JPH09248262A - Suction port body for vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suction port body with a simple structure by which dusts by a wall can be scraped out, a floor is polished, and cleaning efficiency is improved. SOLUTION: A communicating tube 32 provided on the under face in the rear center part of a casing 15 and communicating a first suction port 20 and a second suction port via a suction air path 34 is backwardly led and rotatably axially supported. A turbine chamber 38 for rotatably housing a shaft member of a flat air turbine 37 between a first cleaning member chamber 18 and a second cleaning member chamber 19 is provided in the almost center of the casing 15. A first rotary blade 63 spirally having a cloth blade part for polishing floor and a double blade part for scraping out dusts in a spiral state is axially supported in the first cleaning member chamber 18 on the front side of the running direction. A second rotary blade 63 having a spiral blade 67 for scraping dusts is axially supported in the second cleaning member chamber 19 on the rear side. The rotary blades 63 and 64 are rotated by the air turbine 37 which is rotated by a spiral suction air current from a suction opening 44, thus cleaning even by the wall.

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. A turbine having a suction air passage between it and a communication pipe, and rotatably accommodating a flat air turbine that rotates a rotary cleaning body by being rotated by an intake airflow between an intake port opening on the upper surface and the communication pipe. Equipped with an intake air passage with a chamber in the middle, a valve element is provided at the confluence of the intake air passage and the intake air passage, and the intake air passage is opened and closed by switching the valve body to adjust the intake and intake amounts. are doing.

[0004]

However, in the suction port body of the conventional electric vacuum cleaner disclosed in the specification of US Pat. No. 2,904,816, since there is only one rotary cleaning body, for example, a thread entwined with a carpet or the like is used. Dirt and hair cannot be scraped out sufficiently, and improvement in cleaning performance cannot be expected.

By the way, in the conventional suction port of the electric vacuum cleaner, there is known a structure in which two rotary cleaning bodies are provided in the front-rear direction of the traveling direction in order to improve the cleaning performance.

Therefore, it is conceivable to provide a plurality of rotary cleaning bodies in the suction port body of the conventional electric vacuum cleaner described in US Pat. No. 2,904,816. However, if a plurality of rotary cleaning bodies are simply provided, the suction port is provided. There is a problem that it is not possible to reduce the size of the body, cleaning of narrow places such as furniture gaps becomes complicated, and it is difficult to clean up to the wall.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a suction port body of an electric vacuum cleaner which has a simple structure and is capable of cleaning up to a wall and improving cleaning efficiency.

[0008]

A suction port body for an electric vacuum cleaner according to claim 1 has a case body having a cleaning body chamber opening downward on a lower surface facing a surface to be cleaned, and the case body. Communication pipe provided in the cleaning body chamber, a plurality of rotary cleaning bodies rotatably arranged in the cleaning body chamber and located in the front-back direction of the traveling direction, and these rotary cleaning bodies are driven to rotate. The rotary cleaning body provided with a drive means and located on the foremost side in the traveling direction has a floor polishing means and a scraping means. The rotary cleaning body is rotationally driven by the drive means and is located at the foremost side in the traveling direction. Since the floor polishing means and the scraping means are provided on the body, it is possible to scrape dust up to the wall and polish the surface to be cleaned with a simple structure, and the cleaning efficiency on the wall is improved regardless of the type of the surface to be cleaned.

The suction port body of the electric vacuum cleaner according to claim 2 is
A case body having a cleaning body chamber that opens downward on the lower surface facing the surface to be cleaned, a communication pipe that is provided in the case body and communicates with the cleaning body chamber, and is located in the front-back direction of the traveling direction. A plurality of rotary cleaning bodies rotatably arranged in the cleaning body chamber and a drive unit for driving the rotary cleaning bodies to rotate are provided. Since the rotary cleaning body, which is smaller in diameter than the outer diameter of the cleaning body and is located on the forefront side in the traveling direction, which is rotationally driven by the drive means, is formed to be smaller in diameter than the outer diameters of the other rotary cleaning bodies, The distance from the contact position of the rotary cleaning body located on the side to the surface to be cleaned to the wall side becomes small, and cleaning to the wall side is possible with a simple structure, and the cleaning efficiency 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. 6, 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. A lower body case 12 and an upper body case 13 made of the same material that is joined and fixed to the upper body case 12 are joined together by sandwiching a bumper 14 along the peripheral surfaces including the front surfaces of the lower body case 12 and the upper body case 13, thereby forming a rectangular shape. A case body 15 having a shape is formed.

The lower main body case 12 has a rib portion 17 formed substantially vertically on the upper surface thereof, and has a groove-like first cleaning body which is laterally elongated in the lateral direction on the front side, which is the traveling direction side, and opens on the lower surface. The chamber 18 is partitioned and formed on the rear side, which is the backward direction side, similarly, the second cleaning body chamber 19 in the shape of a groove that is horizontally long in the substantially left-right direction and opens to the lower surface is defined. Further, the lower body case 12 is partitioned by the rib portion 17 from the substantially central portion between the first cleaning body chamber 18 and the second cleaning body chamber 19 to one end side, and has a function as a leak port on the lower surface. A first suction chamber 21 opening the first suction port 20, a first drive transmission chamber 22 partitioned from substantially the center to the other end, and a second cleaning body chamber partitioned substantially at the rear rear center
A second suction port 23, which also functions as a leak port, is opened at substantially the center of the upper surface of 19, and a second suction chamber 24 communicating with the first suction chamber 21 and the other end side of the first drive transmission chamber 22 And a second drive transmission chamber 25 that is sectioned. The first
The opening area of the suction port 20 is formed larger than the opening area of the second suction port 23.

Further, on the lower surface of the lower main body case 12, there is a concave portion located on the end side opposite to the first suction port 20 for communicating the first cleaning body chamber 18 and the second cleaning body chamber 19 with each other. A groove-shaped communication recess 27 is provided, and a groove-shaped communication air passage 28 that connects the first cleaning body chamber 18 and the first suction port 20 is provided.

The lower surface of the second drive transmission chamber 25 is opened downward, and a closing plate 29 is detachably attached to this opening by a mounting tool 30.

Further, in the center of the rear part of the case body 15, a communication pipe 32 is pivotally supported by the lower body case 12 and the upper body case 13 so as to face the second suction port 23 and pivot shafts 33, 33. And is rotatably attached at a predetermined angle in the vertical direction. The first suction chamber 21 and the second suction chamber 24 communicate with the communication pipe 32 to form a suction air passage 34. Further, the rear end portion of the communication pipe 32 projects rearward outward from the suction port main body 11, and the front end portion of the bent connecting pipe 35 is rotatably fitted to the rear end portion. The connection pipe 35 is detachably connected to the hose via an extension pipe (not shown) and further connected to an electric vacuum cleaner body (not shown).

The second suction port 23 having an opening area smaller than the opening area of the first suction port 20 is closer to the communication pipe 32 than the first suction port 20. And the suction force from the second suction port 23 are substantially the same.

On the other hand, at a substantially central portion of the case body 15, a middle case 39 is fixedly attached, which defines a turbine chamber 38 that rotatably accommodates a flat type air turbine 37 serving as a driving means. The middle case 39 includes a substantially funnel-shaped lower case 40 having a large diameter at the upper part and a small diameter at the lower part, and an upper case 41 for closing the upper part of the lower case 40.

Further, the middle case 39 is formed with an intake air supply passage 43a along the circumferential direction, one end of which extends in a trumpet shape in the circumferential direction on the outer peripheral surface and the other end of which opens to the turbine chamber 38. The intake air supply passage 43a is formed in a scroll-like communication with the turbine chamber 38 so that the width becomes gradually narrower and the cross-sectional area becomes gradually smaller, and the suction airflow is supplied to the air turbine 37 in a spiral manner. The upper surface of a part of the intake air supply passage 43a reaching the turbine chamber 38, that is, the upper surface of the intake supply air passage 43a located at the front side of the case body 15, is constituted by the upper main body case 13. And this intake supply air passage 43a
The one end of the trumpet-shaped opening is opposed to and communicates with an intake port 44 formed over a rear surface that is a substantially vertical surface of the rear portion of the upper body case 13 and an upper surface that is continuous with the rear surface. The intake port 44 is formed by forming a plurality of small-diameter holes, and is formed to be open at one side of the communication pipe 32.

Further, a communication hole 45 is formed on the surface of the middle case 39 which faces the second suction chamber 24, and the intake hole 44 is formed through the intake air supply passage 43a, the turbine chamber 38 and the communication hole 45. Two
An intake air passage 43 communicating with the suction chamber 24 is formed. Also,
Since the communication hole 45 opens facing the second suction chamber 24, it is located on the intake air passage 43 from the turbine chamber 38 to the communication pipe 32, that is, on the downstream side of the air turbine 37 and through the suction air passage 34. The first suction port 20 is open for communication, and the second suction port 23
Opens directly.

A bearing mounting rib 48 for mounting a first bearing 47, which is a bearing, is provided substantially at the center of the lower surface of the upper case 41 of the middle case 39, and the lower case of the middle case 39 is provided.
A bearing mounting rib 50 for mounting a second bearing 49, which is a bearing coaxially with the first bearing 47, is provided substantially at the center of the upper surface of the 40.

Further, the air turbine 37 is shown in FIGS.
As shown in FIG. 5, a rectifying plate 54 that expands toward one end side is provided on a peripheral surface of a substantially cylindrical shaft support 53 into which a rod-shaped shaft 52 is inserted, and the other end near the peripheral edge of the rectifying plate 54 is provided. A plurality of curved wind receiving plates 55 are formed on the side surface so as to protrude substantially in a radial shape. Further, an air turbine pulley 56 is integrally provided at an end of the shaft 52 on the side where the wind receiving plates 55 are provided.

In the air turbine 37, the air turbine pulley 56 faces the first drive transmission chamber 22 and is projected from the lower end of the middle case 39, so that both ends of the shaft body 52 have the first bearing.
An axial direction is substantially vertically supported by the 47 and the second bearing 49, and is rotatably supported in the turbine chamber 38.
The middle case 39 is accommodated and fixed in the case body 15 such that the second bearing 49 is located substantially at the center between the first cleaning body chamber 18 and the second cleaning body chamber 19.

A driven rear wheel chamber 59 is provided on both sides of the communication pipe 32 of the lower main body case 12, in which a driven rear wheel 58 is rotatably supported, and driven front wheels 60 are rotatably supported at both front end sides. A driven front wheel chamber 61 that is axially supported is formed.

On the other hand, in the first cleaning body chamber 18 and the second cleaning body chamber 19, the first rotary blade 63 as a rotary cleaning body is provided.
And a second rotating blade 64 are rotatably arranged. The second rotating blade 64 has a mandrel 66 provided with a spiral groove 65 in the circumferential direction clockwise on the peripheral surface of, for example, an aluminum alloy.
A plurality of, for example, four blade portions 67, which are scraping means as a cleaning member made of flexible vinyl chloride, are spirally engaged with the groove portion 65 so as to protrude in a wall shape on the outer peripheral surface. I have. The blade portion 67 is formed by forming a pedestal portion 69 in which one side edge of an elongated flat plate portion 68 in the longitudinal direction engages with the groove portion 65 of the mandrel 66 to have a large thickness.

Further, as shown in FIGS. 10 and 11, the first rotary blade 63 is a cloth blade which is a floor-polishing means as a cleaning member having a flexible outer peripheral surface and brushed 70 on one surface. A plurality of, for example, two double blade portions 72, which are a scraping means as a cleaning body having a substantially Y-shaped cross section having flexibility, are provided alternately in a spiral shape. The cloth blade portion 71 is formed, for example, by forming a thick pedestal portion 69 made of soft vinyl chloride on one side edge in the longitudinal direction of an elongated plate-like raised cloth 73 made of polyester and provided with a raised 70 on one surface. Have been. The double blade portion 72 is a plate portion of the blade portion 67.
The plate portion 68 is formed to have a substantially Y-shaped cross section as if branched from the plate 68. Then, the length dimension of the cloth blade portion 71 protruding from the mandrel 66 is longer than the length dimension of the double blade portion 72 protruding from the mandrel 66, and when the surface to be cleaned is between the plates, only the cloth blade portion 71 is between the plates. The flooring effect, which is floor polishing, is obtained by contact.

Further, the first rotary blade 63 and the second rotary blade 63
At one end of the rotary blade 64, a pulley 75 is provided integrally with the mandrel 66, respectively. The first rotary blade 63 and the second rotary blade 64 are arranged such that the respective pulleys 75, 75 are located in the second drive transmission chamber 25, and the shaft portions 76, rotatably provided at both ends in the axial direction. 76 are respectively engaged with bearings 77 provided on the case body 15 and supported rotatably.

The first rotary blade 63 and the second rotary blade 64 are formed such that the outer diameter of the first rotary blade 63 is smaller than that of the first rotary blade 63, and the lower end of each of the first rotary blades 63 is the first cleaning body chamber. 18 and the second cleaning body chamber 19 projecting slightly downward from the openings in the lower surface, and only the tip of the cloth blade portion 71 is formed with the driven front wheels 60, 60 and the driven rear wheels 58, 58. It is provided so as to project further downward.

On the other hand, in the first drive transmission chamber 22, a drive conversion means 79 which is a drive transmission means is arranged. This drive converting means 79, as shown in FIG. 1, FIG. 4 and FIG.
A box body located on the end side of the first drive transmission chamber 22
A substantially rod-shaped first shaft 81 whose axial direction extends along the up-down direction is rotatably supported in 80. Then, at the lower end of the first shaft 81, a first endless belt 82a which is a drive transmitting means by the air turbine pulley 56 of the air turbine 37.
A first pulley 83 around which the first drive transmission chamber 22 is provided is provided, and a first bevel gear 84a is provided at the upper end.

Further, in the box body 80, a substantially rod-shaped second shaft 85 and a third shaft 86 are arranged rotatably vertically in parallel along the laterally long direction of the case body 15.
The second shaft 85 has the first shaft 81 at one end.
A second bevel gear 84b engaging with the first bevel gear 84a is provided, and the second pulley 87 facing the second drive transmission chamber 25 at the other end.
And a first gear 88a is provided at one end side of the intermediate portion. Further, a second gear 88b is provided at one end of the third shaft 86 to engage with the first gear 88a of the second shaft 85, and the other end faces the second drive transmission chamber 25. A third pulley 89 is provided. The second pulley 87 of the second shaft 85 is attached to the pulley 75 of the first rotating blade 63.
The second endless belt 82b, which is a drive transmission means, is slanted around the third pulley 89 of the third shaft 86 and the pulley 75 of the second rotary blade 64. An endless belt 82c, which is a drive transmission means, is laid across in a substantially horizontal direction.

As shown in FIG. 6, the center of the second shaft 85 is located closer to the second rotary blade 64, that is, above the intermediate position between the first rotary blade 63 and the second rotary blade 64. The second shaft 85 located at
Is positioned so as to increase the distance between the first rotating blade 63 and the first rotating blade 63 which is inclined over the shaft 85. Also,
The third shaft 86 is located in a substantially horizontal direction with respect to the second rotating blade 64 that is bridged substantially horizontally with the third shaft 86, and between the third shaft 86 and the second rotating blade 64. Are positioned so that the distance between them becomes shorter.

Then, the rotation of the air turbine 37 causes the first
The first shaft 81 rotates via the endless belt 82a of
By this rotation, the first bevel gear 84a and the second bevel gear 84a
The second shaft 85 rotates via b. With the first gear 88a and the second gear 88b meshing with each other by the rotation of the second shaft 85, the third shaft 86 rotates in the opposite direction with respect to the second shaft 85, and the second endless belt
The first rotary blade 63 rotates in the forward direction with respect to the forward direction of the suction port main body 11 via the second rotary blade 82b.
Numerals 64 are reversely rotated with respect to the forward direction of the suction port main body 11, that is, rotate inward with each other. The first
The rotating blade 63 rotates toward the raised side 70 of the cloth blade portion 71.

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

At the time of cleaning, the suction port body 11 is connected to the electric vacuum cleaner body (not shown) through an extension tube and a hose,
The end portion of the hose on the extension tube side is gripped and pushed to move the suction port main body 11 back and forth while making contact with the floor surface which is the surface to be cleaned.

Then, by the suction force of the main body of the vacuum cleaner, it is sucked from the suction port 44 and also sucked from the first suction port 20 and the second suction port 23. Where the suction body
11 is placed on the floor, the first suction port 20
Are a first rotating blade 63 and a second rotating blade 64
Since the first rotary blade 63 and the second rotary blade 64 are located between them, they are sealed by the floor and the negative pressure on the lower surface of the suction port main body 11 increases. By the way, the second suction port 23 that is closer to the communication pipe 32 than the first suction port 20 is
A second rotating blade for opening into the second cleaning body chamber 19;
Since the air passage resistance increases at 64 and the opening area is smaller than the opening area of the first suction port 20, the first suction port
The suction force from 20 and the suction force from the second suction port 23 are almost the same. Therefore, the ratio of the suction amount from the first suction port 20 and the second suction port 23 and the suction amount from the suction port 44, which are substantially the same, is the negative pressure of the lower surface of the suction port main body 11 facing the floor. Due to the increase, the rate at which the amount of intake air from the intake port 44 increases is obtained.

When the floor surface is a carpet such as a carpet having a particularly long foot, the first suction port 20 facing the floor surface is closed. Therefore, the negative pressure on the lower surface of the suction port body 11 when the floor surface is a carpet is larger than the negative pressure on the lower surface of the suction port body 11 when the floor surface is between the plates, etc. The intake volume increases.

The air sucked from the intake port 44 passes through the trumpet-shaped intake air supply passage 43a whose cross-sectional area is gradually reduced while being rectified and reaches the turbine chamber 38 in a spiral shape. The air turbine 37 rotates at a speed proportional to the amount of intake air. This rotational drive force is transmitted to the drive converting means 79 via the first endless belt 82a, and the drive converting means 79 converts the rotational drive about the vertical direction into two rotational drive forces about the horizontal direction. By being converted, the first rotary blade 63 and the second rotary blade 64 rotate in opposite directions at a speed proportional to the intake air amount via the second endless belt 82b and the third endless belt 82c. Then, the rotation of the first rotary blade 63 and the second rotary blade 64 scrapes out the dust 90 from the floor surface, and the dust 90 located in the first cleaning body chamber 18 is communicated with the communication air passage. 28
The dust 90 which is sucked from the first suction port 20 and located in the second cleaning body chamber 19 is sucked through the second suction port 23 as it is. Further, the suction airflow that has flowed into the turbine chamber 38 flows from the second suction chamber 24 to the communication pipe via the communication hole 45.

Since the first suction port 20 is located on the spiral direction side of the first rotary blade 63, the dust 90 in the first cleaning body chamber 18 has a suction force as shown in FIG. Is sucked in and the spiral direction in a rotated state, that is, the direction guided by the cloth blade portion 71 and the double blade portion 72 is the same direction, so that the dust 90 scraped out from the floor surface has a suction force. The cloth blade portion 71 and the double blade portion 72 smoothly pass through the communication air passage 28 to the first suction port 20.
Sucked into. In addition, the second suction port 23 is opened substantially at the center of the second cleaning body chamber 19, and the second rotating blade 64 is reversely rotated in a direction opposite to the spiral direction of the first rotating blade 63, Direction of suction by suction force and blade part
The direction guided by 67 is the opposite direction, and the second suction port
Part of the dust 90 that is not sucked in from the 23 is moved by the blade 67 in a direction away from the second suction port 23, and is located at the end on the guided side and opposite to the first suction port 20. The first cleaning body chamber 18 is guided to the first cleaning body chamber 18 through a communication recess 27 that communicates the second cleaning body chamber 19 and the first cleaning body chamber 18 provided on the side of the first cleaning body chamber 18. It is sucked into the suction port 20.

When the floor surface is between the plates, only the cloth blade portion 71 of the first rotary blade 63 located on the front side in the traveling direction comes into contact with the spaces between the plates, and the dust on the spaces between the plates reaches to the wall.
Raise 90 so that it sweeps up, and flooring between the boards to the wall.

By the way, since the intake port 44 has a smaller opening area than the first intake port 20 and the second intake port 23, and the air turbine 37 serving as the air passage resistance is located in the intake air passage 43,
The suction from the first suction port 20 and the second suction port 23 is almost impossible, and the suction force from the first suction port 20 and the second suction port 23 is reduced. And the first
The dust 90 is scraped off by the rotation of the rotating blade 63 and the second rotating blade 64, so that the dust 90 is easily sucked, and almost no suction is left due to a decrease in the suction force.

Here, when the hose is placed on the floor surface by moving furniture or the like, the lower surface of the suction port main body 11 is separated from the floor surface, or the first suction port 20 and the second suction port 23 are large. If something is sucked in and blocked, the first rotating blade 63
And when thread dust, hair, etc. are entangled in the second rotating blade 64, these are removed, so when the suction port body 11 is lifted from the floor surface, the negative pressure on the lower surface of the suction port body 11 is reduced, The ratio of the amount of suction from the first suction port 20 and the second suction port 23 to the amount of suction from the suction port 44 increases the amount of suction from the first suction port 20 and the second suction port 23. It becomes a ratio. Furthermore, a communication pipe from the turbine chamber 38 of the intake air passage 43
The suction air passage 34 is located downstream of the air turbine 37 up to 32
Since the first suction port 20 communicates with and opens the second suction port 23 directly, the suction air flow in the intake air passage 43 generated by the intake air from the intake port 44 is greatly reduced, The rotation speed of the turbine 37 is greatly reduced or stopped,
The rotation speeds of the first rotary blade 63 and the second rotary blade 64 are also greatly reduced or stopped.

The first rotary blade 63 and the second rotary blade 63
When removing the first rotating blade 63 and the second rotating blade 64 in order to remove lint, hair and the like entangled with the rotating blade 64, the mounting device 30 is removed and the closing plate is removed.
29, remove the shaft 76 on the side where the pulley 75 is not
The shaft 76 on the pulley 75 side is removed from the bearing 77 by moving the pulley 75 side downward with the fulcrum as a fulcrum, and the second endless belt 82b
In addition, the pulley 75 can be removed from the third endless belt 82c, and the shaft portion 76 serving as a fulcrum can be removed from the bearing 77 to remove it. The reverse operation is carried out when assembling.

According to the above-described embodiment, the cloth blade portion 71, which is a floor polishing means having a floor polishing effect on the first rotary blade 63 located on the front side in the traveling direction, and the scraping means having a dust cleaning effect. Since the blade portion 67 is provided, the flooring effect can be obtained up to the wall edge, dust can be scraped out up to the wall edge, and regardless of the type of floor surface, it is possible to clean up to the wall edge without separately switching according to the state of the floor surface.

Further, since the scraping effect of the blade portion 67, which is reduced by providing the cloth blade portion 71 on the first rotary blade 63, is compensated by providing the double blade portion 72, when the suction port body 11 is moved forward and backward. The cleaning effect can be made substantially equal, and the cleaning efficiency can be further improved.

Further, since the outer diameter of the first rotary blade 63 located on the front side is smaller than the outer diameter of the second rotary blade 64, the first rotary blade 63 is arranged up to the foremost part in the case body 15. In addition to being installed, the distance between the position where the first rotary blade 63 comes into contact with the floor surface and the edge of the wall can be shortened, and the edge of the wall can be cleaned.

Moreover, since the outer diameter of the first rotating blade 63 is smaller than the outer diameter of the second rotating blade 64, the load from the floor surface of the first rotating blade 63 is reduced, so that the suction port main body Since the driving force is transmitted to the second rotating blade 64 on the rear side even if the rear side of the suction port main body 11 is strongly pressed against the floor surface via the communication pipe 32 during the forward movement of the second rotating blade.
Cleaning by 64 can be performed reliably.

On the other hand, since the first suction port 20 and the second suction port 23 for sucking the dust 90 are located at the downstream side of the air turbine 37 from the turbine chamber 38 of the intake air passage 43 to the communication pipe 32, they are opened. At the time of cleaning, a negative pressure on the lower surface of the case body 15 is obtained on the floor surface, and the airflow 37 rotatably provided in the intake air passage 43 is efficiently rotated by the intake airflow from the intake port 44 to rotate the rotating blades 63. , 64 rotate to scrape out dust 90 from the floor surface and efficiently inhale through the suction ports 20 and 23, and each suction port 2
When the lower surface of the case body 15 is separated from the floor surface by a predetermined distance by lifting the case body 15 or the like by 0 and 23 acting as a suction port for sucking the dust 90, the lower surface of the case body 15 is downstream of the air turbine 37. The first suction port 20 located in the intake air passage 43 on the side and opened via the suction air passage 34, and the second opening directly opened
The suction port 23 is opened and the intake air amount from the intake port 44 is greatly reduced, the rotation of the air turbine 37 is stopped or greatly reduced, and the rotation of each rotating blade 63, 64 is stopped or greatly reduced. , 23 acts as a leak port.

Therefore, the scraped-out dust 90 can be easily sucked in efficiently from the first suction port 20 and the second suction port 23 where the negative pressure is secured, and the first suction port 20 can be cleaned. Also, when the suction port body 11 is lifted to the second suction port 23, the rotation of the air turbine 37 is reduced and each rotary blade 6
Since it also has a function as a leak port that lowers the rotation of 3, 64, it has both a function as a suction port that sucks dust 90 with a simple structure, and there is no need for an opening and closing means for opening and closing the leak port. The rotation of the rotary blades 63 and 64 can be easily reduced with a simple structure, the size and weight can be easily reduced, and the wind noise caused by the rotation of the rotary blades 63 and 64 can be reduced.

Furthermore, the first cleaning body chamber 18 and the first suction port
The first suction port 20 is located downstream of the air turbine 37 from the turbine chamber 38 of the intake air passage 43 to the communication pipe 32 via the suction air passage 34. Since it is opened, the scraped-out dust 90 can be easily sucked from the first suction port 20 where a negative pressure is secured. That is, it has a function as a leak port that reduces the rotation of the air turbine 37 when the suction port body 11 is lifted, and the dust 90
Both of the functions as a suction port can be achieved with a simple structure, and the leak action can be further increased.

Since the communication air passage 28 has a concave groove shape, dust 90
It can be prevented from being caught, and maintenance management such as removal of dust 90 can be done easily. The communication air passage 28 may have a structure in which the first cleaning body chamber 18 and the first suction chamber 21 communicate with each other by a tubular object.

In addition, the first cleaning body chamber 18 and the first suction port 20
Are communicated with each other in the groove-shaped communication air passage 28, and the closed state of the first suction port 20 and the communication air passage 28 differs depending on the type of the surface to be cleaned, for example, between the boards, tatami mats, carpets, etc. The pressures are different, and the ratio between the amount of suction from the first suction port 20 and the second suction port 23 and the amount of suction from the suction port 44 varies. Therefore, when the space is between the plates, the suction amount from the intake port 44 is small and the rotation of each of the rotating blades 63 and 64 is low. In the case of a carpet, the suction amount from the intake port 44 is large and each rotating blade is large. Since the rotation of 63, 64 increases, a separate floor surface detection means is not required, and each rotating blade 63, 64 has a simple structure according to the floor surface.
The rotation of can be changed, and cleaning workability and cleaning efficiency can be further improved.

Further, since the second suction port 23 opens downstream from the communication hole 45 through which the intake air passage 43 communicates with the communication pipe 32, the second suction port 23 opens when the suction port body 11 is lifted. Since the suction resistance from the second suction port 23 is smaller than the suction resistance from the suction port 44 to the communication hole 45 through the turbine chamber 38 and is located on the downstream side, the second suction port 23 acts similarly to the leak port. Since the air is easily taken in through the second suction port 23, the rotation of the air turbine 37 can be further reduced, and the rotary blades 63,
64 rotations can be reduced.

In addition, the first rotating blade 63 and the second rotating blade 64, which are spiral-shaped in the clockwise direction, are rotated inward in the opposite direction in which the spiral direction is opposite to that of the first rotating blade 63. The first suction port 20 is opened on the spiral side in the rotated state, and the first cleaning body chamber
Since the 18 and the second cleaning body chamber 19 are communicated with each other through the communication recessed portion 27 provided on the spiral direction side of the first rotary blade 63 on the side opposite to the first suction port 20, the suction of the first suction port 20 is performed. The direction of being sucked by the force and the direction of being guided by the cloth blade portion 71 and the double blade portion 72 of the first rotary blade 63 are the same, and the dust 90 scraped out from the floor surface is attracted by the cloth blade portion 71 and the cloth blade. The part 71 and the double blade part 72 are smoothly sucked into the first suction port 20 through the communication air passage 28. Further, the second suction port is provided at the blade portion 67 of the second cleaning body chamber 19.
The dust 90 moved in a direction away from 23 is guided to the first cleaning body chamber 18 through the communication recess 27,
Is sucked into the suction port 20. Therefore, each cleaning body room 18,
It is possible to prevent the dust 90 from remaining in the interior of the suction port 19 without being sucked, thereby improving the cleaning performance, reducing contamination by the dust 90 on the lower surface of the suction port main body 11, and reducing the frequency of maintenance management.

Since the communication recess 27 has a groove shape, the dust 90 is not caught and is removed as compared with the case where the communication air passage 28 is formed into a tubular shape by a tubular material. Easy maintenance management. The communication recess 27 may have a structure in which the first cleaning body chamber 18 and the second cleaning body chamber 19 communicate with each other by a tubular member.

Further, the first suction chamber 21 is opened by displacing the first suction port 20 from the center to one end side, and the first suction chamber 21 communicating adjacent to the second suction chamber 24 facing the communication pipe 32 is formed. A middle case 39 formed above and accommodating the air turbine 37 is formed into a case body 15
, The intake air passage 34 from the first intake port 20 and the intake air passage 43 from the intake port 44 through the turbine chamber 38 are not positioned vertically, so that the vertical dimension can be further reduced. And further downsizing.

Further, the second shaft 85, which inclines the second endless belt 82b around the first rotary blade 63, is moved from the intermediate position between the first rotary blade 63 and the second rotary blade 64 to the first position. The third endless belt is disposed on the second rotating blade 64 at a position where the distance on the side of the second rotating blade 64 is long.
The third shaft 86, which bridges 82c in a substantially horizontal direction,
When the first rotating blade 63 and the second rotating blade 64 are removed, the second rotating blade 64 is disposed at a position where the distance on the second rotating blade 64 side is shorter than the intermediate position between the first rotating blade 63 and the second rotating blade 64. Cleaning body chamber by rotation of
The first rotating blade 63 and the second rotating blade 64 can be prevented from contacting the lower opening edges of the cleaning body chamber 18 and the second cleaning body chamber 19 from becoming difficult to remove, and the first rotating blade 63 can be easily removed.
And the second rotating blade 64 can be attached and detached.

The shaft 52 of the scroll flat type air turbine 37 capable of obtaining a large torque is attached to the first cleaning body chamber 18
A second bearing 49, which is axially positioned between the second cleaning body chamber 19 and the second cleaning body chamber 19 and vertically supports the shaft body 52.
Is disposed below the upper ends of the rotary blades 63, 64 between the first cleaning body chamber 18 and the second cleaning body chamber 19, so that the air turbine 37 is installed in the first cleaning body chamber 18 and the second cleaning body chamber 18. Since they are located in a state of overlapping on the second cleaning body chamber 19, air can be obtained despite the large torque required to rotate and drive a plurality of, for example, two rotary blades 63, 64 in order to improve the cleaning performance. The space dimension before and after the traveling direction for disposing the turbine 37, and the second bearing 49 which is a bearing
The space size in the vertical direction for arranging the can be reduced, and the size can be reduced. Since the air turbine 37 has the flow straightening plate 54 that expands toward the one end side, the first bearing 47 that is a bearing is used by utilizing the space on the expansion side of the flow straightening plate 54. It can be installed and further miniaturization can be achieved.

Further, drive transmission means for transmitting the drive of the air turbine 37 to the rotary blades 63, 64, that is, the first transmission means
Since the endless belt 82a and the drive converting means 79 are disposed separately from each other between the first cleaning body chamber 18 and the second cleaning body chamber 19 on the side opposite to the suction air passage 34, the vertical dimension is reduced. The second endless belt 82b can be reduced in size and further downsized, and separated from the suction air passage 34 via the drive converting means 79.
And the first rotating blade 63 with the third endless belt 82c.
And, in order to transmit the drive to the end portion of the second rotary blade 64, the first dust-free belt 82a, which is the drive transmission means, the drive conversion means 79, the second endless belt 82b, are sucked in by the dust 90.
Also, the third endless belt 82c is not contaminated and maintenance is easy.

Further, the scroll deflection type air turbine 37
A suction air passage 43a for supplying a suction airflow in a spiral shape is located on the side opposite to the suction air passage 34 from the first suction port 20 communicating with the first cleaning body chamber 18 located on the front side in the traveling direction. As a result, the intake air passage 34 and the intake supply air passage 43a do not overlap, and the size can be further reduced.

Then, the intake port 44 of this intake air supply passage 43a
Is formed on the rear side where the communication pipe 32 extends, so that the air inlet 37 is not blocked by walls, furniture, curtains, etc. during cleaning, so that the air turbine 37 can be efficiently rotated and the communication pipe 32 is The swirling suction airflow can be easily rectified and supplied to the turbine chamber 38 by effectively utilizing the supporting space, so that the driving torque of the air turbine 37 can be further improved and the size can be easily reduced.

Further, since the air intake port 44 is formed at a position which is substantially vertical to the case body 15, it is possible to prevent the air intake port 44 from being closed due to the accumulation of fine dust in the air on the air intake port body 11. Reduction of intake efficiency can be suppressed, and the air turbine 37 can be efficiently rotated.

Further, since the intake port 44 is formed at the rear side where the communication pipe 32 is led out, the intake port 44 is not blocked by a wall, furniture, curtain, etc. during cleaning, and the air turbine 37 is efficiently rotated. In addition, the space for axially supporting the communication pipe 32 can be effectively used to form the intake air supply air passage 43a for rectifying and supplying the spiral suction airflow to the turbine chamber 38, which further increases the drive torque of the air turbine 37. Improvement and miniaturization can be easily achieved.

Further, since the intake port 44 is formed at a position which is substantially vertical to the case body 15, it is possible to prevent the intake port 44 from being closed due to the accumulation of fine dust 90 in the air on the intake port body 11. The reduction of intake efficiency can be suppressed, and the air turbine 37 can be efficiently rotated.

Further, the air turbine 37 in the turbine chamber 38 from the intake port 44 which is not blocked by walls, furniture, curtains, etc.
Supply air path to supply the air in a spiral
43a is opened to the front side of the turbine chamber 38 and formed into a trumpet shape having an interference function so that the width gradually becomes narrower from the intake port 44, so that the opening to the turbine chamber 38 is gradually opened with a simple structure. The intake supply air passage 43a having a small area rectifies the intake airflow, and can reduce wind noise and the like of the air turbine 37, thereby reducing noise.

In the above embodiment, not only the canister type vacuum cleaner but also the upright type in which the suction port main body 11 is directly formed on the lower surface of the vacuum cleaner main body,
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.

Further, a valve body or a shutter may be separately provided in the middle of the intake air passage 43 so that the rotational speed of each rotary blade 63, 64 can be varied by continuously adjusting the opening.

On the other hand, the rotary cleaning body is a rotary blade.
In addition to 63 and 64, any one such as a rotary brush having a wall-shaped raised brush or a brush having only a cloth blade portion may be used.

Further, although two rotary cleaning bodies are provided in the above description, the same effect can be obtained by providing two or more rotary cleaning bodies.

[0068]

According to the suction port body for electric cleaning according to the first aspect of the present invention, the floor cleaning means and the scraping means are provided on the rotary cleaning body which is rotationally driven by the drive means and is located on the frontmost side in the traveling direction. With a simple structure, dust can be scraped out to the side of the wall and the surface to be cleaned can be polished, and the cleaning efficiency on the wall can be improved regardless of the type of the surface to be cleaned.

According to the suction port body of the electric vacuum cleaner of the second aspect, the rotary cleaning body located on the foremost side in the traveling direction which is rotationally driven by the drive means is formed to have a smaller diameter than the outer diameters of the other rotary cleaning bodies. Therefore, the distance from the contact position of the surface to be cleaned of the rotary cleaning body located on the foremost side in the traveling direction to the wall side becomes small, and the wall can be efficiently cleaned with a simple structure, and the cleaning efficiency can be improved.

[Brief description of drawings]

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

FIG. 2 is a bottom view of the same.

FIG. 3 is a rear view of the same.

FIG. 4 is a front sectional view of the same.

FIG. 5 is a sectional side view of the same.

FIG. 6 is a side sectional view showing a relationship between the drive converting means, the first rotary blade and the second rotary blade of the above.

FIG. 7 is a cross-sectional view showing the air turbine.

FIG. 8 is a bottom view of the same.

FIG. 9 is a plan view of the same.

FIG. 10 is a perspective view showing a first rotary blade of the above.

FIG. 11 is a sectional view of the same.

FIG. 12 is an explanatory diagram for explaining a situation in which dust is moved by the rotation of the rotary blade.

[Explanation of symbols]

 11 Suction port main body 15 Case body 18 First cleaning body chamber 19 Second cleaning body chamber 32 Communication pipe 37 Air turbine as driving means 63 First rotating blade as rotating cleaning body 64 Second as rotating cleaning body Rotating blade 67 Blade part that is a scraping means 71 Cloth blade part that is a floor polishing means 72 Double blade part that is a scraping means

Claims (2)

[Claims] 1. A case body having a cleaning body chamber that opens downward on a lower surface facing the surface to be cleaned, a communication pipe provided in the case body and communicating with the cleaning body chamber, and a front and rear direction in the traveling direction. Direction, the plurality of rotary cleaning bodies rotatably disposed in the cleaning body chamber, and drive means for driving the rotary cleaning bodies to rotate, and the rotary cleaning body located on the forefront side in the traveling direction. Is a suction port body for an electric vacuum cleaner, which has a floor polishing means and a scraping means. 2. A case body having a cleaning body chamber which opens downward on a lower surface facing the surface to be cleaned, a communication pipe provided in the case body and communicating with the cleaning body chamber, and a front and rear direction in the traveling direction. Direction, the plurality of rotary cleaning bodies rotatably disposed in the cleaning body chamber, and drive means for driving the rotary cleaning bodies to rotate, and the rotary cleaning body located on the forefront side in the traveling direction. Is a suction inlet of an electric vacuum cleaner having an outer diameter smaller than that of other rotary cleaning members.