JP2003093282A - Suction nozzle for vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suction nozzle for a vacuum cleaner which can remove dust on a floor by the wall efficiently. SOLUTION: In this suction nozzle 1, a suction port 6 is opened from the lower surface at least to a part of the front surface of a suction body case 2, a cover composing the front wall of the suction body case 2 is fixed at the suction body case 2 so as to be freely turned vertically, and the cover 5 blocks the front side part of the suction port 6 at the lower turned position and releases the front side part of the suction port 6 at the upper turned position.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a suction tool for a vacuum cleaner. More specifically, the present invention relates to a suction device for an electric vacuum cleaner that can effectively remove dust accumulated around a wall.

[0002]

2. Description of the Related Art A floor suction device for a commonly used electric vacuum cleaner has a suction opening only on the lower surface of the suction main body case, so that it can be used for vertically extending objects such as near a wall or near the feet of furniture. It was difficult to clean a nearby place. Therefore, as a suction tool that can be cleaned near the wall, when the suction tool is pressed against the wall, a bumper or flap provided on the front surface of the suction tool opens forward or tilts backward,
BACKGROUND ART A suction tool having a structure capable of sucking dust near a wall has been conventionally proposed.

[0003]

However, even if the front surface of the suction tool is opened and suction is performed, the horizontal distance between the front wall of the suction tool and the suction port is not close to each other. I couldn't get enough cleaning ability.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a suction tool for an electric vacuum cleaner capable of efficiently removing dust accumulated on a wall or the like.

[0005]

A suction tool for a vacuum cleaner according to the present invention is a suction tool for a vacuum cleaner in which a suction port is formed at least on a lower surface of a suction body case, and the suction port is
A cover that opens from the lower surface to at least a part of the front surface of the suction body case and that constitutes a front wall of the suction body case is attached to the suction body case so as to be vertically rotatable, and the cover is rotated downward. The front portion of the suction port is closed at the position, and the front portion of the suction port is opened at the upper rotation position.

It is preferable that at least a portion below the front end portion of the cover is formed to have a substantially arc shape.

There is provided operation means for moving the rotary brush forward when the cover rotates upward and for moving the rotary brush backward when the cover rotates downward. preferable.

It is preferable that a biasing means for biasing the cover downward is further provided.

In the present specification, the term "wall surface" is a broad concept including not only the wall surface of a building but also a vertically extending surface such as furniture and electric appliances.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION A suction tool for a vacuum cleaner according to the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view showing an embodiment of a suction tool for an electric vacuum cleaner according to the present invention, and FIG. 2 is a side view of the suction tool of FIG.
3 is a sectional explanatory view showing a state where the cover of the suction tool of FIG. 1 is closed, FIG. 4 is a sectional explanatory view showing a state of the cover of the suction tool of FIG. 1, and FIG. 5 is a sectional view of the suction tool of FIG. The figure which looked at the cover connection part from the bottom, FIGS. 6-7 is sectional explanatory drawing which shows other embodiment of the suction tool for electric vacuum cleaners of this invention, FIG. 8 is an enlarged view of the principal part inside a suction tool of FIG. 9 is an enlarged view of a main part inside the suction tool of FIG. 7, and FIGS. 10 to 11 are enlarged views of a main part inside the suction tool when an electric motor is used as a drive unit of the rotating brush of FIGS.

The suction tool 1 shown in FIGS. 1 to 5 has a suction main body case 2 having a suction port 6 formed in a wide area from the lower surface to the front surface, and bearing portions 7 (at both ends inside the suction main body case 2). (See FIG. 5), a rotating brush 3 rotatably supported via the bend body 4, a bend 4 rotatably and swingably connected to the rear surface of the suction body case 2, and a front portion 6b of the suction port 6 of the suction body case 2. And a cover 5 forming a front wall of the suction body case 2 for closing the suction main body case 2.

The cover 5 is made of a hollow body made of synthetic resin or the like, and as shown in FIGS.
Arm portions 8 are projected on both sides, and the arm portions 8 on both sides are respectively supported by shaft portions 9 projected on both ends of the suction body case 2 so as to be vertically rotatable.

The shape of the cover 5 is not particularly limited in the present invention and may be any shape, for example, as shown in FIG.
As shown in FIGS. 4 to 4, at least the front end portion 5a located at the foremost position is the rotation center of the cover 5 so that the cover 5 can rotate upward when pressed by the wall W or the like. It is preferably located above 9.

For example, the cover 5 shown in FIGS.
Has a portion 5b having a substantially arcuate shape (so-called sled shape) formed downward from the front end portion 5a. Since the arcuate portion 5b continuously rises while contacting the wall W, the cover 5 can be reliably raised.

The rotating brush 3 shown in FIGS. 3 to 4 is rotatably supported inside the suction body case 2 at a position slightly protruding from both the lower portion 6a and the front portion 6b of the suction port 6.

As shown in FIGS. 3 to 5, the rotating brush 3 may be a rotating brush which has been conventionally used, and four grooves 10 are provided in the longitudinal direction of the outer periphery at 90 ° intervals and spirally. The rotary shaft 11 is engraved into a strip shape, and the strip-shaped pile material 12 is embedded along the groove 10. The rotating brush 3 can be rotated by transmitting the driving force of the electric motor 13 incorporated in the suction body case 2 via a transmission belt (not shown) or the like. Alternatively, an opening may be formed above the rotary brush 3 of the suction main body case 2 to take in outside air, and the outside air sucked from the opening may be received by a pile material of the rotating brush to rotate the rotating brush.

In the suction tool of the present embodiment configured as described above, the cover 5 is lowered to its lower position by its own weight as shown in FIG. 3 in the case of normal floor cleaning. The front portion 6b of the suction port 6 is closed by the cover 5 with good sealing property, and only the lower portion 6a of the suction port 6 is open. Therefore, since there is no loss of air volume, a desired air volume can be obtained in the lower portion 6a, and the scraping effect of the rotary brush 3 is also added, so that the floor surface can be cleaned efficiently.

On the other hand, as shown in FIG. 4, when cleaning the edge of the wall, the suction tool 1 is pressed against the wall W. Thereby, first, the front end portion 5a of the cover 5 comes into contact with the wall W to lift the cover 5 upward, and further, the arc-shaped portion 5b.
While sliding on the wall surface, the cover 5 rotates above the suction tool 1 with the shaft portion 9 as a fulcrum, and as a result, the front portion 6b of the suction port 6 can be opened.

In the state shown in FIG. 4, the suction tool 1 can be made to have a very close horizontal distance between the cover 5 constituting the front wall and the front side portion 6b of the suction port 6, which is sufficient for dust near the wall. Cleaning ability can be obtained. Moreover, since the dust near the wall can be sucked from both the lower portion 6a and the front portion 6b of the suction port 6, and the rotating brush 3 approaches or abuts against the wall W to scrape the dust near the wall, the dust near the wall can be removed. Can be efficiently removed.

When the cleaning of the wall is ended and the normal cleaning of the floor is resumed, the suction tool 1 is simply separated from the wall W, and the cover 5 rotates downward due to its own weight to move the front portion 6b of the suction port 6 into contact. Since it closes with a good sealing property, the normal floor surface can be cleaned again.

In the case of normal floor cleaning,
Even when there is a step, the arcuate portion 5b of the cover 5 can slide on the step, so that the suction tool 1 can easily get over the step.

As described above, the cover 5 can be rotated downward by itself to close the front portion 6b of the suction port 6 with a good sealing property, but a cover such as a rotating spring for rotating the cover 5 downward is provided. By providing the biasing means, the front portion 6b can be reliably closed even if some dust is attached to the rotating shaft of the cover 5.

Further, as another embodiment of the present invention,
The suction tool 21 shown in FIGS.
2 for closing the front part 23b of the suction port 23 of
4 is further provided with operation means 26 for moving the rotary brush 25 in the front-back direction.

That is, both ends of the rotary shaft 27 of the rotary brush 25 are rotatably supported by bearings 29 having a substantially rectangular shape. Since the bearing portion 29 is rotatably supported by the slit 30 extending in the front-rear direction inside the suction body case 22, the rotary brush 25 can be slightly moved in the front-rear direction.

As shown in FIGS. 6 to 9, the operating means 26 is rotated in conjunction with the vertical movement of the cover 26, so that a pair of cams 28 can come into contact with the bearing portions 29 at both ends of the rotary brush 25. And a compression coil spring 31 disposed in the slit 30 inside the suction body case 22 for biasing the rotary shaft 27 rearward.

When cleaning the wall by the operation means 26, as shown in FIG. 7, the cam 28 interlocks with the upward rotation of the cover 24 and resists the urging force of the compression coil spring 31. While bearing 29 and rotating shaft 27
By pressing forward, the rotating brush 22 can be moved forward. Therefore, the rotating brush 22
Can be brought into closer contact with the wall W or more strongly, so that the scraping effect of the rotary brush 22 can be further improved.

On the other hand, when the cleaning near the wall is completed, as shown in FIG. 6, the cam 28 is retracted from the bearing portion 29 in conjunction with the downward rotation of the cover 24, and the urging force of the compression coil spring 31 is exerted. Thus, the rotary brush 25 can be moved backward and returned to a predetermined position inside the suction body case 22.

Since the suction tool 21 shown in FIGS. 6 to 9 uses the suction pressure of the vacuum cleaner to rotate the rotary brush 25, the internal structure of the suction tool 21 is simple and the rotary shaft 27 is Movement in the front-back direction does not significantly affect the rotation of the rotary brush 25. However, when the rotating brush 25 is driven by an electric motor, it is necessary to adjust the power transmission system in conjunction with the movement of the rotating brush 25.

For example, when power transmission is performed using a transmission pulley 32 as shown in FIGS. 10 to 11, a drive pulley 33 fixed to an electric motor (not shown) and a rotary shaft 27 of a rotary brush 25 are fixed. The transmission pulley 32 is hung on the driven pulley 34 and the tension pulley 35 that adjusts the tension of the transmission pulley 32. The tension pulley 35 is linked to the cam 28 via a link bar 36.

Therefore, in the state shown in FIG. 10 (that is, when the cover 24 is closed), the cam 2 is placed in order to dispose the rotary brush 25 at the rear position (the right position in the drawing).
8 rotates counterclockwise and retracts from the bearing 29. At this time, the distance between the drive pulley 33 and the driven pulley 34 becomes short, but as a result of the tension bar 36 and the tension pulley 35 being pushed upward, the transmission pulley 32 can maintain a predetermined tension.

On the other hand, in the state of FIG. 11 (that is, when the cover 24 is open), the cam 28 rotates clockwise in order to dispose the rotating brush 25 at the front position (the left position in the drawing). The bearing portion 29 is pressed forward (to the left in the drawing). At this time, the distance between the drive pulley 33 and the driven pulley 34 becomes long, but the tension bar 36 and the tension pulley 35 are pulled down, so that the transmission pulley 32 can maintain a predetermined tension.

In the above embodiments, the floor suction tool having the rotating brush has been described as an example, but the present invention is not limited to this, and the floor suction tool having no rotating brush. The present invention can also be applied to.

[0034]

As described above, in the floor suction device of the present invention, when cleaning the wall, the horizontal distance between the cover forming the front wall of the suction device and the front portion of the suction port is very close. Therefore, it is possible to obtain sufficient cleaning ability for dust on the wall. Moreover, since both the suction force of the vacuum cleaner and the scraping effect of the rotary brush can be utilized, it is possible to efficiently remove dust accumulated on the wall or the like.

[Brief description of drawings]

FIG. 1 is a plan view showing an electric vacuum cleaner according to an embodiment of a suction tool of the present invention.

2 is a side view of the suction device in FIG. 1. FIG.

3 is a cross-sectional explanatory view showing a state where the cover of the suction tool of FIG. 1 is closed.

4 is a cross-sectional explanatory view showing a state where a cover of the suction tool of FIG. 1 is opened.

5 is a view of the cover connecting portion of the suction tool of FIG. 1 seen from below.

FIG. 6 is a sectional explanatory view showing another embodiment of the suction tool for the electric vacuum cleaner of the present invention.

FIG. 7 is a cross-sectional explanatory view showing another embodiment of the suction tool for the electric vacuum cleaner of the present invention.

FIG. 8 is an enlarged view of a main part inside the suction device of FIG.

FIG. 9 is an enlarged view of a main part inside the suction tool of FIG. 7.

10 is an enlarged view of a main part inside a suction tool when an electric motor is used as a drive unit of the rotary brush of FIG.

11 is an enlarged view of a main part inside the suction tool when an electric motor is used as a drive unit of the rotary brush of FIG. 7.

[Explanation of symbols]

1 suction tool 2 Suction body case 3 rotating brush 4 Bend 5 cover 6 Suction port

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Ritsuzo Kobayashi             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. (72) Inventor Yoshihiro Mori             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. (72) Inventor Hiromichi Matsuhashi             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. (72) Inventor Chiyoyo Matsumoto             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. F term (reference) 3B061 AA06 AA45 AD05 AD11

Claims (4)

[Claims] 1. A suction tool for an electric vacuum cleaner in which a suction opening is formed at least on a lower surface of a suction body case, wherein the suction opening is opened from a lower surface of the suction body case to at least a part of a front surface thereof. A cover constituting a front wall of the main body case is attached to the suction main body case so as to be vertically rotatable, and the cover closes a front portion of the suction port at a lower rotation position and at an upper rotation position. A suction tool for a vacuum cleaner configured to open a front portion of a suction port. 2. The suction tool for a vacuum cleaner according to claim 1, wherein at least a portion below the front end portion of the cover is formed to have a substantially arc shape. 3. An operating means for moving the rotating brush forward when the cover rotates upward and moving the rotating brush backward when the cover rotates downward. The suction tool for an electric vacuum cleaner according to claim 1 or 2. 4. The urging means for urging the cover downward in a rotating direction is further provided.
The vacuum cleaner suction tool described.