JP2000325273A - Electric vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric vacuum cleaner with which power consumption is reduced, dust transferring ability is improved and a sucker is hardly sucked on the floor surface. SOLUTION: This electric vacuum cleaner has the sucker forming air passages 15a and 15b before and behind a suction port 12 on the base of a main body 11 of sucker and a motor-driven air blower for operating suction power to the sucker while having plural high and lower output modes. In the low output mode of the motor-driven air blower, the air passage 15a or 15b on the reverse side of the advancing direction of the sucker is formed with a smaller passage area or greater passage resistance than the side of the advancing direction and in the high output mode of the motor-driven air blower, the air passage 15a or 15b on the inverse advancing direction side of the sucker is formed with a larger passage area or smaller passage resistance than the low to output mode.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner used in a general household or the like.

[0002]

2. Description of the Related Art FIGS. 11 and 12 show examples of a suction tool in a conventional vacuum cleaner.

[0003] In FIG. 11, reference numeral 1 denotes a suction tool main body, which has a suction port 2 on a bottom surface, and an air passage 5 a formed by a bottom surface of the suction tool body 1 and a floor surface 4 in front of and behind the suction port 2.
5b are formed.

[0004] Reference numerals 3a and 3b denote wheels for moving the suction tool. Reference numeral 6 denotes a connecting pipe to the cleaner body side. The connecting pipe 6 is not shown but is connected to the cleaner via an extension pipe, a hose or the like. When suction force is applied by an electric blower connected to the main body and provided in the cleaner body, air around the suction tool main body 1 is sucked into the suction port 2 through the air passages 5a and 5b, and dust is removed from the air. The air is sucked into the suction port 2 together with the suction air.

Further, as shown in FIG. 12, there is a type in which a flexible lip 7 whose one end is in contact with the floor surface 4 is provided at the rear of the suction port 2 to increase the suction capacity.

[0006]

In the conventional example shown in FIG. 11, air is always sucked from the air passages 5a and 5b in front of and behind the suction port 2 irrespective of the forward and backward movement of the suction tool body 1.

However, in actual cleaning work,
It is an operation to collect dust in front of the suction tool when the suction tool advances, and to collect dust behind when the suction tool moves backward. It is considered that the suction air from the reverse direction does not contribute to the collection of dust.

On the other hand, the above-mentioned suction air becomes a load on the electric blower and consumes electric power irrespective of its effectiveness for collecting dust, resulting in high power consumption.

Further, as shown in FIG. 12, in a system in which a lip 7 is provided behind the suction port 2 to increase the suction force,
When the lip 7 is not provided, the suction air dispersed in the air passages 5a and 5b is concentrated in the air passage 5a to increase the suction force against dust, and the above object can be effectively achieved. However, the suction tool easily sticks to the floor surface, making it difficult to operate. Further, when the suction tool is moved backward, there is a disadvantage that dust behind the suction tool is swept by the lip 7 and the dust cannot be sucked.

In view of the above problems, the present invention has low dust consumption performance in a low output mode while consuming less power, and has a high power output mode with excellent dust transfer capability in a hose.
Further, it is another object of the present invention to provide a vacuum cleaner in which the suction tool does not easily stick to the floor.

[0011]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention has a suction port on a bottom surface of a suction tool main body, and a gap between the bottom surface of the suction tool main body and a floor surface at least in the front-rear direction of the suction port. An air blower having an air passage formed therein, having a suction device capable of changing a passage area or a passage resistance of the air passage, having a suction force acting on the suction device and having a plurality of high and low output modes. When the output of the electric blower is in the low output mode, the air passage on the reverse side of the suction tool is formed to have a smaller passage area or a larger passage resistance than the advancement side, and the output of the electric blower is high output. In the mode, the air passage on the side opposite to the advancing direction of the suction tool is a vacuum cleaner having a larger passage area or a smaller passage resistance than in the low output mode.

According to the above configuration, when the output of the electric blower is in the low output mode, the amount of air suctioned from the reverse direction is reduced while the airflow from the direction of travel of the suction device is kept unchanged, thereby substantially reducing the amount of suction from the reverse direction. An energy-saving mode that reduces the power consumption of the electric blower without lowering the garbage collection capacity,
When the output of the electric blower is in the high output mode, the suction tool does not stick to the floor surface by forming a larger passage area or a smaller passage resistance of the air passage on the reverse side of travel than in the low output mode. At the same time, a high output mode with excellent trash transfer capability is provided.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION
A suction port is provided on a bottom surface of the suction tool main body, and an air passage is formed between the bottom surface of the suction tool main body and a floor surface at least in a front-rear direction of the suction port, and a passage area or a passage resistance of the air passage is varied. The electric blower has a suction device that can apply suction force to the suction device and has a plurality of high and low output modes, and when the output of the electric blower is in the low output mode, the suction device moves in reverse. When the output of the electric blower is in the high output mode, the air passage on the opposite side of the suction device is connected to the low output air passage by forming the air passage on the direction side to have a smaller passage area or a larger passage resistance than the traveling direction side. A vacuum cleaner with a larger passage area or smaller passage resistance than in the mode, and when the output of the electric blower is in the low output mode, the airflow from the suction tool traveling direction is not changed. By reducing the amount of air sucked in from the opposite direction, the power consumption of the electric blower is reduced without substantially lowering the dust collecting capacity. By making the passage area of the air passage on the reverse side to the traveling direction larger than that in the low output mode or making the passage resistance smaller, the suction tool does not stick to the floor surface, and at the same time, the cleaning device has excellent dust transfer ability. Machine.

According to a second aspect of the present invention, the passage area or the passage resistance of the air passage before and after the suction port is varied by vertically moving or rotating a passage shield provided before and after the suction port. The air passage can be easily changed.

According to a third aspect of the present invention, in accordance with the forward / backward movement of the suction tool main body, the posture of the suction tool main body in the front-back direction changes, and the distance between the bottom surface of the suction tool main body and the floor surface increases. In the direction opposite to the direction of travel, the opposite side is formed smaller and the passage shields provided before and after the suction port are formed by the bottom surface and the floor of the suction tool main body when the output of the electric blower is in the low output mode. When the output of the electric blower is in the high output mode, the passage shield is closed by the air passage. It is formed by raising the passage resistance of the air passage on the side opposite to the advancing direction of the suction device main body in the direction opposite to the traveling direction when the electric blower output is in the low output mode. Sucking from Reduces air consumption, reduces power consumption without lowering the dust collection capacity, and when the electric blower output is in the high output mode, the suction tool does not stick to the floor even at high airflow, and at the same time has excellent dust transfer capacity Vacuum cleaner.

According to a fourth aspect of the present invention, when the output of the electric blower is in the low output mode, the passage shields provided before and after the suction port are mounted so as to be movable in the vertical direction. Surface, the passage resistance of the air passage on the side opposite to the traveling direction of the suction tool main body is formed larger than that on the traveling direction side, and when the output of the electric blower is in the high output mode, The passage shield is configured to be pulled up from the position in the low output mode by the suction force of the suction tool.When the output of the electric blower is in the low output mode, the suction air from the direction opposite to the traveling direction is removed. The power consumption is reduced without reducing the dust collection capacity, and when the electric blower output is in the high output mode, the suction tool does not stick to the floor even at high air flow, and at the same time, the dust transfer ability is excellent. The removal machine.

According to a fifth aspect of the present invention, the passage shield is formed in a thin lip shape. When the output of the electric blower is in a low output mode, the passage shield blocks the suction tool in the reverse direction. The air passage is formed such that the passage resistance is greater than the traveling direction side, and when the output of the electric blower is in the high output mode, the passage shield in the direction opposite to the traveling direction falls down to the suction port side by suction force, In the air passage on the side opposite to the traveling direction, the passage resistance is made smaller than that in the low output mode.When the output of the electric blower is in the low output mode, suction air from the side opposite to the traveling direction is reduced. The power consumption is reduced without lowering the dust collecting capacity, and when the electric blower output is in the high output mode, the suction tool does not stick to the floor even at high air volume, and at the same time, the cleaning is excellent in the dust transferring ability. To become.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIGS. 1 to 3 show a first embodiment of the present invention.

FIG. 1 shows an example of a suction device of a vacuum cleaner showing a first embodiment of the present invention. FIG. 1 (a) shows a state in which the output of the electric blower is in a low output mode, and FIG. 1 (b) shows a high output. Indicates the mode.
FIG. 2 is a view of the suction tool as viewed from the bottom, and FIG. 3 is an overall configuration diagram illustrating an example of a vacuum cleaner using the suction tool.

1 to 3, reference numeral 11 denotes a suction tool main body.
A suction port 12 is opened on the bottom surface of the suction tool main body 11.
Around the suction port 12 (front, rear, left and right), an air passage serving as a passage for air sucked into the suction port 12 is formed by the bottom surface of the suction tool main body 11 and the floor surface 14, and in front of the suction port 12. An air passage 15a is formed at the rear, and an air passage 15b is formed at the rear. 13a and 13b are wheels for moving the suction tool. Before and after the suction port 12, as shown in FIG.
Are provided over substantially the entire width of the lip-shaped passage shields 16a and 16b having flexibility. The passage shields 16a and 16b are configured to move up and down by the rotational movement of the actuators 17a and 17b. Although not shown, a rotary solenoid is used for the actuators 17a and 17b.

In the above configuration, when the output of the electric blower 23 shown in FIG. 1A is in the low output mode, when the suction tool advances, the passage shield 16a in front of the suction port 12 is in the raised position, and the rear passage shield 16b is in the rear position. Is located at a lowered position, not shown, but at the time of retraction of the suction device, the position opposite to that at the time of forward movement, that is, the passage shield 16a is located at the lowered position, and the rear passage shield 16b is located at the raised position.

In the high output mode of the electric blower shown in FIG. 1B, the passage shields 16a and 16b are located at the raised position both when the suction tool advances and when the suction tool retreats. Numeral 18 denotes a connecting pipe, as shown in FIG.
0, the electric blower 2 in the cleaner body 21 through the garbage bag 22
3 so that the suction force of the electric blower 23 acts on the suction port 12. The electric blower 23 has a high output mode, a low output mode, and a plurality of output modes.

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

When the output of the electric blower 23 in FIG. 1A is in the low output mode, the air passage 15a or 15b on the side opposite to the traveling direction is provided by the passage shield 16a or 16b.
Is blocked, and the inflow of air from the direction opposite to the traveling direction is blocked, air flows into the suction port 12 from the air passage 15a or 15b on the traveling direction side, and the debris on the traveling direction side is introduced. Inhale with air. The suction device basically removes dust on the traveling direction side,
The suction air from the reverse side does not contribute to the suction of dust. Therefore, by the operation of the suction tool, the air volume to the cleaner can be reduced without lowering the suction ability for dust, that is, the dust collection performance.

On the other hand, in an electric blower that occupies most of the power consumption of the vacuum cleaner, the work amount is represented by the product of the air volume and the pressure loss in the passage of the entire vacuum cleaner including the hose and the like, and the air volume is reduced. That reduces work and power consumption. In addition, the pressure loss is reduced by reducing the air volume, and the power consumption can be greatly reduced by the reduction effect of both. Therefore, FIG.
By the suction tool operation shown in (a), an energy saving mode with high dust collection capability and low power consumption can be realized.

Next, when the output of the electric blower shown in FIG. 1B is high, the passage shields 16a and 16b are pulled up from the air passages 15a and 15b irrespective of the forward and backward movements of the suction tool. Even if it is large, the suction tool main body 11 does not stick to the floor surface 14 and is relatively heavy, such as a clip, so that it is hard to receive wind power, and can easily transfer garbage that is difficult to transfer in a passage such as a hose. Become like

(Embodiment 2) FIG. 4 shows an example of a suction device of a vacuum cleaner according to a second embodiment of the present invention. FIG. 4 (a) shows a state in which the output of the electric blower is in a low output mode. b) shows the case of the high output mode.

In the figure, a holding cylinder 24 provided with flexible passage shielding bodies 16a, 16b before and after the suction port 12 is shown.
a and 24b are rotatably fitted to the shafts 25a and 25b. Reference numerals 26a and 26b denote rotary solenoids which can rotate the holding cylinders 24a and 24b, that is, the passage shields 16a and 16b via belts 27a and 27b. In the low output mode of FIG. 4A, the passage shield 16a or 16b on the traveling direction is rotated and raised, and the reverse side of the traveling direction is lowered. In the high output mode of FIG. Then, the passage shields 16a and 16b are rotated and pulled up on both sides in the reverse direction.

According to the above configuration, in the low output mode shown in FIG. 4A, the air passage 15a or 15b on the opposite side of the traveling direction is blocked by the passage shield 16a or 16b, so that the inflow of air from the above direction is prevented. Blocked, inlet 12
Air flows from the air passage 15a or 15b on the traveling direction, and the power consumption of the electric blower can be reduced without lowering the suction ability for dust, that is, the dust collection performance.

Further, in the high output mode of FIG. 4B, the passage shields 16a, 16a, 1
6b is pulled up from the air passages 15a and 15b, so that the suction tool main body 11 does not stick to the floor surface 14 even if the suction air volume is large, and even the trash which is difficult to transfer in the passage such as a hose can be easily transferred. become able to.

The other configuration and operation are the same as those of the first embodiment, and the description is omitted.

(Embodiment 3) FIG. 5 shows an example of a suction device of a vacuum cleaner showing a third embodiment of the present invention. FIG. 5 (a) shows a state in which the output of the electric blower is in a low output mode, and FIG. ) Indicates the high output mode.

The passage shields 16a and 16b are configured to move up and down by the rotational motion of actuators 17a and 17b using a rotary solenoid.

On the other hand, the rotating shafts 29a and 29b of the front wheel 28a and the rear wheel 28b are slidable on sliding grooves 30a and 30b provided in the suction tool body 11 so as to be inclined inward and downward. When the suction tool main body 11 moves forward, the front wheel 28a moves rearward and downward, and the rear wheel 28b moves rearward and upward, so that the suction tool main body 11 assumes a posture in which the front portion is lifted, and the passage in front of the suction port 12 is provided. The shield 16a is separated from the floor surface 14, and the passage shield 16b behind the suction port 12 is provided.
Is in contact with the floor surface 14.

When the suction tool body 11 is retracted, the front wheel 28a moves forward and upward, and the rear wheel 28b moves forward and downward.
The passage shield 16b at the rear of the second unit is separated from the floor surface 14, and the passage shield 16a at the front of the suction port 12 is in contact with the floor surface 14.

In the low-power mode shown in FIG. 5A, both of the passage shields 16a and 16b are pulled down, and together with the inclination of the suction tool main body 11, the passage shield 16a and 16b are moved downward. The air passage 15a or 15b is open and the reverse side is closed, so that the suction air from the traveling reverse direction is reduced, and the power consumption of the electric blower is reduced without reducing the suction capacity for dust. Reduce. In the high output mode shown in FIG. 5B, both of the passage shields 16a and 16b are pulled upward, and the air passages 15a and 15b are higher than in the low output mode.
The passage resistance of b is reduced, and even if the amount of air sucked by the electric blower becomes large, the suction tool main body 11 does not stick to the floor surface 14 and easily transports garbage that is difficult to transfer in a passage such as a hose. become able to.

The other configuration and operation are the same as those of the first embodiment, and the description is omitted.

(Embodiment 4) FIGS. 6 and 7 show an example of a suction device of a vacuum cleaner according to a fourth embodiment of the present invention. FIG. 6 (a) shows the state when the output of the electric blower is in a low output mode. 6B is a side cross-sectional view in the high output mode, and FIG. 7 is a cross-sectional view of a main part of the front as viewed from the direction of arrows A1-A2 in FIG.

6 and 7, the passage shields 16a,
16b is held by holding plates 31a and 31b,
As shown in FIG. 7, a groove 31c is provided in each of a and 31b, and a projection 32a of the slide lever 32 is slidably inserted in the groove 31c, so that the slide lever 32 is moved to the low output side. When the holding plates 31a, 31b and the passage shields 16a, 16b are pulled down and the slide lever 32 is moved to the high output side, the holding plates 31a, 31b,
31b and the passage shields 16a, 16b are pulled up. A movement operation of the front wheel 28a and the rear wheel 28b;
The inclination of the suction tool main body 11 due to this is the same as that of the third embodiment, and the description is omitted.

With the above configuration, in the low output mode of FIG. 6A, the air passage 15a or 15b on the traveling direction side is opened by the passage shields 16a and 16b and the inclination of the suction tool main body 11, The reverse direction is closed, so that the amount of suction air from the direction opposite to the traveling direction is reduced, and the power consumption of the electric blower is reduced without lowering the suction capacity for dust. Further, in the high output mode of FIG. 6B, the passage resistances of the air passages 15a and 15b are lower than those in the low output mode, and even if the amount of suction air of the electric blower becomes large, the suction tool main body 11 is kept on the floor surface 14. This makes it possible to easily transfer garbage that does not stick to the inside and that is difficult to transfer in a passage such as a hose.

The other configuration and operation are the same as those of the first embodiment, and the description is omitted.

(Embodiment 5) FIG. 8 shows an example of a suction device of a vacuum cleaner according to a fifth embodiment of the present invention. FIG. 8 (a) shows a state in which the output of the electric blower is in a low output mode. b) shows the case of the high output mode.

In the figure, the passage shields 16a, 16b are held by holding plates 33a, 33b,
The ends 33c and 33d of the 33b face the inside of the suction port 12, and the holding plates 33a and 33b and the passage shields 16a and
6b is mounted movably in the vertical direction.

In the above configuration, in the low output mode shown in FIG. 8A, since the flow of the suction air in the suction port 12 is weak, the force for sucking the ends 33c and 33d of the holding plates 33a and 33b is weak, and The shields 16a and 16b remain lowered, while in the high-power mode of FIG. 8B, the flow of the suction air in the suction port 12 is strong.
The force for sucking the ends 33c and 33d of the holding plates 33a and 33b is strong, and the passage shields 16a and 16b are pulled up. A movement operation of the front wheel 28a and the rear wheel 28b;
The inclination of the suction tool main body 11 due to this is the same as in the third embodiment.

With the above configuration, in the low output mode of FIG. 8A, the air passage 15a or 15b in the traveling direction is opened by the passage shields 16a and 16b and the inclination of the suction tool main body 11, The reverse direction is closed, so that the amount of suction air from the direction opposite to the traveling direction is reduced, and the power consumption of the electric blower is reduced without lowering the suction capacity for dust. Further, in the high output mode of FIG. 8B, the passage resistances of the air passages 15a and 15b are lower than in the low output mode, and even if the amount of suction air of the electric blower becomes large, the suction tool main body 11 is moved to the floor surface 14. This makes it possible to easily transfer garbage that does not stick to the inside and that is difficult to transfer in a passage such as a hose.

The other configuration and operation are the same as those of the first embodiment, and the description is omitted.

(Embodiment 6) FIG. 9 shows an example of a suction device of a vacuum cleaner according to a sixth embodiment of the present invention. FIG. 9 (a) shows a state in which the output of the electric blower is in a low output mode. b) shows the case of the high output mode.

In the figure, reference numerals 34a and 34b denote thin and flexible lip-shaped passage shields, which are holding cylinders 35a and 35b.
5b. The holding cylinders 35a and 35b are
When the electric blower 23 is stopped and no suction force is applied to the connection pipe 18, the passage shields 34a and 34b are suspended downward by their own weights. I have. Front wheel 28a, rear wheel 28
The moving operation of b and the inclination of the suction tool main body 11 due to the movement are the same as those in the third embodiment.

In the low power mode shown in FIG. 9A, when the suction device main body 11 moves forward, the passage shield 34a on the traveling direction side is separated from the floor surface 14 by the inclination posture of the suction device main body 11. And the air passage 15
The air is sucked up to the position shown in FIG. On the other hand, the passage shield 34 on the side opposite to the traveling direction
b is in contact with the floor surface 14 due to the inclination posture of the suction tool main body 11, and closes the air passage 15b. Therefore, the suction air enters only from the traveling direction side, and the power consumption of the electric blower 23 is reduced without lowering the suction ability for dust. The passage shields 34a and 34b can be moved only to the positions shown in the drawing, respectively.
Regulated by:

Next, when the advancing direction of the suction tool main body 11 is switched from forward to backward, although not shown, the front wheels 28
a, by the movement of the rear wheel 28b, the suction tool main body 11 is lifted up at the rear portion to assume a posture in which the front portion is sunk, and the passage shield 34
b is separated from the floor surface 14, and the air that has been sucked up from the air passage 15a is also dispersed into the air passage 15b, and the suction force on the passage shield 34a is weakened. For this reason, the passage shield 34a hangs down by its own weight, and the suction tool main body 1
Combined with the tilting posture of 1, it comes into contact with the floor surface 14 and is pulled and moved to the position c to shut off the air passage 15a. The passage shield 34a is restricted by the suction tool main body 11 so that it can move only to the position c. As described above, the suction air is concentrated in the air passage 15b, the suction force on the passage shield 34b is increased, and the passage shield 3
4b is sucked up to the position d, and the air passage 15b is completely opened. As described above, even if the suction tool travel direction is reversed, air is sucked from the new travel direction side and not sucked from the reverse direction side, and therefore, the consumption of the electric blower without reducing the suction capacity for dust is reduced. Reduce power.

Next, in the high output mode of FIG. 9B, the amount of suction air increases, and the internal pressure (negative pressure) of the suction port 12 increases. The passage shielding body 34b on the opposite side to the traveling direction, which has been in contact with the surface 14 and closed the air passage 15b, is forcibly sucked into the suction port 12 side,
Therefore, the air passages 15a and 15b are both open, and the internal pressure of the suction port 12 is reduced, thereby preventing the suction tool main body 11 from sticking to the floor surface 14. At the same time, it is possible to easily transfer dust that is difficult to transfer in a passage such as a hose due to the increased suction air amount.

(Embodiment 7) FIG. 10 shows an example of a suction device of a vacuum cleaner showing a seventh embodiment of the present invention. FIG. 10 (a) shows a state in which the output of the electric blower is in a low output mode. b) shows the case of the high output mode.

In the figure, reference numerals 34a and 34b denote thin and flexible lip-shaped passage shields, which are holding cylinders 35a and 35b.
5b. The holding cylinders 35a and 35b are
It is configured to be rotatable around a and 36b, and when the electric blower 23 is stopped, the passage shields 34a and 34b are in a state of hanging down by their own weight.

In the above configuration, in the low output mode of FIG. 10A, the passage shield 34 on the suction tool traveling direction side.
a is rotated toward the suction port 12 by the contact motion with the floor surface 14, and is further sucked up to the position shown in the figure by suction air flowing from the air passage 15a. On the other hand, the passage shielding body 34b on the side opposite to the traveling direction comes into contact with the floor surface 14 at the position shown in the figure due to the contact movement with the floor surface 14 and the regulation by the suction tool main body 11, and the air passage 15b is closed. And

Here, when the advancing direction of the suction tool is reversed,
This time, the passage shielding body 34b on the traveling direction side is the floor surface 14.
With the contact motion, the air passage 15b is reversely moved toward the suction port 12, and the air passage 15b is slightly opened. As a result, the air passage 1
The air sucked from 5a is also dispersed into the air passage 15b, and the suction force on the passage shield 34a is reduced. In this state, since the passage shields 34a and 34b are set to be in a state of light contact with the floor surface 14 by their own weight, the passage shield 34a is involved in the contact motion with the floor surface 14 and the floor surface 1
The position c is completely in contact with the position 4. On the other hand, passage shield 3
The air passage 4b is sucked up to the position d by the suction air whose air passage 15a is shut off by the passage shield 34a and flows into the air passage 15b in a concentrated manner.

As described above, even if the suction tool advancing direction is reversed, air is sucked from the new advancing direction side and is not sucked from the opposite direction side. Since the passage shields 34a and 34b are thin, the reversing operation at the time of reversing the traveling direction is performed smoothly.

In the high output mode shown in FIG.
The suction air amount increases, the internal pressure (negative pressure) of the suction port 12 increases, and the floor surface 1 in the low output mode shown in FIG.
4, the passage shielding body 34b in the reverse direction of travel, which has closed the air passage 15b, is forcibly sucked into the suction port 12 side, so that both the air passages 15a and 15b are open, and the internal pressure of the suction port 12 is reduced. As a result, the suction tool main body 11 is prevented from sticking to the floor surface 14. At the same time, it is possible to easily transfer dust that is difficult to transfer in a passage such as a hose due to the increased suction air amount.

[0059]

According to the first aspect of the present invention, when the output of the electric blower is in the low output mode, the amount of air sucked from the reverse direction is reduced while the air flow from the suction tool traveling direction remains unchanged. The power consumption of the electric blower can be reduced without substantially lowering the dust collecting ability, and when the output of the electric blower is in the high output mode, the air passage on the reverse side of the air passage is more advanced than in the low output mode. By increasing the passage area or decreasing the passage resistance,
The suction tool does not stick to the floor surface, and at the same time, it is possible to provide a vacuum cleaner having excellent trash transfer capability.

According to the second aspect of the present invention, the vertical movement or the rotational movement of the passage shield provided before and after the suction port causes
The passage area or passage resistance of the air passage before and after the suction port can be easily changed.

According to the third aspect of the invention, when the output of the electric blower is in the low output mode, the inclination posture of the suction tool main body and the passage shields provided before and after the suction port and protruding into the air passage are provided. By reducing the amount of sucked air from the traveling reverse direction, the power consumption of the electric blower is reduced without substantially lowering the dust collecting ability, and when the output of the electric blower is in the high output mode, the passage shielding is performed. By lifting the body from the air passage, the cleaner can be excellent in the ability to transfer dust without the suction tool sticking to the floor.

According to the fourth aspect of the present invention, the passage shields movably mounted in the up and down direction before and after the suction port are provided.
When the output of the electric blower is in the low output mode, the electric blower protrudes into the air passage and reduces the amount of sucked air from the reverse direction of travel, thereby substantially reducing the power consumption of the electric blower without lowering the dust collecting ability. When the output of the electric blower is in the high output mode, the passage shield is pulled up from the position in the low output mode by the suction force of the suction tool, so that the suction tool sticks to the floor surface. In addition, it is possible to provide a vacuum cleaner having excellent trash transfer capability.

According to the fifth aspect of the present invention, when the electric blower output is in the low output mode, the air passage on the side opposite to the forward direction of the suction tool is provided by the thin lip-shaped passage shield provided before and after the suction port. Is formed so that the passage resistance is larger than the traveling direction side, the power consumption is reduced without lowering the dust collecting ability, and when the electric blower output is in the high output mode, the passage shielding body on the traveling reverse direction side is sucked. The suction tool is caused to fall down to the suction port side by the suction force, so that the suction tool does not stick to the floor surface even at a high air flow, and at the same time, it is possible to provide a vacuum cleaner having excellent trash transfer capability.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a suction tool of a vacuum cleaner showing a first embodiment of the present invention.

FIG. 2 is a bottom view of the suction tool as viewed from the bottom.

FIG. 3 is an overall configuration diagram of a vacuum cleaner showing an example using the suction tool.

FIG. 4 is a side sectional view of a suction tool of a vacuum cleaner showing a second embodiment of the present invention.

FIG. 5 is a side sectional view of a suction tool of a vacuum cleaner showing a third embodiment of the present invention.

FIG. 6 is a side sectional view of a suction tool of a vacuum cleaner showing a fourth embodiment of the present invention.

FIG. 7 is a sectional view of a main part of the front of the suction tool of FIG. 6;

FIG. 8 is a side sectional view of a suction tool of a vacuum cleaner showing a fifth embodiment of the present invention.

FIG. 9 is a side sectional view of a suction tool of a vacuum cleaner showing a sixth embodiment of the present invention.

FIG. 10 is a side sectional view of a suction tool of a vacuum cleaner showing a seventh embodiment of the present invention.

FIG. 11 is a side sectional view of a suction tool of a vacuum cleaner showing a conventional example.

FIG. 12 is a side sectional view of a suction tool of a vacuum cleaner showing another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Suction implement main body 12 Suction port 14 Floor surface 15a, 15b Air passage 16a, 16b Passage shield 17a, 17b Actuator 21 Cleaner main body 23 Vacuum cleaner 26a, 26b Rotary solenoid 27a, 27b Belt 28a Front wheel 28b Rear wheel 29a, 29b Rotary shaft 30a, 30b Sliding groove 31a, 31b Holding plate 32 Slide lever 33a, 33b Holding plate 34a, 34b Passage shield

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroyuki Kayama 1006 Kazuma Kadoma, Kadoma-shi, Osaka Matsushita Electric Industrial Co., Ltd. F-term (reference) 3B061 AA33 AA41 AA57

Claims (5)

[Claims] 1. A suction port is provided on a bottom surface of a suction tool main body, and an air passage is formed between the bottom surface of the suction tool main body and a floor surface at least in a front-rear direction of the suction port, and a passage area or a passage of the air passage. Has a suction tool that can change the resistance,
An electric blower having a plurality of high and low output modes while applying a suction force to the suction tool, and when the output of the electric blower is in the low output mode, the air blower moves in the air passage on the reverse side of the suction tool in the traveling direction. When the output of the electric blower is in the high output mode, the passage area of the air passage in the reverse direction of the suction tool is made larger than that in the low output mode. Vacuum cleaner with low passage resistance. 2. The vacuum cleaner according to claim 1, wherein a passage area or a passage resistance of an air passage before and after the suction port is changed by a vertical movement or a rotation movement of a passage shield provided before and after the suction port. 3. The suction tool main body changes its inclination in the front-rear direction in accordance with its forward and backward movement, and the distance between the bottom surface of the suction tool main body and the floor is smaller on the reverse direction than on the direction of travel. When the output of the electric blower is in the low output mode, the passage shields provided before and after the suction port are projected into an air passage formed by the bottom surface and the floor surface of the suction device main body. The passage resistance of the air passage on the side opposite to the traveling direction of the main body is made larger than that on the traveling direction side, and when the output of the electric blower is in the high output mode, the passage shielding body is pulled up from the air passage, and the suction tool main body is 3. The vacuum cleaner according to claim 1, wherein the passage resistance of the air passage on the side opposite to the traveling direction is smaller than in the low output mode. 4. A passage shield provided before and after the suction port is mounted so as to be movable in the vertical direction, and when the output of the electric blower is in a low output mode, the passage shield is formed in the air passage formed by the bottom surface of the suction device main body and the floor surface. And the passage resistance of the air passage on the side opposite to the advancing direction of the suction device main body is formed larger than that on the advancing direction side. When the output of the electric blower is in the high output mode, the passage shielding body applies the suction force of the suction device. 4. The structure according to claim 3, wherein the position is raised above the position in the low output mode.
Vacuum cleaner as described. 5. The passage shielding body is formed in a thin lip shape,
When the output of the electric blower is in the low output mode, the passage shield forms an air passage on the reverse side of the suction tool so that the passage resistance is larger than the traveling direction side, and the output of the electric blower is in the high output mode. The passage shield on the reverse side of the traveling direction falls down to the suction port side by the suction force of the suction tool,
Therefore, the passage resistance of the air passage on the opposite side of the traveling direction is made smaller than that in the low output mode.
Or the vacuum cleaner according to 2 or 3.