 2 is attached to the suction device main body 1 via a bumper 6, and a suction lower is bored in the center of the bottom of the sled 2, and air is supplied to the lower ends of both end faces of i7a communicating with the suction lower. A cutout 7b for intake is formed.

8.8 is the front wheel provided on both sides of the front of the sled 2, and there is a distance Δt between this floor contact part and the lowest end of the suction lower.
A gap is formed.

Reference numeral 9 denotes a rear wheel rotatably provided at the center of the rear portion of the sled 2 about a pivot shaft 10.

Reference numerals 11 and 12 denote a front brush and a rear brush that are retractably provided in front and rear of the suction lower, and the rod body 11. ．． 12
．． A large number of brush parts 11b are provided at the lower end of the .

12, will be installed.

Rod bodies 11□, 1 of these front brush 11 and rear brush 12
2° is integrally formed via a connecting portion 13, and the connecting portion 1
A shaft portion 138 is provided at an appropriate position of the shaft portion 13. is rotatably supported on a rib 14 formed on the suction tool main body 1.

Therefore, the front brush 11 and the rear brush 12 are connected to the connecting portion 1.
There is a seesaw movement using the shaft portion 13a of No. 3 as a fulcrum, and this seesaw movement causes the front brush 11 and the rear brush 12 to move.
and appear and appear alternately from the bottom surface of sled 2.

Reference numeral 15 designates an external operating knob provided on one side of the upper surface of the suction device main body 1, which is pivoted so as to be movable back and forth by a pivot 16 16 protruding from both sides, and both ends of the connecting portion 13 are attached to the lower surface of the external operating knob. The front brush 11 and the rear brush 12 are pressed against each other to make the front brush 11 and the rear brush 12 appear and disappear alternately. A contact piece 20 is formed.

Then, when the front part of the external operation knob 15 is pressed,
The pressing part 17 on the lower surface presses the front part of the connecting part 13,
The front brush 11 protrudes from the lower surface of the sled 2.

On the other hand, if you press the rear part of the external operation knob 15,
The pressing part 18 on the lower surface presses the rear part of the connecting part 13,
The rear brush 12 protrudes.

The protruding state of the front brush 11 or the rear brush 12 is as follows:
The contact piece 20 is maintained by receiving the biasing force of the leaf spring 19.

In the above embodiment, the external operation knob 15 is designed to be switched in the front-rear direction of the suction tool main body 1, so it can be easily switched with the foot.

That is, when the direction of operation is to the left or right, the foot hits the high central part of the suction device main body 1 first, making it difficult to operate.

Further, the tip of the brush portion 11b of the front brush 11 is inclined at an angle θ (approximately 25°) toward the suction lower in order to enhance the effect of removing dust from the carpet.

Reference numeral 21 denotes a shielding plate made of a flexible material attached along the rear edge of the groove 7a communicating with the suction lower, the tip of which protrudes several degrees from the lower surface of the sled 2 and is always in contact with the floor surface. It is bent outward (in the direction opposite to the suction lower), and comes into close contact with the floor surface during suction work to improve airtightness.

Here, the operation of the present invention will be explained.

First of all, when cleaning the carpet, use the external control knob 15.
When the front part of the connecting part 13 is pressed, the front part of the connecting part 13 is pressed by the pressing part 17 on the lower surface of the connecting part 13.
is the shaft portion 13. The front brush 11 protrudes from the bottom surface of the sled 2 by tilting forward using the sled 2 as a fulcrum.

When the vacuum cleaner (not shown) is driven, air containing dust is sucked from the suction lower, but the area near the suction port at this time is the front brush I L 17. Both ends and shielding plate 21
Since the space is highly sealed, the degree of vacuum is high, and since the vacuum pressure is uniform across a wide area in the lateral direction, a large suction area can be obtained.

In particular, since the shielding plate 21 is made of a flexible material, it comes into close contact with the surface to be cleaned due to the suction pressure, further improving the above-mentioned sealing performance. It acts so that the dust absorption effect does not decrease excessively even if the

Therefore, when the suction tool main body 1 is moved back and forth, the brush portion 1 of the front brush 11 is moved backward (in the pulling direction).
1. It has the effect of scooping up thread waste, cotton waste, etc. on the rug, and when it moves forward (in the pushing direction), the thread waste and cotton waste that have been stirred up come off the brush part 11b and are sucked into the suction lower part. It will be done.

Next, when the rear part of the external operating knob 15 is pressed against the biasing force of the leaf spring 19, the rear part of the connecting part 13 is pressed by the pressing part 18 on the lower surface of the knob, so that the connecting part 13 is pivoted. The rear brush 12 protrudes from the bottom surface of the sled 2 by tilting rearward about the portion 133 as a fulcrum.

In this state, you can drive the vacuum cleaner and clean the floor surface.

In this case, when the suction device is placed on the floor, the
If the tip of the rear brush 12 is structured to protrude by about 2 to 3 mm from the plane formed by the front wheels 8, 8 and the rear wheels 9, even if the suction device is strongly pressed against the floor surface, the plane formed by the front and rear wheels will not disappear. The brushing effect is further enhanced because the rear flange 12 does not fall sideways and its tip touches the floor surface (tatami surface) at right angles.

In the above configuration, the point that the front brush 11 is used for carpet cleaning will be explained.

Generally, when the suction tool moves forward, the rear brush 12 tends to be pressed against the surface to be cleaned, and conversely, when the suction tool moves backward, the rear brush 12 tends to rise above the surface to be cleaned.

Therefore, for example, when the rear brush 12 is tilted forward and used for carpet cleaning, when the suction tool moves forward, the forwardly tilted tip of the rear brush is pressed against the carpet and bites into it, resulting in extremely large resistance from the carpet.
There is a problem in the smoothness of work.

On the other hand, the front brush 11 is tilted backward,
Lint adhering to the carpet when the suction tool moves backwards,
By removing cotton dust, etc., the rear brush side of the suction device of the front brush 11 is slightly raised, so that the tip of the front brush 11 can effectively scrape up lint, cotton dust, etc. on the carpet. The resistance caused by the carpet is also much smaller than when using the machine, allowing for smoother work.

According to the present invention as described above, when cleaning a carpet, by protruding the front brush whose tip is inclined toward the rear, lint, fluff, etc. adhering to the carpet can be effectively swept up and removed from the suction port. It can be suctioned, and the frictional resistance with the carpet is only on one side, and by using the front brush, there is less resistance to back and forth movement, making it possible to work more smoothly. By protruding only the rear brush to clean the floor, dust on the floor can be effectively guided to the suction port and cleaned efficiently, which is an excellent idea in practical terms.

[Brief explanation of the drawing]

FIG. 1 is a side cross-sectional view of the suction device of the present invention, FIG. 2 is a half-cut back view of the suction device of the present invention, and FIG. 3 is a cross-sectional view taken along line X-x' in FIG. 2. 1...Suction tool body, 2...Sled, 7.
...Suction port, 11...Front brush, 12.
... Rear brush, 13 ... Connection part, 13.
...Shaft part, 15...External operation knob, 1
7, 18...Press section.

Claims (1)

[Scope of utility model registration request] In a device in which a front brush and a rear brush are provided before and after the suction port, the front and rear brushes are provided so as to be able to appear and retract, while the front and rear brushes are controlled by an external control device that switches between carpet cleaning and floor cleaning. A suction tool for a vacuum cleaner, characterized in that the front brush is configured to selectively protrude, and the front brush has a tip inclined rearward.