JPH08280586A - Suction tool for vacuum cleaner - Google Patents

Abstract

PURPOSE: To vertically adjust the height of a suction port corresponding to the state of a floor surface properly and keep a rotary brush at the optimum state regardless of the state of the floor surface by a rotary brush and a front wheel appear and disappear against the lower case of a suction tool main body via the action of an operation piece. CONSTITUTION: When the floor surface to be cleaned is a wood floor or a straw mat, a lever 12 is moved backward (in the opposite direction to an arrow 13a), an operation piece 9 is moved in the same direction, cams 9a, 9b are made flush with the upper faces of pressing pieces 10a, 10b, and the lower sections of a front wheel 6 and a rotary brush 5 are made nearly flush with a lower case 3 in the retreated state. For cleaning a carpet, the lever 12 is moved forward (in the direction of the arrow 13a), the operation piece 9 is moved in the same direction, the cams 9a, 9b are slid forward along the upper faces of the pressing pieces 10a, 10b, and the lower sections of the front wheel 6 and rotary brush 5 are protruded downward from the lower case 3 via the springs 11a, 11b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction device for an electric vacuum cleaner, and more particularly to a suction device for an electric vacuum cleaner in which the height of the suction port can be appropriately raised or lowered depending on the condition of the floor surface.

[0002]

2. Description of the Related Art In recent years, suction tools for electric vacuum cleaners have been designed so that the height can be automatically changed according to the condition of the floor surface so that the floor surface being cleaned is hard, such as a wooden floor or tatami mat. In the case where a soft material such as a carpet is used in some cases, the suction port is kept away from the floor surface, and in many cases, the soft carpet is prevented from being adsorbed by the suction port. ing. As a suction tool of the vacuum cleaner that can automatically switch the height in this way,
For example, in the case of the suction tool of the vacuum cleaner of the type including the fixed brush, as shown in FIGS. 8 and 9, the suction port 4 is formed in the center of the lower suction tool member 3 of the suction tool body 1, and the suction port 4 is formed. Four
A front wheel 6 is provided in front of. Further, a cam 9 and a switching lever 10 are provided on the operator 9 provided above it, and a fixed brush 5a is provided behind the suction port 4.
Further, a rear wheel 7 is provided behind it. And
When the floor to be cleaned is hard, the front wheel 6 protruding from the lower suction member member 3 by dimension A has the suction port 4 when the floor to be cleaned is replaced by a soft material such as a carpet. In order to prevent the carpet or the like from adsorbing to the suction port 4, the switching lever 13a is moved in the direction of the arrow to move the actuator 9, thereby bringing the cam 9 into contact with the front wheel support 6a. The front wheel 6 is made to protrude further from the suction member member 2 by a dimension. In this way, the height of the lower suction member member 2 is adjusted from the floor surface to the dimensions A and A + a. In this way, the fixed brush 5a also rises from the floor surface, but even in this state, the efficiency of the brush is lowered because the tip of the fixed brush 5a is held in contact with the floor surface. There is no such thing.

As shown in FIG. 10, as a suction tool of a type that can improve the cleaning effect for cleaning a soft floor such as a carpet as compared with the suction tool main body 1 having the fixed brush, as shown in FIG. In the case of the suction tool main body 1 in which the rotating brush 5 is rotated by the motor housed in the lower part, thereby dust accumulated in the fibers of the carpet or the like is sucked out from the nozzle 1a together with the air, the aa sectional view of FIG. In Figure 1
1, the suction port 4 is opened on the lower surface of the lower case 3,
A rotary brush is provided at the center of the suction port 4, and the front wheel 6 and the rear wheel 7 are configured to rotate on the floor surface A.

However, in the suction tool body of the type having such a rotating brush, the front wheel 6 is made to protrude by moving the switching lever according to the state of the floor surface, like the fixed brush described above, so that the suction port 4 has the floor surface. When the height of the fixed brush 5 can be adjusted from the floor surface, the fixed brush 5 also rises above the floor surface, and accordingly, the rotating brush does not come into contact with the floor surface, resulting in a decrease in brush efficiency.

[0005]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art. Even when the front wheel projects from the suction member, the surface of the rotating brush does not separate from the floor surface. An object of the present invention is to provide a suction tool for an electric vacuum cleaner in which the efficiency of the rotary brush does not decrease.

[0006]

In order to solve the above-mentioned problems, the present invention comprises a suction port formed on the bottom surface of the lower case of the suction tool body, and a pressing piece provided on both sides of the center of the suction port at the upper end. A brush support, an elastic body sandwiched between the brush support and the lower case, a rotary brush whose both ends are supported by the brush support, a front wheel support having a pressing piece at an upper end, and the pressing An elastic body sandwiched between one piece and the lower case, a front wheel pivotally supported by the front wheel support, a lever is provided on one side, and a cam that abuts each of the pressing pieces is provided on the bottom of the other side. It is characterized in that it is composed of an operator slidable back and forth, and that the rotary brush and the front wheel can be retracted into and retracted from the lower case by the operation of the operator. In addition, an inclined portion that is inclined rearward is provided on one side of the pressing piece, and an inclined portion that corresponds to the inclined portion is provided on a lower surface of the cam. Further, the elastic body is composed of a spring. Furthermore, the lever is provided at the rear portion of the upper surface of the actuator.

[0007]

According to the above construction, the front wheel and the rotating brush protruding from the bottom surface of the suction tool lift the suction port of the electric vacuum cleaner from the floor surface, and prevent the soft floor surface such as a carpet from coming into close contact with the suction port. .

[0008]

An embodiment of the present invention will be described below with reference to the drawings. The same components as those in the conventional example are designated by the same reference numerals.

1 to 7, reference numeral 1 designates a suction tool body sandwiched by an upper case 2 and a lower case 3. Reference numeral 4 denotes a suction port opened on the bottom surface of the lower case 3, which is connected to a cleaner body (not shown) through a connection pipe 1a. 5
Is a rotary brush that is provided in the center of the suction port 4 and removes dust from the floor surface. Reference numeral 6 is a left and right front wheel provided in front of the suction port 4, and 7 is rotatably supported by a rear wheel support 8 provided behind the suction port 4, and together with the front wheel 6, a cleaner main body. Is a rear wheel that moves the vehicle on the floor. 9
Is an operator that presses the rotating brush 5 and the front wheel 6 from above and can freely retract from the lower case 3, and a lever 12 is provided on the rear upper surface.

Further, as shown in FIGS. 3 to 4, both ends 5a of the rotary shaft of the rotary brush 5 are supported by a brush support 5b, and the brush support 5b is provided at its upper end with an inclined portion from the front to the rear. The elastic member 11 is provided with the pressing piece 10b.
It is attached to both sides of the lower case 3 of the suction tool body 1 via b.

Further, as shown in FIGS. 5 and 6, the axles 6a of the left and right front wheels 6 are rotatably supported by the flanges 6c which hang down from both ends of the front wheel support 6b.
In b, a pressing piece 10a having an inclined portion provided from the front to the rear is provided at the upper end, and the suction tool body 1
It is attached to the center of the lower case 3.

Further, as shown in FIG. 7, the actuator 9 abuts on the bottom of the pressing piece 10a and presses the pressing piece 10a from above, and the cam 9b presses the pressing piece 10b from above. Is provided and is slidable back and forth along the bottom surface of the guide 2a provided on the lower surface of the upper case 2 as shown in FIGS.

The lever 12 is, as shown in FIG.
When pushed in the direction of b, the actuator 9 moves rearward, and the inclined portions of the cams 9a, 9b are pushed by the pushing pieces 10a,
10b, which matches the sloped portion of the elastic body 11a,
Since the pressing force of 11b is weakened, the front wheel 6 is housed inside the suction tool body 1 as shown in FIG. Therefore, the lower part of the front wheel 6 is substantially flush with the lower case 3, the rotating brush 5 is also housed in the suction tool body 1 as shown in FIG. 3, and the lower part of the rotating brush 5 is substantially the same as the lower case 3. It is configured to be located in the plane.

Further, the lever 12 has an arrow 13 shown in FIG.
When pushed in the direction of a, the actuator 9 moves forward, and as shown in the figure, the inclined portions of the cams 9a and 9b are pushed by the pressing pieces 10a and 1a.
Since it slides forward along the inclined portion of 0b and the pressing force of the elastic bodies 11a and 11b becomes stronger accordingly,
The front wheel 6 projects downward from the inside of the suction tool body 1 as shown in FIG. The rotating brush 5 is also configured to project downward from the suction tool body 1 as shown in FIG.

The operation of the suction tool body 1 configured as described above will be described below. First, as shown in FIG.
If the floor B being cleaned is a hard wooden floor or tatami mat, lever 1
2 is moved in the direction of arrow 13b (rearward), and the actuator 9 is moved rearwardly accordingly, and the cams 9a and 9b are
It coincides with the upper surfaces of the pressing pieces 10a and 10b. As a result, the front wheel 6 and the lower portion of the rotary brush 5 are substantially flush with the lower case 3, and the suction port 4 sucks the dust separated by the rotary brush 5 in the state of being close to the floor surface B.

From the above state, when the floor surface being cleaned is changed to a soft one like carpet A, lever 1
2 is moved in the direction of arrow 13a (forward), the operator 9 is moved forward accordingly, and the cams 9a and 9b are
Slide forward along the upper surfaces of the pressing tools 10a, 10b. Therefore, the springs 11a and 11b are pushed downward, and the front wheel 6 and the pressing piece 5 project downward from the bottom surface of the suction tool 1, so that the front wheel 6 and the pressing piece 5 lift the suction tool 1 upward, 4 is separated from the floor surface A, and a gap is created between the suction port 4 and the floor surface A. Therefore, a soft material such as the carpet A does not adsorb to the suction port 4.

[0017]

[Effect] As is clear from the above examples, the present invention is
When the floor surface is soft, such as a carpet, the front wheel and the rotating brush are projected downward from the lower case, and the suction tool mouth rises above the carpet by a predetermined distance. It is possible to prevent resistance and to prevent the suction tool body from being difficult to operate due to close contact with the suction port. Further, even if the suction tool body is lifted to a certain height from the carpet, since the rotary brush is in contact with the floor surface, the efficiency of the rotary brush does not decrease,
The suction tool of the electric vacuum cleaner having excellent operability can be realized.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a suction tool of an electric vacuum cleaner according to the present invention when the suction tool is on a hard floor surface.

FIG. 2 is a vertical cross-sectional view when the suction tool of the electric vacuum cleaner according to the present invention is on a soft floor surface.

FIG. 3 is a cross-sectional view of the suction tool of the vacuum cleaner according to the present invention in which the rotating brush portion is on a hard floor surface.

FIG. 4 is a vertical cross-sectional view when the rotary brush portion of the suction tool of the electric vacuum cleaner according to the present invention is on a soft floor surface.

FIG. 5 is a cross-sectional view of the suction tool of the vacuum cleaner according to the present invention when the front wheel portion is on a hard floor surface.

FIG. 6 is a vertical cross-sectional view when the front wheel portion of the suction tool of the electric vacuum cleaner according to the present invention is on a soft floor surface.

FIG. 7 is a perspective view of an actuator of the suction tool of the electric vacuum cleaner according to the present invention.

FIG. 8 is a vertical cross-sectional view of a suction tool of an electric vacuum cleaner including a conventional fixed brush.

FIG. 9 is a cross-sectional view of a suction tool of a vacuum cleaner including a conventional fixed brush.

FIG. 10 is a plan view in which a suction tool of a vacuum cleaner including a conventional rotating brush is partially cut away.

FIG. 11 is a vertical cross-sectional view of a main part of a suction tool of an electric vacuum cleaner including a conventional rotating brush.

[Explanation of symbols]

 1 Suction Tool Main Body 1a Connection Pipe 2 Upper Case 3 Lower Case 4 Suction Path 5 Rotating Brush 6 Front Wheel 7 Rear Wheel 8 Rear Wheel Support 9 Actuator 9a Cam 9b Cam 10a Pushing Piece 10b Pushing Piece 11a Elastic Body 11b Elastic Body 12 Lever 13a arrow 13b arrow

Claims (4)

[Claims] 1. A suction port formed on a bottom surface of a lower case of a suction tool body, a brush support provided on both sides of a center of the suction port and having a pressing piece at an upper end, the brush support and the lower case. An elastic body sandwiched between, a rotating brush whose both ends are supported by the brush support, a front wheel support body having a pressing piece at an upper end, an elastic body sandwiched between the pressing piece and the lower case, A front wheel axially supported by the front wheel support, a lever provided on one side, a cam that abuts the pressing pieces on the bottom of the other side, and an actuator that is slidable forward and backward, A suction tool for an electric vacuum cleaner, wherein the rotary brush and the front wheel are retractable from the lower case by operating the actuator. 2. The inclined portion that is inclined rearward is provided on one side of the pressing piece, and the inclined portion corresponding to the inclined portion is provided on the lower surface of the cam. Vacuum cleaner suction tool. 3. The suction tool for an electric vacuum cleaner according to claim 1, wherein the elastic body is a spring. 4. The suction device for a vacuum cleaner according to claim 1, wherein the lever is provided at a rear portion of an upper surface of the actuator.