JPH0833593A - Electric vacuum cleaner - Google Patents

Abstract

PURPOSE:To facilitate the attachment of a cord wind device to a blower motor via a support, by attaching a cord wind frame to the periphery of the frame of the blower motor, also by providing the support as a rotary shaft, and by providing a brush, which is used for taking power from a power cord, on the support, on the side of a blower motor fan. CONSTITUTION:A support 7 is provided on the periphery of the frame 5 of a blower motor. The cord wind frame 10 of a cord wind device is attached to the support 7. A brush 3 for taking power from the power cord 9 of the cord wind device is provided on the support 7, on the side of a blower motor fan 6.

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 in which a cord winding device is concentrically provided on the outer periphery of a frame portion of a blower motor.

[0002]

2. Description of the Related Art Conventionally, a general blower motor / cord winding device separation type vacuum cleaner has a blower motor 32 fixed in a cleaner body 31 and a fan portion 33 of the blower motor 32 as shown in FIG. The cord winding device 34 is provided in parallel with the blower motor 32, and the motor frame 35 of the blower motor 32 is provided.
Is provided with an opening 35 for exhausting exhaust air after cooling the blower motor 32, and an opening is provided in an arrangement portion 36 of the cord winding device 34 so that the exhaust air from the opening 35 flows to the cord winding device 34. 37 was provided. In such an electric vacuum cleaner, since the cord winding device 34 is arranged in parallel with the blower motor 32, the size of the cleaner main body 31 becomes large.

Therefore, in order to reduce the size of the main body of the vacuum cleaner, there is an electric vacuum cleaner as disclosed in JP-A-53-53163, in which a cord winding device is provided so as to surround the outer periphery of the frame portion of a blower motor. It was

This electric vacuum cleaner will be described with reference to FIG. 10. A blower motor 39 is provided in the cleaner main body 38, and a cord winding device 41 is provided so as to surround the outer periphery of a motor frame 40 of the blower motor 39. A spiral spring 43 for driving the take-up device 41 so as to wind up the power cord 42 is provided in the front part of the blower motor 39, and one end of the spiral spring 43 is connected to the blower motor 39.
The other end is attached to the cord winding device 41, and the power cord 42 is attached to the rear part of the cord winding device 41.
By providing a brush 43 for receiving electric power from the blower motor 39, providing an opening 44 at the rear portion of the motor frame 40 of the blower motor 39, and exhausting the exhaust air from the fan of the blower motor 39 through the opening 44 through the inside of the motor case 43, The blower motor 39 was being cooled.

[0005]

The electric vacuum cleaner shown in FIG. 10 is provided with a brush portion on the side opposite to the fan, like a blower motor of a general electric vacuum cleaner, and a part of the brush portion is the blower motor. Since it projects from the motor frame, it was very difficult to attach the cord winding frame of the cord winding device at the time of assembly.

Further, since one end of the spiral spring for driving the cord winding device is attached to the blower motor, it is necessary to perform processing for attaching the spiral spring to the blower motor, and furthermore, the spiral spring was assembled at the time of assembling. Since it is necessary to assemble the cord winding device later, the cord winding device is very difficult to assemble, and it becomes difficult to repair if the one end of the spiral spring is removed after the assembly.

Regarding the cooling of the blower motor and the power cord that generate heat during use of the vacuum cleaner, the structure is the same as the conventional one, that is, the structure in which the exhaust air of the fan flows inside the motor frame to cool the blower motor. Because
When the exhaust passage from the blower motor fan is not sufficiently secured, a large loss occurs in the flow of air between the blower motor's intake port and the vacuum cleaner's exhaust port, resulting in a reduction in suction power and when the wind passes through narrow lanes. There is a problem that noise generated in the vacuum cleaner is generated, and the usability of the electric vacuum cleaner is adversely affected.

The electric vacuum cleaner according to the present invention has been made in view of the above problems. A cord winding frame is attached to the outer periphery of a frame portion of a blower motor and a support body serving as a rotary shaft is provided, and the blower motor of the support body is provided. Since the brush for taking in the power from the power cord is provided on the fan side, it is an object of the present invention to enable the cord winding device to be easily attached to the blower motor by the support.

[0009]

In order to achieve the above object, an electric vacuum cleaner according to the present invention is a vacuum cleaner in which a cord winding device is concentrically provided on an outer periphery of a frame portion of a blower motor. In the above, the cord winding frame of the cord winding device is attached to the outer periphery of the frame portion of the blower motor, and a support body serving as a rotation shaft of the cord winding frame is provided, and the cord is provided on the fan side of the blower motor of the support body. A brush for taking in power from the power cord of the winding device is provided.

According to another aspect of the vacuum cleaner of the present invention, the support is provided between the frame of the blower motor and a gap for guiding the exhaust air of the fan of the blower motor.

According to a third aspect of the vacuum cleaner of the present invention, a gap is formed inside the support for guiding the exhaust air, and ribs for fixing the support to the frame are formed parallel to the wind direction of the exhaust air. are doing.

According to a fourth aspect of the electric vacuum cleaner of the present invention, the cord winding frame of the cord winding device is attached to the outer periphery of the frame portion of the blower motor, and a support body serving as a rotary shaft of the cord winding frame is provided. A brush for taking in power from a power cord of the cord winding device is provided on the fan side of the blower motor of the support, and a spiral spring for driving the cord winding frame is provided at the rear of the support, One end of the spiral spring is attached to the support.

According to another aspect of the electric vacuum cleaner of the present invention, the cord winding frame of the cord winding device is attached to the outer periphery of the frame portion of the blower motor, and a support body serving as a rotary shaft of the cord winding frame is provided. A brush for taking in power from the power cord of the cord winding device is provided on the fan side of the blower motor of the support, and the exhaust air of the fan is blown on the fan side of the blower motor of the support to blower motor cooling air and power cord cooling air. A dividing wall is provided to divide the flow into.

[0014]

In the electric vacuum cleaner according to claim 1,
The cord winding device can be attached to the blower motor only by attaching the cord winding frame of the cord winding device to the support and providing the support on the frame portion of the blower motor. In the electric vacuum cleaner according to the second aspect, the exhaust air from the fan of the blower motor flows through the gap between the frame portion of the blower motor and the support to cool the blower motor. In the electric vacuum cleaner according to the third aspect of the present invention, the ribs that attach the support body to the frame portion of the blower motor with a gap therebetween rectify the exhaust air of the blower motor to reduce the air resistance.

In the vacuum cleaner according to the fourth aspect, the spiral spring can be easily attached to the rear portion of the support.

Further, in the electric vacuum cleaner according to the fifth aspect, the exhaust air of the fan of the blower motor is diverted to efficiently cool the power cords of the blower motor and the cord winding device, respectively.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the vacuum cleaner of the present invention will be described with reference to the drawings. FIG. 1 shows a cross-sectional view of a main part of an electric vacuum cleaner according to the present invention, in which an armature 1 and a commutator 2 are attached to an armature shaft, and a brush portion 3 passes through the commutator 2 and the armature 1 Power is supplied to the winding (not shown).

A stator 4 is embedded around the armature 1, and a fan portion 6 is provided so as to be in contact with the brush portion 3 which is surrounded by a motor frame 5. A support 7 which is a part of the cord winding device is fixed around the motor frame 5 with a rib 8 forming a gap with the outer periphery of the motor, and a power cord winding frame 10 around which a power cord 9 is wound. Is provided. The power cord winding frame 10 rotates about the support 7 as an axis.

A spiral spring 11 for winding is housed in association with the power cord winding frame 10, and the spiral spring 1
One end of the power cord winding frame 10 and the other end of the supporting body 7
It is fixed to the spring holding cover 12 and is housed by the spring pressing cover 12 to generate a rotational force. The power cord winding frame 10 is rotated by this rotating force to wind the power cord 9. The power cord winding frame 10 is provided with a slip ring 13 for taking in the power from the power cord 9, and the support 7
Power is taken in from the power receiving brush 14 provided in the above through a wire (not shown).

FIG. 2 is a front view of the support 7, and FIG. 3 is the support 7.
4 is a rear view of the support 7, and a flow dividing wall 15 for dividing the fan part exhaust air into the armature cooling air and the power cord cooling air is provided on the front surface. further,
Ribs 8 are provided for fixing the support 7 to the motor while ensuring a gap between the outer periphery of the motor frame 5 and the support 7 (the number of ribs is four in the drawing, but four). Not limited to.). The ribs 8 are formed in parallel with each other in the blowing direction, and rectify the wind from the fan unit 6. Then, a fixing groove 16 for the spiral spring 11 is provided at the rear portion of the support body 7, and one end of the spiral spring 11 is fixed therein.

FIG. 5 is a front view of the power cord winding frame 10, FIG. 6 is a sectional view of the power cord winding frame 10, and FIG. 7 is a rear view of the power cord winding frame 10. A slip ring 13 for taking in power is provided in front of the slip ring 13, and the slip ring 13 is connected to the power cord 9. Further, a cooling window 17 is provided as an air path for the power cord cooling air, and the wind from the fan unit 6 divided by the flow dividing wall 14 passes through the cooling window 17 to cool the power cord 9. Power cord winding frame 10
A cooling window 17 is provided in the rear part as in the front part.

A storage portion 18 for the spiral spring 11 is provided at the rear of the power cord winding frame 10. After the spiral spring 11 is stored, the spring holding cover 12 closes the opening of the spring storage portion 18. It is attached to the rear part of the power cord winding frame 10 in the state of being. The spring holding cover 12 is also provided with the cooling window 17 similar to the above.

FIG. 8 is a cross-sectional view showing the flow of cooling air in the main part of the electric vacuum cleaner. In the figure, the flow of exhaust air from the fan part of the blower motor is shown by arrows, and the fan part 6 of the blower motor is shown. The structure is such that the air taken in separately flows from the fan unit 6 to the motor side and the power cord side.
Since the air (exhaust air) exhausted from the fan unit 6 directly flows to the motor and the power cord 9, respectively.
And can be efficiently cooled separately with low temperature air.

In this way, when the motor and the power cord 9 are cooled separately, the motor temperature rises to 33 deg and the structure B rises as shown in the structure A (vacuum cleaner of the present invention) of FIG.
(Conventional electric vacuum cleaner shown in FIG. 10, a structure in which exhaust flows only in the motor case and cools only the motor as indicated by the arrow in FIG. 10) 32 deg and structure C (conventional electric vacuum cleaner shown in FIG. 11, As shown by the arrow in Fig. 11, the exhaust flowing in the motor case flows to the power cord side to cool the power cord.) The temperature rise (cooling effect) is almost equal to 31 deg, and the cord winding device of structure A ( The rise temperature of the power cord 9) is 25 deg.
The temperature rise is smaller than that of deg or 40 deg of Structure C, and the cooling effect is improved.

[0025]

In the vacuum cleaner according to the first aspect of the present invention, the cord winding device is attached to the support by simply attaching the cord winding frame of the cord winding device to the frame portion of the blower motor. Since it can be attached to the blower motor, the cord take-up device can be easily attached to the blower motor with a simple configuration in which the cord take-up frame is inserted from the rear without the power-supplying brush interfering with the attachment. In the electric vacuum cleaner according to claim 2, since the exhaust air from the fan of the blower motor flows through the gap between the frame portion of the blower motor and the support body to cool the blower motor, the blower motor can be cooled efficiently. Since the cord winding device is attached to the outer periphery of the blower motor, the temperature rise of the blower motor can be reliably prevented.
In the electric vacuum cleaner according to claim 3, the ribs for mounting the support member on the frame portion of the blower motor with a gap therebetween rectify the exhaust air of the blower motor to reduce the air resistance, so that cooling is performed more efficiently. In addition, it is possible to prevent the occurrence of turbulence and reduce noise.

Further, in the vacuum cleaner according to the fourth aspect, since the spiral spring is attached to the rear portion of the support,
The spiral spring can be easily attached from the rear, and moreover, since one end of the spiral spring is attached to the support, it is not necessary to provide the blower motor with the spiral spring attachment portion, and the configuration can be simplified. .

Further, in the electric vacuum cleaner according to the fifth aspect of the present invention, the exhaust air of the fan of the blower motor is diverted to cool the power cord of the blower motor and the power cord of the cord winding device, respectively. The blower motor and the power cord can be cooled with the air whose temperature has not risen, and the blower motor and the power cord can be efficiently cooled.

[Brief description of drawings]

FIG. 1 is a sectional view of a main part of a first embodiment of an electric vacuum cleaner according to the present invention.

2 is a front view of the support of FIG. 1. FIG.

3 is a cross-sectional view of the support of FIG.

4 is a rear view of the support of FIG.

5 is a front view of the power cord winding frame of FIG. 1. FIG.

6 is a cross-sectional view of the power cord winding frame of FIG.

7 is a rear view of the power cord winding frame of FIG. 1. FIG.

FIG. 8 is a cross-sectional view showing the flow of cooling air in the main part of the electric vacuum cleaner according to the present invention.

FIG. 9 is a characteristic diagram showing a temperature rise of a main part of the present invention and the conventional vacuum cleaner.

FIG. 10 is a partial cross-sectional view showing another example of the conventional electric vacuum cleaner.

FIG. 11 is a partial cross-sectional view showing a conventional general electric vacuum cleaner.

[Explanation of symbols]

 1 Armature 2 Commutator 3 Brush part 5 Motor frame 6 Fan part 7 Support 8 Rib 9 Power cord 10 Power cord winding frame 11 Spiral spring 15 Dividing wall 16 Groove for fixing spiral spring 11

Claims (5)

[Claims] 1. An electric vacuum cleaner in which a cord winding device is concentrically provided on the outer periphery of a frame portion of a blower motor, and the cord winding frame of the cord winding device is attached to the outer periphery of the frame portion of the blower motor, and the cord. An electric vacuum cleaner, comprising: a support body serving as a rotation shaft of a winding frame; and a brush for taking in power from a power cord of the cord winding device, the support body being provided on a fan side of the blower motor. 2. The electric vacuum cleaner according to claim 1, wherein the support body is provided with a gap formed between the support body and a frame portion of the blower motor to guide exhaust air of a fan of the blower motor. 3. A rib for fixing the support to the frame portion is formed parallel to the wind direction of the exhaust air by forming a gap for guiding the exhaust air inside the support. The electric vacuum cleaner described in 2. 4. An electric vacuum cleaner in which a cord winding device is concentrically provided on the outer periphery of a frame portion of a blower motor, and the cord winding frame of the cord winding device is attached to the outer periphery of the frame portion of the blower motor, and the cord. A support body serving as a rotation shaft of the winding frame is provided, and a brush for taking in power from the power cord of the cord winding device is provided on the fan side of the blower motor of the support body.
An electric vacuum cleaner, wherein a spiral spring for driving the cord winding frame is provided at a rear portion of the support, and one end of the spiral spring is attached to the support. 5. An electric vacuum cleaner in which a cord winding device is concentrically provided on the outer periphery of a frame portion of a blower motor, and the cord winding frame of the cord winding device is attached to the outer periphery of the frame portion of the blower motor, and the cord. A support body serving as a rotation shaft of the winding frame is provided, and a brush for taking in power from the power cord of the cord winding device is provided on the fan side of the blower motor of the support body.
An electric vacuum cleaner, characterized in that a flow dividing wall is provided on the fan side of the blower motor of the support to divide the exhaust air of the fan into a blower motor cooling air and a power cord cooling air.