JPH1033427A - Nozzle structure for vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simple nozzle structure in which an air turbine rotates efficiently for cleaning operation and in which the turbine rotates at a greatly reduced speed or stops when the cleaner is lifted. SOLUTION: A suction air duct 43 is provided which is in communication with a communicative tube from the nozzle, which opens on one side of the communicative tube of a nozzle case 15, through the communicative hole formed on the tube opposite to a first nozzle 20. A turbine chamber 38 axially supporting an air turbine 37 is provided inside the suction air duct 43. Opened on the lower face of a first cleaning unit chamber is the first nozzle 20 that is in communication with that chamber on the front side in the travelling direction of the nozzle case 15 and that opens through a suction air duct 34, into which the air duct 43 is merged at the communicative hole 45. A second nozzle is formed opposite to the communicative tube on a second cleaning unit chamber. A rotary blade is axially supported in each cleaning unit chamber. With a nozzle structure 11 lifted, each nozzle 20 is open, decreasing the negative pressure, decreasing that of the communicative hole 45, and greatly decreasing the air intake of the inlet. Synchronously with the air turbine 37, each rotary blade stops or greatly reduces its revolving speed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction port of a vacuum cleaner provided with an air turbine for driving a rotary cleaning body to rotate.

[0002]

2. Description of the Related Art Conventionally, as a suction port of a vacuum cleaner provided with this kind of air turbine, for example, US Pat.
The configuration described in the '816 specification is known.

The suction port of the vacuum cleaner described in the specification of US Pat. No. 2,904,816 is connected to a suction chamber which rotatably accommodates a rotary cleaning body and has a suction port opened on the lower surface, a hose, an extension pipe, and the like. A suction air path is provided between the communication pipe and the suction air path that rotatably accommodates an air turbine that rotates by a suction airflow and rotates a rotary cleaning body between an intake port that opens on the upper surface and the communication pipe. A valve element is provided at the junction of the intake air path and the intake air path, and the suction air path is opened and closed by switching the valve element to adjust the suction amount and the intake amount.

[0004]

However, in the suction port of the conventional vacuum cleaner described in the above-mentioned U.S. Pat. No. 2,904,816, the air path from the communication pipe to the suction port and the air path from the suction port to the suction port are different. Due to the isolation, the air path resistance from the communication pipe to the suction port is large, so the amount of suction from the suction port does not increase significantly when lifted up, and the amount of air intake from the air inlet to the air turbine decreases sufficiently. However, there is a problem that the rotation of the air turbine cannot be stopped or greatly reduced. For this reason, the wind noise of the rotary cleaning body when lifted is large. In order to solve this problem, a leak port and a lid that opens and closes the leak port are required. Dust entangles with the lid that opens and closes the open leak port, making opening and closing of the lid uncertain.If the suction port body is lifted, the leak port does not open, or the leak port does not open when placed on the floor. May not be blocked.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has a simple structure in which the rotation of the air turbine is greatly reduced or stopped when the air turbine is efficiently rotated and lifted during cleaning. It is intended to provide a suction port body.

[0006]

According to a first aspect of the present invention, there is provided a vacuum cleaner having a suction port opening on a lower surface facing a surface to be cleaned, and a suction port opening separately from the suction port. A case body, a communication pipe provided in the case body and communicating with the suction port, and a communication pipe provided in the case body and having one end communicating with the intake port and communicating with the communication pipe on the other end side with the communication pipe; An intake air passage opening a communication hole opposed to the suction port without being opposed, a turbine chamber provided in the intake air passage and rotatably accommodating an air turbine rotated by an intake air flow, and a lower surface of the case body And a rotary cleaning body that is rotatably disposed facing the air turbine and rotates by the rotation of the air turbine.At the time of cleaning, a negative pressure near the suction port is secured on the floor surface, and the air flow from the suction port In the intake air path The rotatable air turbine rotates efficiently, and the rotating cleaning body rotates to scrape dust from the surface to be cleaned, suck it in through the suction port, and lift the case body so that the lower surface of the case body moves from the surface to be cleaned to a predetermined position. When a distance is left, the suction port on the lower surface of the case body is opened, and the communication hole of the intake air passage downstream of the air turbine chamber is opened to face the suction port where the negative pressure is reduced and to face the communication pipe. Therefore, the negative pressure of the communication hole is reduced, the amount of intake air from the intake port is greatly reduced, the rotation of the air turbine is stopped or greatly reduced, the rotation of the rotary cleaning body is stopped or greatly reduced, and the air is sucked into the turbine chamber. Dust sucked from the mouth does not flow in, and a decrease in rotation efficiency due to dust adhering to the air turbine is prevented.

According to a second aspect of the present invention, the suction body of the vacuum cleaner comprises:
A case body having a suction port that opens on the lower surface opposite to the surface to be cleaned and a suction port that opens separately from the suction port, and a communication pipe provided in the case body and communicating with the suction port,
The suction device is provided in the case body, and has one end communicating with the suction port and the other end communicating with the communication pipe, and opening a communication hole facing the suction port without suction airflow flowing from the suction port. An air path, a turbine chamber provided in the intake air path and rotatably accommodating an air turbine rotated by an intake air flow, and rotatably disposed facing a lower surface of the case body and rotated by rotation of the air turbine. A rotating cleaning body that rotates, a negative pressure near the suction port is secured on the floor surface during cleaning, and the air turbine that is rotatably provided in the intake air path by the intake airflow from the intake port rotates efficiently. When the rotating body rotates to scrape dust from the surface to be cleaned and suck it in through the suction port, and when the lower surface of the case body is separated from the surface to be cleaned by The suction port on the underside of the air turbine is opened, and the communication hole of the intake air passage downstream of the air turbine chamber faces the suction port whose negative pressure has been reduced by opening, and the suction airflow flowing from the suction port to the communication pipe is connected. Since there is no backflow from the hole, the negative pressure in the communication hole is reduced, the amount of intake air from the intake port is greatly reduced, and the rotation of the air turbine is prevented by the suction airflow that flows backward. Since the rotation of the rotary cleaning body is stopped or greatly reduced, and a suction airflow including dust from the suction port does not flow into the turbine chamber, a decrease in rotation efficiency due to dust adhering to the air turbine is prevented.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a suction port of a vacuum cleaner according to an embodiment of the present invention.

In FIG. 1 to FIG. 6, reference numeral 11 denotes a suction port main body which is horizontally long in the traveling direction. The suction port main body 11 includes a lower main body case 12 made of a synthetic resin such as acrylonitrile-butadiene-styrene resin, and An upper body case 13 of the same material, which is joined and fixed to the upper part of the lower body case 12, is joined by sandwiching a bumper 14 along the peripheral surface including the front surfaces of the lower body case 12 and the upper body case 13, and is joined. A case body 15 having a shape is formed.

The lower body case 12 has a rib portion 17 formed substantially vertically on the upper surface, and a first cleaning body in the form of a concave groove which is horizontally elongated in the left-right direction on the front side which is the advancing direction side and opens on the lower surface. A chamber 18 is defined and a second cleaning body chamber 19 having a concave groove shape is also formed in the rear side, which is a retreating direction side, and is similarly horizontally long in the left-right direction and opened to the lower surface. 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 provided a communication portion which is located on the end side opposite to the first suction port 20 and communicates the first cleaning body chamber 18 and the second cleaning body chamber 19. A groove-shaped communication recess 27 serving as a passage 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 removably mounted on the opening by a mounting device 30.

In the center of the rear part of the case body 15, a communication pipe 32 is supported by the lower main body case 12 and the upper main body case 13 with the rotating shafts 33, 33 facing the second suction port 23. To be rotatable at a predetermined vertical angle. 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 of the communication pipe 32 protrudes rearward and outward from the suction port main body 11, and the front end of the bent connection pipe 35 is rotatably fitted to the rear end. The connection pipe 35 is detachably connected to a hose via an extension pipe (not shown), and further connected to a 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 has a smaller distance from 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, a middle case 39 for partitioning a turbine chamber 38 for rotatably accommodating an air turbine 37 serving as a flat driving means therein is mounted and fixed substantially at the center of the case body 15. 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.

In the middle case 39, an intake air supply passage 43a is formed in the outer peripheral surface along the circumferential direction, one end of which expands in a trumpet shape in the circumferential direction and the other end opens to the turbine chamber 38. The intake supply air passage 43a is formed in a scroll-like manner so as to communicate with the turbine chamber 38 so as to gradually narrow the cross-sectional area and gradually reduce the cross-sectional area, so as to supply the air flow 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 open end of the upper body case 13 communicates with an intake port 44 formed on a rear surface which is a substantially vertical rear surface of the upper main body case 13 and an upper surface 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, on the surface of the middle case 39 which faces the first suction port 20 but does not face the communication pipe 32, dust and the like sucked from the first suction port 20 as shown in FIG. A plurality of slit-shaped communication holes 45 are formed so as not to enter the room. That is, the direction of the intake air passage 43 from the turbine chamber 38 through the communication hole 45 is the first direction.
A communication hole 45 is opened in a direction intersecting with a suction air passage 34 extending from the suction port 20 to the communication pipe 32. Then, from the intake port 44, the intake supply air passage 43a, the turbine chamber 38, the communication hole 45
An intake air passage 43 communicating with the first suction chamber 24 through the air passage is formed. Further, since the communication hole 45 is opened facing the first suction port 20, the intake air passage 43 extending from the turbine chamber 38 to the communication pipe 32.
Merges into the suction air passage 34 from the communication hole 45 and communicates with the communication pipe 32.

At substantially the center of the lower surface of the upper case 41 of the middle case 39, a bearing mounting rib 48 for mounting a first bearing 47 as a bearing 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.

The air turbine 37 is shown in FIGS.
As shown in FIG. 0, a rectifying plate 54 that expands toward one end side is provided on a peripheral surface of a substantially cylindrical shaft support portion 53 into which a rod-shaped shaft 52 is inserted. A plurality of curved wind receiving plates 55, 55 are formed on the end surface in a substantially radial manner so as to protrude into a wall 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 projects from the lower end of the middle case 39 facing the first drive transmission chamber 22, and both ends of the shaft 52 are provided with 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 and a driven rear wheel 58 is rotatably supported by a shaft. A driven front wheel 60 is rotatably provided on both front ends. A driven front wheel chamber 61 that is pivotally supported is formed.

On the other hand, the first cleaning body chamber 18 and the second cleaning body chamber 19 have a first rotating blade 63 as a rotating cleaning body.
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.

As shown in FIGS. 11 and 12, the first rotating blade 63 is a cloth blade as floor cleaning means as a cleaning body having a flexible outer peripheral surface and a raised surface 70 provided on one surface. A plurality of, for example, two double blade portions 72, which are scraping means as a cleaning body having a substantially Y-shaped cross section, 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. The length of the cloth blade 71 protruding from the mandrel 66 is longer than the length of the double blade 72 protruding from the mandrel 66, and when the surface to be cleaned is between the plates, only the cloth blade 71 is between the plates. And the flooring effect of floor polishing is obtained.

Further, the first rotating blade 63 and the second rotating 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 is formed in each first cleaning body chamber. A ground surface protrudes slightly downward from the openings on the lower surfaces of the cleaning body chamber 18 and the second cleaning body chamber 19, and is formed by the driven front wheels 60, 60 and the driven rear wheels 58, 58 only at the tip of the cloth blade portion 71. It is provided so as to protrude downward.

On the other hand, in the first drive transmission chamber 22, a drive conversion means 79 as a drive transmission means is provided. As shown in FIGS. 1, 2, 3 and 6, the drive conversion means 79 is provided with an axial direction in a box 80 disposed at the end of the first drive transmission chamber 22. A substantially rod-shaped first shaft 81 extending vertically is rotatably supported. At the lower end of the first shaft 81, a first pulley 83, over which a first endless belt 82a serving as a drive transmission means is stretched by the air turbine pulley 56 of the air turbine 37, is provided with a first drive transmission. A first bevel gear 84a is provided at the upper end thereof.

Further, in the box 80, a second shaft 85 and a third shaft 86, each having a substantially rod shape, are disposed so as to be rotatable vertically substantially in parallel with the case body 15 in the horizontal direction.
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 wrapped at an angle, and the third pulley 89 of the third shaft 86 is transmitted by the pulley 75 of the second rotary blade 64 to the third pulley 89. A third endless belt 82c as a means is stretched in a substantially horizontal direction.

As shown in FIG. 6, the center of the second shaft 85 is closer to the second rotating blade 64 than the intermediate position between the first rotating blade 63 and the second rotating blade 64, that is, upward. And a 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.

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 main body 11 is connected to a vacuum cleaner main body (not shown) via an extension pipe and a hose,
The hose is pushed forward while gripping the end of the hose on the extension pipe side, and the suction port body 11 is moved back and forth while making contact with the floor surface to be cleaned.

Then, by the suction force of the main body of the vacuum cleaner, the air is suctioned from the suction port 44 and also 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, particularly a long carpet, the first suction port 20 facing the floor surface is closed. Therefore, the negative pressure on the lower surface of the suction port main body 11 when the floor surface is a carpet or the like is larger than the negative pressure on the lower surface of the suction port main body 11 when the floor surface is between plates, and at this time, the suction port 44 Increases the intake air amount.

The air taken in from the intake port 44 is rectified and flows through the trumpet-shaped intake supply air passage 43a having a gradually decreasing cross-sectional area to reach the turbine chamber 38, where the air is swirled. The air turbine 37 rotates at a speed proportional to the amount of intake air. This rotational driving force is transmitted to the drive converting means 79 via the first endless belt 82a, and the rotational driving of the vertical direction is converted into two rotational driving forces of the horizontal direction by the driving converting means 79. After the conversion, the first rotating blade 63 and the second rotating 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. The first rotating blade 63 and the second rotating blade 64 rotate to scrape dust 90 from the floor surface, and the scraped dust 90 located in the first cleaning body chamber 18 passes through the communicating 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 flowing into the turbine chamber 38 is supplied from the communication hole 45 to the first suction chamber constituting the suction air passage 34.
It flows from 21 to the communication pipe 32.

Since the first suction port 20 is located on the spiral direction side of the first rotary blade 63, as shown in FIG. 13, the dust 90 in the first cleaning body chamber 18 reduces the suction force. The direction of suction 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 are the same direction, so that the dust 90 scraped off from the floor surface has a suction force. The first suction port 20 is smoothly passed through the communication air passage 28 by the cloth blade portion 71 and the double blade portion 72.
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 or the like, 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 space between the plates up to the wall.
Raise 90 so that it sweeps up, and flooring between the boards to the wall.

Incidentally, the intake port 44 has a smaller opening area than the first suction port 20 and the second suction port 23, and the air turbine 37 serving as an air path resistance is located in the intake air path 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 due to movement of furniture or the like, the lower surface of the suction port main body 11 separates from the floor surface, or the first suction port 20 and the second suction port 23 may be large. When the object is sucked and closed, the first rotating blade 63
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 to the atmospheric pressure in order to remove the lint and hair when the second rotating blade 64 is entangled with the second rotation blade 64. Reduce to near negative pressure. Due to the reduction of the negative pressure on the lower surface of the suction port main body 11, the suction performance from the first suction port 20 and the second suction port 23 having a large opening area and small airflow resistance is easier to suck than the suction from the suction port 44. So the first
Negative pressure of the suction port 20 and the second suction port 23 of the
The negative pressure in the suction chamber 21 is also reduced to a negative pressure close to the atmospheric pressure.
And the communication hole 45 is opened facing the first suction port 20,
An intake air passage 43 from the turbine chamber 38 to the communication pipe 32 has a communication hole.
In order to join the suction air passage 34 from 45 and communicate with the communication pipe 32,
The negative pressure of the communication hole 45 is also reduced to a negative pressure close to the atmospheric pressure. For this reason, the ratio between the suction amount from the first suction port 20 and the second suction port 23 and the suction amount from the suction port 44 is determined by the suction amount from the first suction port 20 and the second suction port 23. Increases, and the amount of suction from the intake port 44 is greatly reduced.
The rotation speed is greatly reduced or stopped, and the rotation speeds of the first rotating blade 63 and the second rotating blade 64 are also greatly reduced or stopped.

Then, the first rotating blade 63 and the second rotating 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. In the case of assembling, the opposite operation is performed.

According to the above embodiment, the communication hole 45 opened downstream of the turbine chamber 38 of the intake air passage 43 and communicating with the communication pipe 32 faces the first suction port 20 and faces the communication pipe 32. Since the opening is formed at a position where the air does not flow, it communicates with the suction air passage 34 from the first suction port 20 where a negative pressure is secured on the floor surface during cleaning, so that the negative pressure of the communication hole 45 is secured and the The air turbine, which is rotatably provided in the intake air path, is rotated efficiently by the intake air flow, and the rotating cleaning body rotates to remove dust from the surface to be cleaned.
90 can be scraped out and efficiently sucked from the first suction port 20 and the second suction port 23, and the case
When the lower surface of the case body 15 is separated from the floor surface by a predetermined distance by lifting or the like, the first suction port 20 and the second suction port 23 on the lower surface of the case body 15 are opened, and The intake air amount is greatly reduced, the rotation of the air turbine 37 is stopped or greatly reduced, and the rotation of each of the rotary blades 63 and 64 is stopped or greatly reduced.
Act as leaks.

Therefore, the scraped-out dust 90 can be easily sucked in from the first suction port 20 and the second suction port 23 in which a negative pressure is secured, and can be efficiently cleaned, and the first suction port can be efficiently cleaned.
When the suction port main body 11 is lifted to the second suction port 20 and the second suction port 23, the rotation of the air turbine 37 is reduced and the first rotating blade
A function as a leak port for reducing or stopping the rotation of the 63 and the second rotary blade 64 is also provided, so that both functions as a suction port for sucking in the dust 90 with a simple structure are obtained, and furthermore, the leak port is opened and closed. No opening / closing means or the like is required, the rotation of the first rotating blade 63 and the second rotating blade 64 can be easily reduced with a simple structure, and the size and weight can be easily reduced. 2
The wind noise caused by the rotation of the rotating blade 64 can be reduced.

Further, the second suction port 23 is formed on the downstream side of the suction air path from the first suction port 20 where the communication hole 45 of the intake air path 43 opens, and the second suction port 23 is formed as an opening. As a result, both remarkably improved cleaning performance and reduced or stopped rotation of the first rotating blade 63 and the second rotating blade 64 can be easily obtained.

The intake air passage 43 having the turbine chamber 38
The communication hole 45 faces the first suction port 20, does not face the communication pipe 32, does not face the communication pipe, and the suction airflow from the first suction port 20 does not flow back into the turbine chamber 38. The dust does not flow into the turbine chamber 38, so that the rotation of the air turbine 37 can be prevented from lowering due to the adhesion of the dust to the air turbine 37, the air turbine can be rotated efficiently, and the cleanability can be improved.

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. For this reason, in the case of between the plates, the suction amount from the suction port 44 decreases, and the rotation of the first rotating blade 63 and the second rotating blade 64 decreases. In the case of a carpet, the suction rate from the suction port 44 decreases. And the rotation of the first rotating blade 63 and the second rotating blade 64 is increased, so that a separate floor surface detecting means is not necessary, and the first rotating blade 63 has a simple structure according to the floor surface.
The rotation of the 63 and the second rotating blades 64 can be varied, so that the cleaning workability and the cleaning efficiency can be further improved.

Since the communicating air passage 28 has a concave groove shape,
The dust 90 can be prevented from being caught as compared with the case where the dust 90 is formed in a tubular shape with a tubular object or the like, and maintenance management such as removal of the dust 90 can be facilitated. In addition, 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.

The first rotating blade 63 and the second rotating blade 64 having a spiral shape are rotated clockwise inward in the opposite direction in which the spiral direction is the opposite direction. The first suction port 20 is opened on the spiral direction side in the rotated state, and the first cleaning body chamber is opened.
18 and the second cleaning body chamber 19 are communicated with each other through the communication recess 27 provided on the spiral direction side of the second rotary blade 64 opposite to the first suction port 20, so that the suction of the first suction port 20 is performed. The direction of suction by the force and the direction guided by the cloth blade portion 71 and the double blade portion 72 of the first rotating blade 63 are the same direction, and the dust 90 scraped from the floor surface is attracted by the suction force and the cloth blade. The portion 71 and the double blade portion 72 smoothly suck the air into the first suction port 20 via 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 communicating recess 27 is formed in a groove shape, the dust 90 is not caught and the dust 90 is removed, as in the case of the communication air passage 28, as compared with the case where the communicating recess 27 is formed in a tubular shape by a tubular object or the like. Easy maintenance and 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 shaft 52 of the scroll flat type air turbine 37 which can obtain a large torque is positioned between the first cleaning body chamber 18 and the second cleaning body chamber 19 in the axial direction along the vertical direction. The second bearing 49 that supports the shaft 52 is disposed between the first cleaning body chamber 18 and the second cleaning body chamber 19 below the upper ends of the first rotating blade 63 and the second rotating blade 64. , The air turbine 37 is positioned so as to overlap the first cleaning body chamber 18 and the second cleaning body chamber 19, so that a plurality of, for example, two first cleaning chambers are provided to improve the cleaning performance. Although the large torque required to rotationally drive the rotating blade 63 and the second rotating blade 64 can be obtained, the space before and after in the traveling direction for disposing the air turbine 37 and the bearings The space in the up and down direction for installing the second bearing 49 The size can be reduced and the size can be reduced. Since the air turbine 37 has a rectifying plate 54 that expands toward one end, the first bearing 47 that is a bearing uses the space on the diverging side of the rectifying plate 54.
Can be arranged, and the size can be further reduced.

Further, the first suction port 20 is deviated from substantially the center to one end side and opened, and the first suction chamber 21 communicating with the second suction chamber 24 facing the communication pipe 32 is formed. The middle case 39 formed above and housing the air turbine 37 is
, 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.

On the other hand, the same number of dusts as the cloth blade portion 71 serving as 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 blade portion 67 of the second rotary blade 64 are provided. Since the double blade portion 72 serving as a scraping means is provided so as to form the plate portion 68 having a scraping effect, the first suction port 20 communicating with the first cleaning body chamber located on the front side in the traveling direction is provided. , A second communicating with the second cleaning body chamber located on the rear side
Although the distance from the communication pipe to the suction port 23 is longer and the suction force is relatively weak due to air path resistance or the like, the first rotating blade 63 in the front first cleaning body chamber 18 is As many double blades as the second rotating blades in the second cleaning body chamber 19
In addition to the same scraping by the plate 68 of the 72, the dust is also scraped out by the cloth blade, and the cleaning ability from the first suction port 20 and the second suction port 23 is increased due to the relatively increased dust scraping ability. The abilities are substantially the same, and the cleaning performance can be easily improved.

Further, a flooring effect can be obtained up to the wall, dust can be scraped out to the wall, and the wall can be cleaned without switching separately according to the state of the floor regardless of the type of floor.

Further, the scraping effect of the blade portion 67, which is reduced by providing the cloth blade portion 71 on the first rotating blade 63, is compensated for by providing the double blade portion 72, and the first suction port 20 and the second suction port are provided. Since the cleaning ability from the suction port 23 is substantially the same, the sweeping effect when the suction port body 11 advances and retreats can be made substantially equal, and the cleaning efficiency can be further improved.

Further, since the outer diameter of the first rotating blade 63 located on the front side is smaller than the outer diameter of the second rotating blade 64, the first rotating blade 63 is arranged to the forefront in the case body 15. In addition to this, the distance between the position where the first rotating blade 63 contacts the floor surface and the edge of the wall can be shortened, and the edge of the wall can be cleaned.

Further, since the outer diameter of the first rotary blade 63 is smaller than the outer diameter of the second rotary blade 64, the load on the floor surface of the first rotary blade 63 is reduced. Even if the rear side of the suction port main body 11 is strongly pressed against the floor surface through the communication pipe 32 when the 11 advances, the driving force is transmitted to the second rotary blade 64 on the rear side, so that the second rotary blade
Cleaning by 64 can be performed reliably.

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.

Further, the drive transmission means for transmitting the drive of the air turbine 37 to the first rotary blade 63 and the second rotary blade 64, that is, the first endless belt 82a and the drive conversion means 79 are provided in the first cleaning body chamber. 18 and the second cleaning room
19, it is located on the opposite side to the suction air passage 34 and is isolated, so that the vertical dimension can be reduced and further downsizing can be achieved, and the drive conversion means 79 is separated from the suction air passage 34 and separated. Through the second endless belt 82b and the third endless belt 82
At c, the first rotating blade 63 and the second rotating blade
The first endless belt 82a, the drive conversion means 79, the second endless belt 82b, and the third endless belt, which are drive transmission means, are transmitted by the dust 90 sucked in to transmit the drive to the end of the endless belt 64.
82c is not contaminated and maintenance is easy.

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 the intake supply air 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 intake port 44 is formed at a position which is substantially vertical to the case body 15, it is possible to prevent the fine dust 90 in the air from being deposited on the intake port body 11 to block the intake port 44. Thus, a reduction in intake efficiency can be suppressed, and the air turbine 37 can be rotated efficiently.

Further, the air turbine 37 in the turbine chamber 38 is moved from the intake port 44 which is not blocked by walls, furniture, curtains or the like.
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-described embodiment, an auxiliary communication hole is provided at a position facing the communication pipe 32 of the middle case 39 so as to increase the amount of intake air and increase the torque of the air turbine 37. It is also possible to assist the intake. In this case, the opening area of the auxiliary communication hole is
The main flow of the intake airflow is smaller than the opening area of 45
45 to prevent the airflow from flowing from the communication hole 45 to the communication pipe 32 through the inside of the turbine chamber 38 and from the auxiliary communication hole to prevent rotation of the air turbine 37 due to the backflow and to prevent the communication hole 45 from flowing. It is necessary to prevent dust from entering the turbine chamber 38 due to the flow of dust-containing air from above.

In addition to the canister type vacuum cleaner, the suction port body 11 is an upright type in which the suction port body 11 is formed directly on the lower surface of the vacuum cleaner body, and the vacuum cleaner body and the suction port body 11 are integrated. It can also be applied to a self-propelled vacuum cleaner and the like.

The opening degree is continuously adjusted in the middle of the intake air passage 43 so that the first rotating blade 63 and the second rotating blade
A valve body, a shutter, and the like can be separately provided so that the rotation speed of the 64 can be varied.

On the other hand, as the rotary cleaning body, in addition to the first rotary blade 63 and the second rotary blade 64, any of a rotary brush having raised walls in a wall shape, a rotary brush having only a cloth blade portion, and the like can be used. A thing may be used.

Although two rotary cleaning bodies are provided and described, the same effect can be obtained by providing one or more rotary cleaning bodies.

[0066]

According to the first aspect of the present invention, since the communication hole of the suction air path is provided not to the communication pipe but to the suction port, the suction port of the vacuum cleaner can be connected at the time of cleaning. The pressure is secured, and the rotating cleaning body rotates together with the air turbine by the intake airflow from the intake port, efficiently scraping dust from the surface to be cleaned, sucking it in from the suction port, and lifting the case body to clean the lower surface of the case body. When a predetermined distance is left from the surface, by opening the suction port on the lower surface of the case body, the negative pressure of the communication hole that faces the suction port that has reduced the negative pressure by opening and does not face the communication pipe is reduced. The amount of intake air from the intake port is greatly reduced, the rotation of the air turbine can be stopped or greatly reduced, and the rotation of the rotary cleaning body can be easily stopped or greatly reduced with a simple configuration, and the suction from the suction port into the turbine chamber I dust does not flow, it is possible to prevent deterioration of rotation efficiency of the air turbine by adhesion of dust.

According to the suction port body of the vacuum cleaner according to the second aspect, since the communication hole of the suction air path is provided to face the suction port without the suction airflow flowing from the suction port, the suction port is provided at the time of cleaning. The negative pressure is ensured, and the rotating cleaning body rotates together with the air turbine by the intake airflow from the intake port, effectively scraping out dust from the surface to be cleaned, sucking in the dust through the suction port, and lifting the case body to lower the bottom of the case body. When a predetermined distance from the surface to be cleaned is reached, the suction port on the lower surface of the case body is opened, so that the suction airflow flowing from the suction port to the communication pipe is opened, and the communication hole facing the suction port having a reduced negative pressure. From the inlet, the negative pressure in the communication hole is reduced, the amount of intake air from the intake port is greatly reduced, the rotation of the air turbine can be stopped or greatly reduced, and the rotation of the rotary cleaning body can be easily stopped with a simple configuration Or It is possible to listen reduced, since the suction airflow containing dust from the suction port into the turbine chamber does not flow, it is possible to prevent deterioration of rotational efficiency due to dust adhering to the air turbine.

[Brief description of the drawings]

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

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

FIG. 3 is a plan view partially cut away from the above.

FIG. 4 is a bottom view of the same.

FIG. 5 is a rear view of the same.

FIG. 6 is a side sectional view showing a relationship between the drive conversion unit and a first rotary blade and a second rotary blade.

FIG. 7 is a bottom view showing the middle case;

FIG. 8 is a sectional view showing the air turbine.

FIG. 9 is a bottom view of the same.

FIG. 10 is a plan view of the same.

FIG. 11 is a perspective view showing the first rotating blade of the above.

FIG. 12 is a sectional view of the same.

FIG. 13 is an explanatory diagram illustrating a situation in which dust is moved by rotation of the rotary blade.

[Explanation of symbols]

 11 Suction port body 15 Case body 20 First suction port 23 Second suction port 32 Communication pipe 37 Air turbine 38 Turbine chamber 43 Intake air path 44 Intake port 45 Communication hole 63 First rotating blade as rotating cleaning body 64 Second rotating blade as rotating cleaning body

Claims (2)

[Claims] 1. A case body having a suction port opened on a lower surface opposite to a surface to be cleaned and a suction port opened separately from the suction port, and a communication pipe provided in the case body and communicating with the suction port. And an intake air passage provided in the case body, one end of which communicates with the intake port and the other end of which communicates with the communication pipe and opens a communication hole facing the suction port without facing the communication pipe. A turbine chamber provided in the intake air passage and rotatably accommodating an air turbine rotated by the intake air flow; and a rotation rotatably disposed facing the lower surface of the case body and rotated by the rotation of the air turbine. A suction port body for a vacuum cleaner, comprising a cleaning body. 2. A case body having a suction port opened on a lower surface facing a surface to be cleaned and a suction port opened separately from the suction port, and a communication pipe provided in the case body and communicating with the suction port. And a communication hole provided in the case body, one end of which communicates with the suction port and the other end of which communicates with the communication pipe and which faces the suction port without suction airflow flowing from the suction port. An intake air passage, a turbine chamber provided in the intake air passage and rotatably accommodating an air turbine rotated by the intake air flow, and rotatably disposed facing the lower surface of the case body and rotating the air turbine. A rotary cleaning body that rotates according to the following.