JPH07321A - Vacuum cleaner suction device - Google Patents

Abstract

(57) [Summary] [Purpose] To block a part of the suction port and increase the wind speed of the suction air flow. [Structure] The motor 37 is driven to rotate the rotary brush 23. The closing body 39, which is symmetrically attached to the surface of the rotating brush 23 by 180 degrees, opens and closes the left and right halves of the suction port 22 alternately. The opening area of the suction port 22 becomes half.
A fast suction air flow is generated on the opening side of the suction port 22. Inhale efficiently without leaving dust.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction device having a rotating brush for a canister type or upright type vacuum cleaner.

[0002]

2. Description of the Related Art Conventionally, a suction device for an electric vacuum cleaner is shown in FIG.
9, the suction device body 3 including the upper case 1 and the lower case 2 rotatably supports the rotating brush 4, the motor 5 for rotating the rotating brush 4, and the motor 5
And a protection circuit board 6 as a safety device.

A rubber blade (or bristle brush) 7 for scraping up dust is attached to the outer peripheral surface of the rotary brush 4, and is rotated by a motor 5 via a timing belt 8. The dust scraped up by the rubber blade (or bristle brush) 7 from the suction port 9 by the rotation of the rotary brush 4 is sucked by the suction air flow generated by the suction force of the blower (not shown) on the cleaner body side. Dust is collected in the cleaner body through the pipe 10.

[0004]

With regard to the suction performance of the vacuum cleaner, except for the suction force of the vacuum cleaner body (performance of the blower), the suction ability of the rotary brush 4 of the suction device and the suctioned dust are sucked. Is determined by the wind speed of the suction air flow near the suction port 9.

However, regarding the scraping ability of the rotary brush 4, various ideas such as the shape and hardness of the rubber blade or the bristle brush of the rotary brush 4 have been conventionally used. The improvement was almost at its limit.

On the other hand, regarding the suction air flow at the suction port 9, the size of the opening area of the suction port 9 determines the magnitude of the wind speed of the suction air flow (the smaller the suction port, the higher the wind speed).
The size of the suction port 9 needs to be within a range in which the blade 7 of the rotary brush 4 does not hit the suction port 9, so that the opening area of the suction port 9 cannot be reduced and a large wind speed cannot be obtained. It was

In view of the above, it is an object of the present invention to provide a suction device for an electric vacuum cleaner which improves the suction performance by increasing the wind speed of the suction air flow at the suction port.

[0008]

The means for solving the problems according to claim 1 of the present invention is the suction port 2 on the bottom surface 21 of the suction device body 20.
2 is formed, and the rotating brush 23 is attached to the suction device body 20.
Is provided, and a plurality of closing bodies 39 for closing a part of the suction port 22 are attached to the outer peripheral surface of the rotating brush 23 along the axial direction.

According to a second aspect of the present invention, the closing means 39 and the cleaning body 40 for scraping up dust on the floor are alternately mounted on the same circumference of the outer peripheral surface of the rotary brush 23. .

According to a third aspect of the present invention, a substantially semicircular closing body 39 is provided on the outer peripheral surface of the rotary brush 23 in the axial direction.
They are attached symmetrically with respect to 80 degrees.

According to a fourth aspect of the present invention, the means for solving the problem is the closing body 3
The surface of 9 is the wiping member 41 from the floor.

[0012]

In the means for solving the problems according to claim 1, when cleaning the floor surface, the motor 37 is driven to rotate the rotary brush 2.
When 3 is rotated, the closing body 39 of the rotating brush 23 closes a part of the suction port 22 and the rest is opened. Therefore, the opening area of the suction port 22 is reduced, so that a fast suction air flow is obtained and the suction performance is improved.

In the means for solving the problem according to the second aspect, the obstruction body 39 obstructs a part of the suction port 22 and the cleaning body 40 scrapes dust on the floor surface from the remaining opening side of the suction port 22. Can inhale efficiently.

In the means for solving the problem according to the third aspect, every time the rotary brush 23 rotates 180 degrees, the suction port 22 is alternately switched between the open side and the closed side, so that dust can be sucked without leaving dust.

In the means for solving the problem according to the fourth aspect, since the wiping member 41 can perform the wiping cleaning from the floor surface of the surface of the closing body 39, the dust suction and the wiping cleaning can be performed at the same time.

[0016]

1 is a perspective view of a rotary brush of a suction device of an electric vacuum cleaner according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the suction device of this embodiment, and FIG. 3 is a cross-sectional view of the suction device. FIG. 4 is a cross-sectional view of the suction device in a state where the closing body of the rotary brush closes the suction port, and FIG. 5 is a diagram showing the relationship between the wind speed near the suction port and the rotation time of the rotary brush.

As shown in FIGS. 2 and 3, the suction device for the electric vacuum cleaner of this embodiment has a suction port 2 on the bottom surface 21 of the suction device main body 20.
2 is formed, and the rotating brush 23 is provided on the apparatus main body 20. The suction device body 20 includes an upper case 24.
And a lower case 25, and a bumper 26 is provided on the outer periphery of the device body 20. The lower case 25 has the rectangular suction port 22, the rotary brush 23 is arranged so as to face the suction port 22, and a suction pipe 27 is rotatably supported at the rear portion. Then, the suction port 22 passes from the suction flow path 28 through the suction port pipe 27, and communicates with a dust collecting chamber (not shown) in the cleaner body via an extension pipe and a hose.

As shown in FIG. 1, the rotating brush 23 includes a rotating body 29 formed in a cylindrical shape and horizontal shafts 30 inserted into both ends of the rotating body 29, and both ends are fitted in a holder 31. Has been done. The horizontal shaft 30 is rotatably supported by a bearing 32, and the bearing 32 supports the bearing support portion 33 of the lower case 25.
Is fitted to. A gear 34 is externally fitted and fixed to one of the holders 31, and a gear 37 is externally fitted and fixed to a rotary shaft 36 of a rotary brush driving motor 35 arranged rearward of the suction port 22. The endless belt 38 is stretched between the motor 37 and the gear 37 of the motor 35, and the rotary brush 23 is rotationally driven by the motor 35.

On the outer peripheral surface of the rotating body 29, a closing body 39 for closing a part of the suction port 22 and a cleaning body 40 for scraping up dust on the floor are attached along the axial direction. .

The closing body 39 is formed in a substantially semicircular shape,
The rotary brush 23 is attached at two locations symmetrically by 180 degrees in the rotational axis direction so as to divide the rotary brush 23 into two parts, and the closing body 39 is formed to have a thickness so as to slightly project from the suction port 22 to the floor surface side. Then, the rotating brush 23 rotates, and the closing body 39 closes half of the suction port 22 in the rotation axis direction.
Is rotated 180 degrees, the other closing body 39 closes the opposite half of the suction port 22. In addition, the surface of the closing body 39 is wiped from the floor surface such as felt or sponge with the wiping member 4
It is formed of 1.

The cleaning member 40 is a plate-shaped blade made of rubber or vinyl chloride, and spirally protrudes on the outer peripheral surface of the rotating member 29 at a 180-degree symmetrical position where the closing member 39 is not provided. Has been done. And the blade 40
Is formed so as to project from the suction port 22 to the floor surface side and contact the floor surface.

In the figure, 42 is a protective circuit board, 43 is a front wheel, and 44 is a rear wheel.

In the above structure, when cleaning the floor,
The motor 37 is driven to rotate the rotary brush 23. Then, the closing body 39 of the rotary brush 23 alternately opens and closes the left and right halves of the suction port 22 every half rotation of the rotary brush 23, as shown in FIG. At this time, the opening area of the suction port 22 becomes half, and the velocity of the suction air flow generated on the opening side of the suction port 22 is about the wind speed at the full opening of the suction port 22 as shown in FIG. It's twice as fast. The wind speed on the closed side of the other suction port 22 is a value close to 0 although it is not completely sealed.

Here, when the rotating operation of the rotary brush 23 is momentarily observed, when half of the suction port 22 is opened, the other half of the suction port 22 is closed by the closing body 39. Only half of the suction port 22 can be used for cleaning. However, the rotation speed of the rotary brush 23 is as high as about 5000 rpm, and the speed at which the user moves the suction device body 20 at the time of cleaning is about 0.5.
Since the speed is as low as m / sec, the dust is actually sucked through all the openings of the suction port 22, so that the cleaning ability is not deteriorated and there is no problem.

Then, the blade 40 scrapes dust on the floor surface from the opening side of the suction port 22, the dust is sucked up to the cleaner body side by the fast suction air flow, and the closing body 39 causes the other half of the suction port 22. And the wiping member 41 wipes the floor surface from the floor surface.

In this way, by closing half of the opening of the suction port 22 with the closing body 39, the other suction port 22
The air velocity of the suctioned air flow from the opening side of the is doubled, and the suction performance of the cleaner is improved.

Further, the closing body 39 is formed in a substantially semicircular shape,
When the rotary brush 23 is mounted 180 degrees symmetrically with respect to the rotation axis direction, the suction port 2 is rotated every time the rotary brush 23 rotates 180 degrees.
Since the left and right halves of 2 can be quickly opened and closed alternately, dust is not sucked and left on the closed side of the suction port 22. Moreover, since the blade 40 is attached to the rotary brush 23 at a position where the closing body 39 is not attached,
You can scrape out dust and inhale it efficiently.

Further, since the wiping member 41 can be used for wiping and cleaning from the floor surface of the closing body 39, dust can be sucked in and wiped off at the same time, and the closed side of the suction port 22 is not wasted.

The present invention is not limited to the above embodiments, and it goes without saying that many modifications and changes can be made to the above embodiments within the scope of the present invention.

For example, in the present embodiment, the obstruction body 39 is attached at two locations symmetrically by 180 degrees along the rotation axis direction of the rotary brush 23, but it may be provided at three locations or more as shown in FIG. Also, as shown in FIG. 7, the mounting angle is
It may be divided by 120 degrees.

The closing body 39 may be densely formed using a bristle brush. Further, the cleaning body 40 is not limited to the blade, and may be a bristle brush.

[0032]

As is apparent from the above description, according to the first aspect of the present invention, by closing a part of the suction port with the closing member, the opening area of the suction port becomes small, so that the suction port which is not blocked can be used. The wind speed of the suctioned airflow from the opening side becomes faster. Therefore, the suction force of dust is increased and the suction performance of the vacuum cleaner is improved.

According to the second aspect, since the dust is scraped up by the cleaning member from the opening side of the suction port, the dust can be sucked efficiently.

According to the third aspect of the present invention, since the closing body is formed in a substantially semicircular shape and is attached symmetrically with respect to the rotational axis direction of the rotary brush by 180 degrees, the suction port is provided every time the rotary brush rotates by 180 degrees. The opening side and the closing side of can be switched quickly and alternately. Therefore, since the suction port is not always closed, dust is not left unsucked and cleaning can be performed effectively.

According to the fourth aspect, there is an excellent effect that the wiping and cleaning can be performed at the same time when dust is sucked by the wiping member from the floor surface of the closing body, and the closed side of the suction port is not wasteful.

[Brief description of drawings]

FIG. 1 is a perspective view of a rotating brush of a suction device of an electric vacuum cleaner according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the suction device of this embodiment.

FIG. 3 is a sectional view of the suction device.

FIG. 4 is a cross-sectional view of the suction device in a state where the closing body of the rotating brush closes the suction port.

FIG. 5 is a diagram showing the relationship between the wind speed of the suction air flow from the suction port and the rotation time of the rotary brush.

FIG. 6 is a perspective view of a rotary brush showing another embodiment.

FIG. 7 is a perspective view of a rotary brush showing another embodiment.

FIG. 8 is a cross-sectional view of a suction device of a conventional vacuum cleaner.

FIG. 9 is a sectional view of a conventional suction device.

[Explanation of symbols]

 20 Suction Device Main Body 21 Suction Device Bottom 22 Suction Port 23 Rotating Brush 39 Closing Body 40 Blade 41 Wiping Member from Floor

Claims (4)

[Claims] 1. A suction port is formed on a bottom surface of a suction device main body, a rotary brush is provided on the suction device main body, and a plurality of occluding bodies for blocking a part of the suction port are provided on an outer peripheral surface of the rotary brush. A suction device for an electric vacuum cleaner, which is mounted along a direction. 2. The vacuum cleaner according to claim 1, wherein a closing body and a cleaning body for scraping up dust on the floor are alternately mounted on the same circumference of the outer peripheral surface of the rotating brush. Suction device. 3. The suction device for an electric vacuum cleaner according to claim 1, wherein a substantially semicircular closing member is attached to the outer peripheral surface of the rotating brush symmetrically by 180 degrees in the axial direction. 4. The suction device for an electric vacuum cleaner according to claim 1, wherein the surface of the closing body is a wiping member from the floor surface.