JP3186015B2 - Electric vacuum cleaner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION This invention is, the wheels on both sides of the traveling direction
The present invention relates to a vacuum cleaner having a rotatable unit .

[0002]

2. Description of the Related Art Conventionally, for example, a structure shown in FIG. 9 is known as this kind of vacuum cleaner.

[0003] The vacuum cleaner shown in Fig. 9 is a pair of wheels that follow a case body 71 accommodating an electric blower (not shown) that generates a negative pressure for collecting dust. The wheel 72 is rotatably supported. These running wheels 72, 72 have a cylindrical shaft portion 74 protrudingly formed substantially at the center of a substantially disk-shaped wheel portion 73. Further, on both side walls 75 of the case body 71 in the running direction, bearing portions 76 projecting cylindrically toward the side are formed. And the bearing part of the case body 71
The shaft 74 of the running wheel 72 is rotatably fitted to the
Is rotatably supported.

[0004]

However, in the vacuum cleaner shown in FIG. 9, the shaft 74 of the traveling wheel 72 is supported on the side wall 75 of the case body 71. The side wall 75 of the body 71 and the wheel portion 73 of the running wheel 72 have a double structure, the size in the width direction of the vacuum cleaner is increased, the weight is increased, and the handleability at the time of cleaning is reduced, There is also a problem that the cost increases.

The present invention has been made in view of the above problems, and has as its object to provide a small and lightweight vacuum cleaner.

[0006]

According to a first aspect of the present invention, there is provided an electric vacuum cleaner, comprising: a case housing an electric blower;
Both sides to set the vignetting, the wheel portion for closing the axial tip of the
Having a substantially cylindrical shaft portion and a wheel portion of the shaft portion
Exhaust air that connects the exhaust side of the electric blower to outside air.
A mouth, and an annular wheel portion rotatably provided on the outer periphery of the shaft portion .

[0007] vacuum cleaner according to claim 2 wherein the claim 1 Symbol
Of the vacuum cleaner on the
This is provided with an exhaust filter .

[0008]

[Action] vacuum cleaner according to claim 1 is on both sides of the case body housing the electric blower, for closing the axial tip Wheel
Setting a generally cylindrical shaft portion having a pole tip only that. And electric transmission
Connect the exhaust port that connects the exhaust side of the
And an annular wheel portion is rotatably provided on the outer periphery of the shaft portion . As a result, the axial end of the wheel portion of the shaft portion
By closing both sides of the case body at, the side wall of the case body is configured, so that the size can be reduced and the case body
Must have an exhaust port to exhaust the exhaust air from the electric blower.
No need. In addition, for example, an exhaust port is provided in the case body.
Even if this vent is blocked during use, the wheel
Exhaust air from the electric blower is exhausted from the exhaust port provided in the section
This prevents the efficiency of cleaning from dropping due to blockage of the exhaust port.
It is .

[0009] The vacuum cleaner according to the second aspect is the first aspect.
Exhaust filter having air permeability in the above described vacuum cleaner
The exhaust port was blocked by the
Sound effects can be obtained.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

1 to 3, reference numeral 1 denotes a vacuum cleaner main body. The vacuum cleaner main body 1 includes a lower case 2a having an open upper surface, and an upper case 2b for closing a rear upper surface of the lower case 2a. A main body case 2 is formed as a case body having a front upper surface portion opened and a lid body 3 for closing the opening of the front upper surface portion of the main body case 2 so as to be openable and closable. Further, the main body case 2 is provided with a swivel wheel 4 that can freely turn on the lower surface on the front side.

A substantially cylindrical shaft portion having a central axis in a direction orthogonal to the running direction, which is a direction intersecting the running direction of the case body 2, is provided on the rear side of both sides in the running direction of the main body case 2. 6 are provided integrally. Further, a plurality of claw portions 7 are provided on a peripheral edge of the distal end of the shaft portion 6 so as to protrude outward in the radial direction. In addition, the claw portion 7 is provided with a tapered surface 8 so that the diameter becomes smaller toward the distal end direction of the shaft portion 6. Also, at the tip of the shaft portion 6, the shaft of the shaft portion 6 is provided.
A plate-shaped wheel portion 9 for closing the front end in the direction is integrally provided, and a plurality of exhaust ports 10 are formed in the wheel portion 9, and the inside of the wheel portion 9 has air permeability for closing the exhaust port 10. An exhaust filter 11 having a silencing effect is provided.

On the outer peripheral surface of the shaft portion 6, an annular wheel portion 13 made of, for example, hard rubber,
And is rotatably fitted. The fitting of the wheel portion 13 is performed by bringing the inner peripheral edge of the wheel portion 13 into contact with the tapered surface 8 of the claw portion 7 and elastically deforming the wheel portion 13 to expand the diameter of the wheel portion 13 with the tapered surface 8. So that it fits into the part 6.
Further, between the wheel portion 13 and the outer peripheral surface of the shaft portion 6, the wheel portion 13 is provided.
The lubricating material 14 is provided so that the can rotate smoothly with respect to the shaft portion 6. The lubricating material 14 can be in any form such as a semi-solid such as grease or a sheet. A pair of driven rear wheels 15 as running wheels are formed at the rear portions on both sides in the running direction of the main body case 2 by the wheel portion 13 and the shaft portion 6 provided integrally with the main body case 2.

On the other hand, in the vacuum cleaner main body 1, a partition 17 having a grid-like communication port 16 forms a dust collecting chamber 18 whose upper part is opened, and is formed on the front side in the traveling direction of the vacuum cleaner main body 1. The rear wheels 15 are driven behind the dust collection chamber 18.
An electric blower chamber 19 communicating with the inner periphery of the shaft portion 6 is formed. In the dust collecting chamber 18, a dust collecting bag 22 is detachably mounted by a holder 21 pivotally mounted in the dust collecting chamber 18.

An auxiliary dust collection filter 23 for covering the communication port 16 is detachably mounted on the front surface of the partition wall 17.
Note that the dust bag 22 and the auxiliary dust filter 23 are attached and detached via the upper opening of the dust collection chamber 18.

On the other hand, in the electric blower room 19, an electric blower
25 are arranged. The electric blower 25 includes an electric unit 26 (not shown) for rotating a fan, for example, about a shaft, and a fan cover 27 for covering the fan. An intake port 28 is formed in the center of the front surface of the fan cover 27, and an exhaust port (not shown) is formed in the frame of the electric unit 26.

An annular rubber support 31 is fitted to the front end of the electric blower 25 at the outer peripheral edge of the front end, and a rubber buffer 32 is attached to the rear end.

On the other hand, on the lower surface of the upper case 2b, an upper rib front portion 34 projecting downward and having a lower end portion formed in a concave arc shape along the outer peripheral surface of the fan cover 27, and It is located rearward of and protrudes downward substantially in parallel, and a lower end protrudes and forms an upper rib rear portion 35 formed in a concave arc shape along the outer peripheral surface of the rear end of the electric unit 26.

Further, the upper surface of the lower case 2a is opposed to the upper rib front portion 34 and the upper rib rear portion 35 and protrudes upward, and the upper end portion is formed in a concave arc shape along the outer peripheral surface of the fan cover 27. And a lower rib rear portion 37 whose upper end portion is formed in a concave arc shape along the outer peripheral surface of the rear end portion of the electric unit 26, respectively.

A buffer 32 attached to cover the rear end of the electric blower 25 is held between the upper and lower rib rear ends 35 and 37, and the rear end of the electric blower 25 is interposed between the buffers 32. The outer peripheral surface of an annular rubber support 31 fitted to the front end of the electric blower 25 is fixedly held at the upper and lower rib rear portions 35, 37, and is fixed at the upper and lower rib front portions 34, 36. Is sandwiched and fixed between upper and lower rib front portions 34, 36 via a rubber support 31.

The front end side of the electric blower 25 is connected to a dust collecting chamber 18 provided with a dust bag 22 for collecting dust sucked together with air by an air inlet 28 of the electric blower 25 by a rubber support 31. It is airtightly communicated via 16.

An exhaust chamber 39 is defined in the vacuum cleaner main body 1 behind the electric blower chamber 19, and is formed on the outer rear upper surface of the upper case 2b of the vacuum cleaner main body 1. An exhaust port communicating with the exhaust port of the electric blower 25 via the exhaust chamber 39
An opening 40 is formed.

Further, a drum chamber (not shown) is formed in the vacuum cleaner main body 1 at the left side in the traveling direction of the electric blower chamber 19, and the drum chamber (not shown) is formed therein.
And a drum body around which a power cord for supplying power to the power supply is wound.

A suction portion 41 is provided substantially at the center of the front side of the main body case 2, and the suction portion 41 is formed such that an inner opening 42 and an outer opening 43 face each other. Also open inside
A cylindrical suction port 44 is formed in the middle opposite to the opening 42 and the outside opening 43. The suction port 44 has a front portion opening to the front of the vacuum cleaner main body 1 and a rear portion opening to the dust collection chamber 18.

On the other hand, the lid 3 has a rear end pivotally attached to the upper case 2b, and covers the dust collection chamber 18 so as to be openable and closable from above.

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

During normal cleaning, the lid 3 is closed,
Power is supplied from a power cord drawn from a drum body (not shown), and a hose is connected to the suction port 44 to perform cleaning. The electric blower 25 is driven by the power supplied from the power cord, and by this driving, dust is sucked together with air from the suction port 44 through the hose, and is guided to the dust collection chamber 18 of the vacuum cleaner main body 1, and the dust is collected. Captured in bag 22.

The air filtered by the dust bag 22 is supplied to the auxiliary dust filter 23, the communication port 16, the intake port 28 of the electric blower 25, the inside of the electric blower 25, the exhaust port of the electric blower 25, The exhaust port 10 of the driven rear wheel 15 and the exhaust port of the body case 2 pass through the shaft portion 6 of the wheel 15 or the exhaust chamber 39 sequentially.
The air is exhausted from 40 to the outside air outside the vacuum cleaner main body 1 as exhaust air.

When the vacuum cleaner main body 1 is stored after the cleaning is completed, the power supply cord is wound and stored by rotating the drum body, and the hose is removed and stored.

According to the above embodiment, since the side wall of the main body case 2 is constituted by the wheel portion 9 provided on the shaft portion 6 of the driven rear wheel 15 and closing the tip of the shaft portion 6, the conventional vacuum cleaner has The double structure of the driven rear wheel and the side wall of the main body case can be eliminated, and the main body case 2 can be reduced in size and weight, thereby improving the manufacturability and reducing the cost.

By the way, when cleaning a high position such as the upper part of furniture, as shown in FIG.
The cleaning is performed in a standing state such that the rear part of the vehicle in the traveling direction faces the floor surface. At this time, the exhaust port 40 provided at the rear part of the main body case 2 is closed at the floor, but the exhaust air is
Exhaust port 10 opening in wheel section 9 through shaft section 6 of 15
, The cleaning efficiency can be prevented from lowering due to blockage of the exhaust port 40 of the main body case 2. Further, since the area of the exhaust opening can be increased, the exhaust resistance can be reduced and the cleaning efficiency can be improved.

In the embodiment shown in FIGS. 1 to 4, the exhaust port 40 is provided at the rear of the main body case 2 and the exhaust port 10 is provided at the wheel portion 9 of the driven rear wheel 15. It can also be provided only on one of them. When the exhaust port 40 is not provided at the rear part of the main body case 2, the strength of the rear part of the main body case 2 is improved, so that it is not necessary to provide a rib for reinforcement, and the size and weight can be further reduced. Manufacturability is improved, and costs can be reduced.

Next, another embodiment of the vacuum cleaner according to the present invention will be described with reference to FIGS.

In the embodiment shown in FIGS. 5 and 6, the shaft portion 6 provided in the main body case 2 of the embodiment shown in FIGS. Further, the wheel portion 51 has a substantially disk-shaped wheel portion 53 having a diameter larger than the diameter of the shaft portion 52, and a tire formed by bulging the peripheral portion of the wheel portion 53 to one surface side of the wheel portion 53. Part 54 and this tire part
Projects in a ring shape toward the center on the inner peripheral surface of 54, and the tip is the shaft
And a flange portion 55 slidably abutting on the outer peripheral surface of the second member 52. Then, the wheel portion 51 is rotatably fitted and supported on the shaft portion 52 by fitting the flange portion 55 to the shaft portion 52, so that the wheel portion 51 and the shaft portion 52 can be driven as running wheels. A pair of wheels 56 is provided at both rear portions of the body case 2 in the running direction.

In the wheel portion 53 of the wheel portion 51, a plurality of exhaust ports 10 are formed. Further, on the inner side of the wheel portion 53 on which the tire portion 54 swells, there is provided an exhaust filter 11 having a gas-permeable and sound-absorbing effect for closing the exhaust port 10.

Further, on the inner surface side of the wheel portion 53, a guide groove portion 57 in which the leading edge of the shaft portion 52 is slidably engaged is provided along the circumferential direction, and the wheel portion 51 is rotated around the shaft portion 52. When freely supported, the leading edge of the shaft portion 52 is engaged with the guide groove portion 57, so that the rotation of the wheel portion 51 is smoothly guided.

According to the embodiment shown in FIGS. 5 and 6, similarly to the embodiment shown in FIGS. 1 to 4, the side wall of the main body case 2 is formed by the wheel portion 53 of the wheel portion 51 of the driven rear wheel 56. With this configuration, the double structure of the driven rear wheel of the conventional vacuum cleaner and the side wall of the main body case can be eliminated, and the main body case 2
Can be reduced in size and weight, productivity can be improved, and costs can be reduced. Further, even if the exhaust port 40 of the main body case 2 is closed, the exhaust air passes through the shaft portion 52 of the driven rear wheel 56 and is exhausted from the exhaust port 10 opened to the wheel portion 53. Along with preventing a decrease in cleaning efficiency due to the blockage of the port 40, the opening area of the exhaust ports 10, 40 increases,
Exhaust resistance can be reduced and cleaning efficiency can be improved.

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

The embodiment shown in FIGS. 7 and 8 is different from the embodiment shown in FIGS. 5 and 6 in that a plurality of rollers 61 are provided instead of the lubricant 14 on the outer peripheral surface of the shaft portion 52.

That is, in the embodiment shown in FIGS. 7 and 8, a plurality of concave housing portions 63 are provided on the outer peripheral surface of the shaft portion 62 and open radially outward. Also, a roller 65 is formed by providing shafts 65 that are located on the center axis of the substantially columnar wheel 64 and protrude along the axial direction at both ends in the axial direction, and the center axis of the roller 61 is The roller 61 is rotatably supported in the housing portion 63 along the axial direction such that the outer peripheral surface of the roller 61 projects from the outer peripheral surface of the shaft portion 62.

Then, the flange portion 55 of the wheel portion 51 is
And the front end of the flange portion 55 is brought into contact with the outer peripheral surface of the roller 61, and the driven rear wheel 67 as a running wheel is rotatably fitted and supported by the roller 61 so that the wheel portion 51 is rotatably fitted to the shaft portion 62. Make up.

According to the embodiment shown in FIGS. 7 and 8, similarly to the embodiment shown in FIGS. 5 and 6, the side wall of the main body case 2 is formed by the wheel portion 53 of the wheel portion 51 of the driven rear wheel 67. With this configuration, the double structure of the driven rear wheel of the conventional vacuum cleaner and the side wall of the main body case can be eliminated, and the main body case 2
Can be reduced in size and weight, productivity can be improved, and costs can be reduced. Further, even if the exhaust port 40 of the main body case 2 is closed, the exhaust air passes through the shaft portion 62 of the driven rear wheel 67 and is exhausted from the exhaust port 10 opened to the wheel portion 53. The cleaning efficiency can be prevented from lowering due to the blockage of the opening 40, and the opening areas of the exhaust ports 10, 40 can be increased.

Further, since the driven rear wheel 67 travels on the floor surface which is contaminated with dust, the dust easily adheres to the driven rear wheel 67, and the adhering dust may enter between the flange portion 55 and the shaft portion 62. Since the flange portion 55 and the shaft portion 62 do not slidably contact with each other and the wheel portion 51 is rotatable by the rotation of the roller 61, wear between the shaft portion 62 and the flange portion 55 due to dust is reduced. As a result, smooth rotation of the wheel portion 51 can be obtained.

[0044]

According to the first aspect of the present invention, both ends of the case body are closed at the axial end of the wheel portion of the shaft portion.
Since constituting the sidewall Te, along with attained small type quantification,
Exhaust that exhausts exhaust air from the electric blower separately to the case body
There is no need to provide a port, and an exhaust port is provided in the case body
Even if this vent is blocked during use, the wheel
Exhaust can be exhausted from the exhaust port provided in the
This can prevent the cleaning efficiency from being lowered .

[0045] According to the electric vacuum cleaner according to claim 2, wherein
In addition to the effects of the vacuum cleaner described in Item 1, the air-permeable vacuum cleaner
If the exhaust port is closed with a gas filter,
Can be silenced when

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing one embodiment of a vacuum cleaner according to the present invention.

FIG. 2 is a sectional view of the vicinity of a traveling wheel of the electric vacuum cleaner body.

FIG. 3 is a cross-sectional view of the main body of the electric vacuum cleaner.

FIG. 4 is an explanatory diagram showing a usage state of the electric vacuum cleaner body in a standing state.

FIG. 5 is an exploded perspective view showing another embodiment of the vacuum cleaner of the present invention.

FIG. 6 is a sectional view of the vicinity of a traveling wheel of the electric vacuum cleaner body.

FIG. 7 is an exploded perspective view showing still another embodiment of the vacuum cleaner of the present invention.

FIG. 8 is a cross-sectional view of the vicinity of a traveling wheel of the electric vacuum cleaner body.

FIG. 9 is an exploded perspective view showing one embodiment of a conventional vacuum cleaner.

[Description of Signs] Body Case as Two Case Body 6, 52, 62 Shaft 9, 53 Wheel 10 Exhaust Port 11, Exhaust Filter 13, 51 Wheel 25 Electric Blower

Continuation of front page (56) References JP-A-62-194826 (JP, A) JP-A-4-321425 (JP, A) JP-A-4-236929 (JP, A) JP-A-5-49561 (JP) JP-A-60-22221 (JP, A) JP-A-5-137674 (JP, A) JP-A-8-52099 (JP, A) Japanese Utility Model Application Showa 55-5893 (JP, U) Japanese Utility Model Application 4-73340 (JP, U) UK Patent Application Publication 2291486 (GB, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47L 9/00 A47L 9/00 102

Claims (2)

(57) [Claims] 1. A a case body accommodating the electric blower, set vignetting on both sides of the case body to close the axial tip
A substantially cylindrical shaft portion having a wheel portion; and
An electric vacuum cleaner comprising: an exhaust port for communicating the air side to the outside air; and an annular wheel portion rotatably provided on an outer periphery of the shaft portion . 2. An exhaust fan having air permeability for closing an exhaust port.
The vacuum cleaner according to claim 1 , further comprising a filter .