Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Reexamination Certificate
2002-01-15
2004-08-10
Till, Terrence R. (Department: 1744)
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
C015S380000, C015S392000
Reexamination Certificate
active
06772476
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a suction head of a vacuum cleaner, and more particularly, to a suction head of a vacuum cleaner with a power brush that rotatively contacts objects to be cleaned and separates alien substances from the objects to be cleaned, to thus let the vacuum cleaner easily suck up the alien substances.
2. Description of the Background Art
In general, vacuum cleaners perform cleaning by collecting alien substances such as dust, which exist in objects to be cleaned, through strong suction force generated by the operation of a fan motor assembly.
Among such vacuum cleaners, there exists a vacuum cleaner with a power brush referred to as an agitator and positioned in a suction head, which rotatively contacts the objects to be cleaned and separates the alien substances from the objects to be cleaned, to thus let the vacuum cleaner easily suck up the alien substances from the objects to be cleaned. Accordingly, it is possible to improve a cleaning performance.
As shown in
FIG. 1
, the vacuum cleaner with the power brush includes a cleaner body
1
, in which a fan motor assembly for generating suction force so as to suck up the alien substances such as dust, which exist in the objects to be cleaned, is loaded, a connecting tube
5
longitudinally connected from the cleaner body
1
and operating as a path, through which the alien substances are sucked up into, and a suction head
10
connected to the end of the connecting tube
5
so that the alien substances can be sucked up into the suction head
10
in a state where the suction head
10
contacts the objects to be cleaned.
In particular, a power brush
20
rotatively contacting the objects to be cleaned, the power brush
20
for separating the alien substances existing in the objects to be cleaned from the objects is installed In the suction head
10
.
The structure of the suction head with the power brush will now be described with reference to FIG.
2
.
The suction head
10
includes a head case
11
, which is connected to the connecting tube
5
shown in FIG.
1
and in which a suction hole
15
for sucking up the alien substances is formed on the bottom, the power brush
20
rotatively contacting the objects to be cleaned since some of the power brush
20
protrude from the inside of the head case
11
to the outside through the suction hole
15
, rotation shafts
25
rotatably installed in the head case
11
, the rotation shafts
25
for supporting the power brush
20
, an electric motor
30
fixed in the head case
11
, the electric motor
30
for rotatively operating the power brush
20
by rotating the rotation shafts
25
.
The power brush
20
is cylindrical. The rotation shafts
25
are fixed to both center portions of the power brush
20
. Brushes
22
spirally arranged with respect to the direction of the rotation shafts
25
so as to contact the objects to be cleaned are installed on the outer circumference of the power brush
20
.
The electric motor
30
are fixed to be parallel to the power brush
20
and the rotation shafts
25
in the head case
11
. Pulleys
33
and
34
are included in the shaft
31
of the electric motor
30
and the rotation shaft
25
, respectively. The pulleys are mutually connected to a belt
35
, to thus transmit the operating power generated by the electric motor
30
to the power brush
20
.
In the vacuum cleaner with the power brush according to a conventional technology, having the above structure, when the fan motor assembly in the cleaner body
1
operates, suction force is generated in the head case
11
of the suction head
10
. At this time, the alien substances such as dust existing in the objects to be cleaned are sucked up through the suction hole
15
of the head case
11
.
When power is applied to the electric motor
30
in the suction head
10
, the power brush
20
rotates. The rotating power brush
20
rotatively contacts the objects to be cleaned and separates the alien substances from the objects to be cleaned. The separated alien substances are sucked up through the suction hole
15
by the suction force generated in the cleaner body
1
.
In the suction head of the vacuum cleaner with the power brush according to the conventional technology, since the electric motor
30
is installed outside the power brush
20
in order to rotate the power brush
20
, a space for installing the electric motor
30
is required in the suction head
10
. Accordingly, the size of the suction head
10
becomes relatively larger.
In the suction head of the vacuum cleaner with the power brush according to the conventional technology, since the operating power of the electric motor
30
is transmitted to the power brush
20
by the belt
35
, when the vacuum cleaner is used for a long time, the belt
35
can become loose and the power brush
20
is not smoothly rotated. Accordingly, efficiency of cleaning deteriorates.
In particular, in the suction head of the vacuum cleaner with the power brush according to the conventional technology, since the power brush contacts the objects to be cleaned, to thus separate the alien substances from the objects to be cleaned, only in the direction, where the power brush rotates, the alien substances attached to the objects to be cleaned are not effectively removed. Accordingly, it is restricted to improve a cleaning performance.
SUMMARY OF THE INVENTION
Therefore, an object of the present invention is to provide a suction head of a vacuum cleaner with a power brush, which is capable of being compactly designed by installing a motor for providing operating power to the power brush in the power brush, to thus reduce the size of the suction head.
Another object of the present invention is to provide a suction head of a vacuum cleaner with a power brush, which is capable of improving a cleaning performance by letting the power brush be in a linear motion as well as in a rotary motion, to thus improve ability of separating the alien substances from the objects to be cleaned.
To achieve these and other advantages and in accordance with the purposes of the present invention, as embodied and broadly described herein, there is provided a suction head of a vacuum cleaner with a power brush, comprising a head case connected to a cleaner body through a connecting tube and having a suction hole on the bottom, a power brush positioned in the head case, some part of which protrudes outward the head case through the suction hole, to thus contact objects to be cleaned, supporting means fixed to the head case, the supporting means for supporting the power brush to be in a rotary motion and in a linear motion, a moving frame and a fixed frame formed to be cylindrical and fixed to the power brush and the supporting means in the power brush, and a two degree-of-freedom motor installed to correspond to the moving frame and the fixed frame, the two degree-of-freedom motor for rotatively operating and linearly moving the power brush.
The two degree-of-freedom motor comprises a rotary operating part for rotatively driving the power brush due to a mutual operation between a rotary operating magnet installed in the moving frame and a rotary operating coil installed in the fixed frame and a linear operating part for linearly operating the power brush due to a mutual operation between a linear operating magnet installed in the moving frame and a linear operating coil installed in the fixed frame.
Elastic means for providing elasticity are installed between the power brush and the head case so as to generate power corresponding to operating power of the linear operating part.
The rotary operating coil and the linear operating coil are installed in the fixed frame fixed to the supporting means and the rotary operating magnet and the linear operating magnet are installed in the moving frame fixed to the power brush.
The moving frame having two supporting portions of a double cylindrical structure is fixed to the power brush and the fixed frame is fixed to the supporting means so that some part of the fixed fram
Fleshner & Kim LLP
LG Electronics Inc.
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