JP3381890B2 - Vacuum cleaner suction body - Google Patents

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 in which a rotary cleaning member is rotationally driven by a driving means.

[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. is doing.

[0004]

However, in the suction port body of the conventional electric vacuum cleaner described in the above-mentioned US Pat. No. 2,904,816, since there is only one rotary cleaning body, for example , thread dust entwined with a carpet or the like. It is not possible to fully scrape out hair and hair, 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.

By the way, at the time of advancing the suction port body, a hose connected to the communication pipe provided at the rear end of the suction port body in the traveling direction is pushed forward so as to move forward. The movement causes the rear part of the suction port body to be pressed against the surface to be cleaned. On the other hand, in the case of retracting the suction port body, since the hose is operated so as to be pulled, a force acts in the direction in which the suction port body is lifted. For this reason, when the suction port body moves forward, the resistance received from the floor surface, which is the load of the rear rotary cleaning body, increases and it becomes difficult to rotate.

Further, when two rotary cleaning bodies are provided, the front rotary cleaning body is rotated in the forward direction with respect to the forward direction and the rear rotary cleaning body is used in order to suck dust efficiently from the front and rear. It is conceivable to rotate them in the opposite direction to the forward direction, that is, to rotate them inward with respect to each other, but the above-mentioned rear rotary cleaning body pressed against the surface to be cleaned during the forward direction is opposite to the forward direction. Therefore, the rotation of the rear rotary cleaning body is reduced.

Therefore, even if a plurality of rotary cleaning bodies are provided, there is a problem that the dust cleaning effect of the rear rotary cleaning body is lowered when the suction port body is moved forward.

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 that improves the cleaning performance during forward movement and improves the cleaning efficiency.

[0011]

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 at the rear of the running direction of the cleaning body chamber, a plurality of rotary cleaning bodies rotatably arranged in the cleaning body chamber located in the front-back direction of the running direction, and these rotary cleanings. and drive means for the body simultaneously rotationally driven, the rotary cleaning body rearward in the travel direction is in shall be rotated at a rotational torque greater than the rotation torque of the front of the rotary cleaning body, a plurality of rotary cleaning body Driven by the driving means at the same time
With respect to what is, since the rotational torque of the rotary cleaning body rearward in the travel direction to be pressed against the surface being cleaned at the communicating pipe during forward and greater than the rotational torque of the front rotary cleaning body, the rotational torque of the front of the rotating cleaning body Since it is small, the torque from the drive means is efficiently transmitted to the rotary cleaning member on the rear side, and the cleaning property is improved.

The suction inlet of the electric vacuum cleaner according to claim 2 is
Cleaning body that opens downward on the lower surface facing the surface to be cleaned
A case body having a chamber and a rear part of the case body in the traveling direction
And a communication pipe that is provided in the communication chamber and communicates with the cleaning body chamber,
It is located in the front-back direction and is rotatably arranged in the cleaning body chamber.
Multiple rotating cleaning bodies and the front
Rotate the rotary cleaning body in the forward direction with respect to the forward direction.
At the same timeMove the rotary cleaning body located on the rear side in the forward direction
Drive means for rotating in the opposite direction to
The rotary cleaning body on the rear side in the row direction is the rotary cleaning body on the front side.
Body rotationtorqueGreater rotationtorqueDriven byDoneRu
ThingsRotating multiple rotary cleaning bodies simultaneously with drive means
As for what to move,Rotate in the opposite direction to the forward direction
Rotation of the rotating cleaning body behind the driven directiontorque
On the front side which is driven to rotate in the forward direction with respect to the forward direction.
Rotating the cleaning bodytorqueRotation on the front side because it was bigger
Cleaning body rotationtorqueIs small, the rear rotary cleaning body
The torque from the drive means is efficiently transmitted to the
Dust is efficiently scratched from the surface to be cleaned by the rotating cleaning unit on the rear side.
Cleaned up by being taken out.

[0013]

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. The suction port main body 11 includes a lower main body case 12 made of synthetic resin such as acrylonitrile-butadiene-styrene resin and the like. 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-shaped first cleaning member which is horizontally long in the front side, which is the traveling direction side, and is horizontally long 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 main body case 12 is partitioned by the rib portion 17 from one end side from substantially the center between the first cleaning body chamber 18 and the second cleaning body chamber 19 and has a function as a leak port on the lower surface. A first suction chamber 21 that opens the first suction port 20, a first drive transmission chamber 22 that is partitioned from substantially the center to the other end side, and a second cleaning body chamber that is partitioned at the rear substantially center
A second suction chamber 24 that opens a second suction port 23 that also has a function as a leak port in the upper surface of 19 and communicates 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 which is divided into The first
The opening area of the suction port 20 is 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 first suction port 20 than the first suction port 20 because the distance from the communication pipe 32 is shorter than that of 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 in which a flat air turbine 37 as a driving means is rotatably accommodated. The middle case 39 is formed by a substantially funnel-shaped lower case 40 having a large diameter in the upper part and a small diameter in the lower part, and an upper case 41 closing the upper part of the lower case 40.

Further, the middle case 39 is provided 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 into the turbine chamber 38. The intake air supply passage 43a is formed in a scroll-like communication with the turbine chamber 38 such 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 main body case 13 constitutes 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 air supply passage 43a located on the front side of the case body 15. And this intake air supply passage 43a
One end of the trumpet-shaped opening is communicated so as to face 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 at one side of the communication pipe 32.

Further, a communication hole 45 is formed on the surface of the middle case 39 facing the second suction chamber 24, and the intake port 44 extends 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 in 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 in the substantially center of the upper surface of 40.

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

Further, 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.
It is axially supported by the 47 and the second bearing 49 in a substantially vertical direction, and is rotatably supported in the turbine chamber 38.
Further, the middle case 39 is housed and fixed in the case body 15 such that the second bearing 49 is located substantially in 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 on 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 rotating blade 63 as a rotating cleaning body is provided.
The second rotary blade 64 is rotatably arranged. The second rotary blade 64 has a mandrel 66 that is provided with a spiral groove portion 65 in the circumferential direction in the clockwise direction on the peripheral surface of the mandrel 66, for example.
A plurality of, for example, four blade portions 67, which are flexible, for example, as a cleaning body made of soft vinyl chloride as a cleaning body, are engaged with the groove portion 65 of the spiral shape so as to project in a wall shape on the outer peripheral surface. There is. The blade portion 67 is configured by forming a thick pedestal portion 69 in which one longitudinal edge of the elongated flat plate portion 68 engages with the groove portion 65 of the mandrel 66.

Further, the first rotary blade 63 is a floor polishing means as a cleaning body having a blade portion 67 similar to the second rotary blade 64 on the outer peripheral surface and a flexible and brushed 70 provided on one surface. A certain number of cloth blade parts 71 are spirally formed, for example, 2
They are provided alternately one by one. The cloth blade portion 71 is made of, for example, a slender plate-like raised cloth 73 made of polyester and provided with raised hairs 70 on one surface, and a pedestal portion 69 made of soft vinyl chloride is formed thickly on one side edge in the longitudinal direction. Has been done.

The length of the cloth blade portion 71 protruding from the mandrel 66 is longer than the length of the blade portion 67 protruding from the mandrel 66 , and when the surface to be cleaned is between the plates , only the cloth blade portion 71. The flooring effect of being a floor polish is obtained by contacting between the boards. The first rotating blade 63 is
Instead of the pair of blade portions 67 of the second rotary blade 64, a pair of cloth blade portions 71 having less friction with the floor surface and less resistance than the blade portions 67 is provided, and therefore the floor during the rotation is The load from the floor caused by the contact with the surface is smaller in the first rotating blade 63 than in the second rotating blade 64.

Further, the first rotary blade 63 and the second rotary blade 63
Pulleys 75 are integrally provided on the mandrel 66 at one end of the rotating blade 64. The first rotary blade 63 and the second rotary blade 64 are such that the 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 rotatably supported by being engaged with bearings 77, 77 provided on the case body 15, respectively.

The first rotary blade 63 and the second rotary blade 64 are formed so 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 by 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 converting means 79 which is a drive transmitting 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 rotatably arranged substantially in parallel vertically along the lateral direction of the case body 15.
The second shaft 85 has a first shaft 81 at one end.
A second bevel gear 84b that engages with the first bevel gear 84a of
A second pulley 87 facing the second drive transmission chamber 25 is provided at the other end, and a first gear 88a is provided at one end side from the intermediate portion.
The second shaft 85 is attached to one end of the third shaft 86.
A second gear 88b that engages the first gear 88a of
At the other end, a third pulley 89 facing the second drive transmission chamber 25
Is provided. The second gear 88b has more teeth than the first gear 88a, and the rotation speed of the third shaft 86 is slower than that of the second shaft 85, so that the rotation driving load of the second shaft 85 is smaller than that of the second shaft 85. That is, the rotation torque is increased.

The second pulley of the second shaft 85
A second endless belt 82b, which is a drive transmission means, is slanted around 87 with the pulley 75 of the first rotary blade 63, and a third pulley 89 of the third shaft 86 is provided with a second endless belt 82b. An endless belt 82c, which is a third drive transmission means, is spanned substantially horizontally by the pulley 75 of the second rotary blade 64. The torque, which is the rotational drive load of the second rotary blade 64, becomes larger than that of the first rotary blade 63 due to the bridging of the second endless belt 82b and the third endless belt 82c.

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
The shaft 85 is positioned such that the distance between the shaft 85 and the first rotating blade 63 that is slanted over the shaft 85 is long. Also,
The third shaft 86 is positioned in a substantially horizontal direction with respect to the second rotary blade 64 that is bridged substantially horizontally with the third shaft 86, and between the third shaft 86 and the second rotary blade 64. Position them so that the distance between them becomes shorter.

The rotation of the air turbine 37 causes the first
The first shaft 81 rotates through the endless belt 82a of
By this rotation, the first bevel gear 84a and the second bevel gear 84b
The second shaft 85 rotates via. The rotation of the second shaft 85 causes the first gear 88a and the second gear 88b to mesh with each other, so that the third shaft 86 rotates in the opposite direction to the second shaft 85, and the second endless belt 82
The first rotating blade 63 via the b is rotated Then simultaneously in the forward direction with respect to the forward direction of the suction port body 11, a second rotating blade 64, rotating with respect to the forward direction of the suction port body 11, That is, they rotate inward with respect to each other.
It should be noted that the first rotary blade 63 is the brushed portion of the cloth blade portion 71.
It is designed to rotate toward the 70 side.

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 electric 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 port body
Since 11 is placed on the floor, the first suction port 20
Is a first rotary blade 63 and a second rotary blade 64.
Since it is located between them, the first rotary blade 63 and the second rotary blade 64 are sealed with the floor surface, and the negative pressure on the lower surface of the suction port body 11 increases.

By the way, since the second suction port 23, which is closer to the first suction port 20 than the communication pipe 32, is opened in the second cleaning body chamber 19, the second rotary blade 64 makes the air passage. Since the resistance is increased and the opening area is smaller than the opening area of the first suction port 20, the suction force from the first suction port 20 and the suction force from the second suction port 23 are approximately 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 of the same degree is equal to the negative pressure of the lower surface of the suction port body 11 facing the floor surface. Increased intake
This is the rate at which the amount of intake air from 44 increases.

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 becomes 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 amount of increases.

Further, the air sucked from the intake port 44 flows into the turbine chamber 38 in a spiral shape while being rectified through the trumpet-shaped intake air supply passage 43a whose cross-sectional area is gradually reduced, and is caused by the spiral suction air flow. 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 rotational drive about the vertical direction is converted into two rotational drive force about the horizontal direction by the drive converting means 79. The first rotating blade 63 and the second rotating blade 64, which are converted, are simultaneously rotated through the second endless belt 82b and the third endless belt 82c at a speed proportional to the amount of intake air in opposite directions to each other. The blade 64 rotates with a larger torque than the first rotating blade 63.

Then, the suction port body 11 by pushing the hose
When advancing, the suction port body 11 is pressed against the floor surface. In this state, due to the wedge effect, the load from the floor surface due to the contact of the second rotary blade 64 with the floor surface becomes larger than the load from the floor surface of the first rotary blade 63, but the second rotary blade 63 Since the rotational torque, which is the rotational drive load of the blade 64, is set to be large, the second rotary blade 64, which is reversely rotated with respect to the forward movement, efficiently scrapes dust from the floor surface.

Further, when the suction port main body 11 is retracted, the hose is pulled, so that the suction port main body 11 is subjected to the force of lifting, so that the floor of the first rotary blade 63 and the second rotary blade 64 is The load from the surface is reduced, and the load is almost the same. Then, dust is efficiently scraped off the floor surface by the first rotary blade 63 that rotates in the opposite direction to the backward movement.

Then, the dust that has been scraped out and is located in the first cleaning body chamber 18 passes through the communication air passage 28 and the first suction port 20.
The dust sucked from the second cleaning body chamber 19 is sucked from the second suction port 23 as it is. Also,
The suction airflow that has flowed into the turbine chamber 38 flows from the second suction chamber 24 to the communication pipe 32 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 rotates in the direction of being sucked by the suction force. In the spiral direction in the state, that is, the direction of being sucked by the suction force and the direction of being guided by the cloth blade portion 71 and the blade portion 67 are the same direction, so the dust scraped from the floor surface is attracted by the suction force and the cloth. Blade part 71 and blade part
At 67, the air is smoothly sucked into the first suction port 20 through the communication air passage 28. Further, since the second suction port 23 is opened substantially in the center of the second cleaning body chamber 19 and the second rotary blade 64 is the reverse rotation in which the spiral direction is opposite to that of the first rotary blade 63, Since the direction of being sucked by the suction force and the direction of being guided by the blade portion 67 are opposite to each other, the second suction port 23
Part of the dust 90 that is not sucked in from the second suction port 23 is moved by the blade portion 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. Is introduced into the first cleaning body chamber 18 through a communication recess 27 that connects the second cleaning body chamber 19 and the first cleaning body chamber 18 to each other, and a communication air passage
It is sucked into the first suction port 20 via 28.

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 is swept up to the wall. While scraping it up to the floor, flooring is done between the boards.

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 an air passage resistance is located in the intake air passage 43,
The suction force from the first suction port 20 and the second suction port 23 decreases, and the suction force from the first suction port 20 and the second suction port 23 decreases. And the first
The rotary drive of the rotary blade 63 and the second rotary blade 64 makes it easier to inhale because dust is scraped off.
There is almost no leftover due to a decrease in 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 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.

Then, the first rotary blade 63 and the second rotary blade 63
When removing the first rotary blade 63 and the second rotary blade 64 in order to remove thread dust, hair, and the like entangled with the rotary blade 64 of the
29 is removed and the shaft 76 on the side where the pulley 75 is not provided
With the fulcrum as the fulcrum, the pulley 75 side is moved downward to remove the shaft portion 76 on the pulley 75 side from the bearing 77, and the second endless belt 82b
Also, it can be removed by removing the pulley 75 from the third endless belt 82c and the shaft portion 76, which is the fulcrum, from the bearing 77. The reverse operation is carried out when assembling.

According to the above-described embodiment, the rotational torque, which is the rotational drive load of the second rotary blade 64 on the rear side in the traveling direction, which is rotationally driven in the direction opposite to the forward direction, is changed with respect to the forward direction. Since the rotational torque of the first rotating blade 63 on the front side, which is rotationally driven in the forward direction, is set to be larger than that of the first rotating blade 63 on the front side, the rotational torque of the first rotating blade 63 on the front side is pressed against the floor surface during forward movement. Although the load of the second rotating blade 64 becomes large, the rotating torque of the first rotating blade 63 is made small and the rotating torque from the air turbine 37 is efficiently transmitted to the second rotating blade 64 to make the second rotating blade 64 Since the rotational torque of 64 is increased, dust can be efficiently scraped off the floor surface by the second rotating blade 64 that rotates in the opposite direction to the forward movement. In addition, since the load from the floor surface of the first rotary blade 63 and the second rotary blade 64 is reduced by the force pulled up at the time of retreating and becomes approximately the same,
Even with the first rotating blade 63 having a rotating torque smaller than that of the rotating blade 64, dust can be sufficiently scraped out by the first rotating blade 63 which is reversely rotated with respect to the backward movement.

For this reason, the torque from the air turbine 37 can be efficiently applied to the load of the first rotating blade in response to the load during cleaning.
It can be efficiently transmitted to the 63 and the second rotary blade 64, and the cleaning property can be improved.

Furthermore, the first rotary blade 63 located on the front side in the traveling direction has a large friction from the floor surface and a small load from the floor surface. Since it is provided instead of the blade portion 67 for scraping,
With a simple structure, the rotation torque of the first rotary blade 63 is
The rotation torque can be made smaller than the rotation torque of the rotary blade 64 , and the floor can be polished up to the wall, so that the cleaning performance can be improved.

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 frontmost portion 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 with 64 can be done reliably.

Further, the shaft body 52 of the scroll flat type air turbine 37 capable of obtaining a large torque is positioned between the first cleaning body chamber 18 and the second cleaning body chamber 19 in the axial direction in the vertical direction. Since the second bearing 49 that pivotally supports the shaft body 52 is disposed between the first cleaning body chamber 18 and the second cleaning body chamber 19 below the upper ends of the rotary blades 63 and 64. ,
Since the air turbine 37 is positioned so as to overlap the first cleaning body chamber 18 and the second cleaning body chamber 19, a plurality of, for example, two rotary blades 63, 64 are rotationally driven to improve the cleaning performance. Space dimension before and after the traveling direction for arranging the air turbine 37 and a vertical space dimension for arranging the second bearing 49, which is a bearing, even though a large torque required for Can be reduced and downsizing can be achieved. 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 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 endless belt 82a, the drive converting means 79, the second endless belt 82b, and the third endless belt, which are the drive transmitting means, are drawn by the sucked dust. The belt 82c is not contaminated and maintenance is easy.

Further, the scroll deflection type air turbine 37
An intake air supply passage 43a for supplying a suction air flow in a spiral shape is located on the opposite side of the intake 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. Since the suction air passage 34 and the intake air supply air passage 43a do not overlap with each other, the size can be further reduced.

Then, the intake port 44 of the intake air supply passage 43a
Since the opening is formed in the rear portion where the communication pipe 32 is led out, the intake port 44 is not blocked by a wall, furniture, curtain, etc. during cleaning, the air turbine 37 can be efficiently rotated, and the communication pipe 32 can be rotated. The space for supporting can be effectively used to easily rectify and supply the spiral suction airflow to the turbine chamber 38, and the driving torque of the air turbine 37 can be further improved and downsized easily.

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.
To supply the suction air flow to the
43a is opened to the front side of the turbine chamber 38 and is formed in a trumpet shape having an interference function so as to be gradually narrowed from the intake port 44 so that they communicate with each other. The intake air supply passage 43a having a small area can rectify the intake airflow, and can reduce wind noise and the like of the air turbine 37, thereby reducing noise.

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 the dust 90 from the floor surface and efficiently inhale through the suction ports 20 and 23.
23 acts as a suction port for sucking dust 90, and case body 15
When the lower surface of the case body 15 is separated from the floor surface by a predetermined distance, for example, by lifting, the lower surface of the case body 15 is located in the intake air passage 43 on the downstream side of the air turbine 37 and the suction air passage 34 The first suction port 20 that opens and the second suction port 23 that directly opens are opened, the amount of intake air from the intake port 44 is greatly reduced, and the rotation of the air turbine 37 is stopped or greatly reduced. 64 rotations stopped or significantly reduced,
Each suction port 20, 23 acts as a leak port.

Therefore, the dust 90 scraped out can be easily sucked in efficiently from the first suction port 20 and the second suction port 23 where a negative pressure is ensured, 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, 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, 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. It opened Te
And because, readily suction from the first suction port 20 to the negative pressure the dust 90 scraped out is ensured. That is, while having a function as a leak port that lowers the rotation of the air turbine 37 when the suction port body 11 is lifted, both the function as a suction port that sucks in the dust 90 can be achieved with a simple configuration, and further leak action Can be increased.

Further, since the communication air passage 28 has a concave groove shape, it is possible to prevent dust from being caught and the like, and maintenance and management such as removal of dust is facilitated as compared with the case where the communication air passage 28 is formed in a tubular shape with a tubular object. it can. 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
Since the and are communicated with each other in the concave groove-shaped communication air passage 28, the closed state of the first suction port 20 and the communication air passage 28 differs depending on the type of surface to be cleaned, for example, between the plates, tatami mat, carpet, etc. The pressures are different, and 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 variable. Therefore, in the case of the space between the plates, the suction amount from the intake port 44 is reduced and the rotation of each rotary blade 63, 64 is reduced, and in the case of a carpet, the suction amount from the intake port 44 is increased and each rotary blade is increased. Since the rotation of 63, 64 increases, 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.

Furthermore, 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 rotating blades 63, 6 can be safely
4 rotations can be reduced.

Further, the spiral first rotating blade 63 and the second rotating blade 64 are rotated inward in the opposite direction of the spiral direction, and 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 force and the direction of being guided by the cloth blade portion 71 and the double blade portion 72 of the first rotating blade 63 are the same, and the dust scraped off the floor surface is attracted by the suction force and the cloth blade portion. 71 and the double blade portion 72 are smoothly sucked into the first suction port 20 through the communication air passage 28. In addition, the blade portion 67 of the second cleaning body chamber 19 has a second suction port.
The dust moved in the direction away from 23 is guided to the first cleaning body chamber 18 via the communication recess 27, and is sucked into the first suction port 20 from the communication air passage 28. Therefore, each cleaning body room 18,19
It is possible to prevent dust from remaining inside without being sucked in, improve the cleaning performance, reduce the contamination of the lower surface of the suction port body 11 with dust, and reduce the frequency of maintenance management.

Since the communication recess 27 has a groove shape, like the communication air passage 28, dust is not caught and maintenance management such as removal of dust is possible as compared with the case where the communication air passage 28 is formed in a tubular shape with a tubular object. Can be done easily. The communication recess 27 may also have a structure in which the first cleaning body chamber 18 and the second cleaning body chamber 19 are communicated with each other by a tubular object.

Further, the first suction chamber 21 is opened from the center so as to be offset from the center toward one end side, and the first suction chamber 21 which is adjacent to and communicates with the second suction chamber 24 facing the communication pipe 32 is formed. A middle case 39, which is formed above and houses the air turbine 37, is formed in the case body 15.
Since it is arranged substantially in the center, 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. , Further miniaturization can be achieved.

In addition, the second shaft 85 which slants the second endless belt 82b around the first rotating blade 63 and extends from the intermediate position between the first rotating blade 63 and the second rotating blade 64 The second rotary blade 64 is arranged at a position where the distance between the rotary blade 64 and the second rotary blade 64 becomes long, and the second rotary blade 64 has a third endless belt.
The third shaft 86 that bridges 82c in a substantially horizontal direction is
Since the first rotary blade 63 and the second rotary blade 64 are arranged at a position where the distance on the second rotary blade 64 side is shorter than the intermediate position between the first rotary blade 63 and the second rotary blade 64, Cleaning chamber by rotating
It is possible to prevent the first rotary blade 63 and the second rotary blade 64 from coming into contact with the opening edges of the lower surfaces of the 18 and the second cleaning body chambers 19 and becoming difficult to remove, and easily the first rotary blade 63.
And the second rotary blade 64 can be attached and detached.

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, it is possible to separately provide a valve element or a shutter in the middle of the intake air passage 43 so that the opening degree can be continuously adjusted and the rotational speeds of the rotary blades 63 and 64 can be varied.

On the other hand, a rotary blade is used as the rotary cleaning member.
In addition to 63 and 64, use is made of a brush having a wall-shaped blade portion branched into a Y-shaped cross section, a rotary brush, or a cloth blade portion alone. Good.

Further, the magnitude of the rotational drive load of the first rotary blade 63 and the second rotary blade 64 is determined by the drive conversion means.
The description has been made by changing the gear ratio of the first gear 88a and the second gear 88b of 79, and further providing the cloth blade portion 71 to the front side first rotating blade 63 so that the load from the floor surface becomes small. Either one can be used, and the same effect can be obtained by any other method.

[0078]

Effects of the Invention According to the suction mouth of the electric vacuum cleaner according to claim 1, drive simultaneously rotate a plurality of rotary cleaning body by the drive means
With respect to the moving object, the rotational torque of the rotary cleaning member on the rear side in the traveling direction, which is pressed against the surface to be cleaned by the communication pipe when moving forward, is made larger than the rotation torque of the rotary cleaning member on the front side.
Rotational torque of the front of the rotary cleaning body can be improved efficiently be transmitted cleaned of the torque from the driving means to the rotary cleaning body of the rear since small Kunar.

According to the suction port body of the electric vacuum cleaner of the second aspect, the plurality of rotary cleaning bodies are simultaneously driven to rotate by the drive means.
Regarding what is made, the rotational torque of the rotary cleaning body on the rear side in the traveling direction, which is rotationally driven in the opposite direction to the forward direction,
Due to larger than the rotational torque of the front rotary cleaning body which is driven to rotate in the forward direction to the forward direction, the torque from the driving means to the rotary cleaning body rear side from the rotational torque of the front of the rotating cleaning body is reduced It is possible to efficiently transmit, and dust can be efficiently scraped out from the surface to be cleaned by the rotary cleaning member on the rear side of the reverse rotation to improve the cleaning property .

[Brief description of drawings]

FIG. 1 is a partially cutaway plan view showing an embodiment of a suction port body 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 side sectional 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 same air turbine as above.

FIG. 8 is a bottom view of the same.

FIG. 9 is a plan view of the same.

[Explanation of reference numerals] 1 5 Case body 18 First cleaning body chamber 19 Second cleaning body chamber 32 Communication pipe 37 Air turbine 63 as drive means First rotary blade 64 as rotary cleaning body 64 Rotation cleaning body the second rotation blade

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) A47L 9/04

Claims (2)

(57) [Claims] 1. A case body having a cleaning body chamber opened downward on a lower surface facing the surface to be cleaned, and a communication pipe provided at a rear portion of the case body in a traveling direction and communicating with the cleaning body chamber. , A plurality of rotary cleaning bodies which are positioned in the front-rear direction of the traveling direction and are rotatably disposed in the cleaning body chamber, and a drive means for driving the rotary cleaning bodies to rotate at the same time . the rotary cleaning body, front the rotary cleaning body suction port body of rotationally driven at a rotational torque greater than the torque <br/> vacuum cleaner characterized by Rukoto of. 2. A case body having a cleaning body chamber opened downward on a lower surface facing the surface to be cleaned, and a communication pipe provided at a rear portion of the case body in a traveling direction and communicating with the cleaning body chamber. , A plurality of rotary cleaning bodies located in the cleaning body chamber rotatably in the front-rear direction of the traveling direction and the rotary cleaning body located on the front side of the traveling direction in the forward direction with respect to the forward direction at the same time Ru was driven, the rotary cleaning body located on the rear side and a driving means for rotationally driving in the opposite direction to the forward direction, the rotary cleaning body rearward in the travel direction, the front side the rotary cleaning of A suction port body of an electric vacuum cleaner, which is driven to rotate with a rotation torque larger than a rotation torque of the body.