KR100876699B1 - Vacuum cleaner - Google Patents

Abstract

A vacuum cleaner is provided to prevent the scattering of dust while discharging dust by increasing the dust collecting capacity of a dust collector. A vacuum cleaner for preventing the scattering of dust includes a dust collector(200), a compression member(220) provided to the inside of the dust collector, a dust storage unit(216) formed in the compression member, and a driving unit for rotating the compression member, wherein a first cyclone unit(230) is coupled to the lower part of the cover member to be separated together with the cover member when discharging the dust stored in a dust collection body(210).

Description

Vacuum cleaner {Vacuum cleaner}

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

Figure 2 is a perspective view of a state in which the dust collector is separated from the vacuum cleaner.

3 is a perspective view of a dust collecting device according to the present embodiment.

4 is an exploded perspective view of the dust collecting device.

5 is a cross-sectional view taken along the line II ′ of FIG. 4.

6 is a cross-sectional view taken along the line II-II 'of FIG. 4.

7 is a bottom perspective view of the dust collecting apparatus according to the present embodiment.

8 is a perspective view of a dust collecting device mounting unit according to the present embodiment.

9 is a block diagram showing an apparatus for controlling a vacuum cleaner according to the present embodiment.

10 is a view showing a state in which dust is compressed in the interior of the dust collector.

11 is a view showing a state in which dust is discharged from the dust collector.

<Explanation of symbols for the main parts of the drawings>

200: dust collector 220: compression member

410: driven gear 420: drive gear

430: compression motor

This embodiment relates to a vacuum cleaner in which the dust collecting capacity of the dust collecting apparatus is maximized.

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

The vacuum cleaner may include a suction nozzle for sucking air containing dust, a cleaner body communicating with the suction nozzle, an extension pipe for guiding air sucked from the suction nozzle toward the cleaner body, and air passing through the extension pipe. Includes a connector for connecting to the body. Here, a nozzle suction port having a predetermined size is formed at the bottom of the suction nozzle to allow the air containing the dust accumulated on the floor to be sucked.

On the other hand, the inside of the cleaner body, there is provided a suction motor for generating an air suction force to suck the outside air containing dust to the suction nozzle.

In addition, the dust collector is detachably mounted to the cleaner body to separate and store dust. The dust collector performs a function of separating and storing dust contained in the air sucked from the suction nozzle.

In detail, the dust collecting apparatus includes a dust collecting body, an inlet for allowing air to be sucked into the dust collecting body, a cyclone portion for separating dust from the air sucked into the dust collecting body, and dust separated from the cyclone portion. The dust storage unit and a discharge port through which the dust separated from the cyclone portion is discharged.

When the vacuum cleaner is stopped while the dust separation process is performed in the dust collector, the separated dust is stored in a low density state in the dust storage unit.

According to the conventional dust collector, since the dust stored in the dust storage unit occupies a volume too large for its weight, there is an inconvenience of frequently emptying the dust of the dust collector in order to maintain dust collection performance.

Therefore, in recent years, in order to improve the convenience of cleaner use, efforts have been made to maximize the capacity of dust collected in the dust collecting body and to improve dust collecting performance.

The present embodiment is proposed to solve the above problems, and an object of the present invention is to propose a vacuum cleaner for increasing the dust collecting capacity of the dust collecting apparatus.

In addition, another object of the present embodiment is to propose a vacuum vacuum cleaner in which dust is prevented from scattering in the process of discharging dust.

Vacuum cleaner according to the present embodiment for achieving the object as described above is a dust collecting device; A compression member provided inside the dust collecting device; A dust storage unit formed in the compression member; And a driving device for rotating the compression member, and when the compression member is rotated, the dust stored in the dust storage unit moves to the inner circumferential surface side of the compression member so that dust is accumulated, thereby compressing the dust. do.

According to another aspect of the present invention, a vacuum cleaner includes a compression member in which a dust storage unit in which dust is stored is formed; A plurality of protrusions protruding from an inner surface of the compression member and spaced apart from each other by a predetermined distance; A dust collecting device in which the compression member is received; And a drive device for rotating the compression member.

Hereinafter, this embodiment will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a vacuum cleaner according to the present embodiment, FIG. 2 is a perspective view of a state in which the dust collecting device is separated from the vacuum cleaner, and FIG. 3 is a perspective view of the dust collecting device according to the present embodiment.

1 to 3, the vacuum cleaner 10 according to the present embodiment includes a cleaner body 100 having a suction motor (not shown) for generating a suction force therein, and suctioned by the cleaner body 100. And dust separation means for separating the dust contained in the air.

Although not shown, a suction nozzle for sucking air containing dust and a connection pipe for connecting the suction nozzle to the cleaner body 100 are further included.

In the present embodiment, the basic configuration of the suction nozzle and the connection pipe is the same as the conventional description thereof will be omitted.

In detail, a main body suction part 110 in which air containing dust sucked from the suction nozzle is sucked is formed at the front lower end of the cleaner main body 100, and dust is separated from one side of the cleaner main body 100. The main body discharge part (not shown) is discharged to the outside is formed. In addition, the upper portion of the cleaner body 100 is formed with a body handle 140 to enable the user to grip.

On the other hand, the dust separation means, the dust collecting device 200 is provided with a first cyclone unit (described later) for separating the dust contained in the air introduced into the inside, and the first cyclone unit is primarily The dust is separated again from the air from which the dust is separated, and is composed of a second cyclone unit 300 provided in the cleaner body 100.

In detail, the dust collecting apparatus 200 is detachably mounted to the dust collecting apparatus mounting unit 170 formed at the front of the cleaner body 100.

As such, the handle 140 of the cleaner body 100 is provided with a detachable lever 142 in order to allow the dust collector 200 to be detachably attached to the cleaner body 100, and the dust collector 200 is provided. There is a locking end 256 that is engaged with the detachable lever 142 is formed.

In addition, the dust collecting apparatus 200 includes a dust collecting body 210 in which a first cyclone unit generating a cyclone flow and a dust storage unit storing dust separated from the first cyclone unit are formed.

Here, the dust collector 200 is detachably mounted to the cleaner body 100 as described above, and as the dust collector 200 is mounted to the cleaner body 100, the dust collector 200 is The cleaner body 100 and the second cyclone unit 300 communicate with each other.

In detail, the cleaner main body 100 has an air outlet 130 through which the air sucked into the cleaner main body 100 is discharged to the dust collecting device 200, and the dust collecting device 200 has the air discharge port. A first air inlet 218 is formed to allow air to enter from 130.

In addition, a first air outlet 252 through which dust separated from the first cyclone part is discharged is formed in the dust collecting device 200, and the first air outlet 252 is formed in the cleaner body 100. A connection flow passage 114 through which air discharged through the air is introduced is formed. In addition, air introduced into the connection channel 114 flows into the second cyclone unit 300.

On the other hand, the second cyclone portion 300 is composed of a plurality of cyclones having a substantially conical shape. In addition, the second cyclone unit 300 is disposed in a state lying down on the rear upper side of the cleaner body 100. That is, the second cyclone unit 300 is disposed in a state inclined at a predetermined angle with respect to the cleaner body 100.

Here, the dust separated from the second cyclone unit 300 is stored in the dust collector 200. To this end, the dust collecting body 210, the dust inlet 254 for the dust separated from the second cyclone portion 300 is introduced, and the dust separated from the second cyclone portion 300 is stored The reservoir is further formed.

That is, the dust storage unit formed in the dust collecting body 210 may include a first dust storage unit in which dust separated by the first cyclone unit is stored, and dust separated by the second cyclone unit 300. And a second dust storage portion to be stored.

On the other hand, the dust collecting device 200 is preferably configured to maximize the dust collecting capacity of the dust stored therein. To this end, it is preferable that a configuration for reducing the volume of dust stored in the dust collector 200 is added to the dust collector 200.

The operation of the vacuum cleaner 10 will be described briefly by the above configuration.

First, when power is applied to the vacuum cleaner 10 and the cleaner body 100 operates, suction force is generated by the suction motor provided therein. In addition, the air containing the dust sucked by the suction nozzle by the suction force is sucked into the dust collector 200 along a predetermined flow path formed in the connection pipe and the cleaner body 100.

Then, when the air containing the dust is sucked into the dust collector 200, the dust is primarily separated by the first cyclone portion. In addition, the separated dust is stored in the dust collecting body 210. On the other hand, the dust is separated air is discharged from the dust collector 200 is introduced into the cleaner main body 100, the inflow into the second cyclone unit 300 by the connection flow path 114 provided in the cleaner main body (100) do.

And, the air introduced into the second cyclone unit 300 is again dust is separated, the separated dust is introduced into the dust collector 200 and stored, the dust separated air is inside the cleaner body 100 After flowing along a predetermined flow path of the finally discharged to the outside through the body discharge.

Hereinafter, the structure of the dust collecting apparatus in which the dust collecting capacity is maximized will be described in detail.

4 is an exploded perspective view of the dust collector, FIG. 5 is a cross-sectional view taken along the line II ′ of FIG. 4, and FIG. 6 is a cross-sectional view taken along the line II-II ′ of FIG. 4.

4 to 6, the dust collecting apparatus 200 according to the present embodiment includes a dust collecting body 210 forming an external shape, and dust is separated from the sucked air, which is selectively accommodated in the dust collecting body 210. It includes a first cyclone portion 230 and a cover member 250 for selectively opening and closing the upper side of the dust collecting body (210).

In detail, the dust collecting body 210 is provided with a dust storage unit for storing the separated dust. The dust storage unit includes a first dust storage unit 214 in which dust separated from the first cyclone unit 230 is stored, and a second dust in which dust separated from the second cyclone unit 300 is stored. Dust storage unit 216 is included.

Here, the dust collecting body 210 is connected to the first wall 211 forming the first dust storage unit 214 and the second dust storage unit 216 in relation to the first wall 211. A second wall 212 that forms is included. That is, the second wall 212 is formed to surround the outer predetermined portion of the first wall 211.

On the other hand, the dust collecting body 210 has an upper end opened so that a user can turn over the dust collecting body 210 to discharge dust, and the cover member 250 is detachable on the upper part of the dust collecting body 210. Combined.

In addition, when the dust stored in the dust collecting body 210 is discharged, the first cyclone portion 230 may be separated from the cover member 250 so as to be separated together with the cover member 250. Combined.

On the other hand, the first cyclone unit 230 is provided with a dust guide flow path 232 for guiding the dust separated from the air to be easily discharged to the first dust storage unit 214. Here, the dust guide flow path 232 is guided to fall downward after the separated dust flows in the tangential direction.

Therefore, the inlet 233 of the dust guide flow path 232 is formed on the side of the first cyclone portion 230, the outlet 234 is formed on the bottom surface of the first cyclone portion 230.

On the other hand, the cover member 250 is detachably coupled to the upper side of the dust collecting body 210 as described above. That is, the cover member 250 opens and closes the first dust storage unit 214 and the second dust storage unit 216 at the same time.

In addition, a discharge hole 251 through which dust separated from the first cyclone part 230 is discharged is formed through the bottom surface of the cover member 250. The upper end of the filter member 260 having a plurality of through holes 262 of a predetermined size is coupled to the discharge hole 251.

Therefore, the air that has undergone the dust separation process in the first cyclone unit 230 is discharged through the filter member 260 to the discharge hole 251.

In addition, a flow path 253 is formed in the cover member 250 to guide the air of the first cyclone part 230 discharged from the discharge hole 251 to the first air outlet 252. . That is, the flow path 253 serves as a passage connecting the discharge hole 251 and the first air outlet 252.

On the other hand, the dust collecting body 210 is provided with a compression member 220 to reduce the volume of dust stored in the first dust storage unit 214, so that the dust collecting capacity is increased.

Here, the compressing member 220 is the dust is compressed in the process of rotating in one direction while the dust is directed to the inner peripheral surface of the compression member 220 by the centrifugal force.

In detail, the compression member 220 may include a rotating body 221 formed in a shape corresponding to a lower side of the inner circumferential surface of the dust collecting body 210, and a plurality of protrusions protruded inward from an inner circumferential surface of the rotating body 221. 222 and a rotating shaft 224 protruding upward from the bottom of the rotating body 221 to provide a center of rotation.

In addition, the rotating body 221 is seated on the lower side of the dust collecting body (210). In addition, the driven gear 410 to be described later on the outside of the dust collecting body 210 is coupled to the rotating body 210 in a state where the rotating body 221 is seated on the lower side of the dust collecting body 210. In addition, a shaft insertion groove 225 for inserting the shaft 411 of the driven gear 410 is formed below the rotating shaft 224.

In addition, the fastening member 228 is fastened on an upper side of the rotation shaft 224 in a state where the shaft 411 of the driven gear 410 is inserted into the shaft insertion groove 225. That is, since the compression member 220 and the driven gear 410 are maintained in a coupled state, when the driven gear 410 is rotated, the rotating body 221 is rotated together.

Here, the first dust storage unit 214 is substantially formed in the inner space of the rotating body 221. That is, in the present embodiment, the first dust storage unit 214 is formed inside the dust collecting body 210, and more specifically, the rotating body 221 is mounted on the dust collecting body 210. It can be described as formed in the inner space of the rotating body 221.

In addition, the plurality of protrusions 222 are formed spaced apart at regular intervals. In addition, the protrusion 222 is formed long in the vertical direction of the rotating body 221.

In addition, the protrusion 222 may be formed to reduce the cross-sectional area from the inner circumferential surface of the rotating body 221 toward the rotation center side of the rotating body 221. For example, the protrusion 222 may be formed in a trapezoidal, triangular, semi-circular, or the like in cross section.

The reason why the cross-sectional area of the protrusion 222 is formed to decrease from the inner circumferential surface of the rotating body 221 toward the rotation center side of the rotating body 221 is to allow the dust to be easily discharged when the compressed dust is discharged. to be.

The space between the protrusions 222 of the first dust storage unit 214 may be defined as a compression space 227 in which dust is compressed.

That is, the dust stored in the first dust storage unit 214 is swept outward from the center of the rotating body 221 by the centrifugal force as the compression member 220 is rotated, the space between the protrusions 222 It is continuously moved to 227 and compressed between the protrusions 222.

In addition to the above configuration, the vacuum cleaner according to the present embodiment is further connected to the driven gear 410 and further includes a driving device for rotating the driven gear 410 and the compression member 220.

7 is a bottom perspective view of the dust collecting apparatus according to the present embodiment, and FIG. 8 is a perspective view of the dust collecting unit mounting portion according to the present embodiment.

7 and 8, a driving device for rotating the compression member 220 includes a compression motor (not shown) for generating a driving force and a driving force of the compression motor to the compression member 220. Power transmission units 410 and 420 are included.

In detail, the power transmission units 410 and 420 include a driven gear 410 coupled with the compression member 220 and a drive gear 420 for transmitting power to the driven gear 410. In addition, the driving gear 420 is coupled to the rotating shaft of the compression motor is rotated by the compression motor.

Therefore, when the compression motor is rotated, the drive gear 420 coupled with the compression motor is rotated, and the rotational force of the compression motor is transmitted to the driven gear 410 by the drive gear 420 to drive the driven drive. The gear 410 is rotated, and finally the compression member 220 is rotated by the rotation of the driven gear 410.

In detail, the driven gear 410 is coupled to the compression member 220 at the lower side of the dust collecting body 210. As the driven gear 410 is coupled to the lower side of the dust collecting body 210, the driven gear 410 is exposed to the outside of the dust collecting body 210.

On the other hand, the compression motor is not shown, but is provided on the lower side of the dust collector mounting portion 170, the drive gear 420 is coupled to the rotary shaft of the compression motor on the bottom surface of the dust collector mounting portion 170 It is provided.

In addition, a portion of the outer circumferential surface of the drive gear 420 is exposed to the outside from the bottom of the dust collector mounting portion 170. To this end, an opening 173 is formed in the dust collector mounting unit 170 to expose a portion of the outer circumferential surface of the drive gear 420 to the dust collector mounting unit 170.

As the driven gear 410 is exposed to the dust collector mounting unit 170, when the dust collector 200 is mounted on the dust collector mounting unit 170, the driven gear 410 is driven by the driving gear 420. ) Is engaged.

On the other hand, the lower side of the dust collecting body 210 is formed with a guide rib 290 for guiding the mounting of the dust collecting device 200 to the cleaner body 100, the dust collector mounting portion 170, the guide rib ( An insertion groove 172 into which the 290 is inserted is formed.

The guide rib 290 is provided in a "C" shape on the outer side of the driven gear 410 to surround a portion of the driven gear 410. Accordingly, the guide rib 290 also serves to protect the driven gear 410.

Here, when the dust collecting device 200 is mounted on the dust collecting device mounting unit 170, the driven gear 410 and the driving gear 420 should be coupled to each other. For this reason, the guide rib 290 is formed so that a portion of the driven gear 410 is exposed to the outside.

On the other hand, below the dust collector mounting portion 170 is provided with a micro switch (to be described later) for detecting the mounting of the dust collector, the dust collector mounting portion 170 is a terminal portion for selectively pressing the contact of the micro switch 442 is exposed.

In detail, an opening 177 is formed in the dust collector mounting unit 170 to expose a portion of the terminal unit 442. In addition, protection ribs are formed at both sides of the opening 177 to protect the exposed terminal. The protective rib includes an inner rib 178 and an outer rib 179.

In addition, the driven gear 410 is formed with a plurality of gear teeth 414 formed in the circumferential direction, and a pressing portion 412 is formed on the lower side to selectively press the terminal portion 442.

Therefore, when the dust collecting device 200 is mounted on the dust collecting device mounting unit 170, the pressing unit 412 presses the terminal portion 442 exposed to the dust collecting device mounting unit 170, thereby collecting the dust collecting device ( 200) is mounted.

Here, an interference prevention groove 416 is formed below the gear teeth 414 to prevent interference with the outer rib 179 when the dust collecting device 200 is mounted.

Therefore, when the dust collecting device 200 is mounted on the dust collecting device mounting unit 170, the outer rib 179 is positioned in the interference preventing groove 416, and the inner rib 178 is the pressing unit ( 412 is located in the space formed by.

9 is a block diagram showing an apparatus for controlling a vacuum cleaner according to the present embodiment.

Referring to FIG. 9, the vacuum cleaner according to the present embodiment includes a control unit 610, an operation signal input unit 620 for selecting dust suction power (eg, strong, medium, or weak mode), and the dust collector. The dust is sucked into the dust collector 200 according to an operation mode (that is, strong, medium, or weak mode) input from the operation signal input unit 620 and the signal display unit 630 displaying whether or not the 200 is mounted. A suction motor driver 640 for operating the suction motor 650 to operate the compressor, and a compression motor driver for operating the compression motor 430 used to pressurize the dust stored in the first dust storage unit 214. 660, a drive gear 420 driven by the compression motor 430, a driven gear 410 rotatingly engaged with the drive gear 420, and whether the dust collector 200 is mounted. A micro switch 440 for sensing is included.

In detail, when the dust collecting device 200 is mounted to the dust collecting device mounting unit 170, the pressing unit 412 of the driven gear 410 presses the terminal unit 442 of the micro switch 440 to the micro switch. 440 is turned on. Then, it is detected that the dust collector 200 is mounted on the dust collector mounting unit 170. In this state, when suction power is input through the operation signal input unit 620, the suction motor 650 is operated, and at the same time the compression motor 430 is operated.

On the other hand, when suction power is input through the operation signal input unit 620 while the dust collector 200 is not mounted to the dust collector mounting unit 170, the micro switch 440 is maintained in an off state. In the signal display unit 630, a signal indicating that the dust collecting apparatus 200 is not mounted is displayed externally.

Although not shown, the signal display unit may be provided to the cleaner main body 100 or the handle, and the signal generated by the signal display unit 630 may be an audio signal or a visual signal. For example, the signal display unit 630 may be a speaker or LED.

Therefore, the suction motor 650 and the compression motor 430 are prevented from operating while the dust collector 200 is not mounted, so that unnecessary operation of the suction motor 650 can be prevented and the dust collector The driving gear 420 may be rotated in a state where the device 200 is not mounted, thereby preventing a user, particularly an infant, from being damaged by the driving gear 420.

Here, the present embodiment detects the mounting of the dust collecting device 200 by the micro switch 440. Alternatively, a pressure sensor or the like may be mounted on the dust collecting device mounting unit 170. In this case, the structure for detecting the mounting of the dust collector 200 is not limited.

Hereinafter, the operation of the vacuum cleaner and the process of compressing the dust stored in the first dust storage unit 214 will be described in detail.

10 is a view showing the dust is compressed in the interior of the dust collecting apparatus, Figure 11 is a view showing the appearance of dust is discharged from the dust collecting apparatus.

10 and 11, when power is applied to the suction motor 650 of the vacuum cleaner, suction power is generated by the suction motor 650, and air containing dust is sucked into the suction nozzle by the suction force. do.

In addition, the air sucked through the suction nozzle is introduced into the cleaner body 100 through the main body suction part 110, and the introduced air is introduced into the dust collector 200 through a predetermined flow path.

In addition, the air introduced into the dust collector 200 is discharged to the cleaner body 100 after the dust separation process. The separated dust is stored in the first dust storage unit 214.

As the dust in the air is separated as described above, the dust stored in the first dust storage unit 214 is rotated so that the dust stored in the first dust storage unit 214 is compressed while the compression member 220 is rotated. .

In detail, when the compression motor 430 is rotated in one direction, the rotational power of the compression motor 430 is transmitted to the driven gear 410 through the drive gear 420, so that the driven gear 410 is Is rotated. In addition, the compression member 220 is rotated in one direction by the rotation of the drive gear 410.

As described above, when the compression member 220 is rotated in one direction (counterclockwise in FIG. 10), dust inside the compression member 220 is directed outward by centrifugal force, that is, the inner circumferential surface of the compression member 220. Toward the compression space 227 between each of the protrusions 222. The dust is compressed in the process of continuously moving the dust into the compression space 227.

In this process, when the operation of the cleaner is stopped by the user, the operation of the suction motor 650 and the compression motor 430 is stopped to end the dust compression process.

Meanwhile, in order to discharge dust stored in the dust collecting body 210 to the outside, the user separates the dust collecting device 200 from the cleaner body 100.

In addition, the cover member 250 to which the first cyclone unit 230 is coupled is separated from the dust collector 200. Then, the dust collecting body 210 is reversed to empty the dust. Then, as illustrated in FIG. 11, the compressed dust between the protrusions 222 of the compression member 220 is discharged to the outside in a lumped state.

Therefore, since the dust is discharged to the outside in a compressed state, there is an effect that the effect of dust is scattered during the dust emptying process.

According to this embodiment as proposed, since the dust stored in the dust collector is compressed by the compression member and the volume thereof is minimized, there is an effect that the capacity of the dust stored in the dust collector is maximized.

In addition, as the dust collecting capacity of the dust collecting device is maximized by the compressing action of the compressing member, the inconvenience that a user frequently needs to empty the dust stored in the dust collecting device is removed.

In addition, since the dust is kept compressed inside the dust collecting apparatus, when the dust is empty, the dust stored inside the dust collecting apparatus is easily discharged to the outside of the dust collecting apparatus, and dust is prevented from being scattered during the emptying process. It is effective.

Claims (10)

cyclone; A compression member provided inside the dust collecting device; A dust storage unit formed in the compression member; And A driving device for rotating the compression member is included, When the compression member is rotated, the dust stored in the dust storage unit is moved to the inner peripheral surface side of the compression member to accumulate dust, thereby vacuum is compressed. The method of claim 1, The compression member may include a rotating body forming the dust storage unit; Vacuum cleaner comprising a plurality of protrusions protruding from the inner peripheral surface of the rotating body. The method of claim 2, The protrusion is formed in the vertical vacuum cleaner. The method of claim 1, The drive device includes a compression motor for generating a driving force; And a power transmission unit configured to transfer the driving force of the compression motor to the compression member. The method of claim 4, wherein And the compression member is selectively connected to the compression motor by the power transmission unit. The method of claim 4, wherein The compression motor is provided to the cleaner body, The power transmission unit, a drive gear coupled to the compression motor, And a driven gear that receives power from the drive gear and is coupled to the compression member. A compression member in which a dust storage unit for storing dust is formed; A plurality of protrusions protruding from an inner surface of the compression member and spaced apart from each other by a predetermined distance; A dust collecting device in which the compression member is received; And And a driving device for rotating the compression member. The method of claim 7, wherein The protruding portion is a vacuum cleaner is formed such that the cross-sectional area is reduced toward the central portion from the inside of the compression member. The method of claim 7, wherein The protruding portion is a vacuum cleaner that is formed long up and down the compression member. The method of claim 7, wherein The drive device includes a drive motor, a drive gear coupled to the shaft of the drive motor, and a driven gear meshing with the drive gear and coupled to the rotation shaft of the compression member.

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