JPH10173A - Floor brush for electric vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric vacuum cleaner which assures an enhanced sound isolation effect by forming an outlet for exhaust air from a blower fan under a floor surface suction tool, allowing the dust on the floor surface to fly so as to lead to enhancement of the sucking performance, and allowing part of the bumper to dangle to the floor surface. SOLUTION: A floor brush for an electric vacuum cleaner is composed of a connection pipe 22 located in the rear to be connected to the body 20 of cleaner machine through a hose 21, a brush accommodation chamber 26 located in front to accommodate a rotary brush 31 and having an open upper part 29 and a suction opening 30, a driving member such as motor, turbine, etc., to drive the rotary brush 31, a blower fan 37 accommodated in a wind sending chamber 28 mounted on the driving member through a shaft 36, and an opening/ closing lid 51 enclosing the open upper part 29 in such a way as removably. The lid 51 is furnished with a wind duct 53 leading from the chamber 28 to near the suction hole 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor suction tool for a vacuum cleaner having a rotary brush, and more particularly to an improvement in dust suction performance from a cleaning surface.

[0002]

2. Description of the Related Art Conventionally, floor suction devices for a vacuum cleaner of this type include, for example, Japanese Utility Model Publication No. 54-38786 and Japanese Utility Model Application No. 7-6941 (Japanese Utility Model No. 3019056). FIG. 10 shows the structure of a floor suction device for a vacuum cleaner disclosed in Japanese Utility Model Publication No. 54-38786.
This will be described below with reference to FIGS.

FIG. 10 is an internal structural view showing a conventional floor suction device for a vacuum cleaner, FIG. 11 is a sectional view taken along the line AA of FIG.
2 is a sectional view taken along the line BB in FIG. In the figure, 1 is a floor suction tool, 2 is a rotary brush, 4 is a brush cover surrounding the circumference of the rotary brush 2 and has a suction portion 3 at a lower portion, 5 is a turbine case, and 6 is one end opened to the brush cover 4. A turbine nozzle having the other end opened to the turbine case 5, a turbine 7 rotatably supported in the turbine case 5, and a floor nozzle 8 attached to the turbine case 5 and connected to an extension pipe (not shown). A pipe, 9 is a fan case fixed to the turbine 7, 10 is an exhaust fan arranged in the fan case 9, 11 is a nozzle connected to a discharge port of the fan case 9 and opened near the suction part 3, 12 Is a shaft of the turbine 7, and 13 is a drive belt stretched between the shaft 12 and the rotating brush 2.

In the above configuration, when the operation of the vacuum cleaner (not shown) is started, the outside air enters through the suction portion 3 and is sucked by the vacuum cleaner body (not shown) while rotating the turbine 7. At this time, the rotating brush 2 and the exhaust fan 10 also rotate with the rotation of the turbine 7. In particular, the suction air from the exhaust fan 10 is discharged from the nozzle 11 opened near the suction portion 3 to reach the rotating brush 2. At the same time, the dust in the non-existing portion is blown off, and at the same time, is sucked together with the outside air entering the suction portion 3. As a result, dust that accumulates in corners of the room that the rotating brush 2 cannot reach can be reliably sucked.

However, in this configuration, it is difficult to remove the hair from the rotating brush 2 when the hair or the like is entangled with the rotating brush 2. The point that the hair is easily removed from the rotating brush is described, for example, in JP-B-61-49.
No. 967 is disclosed, and its configuration is shown in FIG.
3 will be described.

FIG. 13 is a plan view showing another conventional floor suction device for a vacuum cleaner. In the figure, reference numeral 14 denotes an opening / closing lid for taking out the rotating brush from the main body case 15, which is detachably provided at an upper front part of the main body case 15. 16
Is a stopper for detachably forming the opening / closing lid 14 on the main body case 15. With this configuration, the rotating brush can be easily taken out of the main body case 15, and cleaning of the rotating brush becomes easy. However, in the conventional configuration shown in FIG. 13, it was impossible to suck the dust on the front surface of the main body case 15 by the rotating brush. In addition, since the floor suction device always moves on the cleaning surface and cleans it, the floor suction device easily collides with a chair or table placed in a room, a wall surface, a sill, or the like. Then there was a risk of deformation or falling off.

Further, in the floor suction device for a conventional vacuum cleaner shown in FIGS. 10 to 12, outside air other than the suction air discharged from the nozzle 11 is sucked into the suction portion 3, but the suction air is sucked. The structure for preventing the outside air other than the above from being sucked into the suction portion is described in, for example, Japanese Utility Model Publication No. 39-3655.
It is disclosed in Japanese Patent Publication No. 3 and its configuration will be described below with reference to FIG.

FIG. 14 is a sectional view of a main part showing another conventional floor suction device for a vacuum cleaner. In the figure, reference numeral 17 denotes a shielding brush which is provided so as to hang down from the lower surface of the main body case 15 to the floor surface X, and is formed so as to surround the suction portion 3 and the nozzle 11. However, in this configuration, since the shielding brush 17 is provided in front of the suction unit 3, it is difficult for the shielding brush 17 to push or entangle the dust on the floor surface and to move the dust to the suction unit 3. Met. In order to prevent such a drawback, for example, it is conceivable that the shielding brush 17 is made of a soft material. However, since the exhaust pressure from the electric blower 19 housed in the cleaner main body 18 is strong, the shielding brush 17 can be easily formed. There is a possibility that the exhaust gas leaks from the shield brush 17 due to deformation. In addition, since the exhaust air from the electric blower 19 has a high temperature, a heat-resistant material must be used for the material of the shielding brush 17, which is expensive.

[0009]

In the floor suction device for a vacuum cleaner having the above structure, dust is left behind when the vacuum cleaner is operated, particularly when cleaning the corners of a room, the vicinity of a chair or a table. When the floor suction tool collided with furniture or the like, the main body case was deformed, or the opening / closing lid was dropped from the main body case. Furthermore, when operating the vacuum cleaner, the suction airflow noise from the floor suction tool leaks to the outside, resulting in a floor suction tool having a high noise value.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. By forming an exhaust outlet from a blower fan below a floor suction device, dust on the floor surface is lifted and sucked. The purpose of the present invention is to obtain a floor suction device for a vacuum cleaner capable of improving performance, and a floor suction device for a vacuum cleaner capable of improving a sound insulation effect by hanging a part of a bumper on a floor surface. And

[0011]

In the floor suction device for a vacuum cleaner according to the present invention, a main body case connected to a main body of the vacuum cleaner via a hose or the like and a rotary brush are housed in front of the main body case. A brush storage chamber having a suction port formed in a lower part and an upper part opened, an opening / closing lid for detachably covering an opening of the brush storage chamber, and a driving body for driving a rotating brush,
The vehicle includes a blower fan interlocked with a driving body via a shaft, and a blower chamber for housing the blower fan, and an opening / closing lid is provided with a ventilation passage for communicating the blower chamber with the vicinity of the suction port.

A part of the ventilation passage communicates with the brush storage chamber.

Further, an intake port is provided on one side of the blower chamber, and an intermediate port is provided on the other side, and a ventilation path of the opening / closing lid is detachably connected to the intermediate port.

Also, a main body case connected to the cleaner main body via a hose or the like and including an upper case and a lower case, a bumper made of a soft material interposed at a joint between the upper case and the lower case, A brush storage chamber that stores a rotating brush in the front and forms a suction port in the lower part and has an upper opening, and an opening / closing lid that removably covers an opening of the brush storage chamber,
A drive unit for driving the rotating brush, a blower fan interlocked with the drive unit via a shaft, and a blower chamber for accommodating the blower fan, provided on the opening / closing lid to communicate between the blower room and the vicinity of the suction port. A passage, a ventilation passage for connection provided in the bumper and communicating with the ventilation passage, and a ventilation passage for exhaust provided in the main body case having one end communicating with the connection ventilation passage and the other end communicating with the vicinity of the suction port. is there.

Further, an exhaust air passage is provided in the bumper so as to hang down to the vicinity of the floor to be cleaned, and the exhaust air passage communicates with the ventilation passage.

Further, the bumper is provided with a shielding piece hanging down near the floor to be cleaned, and an exhaust air path communicating with the ventilation path is provided between the shielding piece and the suction port.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. Embodiment 1 of the present invention is shown in FIGS. 1 to 6 and will be described with reference to these drawings. FIG. 1 is a perspective view of a floor suction device for a vacuum cleaner according to a first embodiment, and FIG.
, FIG. 3 is a bottom view, FIG. 4 is a perspective view showing an opening / closing lid of the floor suction tool, FIG. 5 is a cross-sectional view showing the floor suction tool, and FIG. FIG. 2 is a vertical sectional view of a floor suction tool. In the figure, arrows indicate the flow of outside air. In the figure,
20 is a vacuum cleaner body incorporating an electric blower (not shown),
Reference numeral 21 denotes a hose having one end connected to the cleaner body 20 and the other end connected to the extension tube 22. Reference numeral 23 denotes a floor suction device, and a connection pipe 24 formed at the rear is connected to the extension pipe 22.

Reference numeral 25 denotes a main body case formed by an upper case 25A and a lower case 25B.
A connection pipe storage chamber 27 for storing the front end portion 24A of the fourth and a blower chamber 28 are provided on the rear side. In the brush storage chamber 26, an upper opening 29 is formed on the upper surface and a suction port 30 is formed on the lower surface, and a rotating brush 31 rotatably supported at both ends is stored. And 32 is a rotating brush 3
A plurality of dust removing pieces attached to the outer surface of the rotary member 1, and the dust removing pieces 32 whirl dust on the floor surface X into the suction port 30 while rotating.

In the blower chamber 28, an intake port 33 communicating with the connection pipe 24 is formed at the rear, and an intermediate port 35 is formed above a boundary wall 34 with the brush storage chamber 26 at the front.
Reference numeral 37 denotes a blower fan, and the rotating brush 3
1 is fixedly accommodated in a shaft body 36 penetrating substantially parallel to the shaft member 1. 38 is a turbine 38A fixed to the end of the shaft 36
And is housed in the distal end portion 24A of the connection pipe 24. 39 is a brush storage chamber 26 and a connection pipe storage chamber 27
The sliding plate is disposed at the boundary portion 40 of the brush and freely changes the connection air path area between the brush storage chamber 26 and the connection pipe storage chamber 27. When the connection air path area is reduced, all outside air from the suction port 30 is removed. The turbine 38A is guided to rotate the turbine 38A. A knob 39 </ b> A provided at one end of the slide plate 39 protrudes outside the main body case 25. Reference numeral 41 denotes a belt that is wound around the other end of the shaft 36 and the end of the rotating brush 31 and that transmits the rotation of the driving body 38 to the rotating brush 31.

Reference numeral 42 denotes an exhaust ventilation passage formed inside the brush storage chamber 26 by forming a front wall 43 in front of the brush storage chamber 26 from the upper surface to the lower surface of the lower case 25B with respect to the floor surface. It extends substantially vertically. An outlet 44 is provided on the lower surface of the exhaust passage 42 and is disposed near the front of the inlet 30. Numeral 45 is a bumper made of a soft material sandwiched between the upper case 25A and the lower case 25B and also serving to seal the joint surface between the two cases. A connecting ventilation passage 46 is formed. 47 is bumper 45
Shielding piece made of a soft material that hangs substantially vertically from the bottom to the vicinity of the floor surface X. The front shielding piece 47A provided on the front portion of the bumper 45 and the side shielding pieces 47 provided on both side portions.
B.

Reference numeral 48 denotes a bottom surface of the lower case 25B,
Is a shielding member made of a soft material attached in parallel with the long axis direction, and hangs down to the vicinity of the floor surface X in the same manner as the shielding piece 47. 49 is a front wheel, and 50 is a rear wheel, which are provided on the bottom surface of the lower case 25B. 51 is a brush storage room 2
An opening / closing lid for detachably covering the upper opening 29 of the sixth with a stopper 52, the upper surface is formed by a double wall, and a ventilation passage 53 is provided in the internal space. One end 53A of the ventilation passage 53 is connected to the intermediate opening 35, and the other end is connected to the connection ventilation passage 4
6 respectively. The opening / closing lid 51 is a rotating brush 3
When hair, dust, or the like is entangled or adhered to 1, the rotating brush 31 is easily taken out of the brush storage chamber 26 so that the hair or the like can be easily removed. Reference numeral 54 denotes a plurality of auxiliary passages formed on a boundary surface 55 of the ventilation path 53 formed in the opening / closing lid 51 with the brush storage chamber 26, and communicates the ventilation path 53 with the brush storage chamber 26.

In the first embodiment of the present invention configured as described above, when the electric blower (not shown) in the cleaner main body 20 is operated, the outside air containing dust on the floor surface is supplied to the floor suction device 23. , The turbine 38A housed in the distal end portion 24A of the connection pipe 24 is rotated, and is sucked into the cleaner body 20 via the connection pipe 24, the extension pipe 22 and the hose 21. At this time, the blower fan 37 connected to the turbine 38A via the shaft 36 and the rotating brush 3 connected to the shaft 36 via the belt 41
1 also rotates.

With the rotation of the blower fan 37, outside air enters through the intake port 33, is accelerated, and is accelerated through the intermediate port 35.
The air is sent out into the ventilation passage 53 formed in the first air passage. Ventilation path 53
The outside air further passes through the connection ventilation passage 46 provided in the bumper 45, also passes through the exhaust ventilation passage 42 formed in the lower case 25B, and collides perpendicularly with the floor surface X from the air outlet 44. The dust on the floor X is blown up, enters the suction port 30 together with the dust, and receives the rotational force of the rotating brush 31 to connect the connection pipe 2.
4 to the cleaner body 1.

According to the first embodiment, the outside air is forcibly blown to the vicinity of the suction port 30 by the dedicated blower fan 37.
A ventilation passage for blowing off dust on the floor and forcibly sending the dust to the suction port 30 is provided in the opening / closing lid 51 for taking out the rotary brush 31, so that the dust suction performance near the suction port 30 is improved. Further, the floor suction device 23 is likely to collide with a chair or table placed in the room, a wall surface, a sill, or the like in order to always move on the cleaning surface and clean, but the opening / closing lid 51 is formed double. By doing so, the strength is greatly increased, and deformation and the like can be prevented. Further, by forming the opening / closing lid 51 doubly, the sound generated when the rotating brush 31 rotates and the sound of collision when the dust removing piece 32 collides with the floor surface X are blocked by the ventilation passage 53. Also, the effect of noise reduction can be achieved.

The upstream end of the ventilation passage 53 and the intermediate port 3
5, when the lid 51 is attached to the upper opening 29 of the opening / closing lid 51,
Since it is formed so as to be joined, no special operation such as alignment is required. That is, by attaching the opening / closing lid 51 to the upper opening 29, the outside air that has entered the ventilation chamber 28 through the intake port 33 is reliably blown into the ventilation path 53 through the intermediate port 35. It is needless to say that the provision of a soft member at the junction between the upstream end of the ventilation passage 53 and the intermediate port 35 can more reliably prevent leakage or intrusion of outside air.

Further, the front wall 43 of the brush storage chamber 26 is double-formed to provide a ventilation passage 42, and the bumper 45 has a ventilation passage 53 at one end of the opening / closing lid 51 and a ventilation passage 42 at the other end. Is provided, the outside air from the ventilation chamber 28 surely passes through the opening / closing lid 51 and enters the connection ventilation path 46, and is guided to the outlet 44 near the suction port 30. Can be Further, the floor suction device 23 easily collides with furniture or the like in the room at the time of the operation, but the deformation and breakage can be prevented because the front wall 43 is formed double.

Further, a plurality of auxiliary passages 54 formed in the ventilation passage 53 of the opening / closing lid 51 communicate the ventilation passage 53 and the brush storage chamber 26, so that the air outlet 44 and the suction port 30 are provided.
However, even if it is covered with paper or cloth, or the fur of a carpet,
Outside air enters the brush storage chamber 26 from the ventilation passage 53 via the auxiliary passage 54, and can rotate the turbine 38A without stopping. That is, even when the air outlet 44 and the suction port 30 are closed, the rotating brush 31 can rotate, so that the dust on the floor surface X is rolled up and reliably connected with the outside air from the auxiliary passage 54 to the connection pipe 24. Can be sucked into.

Embodiment 2 FIG. 7 is an enlarged cross-sectional view of a main part of a floor suction device for a vacuum cleaner according to a second embodiment of the present invention.
7 is an exhaust air passage formed between the front shield member 7 and the front shielding piece 47A provided on the bumper 45. Y is a carpet with relatively long hair.

When the floor suction device 23 is operated in this state,
The outside air that has passed through the opening / closing lid 51 enters the exhaust air path 56 via the connection ventilation path 46. At this time, the front shielding piece 47A
Holds down the fluff of the carpet Y, so that the closing of the exhaust air path 56 by the fluff of the carpet Y is prevented. That is, the outside air can surely enter the brush storage chamber 26.

Accordingly, the fur of the carpet Y blocks the entire suction port 30 and the vacuum pressure in the brush storage chamber 26 rises to adsorb the floor suction device 23 to the carpet Y. The brush enters the brush storage chamber 26 while moving the dust on the surface of the brush. For this reason, the vacuum pressure in the brush storage chamber 26 does not rise extremely, and the floor suction device 23 can move the carpet Y smoothly, and the rotating brush 31 also rotates to scrape out the dust inside the fur of the carpet Y. be able to. By providing a communication path 57A at the lower end of the front wall A57 for connecting the exhaust air path 56 and the suction port 30, even a carpet Y with a long bristle foot has a communication path 5A.
7A can be prevented from being blocked.

Embodiment 3 FIG. 8 is a longitudinal sectional view of a floor suction device for a vacuum cleaner according to a third embodiment of the present invention. In the figure, 58 serves as a front wall A57,
A rear shielding piece 59 made of a soft material provided on a bumper 45 for forming an exhaust air path 56 with the front shielding piece 47A.
Is a thin plate-like reinforcing piece that partially joins the front shielding piece 47A and the rear shielding piece 58 so that the exhaust ventilation path 56 cannot be shut off by contact with the rear shielding piece 58. Are formed. Although the front end of the front shielding piece 47A is substantially in contact with the floor surface X, the rear shielding piece 58 forms a gap between the front shielding piece 58A and the floor surface X. Since the piece 47A presses down the bristle feet, the exhaust air path 56 is not blocked.

In this state, even if the front shielding piece 47A is deformed toward the brush storage chamber 26 of the carpet Y with long hairs, the rear shielding piece 58 is also deformed toward the brush storage chamber 26 by the reinforcing piece 59. The exhaust air path 56 is secured, and the outside air is reliably sucked into the brush storage chamber 26 from the exhaust air path 56.

Embodiment 4 FIG. FIG. 9 is a partial cross-sectional view of a floor suction device for a vacuum cleaner according to a fourth embodiment of the present invention.
In the figure, 38A is a rotating brush 3 via a belt 41.
1 is a driving body constituted by a motor 60 for rotating the motor 1. The blower fan 37 is housed in the blower chamber 28 by the shaft 36 of the electric motor 60. In such a structure, by operating the electric motor 60, the blower fan 37 also rotates, and outside air enters from the intake port 33, passes through the intermediate port 35, enters the ventilation path 53 of the opening / closing lid 51, and enters the suction port. Sucked in 30. That is, the drive source for rotating the blower fan 37 is not limited to the turbine 38A, but may be any drive body as long as the blower fan 37 can rotate.

[0034]

As described above, the floor suction device for a vacuum cleaner according to the present invention forcibly blows outside air into the vicinity of the suction port by a special blower fan to blow off dust on the floor surface and forcibly. A ventilation passage for feeding into the suction port is provided on the opening / closing lid for taking out the rotating brush, so not only the dust suction performance near the suction port can be improved, but also if the floor suction tool collides with furniture etc. during cleaning. Damage and deformation of the open / close lid can be prevented. In addition, the ventilation path of the opening and closing lid, due to its internal air layer,
It can also be expected to have the effect of insulating the rotating sound generated from the rotating brush.

In addition, a part of a ventilation path for blowing outside air into the vicinity of the suction port is communicated with the brush storage chamber by a dedicated blower fan, so that even if the suction port is blocked by the fur of the carpet during cleaning. Since the outside air enters the brush storage chamber, the rotation of the rotating brush does not stop, and the cleaning of the floor surface can be continued.

Further, since the intermediate opening for blowing the outside air from the air blowing chamber and the ventilation passage of the opening / closing lid are connected so as to be detachable, the opening / closing lid can be detached from the main body case. The operation can be easily performed without joining the mouth and the ventilation path.

Further, a ventilation passage for connecting a bumper made of a soft material is provided in the middle of a ventilation passage for blowing outside air to the vicinity of the suction port by a dedicated ventilation fan, so that the ventilation passage for the opening / closing lid and the main body case are provided. This has the effect of reliably communicating with the exhaust ventilation path. Furthermore, even when the floor suction tool collides with furniture or the like, since the respective ventilation paths are formed by the double walls, it is useful for preventing deformation and breakage of the entire floor suction tool.

Further, since the bumper is provided with an exhaust air passage hanging down to the vicinity of the cleaning floor, the outside air forced to be blown to the blower fan can reliably blow off dust on the floor and move it to the suction port.

Further, a shielding piece is formed on the bumper so that its tip is substantially in contact with the floor surface, and an exhaust outlet from which the outside air blown by a dedicated blowing fan is discharged between the shielding piece and the suction port. Since the outside air on the floor surface outside the shielding piece is restricted from entering the suction port by the shielding piece,
The outside air from the blower fan blows up dust on the floor surface and can reliably move the dust to the suction port.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a vacuum cleaner according to Embodiment 1 of the present invention.

FIG. 2 is a perspective view showing a floor suction device for a vacuum cleaner according to Embodiment 1 of the present invention.

FIG. 3 is a bottom view showing the floor suction device for the vacuum cleaner according to Embodiment 1 of the present invention.

FIG. 4 is a perspective view showing an opening / closing lid of the floor suction device for a vacuum cleaner according to Embodiment 1 of the present invention.

FIG. 5 is a cross-sectional view showing the floor suction device for the vacuum cleaner according to Embodiment 1 of the present invention.

FIG. 6 is a longitudinal sectional view showing the floor suction device for the vacuum cleaner according to Embodiment 1 of the present invention.

FIG. 7 is a partially cutaway vertical sectional view showing a floor suction device for a vacuum cleaner according to Embodiment 2 of the present invention.

FIG. 8 is a longitudinal sectional view showing a floor suction device for a vacuum cleaner according to Embodiment 3 of the present invention.

FIG. 9 is a partially cutaway plan view showing a floor suction device for a vacuum cleaner according to Embodiment 4 of the present invention.

FIG. 10 is a perspective view of an internal structure showing a floor suction device for a conventional vacuum cleaner.

11 is a sectional view taken along line AA in FIG.

FIG. 12 is a sectional view taken along the line BB in FIG.

FIG. 13 is a plan view showing another conventional floor suction device for a vacuum cleaner.

FIG. 14 is a longitudinal sectional view of a main part showing another conventional floor suction device for a vacuum cleaner.

[Explanation of symbols]

23 floor suction device, 25 body case, 26 brush storage room, 28 blower room, 30 suction port, 31 rotating brush, 33 suction port, 35 middle port, 37 blower fan,
38 drive body, 42 exhaust passage, 43 front wall, 4
5 bumper, 46 air passage for connection, 47 shielding piece, 5
1 Opening / closing lid, 53 ventilation passage, 54 auxiliary passage, 56 exhaust air passage.

Claims (6)

[Claims] A main body case connected to the main body of the cleaner via a hose or the like; a brush housing chamber for housing a rotary brush in front of the main body case, forming a suction port in a lower part, and opening an upper part; An opening / closing lid that detachably covers the opening of the brush storage chamber, a driving body that drives the rotating brush, and a blower fan that is interlocked with the driving body via a shaft,
A floor suction device for an electric vacuum cleaner, comprising: a blower chamber for storing the blower fan; and a ventilation path that connects the blower chamber and the vicinity of the suction port to the open / close lid. 2. The floor suction device for an electric vacuum cleaner according to claim 1, wherein a part of the ventilation passage communicates with the brush storage chamber. 3. An air inlet through which outside air is sucked is provided on one side of the ventilation chamber, and an intermediate port communicating with the ventilation path is provided on the other side, and the ventilation path of the opening / closing lid is detachably connected to the intermediate port. The floor suction device for a vacuum cleaner according to claim 1, wherein: 4. A main body case connected to the cleaner main body via a hose or the like and comprising an upper case and a lower case; a bumper made of a soft material interposed at a joint between the upper case and the lower case; A brush accommodating chamber for accommodating a rotary brush in front of a case, forming a suction port in a lower portion, and opening an upper portion; an opening / closing lid for detachably covering the opening of the brush accommodating chamber; and a driver for driving the rotary brush And a blower fan interlocked with the drive body via a shaft, and a blower chamber that houses the blower fan, and a ventilation path provided in the opening / closing lid and communicating the blower chamber with the vicinity of the suction port. A connection ventilation passage provided on the bumper and communicating with the ventilation passage, and an exhaust ventilation passage provided on the main body case and having one end communicating with the connection ventilation passage and the other end communicating with the vicinity of the suction port. That Characteristic floor suction tool for vacuum cleaner. 5. The floor surface for an electric vacuum cleaner according to claim 4, wherein an exhaust air path is provided on the bumper so as to hang down to the vicinity of the floor to be cleaned, and the exhaust air path communicates with the ventilation path. Suction implement. 6. A bumper is provided with a shielding piece hanging down near a floor to be cleaned, and an exhaust air path communicating with the ventilation path is provided between the shielding piece and the suction port. Item 6. A floor suction device for a vacuum cleaner according to Item 4.