JPH0951865A - Suction port for vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve cleanup ability by forming an air blowoff port in front of an opening on the lower surface of suction port main body and providing a blower which forms an air flow for blowoff and an air blowoff passage to introduce the air flow from the blower to the air blowoff port. SOLUTION: Cleaning is performed by connecting a suction pipe 47 on the suction port side to a hose communicating with a cleaner main body, driving a motor 58 for brush driving and a driving motor 80 for blowoff and running the suction port main body on a surface to be cleaned. At this time, a rotary brush 41 is rotated by the rotation of the motor 58 for brush driving via a driving pulley 76, etc., and dust is scraped out from a floor and a carpet to be cleaned up, etc., with the brush hair 68 of the rotary brush 41, and the dust is sucked from the opening with the air. The air flow is generted by rotating a fan 81 by the rotation of the driving motor 80 for blowoff, and the air blows off from the air blowoff port 51. In this way, the dust is sucked from the opening by blowing off the dust on the surface to be cleaned.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction port body of an electric vacuum cleaner having a rotating brush.

[0002]

2. Description of the Related Art Generally, a suction port body of an electric vacuum cleaner having a rotating brush has a suction port body 1 as shown in FIGS.
By rotating the rotating brush 3 protruding from the dust suction opening 2 on the lower surface, the dust is scraped from the cleaning surface such as the floor or the carpet and is sucked from the opening 2. The rotary brush 3 is rotationally driven by the brush driving motor 4 via the pulleys 5 and 6 and the belt 7. The brush drive motor 4 is cooled by the outside air that has entered the suction port body 1.

In the figure, reference numerals 8 and 9 denote an upper case and a lower case constituting the suction port body 1, and 10 denotes a bumper for obstacles which is arranged between the upper case 8 and the lower case 9.
Reference numerals 1 and 12 denote front and rear wheels rotatably attached to the lower case 9, 13 denotes a seal material, 14 denotes a vertically rotatable drive pipe fitted to the rear portion of the suction port body 1, and 15 denotes a drive pipe 14 It is a suction pipe connected to the tip of the.

However, in such a suction port body, for example, when cleaning a carpet with long hair,
The agitator 3a and the brush bristles 3b of the rotating brush 3 do not reach the roots of the ridges of the carpet, so that dust cannot be sufficiently scraped out, and the agitator 3a of the rotating brush 3 and There was a problem that the brush bristles 3b could not reach the wall or the corners, and dust could not be sufficiently scraped out.

Therefore, the backflow of the fan is returned to the dust suction opening, and the backflow is narrowed down and blown out onto the cleaning surface to remove dust at the roots of the rug's fluff, dust at the walls and corners. An electric vacuum cleaner that uses wake energy that is blown away and sucked has been proposed.

Particularly, in Japanese Patent Laid-Open No. 3-162814, as shown in FIG. 11, the blower 2 is installed in the suction port body 20.
1, the wake of the blower 21 is adjusted by the branch adjusting vanes 22 and guided to the outlet 24 in the opening 23.
From a cleaning surface to a cleaning surface.

Further, Japanese Patent Publication No. 7-24643 discloses that
As shown in FIG. 12, a wake flow outlet 32 is provided in the area of the opening 31 of the suction port body 30, and the suction pipe 33 is provided through the opening 31.
It is disclosed that the air sucked through the air is recirculated and blown out from the air outlet 32 to the cleaning surface via the recirculation pipe 34.

[0008]

However, in the recirculation type electric vacuum cleaner utilizing the wake energy, the sucked air is recirculated and blown out by utilizing a part of the suction force, so that the vacuum cleaner is inevitable. The power to absorb the original dust becomes weak.

Further, a passage for guiding the sucked air to the air outlet is required, and particularly when a blower is provided on the cleaner body side, a passage from the cleaner body side to the suction body side is required. Therefore, there is a problem in that the hose and the extension pipe connecting the cleaner body side and the suction mouth body side become large, and the cleaner itself becomes heavy and the usability is poor.

Further, since the blower is commonly used for sucking dust and blowing air, a blower having a large capacity is required, and the blower is provided in the suction port body as disclosed in Japanese Patent Laid-Open No. 3-162814. In this case, there is a problem in that the suction port itself is large and heavy, and can be used only in a commercial robot or the like.

In view of the above, an object of the present invention is to provide a suction port body for an electric vacuum cleaner, which is improved in cleanability by blowing air to a cleaning surface and which is small and lightweight and has improved operability.

[0012]

According to the means for solving the problems according to the present invention, an air outlet is formed in the lower surface of the suction inlet main body in front of the opening, and an air outlet for blowing separate from the dust suction is provided in the suction inlet main body. A blower that forms a flow, and an air blowing passage that guides the air flow from the blower to the air outlet, are provided.
Dust on the walls and corners that the rotating brush cannot reach is blown off and sucked by the air blown from the air outlet.

Further, a blowing means for blowing air from the air outlet is provided if necessary. Here, the blowing means, a shutter for opening and closing the air outlet,
A detector that is formed of a shutter actuating member that projects from the suction port main body and opens the shutter when it comes into contact with a wall surface or the like, or a detection unit that detects that the suction port main body has reached the wall or a corner. When the suction port body reaches the wall or the corner, the blower is energized to operate, and when necessary, that is, when cleaning the wall or the corner, air is blown out from the air outlet. , Dust near walls and corners will be blown away.

Further, the blower drive motor which is the drive source of the blower and the brush drive motor which is the drive source of the rotating brush are shared. That is, a fan is attached to the brush driving motor of the rotating brush, and the brush driving motor is used as a drive source of the blower. Further, the airflow from the blower is guided to a drive source, that is, a brush drive motor, and the brush drive motor is forcibly cooled by this.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIGS. 1 and 2, a suction port body of an electric vacuum cleaner according to a first embodiment of the present invention includes a rotary brush 41 and a rotary brush 41 in a suction port body 40.
A drive device 42 for rotating and driving is installed.

The outer appearance of the suction port body 40 is composed of an upper case 43 and a lower case 44, and a bumper 45 is sandwiched between the upper case 43 and the lower case 44 at the front portion of the suction port body 40. This bumper 45 is attached to both cases 43, 4
4 has a sealing effect on the connecting surface and a buffering effect against obstacles such as walls and chests. In addition, the suction port body 40
A vertically rotatable drive pipe 46 is fitted to the rear portion, and a suction pipe 47 is connected to the tip of the drive pipe 46 so as to be rotatable in the circumferential direction. The shaft 46 a of the drive pipe 46 is supported by the upper case 43 and the lower case 44.

The lower case 44 is used as a sled for a rug, and has a horizontally elongated opening 50 for dust collection formed in the front portion of the lower surface thereof, and the front end portion of the lower surface of the lower case 44 in front of the opening 50. An air outlet 51 is formed in the air outlet 51, and a rubber sealing material 52 is laterally arranged behind the opening 50. The air outlet 51 is formed by arranging a plurality of circular small holes 51 a in the lateral direction along the opening 50.
The air outlet 51 may be formed of a plurality of long holes, square small holes, or the like.

A front wheel 53 and a rear wheel 54 are rotatably arranged on the lower case 44.
Thus, a constant gap is formed between the lower surface of the lower case 44 and the cleaning surface.

Inside the suction port body 40, an upper case 43 is provided.
And the lower case 44 are coupled to each other, the brush chamber 55 accommodating the rotating brush 41 and having the opening 50, the mechanism chambers 56 and 57 arranged on the side of the brush chamber 55, and the brush chamber 55 arranged behind the brush chamber 55 for rotation. A motor chamber 59 in which a brush drive motor 58, which is a drive source of the brush 41, is housed;
And a blower chamber 61 in which an air blower blower 60 that forms a blown air flow is housed, and is disposed between the motor chamber 59 and the blower chamber 61 and communicated from the brush chamber 55 to the drive pipe 46 side. The connecting wall 62 and the air outlet passage 63 that branches from the blower chamber 61 and communicates with the air outlet 51 through the outside of each chamber are defined by the partition wall S. The brush chamber 55 and the communication passage 62 form a dust suction passage extending from the opening 50 to the suction pipe 47.

The rotary brush 41 has a rotary shaft 65 at both ends.
It is composed of a base portion 66 having the above, and an agitator 67 and brush bristles 68, which are provided on the outer peripheral surface of the base portion 66 in a single or plural spiral shape, and are arranged so as to face downward from the opening 50. The rotary shaft 65 of the base 66 is rotatably supported by a pair of bearing assemblies 69 arranged in the mechanism chambers 56 and 57.

The bearing assembly 69 comprises a bearing 70, a bearing holder 71 for holding the bearing 70, and an elastic body 72 such as rubber interposed between the bearing 70 and the bearing holder 71, as shown in FIG. As described above, it is fitted in the inclined groove 73 formed in the mechanism chambers 56 and 57, and can move up and down along the inclined groove 73. The inclined groove 73 is formed in the lower case 4
4 is formed by a pair of inclined ribs 44a formed integrally. Further, a spring 74 is interposed between the bearing assembly 69 and the upper case 43. This allows
The rotary brush 41 supported by the bearing assembly 69 is also vertically movable, and is positioned at the lowest position due to its own weight and the biasing force of the spring 74. In addition, the brush chamber 55 and the mechanism chamber 56,
An opening S1 is formed in the partition wall S that divides the rotary shaft 57 into a space through which the rotary shaft 65 of the rotary brush 41 is inserted and which allows the rotary shaft 65 to move up and down.

The drive unit 42 is a brush drive motor 5 which is a DC magnet motor arranged in a motor chamber 59.
8 and a drive transmission mechanism 75 arranged in the mechanism chamber 56. The drive transmission mechanism 75 penetrates the partition wall S between the motor chamber 59 and the mechanism chamber 56 and is fitted to and fixed to a motor shaft 58 a disposed in the mechanism chamber 56, and one of the rotary brush 41. The gear pulley 77 is externally fitted and fixed to the rotating shaft 65, and the timing belt 78 is wound around the drive pulley 76 and the gear pulley 77. The free end side of the drive pulley 76 is rotatably supported by a bearing assembly 79 arranged in the mechanism chamber 56.

The air blower blower 60 includes a blower chamber 6
Blower drive motor 80, which is a small DC magnet motor arranged in No. 1, and motor shaft 8 of blower drive motor 80
0a attached to the fan 81. And
A ventilation port 82 for taking in outside air into the blower chamber 61 is formed in the rear portion of the lower case 44 in correspondence with the fan 81.

Although not shown, inside the cleaner body,
A dust blower for sucking dust together with air from the opening 50 is provided. Further, a wiring structure (not shown) from the cleaner body side is connected to the brush drive motor 58 and the blower drive motor 80, and this wiring structure is connected to a hose and an extension pipe communicating with the cleaner body and these. It is guided into the suction port body 40 through the suction pipe 47 and the drive pipe 46. Then, the brush drive motor 58 and the blower drive motor 80 are turned on / off by a hand switch arranged on a hose or the like.

In the above structure, the suction pipe 47 on the suction body side is connected to a hose or extension pipe communicating with the cleaner body, and the brush driving motor 58 and the blowing driving motor 8 are connected.
Cleaning is performed by driving 0 to cause the suction port body 40 to run on the cleaning surface.

At this time, the rotation of the brush driving motor 58 causes the rotation brush 41 to rotate via the drive pulley 76, the timing belt 78, and the gear pulley 77, and the agitator 67 and the brush bristles 68 of the rotation brush 41 clean the floor or carpet. Dust is scraped from the cleaning surface such as the above, and this dust is sucked through the opening 50 together with air.

On the other hand, the fan 81 is rotated by the rotation of the blower drive motor 80, and the outside air is sucked from the ventilation port 82 to generate an air flow, and this air flow is sent to the air outlet 51 through the air outlet passage 63. It is guided and blows out from the air outlet 51 toward the cleaning surface. Thus, when the cleaning surface is a carpet, the dust at the root of the carpet can be blown off, and the blown out dust is sucked from the opening 50. Further, when the suction port body 40 reaches the wall or the corner, since the air outlet 51 is formed at the lower end of the lower case 44 in front of the opening 50, dust on the wall or in the corner should be blown off. Then, the blown dust is sucked from the opening 50. The dust sucked through the opening 50 is collected in the cleaner body through the dust suction passage, the suction pipe 47, the hose and the extension pipe.

As described above, since the air outlet 51 is formed in front of the opening of the suction port body 40, the dust on the wall or in the corner where the agitator 67 and the brush bristles 68 of the rotating brush 41 cannot reach is blown. It can be blown away and sucked by the air blown out from the outlet 51, and the cleanability is improved.

Further, since the air blower 60 is provided in the suction port main body 40 separately from the dust suction fan, the original dust of the vacuum cleaner, such as the conventional recirculation type utilizing backflow energy, is used. The ability to inhale is not weakened.
Further, the conventional reflux type does not require a passage for guiding air from the cleaner body side to the suction body body side, which is required when a blower is provided on the cleaner body side, and the cleaner itself is heavy. It is possible to solve problems such as poor usability,
Moreover, it is possible to eliminate the problem that the suction port itself is large and heavy, such as when a large-capacity blower that is commonly used for dust suction and air blowing is provided on the suction port body side, and it is possible to blow air small In addition, it is possible to provide a lightweight and easy-to-use suction port body.

Next, a second embodiment will be described. As shown in FIGS. 4 and 5, the suction port body according to the second embodiment includes a shutter 90 that opens and closes the air outlet 51 on the suction port body 40 and a wall surface that projects from the suction port body 40. And a shutter operation body 91 that opens the shutter 90 when the shutter 90 is opened.
Further, the shutter operating body 91 constitutes a blowing means for blowing air from the air outlet 51 as needed. That is, in the first embodiment, air is constantly blown out from the air outlet 51 at the time of cleaning, and dust may be scattered when cleaning the cleaning surface such as between the plates, which is solved. In order to do so, the air is blown out from the air outlet 51 only when necessary, that is, only when the suction port body 40 reaches a wall or a corner.

The shutter 90 has an air blowing passage 63.
A slide piece 92 that is movably arranged in the front-rear direction and slides in the front-rear direction along the lower surface of the lower case 44, and an upright piece 93 that stands upright from the front end of the slide piece 92. It is composed of a substantially L-shaped plate material formed in. Then, the sliding piece 92
Includes an air outlet 51 formed on the lower surface of the lower case 44.
Is formed with a plurality of small holes 92a, and the shutter 90 has an air blocking posture in which the air outlet 51 and the small hole 92a are displaced from each other, and an air outlet posture in which the air outlet 51 and the small hole 92a are aligned. Can be switched to.

The shutter operating body 91 comprises a standing piece 93.
The operation pin 94 that penetrates the center of the vertical direction in the front-rear direction and is fixed to the standing piece 93, and the partition wall S that partitions the air outlet passage 63 and the brush chamber 55 and the standing piece 93 are operated. The operation spring 95 has a pin 94 inserted therethrough. Then, the operating pin 94 has the insertion hole 9 formed in the lower case 44.
6 is arranged so as to project forward from the position 6, and the operating spring 95 urges the shutter 90 in the direction of the air blocking posture.

In the above structure, when the suction port body 40 is moved on the cleaning surface for normal cleaning, the shutter 90 is in the air blocking posture by the urging force of the actuating spring 95, and the air outlet port 51. No air is blown out of it, and dust is not scattered. On the other hand, when the suction port body 40 reaches a wall or a corner and the actuating pin 94 comes into contact with the wall, chest, or the like and is pushed backward, that is, in the direction of the suction port body 40, the shutter 90 biases the actuating spring 95. The air outlet position is switched to the air outlet 51
Air is blown out of the openings to blow dust near the walls and corners and suck it through the openings 50. The other configurations and operations are the same as those in the first embodiment, and the members having the same functions as those in the first embodiment are designated by the same reference numerals.

By thus providing the shutter 90 and the shutter operating body 91, the suction port main body 40
The air can be blown out from the air outlet 51 only when the air reaches the wall or the corner, dust can be prevented from scattering due to unnecessary air blowing, and the cleanability can be improved.

Next, a third embodiment will be described. As shown in FIG. 6, the suction port body according to the third embodiment is provided with an operation switch 97 for controlling energization of the air blower blower 60 in the air blowing passage 63 of the suction port body 40. The reference numeral 97 allows the air blower 60 to be energized when it comes into contact with a wall surface or the like.
That is, in the first and second embodiments, the air blower blower 60 is constantly operating during cleaning, which may increase power consumption and extra electricity bills.
In order to eliminate this, the air blower 60 is configured to operate as needed, that is, only when the suction port body 40 reaches the wall or a corner.

The operation switch 97 is a push-on type micro switch, and has an actuator 97a which projects forward from an insertion hole 96 formed in the lower case 44. When the suction port body 40 is traveling on the cleaning surface for normal cleaning, the operation switch 97 is in the off state, the air blower blower 60 does not operate, and the air outlet 51 blows air. Does not blow out and dust does not scatter.

On the other hand, when the suction port body 40 reaches a wall or a corner and the actuator 97a of the operation switch 97 comes into contact with the wall, chest or the like and is pushed rearward, that is, in the direction of the suction port body 40, the operation switch 97 Is turned on, the air blower 60 is activated, and air is blown out from the air outlet 51 to blow off dust on the side of a wall or in a corner and suck it from the opening 50. That is, the actuator 97a
Functions as a detection unit that detects that the suction port body 40 has reached a wall or a corner, and a blowout unit that blows air from the air blowout port 51 as needed by the operation switch 97 including the actuator 97a. It is configured. An optical sensor or an ultrasonic sensor is adopted as the detection unit, and a control unit for controlling the operation of the air blower blower 60 according to the output of the sensor is provided, and the blowing unit may be configured by the sensor and the control unit. Good. Other configurations and operations are similar to those of the first embodiment, and members having the same functions as those of the first embodiment are designated by the same reference numerals.

As described above, by providing the operation switch 97, the air blower blower 60 operates only when the suction port main body 40 reaches the wall or the corner, and the air blowout port 51.
Air can be blown out from the air, wasteful power consumption due to unnecessary operation of the air blower 60 and unnecessary dust scattering due to air blowing can be eliminated, and it is possible to improve economy and cleanability.

Next, a fourth embodiment will be described. As shown in FIG. 7, the suction port body according to the fourth embodiment is shared by a blower drive motor that is a drive source of an air blower and a brush drive motor 58 that is a drive source of a rotary brush 41. Has been done. That is, in the first to third embodiments, since the blower drive motor 80 and the brush drive motor 58 are separately arranged in the suction port body 40, a space for disposing them is required. It is difficult to downsize the suction port body, and the weight of the suction port body is heavy and the cost is high. Therefore, in order to eliminate this, the brush drive motor 5 is used as a blower drive motor.
I am using 8.

In this structure, the fan 98 is externally fitted and fixed on the side of the motor shaft 58a of the driving motor 58 opposite to the side where the drive pulley 76 is externally fitted and fixed, and functions as an air blower and a suction port. In the main body 40, an air outlet passage 99 that branches from the motor chamber 59 and communicates with the air outlet 51 through the outside of each chamber is defined by a partition wall S. In addition, in the upper case 43, the motor chamber 59
A vent hole (not shown) for taking in outside air is formed in the.

When the drive motor 58 is driven,
The rotating brush 41 rotates and the fan 98 rotates, so that the air flow passes through the air blowing passage 99 and the air outlet 51.
And is blown out from the air outlet 51. The other configurations and operations are the same as those in the first embodiment, and the members having the same functions as those in the first embodiment are designated by the same reference numerals.

As described above, by sharing the drive source of the blower for blowing air and the drive source of the rotary brush 41, space saving can be realized and the suction port body can be downsized, and the suction port body can be downsized. The weight is reduced, the operability is improved, and the cost can be reduced by reducing the number of parts.

Next, a fifth embodiment will be described. As shown in FIG. 8, the suction port body according to the fifth embodiment guides the air flow from the air blower for blowing air according to the fourth embodiment to the drive motor 58 as a drive source to cool the air. I have to. That is, in the fourth embodiment, the load for rotating the rotary brush 41 and the fan 98 is applied to the drive motor 58 at the same time, and the drive motor 58 may overheat and become overloaded. In order to eliminate this, the fan 98 used to generate the blowing air flow is driven by the driving motor 58.
It is also used for cooling.

In this structure, the fan 98 is externally fitted and fixed to the side of the motor shaft 58a of the driving motor 58 where the driving pulley 76 is externally fitted and fixed, and when the driving motor 58 drives the fan 98 to rotate. The airflow generated at this time passes through the inside and the outside of the drive motor 58 to forcibly cool the drive motor 58. The other configurations and operations are the same as those in the fourth embodiment, and the members having the same functions as those in the fourth embodiment are designated by the same reference numerals.

As described above, since the drive motor 58 can be forcibly cooled by the fan 98, the rotary brush 4
1 and the fan 98 are rotated, it is possible to prevent the drive motor 58 from being overheated at the same time, and it is possible to use the drive motor 58 having a small capacity, so that the drive motor 58 can be downsized. .

The present invention is not limited to the above embodiment, and it goes without saying that many modifications and changes can be made to the above embodiment within the scope of the present invention. For example, the air blower in the first or second embodiment may be a turbine that rotates by using the dust suction air flow. Further, the shutter in the second embodiment may be applied to the third to fifth embodiments.

[0047]

As is apparent from the above description, claim 1
According to the invention, since the air outlet is formed in the lower surface of the suction port body in front of the opening, dust on the wall or at the corner which the rotating brush does not reach is blown off and sucked by the air blown out from the air outlet. Therefore, the cleanability is improved.

Further, since the blower is provided in the suction port main body separately from the one for sucking dust, the power of sucking the dust inherent in the vacuum cleaner is weak as in the conventional reflux type utilizing the backflow energy. It never happens. Further, the conventional reflux type does not require a passage for guiding air from the cleaner body side to the suction body body side, which is required when a blower is provided on the cleaner body side, and the cleaner itself is heavy. It is possible to solve the problem that it is not easy to use, and the suction port itself is large and heavy, as in the case of installing a large capacity blower shared for dust suction and air blowing on the suction port body side. Therefore, it is possible to provide a suction port body that is small in size, light in weight, and has good operability, in which air can be blown out.

According to the second and third aspects of the present invention, the air can be blown out from the air blow-out port only when the suction port main body reaches the wall or the corner, if necessary. It is possible to improve the cleanability by eliminating the scattering of dust.

According to the fourth aspect of the present invention, it is possible to eliminate wasteful power consumption due to unnecessary operation of the blower and dust scattering due to blowing of air, which is economical and improves cleanability.

According to the invention of claim 5, since the drive source of the blower and the drive source of the rotary brush are shared, space saving can be realized, the suction port body can be downsized, and the suction port can be reduced. The weight of the body is reduced, the operability is improved, and the number of parts is reduced to reduce the cost.

According to the invention of claim 6, the air flow from the blower can be guided to the drive source to cool the drive source, so that the drive source of the rotary brush can be prevented from overheating.

[Brief description of drawings]

FIG. 1 is an internal configuration diagram of a suction port body according to a first embodiment of the present invention.

FIG. 2 is a side sectional view of the same.

FIG. 3 is a side sectional view showing a supported state of the bearing assembly.

FIG. 4 is a side sectional view of a suction port body according to a second embodiment.

FIG. 5 is a perspective view of a shutter.

FIG. 6 is a side sectional view of a suction port body according to a third embodiment.

FIG. 7 is an internal configuration diagram of a suction port body according to a fourth embodiment.

FIG. 8 is an internal configuration diagram of a suction port body according to a fifth embodiment.

FIG. 9 is an internal configuration diagram of a conventional suction port body.

FIG. 10 is a side sectional view of the same.

FIG. 11 is a side sectional view of another conventional suction port body.

FIG. 12 (a) is a side sectional view of another conventional suction port body,
(B) A perspective view of the same

[Explanation of symbols]

 40 Suction Port Main Body 41 Rotating Brush 50 Opening 51 Air Outlet 60 Blower 63 Air Outlet Passage 90 Shutter 91 Shutter Actuator

Claims (6)

[Claims] 1. A suction port body of an electric vacuum cleaner in which an opening for dust absorption is formed on a lower surface of a suction port body, and a rotating brush is provided corresponding to the opening, and a suction brush is provided on a lower surface of the suction port body from the opening. Also has an air outlet in the front, and an air blower that forms an air flow for blowing that is separate from the dust suction in the suction port body, and an air blowing passage that guides the air flow from the blower to the air outlet. The suction port body of the electric vacuum cleaner, which is provided with. 2. The suction port body of the electric vacuum cleaner according to claim 1, further comprising a blowing unit for blowing air from the air blowing port as needed. 3. The blowing means comprises a shutter for opening and closing the air outlet, and a shutter actuating body which opens the shutter when it projects from the suction inlet main body and comes into contact with a wall surface or the like. Suction mouthpiece of the vacuum cleaner described. 4. The blow-out means includes a detector for detecting that the suction port body has reached a wall or a corner, and energizing a blower to operate when the suction port body has reached a wall or a corner. The suction port body of the electric vacuum cleaner according to claim 2. 5. The suction port body for an electric vacuum cleaner according to claim 1, wherein the drive source of the blower and the drive source of the rotary brush are shared. 6. The suction port body of the electric vacuum cleaner according to claim 1, wherein an air flow from the blower is guided to a drive source of the rotary brush.