JPH09154781A - Suction port body for electric vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To vary the driving state of a rotary blade and suction force from a suction port corresponding to the conditions of a floor suction by simple constitution and to efficiently perform cleaning. SOLUTION: A turbine chamber 33 communicating with an outer part at an intake port for freely rotatably and pivotally supporting an air turbine 48 is sectioned and formed inside a case body. The intake air path downstream side of the turbine chamber 33 is made to communicate with an air path communicating with a suction chamber 20 for opening the suction port 24 and shutter 71 for adjusting the opening degree of an intake air path is freely slidably arranged in the case body. The shutter 71 is operated and the intake ratio of an intake amount from the intake port flowing through the intake air path and the intake amount from suction port 24 flowing through and circulated in a suction air path is relatively varied. The rotation of the rotary blade 61 and the suction force are relatively varied matched with the conditions of the floor surface by the simple constitution. At the time of rotating the rotary blade 61 and cleaning a carpet, this suction port main body 11 is not closely adhered to the carpet. Cleaning efficiency and operability are improved.

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 provided with an air turbine for rotationally driving a rotary cleaning body.

[0002]

2. Description of the Related Art Conventionally, as a suction port body of an electric vacuum cleaner provided with this type of air turbine, for example, US Pat.
The configuration described in Japanese Patent No. 816 is known.

The suction port body of the electric vacuum cleaner disclosed in US Pat. No. 2,904,816 is connected to a suction chamber having a rotary cleaning body rotatably accommodated therein and having a suction port opened at the lower surface thereof, and a hose or an extension pipe. The intake air passage between the communication pipe and the intake air passage that rotatably accommodates the air turbine that rotates the rotary cleaning body by the intake air flow between the intake port opening on the upper surface and the communication pipe A valve body is provided at the confluence of the air passage and the intake air passage, and the intake air passage is opened / closed by switching the valve body to adjust the suction amount and the intake air amount.

[0004]

However, in the suction port body of the conventional vacuum cleaner described in the above-mentioned US Pat. No. 2,904,816, when the suction air passage is closed and adjusted by the switching operation of the valve body, the intake air is sucked. The amount of intake air from the mouth becomes maximum and the air turbine rotates at high speed.However, when the intake air passage is adjusted to open, the amount of intake air from the intake opening decreases, but the degree of opening of the intake air passage does not change, so the air intake There is a risk that the turbine cannot be stopped or rotated at a low speed, and the rotary cleaning body rotates even between the plates that do not need to rotate, and the spaces between the plates may be damaged.

Further, since the dust is easily sucked by the rotational drive of the rotary cleaning member, the suction force is not reduced to reduce the adhesion to the floor surface and improve the operability.

In view of the above problems, the present invention has a suction port of an electric vacuum cleaner which has a simple structure and can change the driving state and suction force of a rotary cleaning member in accordance with the condition of a surface to be cleaned to perform efficient cleaning. Provide the body.

[0007]

A suction port body for an electric vacuum cleaner according to claim 1, wherein a suction port is opened on a lower surface facing the surface to be cleaned, and the suction port is opened separately from the suction port. A body, a communication pipe provided in the case body, which communicates with the suction port and communicates with the intake port through an intake air passage, a rotary cleaning body rotatably disposed in the case body, and the intake air An air turbine equipped with an air turbine that is rotatably arranged in the air passage by an intake air flow to drive the rotary cleaning body to rotate, and an air intake adjusting means that is provided in the case body and opens and closes the air intake passage. By adjusting the intake air passage to be closed by the means, the intake amount from the intake port is reduced and the intake amount from the intake port is relatively increased.
By reducing the amount of intake air from the intake port, the rotation speed of the air turbine that rotates with the intake airflow is reduced, the rotation of the rotary cleaning body is reduced, and the suction force due to the increase in the amount of intake air from the intake port is relatively increased. The air intake is adjusted by adjusting the air intake adjustment means that opens the intake air passage to reduce the amount of intake air from the intake port, thereby reducing the suction force and rotating the intake air flow due to the increase in the intake air amount from the intake port. With a simple configuration such as increasing the number of rotations of the air turbine to increase the rotation of the rotary cleaning member for cleaning, for example, in the case of a rotary cleaning member for scraping dust such as carpet, the intake air adjustment means Adjust the intake air volume from the intake port to be large, rotate the air turbine at high speed by the strong intake airflow from the intake port, and rotate the rotary cleaning unit at high speed to scrape dust from the carpet and suck it in. The suction force is reduced and the suction port is prevented from sticking to the carpet, which reduces the running performance and improves the cleaning workability.In the case of a rotary cleaning unit for polishing between boards, when cleaning between the boards, Adjusts the amount of intake air from the intake port by the intake adjustment means, rotates the air turbine at high speed by the strong intake airflow from the intake port, rotates the rotary cleaning body at high speed, and polishes the space between the plates. In this case, adjust so that it is not sucked from the intake port, and suction the dust inside the carpet with a strong suction force from the suction port to clean it. The cleaning mode can be easily changed according to the type of the cleaning body and the condition of the surface to be cleaned, and the cleaning efficiency is improved.

The suction port body of the electric vacuum cleaner according to claim 2 is
The suction inlet of the electric vacuum cleaner according to claim 1, wherein the intake adjusting means includes a shutter that is slidably provided to open and close the intake air passage. By opening and closing the intake air passage and adjusting the amount of intake air from the intake port, the strength of the suction force from the intake port and the rotation speed of the rotary cleaning body due to the rotation of the air turbine are easily adjusted with a simple structure. It is easy to clean the surface to be cleaned and the cleaning efficiency is improved.

The suction port body of the electric vacuum cleaner according to claim 3 is
The suction port body of the electric vacuum cleaner according to claim 1 or 2, wherein the rotary cleaning body includes a scraping unit that scrapes off dust from the surface to be cleaned. If you do not need to rotate your body or rotate your body at a low speed, adjust the amount of intake air from the intake port to be less than the amount of intake air from the intake port by using the intake adjustment means, and do not inhale from the intake port or the intake port. The rotation of the air turbine is stopped or rotated at a low speed due to the reduction of the intake air amount from, and the rotary cleaning body is stopped or rotated at a low speed, and the suction force from the suction port is increased to efficiently suck the dust. On the other hand, for example, when it is necessary to scrape dust by the scraping means of the rotary cleaning body due to the rotation of the rotary cleaning body such as a carpet on the surface to be cleaned, the intake air amount from the intake port is increased by the intake adjusting means. The air turbine is rotated at high speed by the strong intake airflow from the intake port to rotate the rotary cleaning unit at high speed to scrape out dust from the carpet and reduce the suction force from the intake port to the carpet. The suction port is prevented from adhering and the traveling property is prevented from deteriorating, and the cleaning workability is improved.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION A structure showing an embodiment of a suction port body of an electric vacuum cleaner of the present invention will be described below with reference to the drawings.

In FIG. 1 to FIG. 3, reference numeral 11 denotes a suction port main body which is laterally long with respect to the traveling direction, and the suction port main body 11 includes a lower main body case 12 made of synthetic resin such as acrylonitrile-butadiene-styrene resin. Lower body case 12
The upper body case 13 of the same material that is coupled and fixed to the upper part of the rectangular body case is joined by sandwiching the bumper 14 along the peripheral surface including the front surfaces of the lower body case 12 and the upper body case 13. 15 are formed.

A rib portion 19 is formed on the upper surface of the lower body case 12 substantially vertically, and a horizontally long suction chamber 20 is formed in the front side, which is the traveling direction side, in the substantially left-right direction. Further, the lower main body case 12 has an air passage chamber 21 that communicates with the suction chamber 20 at a substantially rear center, a drive transmission chamber 22 that is partitioned and formed at one end side from substantially the center, and a drive transmission chamber 22 at one end side. A drive chamber (23) which communicates with each other and is divided into one end side of the suction chamber (20) is formed. Further, a suction port 24 of the suction chamber 20 is formed on the lower surface of the suction port main body 11 facing the floor surface (not shown) which is the surface to be cleaned. The suction chamber 20 and the air passage chamber 21 form a suction air passage through which the air sucked from the suction port 24 flows.

On the other hand, a substantially semi-circular dome portion 31 is formed in a substantially central portion of the upper body case 13 so as to project upward.
A substantially funnel-shaped middle case 32 having a large diameter in the upper portion and a small diameter in the lower portion is attached to the dome portion 31, and a turbine chamber 33 is defined therein. An intake port 34 communicating with the turbine chamber 33 is formed on the rear side of the upper main body case 13, and a filter 35 is provided in the intake port 34 in a closed state. Further, in the turbine chamber 33, a spiral rib 37 that forms an intake air passage that is spirally sucked from the intake port 34 is provided.

Further, the middle case located on the downstream side of the intake air passage
In the lower end portion of 32, a communication hole (not shown) is cut out so that the turbine chamber 33 communicates with the air passage chamber 21. A bearing portion is provided outside the upper end edge of the communication hole to pivotally support a rotating shaft (not shown) of the communication pipe 40 attached to the rear center of the suction port body 11 with the lower body case 12.

Further, a bearing mounting rib 45 for mounting the first bearing 44 is provided substantially at the center of the dome portion 31 of the upper main body case 13, and the first bearing 44 is provided at the lower end portion of the middle case 32. Bearing mounting ribs 47 for mounting the second bearings 46 are provided coaxially with. Then, these first and second bearings 44 and 46
Rotatably supports the shaft body 49 of the air turbine 48,
An air turbine 48 is rotatably supported in the turbine chamber 33. A turbine pulley 50 is integrally provided coaxially at the lower end of the shaft body 49 of the air turbine 48.

The lower end of the middle case 32 is brought into contact with the rib portion 19 which defines the drive transmission chamber 22 of the lower body case 12, and the upper surface of the drive transmission chamber 22 is provided at the lower end of the middle case 32 and is not shown. The case body 15 is closed by the body, and the upper body case 13 and the lower body case 12 are joined to form a case body 15.

Further, a communication pipe 40 is attached to the center of the rear portion of the suction port body 11 such that a rotation shaft is pivotally supported by the middle case 32 and the lower body case 12 and is rotatable at a predetermined vertical angle. . Further, the front end portion of the communication pipe 40 has an air passage chamber 21.
It is rotatably fitted inside and communicates with the suction chamber 20 and the turbine chamber 33 through the air passage chamber 21. On the other hand, the rear end of the communication pipe 40 projects rearward outward from the suction port body 11, and the bent front end of the connecting pipe 51 is rotatably fitted to the rear end. The connecting pipe 51 is detachably connected to the hose via an extension pipe (not shown) and further connected to an electric vacuum cleaner body (not shown). And the suction chamber 20 is the air duct chamber 2
1, the communication pipe 40, the connection pipe 51, the extension pipe (not shown), and the hose to communicate with the dust collecting chamber of the main body of the electric vacuum cleaner.

A driven rear wheel chamber 54 is provided on both sides of the communication pipe 40 of the lower main body case 12, in which driven rear wheels (not shown) are rotatably supported, and driven front wheels (not shown) rotate on both front end sides. A driven front wheel chamber 56, which is freely supported, is formed.

On the other hand, in the suction chamber 20, a rotary blade 61 as a rotary cleaning member is rotatably provided. The rotary blade 61 is provided with a plurality of blade portions 62, which are scraping means having flexibility in a spiral shape on the outer peripheral surface. Further, a pulley 63 is integrally provided at one end of the rotary blade 61. In the rotary blade 61, the pulley 63 is located in the drive chamber 23, and shaft portions 64, 64 rotatably provided at both ends in the axial direction are engaged with bearings 65, 65 provided in the case body 15, respectively. They are combined and rotatably supported.

The rotating blade 61 has a lower end portion so that the rotating blade 61 does not come into contact with a flat surface to be cleaned such as a space between plates but contacts an elastically deformable surface to be cleaned such as a carpet or a tatami mat. It is provided so as to slightly project downward from the suction port 24.

The turbine pulley of the air turbine 48
An endless belt (not shown) is wound around the pulleys 50 and the pulleys 63 of the rotary blades 61 via various pulleys arranged in the drive chamber 23, and the rotary blades 61 of the suction port main body 11 are rotated by the rotation of the air turbine 48. It is designed to rotate in the opposite direction to the traveling direction.

A laterally elongated operation opening 67 is formed in one side of the dome portion 31 of the upper body case 13, and a position facing the operation opening is formed on the upper surface of the lower body case 12. The rail part that protrudes like a wall in the left-right direction
68 are provided. Furthermore, a scale 69 is provided in the longitudinal direction on one longitudinal edge of the operation opening 67.

Further, the rail portion 68 is provided with a shutter 71 facing the operation opening 67, which is slidable in the left-right direction as an intake adjusting means. As shown in FIG. 4, the shutter 71 has a main body 72 having a substantially rectangular parallelepiped shape.
A plate-shaped closing portion 73 is integrally provided at one end of the. Further, a knob portion 74 projecting upward in a claw shape is integrally formed at an intermediate portion of the upper surface of the main body portion 72, and a groove-like notch is formed along the longitudinal direction on the lower surface. A guide groove portion 75 that slidably engages with the rail portion 68 is formed.

In this shutter 71, the knob portion 74 projects from the operation opening 67, the operation opening 67 is closed by the main body portion 72, and the knob portion 74 is slid along the rail portion 68. , The closing portion 73 is located between an unillustrated intake duct and a turbine chamber 33 that form a part of the intake air passage that connects the intake port 34 and the turbine chamber 33, and opens and closes the intake air passage,
The amount of intake air to the turbine chamber 33 is adjusted.
By adjusting the amount of intake air to the turbine chamber 33, the amount of intake air flowing through the intake air passage is changed, and the amount of intake air in the intake air passage that joins in the air passage chamber 21 is also changed. Have a relationship.

On the other hand, the lower part of the front surface of the suction port body 11 is projected toward the surface to be cleaned to improve the airtightness of the suction chamber 20, and
A seal lip (not shown) protruding downward in a wall shape is formed so as to improve the dust collecting property near the wall.

Next, the operation of the above embodiment will be described.

At the time of cleaning, the suction port body 11 is connected to an electric vacuum cleaner body (not shown) via an extension pipe and a hose. Next, depending on the state of the surface to be cleaned, hold the knob 74 of the shutter 71 and slide it appropriately to adjust the opening of the intake air passage and push while pushing the end of the hose on the extension tube side. do it,
The suction port body (11) is moved forward and backward while being in contact with the floor surface which is the surface to be cleaned.

When the surface to be cleaned is between the plates, rotating the rotary blade 61 may damage the space between the plates by the blade portion 62, so the rotary blade 61 is not rotated. That is, the knob portion of the shutter 71
Hold the 74 along the rail 68 and the knob 74 will open.
The shutter 71 is slid to the dome portion 31 side of the suction port body 11 until it is located at one end of 67. And this shutter
Due to the movement of 71, the intake air passage is closed by the closing portion 73 of the shutter 71, and due to the suction force of the electric vacuum cleaner body, it is not sucked from the suction port 34 and is all sucked from the suction port 24.
The dust on the surface to be cleaned is sucked together with air from 24, and the dust is collected in the dust collecting chamber in the main body of the electric vacuum cleaner through the suction chamber 20, the air passage chamber 21, the communication pipe 40, the connecting pipe 51, the extension pipe, and the hose. To capture.

All of the suction force of the main body of the electric vacuum cleaner is sucked from the suction port 24, and the suction force from the suction port 24 is maximized, so that dust on the wall can be sufficiently sucked.

Further, when the surface to be cleaned is a fold, etc., the dust on the fold cannot be sufficiently sucked and removed unless the rotary blade 61 is rotated, and when the rotary blade 61 is rotated at a high speed,
Since the noise generated when the blade portion 62 comes into contact with the fold becomes large, the rotating blade 61 is rotated at a low speed. That is, holding the knob portion 74 of the shutter 71, the shutter 71 is slidably moved along the rail portion 68 so that the knob portion 74 is located at the intermediate portion of the operation opening 67. Due to the movement of the shutter 71, the intake air passage is partially closed by the closing portion 73 of the shutter 71, and the suction force of the vacuum cleaner body sucks air weakly from the suction port 34 and the suction port 24. Is also sucked from. Then, the air taken in through the intake port 34 reaches the turbine chamber 33 through the intake air passage, and the air turbine 48 rotates at a low speed due to this weak suction airflow, and the rotating blade 61 rotates at a low speed through the endless belt. Then, dust is picked up from the fold and sucked through the suction port 24.

Although a part of the suction force of the main body of the vacuum cleaner becomes intake air from the intake port 34 due to the partial opening of the intake air passage, the suction force from the intake port 24 is reduced by that amount. Since the dust is scraped off by the rotational drive of the rotary blade 61, it becomes easy to suck in, and almost no unsucked residue occurs due to a decrease in suction force.

Further, when the surface to be cleaned is a carpet or the like,
It is necessary to rotate the rotary blade 61 at a predetermined rotation speed or higher, that is, at a high speed to scrape dust adhering to the hair of the carpet that cannot be captured only by suction. In this case, hold the knob portion 74 of the shutter 71 along the rail portion 68 until the knob portion 74 is located at the other end of the operation opening 67.
Is slid to the end side of the suction port body 11. By this movement of the shutter 71, the intake air passage is fully opened, and the suction force of the electric vacuum cleaner body causes strong suction from the suction port 34 and also suction from the suction port 24. Then, the air sucked from the intake port 34 reaches the turbine chamber 33 through the intake air passage, and the suction airflow causes the air turbine 48 to rotate at high speed, and the rotating blade 61 to rotate at high speed via the endless belt. , Scrape up thread dust and hair that are entangled in carpet hair,
Inhale through the suction port 24.

Since the intake port 34 has a smaller opening area than the intake port 24, and the air turbine 48 that serves as a wind path resistance is located in the intake air channel, the intake port 24 hardly sucks in the intake port, The suction force from 24 is only reduced. Then, since the dust is scraped off by the high-speed rotation driving of the rotary blade 61, it becomes easy to suck in, and almost no unsucked residue occurs due to a decrease in suction force.

Further, when the surface to be cleaned is a carpet or the like,
If the suction force from the suction port 24 is too strong, the lower pressure of the suction port 24 causes the lower surface of the suction port body 11 to come into close contact with the carpet, so that dust cannot be sufficiently sucked in and the carpet and the suction port body 11 are not sucked. Although the frictional resistance with the lower surface of the vacuum cleaner increases and the traveling performance deteriorates, a part of the suction force of the vacuum cleaner body is used for the rotation of the rotating blade 61 and the suction force from the suction port 24 decreases, so it is sufficient. The dust scraped off can be sucked in, the traveling performance can be prevented from being deteriorated, and the cleaning workability can be improved.

According to the above-described embodiment, the shutter 71 slidably opens and closes the intake air passage communicating with the suction air passage and the downstream side. It is possible to relatively change the intake ratio between the intake amount from the intake port 34 passing through the intake air passage and the intake amount from the intake port 24 passing through the intake air passage, and for example, the surface to be cleaned is a plate or a fold. When it is not necessary to rotate the rotary blade 61 or when rotating at low speed, the amount of intake air from the intake port 24 increases due to the operation of closing the intake air passage with the shutter 71, and the intake air is not taken from the intake port 34, or Since the amount of intake air from the intake port 34 is reduced, the rotation of the air turbine 48 can be stopped or rotated at a low speed, the rotating blades 61 can be stopped or rotated at a low speed, and the suction force from the intake port 24 can be increased to efficiently. Suction dust Kill.

On the other hand, when dust needs to be scraped off by the blade portion 62 of the rotary blade 61 by rotating the rotary blade 61 such as a carpet on the surface to be cleaned, the intake air passage is opened by the shutter 71. By the operation, the amount of intake air from the intake port 34 increases, the air turbine 48 can be rotated at high speed by the intake airflow strongly sucked from the intake port 34, the rotating blade 61 can be rotated at high speed, and dust can be sufficiently scraped out from the carpet. At the same time, the suction force from the suction port 24 is reduced, and the suction port 24 does not come into close contact with the carpet, so that the dust that has been scraped can be sucked in efficiently.
It is possible to prevent the traveling performance from being deteriorated due to the close contact and improve the cleaning workability.

Further, since the opening of the intake air passage can be continuously changed by the sliding movement of the shutter 71, the rotation speed of the rotary blade 61 can be continuously and appropriately changed according to the cleaning situation.

Further, since the shutter 71 is slidably provided so as to open and close the intake air passage, the dust does not come into contact with the dust sucked from the suction air passage, and the dust adheres to the shutter to impair the operability. There is no.

Next, another embodiment of the suction port body of the electric vacuum cleaner of the present invention will be described with reference to FIG.

The embodiment shown in FIG. 5 is the blade portion 62 of the rotary blade 61 of the embodiment shown in FIGS.
The brushing member 81 is for polishing the surface to be cleaned such as between the plates.

When the suction port body 11 of the electric vacuum cleaner is used, the surface to be cleaned is between the plates, and in this case, the surface to be cleaned in the embodiment shown in FIGS. 1 to 4 is a carpet or the like. Similarly to the case, the shutter 71 is held along the rail portion 68 with the knob portion 74, and the shutter 71 is slid to the end portion side of the suction port body 11 until the knob portion 74 is located at the other end portion of the operation opening 67. To move. This movement of the shutter 71 causes the intake air passage to be fully opened, and the suction force of the vacuum cleaner body causes the intake port 34 to move.
Suction port that is strongly inhaled from the air and joins in the air duct chamber 21
It is also sucked from 24. Then, the air sucked from the intake port 34 reaches the turbine chamber 33 through the intake air passage, and the suction airflow causes the air turbine 48 to rotate at high speed, and the rotating blade 61 to rotate at high speed via the endless belt. The brushing member 81 of the rotary blade 61 sweeps away dust between the plates and polishes the spaces between the plates.

Since the intake port 34 has a smaller opening area than the intake port 24 and the air turbine 48 that acts as a wind path resistance is located in the intake air path, the intake port 24 hardly sucks and the intake port The suction force from 24 is only reduced. Further, since the dust is swept out by the high-speed rotation drive of the rotary blade 61, the dust can be easily sucked, and therefore, the unsucked residue due to the decrease in the suction force hardly occurs.

As in the embodiment shown in FIG. 5, even when the rotary blade 61 needs to be rotated appropriately not only by the state of the surface to be cleaned but also by the type of the rotary blade 61, the shutter has a simple structure. The rotary drive state of the rotary blade 61 can be easily and appropriately changed only by operating the 71.

In the embodiment shown in FIGS. 1 to 4 and the embodiment shown in FIG. 5, the suction port main body 11 is not limited to the canister-type vacuum cleaner, and the suction port main body 11 is provided on the lower surface of the vacuum cleaner main body. Upright type directly formed, etc.
It can also be applied to a self-propelled vacuum cleaner in which the vacuum cleaner main body and the suction port main body 11 are integrated.

Although the shutter 71 is slidably provided as the intake adjusting means to change the opening degree of the intake air passage, the intake air passage and the intake air passage are rotated by rotating like a valve body. Any structure is possible, such as changing the intake ratio from and.

[0046]

According to the suction port body for electric cleaning according to the first aspect of the present invention, the suction amount is relatively increased by increasing or decreasing the amount of intake air from the intake port by adjusting the opening and closing of the intake air passage by the intake adjusting means. The amount of intake air from the inlet decreases and increases, and the rotation speed of the air turbine that rotates with the intake airflow increases and decreases due to the increase and decrease of the intake air amount from the intake port, and the suction power decreases and increases due to the decrease of the intake air amount from the intake port. With a relatively variable and simple configuration, you can easily change the cleaning mode according to the type of rotary cleaning body and the condition of the surface to be cleaned, such as for scraping dust and polishing the surface to be cleaned. The cleaning efficiency can be improved.

According to the suction inlet of the electric vacuum cleaner of the second aspect, in addition to the suction inlet of the electric vacuum cleaner of the first aspect, the intake adjusting means is slid to move the intake air passage with the shutter. Since the amount of intake air from the intake port is adjusted by opening and closing, the strength of the suction force from the intake port and the rotation speed of the rotary cleaning body due to the rotation of the air turbine can be easily adjusted with a simple structure. Corresponding to, it can be easily cleaned and cleaning efficiency can be improved.

According to the suction port body of the electric vacuum cleaner of claim 3, in addition to the suction port body of the electric vacuum cleaner of claim 1 or 2, there is provided a scraping means for scraping dust from the surface to be cleaned. Since a rotary cleaning member is used, for example, when it is not necessary to rotate the rotary cleaning member such as between the plates to be cleaned or in a fold, or when the rotary cleaning member is rotated at a low speed, the intake air amount from the intake port is adjusted by the intake air adjustment unit. The intake air amount is larger than the intake air amount, or the intake air amount from the intake port is reduced or the intake air amount is reduced to stop the rotation of the air turbine or rotate it at a low speed. The suction force is increased and dust can be sucked efficiently. On the other hand, for example, when it is necessary to scrape the dust by the scraping means of the rotary cleaning body due to the rotation of the rotary cleaning body such as a carpet on the surface to be cleaned, the intake amount is increased by the intake adjusting means. , The air turbine is rotated at a high speed by the intake airflow from the intake port to rotate the rotary cleaning body at a high speed to scrape out dust from the carpet, and the suction force from the suction port is reduced, and the suction port is in close contact with the carpet. It is possible to prevent the traveling performance from decreasing and improve the cleaning workability.

[Brief description of the drawings]

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

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

FIG. 3 is a rear perspective view of the same.

FIG. 4 is a perspective view showing the same shutter.

FIG. 5 is a plan sectional view showing another embodiment of the suction port body of the electric vacuum cleaner of the present invention.

[Explanation of symbols]

 11 Suction port main body 15 Case body 24 Suction port 34 Intake port 40 Communication pipe 48 Air turbine 61 Rotating blade as rotary cleaning body 62 Blade part as scraping means 71 Shutter as intake air adjusting means

Claims (3)

[Claims] 1. A case body having a suction port opened on a lower surface facing a surface to be cleaned and having an intake port opened separately from the suction port, and a case body provided on the case body and communicating with the suction port. A communication pipe communicating with the mouth through an intake air passage, a rotary cleaning member rotatably arranged in the case body, and a rotary cleaning member rotatably arranged in the intake air passage by an intake air flow. An intake port body for an electric vacuum cleaner, comprising: an air turbine that is rotationally driven; and an intake air adjustment unit that is provided in the case body and that opens and closes the intake air passage. 2. The suction port body of the electric vacuum cleaner according to claim 1, wherein the intake air adjusting means includes a shutter which is slidably provided and which opens and closes the intake air passage. 3. The suction port body of the electric vacuum cleaner according to claim 1, wherein the rotary cleaning body includes a scraping unit that scrapes dust from the surface to be cleaned.