JP3343979B2 - Vacuum cleaner floor nozzle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor nozzle of a vacuum cleaner having a rotary brush effective for cleaning carpets and the like.

[0002]

2. Description of the Related Art Conventionally, floor nozzles of this type of vacuum cleaner are disclosed in Japanese Patent Application Laid-Open Nos. 63-59922 and 63-63.
As shown in Japanese Patent No. 421 or the like, a configuration as shown in FIG. 17 is generally used.

[0003] 1 is provided in an air suction chamber 4 with an air turbine 2 rotating by the suction force of an electric blower (not shown) provided in the vacuum cleaner main body and a rotating brush 3 for scraping out dust in the carpet. It is a floor nozzle provided with a belt 5 for transmitting the driving force of the air turbine 2 to the rotating brush 3. Further, a turbine chamber 6 in which the air turbine 2 is disposed
The turbine chamber 6 and the suction port 4
And a communication port 8 for communicating with the
Is provided, and a lever 10 which is connected to the cover 9 to open and close the communication port 8 is provided. When the surface to be cleaned is carpet by switching the lever 10, the communication port 8 is opened to rotate the air turbine 2 by the suction force of the electric blower.
Is transmitted to the rotary brush 3 via the rotary brush 3 to rotate the rotary brush 3 to lift up and suck in dust in the carpet. In the case of a floor or a tatami mat, the communication port 8 is closed to close the air tabin 2. Dust is sucked in a state where the rotation of the rotating brush 3 is stopped at the same time as the rotation is stopped.

[0004]

However, in such a conventional configuration, when the rotary brush 3 is used on a carpet having a long bristle, the rotation of the rotary brush 3 cannot be sufficiently obtained due to the resistance of the carpet, and dust in the carpet is reliably removed. You can't scramble. Further, when dust is accumulated in the dust collection chamber in the main body of the vacuum cleaner, the amount of air for rotating the air turbine 2 is reduced, and therefore, the rotation speed of the rotating brush 3 is reduced, and the dust is removed from the carpet. And the dust collection efficiency decreases.

As described above, in the conventional structure, the number of revolutions of the rotating brush 3 for scraping up dust in the carpet easily varies depending on various conditions such as the type of carpet and the strength of the suction force. Many cases were seen.

The present invention is intended to solve such a problem. By making it possible to always set the rotation speed of the rotating brush 3 to a certain value or more during use, the dust collection performance is significantly reduced. It is an object of the present invention to provide a floor nozzle of a vacuum cleaner in which prevention is provided.

[0007]

The technical solution of the first invention for solving the above-mentioned problem is that a rotary brush is incorporated.
As a driving source for the suction chamber and the rotating brush, a hand by suction force is used.
A step and a means by an electric motor are respectively provided, and
On and off at regular intervals
The configuration is such that a switching means is provided .

[0008] The means of the second invention has a built-in rotary brush.
The suction chamber and the rotating brush
Means and an electric motor means, respectively,
When the motor is placed on the side opposite to the side where the means by
In both cases, means for selectively switching the operation of the motor are provided.
There is a digit structure .

According to a third aspect of the present invention, a rotary brush is provided.
By suction force as a drive source of the suction chamber and the rotating brush
A rotating air turbine and electric motor are installed, respectively,
Detects the electromotive force of the motor
A rotation speed detection stage for detecting the rotation speed of the transfer brush;
The operation of the electric motor is selectively turned off by the rotation speed detecting means.
This is a configuration provided with a means for switching .

According to a fourth aspect of the present invention, there is provided a rotating speed detecting means.
Control the rotation of the electric blower built into the vacuum cleaner
It is configured to include means for performing

According to a fifth aspect of the present invention, a rotary brush is provided.
By suction force as a drive source of the suction chamber and the rotating brush
A rotating air turbine and electric motor are installed, respectively,
The rotating direction of the rotating brush by the air turbine and the electric motor
The direction of rotation of the rotating brush by the
To turn the motor on and off at regular intervals.
It has a configuration in which steps are provided .

[0012] means of the sixth aspect of the present invention is provided with a suction port communicating the dust collecting chamber and the dust collecting chamber for collecting the electric motor and dust sucking the dust, claim 5 any one electrical described The floor nozzle of the vacuum cleaner is connected to the suction port side.

[0013]

The operation of the above arrangement is as follows.

[0014] According to the first aspect of the present invention, luck of the air turbine
A means for switching the operation of the motor on and off at regular intervals during rotation is provided. <br/> By installing a means to reduce the air volume , the motor rotates when a large dust or foreign matter is sucked in. This prevents the brush from locking and damaging the motor.

According to a second aspect, an air turbine is provided.
Or as a means to detect the number of rotations of the rotating brush,
By detecting the electromotive force of the
The motor provided for operation also serves as the rotation speed detection means
Can be constructed at low cost without using separate parts.
In particular, the size and weight can be reduced .

According to the third invention, the drive of the air turbine is
The direction of rotation of the rotating brush and the rotation of the motor
Set the rotating direction of the rotating brush in the reverse direction and set the motor
Switch on and off at regular intervals
In addition, when the motor is on and off , the rotating brush
The turning direction is reversed and the carpet hair is scraped from both sides
Dust collection performance can be significantly improved.
You .

[0017]

An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1 and FIG. 2, reference numeral 21 denotes an upper opening-shaped dust collecting chamber 22 at the front side, and an electric blower 23 for sucking dust, a cord winding device 25 around which a power cord 24 is wound, and the like at the rear. The dust collecting chamber 22 includes a paper bag 26 for accumulating dust.
Is detachably attached, and the cover 2 is
7 is rotatably arranged on the main body 21. The lid 27 in front of the main body 21 has an intake port 30 to which a connection pipe 29 of a hose 28 is attached, a handle 31 is formed at the tip of the hose 28, and a floor nozzle 32 is connected to a floor nozzle pipe 33. And extension tubes 34A and 34B. Casters 3 for moving are provided on the lower surface of the main body 21.
5 and a roller 36 on the side surface. A rotary brush 38 for scraping out dust entering the carpet is disposed in the suction chamber 37 of the floor nozzle 33, and an air turbine 39 and a motor 40 for applying a driving force to the rotary brush 38 are connected to a turbine chamber 41 and a motor chamber 42. And the air turbine 39 and the electric motor 40
Is a rotating brush 38 via a belt A43 and a belt B44.
Is linked to The turbine chamber 41 includes the suction chamber 37 and the wall 4
The communication port 46 is formed with a communication port 46, and the communication port 46 can be opened and closed by a shielding plate 48 connected to a switching lever 47. A communication port 46 is provided on the wall 45.
A vent 49 communicating with the floor nozzle pipe 33 is provided on the side of the floor nozzle pipe 33, and is similarly opened and closed by a shielding plate 48. The shielding plate 48 has an opening 48 ′ so that the ventilation hole 49 is opened when the communication port 46 is shielded. Reference numeral 50 denotes a limit switch disposed in the motor room 42, which switches on and off the operation of the motor 40. The limit switch 50 is normally in an off state, but when the switching lever 47 is positioned to the left. The operation of the electric motor is turned on by contacting the lever 50 'of the limit switch 50.

The operation of the above configuration is as follows.

When the surface to be cleaned is a floor or a tatami mat, the switching lever 47 is operated to shield the communication port 46 with the shielding plate 48 and the rotary brush 38 is not rotated and the air is sucked from the ventilation port 49.
When the surface to be cleaned is a carpet, the switching lever 47 is operated to open the communication port 46, the air turbine 39 is rotated by suction, and the rotating brush 38 is rotated via the belt A43.
In this case, the driving force is transmitted to the rotating brush 38 and the rotating brush 38 is rotated to lift up and suck in dust accumulated in the carpet. In addition, when the carpet has long bristle feet and its resistance causes the rotation of the rotating brush 38 to decrease or the suction force decreases and the rotation of the air turbine 39, that is, the rotation of the rotating brush 38, decreases, the force to lift the carpet sufficiently. In this case, the ventilation plate 49 is closed by the shielding plate 48 and the communication port 46 is opened to operate the switching lever 47 in a state where the air turbine 39 is rotated to abut on the lever 50 ′. The operation of the electric motor 40 is turned on by turning on the limit switch 50, and the air turbine 3 is turned on via the belt B44.
9 rotates the rotating brush 38 together with the driving force.

According to the second aspect of the present invention, as shown in FIGS. 3 and 4, the air flow detecting means 51 for detecting the amount of air flowing into the turbine chamber 41 is provided. The switch 52 is provided so as to turn on the operation of the electric motor 40 when the state becomes. FIG. 5 shows the relationship between the number of rotations of the rotary brush 38 and the air flow rate by the air turbine 39 at this time.
, The rotation speed of the rotating brush 38 also decreases. Therefore, when the air volume falls below a certain level, the motor 40 is automatically rotated to rotate the rotating brush 38 together with the driving force of the air turbine 39, thereby reducing the air volume and reducing the dust collection performance due to the insufficient rotating force of the air turbine 39. It is to prevent.

According to the third aspect of the present invention, as shown in FIG. 6, the air flow detecting means 51 for detecting the air flow flowing into the turbine chamber 41 is provided, and the air flow detecting means 51 has a constant air flow. Means 5 for turning on and off the operation of the electric motor 40 for a few cycles after the operation of the electric motor 40 is turned on by the air flow rate detecting means 51, while the operation of the electric motor 40 is turned on.
3 are arranged. Thereby, for example, when a large amount of dust or the like is sucked into the suction chamber 37 of the floor nozzle 32, the air volume is reduced, so that the operation of the electric motor 40 is immediately turned on by the air volume detection means 51 and the electric motor 40 is operated.
Instead of running the motor 40 all the time,
By repeating the operation of turning on and off several cycles,
It is possible to detect whether the reduction in the air volume has occurred due to accumulation of dust in the dust collection chamber 22 or other abnormal conditions, thereby saving unnecessary power consumption and locking the rotating brush 38 by large dust and causing the motor 40 to lock. This is to prevent damage.

According to the fourth aspect of the present invention, as shown in FIGS. 7 and 8, a rotation speed detecting means 54 for detecting the rotation speed of the air turbine 39 is provided in the turbine chamber 41, whereby the air turbine 39 The operation of the electric motor 40 is turned on when the rotation speed of the motor reaches a certain rotation speed. The number of rotations of the air turbine 39 does not decrease only when the amount of airflow decreases, but changes due to a difference in resistance applied to the rotating brush 38 depending on, for example, the length of the carpet hair. However, the rotation of the rotating brush 38 may be reduced. Therefore, by detecting a change in the number of revolutions of the rotating brush 38, a decrease in the number of revolutions of the rotating brush 38 due to a type of carpet or accumulation of dust in the dust collecting chamber 22 is prevented, and dust collection performance is improved. This is to prevent the drop.

According to the fifth aspect, as shown in FIGS. 9 and 10, the rotation speed detecting means 54 for detecting the rotation speed of the air turbine 39 is provided in the turbine chamber 41 and the pressure in the intake passage is reduced. A pressure detecting means 55 for detecting is provided, and the rotational speed detecting means 54 and the pressure detecting means 55 are connected in parallel, so that the operation of the electric motor 40 is turned on regardless of which detecting means operates. As a result, when dust accumulates in the dust collection chamber 22 or when the pressure changes due to a difference in adhesion between the floor nozzle 32 and the surface to be cleaned or a difference in pressing force, the pressure detection unit 55 operates and the air volume decreases. When the rotational speed decreases due to some resistance applied to the rotating brush 38, the rotating speed detecting means 54 operates, and in any case, the operation of the electric motor 40 is turned on, and the rotating speed of the rotating brush 38 is increased to a certain value or more. It is possible to maintain and prevent a decrease in dust collection performance.

According to the sixth aspect of the present invention, as shown in FIG. 11, the rotation speed detecting means 54 for detecting the rotation speed of the air turbine 39, and the rotation speed detecting means 54 Control means 56 for controlling rotation is provided. Thus, when the rotation speed of the air turbine 39 decreases, the control means 56 operates to increase the rotation of the electric blower 23, thereby increasing the suction force and increasing the rotation speed of the rotating brush 38 due to the increase in the air volume. By raising the height, the dust collection performance is improved. Conversely, when the rotation speed of the air turbine 39 is equal to or higher than a certain value, the control means 56 operates to reduce the rotation of the electric blower 23, thereby reducing the air flow and reducing the rotation speed of the rotating brush, thereby saving power and reducing noise. It is intended. In particular, when the floor nozzle 32 is lifted, the rotating brush 38 rotates in a no-load state. Therefore, the rotation speed of the electric blower 23 is reduced by increasing the noise value due to the wind noise of the air turbine 39 due to the considerably high speed rotation. Thereby, the rotation speed of the air turbine 39 is suppressed, and low noise is achieved.

According to the seventh aspect of the present invention, the magnet 57 and the magnetic field sensing device 58 are arranged on the rotating shaft 39 'of the air turbine 39 as shown in FIG.
At the same time, the magnet 57 rotates to change the magnetic field, and the change in the magnetic field can be detected by the magnetic field sensing device 58 at the rotation speed of the air turbine 39.

According to the eighth aspect, the air turbine 39
When the rotating brush 38 is rotated only by the electric motor 4
0 is rotated by the belt B44. Motor 4 at this time
The rotation speed is detected by a change in the electromotive current generated by the rotation of 0, and the rotation speed detection means 54 can also be used by the driving motor 40, so that it is not necessary to use another component.

According to the ninth aspect, as shown in FIGS. 13 and 14, the light-emitting element 59 and the light-receiving element 60 are relatively disposed so as to face the intake passage of the steering wheel 31.
Dust amount detecting means 61 for detecting a change in the amount of light from 9 to the light receiving element 60 to detect the amount of dust in the intake passage is provided. Further, a switching device 62 for turning on and off the operation of the electric motor 40 in accordance with a signal from the dust amount detecting means 61 is provided. When the amount of dust in the intake passage is large by the dust amount detecting means 61, the operation of the electric motor 40 is turned on, and when the amount of dust is small, the operation of the electric motor 40 is turned off, and the rotary brush 38 is rotated by driving the air turbine 39. Things. Therefore, the operation of the electric motor 40 and the air turbine 39 is automatically switched according to the amount of dust on the surface to be cleaned, so that power saving and dust collection performance can be improved, and effective cleaning according to the amount of dust can be performed. .

According to the tenth aspect, as shown in FIG. 15, the rotation speed detecting means 54 for detecting the rotation speed of the air turbine 39 or the rotating brush 38 and the rotation speed detecting means 5
By providing the electromotive force control means 63 for controlling the electromotive force of the electric motor 40 by the signal from the
When the number of revolutions of the motor becomes a certain value or more, the electric motor 40 acts as a generator, and the electric power generated by the electric power generation is consumed by the electromotive force control means 63.
The rotation of the rotating brush 38 is reduced with the rotation of
It is intended to reduce noise. In particular, when the floor nozzle 32 is lifted, the rotating brush 38 rotates in a no-load state, so that the rotating brush 38 rotates at a considerably high speed and the noise value increases due to the wind noise of the air turbine 39. , Low noise.

According to the eleventh aspect, as shown in FIG. 16, the rotating direction of the rotating brush 38 driven by the air turbine 39 and the rotating direction of the rotating brush 38 driven by the electric motor 40 are set in opposite directions. Is provided with a timer device 64 for turning on and off the operation of the apparatus at regular intervals. As a result, the electric motor 40 operates periodically, and the rotating brush 38 repeats the normal rotation and the reverse rotation, so that the hair of the carpet is scraped up from both sides, thereby significantly improving the dust collecting performance. Further, the rotation direction of the electric motor 40 may be only one direction, and it is not necessary to switch the rotation direction of the electric motor 40 as in the related art, so that the size and life of the electric motor 40 can be improved and the cost can be reduced.

[0031]

As described above, the present invention has the following significant effects.

According to the first aspect of the present invention, the decrease in the air volume is caused by dust collection.
Did accumulates in the room and is caused by other abnormal conditions
Can be detected to prevent malfunction and unnecessary consumption
Rotary brush saves power and is driven by large garbage
Lock to prevent the motor from being damaged.
You .

According to the invention of claim 3, the air turbine
Or, as a means for detecting the number of rotations of the rotating brush,
By sensing the electromotive force of the motive and judging the change,
The motor provided for driving also serves as the rotation speed detection means.
It can be configured at low cost without using separate parts.
In addition, the size and weight can be reduced .

According to the fifth aspect of the present invention, the rotation direction of the rotating brush driven by the air turbine and the rotation direction of the rotating brush driven by the electric motor are set in opposite directions, and the operation of the electric motor is turned on and off at regular intervals. By providing the switching device for switching, the rotating brush repeats normal rotation and reverse rotation, and scrapes the carpet hair from both sides, so that the dust collection performance can be remarkably improved. Furthermore, since the rotation direction of the motor need only be one direction and it is not necessary to switch the rotation direction of the motor as in the related art, the size and life of the motor can be reduced and the cost can be reduced.

According to the present invention, as described above, a very effective effect can be obtained.

[Brief description of the drawings]

FIG. 1 is a side view of a vacuum cleaner in a use state according to an embodiment of the first invention.

FIG. 2 is an internal configuration diagram of a floor nozzle showing an embodiment of the first invention.

FIG. 3 is an internal configuration diagram of a floor nozzle showing an embodiment of the second invention.

FIG. 4 is a circuit diagram showing an embodiment of the second invention.

FIG. 5 is a graph showing the correlation between the number of rotations of the rotating brush and the air volume.

FIG. 6 is an internal configuration diagram of a floor nozzle showing an embodiment of the third invention.

FIG. 7 is an internal configuration diagram of a floor nozzle showing an embodiment of the fourth invention.

FIG. 8 is a circuit diagram showing an embodiment of the fourth invention.

FIG. 9 is an internal configuration diagram of a floor nozzle showing an embodiment of the fifth invention.

FIG. 10 is a circuit diagram showing one embodiment of the fifth invention.

FIG. 11 is a circuit diagram showing one embodiment of the sixth invention.

FIG. 12 is an internal configuration diagram of a floor nozzle showing an embodiment of the seventh invention.

FIG. 13 is a partial sectional view of a handle showing an embodiment of the ninth invention.

FIG. 14 is a circuit diagram showing an embodiment of the ninth invention.

FIG. 15 is an internal configuration diagram of a floor nozzle showing an embodiment of the tenth invention.

FIG. 16 is an internal configuration diagram of a floor nozzle showing an embodiment of the eleventh invention.

FIG. 17 is an internal configuration diagram of a floor nozzle showing a conventional example.

[Explanation of symbols]

 32 floor nozzle 38 rotating brush 39 air turbine 40 motor 41 turbine room 42 motor room 45 wall 46 communication port 47 switching lever 48 shielding plate 48 'opening 49 vent 50 limit switch 50' lever 51 air volume detecting means 52 switch 53 switching means 54 Rotational speed detecting means 55 Pressure detecting means 56 Control means 57 Magnet 58 Magnetic field detecting device 61 Dust amount detecting means 62 Switching device 63 Electromotive force control means 64 Timer device

──────────────────────────────────────────────────の Continued on the front page (72) Inventor Masakuni Soejima 1006 Kadoma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. In-company (56) References JP-A-1-303118 (JP, A) JP-A-2-268718 (JP, A) JP-A-4-361726 (JP, A) JP-A-2-131733 (JP, A) JP-A-60-58122 (JP, A) JP-A-61-249426 (JP, A) JP-A-61-238223 (JP, A) JP-A-62-277927 (JP, A) 8360 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) A47L 9/02-9/04

Claims (6)

(57) [Claims] 1. A suction chamber containing a rotating brush, a means by suction force and a means by an electric motor as driving sources of the rotating brush are provided, respectively .
A means to switch the drive on and off at regular intervals
Floor nozzle of the provided vacuum cleaner. 2. A suction chamber having a built-in rotary brush, a means by a suction force and a means by an electric motor as driving sources of the rotary brush are provided, respectively, and the means by the suction force is provided.
Motor on the side opposite to the
Floor nozzle of a vacuum cleaner provided with means for selectively switching operation . 3. A suction chamber containing a rotating brush and an air turret rotating by a suction force as a driving source of the rotating brush.
A bin and a motor are provided, respectively, and the electromotive force of the motor is
Sensing the air turbine or rotating brush speed.
A rotation speed detection stage for detecting the rotation speed;
Means for selectively switching the operation of the motor.
Floor nozzle of the vacuum cleaner. 4. A vacuum cleaner main body by means of rotation number detecting means.
Contractor with means for controlling the rotation of the electric blower built in
The floor nozzle of the vacuum cleaner according to claim 3 . 5. A suction chamber containing a rotating brush and an air turret rotating by a suction force as a driving source of the rotating brush.
A bin and an electric motor are arranged respectively, and the air turbine is
Rotation direction of the rotating brush and the rotating brush
Reverse the rotating direction of the brush and
A floor nozzle of a vacuum cleaner provided with means for turning on and off at regular intervals . Further comprising: a suction port communicating the dust collecting chamber and the dust collecting chamber for collecting the electric motor and dust sucking the dust, claim 1
6. A vacuum cleaner, wherein a floor nozzle of the vacuum cleaner according to any one of claims 5 to 5 is connected to the suction port side.