Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Reexamination Certificate
2002-01-15
2004-07-06
Till, Terrence R. (Department: 1744)
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
C015S389000
Reexamination Certificate
active
06757934
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a suction head with a power brush that rotatively contacts objects to be cleaned and separates alien substances from the objects to be cleaned, and more particularly, to a suction head of a vacuum cleaner for cooling an operating device arranged in the power brush.
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 in the suction head includes a cleaner body
100
, 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
105
longitudinally connected from the cleaner body
100
and operating as a path, through which the alien substances are sucked up into, and a suction head
110
connected to the end of the connecting tube
105
so that the alien substances can be sucked up into the suction head
110
in a state where the suction head
110
contacts the objects to be cleaned.
In particular, a power brush
121
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
110
.
FIGS. 2 and 3
are horizontal and vertical sectional views showing the suction head according to a conventional technology.
Referring to
FIGS. 2 and 3
, the suction head of the vacuum cleaner according to the conventional technology includes a head case
111
, in which a suction hole
116
for sucking up the alien substances is formed on the bottom and a connecting part
113
is formed in the hind portion so that the cleaner body
100
of
FIG. 1
can be connected, the power brush
121
rotatably installed in the head case
111
, the power brush
121
for rotatively contacting the objects to be cleaned and removing the alien substances, and a rotary operating unit
131
arranged in the power brush
121
, the rotary operating unit
131
for rotatively operating the power brush
121
.
A first supporting shaft
112
and a second supporting shaft
114
are installed on both inner walls of the head case
111
so as to rotatably support both ends of the power brush
121
.
A plurality of inlets
115
are formed in the head case
111
, in which the first supporting shaft
112
is installed, so that outside air can be blown into the head case. The first supporting shaft
112
is formed to be a tube so that air can be blown thereinto.
The power brush
121
includes a cylindrical body part
122
and a brush
124
installed on the outer surface of the body part
122
to protrude along the direction of the radius of the body part
122
.
The rotary operating device
131
includes an electric motor
133
whose rotary shaft is arranged along the direction of the first supporting shaft
112
in the end of the first supporting shaft
112
and a decelerator
135
having a predetermined deceleration ratio, whose one end is combined with the rotary shaft of the electric motor
133
and the other end is connected to the body part
122
, to thus transmit the rotary power of the electric motor
133
to the body part
122
.
The electric motor
133
and the decelerator
135
are formed to have an outer diameter smaller than the inner diameter of the body part
122
so that a channel, through which air flows, can be formed between the outer diameter surfaces of the electric motor
133
and the decelerator
135
and the inner diameter surface of the body part
122
. A discharge hole
126
is formed behind the decelerator
135
in the body part so that air blown into the body part
122
through the inlets
115
can be discharged into the outside of the power brush
121
.
A filter
128
is installed in the discharge hole
126
so that the alien substances such as blown from the outside can be filtered.
In the vacuum cleaner with the power brush according to the conventional technology, when power is applied to the fan motor assembly of the cleaner body
100
, suction force is generated in the head case
111
. The alien substances existing in the objects to be cleaned are sucked up into the suction hole
116
together with peripheral air.
When the power is applied to the electric motor
133
of the rotary operating device, the rotary power of the electric motor
133
is transmitted to the body part
122
through the decelerator
135
. The body part
122
rotatively contacts the objects to be cleaned while rotating centering on the first and second supporting shafts
112
and
114
, to thus remove the alien substances from the objects to be cleaned.
When the suction force for sucking up the alien substances is generated in the head case
111
, the suction force operates in the power brush
121
through the discharge hole
126
. The outside air is sucked up into the head case
111
through the inlets
115
of the head case
111
due to the suction force.
Thus sucked up air is blown into the body part
122
through the first supporting shaft
112
, to thus cool the electric motor
133
and the decelerator
135
, and is discharged into the inside of the head case
111
through a through hole
129
and the discharge hole
126
. The air discharged into the inside of the head case
111
is sucked up into the cleaner body together with the sucked up air and the alien substances through the suction hole
116
of the head case
111
.
However, in the suction head of the vacuum cleaner with the power brush according to the conventional technology, since the electric motor
133
is combined with one side of the first supporting shaft
112
and the decelerator
135
is combined with the output shaft of the electric motor
133
, the structure of the suction head is complicated. Also, since the electric motor
133
and the decelerator
135
are hold in the housings, respectively, small areas of the electric motor
133
and the decelerator
135
contact an air. Accordingly, the rotary operating device cannot be effectively cooled.
Since the channel, through which the air passes, is formed between the internal diameter of the body part
122
of the power brush
121
and the housings of the electric motor
133
and the decelerator
135
, it is significantly restricted to appropriately design the size of the electric motor
133
and the air flow channel.
Since the outside air is sucked up into the power brush
121
using the suction force generated in the head case
111
by the fan motor assembly of the cleaner body
100
, to thus cool the rotary operating device, suction loss of the fan motor assembly of the cleaner body occurs, to thus deteriorate a cleaning performance.
SUMMARY OF THE INVENTION
Therefore, an object of the present invention is to provide a suction head of a vacuum cleaner, which is capable of effectively cooling an operating device arranged in a power brush and of reducing suction loss of the vacuum cleaner, to thus improve a cleaning performance.
To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided a suction head of a vacuum cleaner, comprising a head case connected to a cleaner body 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, the power brush for removing alien substances, a supporting shaft fixed to the head c
Fleshner & Kim LLP
LG Electronics Inc.
Till Terrence R.
LandOfFree
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