JP3468401B2 - Electric vacuum cleaner - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vacuum cleaner which is levitated by exhaust air from an electric blower.

[0002]

2. Description of the Related Art Conventional vacuum cleaners of this type include, for example, Japanese Utility Model Application Laid-Open No. 51-99976 and Japanese Utility Model Application Laid-Open No. 51-9.
As described in Japanese Patent Publication No. 9977 and Japanese Utility Model Laid-Open No. 51-101065, cleaning for partitioning an electric blower chamber that houses an electric blower and a dust collecting chamber that opens a suction port for sucking dust on the negative pressure side of the electric blower chamber. At the bottom of the machine body, a cylindrical skirt that opens downward is provided,
An exhaust port is formed in the lower part of the electric blower chamber to open in the skirt portion and to exhaust the exhaust air from the electric blower. Then, the air pressure in the skirt increases due to the exhaust air exhausted by the drive of the electric blower, so that the cleaner main body placed on the surface to be cleaned emits exhaust air from between the lower end of the skirt and the surface to be cleaned. It is configured to float by being exhausted.

[0003]

However, in the above conventional vacuum cleaner, when the suction port body is connected via, for example, a hose and an extension pipe, and the suction port body is run on the surface to be cleaned for cleaning. In addition, it is difficult to move the vacuum cleaner body to a predetermined position when pulling the hose to move the vacuum cleaner body, and it is necessary to stop the moving vacuum cleaner body. Becomes complicated.

Therefore, for example, it is conceivable that the cleaner body having a suction opening on the lower surface thereof is provided with an operating body having a gripping portion of which one end is grasped, and the cleaning body is moved by operating the operating body. However, when cleaning while moving the cleaner body by pushing and pulling the operation body, the exhaust air from the skirt is uneven due to the pressing force applied to the cleaning body body via the operation body toward the surface to be cleaned. Leakage into the vacuum cleaner may prevent good floating force from acting on the cleaner body, impairing the mobility of the cleaner body, or contacting the cleaner body with the surface to be cleaned may damage the surface to be cleaned. There's a problem.

Further, when the dust collection chamber is filled with the captured dust, the air resistance passing through the dust collection chamber increases and the intake air volume gradually decreases, so that the exhaust air volume of the electric blower also decreases. There is also a problem that a sufficient floating force cannot be obtained, the mobility of the cleaner body is impaired, and the surface to be cleaned may be damaged due to contact between the cleaner body and the surface to be cleaned.

The present invention has been made in view of the above problems, and provides an electric vacuum cleaner which can obtain a good floating force even when the operating force of the operating body is applied, and is good regardless of the amount of dust collected. The purpose of the present invention is to provide an electric vacuum cleaner that can obtain a high floating force.

[0007]

Means for Solving the Problems] The electric vacuum cleaner according to claim 1, wherein includes a main body with an electric blower housed therein, the cleaning of the body
Open on the lower surface facing the surface and connect to the negative pressure side of the electric blower.
A suction port through which the electric air blows
An exhaust port for discharging exhaust air communicates with the pressure side of the machine, the <br/> located between the inlet and exhaust ports definitive on the lower surface of the main body is provided to surround the exhaust port , a skirt portion for applying a floating force to the body the by passing the exhaust air between the surface to be cleaned, the platform is positioned outside the skirt portion
A seat portion, a wheel rotatably rotatably supported on the pedestal portion by a rotary shaft extending in the horizontal direction, and a grip portion at one end portion, and the other end side is rotatably supported by the pedestal portion and the grip portion. the vertically is obtained by including a longitudinal-shaped operating member which is rotatable.

A table located outside the skirt
Rotatably drive wheel axis at a rotation axis along a horizontal direction on the seat
Is supported, and the other end of the long operating body is pivotally supported on this pedestal.
In this way, the grip on one end side of this operating body can be rotated vertically.
As a result, the operating force that moves the main body on the surface to be cleaned by holding the grip of the operating body is applied to the surface to be cleaned by the wheels that are in contact with the surface to be cleaned, and the main body moves due to the rotation of the wheels. There is almost no uneven operating force applied to the skirt that exerts a floating force on the main body, and the exhaust air from the electric blower creates a gap between the skirt and the surface to be cleaned provided between the intake and exhaust ports on the bottom of the main body. Good buoyancy can be obtained by passing through the spaces almost uniformly.

According to a second aspect of the present invention, there is provided the electric vacuum cleaner according to the first aspect, wherein the other end of the operating body is pivotally supported by a rotating shaft of a wheel.

Since the other end of the operating body is rotatably supported by the rotating shaft of the wheel, the operating force applied by the operating body does not act on the skirt and the exhaust air from the electric blower cleans the skirt and the skirt. Good floating force can be obtained by passing between the surfaces almost uniformly.

An electric vacuum cleaner according to a third aspect of the present invention includes a case body, an electric blower housed in the case body, a dust collection chamber defined in the case body on the negative pressure side of the electric blower, and the case. A suction opening that opens to the lower surface of the body facing the surface to be cleaned and communicates with the negative pressure side of the dust collection chamber, and a lower surface that opens to the lower surface of the case body that faces the surface to be cleaned and communicates with the positive pressure side of the electric blower. The exhaust air is exhausted between the exhaust port that exhausts exhaust air and the lower surface of the case body that is provided between the suction port and the exhaust port and that surrounds the exhaust port. a skirt portion for applying a floating force to the case body Te is obtained by including a bypass air passage provided in parallel with the dust collection chamber between the suction side of the suction port and the motor-driven blower.

Then, between the suction side of the case body that houses the electric blower and the lower surface of the case facing the surface to be cleaned, which communicates with the negative pressure side of the dust collection chamber, and the negative pressure side of the electric blower, Since the bypass air passages are provided in parallel with each other, even if the air passage resistance of the air reaching the negative pressure side of the electric blower through the dust collection chamber is increased due to the dust trapped in the dust collection chamber, for example, the bypass air passage is The air volume is ensured by the air reaching the negative pressure side of the electric blower via the skirt part provided between the suction port and the exhaust port on the lower surface of the case body and the surface to be cleaned to exert a floating force. The amount of exhaust air from the electric blower is secured, and a sufficient floating force is obtained.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The configuration of an embodiment of an electric vacuum cleaner of the present invention will be described below with reference to the drawings.

1 to 4, reference numeral 11 denotes an electric vacuum cleaner body. The electric vacuum cleaner body 11 has a bottom main body case 12 having an open upper surface and a closed lower surface, and a lower main body case 12 having an open bottom surface. A main body case 14 which is a case body having a substantially cylindrical shape having a diameter larger than that of the lower main body case 12 and which covers the lower main body case 12 and is detachably attached on the substantially coaxial axis.
have.

The lower body case 12 is formed in a substantially cylindrical shape with a bottom by a substantially cylindrical tubular portion 16 and a bottom plate portion 17 that closes the lower end of the tubular portion 16. At the peripheral edge of the lower surface, a cylindrical bottom portion 18 is provided which projects downward in a substantially cylindrical shape.

On the other hand, on the inner surface of the upper body case 13, a plurality of elongate plate-shaped gap holding members 20 made of an elastic material such as rubber are radially provided. Inner surface of the lower part and the cylindrical part 16 of the lower body case 12
It is adapted to face the outer surface of the device through a predetermined gap. Then, this gap serves as a suction chamber 21, and a suction port 22 that opens downward at the lower end edge of the upper main body case 13 and the lower end edge of the cylinder bottom portion 18 of the lower main body case 12 and faces the surface to be cleaned 22.
Are formed as openings.

An electric blower chamber 24 is formed in the center of the lower body case 12. The electric blower chamber 24 is provided in a substantially central portion of the cylindrical bottom portion 18 so as to be directed upward, and has an upper end edge protruding upward from an upper end edge of the cylindrical portion 16 and abutting the inner surface of the upper main body case 13 in a substantially cylindrical shape. Partition wall 25
And a partition bottom portion 26 that closes the lower end portion of the partition wall portion 25 and faces the cylinder bottom portion 18 with a predetermined gap therebetween to form a bottomed substantially cylindrical shape. The air passage chamber 27 is surrounded by the partition wall portion 25 and the gap between the cylinder bottom portion 18 and the partition bottom portion 26. Further, a substantially circular ventilation port 28 that communicates the electric blower chamber 24 and the air passage chamber 19 is formed in the substantially central portion of the partition bottom portion 26.

Further, an electric blower 30 is arranged in the electric blower chamber 24. The electric blower 30 includes a fan (not shown), an electric motor 31 that rotationally drives the fan and has an exhaust port, and a fan cover that opens an intake port that covers the fan.
It is composed of 32 and. The electric blower 30 is supported on the fan cover 32 side by a ring-shaped support body 33 made of, for example, rubber so that the intake port is airtightly opposed to the ventilation port 28. Further, a rubber shock absorber 35 is attached to the motor head 34 of the electric motor 31 so as to cover the motor head 34, and the shock absorber 35 is sandwiched and fixed to a rib (not shown) provided in the lower main body case 12.

On the other hand, between the cylindrical portion 16 of the lower main body case 12 and the partition wall portion 25 of the electric blower chamber 24, a pair of partition ribs 37, 37 are provided substantially in parallel, and these partition ribs 37, 37 are provided. A dust collection chamber 38 is defined between them. The partition wall portion 25 located at the bottom of the dust collection chamber 38 is provided with a cutout portion 39 that connects the dust collection chamber 38 and the air passage chamber 27. A holder 41 to which the dust bag 40 disposed in the dust collection chamber 38 is detachably attached is provided above the dust collection chamber 38. Further, an auxiliary filter 42 is detachably provided at the bottom of the dust collection chamber 38 so as to separate it from the air duct chamber 27.

A cylindrical exhaust chamber 44 is vertically formed on the outer surface of the partition wall portion 25 opposite to the dust collecting chamber 38. The partition wall portion 25 located above the exhaust chamber 44
Through hole 45 that connects the electric blower chamber 24 and the exhaust chamber 44.
Is cut out. Further, the lower portion of the exhaust chamber 44 is bent from the lower end of the partition wall portion 25 to substantially the center of the bottom plate portion 17, and has a substantially circular first exhaust port formed in the substantially central portion of the bottom plate portion 17.
Continuously with 46, it is communicated with the inside of the cylinder bottom portion 18 of the lower surface portion of the lower body case 12. Then, the exhaust air from the electric blower 30 is exhausted downward from the exhaust chamber 44 through the through hole 45 from the first exhaust port 46.

On the other hand, a rectifying body 48 is attached to the bottom plate portion 17 of the lower main body case 12 approximately at the center of the lower surface. As shown in FIG. 5, the rectifying body 48 is configured by radially providing a plurality of rectifying plates 50, 50 on one surface of a disc portion 49. Then, these rectifying bodies 48 are attached so that the rectifying plates 50, 50 are located on the lower surface of the bottom plate portion 17 around the first exhaust port 46, and the exhaust air from the first exhaust port 46 is horizontally oriented. It is ejected radially substantially uniformly.

Further, as shown in FIGS. 1 and 3, a skirt portion is provided on the lower surface of the bottom plate portion 17 of the lower main body case 12 so as to cover the rectifying body 48 attached below the first exhaust port 46.
52 are provided. The skirt portion 52 has an annular bag shape formed of flexible synthetic resin or rubber,
A reinforcing plate 53 attached to the lower surface of the disc portion 49 of the rectifying body 48 is provided in the substantially central portion, and the peripheral edge is attached to the bottom plate portion 17,
The exhaust air is exhausted inside so that it can expand in a ring shape. At the time of this expansion, the lower end of the vacuum cleaner body 11 projects slightly below the lower end of the main body 11. Further, in the skirt portion 52, a jet port 54 through which exhaust air exhausted inside is exhausted is opened in the vicinity of the periphery of the reinforcing plate 53 and toward the inside of the skirt portion 52 when the skirt portion 52 is expanded. A plurality of openings are formed at substantially equal intervals.

Further, a plurality of ribs (not shown) projecting in a wall shape on the inner peripheral side are provided on the inner peripheral surface of the cylindrical bottom portion 18 of the lower main body case 12, and free auxiliary wheels are respectively provided on the lower surfaces of these ribs. Has been. And these free auxiliary wheels,
When the skirt portion 52 expands, it separates from the surface to be cleaned. When the electric blower 30 does not drive and the skirt portion 52 does not expand, it is grounded to the surface to be cleaned, and the electric vacuum cleaner body 11 serves as a universal auxiliary wheel. It is possible to drive on the surface to be cleaned.

On the other hand, as shown in FIGS. 1 and 4, the upper main body case 13 is provided with a second exhaust port 56 having a plurality of holes at a substantially central portion corresponding to the electric blower chamber 24. ing.

In addition, at one edge of the lower end of the upper body case 13,
As shown in FIGS. 1 to 4, a pedestal portion 60 protruding in the outer peripheral direction is provided. A slewing wheel 61 is provided on the lower surface of the pedestal portion 60. This turning wheel 61 is shown in FIG.
As shown in FIGS. 4 and 6, a rotating shaft 62 rotatably supported on the lower surface of the pedestal portion 60 has a swivel seat 63 provided so as to project upward in the axial direction in the vertical direction. is doing. The swivel seat 63 is provided with a leg portion 65 that axially supports a substantially central portion of a rod-shaped shaft 64 whose axial direction is along the horizontal direction, and wheels 66 are rotatably supported by both ends of the shaft 64. There is. The wheel 66 is slightly separated from the surface 67 to be cleaned when the skirt portion 52 is inflated, and is grounded to the surface 67 to be cleaned when the skirt portion 52 is not inflated because the electric blower 30 is not driven. The vacuum cleaner body 11 and the free auxiliary wheel together with the surface to be cleaned 67
It is provided so that it can run on.

Further, a longitudinal rod-shaped handle 70 as an operating body for operating the vacuum cleaner body 11 is attached to the turning wheel 61. The handle 70 has a gripping part (not shown) that is gripped at one end, and has a pair of support parts 71, 71 branched into two branches at the other end. In the handle 70, the supporting portions 71, 71 are pivotally supported by the swivel seat 63 of the swivel wheel 61 at both ends of a shaft member 72 that is axially supported above the shaft 64 of the wheel 66 substantially in parallel with the shaft 64, One end side of the grip portion side is vertically rotatable. Further, the grip portion of the handle 70 is provided with a hand operation unit (not shown) for setting the drive state of the electric blower 30.

The position of the shaft member 72, which is the position for pivotally supporting the handle 70, is shorter than the distance between the center of gravity of the wheel 66 and the vacuum cleaner body 11 to the pivot portion of the wheel 66 and the handle 70. It is preferable that the rotary shaft 61 is axially supported at a position above the turning circumference of the turning wheel 61 and below the center of gravity of the vacuum cleaner body 11.

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

First, power is supplied through a power cord (not shown), and the electric blower 30 is driven by the operation of the hand operation unit provided in the grip portion of the handle 70 for cleaning.

By driving the electric blower 30, dust is sucked together with the air from the suction port 22 and is trapped from the suction chamber 21 into the dust bag 40 mounted in the dust collection chamber 38. Further, the air filtered by the dust bag 40 passes through the auxiliary filter 42 from the air passage chamber 27 to the ventilation port 28, the intake port of the electric blower 30, the inside of the electric blower 30, the exhaust port of the electric blower 30, and the electric blower. Passing through the blower room 24 one by one, part of the upper body case 13
From the second exhaust port 56 to the outside air outside the electric vacuum cleaner body 11 as exhaust air, and a part of the exhaust air flows through the cutout 39 and the exhaust chamber 44 in order, and from the first exhaust port 46 to the rectifying body 48. The air is exhausted into the skirt portion 52 while being rectified.

By exhausting air into the skirt portion 52, the skirt portion 52 expands in a ring shape, and the skirt portion 52 and the reinforcing plate 53.
And a space portion surrounded by the surface to be cleaned 67 is generated. Further, the exhaust air in the skirt portion 52 is exhausted from the ejection ports 54, 54 to the space portion, and the internal pressure of the space portion rises. As the internal pressure of this space increases, exhaust air passes and flows out from between the skirt portion 52 and the surface 67 to be cleaned. Due to the flow of the exhaust air, a slight gap between the skirt 52 and the surface 67 to be cleaned, in which the exhaust air leaks, is generated substantially uniformly, and a floating force acts on the vacuum cleaner body 11 to lift it.

The amount of exhaust air exhausted through the space between the skirt 52 and the surface 67 to be cleaned is a part of the exhaust air exhausted from the electric blower 30, so Since the amount of exhaust air exhausted from between the skirt portion 52 and the surface 67 to be cleaned is smaller, air is surely sucked together with dust from the suction port 22.

Therefore, the suction port facing the surface to be cleaned 67
Negative pressure for sucking dust is generated in 22 and even if the heavy electric blower 30 is housed, the vacuum cleaner body 11
Is lifted and does not come into contact with the surface to be cleaned 67.
The electric vacuum cleaner body 11 can be easily and smoothly moved on the surface 67 to be cleaned by holding the grip portion 70, and the cleaning workability can be improved.

When the dust bag 40 is full or is blocked by the suction port 22 and the suction chamber 21, the suction resistance increases and the air flow chamber 27 on the negative pressure side of the electric blower 30 is closed. As the degree of vacuum rises, a dust meter (not shown) provided in the upper main body case 13 indicates that fact. Based on this display, the drive of the electric blower 30 is stopped, the upper main body case 13 is removed from the lower main body case 12, the dust collecting bag 40 and the auxiliary filter 42 are replaced, and the maintenance inspection such as removing the blocked dust is performed.

By the way, when the vacuum cleaner body 11 is moved on the surface 67 to be cleaned by an operation such as pushing or pulling the handle 70 in the front-back direction or swinging the handle 70 in the left-right direction, a particularly large force is applied. The diagonally downward operating force that acts when the handle 70 is pushed is applied to the shaft member 72 of the turning wheel 61 that supports the handle 70. In the operating force applied to the shaft member 72, the component force in the horizontal direction is the vacuum cleaner body 11
And the component force in the vertical direction, which is the vertical direction, is a force that presses the turning wheel 61 that pivotally supports the shaft member 72 downward. The wheel 66 of the turning wheel 61, which is separated from the surface 67 to be cleaned by the force of pressing the turning wheel 61 downward, contacts the surface 67 to be cleaned, and the force of pressing the turning wheel 61 downward is the surface of the wheel 66 to be cleaned. The urging force acts on the vacuum cleaner body 11 by pressing it against the 67, and the skirt portion 52 that exerts a floating force on the vacuum cleaner body 11 receives almost no pressing force, and the vacuum cleaner body 11 hardly tilts. Then, as the wheels 66 rotate on the surface 67 to be cleaned, the electric vacuum cleaner body 11 moves forward with almost no inclination.

Therefore, the electric vacuum cleaner body 11 is applied with an operation force in an oblique direction, for example, a direction in which the handle 70 is pushed, and the exhaust air leaks unevenly from the tilted skirt portion 52, so that a substantially uniform floating force cannot be obtained. Can be prevented. Therefore,
Since a substantially uniform and good floating force is obtained, the vacuum cleaner body 11 is tilted, which makes it difficult to move the vacuum cleaner body 11, or a part of the tilted vacuum cleaner body 11 has a surface to be cleaned 67.
It is also possible to prevent the main body 11 of the electric vacuum cleaner and the surface 67 to be cleaned from being damaged by contact with.

As described above, according to the above-described embodiment, since the handle 70 is positioned above the wheel 66 and pivotally supported, the grip 70 of the handle 70 holds the vacuum cleaner body 11 on the surface 67 to be cleaned. The operating force to be moved by is added to the surface to be cleaned 67 by the wheels 66 grounded to the surface to be cleaned 67, and the rotation of the wheels 66 causes the electric vacuum cleaner body 11 to run, so that a floating force is applied to the electric vacuum cleaner body 11. Almost no operating force is applied to the skirt portion 52 to be acted, the skirt portion 52 and the surface to be cleaned 67 pass substantially uniformly, and a good floating force is obtained, so that the operability can be improved.

[0038] Then, the turning wheels 61, to position the outer peripheral side of the skirt portion 52, the vacuum cleaner main body 11 is inclined position hardly at the operation force of the handle 70, the position for supporting the ie handle 70 wheels A structure can be easily provided at a position where the distance between the center of gravity of 66 and the vacuum cleaner main body 11 is shorter than the distance between the wheel 66 and the shaft support portion of the handle 70, and a good floating force can be obtained with a simple structure.

Since the body case 14 having the suction port 22 for cleaning is provided with the skirt portion 52 for lifting the body case 14, a negative pressure is generated in the suction port 22 for sucking dust. Also, dust can be sucked from the surface to be cleaned 67, and the surface can be smoothly moved while floating, and cleaning workability can be improved.

Further, since the suction port 22 is located on the outer peripheral side of the skirt portion 52, the exhaust air leaking from the skirt portion 52 causes dust adhering to the surface 67 to be cleaned to float up and is sucked from the suction port 22. At the same time, the dust on the surface to be cleaned 67 is sucked in through the suction port 22 without being blown off,
Cleaning efficiency can be improved.

Since the skirt portion 52 is formed of a flexible member so as to be inflatable, even if the surface 67 to be cleaned has irregularities, the skirt portion 52 is deformed to conform to the irregularities and the skirt portion is deformed.
52 and the air layer between the surface to be cleaned 67 Ru is maintained, easily floating state is uneven be maintained can smoothly run even the cleaning surface 67, it is possible to improve the running property, the skirt portion 52
Also has a function as a buffer with the surface to be cleaned 67, so that the surface 67 to be cleaned does not get damaged even with the surface 67 to be cleaned having irregularities.

Further, the skirt portion 52 is hollow and the inside is first
The exhaust air that is communicated with the exhaust port 46 of the
Since it is jetted from 54, 54, the floating force can be obtained even with a small exhaust air volume, so it is the second location where the air passage resistance is small.
It is possible to increase the amount of exhaust air from the exhaust port 56, etc., improve the suction efficiency, reduce the load on the electric blower 30, and
Electric vacuum cleaner body with a simple structure and small exhaust air volume
Since it is possible to float on 11 and the amount of exhaust air that leaks from between the skirt portion 52 and the surface 67 to be cleaned decreases, the amount of exhaust air that is sucked in from the suction port 22 located in the direction in which exhaust air leaks also decreases. The amount of air sucked together with the dust from the suction port 22 is increased, the dust collection efficiency is improved, and the cleaning can be efficiently performed.

Further, since the electric blower 30 is disposed in the substantially central portion and the skirt portion 52 is disposed in the substantially central portion and is positioned below the center of gravity, the electric vacuum cleaner body 11 can be stably levitated.

In the above embodiment, the skirt portion 52 is formed in a flexible and inflatable hollow shape. However, for example, the cylindrical bottom portion 18 of the lower main body case 12 is used as the skirt portion. Any structure may be used in which a skirt portion is provided so as to cover the exhaust port 46, and any structure may be used for exhausting.

The handle 70 is pivotally supported on the swivel seat 63 of the swivel wheel 61 above the wheel 66.
7, or as shown in FIG. 7, the handle 70 is directly supported on the shaft 77 that supports the wheel 76 of the turning wheel 75.
It suffices to support the shafts above the wheels 66 and 76. Even above the wheel 66, above the turning circumference of the turning wheel 61 where the distance between the center of gravity of the wheel 66 and the center of gravity of the vacuum cleaner body 11 is shorter than the distance between the wheel 66 and the pivotal support portion of the handle 70. This position is preferable because the electric blower main body 11 hardly tilts when it is axially supported below the center of gravity of the electric vacuum cleaner main body 11.

In FIG. 7, the swivel seat 78 includes a pair of bearings 79, which are bifurcated at one end of the rod-shaped rotary shaft 62.
The other end side which is formed in a substantially inverted Y shape having 79 and is not branched is rotated on the lower surface of the pedestal portion 60 by a rotating shaft 62 in which the axial direction is along the vertical direction and the axial direction is the rotating shaft, that is, It is pivotally supported. The swivel seat 78 also includes a pair of bearings 79, 79.
Shaft 77 bridged through these bearings 79, 79 between
A wheel 76 that is rotatably supported is provided in the to form a turning wheel 75.

According to the structure shown in FIG. 7, since the handle 70 for moving the vacuum cleaner body 11 is directly supported on the shaft 77 for supporting the wheel 76 of the turning wheel 75, the vacuum cleaner body is
Since the operation force for moving 11 is directly applied to the wheels 76 and does not directly act on the vacuum cleaner body 11, it is possible to reliably prevent the vacuum cleaner body 11 from being tilted by the operation force even if a large operation force is applied.

Furthermore, the handle 70 is not limited to the structure in which the shaft member 72 is pivotally supported, but as shown in FIG.
A spherical concave receiving portion 81 is provided on the upper surface of the handle, and a substantially tight ball head 83 provided at the end of the handle 82 is slidably accommodated in the receiving portion 81 so that the grip portion side of the handle 82 can swing. Any configuration may be used, such as a configuration of supporting the above.

Although the wheels 66 and 76 are separated from the surface 67 to be cleaned when the skirt portion 52 expands, the wheels 66 and 76 may contact the ground even if the skirt portion 52 expands. .

Further, although the structure in which the dust collecting bag 40 is mounted in the dust collecting chamber 38 has been described, the dust collecting bag 38 is not used and the dust collecting chamber 38 is not used.
It is also possible to have a structure in which dust is trapped inside.

Next, still another embodiment of the electric vacuum cleaner of the present invention will be described with reference to FIGS. 9 and 10.

In the embodiment shown in FIGS. 9 and 10, a partition wall 91 is provided in the dust collecting chamber 38 of the embodiment shown in FIGS. 1 to 6, and the partition wall 91, the partition ribs 37, 37 and the electric motor. The dust collection chamber 92 is defined by the partition wall portion 25 of the blower chamber 24, and the dust collection chamber is defined by the partition wall 91, the partition ribs 37, 37, and the tubular portion 16.
A bypass air passage 93 is formed in parallel with 92.

In addition, a flat plate-like lattice portion 94 that is gradually inclined toward the holder 41 of the dust collection chamber 92 is provided at the upper portion on the upstream side of the bypass air passage 93. In addition, this lattice part 94
Is a configuration in which air does not pass through the bypass air passage 93 when the dust bag 40 is not clogged, and air passes when the dust bag 40 is clogged, for example, ventilation of the dust bag 40. The dust collecting bag 40 is formed with a filter that has low air permeability and a higher air permeability than when the dust collecting bag 40 is clogged, or a valve element that opens when the dust collecting bag 40 starts to clog, or a dust collecting bag 40
A pressure sensor is provided on the downstream side of, and a shutter is provided to open the bypass air passage 93 when a negative pressure at which the dust collecting bag 40 starts to be clogged is detected.

When the dust collecting chamber 92 is gradually sucked into the dust collecting chamber 92 and is gradually clogged during cleaning, the air sucked through the suction port 22 is
While passing through 92, a part of it passes through the bypass air passage 93, is sucked from the intake port of the electric blower 30, and is discharged from the first exhaust port 46.

Therefore, even if the dust-collecting bag 40 is clogged, the amount of exhaust air exhausted from the exhaust port 46 can be secured, and the clogging of the dust-collecting bag 40 reduces the amount of exhaust air and prevents the floating force from being obtained. And a sufficient floating force can be obtained, so that it is possible to prevent a part of the electric vacuum cleaner body 11 from coming into contact with the surface 67 to be cleaned and damaging the electric vacuum cleaner body 11 or the surface 67 to be cleaned. You can improve the property.

Further, since the grid portion 94 is provided so as to be inclined, even if a part of dust adheres to the grid portion 94 during cleaning, if the negative pressure disappears when the driving of the electric blower 30 is stopped after cleaning, the dust adheres. The dust that falls into the dust collection chamber 92 is trapped and captured, so that when the electric blower 30 is driven again, it is possible to easily secure a sufficient exhaust air volume with a simple structure and obtain a buoyancy force even after long-term use. It is possible to prevent the operability from being deteriorated.

[0057]

According to the vacuum cleaner of the first aspect of the present invention ,
The pedestal located outside the cart has wheels and other controls.
Since the end side is rotatably supported, the operating force for moving the main body on the surface to be cleaned while holding the grip of the operating body is applied to the surface to be cleaned by the wheel grounding the surface to be cleaned. The rotation causes the main body to run, and the non-uniform operating force is hardly applied to the skirt part that exerts a floating force on the main body, and the exhaust air from the electric blower is provided between the suction port and the exhaust port on the lower surface of the main body. Floating force is obtained by passing between the skirt portion and the surface to be cleaned substantially uniformly, and operability can be improved.

According to the electric vacuum cleaner of the second aspect, in addition to the effect of the electric vacuum cleaner of the first aspect, since the other end side of the operating body is pivotally supported by the rotary shaft of the wheel, the operating force by the operating body is increased. Even if the exhaust air from the electric blower passes substantially evenly between the skirt portion and the surface to be cleaned and a large operating force is applied, the floating force can be reliably ensured.

According to the third aspect of the electric vacuum cleaner, the bypass air passage is provided in parallel with the dust collecting chamber between the suction port on the lower surface of the case body housing the electric blower and the negative pressure side of the electric blower. Therefore, even if, for example, the air duct resistance of the air reaching the negative pressure side of the electric blower through the dust collection chamber is increased due to the dust trapped in the dust collection chamber, the negative pressure side of the electric blower is bypassed via the bypass air duct. The amount of air is ensured by the air that reaches to, and the exhaust air from the electric blower that passes between the skirt portion provided between the suction port and the exhaust port on the lower surface of the case body and the surface to be cleaned and exerts a floating force is applied. Air volume can be secured, sufficient floating force can be obtained, and deterioration of operability can be prevented.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of an electric vacuum cleaner of the present invention.

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

FIG. 3 is a bottom view of the same.

FIG. 4 is a plan view of the same.

FIG. 5 is a perspective view showing the same rectifying body.

FIG. 6 is a perspective view showing a slewing wheel pivotally supporting the handle.

FIG. 7 is a perspective view showing a slewing wheel pivotally supporting a handle of another embodiment of the electric vacuum cleaner according to the present invention.

FIG. 8 is a cross-sectional view showing the vicinity of a pedestal portion that pivotally supports a turning wheel and a handle of still another embodiment of the electric vacuum cleaner according to the present invention.

FIG. 9 is a sectional view showing still another embodiment of the vacuum cleaner of the present invention.

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

[Explanation of symbols]

11 Vacuum cleaner body 14 Main body case as case body 22 Suction port 30 Electric blower 46 First exhaust port as exhaust port 52 Skirt portion 60 Pedestal portion 66,76 Wheel 67 Cleaning surface 70,82 Handle as operating body 92 Dust collection room 93 Bypass air passage

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Claims (3)

(57) [Claims] 1. A main body accommodating an electric blower, and the electric blower which is opened on a lower surface of the main body facing a surface to be cleaned.
A suction port communicating with the negative pressure side of the blower and a communication opening with the lower surface of the main body that communicates with the positive pressure side of the electric blower.
And an exhaust port for discharging exhaust wind, located between the inlet and exhaust ports definitive on the lower surface of the main body is provided surrounding the outlet, the between the surface to be cleaned A skirt portion that allows exhaust air to pass therethrough and exerts a floating force on the main body, a pedestal portion that is located outside the skirt portion, and a rotatably rotatably supported on the pedestal portion by a rotary shaft extending in the horizontal direction. It has a wheel and a grip on one end, and the other end is pivotally supported on the pedestal.
Vacuum cleaner, characterized by comprising a longitudinal-shaped operating member which is rotatable with the gripper in the vertical direction Te. 2. The vacuum cleaner according to claim 1, wherein the other end of the operating body is pivotally supported by a rotating shaft of a wheel. 3. A case body, an electric blower housed in the case body, a dust collecting chamber defined in the case body on the negative pressure side of the electric blower, and a surface to be cleaned of the case body. An inlet opening to the lower surface and communicating with the negative pressure side of the dust collecting chamber; and an exhaust opening opening to the lower surface of the case body facing the surface to be cleaned and communicating with the positive pressure side of the electric blower for discharging exhaust air. A buoyant force is applied to the case body by passing the exhaust air between the surface to be cleaned which is provided on the lower surface of the case body between the suction port and the exhaust port and surrounds the exhaust port. An electric vacuum cleaner comprising: a skirt portion to be operated; and a bypass air passage provided in parallel with the dust collection chamber between the suction port and the negative pressure side of the electric blower.