KR20110001121A - Vacuum cleaner - Google Patents

Abstract

PURPOSE: A vacuum cleaner is provided to enable a user to easily confirm the dust removal period by generating dust removal signal when the certain amount of dusts of a dust box reaches a certain level. CONSTITUTION: A vacuum cleaner includes a body(10), a dust box(200), a pressing member, a power transmission unit, a timer, a sensing unit, and an alarm unit. The dust box is installed at the body and allows the detachment thereof from the body. The pressing member is formed at the inner portion of the dust boxy and allows the movement thereof in the dust box. The pressing member compresses the dusts of the dust box, and the power transmission unit transmits power for the movement of the pressing member. The sensing unit resets the time by sensing the movement of the power transmission unit. The alarm unit generates an alarm signal.

Description

Vacuum cleaner {Vacuum cleaner}

This embodiment relates to a vacuum cleaner.

In general, a vacuum cleaner is a device that sucks air containing dust by using a suction force generated by a suction motor provided inside the cleaner body, and then filters the dust in the dust separator.

The vacuum cleaner includes a suction nozzle for sucking air containing dust, a cleaner body in communication with the suction nozzle, a suction motor provided in the cleaner body to generate air suction force, and air from the cleaner body. And a dust separation unit for separating dust and a dust container for storing dust separated from the dust separation apparatus.

An object of the present embodiment is to provide a vacuum cleaner to increase the amount of dust stored in the dust container.

Another object of the present embodiment is to provide a vacuum cleaner that generates a dust emptying signal when a predetermined amount or more of dust is stored in the dust container.

Vacuum cleaner according to one aspect, the cleaner body; A dust container detachably mounted to the cleaner body and storing dust; A pressing member movably provided in the dust container to compress the dust stored in the dust container; A power transmission unit transmitting power for moving the pressing member; A timer for counting a time when the urging member moves; A sensing unit for sensing the movement of the power transmission unit and resetting the timer; And an operation is determined according to the time count in the timer, and includes a notification unit for generating a notification signal to the outside.

According to the proposed embodiment, since the dust stored in the dust container is compressed by the pressing member, the amount of dust stored in the dust container can be maximized.

In addition, when the amount of dust stored in the dust container reaches a predetermined amount, as the dust emptying signal is generated, the user can easily check the dust emptying time, thereby increasing user convenience.

In addition, when the amount of dust counted by the timer exceeds a reference time without determining the amount of dust in a separate microcomputer, power is supplied to the notification unit, thereby reducing the structure and cost.

Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a vacuum cleaner according to a first embodiment, Figure 2 is a perspective view of a vacuum cleaner in a state in which the dust container according to the first embodiment is separated, Figure 3 is a dust separation apparatus according to the first embodiment separated Is a perspective view of a vacuum cleaner in a closed state.

1 to 3, the vacuum cleaner 1 according to the present embodiment includes a main body 10 having a suction motor therein and a main body 10 detachably mounted therein, and removes dust in the air. The dust separator 100 for separating and the dust container 200 is detachably mounted to the main body 10 to allow the dust separated from the dust separator 100 to be stored.

In detail, the main body 10 is provided with a plurality of wheels 12 to facilitate the movement of the main body 10. In addition, a first mounting part 13 for mounting the dust container 200 is formed in the main body 10. In addition, a fixing plate 14 for fixing the dust container 200 is provided on the upper side of the first mounting part 13.

A second mounting portion 18 on which the dust separation apparatus 100 is mounted is formed at an upper portion of the main body 10. In addition, the main body 10 is provided with a cover member 20 for covering the dust separator 100 in a state where the dust separator 100 is mounted to the second mounting portion 18. That is, the cover member 20 forms a part of the outer shape of the cleaner body 10 in a state of covering the dust separator 100.

One end of the cover member 20 is rotatably coupled to the main body 10 by a hinge, and the other end of the cover member 20 is detachably coupled to the fixing plate 14.

The cover member 20 is provided with a coupling button 22 to allow the cover member 20 to be coupled to the fixing plate 14. In addition, an end of the coupling button 22 is selectively caught by the fixing plate 14. In addition, the cover member 20 is provided with a handle 24 for allowing a user to move the body 10.

As the cover member 20 covers the dust separation apparatus 100 as described above, the dust separation apparatus 100 is not visible from the outside, thereby improving the aesthetics. In addition, a part of the dust separator 100 is seated on the fixing plate 14 while the dust separator 100 is mounted on the second mounting unit 18. In addition, an opening 16 is formed in the fixing plate 14 to move the dust separated from the dust separator 100 to the dust container 200. The opening 16 is in communication with the dust discharge portion 114 of the dust separation apparatus 100 to be described later.

In the present embodiment, since the dust separator 100 and the dust container 200 are provided as separate items and detachably mounted to the main body 10, the structure of the dust container 200 can be simplified. It can be lighter. Therefore, since the user only needs to separate the dust container 200 from the main body 10, the user's convenience is enhanced.

On the other hand, the fixing plate 14 is formed with a pair of suction holes 15 for introducing the air containing dust into the dust separation apparatus 100.

The dust separation apparatus 100 is coupled to the cyclone unit 110 and the cyclone unit 110 to separate the dust in the air by the cyclone flow, the air discharged from the cyclone unit 110 It includes a filter unit 150 for filtering.

The cyclone unit 110 includes a first cyclone body 112 and a second cyclone body 120 to which the first cyclone body 112 is rotatably coupled. That is, by combining the first cyclone body 112 and the second cyclone body 120, the cyclone unit 110 forms a complete shape.

In addition, a plurality of suction parts 123 are formed in the second cyclone body 120, and a dust discharge part 114 in which dust separated from air is discharged is formed in the first cyclone body 112. . When the dust separator 100 is mounted on the second mounting unit 18, the plurality of suction units 123 communicate with the respective suction holes 15.

4 is a perspective view of the dust container according to the first embodiment, Figure 5 is an exploded perspective view of the dust container according to the first embodiment, Figure 6 is a cross-sectional view taken along the line A-A of FIG.

4 to 6, in the dust container 200, a dust collecting body 210 in which a dust storage unit 211 in which dust is stored is formed, and a cover member coupled to an upper side of the dust collecting body 210. 250).

In detail, the dust collecting body 210 is formed with a handle 212 that the user can hold. In addition, the handle 212 is provided with a coupling lever 214 to be selectively coupled to the fixing plate 14.

The cover member 250 has a dust inlet 252 through which the dust separated from the dust separator 100 is introduced. In addition, the dust inlet 252 communicates with the opening 16 of the fixing plate 14.

On the other hand, the inside of the dust collecting body 210 includes a plurality of pressing members for pressing the dust stored in the dust storage unit 211.

The plurality of pressing members include a first pressing member 220 provided to be movable on the dust collecting body 210 and a second pressing member 230 integrally formed with the dust collecting body 210. The first pressing member 220 may be rotated in both directions, for example, inside the dust collecting body 210.

The second pressing member 230 may be integrally formed with the fixed shaft 232 protruding upward from the bottom surface of the dust collecting body 210. In addition, the second pressing member 230 may be integrally formed with the bottom surface of the dust collecting body 210 or the inner circumferential surface of the dust collecting body 210.

The first pressing member 220 includes a pressing plate 221 for pressing dust by interaction with the second pressing member 230, and a rotation shaft 222 connected to the pressing plate 221. The pressure plate 221 may be integrally formed with the rotation shaft 222. In addition, the rotation shaft 222 is coupled to the fixed shaft 232. A portion of the rotating shaft 222 is inserted into the fixed shaft 232 above the fixed shaft 232.

On the other hand, the first pressing member 220 is rotated by a drive device. In detail, the driving device includes a driving source for generating a driving force, and a power transmission unit for transmitting the driving force of the driving source to the first pressing member 220. As the driving source, a compression motor (see 570 of FIG. 9) may be applied.

The power transmission unit drives a driving gear 410 coupled to the rotating shaft 222 of the first pressing member 220 and a driving force of the compression motor (see 570 of FIG. 9) to the driven gear 410. Gears (see 420 in FIG. 8) are included. In addition, the driving gear (see 420 of FIG. 8) is coupled to the rotating shaft of the compression motor (see 570 of FIG. 9) and rotated by the compression motor.

Thus, when the compression motor (see 570 of FIG. 9) is rotated, the drive gear (see 420 of FIG. 8) coupled with the compression motor (see 570 of FIG. 9) is rotated. The rotational force of the compression motor is transmitted to the driven gear 410 by the driving gear (see 420 of FIG. 8) to rotate the driven gear 410, and finally, by the rotation of the driven gear 410. The first pressing member 220 is rotated.

7 is a perspective view illustrating a lower structure of a driven gear according to a first embodiment, and FIG. 8 is a perspective view showing a part of a first mounting part according to a first embodiment.

6 to 8, the driven gear 410 includes a gear body 411. A plurality of gear teeth 416 are formed around the circumference of the gear body 411. In addition, a gear shaft 412 protrudes upward from the central portion of the gear body 411.

The gear shaft 412 of the driven gear 410 is coupled to the rotary shaft 222 of the first pressing member 220 below the dust collecting body 210. As the shaft 412 of the driven gear 410 is coupled to the rotation shaft 222 of the first pressing member 220 at the lower side of the dust collecting body 210, the driven gear 410 is the dust collecting body. It is exposed to the outside of 210.

A protrusion 413 is formed on the lower surface of the gear body 411. The protrusion 413 is formed circumferentially on the lower surface of the gear body 411. At this time, the angle formed by the protrusion 413 around the gear shaft 412 of the driven gear 410 is smaller than 360 degrees. For example, the angle formed by the protrusion 413 may be 240 degrees.

That is, the protrusion 413 forms an open curve. Then, when viewed as the entire driven gear, the portion where the protrusion 413 is not formed may be understood as forming the groove 414. The protrusion 413 and the groove 414 are used to turn on or off the micro switch to be described later.

On the other hand, the compression motor (see 570 of FIG. 9) is provided inside the first mounting portion 13, the drive gear 420 is coupled to the shaft of the compression motor (see 570 of FIG. 9) 1 is provided on the bottom surface of the mounting portion (13).

A portion of the outer circumferential surface of the driving gear 420 is exposed to the outside from the bottom of the first mounting portion 13. In addition, an opening 13a is formed at the bottom of the first mounting part 13 to expose a part of the outer circumferential surface of the driving gear 420 to the first mounting part 13.

As the driving gear 420 is exposed to the first mounting portion 13, when the dust container 200 is mounted on the first mounting portion 13, the driven gear 410 is driven by the driving gear 420. Meshes with.

The first mounting portion 13 is provided with a detection unit for detecting the rotation of the driven gear. In one embodiment, the sensing unit may be a micro switch (see 440 of FIG. 9). The micro switch (see 440 of FIG. 9) includes a contact (not shown) and a terminal portion 442 for selectively pressing the contact. Since the micro switch may use a known structure, a detailed description thereof will be omitted.

In addition, an end portion of the terminal portion 442 is exposed to the outside through the first mounting portion 13.

Therefore, when the protrusion 413 is located above the terminal 442 while the driven gear 410 rotates, the terminal 442 is pressed to press the contact, and the groove 414 is provided. When located above the terminal portion 442, the terminal portion 442 is spaced apart from the contact point.

9 is a block diagram illustrating a control structure of the vacuum cleaner according to the first embodiment.

Referring to FIG. 9, the vacuum cleaner 10 includes a control unit 510, an operation signal input unit 520 for selecting suction power (eg, strong, medium, and weak modes), and an operation signal input unit 520. Driven by the suction motor driver 540 for operating the suction motor 550, the compression motor driver 560 for operating the compression motor 570, and the compression motor 570 according to the input operation mode. A driving gear 420, a driven gear 410 meshed with the driving gear 420, a micro switch 440 for detecting rotation of the driven gear 410, and the micro switch 440. The timer 450 is counted or reset according to the transmitted signal, and whether to operate according to the time counted by the timer 450 is determined, and a notification unit 460 for generating a dust emptying signal to the outside is included. .

In detail, the compression motor is preferably a motor capable of forward rotation and reverse rotation. In other words, the compression motor may be a motor capable of bidirectional rotation. Accordingly, the first pressing member 220 may perform forward rotation (clockwise rotation) and reverse rotation (counterclockwise rotation), and the first pressing member 220 may rotate forward and reverse. 2 Compressed dust is accumulated on both sides of the pressing member 230.

As such, in order to enable forward and reverse rotation of the compression motor, a synchronous motor may be used as the compression motor. The synchro-motor is configured to be capable of forward and reverse rotation by the motor itself, and when the force applied to the motor is greater than or equal to a predetermined value when the motor rotates in one direction, the rotation of the motor is converted to the other direction. .

Meanwhile, when the contact of the micro switch 440 is pressed while the driven gear 410 is rotated, a high signal (first signal) is transmitted from the micro switch 440 to the timer 450 as an example. On the other hand, the contact is not pressed, and a low signal (second signal) is transmitted from the micro switch 440 to the timer 450 as an example. When the high signal is transmitted to the timer 450, the time counted so far in the timer 450 is reset. On the other hand, when the low signal is transmitted to the timer 450 while the timer 450 is reset, the timer 450 starts counting.

Of course, the timer may be configured to start counting when a low signal is transmitted to the timer, and reset when a high signal is transmitted.

The notification unit is determined on / off according to the time counted by the timer 450. As the notification unit, an LED may be used as an example. In the present embodiment, it is noted that the type of the notification unit is not limited. When the LED is used as the notification unit, for notification of the user, the notification unit may be mounted around the dust container to emit light toward the dust container.

FIG. 10 is a view illustrating a connection structure of a timer and a sensing unit for operating the notification unit according to the first embodiment. FIG. 11 is a view illustrating a rotation operation of the first pressing member according to the first embodiment. A graph showing on / off of the micro switch as the rotation time of the first pressing member elapses.

10 to 12, the voltage passing through the driving voltage Vcc and the condenser C is applied to the timer 450. The capacitor C is connected to the resistor R, and the resistor is grounded. The timer is connected between the capacitor (C) and the resistor (R).

The timer 450 is connected to the micro switch 450 and the notification unit 460. Although not shown, the timer 450 includes one or more internal resistors and a comparator. Therefore, after the driving voltage Vcc applied to the timer 450 passes one or more resistances, the voltage decreases, and the reduced voltage is applied to the comparator.

When the driving voltage Vcc is continuously applied to the capacitor C, the driving voltage Vcc is continuously decreased, and the reduced voltage is applied to the comparator. The comparator then compares the two applied voltages.

At this time, the voltage passing through the internal resistance of the timer (which may be referred to as a first voltage value) is kept constant, and the voltage passing through the capacitor (which may be referred to as a second voltage value) continues to decrease. . The comparator determines whether the second voltage value reaches the first voltage value. That is, the timer counts the time when the second voltage value is decreased.

The count at the timer is reset by the signal from the micro switch.

When the microcomputer is reset, the second voltage value is initialized, and the comparator again determines whether the second voltage value reaches the first voltage value.

In the present embodiment, the voltage passing through the capacitor is applied to the timer. However, in contrast, one end of the capacitor is grounded, the other end is connected to the resistor, and the voltage passing the resistor is applied to the resistor. It can also be applied with a timer.

Referring to FIG. 11, one end of the terminal portion 442 of the micro switch may be positioned vertically below the first pressing member when the first pressing member is aligned with the second pressing member.

In the state where the first pressing member is located in the region A and the region B, the protrusion of the driven gear presses the terminal portion of the micro switch, so that the micro switch is turned on. Then, a high signal is applied to the timer at the micro switch. On the other hand, in the state where the first pressing member is located in the region C, since the groove of the driven gear is located above the micro switch, the micro switch is turned off. Then, a high signal is applied to the timer at the micro switch.

While the first pressing member is rotated toward both sides of the second pressing member and the dust is compressed, the micro switch is repeatedly turned on and off as shown in FIG. 12, and thus the timer counts and resets repeatedly. .

When the amount of dust compressed in the dust container is increased, the rotation angle of the first pressing member decreases. When the dust is filled in the A and B regions, the first pressing member moves only in the C region. As such, when the first pressing member moves only in the region C, a low signal is continuously applied to the timer. The timer then continues to count time. When the time counted by the timer passes a reference time (a time when a second voltage value reaches the first voltage value), power is supplied from the timer to the notification unit. In other words, the timer counts the time that the second voltage value decreases.

In this embodiment, the power is supplied to the notification unit when the time counted by the timer exceeds the reference time without determining the amount of dust in a separate microcomputer, thereby reducing the structure and cost.

The reference time may vary as the capacitor and the resistance are varied.

Hereinafter, the dust compression process will be described.

13 is a flowchart for describing a method of controlling a vacuum cleaner according to a first embodiment.

Referring to FIG. 13, it is determined whether a suction motor operation signal is input through the operation signal input unit 520 while the operation of the vacuum cleaner is stopped (S1).

When it is determined that the suction motor operation signal is input, the controller 510 operates the suction motor driver 540 to drive the suction motor 550 according to the suction power selected by the user. Then, the suction motor 550 is operated so that air containing dust is sucked through the suction nozzle by the suction force of the suction motor.

In addition, the air sucked through the suction nozzle is introduced into the cleaner body 10. The air introduced into the cleaner body 10 is distributed to each suction part 123 of the dust separator 100.

The air introduced into the dust separator 100 is separated from the dust during the spiral flow along the inner circumferential surface of the cyclone unit 110. The separated dust is discharged to the dust discharge unit 114, and the dust of the dust discharge unit 114 passes through the opening 16 of the fixing plate 14 and then opens the dust inlet unit 252. It is moved to the dust container 200 through.

On the other hand, the air separated from the dust is discharged from the cyclone unit 110 is moved to the filter unit 150. The air moved to the filter unit 150 is introduced into the cleaner body 10 after being filtered. The air introduced into the cleaner body 10 is discharged to the outside of the cleaner body 10 after passing through the suction motor 550.

As the dust in the air is separated and dust is stored in the dust storage unit 211 as described above, the plurality of pressing members 220 and 230 compress the dust stored in the dust storage unit 211 by interaction. Let's do it.

That is, the controller 510 drives the compression motor 570 to compress the dust stored in the dust container 200 after the suction motor 550 is operated (S3).

Here, although the compression motor 570 is described as being operated after the suction motor 550 is operated in this embodiment, the suction motor 550 and the compression motor 570 may be operated simultaneously.

When the compression motor 570 is driven, the drive gear 420 coupled with the rotation shaft of the compression motor 570 is rotated. When the driving gear 420 is rotated, the driven gear 410 meshed with the driving gear 420 is rotated. When the driven gear 410 is rotated, the first pressing member 220 coupled with the driven gear 410 rotates toward the second pressing member 230 to compress dust.

In the process of rotating the driven gear, the timer 450 determines whether the counted time exceeds the reference time (S4). When the amount of dust stored in the dust container 200 is less than a predetermined amount, the micro switch repeats the on / off, so that the time count and reset are repeated in the timer.

When the amount of dust exceeds a predetermined amount during the process of compressing the dust stored in the dust container, the first pressing member moves only in the region C inside the dust container as described above. Then, in the timer 450, the time count is continued, and when the counted time exceeds the reference time, power is supplied to the notification unit 460. When the notification unit operates, the user can easily check the dust emptying time by recognizing the signal generated from the notification unit.

In this embodiment, since the dust stored in the dust container is compressed by the interaction of the first pressing member and the second pressing member, the amount of dust stored in the dust bucket can be maximized.

In addition, when the amount of dust stored in the dust container 200 reaches a predetermined amount, as the dust emptying signal is generated, the user can easily check the dust emptying time, thereby increasing user convenience.

14 is a cross-sectional view taken along AA of FIG. 5 according to the second embodiment, FIG. 15 is a partial perspective view of the first mounting unit according to the second embodiment, and FIG. 16 is a first pressing member according to the second embodiment. It is a figure explaining the rotation operation | movement of.

This embodiment is the same as the first embodiment in other parts, except that there is a difference between the sensing unit and the sensing target in the sensing unit. Therefore, hereinafter, only characteristic parts of the exemplary embodiment will be described.

14 to 16, the driven gear 610 of the present embodiment includes a gear body 611 in which a plurality of gear teeth are formed, and a gear shaft 612 extending vertically upward of the gear body 611. And, the magnetic member 615 is seated, the cover 616 is coupled to the lower side of the gear body 611 is included.

The gear shaft 612 of the driven gear 610 is coupled to the rotation shaft 222 of the first pressing member 220 at the lower side of the dust collecting body 210.

In addition, a lower portion of the gear body 611 is provided with an accommodating part 614 in which the cover 616 is accommodated while the cover 616 is coupled. The receiving portion 614 is recessed upward from the lower surface of the gear body 611.

The magnetic member 615 is formed in a rectangular bar shape. In addition, the cover has a recess 617 in which the magnetic member 615 is seated in a shape corresponding to that of the magnetic member 615. The seating groove 617 extends in the radial direction at the center of the cover 616. In addition, a guide rib 618 is formed at a part of the circumference of the seating groove 617 to guide the position of the magnetic member.

In addition, the cover 616 is coupled to the lower side of the gear body 611 in a state in which the magnetic member 615 is seated on the cover 616. Therefore, when the gear body 611 is rotated, the magnetic member 615 is rotated with the gear body 611.

On the other hand, the sensing unit 640 for detecting the magnetism of the magnetic member 615 is provided inside the bottom surface of the first mounting portion 13 of the present embodiment. As the sensing unit 640, for example, a hall sensor may be used.

When the magnet of the magnetic member 615 is sensed by the detector 640, a high signal is generated in the detector 640, and a low signal is generated when it is not detected. The signal generated by the detector 640 is transmitted to the timer (see 450 of FIG. 9).

Referring to FIG. 16, the magnetic member is positioned below the first pressing member when the first pressing member is aligned with the second pressing member.

The sensing unit is disposed at a position spaced apart from the first magnetic member when the first pressing member is aligned with the second pressing member. The position of the sensing unit can be clearly understood by FIG. 16.

When the sensing unit detects the magnetic member, the inside of the dust container may be divided into an A region and a B region. At this time, the reference time for determining whether the amount of dust exceeds a predetermined amount is greater than the time for the first pressing member to reciprocate in the B region.

When the amount of dust stored in the dust container 200 is less than a predetermined amount, since the magnetic member is periodically detected by the sensing unit, a time count is repeated in the timer.

When the amount of dust exceeds a predetermined amount during the process of compressing the dust stored in the dust container, the first pressing member moves only in the region B inside the dust container. Then, the time count continues in the microcomputer (see 450 of FIG. 9), and when the counted time exceeds the reference time, power is supplied to the notification unit (see 460 of FIG. 9). When the notification unit is activated, the user can easily check the dust emptying time by recognizing the signal generated from the notification unit.

In the above embodiments, when the foreign matter is caught between the first pressing member and the inner circumferential surface of the dust container, the first pressing member is prevented from moving, and in this case, since the time count continues in the timer, the notification unit may be operated. Therefore, the user can recognize the abnormal operation state of the first pressing member by the signal generated from the notification unit.

1 is a perspective view of a vacuum cleaner according to a first embodiment.

2 is a perspective view of a vacuum cleaner in a state in which the dust container according to the first embodiment is removed.

3 is a perspective view of a vacuum cleaner in a state where the dust separator according to the first embodiment is separated.

4 is a perspective view of a dust container according to the first embodiment;

5 is an exploded perspective view of the dust container according to the first embodiment;

6 is a cross-sectional view taken along the line A-A of FIG.

7 is a perspective view showing a lower structure of the driven gear according to the first embodiment.

8 is a perspective view illustrating a part of a first mounting unit according to the first embodiment.

9 is a block diagram illustrating a control structure of the vacuum cleaner according to the first embodiment.

FIG. 10 is a view illustrating a connection structure of a timer and a sensing unit for operating the notification unit according to the first embodiment; FIG.

11 is a view for explaining the rotational operation of the first pressing member according to the first embodiment.

12 is a graph showing on / off of the micro switch as the rotation time of the first pressing member elapses.

13 is a flowchart for explaining a method of controlling a vacuum cleaner according to a first embodiment.

14 is a cross-sectional view taken along the line A-A of FIG. 5 according to the second embodiment.

15 is a partial perspective view of the first mounting portion according to the second embodiment;

FIG. 16 is a view for explaining a rotation operation of the first pressing member according to the second embodiment. FIG.

Claims (9)

A cleaner body; A dust container detachably mounted to the cleaner body and storing dust; A pressing member movably provided in the dust container to compress the dust stored in the dust container; A power transmission unit transmitting power for moving the pressing member; A timer for counting a time when the urging member moves; A sensing unit for sensing the movement of the power transmission unit and resetting the timer; And The operation is determined according to the time count in the timer, the vacuum cleaner including a notification unit for generating a notification signal to the outside. The method of claim 1, The timer is connected to the notification unit and the detection unit, The vacuum cleaner is selectively applied to the notification unit in the timer. The method of claim 1, The timer is connected between a resistor and a capacitor, A driving voltage is applied to the timer after passing the capacitor or the resistor. The method of claim 3, wherein The driving voltage is directly applied to the timer, The timer includes one or more internal resistors and comparators, The comparator compares a first voltage passing through a resistance inside the timer with a second voltage applied to the timer after passing the capacitor or the resistor. The method of claim 4, wherein The first voltage is fixed, the second voltage is varied over time, The timer counts the time for which the second voltage reaches the first voltage, and when the counted time passes the reference time, the timer is powered by the notification unit from the timer. The method of claim 1, The detecting unit is a vacuum cleaner which is a micro switch provided in the cleaner body. The method of claim 6, The micro switch is turned on or off by the power transmission unit, As the micro switch is turned on or off, the first signal and the second signal are periodically applied to the timer in the micro switch. And when the first signal is applied to the timer, the timer is reset, and when the second signal is applied to the timer, the timer counts time. The method of claim 1, The power transmission unit is provided with a magnetic member, The detector is a vacuum cleaner for detecting the magnetism of the magnetic member. The method of claim 8, The first signal and the second signal are periodically applied from the hall sensor to the micom according to whether or not the hall sensor senses the magnetism of the magnetic member. The timer is reset when the first signal is applied to the microcomputer, the timer counts the time when the second signal is applied to the timer.

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