JPH06154132A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To reduce the dimensions of the sidth and height of a case body for providing the compact case body by shaft-supporting a shaft member of a drum body for taking up and receiving a power supply cord by support walls of the case body and locating shaft ends projecting from the support wall coaxially with the hollow parts of the shaft of travelling wheels. CONSTITUTION:A vacuum cleaner body 1 has a drum chamber 44 defined by vertically defining wall parts 42, 43 on one side of a motor fan chamber 19, and a drum body 47 wound around by a power supply cord 46 is rotatably received in the drum chamber 44. Then, while a bearing part 54 of the drum body 47 is sandwiched by vertically defining wall parts 42, 43, an engaging recess part 55a of the shaft member 55 of the drum body 47 in the opposite side end to the bearing part 54 is engaged with vertical journal wall parts 57, 58 to support the shaft member 55. The tip of the shaft member 55 in front of the engaging recess part 55a is located coaxially with an insert part 10 provided in a shaft part 9 of travelling wheels 7 shaft-supported by wheel bearing parts 14 formed on both sides of a body case 2 to obliterate interference with the travelling wheels 7 and realize a compact vacuum cleaner.

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 having a drum body for winding and storing a power cord and a traveling wheel driven by the traveling.

[0002]

2. Description of the Related Art Conventionally, as an electric vacuum cleaner of this type, for example, a structure shown in FIG. 5 is known.

The electric vacuum cleaner shown in FIG. 5 has a case body 81.
Electric blower 82 that generates negative pressure to collect dust inside
And a drum body 84 for winding and storing a power cord 83 for supplying electric power to the electric blower 82. Further, the drum body 84 has a cylindrical shaft support portion 86 in the center axis, and a disk-shaped flange portion 87 orthogonal to the axial direction is substantially parallel to the outer peripheral surface near both axial ends of the shaft support portion 86. The flange portion 87 defines a winding portion 88 around which the power cord 83 is wound. Further, this drum body 84 is
A shaft member 90 having an engaging recess 90a at one end thereof is rotatably fitted, and a rib 91 formed in the case body 81 is engaged with the engaging recess 90a of the shaft member 90 to fix the shaft. And is rotatably supported in the case body 81.

On the other hand, on the case body 81, traveling wheels 93, which are driven by traveling, are rotatably supported. Further, the traveling wheel 93 has a cylindrical shaft portion 94 formed to project substantially at the center. Further, a bearing portion 95 is formed below the shaft member 90 of the drum body 84 on the side surface of the case body 81 in the traveling direction, and the bearing portion 95 projects laterally in a cylindrical shape. Then, the shaft portion 94 of the traveling wheel 93 is rotatably fitted into the bearing portion 95 of the case body 81 to rotatably support the traveling wheel 93.

[0005]

By the way, recent electric vacuum cleaners have been equipped with an electric blower 82 or this electric blower 82 in order to meet the demand for downsizing in order to improve the cleaning workability and reduce the storage space. A drum body 84 for winding a power cord 83 for supplying electric power is arranged by making the most of the space. In addition, there is a demand to increase the size of the traveling wheels 93 in order to improve the running performance of the vacuum cleaner and the appearance of the vacuum cleaner.

Since the shaft portion 94 of the traveling wheel needs to be rotatably supported, the drum body 84 and the electric blower 82
It is necessary to provide a predetermined space for shaft support so as not to interfere with other parts such as.

However, in the conventional electric vacuum cleaner shown in FIG. 5, the tip projects from the rib portion 91 from the engaging recess 90a engaged with the rib portion 91 of the shaft member 90 of the drum body 84. However, if the traveling wheel 93 is enlarged so that the tip and the shaft portion 94 of the traveling wheel 93 do not interfere with each other, the height of the electric vacuum cleaner is increased due to the larger diameter of the traveling wheel, and the electric vacuum cleaner is There is a problem of upsizing.

The present invention has been made in view of the above problems, and can be miniaturized even if the traveling wheel and the drum body for winding and storing the power cord coaxially come close to each other as the traveling wheel becomes larger. The purpose is to provide a vacuum cleaner.

[0009]

The electric vacuum cleaner of the present invention comprises:
A case body for accommodating an electric blower and having a support wall portion, a drum body for winding up and accommodating a power cord, a drum body rotatably supported on the case body, and an end portion engaged with the support wall portion. A shaft member provided with an engagement recess having a small diameter to be fitted, a traveling wheel that is driven as the vehicle travels, and a shaft portion that rotatably supports the traveling wheel on the case body. The shaft is formed with a cylindrical portion provided with an insertion portion into which a tip portion is inserted from an engaging recess engaged with the support wall portion of the shaft member, and the shaft member is substantially coaxial with the cylindrical portion. It is located.

[0010]

In the vacuum cleaner of the present invention, the drum body for winding up and storing the power cord for supplying the electric power to the electric blower is provided at the supporting wall portion of the case body at the end portion of the shaft member and has a small diameter engagement. The recess is engaged to rotatably support the shaft, and the tip of the engagement recess is coaxially positioned within the insertion portion of the cylindrical shaft that rotatably supports the running wheel on the case body. Due to
Even if the traveling wheel and the drum body are coaxially close to each other, the shaft member and the shaft portion do not interfere with each other, and the widthwise dimension of the case body becomes smaller and the height dimension becomes smaller, so that the case body can be downsized. .

[0011]

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

1 and 2, reference numeral 1 denotes a vacuum cleaner body, which 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. It is composed of a main body case 2 as a case body having an open front side upper surface portion, and a lid body 3 for opening and closing the front side upper surface portion opening of the main body case 2. The body case 2 has a swivel wheel 4 attached to the lower surface of the front side so as to be swivelable. Further, a handle 5 is provided on the upper portion of the main body case 2 so as to be slidable in the vertical direction, and an accessory storage portion 6 for accommodating accessories (not shown) is provided behind the handle 5.

Reference numeral 7 is a driven rear wheel as a traveling wheel. As shown in FIGS. 1 and 3, the driven rear wheel 7 has an annular tire portion 8 made of rubber or the like fitted and fixed to the outer peripheral edge thereof. Shaft portion 9 formed in a disc shape and projecting substantially perpendicularly to the center
Are integrally formed. In addition, the shaft portion 9 is formed with a cylindrical cylindrical portion 11 having an insertion portion 10 on the central axis, and a claw portion 12 protruding in the outer peripheral direction is formed at the tip edge of the cylindrical portion 11. There is.

On the other hand, on both side surfaces of the main body case 2 in the traveling direction of the vacuum cleaner main body 1, a shaft portion 9 of the driven rear wheel 7 is substantially vertically cylindrical toward the side where the shaft portion 9 is rotatably fitted and supported. The wheel-shaped wheel receiving portion 14 is formed to project.

Then, the shaft portion 9 of the driven rear wheel 7 is inserted into the wheel receiving portion 14 of the body case 2, and the claw portion 12 of the shaft portion 9 is locked to the edge portion of the base end of the wheel receiving portion 14. Are rotatably fitted and the driven rear wheel 7 is rotatably supported.

On the other hand, in the vacuum cleaner main body 1, a dust collection chamber 18 whose upper side is opened by a partition wall 17 having a grid-like communication port 16 is formed at the front side in the traveling direction of the vacuum cleaner main body 1. At the same time, the electric blower chamber 19 is formed behind the dust collection chamber 18. And in the dust collection chamber 18,
A dust bag 22 is detachably mounted by a holder 21 pivotally mounted in the dust collection chamber 18.

Further, an auxiliary dust collecting filter 23 which covers the communication port 16 is detachably attached to the front surface of the partition wall 17.
The dust collecting bag 22 and the auxiliary dust collecting filter 23 are attached and detached via the upper opening of the dust collecting chamber 18.

On the other hand, in the electric blower room 19, an electric blower is installed.
25 are arranged. The electric blower 25 is composed of an electric portion 26 (not shown) for driving a fan to rotate around 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 section 26.

A motor head 30 in which a bearing for supporting a shaft (not shown) for rotationally driving the fan is provided is formed at the rear end surface of the electric section 26 so as to project rearward in a cylindrical shape.

An annular rubber support 31 is fitted to the outer peripheral edge of the front end of the electric blower 25, and a rubber shock absorber 32 is attached to the motor head 30 of the rear end. 30
It is attached to cover.

On the other hand, on the lower surface of the upper case 2b, an upper rib front portion 34 which projects downward and whose lower end portion is formed in a concave arc shape along the outer peripheral surface of the fan cover 27, and this upper rib front portion The upper rib rear portions 35, which are positioned rearward of the rear portion 34 and project downward substantially in parallel, and whose lower end portions are formed in a concave arc shape along the outer peripheral surface of the motor head 30 of the electric portion 26, are formed.

Further, on the upper surface of the lower case 2a, the upper rib front portion 34 and the upper rib rear portion 35 are opposed to each other and project upward, and the upper end portion is formed in a concave arc shape along the outer peripheral surface of the fan cover 27. A lower rib front portion 36 formed on the above 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 motor head 30 of the electric portion 26 are formed to project.

The shock absorber 32 mounted so as to cover the motor head 30 of the electric blower 25 is provided at the rear portion 3 of the upper and lower ribs.
The rear ends of the electric blower 25 are sandwiched and fixed by the upper and lower rib rear portions 35 and 37 via the buffer 32.

Further, the outer peripheral surface of an annular rubber support 31 fitted to the front end of the electric blower 25 is clamped and fixed by the upper and lower rib front portions 34 and 36, and the front end of the electric blower 25 is supported by the rubber support.
The upper and lower rib front portions 34 and 36 are sandwiched and fixed via 31.

The front end side of the electric blower 25 is provided with a rubber support 31 which communicates with a dust collecting chamber 18 provided with a dust collecting bag 22 for collecting the dust sucked by the intake port 28 of the electric blower 25 together with the air. 16 communicates airtightly.

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

Further, as shown in FIGS. 1 and 3, the electric vacuum cleaner body 1 is located on the left side in the traveling direction of the electric blower chamber 19 and projects relative to the upper and lower cases 2a and 2b. A drum chamber 44 is defined by the upper and lower partition walls 42 and 43. Then, in the drum chamber 44, the electric blower 25
A drum body 47 around which a power cord 46 that supplies power to
Is provided.

The drum body 47 is provided with a cylindrical shaft support portion 49, and a disc-shaped wheel portion 50 is formed on the outer peripheral surface of the shaft support portion 49 so as to project in a direction substantially perpendicular to the axial direction. ing. Further, on the outer peripheral edge of the wheel portion 50, there is integrally formed a winding portion 51 having an annular cross-section having a concave cross section around which the power cord 46 is wound, and the drum body 47 has a disc shape. Is formed in.

Further, a winding means 53 such as a mainspring coil for winding the power cord 46 drawn out to the winding portion 51 is provided on one surface side of the drum body 47, and the drum body 47 is provided on the other surface side. A bearing portion 54 is provided for mounting the inside of the drum chamber 44.

Then, a shaft member 55 having an engaging recess 55a in the shape of a groove having a small diameter is formed rotatably in the shaft support 49 of the drum body 47 on the peripheral surface in the vicinity of one end. The other end of
A shaft member 55 is axially fixed to the bearing portion 54, and a shaft member 55 is attached so that the drum body 47 and the bearing portion 54 rotate relative to each other.

On the other hand, the upper partition wall portion 42 formed so as to project downward on the lower surface of the upper case 2b is formed in a wall shape along the traveling direction of the electric vacuum cleaner, and the lower end portion thereof is the outer peripheral surface of the bearing portion 54. Is formed in a concave arc shape. In addition, the lower case
An upper end of the lower partition wall portion 43, which is opposed to the upper partition wall portion 42 toward the upper partition wall portion 42 and protrudes upward, is formed in a concave arc shape along the outer peripheral surface of the bearing portion 54.

Further, the upper and lower case portions 2a and 2b are provided with upper and lower shaft support wall portions 57 and 58 as support walls which project in a wall shape substantially parallel to the upper and lower partition wall portions 42 and 43 and partition the drum chamber 44. Formed,
Each tip is formed in a concave arc shape so as to engage with an engaging recess 55a formed at one end of a shaft member 55 fitted to the shaft support 49 of the drum body 47.

The bearing 54 is sandwiched between the upper and lower partition walls 42 and 43, and the side of the shaft member 55 where the engagement recess 55a is formed is the side of the driven rear wheel 7 axially supported by the body case 2. The engagement recesses are engaged and pinched and fixed by the vertical shaft support walls 57 and 58 so that the drum body 47 is positioned substantially in the center so as not to come into contact with the inside of the insertion portion 10 of the shaft portion 9. It is rotatably supported inside.

The other end of the power cord 46 having a plug (not shown) at one end is electrically and mechanically attached to the winding portion 51 of the drum body 47, and the electric blower is provided through the bearing portion 54. 25 can be powered.

The lid 3 has a rear end pivotally attached to the upper case 2b and covers the dust collecting chamber 18 so as to be openable and closable from above. A suction part 61 is provided substantially in the center of the front side of the lid body 3. The suction part 61 has an inner opening 62 and an outer opening.
63 and 63 are formed to face each other. Also, the inner opening 62
A cylindrical suction port 64 is formed in the middle opposite to the outer opening 63. A front portion of the suction port 64 is opened to the front of the electric vacuum cleaner body 1, and a rear portion thereof is opened to the dust collecting chamber 18.

A shutter 65 is slidably supported on the suction portion 61 so as to openably and closably close a suction port 64 for communicating the dust collection chamber 18 with the outside of the vacuum cleaner body 1.

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

During normal cleaning, the lid 3 is closed,
Power is supplied from the power cord 46 drawn from the drum body 47, and the shutter 65 is slid to open the suction port. With the shutter 65 open, a hose body (not shown) is connected for cleaning. The electric blower 25 is driven by the electric power supplied from the power cord 46, and the dust is sucked together with the air from the suction port 64 via the hose body by the drive, and is guided to the dust collection chamber 18 of the electric vacuum cleaner body 1. It is captured in the dust bag 22.

The air filtered by the dust collecting bag 22 is supplied to the auxiliary dust collecting 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,
Through the exhaust chamber 39 in order, from the exhaust port 40 to the vacuum cleaner body 1
It is exhausted to the outside air as exhaust air.

When the electric vacuum cleaner body 1 is stored, a stop release button (not shown) is operated to rotate the drum body 47 by the winding means 53 to wind the power cord 46 around the winding portion 51 and store it. Then, the hose body is removed, and the shutter 65 is slid to close the suction port 64. Further, used accessories (not shown) are stored in the accessory storage portion 6 on the upper part of the main body case 2.

In the above embodiment, the driven rear wheel 7 is integrally formed with the cylindrical shaft portion 9 having the insertion portion 10 on the central axis so that the shaft portion 9 has the cylindrical shape of the main body case 2. It is rotatably fitted to the wheel receiving portion 14 and supports the driven rear wheel 7 rotatably. On the other hand, while the bearing portion 54 of the drum body 47 is sandwiched between the upper and lower partition wall portions 42 and 43 of the main body case 2,
The side of the shaft member 55 on which the engagement recess 55a is formed is vertically positioned so as not to come into contact with the inside of the insertion portion 10 of the shaft portion 9 of the driven rear wheel 7 pivotally supported by the main body case 2. The engagement recess 55a is engaged and sandwiched and fixed by the shaft support walls 57 and 58, and the drum body 47 is rotatably supported in the drum chamber 44.

Therefore, when the electric vacuum cleaner body 1 travels,
The shaft portion 9 that rotates with the driven rear wheel 7 is arranged so that one end of the shaft member 55 that rotatably supports the drum body 47 facing the shaft portion 9 does not come into contact with the insertion portion 10 of the shaft portion 9. Therefore, it does not interfere with the shaft member 55 that is coaxially opposed, and the rotation of the driven rear wheel 7 is not hindered. Since one end of the shaft member 55 is located inside the insertion portion 10 of the shaft portion 9, the width dimension of the electric vacuum cleaner body 1 can be reduced by this overlapping dimension, and the electric vacuum cleaner body 1 can be miniaturized.

Further, since the shaft portion 9 and the shaft member 55 can be arranged coaxially so as to overlap with each other, the mounting position of the driven rear wheel 7 is not limited as in the conventional case, and the driven rear wheel 7 is not restricted.
The degree of freedom in designing the electric vacuum cleaner body 1 can be improved by increasing the diameter of the electric vacuum cleaner.

Next, another embodiment will be described with reference to FIG.

The embodiment shown in FIG. 4 is similar to that shown in FIGS.
Instead of the vertical shaft support wall portions 57 and 58 shown in the embodiment of the present invention, a locking portion 71 having an L-shaped cross section toward the inner surface of the body case 2 in the vicinity of the peripheral edge of the wheel receiving portion 14 of the body case 2. Is formed in a protruding manner, and further, the engaging portion 72 whose peripheral edge is locked to the engaging portion 71.
The shaft support wall body 73 having the above is provided so as to cover the wheel receiving portion 14 from the inside. Then, a through hole 75 is formed substantially in the center of the shaft supporting wall portion 73, and the shaft member 55 of the drum body 47 is formed in the through hole 75.
Of the engaging recess 55a is engaged with the engaging recess 55a, and the tip side of the engaging recess 55a is rotatably supported in the insertion portion 10 of the shaft portion 9 so that the shaft portion 9 and the shaft member 55 rotate without interfering with each other. Freely supported.

The embodiment shown in FIG. 4 is also shown in FIGS.
Similarly to the embodiment shown in FIG. 7, the shaft portion 9 and the shaft member 55 do not interfere with each other, so that the degree of freedom in designing the vacuum cleaner body 1 can be improved and the vacuum cleaner body 1 can be downsized.

[0047]

According to the electric vacuum cleaner of the present invention, the drum body for winding and storing the power cord for supplying the electric power to the electric blower is provided at the end of the shaft member at the supporting wall of the case body. The small engaging recess is engaged to rotatably support the shaft, and the tip of the engaging recess is coaxially inserted into the insertion portion of the cylindrical shaft that rotatably supports the running wheel on the case body. Even if the traveling wheel and the drum body are coaxially close to each other, the shaft member and the shaft portion do not interfere with each other, and the width dimension of the case body can be reduced and the height dimension can be reduced. Can be downsized.

[Brief description of drawings]

FIG. 1 is a side sectional view along an advancing direction showing an embodiment of an electric vacuum cleaner of the present invention.

FIG. 2 is a front sectional view taken along the width direction of the same electric vacuum cleaner body.

FIG. 3 is a cross-sectional view for explaining a situation in which the driven rear wheel and a drum body are axially supported.

FIG. 4 is a cross-sectional view illustrating a pivotal support state between a driven rear wheel and a drum body according to another embodiment of the present invention.

FIG. 5 is a cross-sectional view illustrating an axial support state between a driven rear wheel and a drum body showing an example of a conventional electric vacuum cleaner.

[Explanation of symbols]

 1 Vacuum cleaner body 2 Body case as case body 7 Driven rear wheel as running wheel 9 Shaft part 10 Insert part 11 Cylindrical part 25 Electric blower 46 Power cord 47 Drum body 55 Shaft member 55a Engagement recess 57 Support wall part Upper support wall part as a support 58 Lower support wall part as a support wall

Claims (1)

[Claims] 1. A case body for accommodating an electric blower and having a supporting wall portion, a drum body for winding and accommodating a power cord, and a drum body rotatably supported by the case body and at the end portion thereof. A shaft member provided with a small-diameter engagement recess engaged with the support wall, a traveling wheel that is driven as the vehicle travels, and a shaft portion that rotatably supports the traveling wheel on the case body, The shaft portion is formed with a cylindrical portion having a central axis provided with an insertion portion into which a front end portion is inserted from an engaging recess engaged with the support wall portion of the shaft member, and the shaft member is provided in the cylindrical portion. An electric vacuum cleaner characterized in that is positioned substantially coaxially.