KR101349204B1

KR101349204B1 - A vacuum cleaner

Info

Publication number: KR101349204B1
Application number: KR1020070059485A
Authority: KR
Inventors: 오장근; 류시창; 이진곤; 차승용; 김민하
Original assignee: 삼성전자주식회사
Priority date: 2007-04-30
Filing date: 2007-06-18
Publication date: 2014-01-10
Also published as: KR20080097105A; KR20080097107A; KR20080097108A; KR20080097106A; KR101309796B1; KR20080097104A; KR20080097109A; KR20080097110A; KR101370822B1

Abstract

A vacuum cleaner is disclosed. Vacuum cleaner according to the present invention, the cyclone unit for separating dust by the centrifugal force from the air sucked on the surface to be cleaned; A dust collecting unit having a dust collecting chamber for receiving dust separated from the cyclone unit; And a compression unit for compressing the dust contained in the dust collecting chamber. The vacuum cleaner including the cyclone dust collecting unit provided with the compression unit includes: a driving unit for rotating the driving shaft; And a compression plate driven in a direction perpendicular to the drive shaft as the drive shaft rotates to compress the dust contained in the dust collecting chamber. According to the present invention, it is possible to provide a vacuum cleaner capable of maximizing the dust compression force provided by the compression unit while minimizing the space allocated to the compression unit for compressing the dust contained in the dust collecting unit.

Vacuum cleaner, dust, compression, compression plate, screw, connecting rod, filter element, filtering

Description

Vacuum cleaner {A VACUUM CLEANER}

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

FIG. 2 is a perspective view of a cyclone dust collecting unit, an electric wire winding unit, and a filter cleaning unit provided in the vacuum cleaner main body of FIG. 1.

3 is a perspective view of the cyclone dust collecting unit of FIG. 2 viewed from another direction.

FIG. 4 is a cross-sectional view of the cyclone dust collecting unit, the wire winding unit, and the filter cleaning unit of FIG. 2.

5 is a perspective view of a compression unit provided in the cyclone dust collecting unit of FIG.

6 is a schematic view showing a state before dust compression is performed in the cyclone dust collecting unit of FIG.

FIG. 7 is a schematic view showing a state after dust compression is performed in the cyclone dust collecting unit of FIG. 3.

8 is a schematic view for explaining a state in which the filter cleaning unit of FIG.

DESCRIPTION OF THE RELATED ART [0002]

10: vacuum cleaning base 20: extension euro

30: suction assembly 40: cyclone dust collecting unit

41: filter member 42: inlet

43: discharge path 45: small dust collection chamber

50 cyclone part 51: separation chamber

60: dust collector 61: dust chamber

70: compression section 71: screw

72: driving unit 73: driving motor

74: torque transmission unit 75: main gear

76: driven gear 77: compression plate

78: connecting portion 78e: first connecting rod

78f: second connecting rod 80: electric wire winding unit

81: winding member 82: winding gear

90: filter cleaning unit 91: cleaning screw

91a: cleaning rib 92: cleaning gear

The present invention relates to a vacuum cleaner, and more particularly, to a vacuum cleaner capable of maximizing the dust compressive force provided by the compression unit while minimizing the space allocated to provide a compression unit for compressing the dust contained in the dust collecting unit.

In general, a vacuum cleaner is a device that sucks dirt and the like existing on the surface to be cleaned by using a suction force.

In such a vacuum cleaner, dirt, such as dust, is separated from the sucked air and collected in a predetermined space. Various techniques for separating dirt and the like from intake air have been applied to a vacuum cleaner, one of which is a cyclone method. In the cyclone method, the intake air has a rotational flow in a predetermined space, whereby dirt and the like are separated from the intake air by centrifugal force. The vacuum cleaner to which the cyclone method is applied typically includes a cyclone part for separating dust from the suction air for rotating flow of the suction air, and a dust collecting part for receiving the dust separated from the cyclone part.

Korean Patent No. 606794 discloses a technology for compressing dust contained in a dust collecting part by driving a pressure plate up and down. By compressing the dust contained in the dust collector as described above, there is an advantage that does not have to discharge the dust contained in the dust collector to the outside for a long time. And in the Republic of Korea Patent No. 606794, the rod-shaped flanger is vertically coupled to the center of the pressure plate, the flanger is driven up and down by the user's operation or the solenoid. At this time, as the pressure plate is driven up and down in the dust collector, a portion of the rod-shaped flanger is allowed to enter and exit the dust collector by the displacement of the pressure plate.

The vacuum cleaner having such a configuration requires not only a space for providing a dust collecting part therein but also a moving space of the flanger corresponding to the maximum displacement of the pressure plate. As a result, the vacuum cleaner has to allocate a relatively large space internally in order to have a structure for compressing the dust contained in the dust collecting unit, which causes a problem that the vacuum cleaner becomes large in volume. In addition, in the case where a large amount of dust is accommodated in the dust collector, it is necessary to provide a large compressive force to the pressure plate. However, there is a limit in providing a large compression force to the pressure plate by driving the rod-type flanger.

The present invention has been made to solve the above problems, it is an object of the vacuum cleaner to maximize the dust compression force provided by the compression unit while minimizing the space allocated to provide a structure for compressing the dust contained in the dust collector. .

According to the present invention, there is provided a cyclone unit for separating dust by centrifugal force from air sucked on a surface to be cleaned; A dust collecting unit having a dust collecting chamber for receiving dust separated from the cyclone unit; And a compression unit for compressing the dust contained in the dust collecting chamber. The vacuum cleaner having a cyclone dust collecting unit provided therein, the compression unit comprising: a driving unit for rotating the driving shaft; And a compression plate which is driven in a direction perpendicular to the drive shaft as the drive shaft rotates to compress the dust contained in the dust collecting chamber.

Here, the compression unit is coupled to the drive shaft in a straight line and driven to rotate with the drive shaft; And a connecting part connected to each of the screw and the compression plate to transfer the rotational force of the screw to the compression plate.

And, the screw,

The horizontally arranged on the upper side of the dust collector and a thread is formed in different directions on both sides of the center in the longitudinal direction, the compression plate may be driven up and down in the dust chamber as the screw rotates.

In addition, the connecting unit may include: first and second driving sliders each provided at a place where threads are formed in different directions on the screw and sliding in opposite directions as the screw rotates; First and second driven sliders respectively positioned on the lower side of the first and second driving sliders and sliding on an upper surface of the compression plate; First connecting rods whose ends are hinged to the first driving slider and the second driven slider, respectively; And a second connecting rod both ends hinged to the second driving slider and the first driven slider, respectively.

The first connecting rod and the second connecting rod may be hinged to each other at a point where they cross each other.

In addition, first and second guides for guiding sliding of the first and second driven sliders may be provided on an upper surface of the compression plate.

And, the drive unit, a drive motor for generating a rotational force; A drive shaft driven to rotate by the drive motor; And a rotational force transmission unit configured to transmit a rotational force of the drive motor to the drive shaft.

In addition, the rotational force transmission unit, the main gear rotationally driven by the drive motor; And a driven gear that rotates in engagement with the main gear and drives the drive shaft, wherein the driven gear may have a smaller number of gears than the main gear.

The cyclone unit and the dust collector may share one partition and be disposed in parallel with each other.

In addition, the partition wall, one side of the upper end may be opened so that the dust separated from the cyclone portion can be introduced into the dust collector.

The cyclone dust collecting unit may further include a filter member installed on an outer case of the cyclone dust collecting unit and filtering residual dust from air flowing out of the cyclone dust collecting unit after dust is separated from the cyclone dust collecting unit. Can be.

The vacuum cleaner may further include: a wire winding unit in which a wire for applying power to the vacuum cleaner from the outside is wound; And a filter cleaning unit which rotates by receiving rotational force from the wire winding unit when the electric wire is drawn out from the electric wire winding unit and shakes off dust accumulated on the filter member.

The wire winding unit may include a cylindrical winding member in which the wire is wound; And

And a winding gear coupled to one end of the winding member and rotatably coupled with the winding member, wherein the filter cleaning unit contacts the filter member on an outer circumferential surface thereof to shake off dust accumulated on the filter member. Spirally projected cleaning screws; And a cleaning gear coupled to one end of the cleaning screw to rotate in engagement with the winding gear to rotate the cleaning gear.

In addition, the cyclone dust collecting unit may further include a small dust collecting chamber for receiving the dust that the cleaning screw shakes off from the filter member.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a vacuum cleaner according to an embodiment of the present invention, Figure 2 is a perspective view of a cyclone dust collecting unit, a wire winding unit and a filter cleaning unit provided in the vacuum cleaner body of Figure 1, Figure 3 is 4 is a perspective view of the cyclone dust collecting unit viewed from another direction, and FIG. 4 is a cross-sectional view of the cyclone dust collecting unit, the wire winding unit, and the filter cleaning unit of FIG. 2, and FIG. 5 is a perspective view of the compression unit provided in the cyclone dust collecting unit of FIG. 3. .

Referring to FIG. 1, the vacuum cleaner 1 of the present embodiment includes a vacuum cleaning body 10, an extension passage 20, and a suction structure assembly 30. The vacuum cleaning body 10 generates suction power through a suction motor (not shown) provided therein, and the suction structure assembly 30 sucks dust on the surface to be cleaned using the suction force generated by the vacuum cleaning body 10. These vacuum cleaning body 10 and the suction structure assembly 30 are connected by an extension passage 20. The extension passage 20 may include a handle 21, a suction hose 22 connecting the handle 21 and the vacuum cleaning body 10, and the handle 21 to be easily gripped and operated by the user. An extension tube 23 is connected to the suction structure assembly 30.

2 to 5, the vacuum cleaning base 10 includes a cyclone dust collecting unit 40 for separating and accommodating dust from intake air. The cyclone dust collecting unit 40 includes a cyclone portion 50 for separating dust from the air sucked on the surface to be cleaned by centrifugal force, and a dust collecting chamber 61 for receiving dust separated from the cyclone portion 50. A dust collecting unit 60 and a compressing unit 70 for compressing the dust contained in the dust collecting chamber 61 are provided.

The cyclone unit 50, by inducing the intake air introduced into the separation chamber 51 of the inside through the inlet (42, Fig. 2 and 4) formed on one side of the cyclone unit 40 to have a rotational flow Separate dust from intake air. If the intake air has a rotational flow as described above, the dust contained in the intake air can be separated from the intake air by centrifugal force.

In addition, the suction air from which the dust is separated while temporarily staying in the separation chamber 51 loses the centrifugal force and exits the cyclone dust collecting unit 40 through the discharge passage 43 formed above the separation chamber 51. At this time, the suction air meets the filter member 41 installed on the outer case 45 of the cyclone dust collecting unit 40 at the end of the discharge passage 43. The filter member 41 filters the dust remaining in the suction air.

The dust collector 60 shares one cyclone portion W with the cyclone portion 50 and is disposed adjacent to the cyclone portion 50 in parallel. An opening S having a predetermined height is provided at an upper end of the partition wall W so that the dust separated from the cyclone part 50 can flow into the dust collecting chamber 61 in the dust collecting part 60 through the opening S. do. As the dust moves from the cyclone part 50 to the dust collecting part 60 through the opening S located above the partition wall as described above, the compression plate 77 provided in the dust collecting part 60 is in a state of being raised to the maximum. Keep it.

The compression unit 70 compresses the dust contained in the dust collecting chamber 61 of the dust collecting unit 60 to minimize the volume of the dust contained therein, so that dust can be accommodated for a long time even with a limited volume of the dust collecting chamber 61. Do it.

Referring to FIG. 5, the compression unit 70 includes a screw 71 horizontally disposed above the dust collecting unit 60, a driving unit 72 for rotating the driving shaft 73a, and a screw 71 rotating. By connecting to the compression plate 77 is driven up and down in the dust collecting chamber 61, and the screw 71 and the compression plate 77, respectively, to transfer the rotational force of the screw 71 to the compression plate 77 The part 78 is provided.

The screw 71 is formed with threads in different directions on both sides with respect to the center in the longitudinal direction. That is, referring to FIG. 5, a first screw 71a having a thread in one direction is provided on the left side and a second screw 71b having a thread in the other direction on the left side. .

The drive unit 72 is provided adjacent to one side of the screw 71, the drive motor 73 for generating a rotational force, the drive shaft 73 is rotated by the drive motor 73 and coupled to the screw 71 in a straight line (73a) And a rotational force transmission unit 74 for transmitting the rotational force of the drive motor 73 to the drive shaft 73a. In addition, the rotational force transmitting unit 74 includes a main gear 75 that is rotationally driven by the drive motor 73, and a driven gear 76 that rotates in engagement with the main gear 75 and drives the screw 71. do. In this case, the driven gear 76 preferably has a smaller number of gears than the main gear 75. This is because greater rotational force can be transmitted to the screw 71 for the output of the same drive motor 73.

The compression plate 77 is provided as a plate having a predetermined thickness and corresponds to the cross section of the dust collecting chamber 61, and moves up and down in the dust collecting chamber 61 to compress the dust contained in the dust collecting chamber 61. The upper surface of the compression plate 77 is provided with first and second guides 77a and 77b for guiding sliding of the first and second driven sliders 78c and 78d described later.

The connecting portion 78 is defined by the first and second driving sliders 78a and 78b and the first and second driving sliders 78a and 78b sliding in opposite directions as the screw 71 rotates. The first and second driven sliders 78c and 78d respectively positioned on the side and sliding on the upper surface of the compression plate 77, and both ends are hinged to the first driving slider 78a and the second driven slider 78d, respectively. The first connecting rod 78e and the second connecting rod 78f hinged to the second driving slider 78b and the first driven slider 78c, respectively.

As described above, the screw 71 has a first screw 71a and a second screw 71b in which threads in opposite directions are formed. The first drive slider 78a is screwed with the first screw 71a, and the second drive slider 78b is screwed with the second screw 71b. As such, the first and second drive sliders 78a and 78b are coupled to the first and second screws 71a and 71b having threads formed in opposite directions to each other, so that the screws 71 slide in opposite directions when the screw 71 rotates. Done.

The first and second driven sliders 78c and 78d are slid along the upper surface of the compression plate 77 while being guided by the first and second guides 77a and 77b respectively provided on the compression plate 77. . During this sliding, the first driven slider 78c is located at the forward side of the first drive slider 78a, and the second driven slider 78d is located at the forward side of the second drive slider 78b.

The first connecting rod 78e and the second connecting rod 78f are hinged to each other at points where they cross each other. As the screw 1 rotates, the angle between the first connecting rod 78e and the second connecting rod 78f is varied. That is, when the screw 1 rotates in one direction and the first and second driving sliders 78a and 78b are closest to each other, the angle between the first connecting rod 78e and the second connecting rod 78f is different. At about 0 degrees, the compression plate 77 is in a state of being lowered to the maximum. In addition, when the screw 1 rotates in the other direction so that the first and second driving sliders 78a and 78b are spaced apart to the maximum, the angle between the first connecting rod 78e and the second connecting rod 78f may be reduced. The compression plate 77 is at the maximum raised state.

2 and 4, the vacuum cleaner main body 10 further includes a wire winding unit 80 on which a wire C for applying power to be used for the vacuum cleaner 1 is wound, and a wire winding unit 80. The filter cleaning unit 90 is provided with a rotational force from the filter unit 40 to shake off the dust from the filter member 41 provided in the cyclone dust collecting unit 40.

The wire winding unit 80 has a cylindrical winding member 81 in which a wire is wound and a winding gear 82 coupled to one end of the winding member 81 to be rotatable with the winding member 81. Equipped. Here, the winding member 81 is a member in which an electric wire C (see FIG. 4) for applying power required for driving to the vacuum cleaner 1 is wound. When the user pulls one end of the electric wire C wound on the winding member 81 to use the vacuum cleaner 1, the winding member 81 rotates in one direction and at the same time, the wire ( C) is withdrawn. At this time, the winding gear 82 coupled to the winding member 81 is also rotated together.

The filter cleaning unit 90 includes a cleaning gear 92 which meshes with the winding gear 82 to rotate, and a cleaning screw 91 having a cleaning rib 91a formed on an outer circumferential surface thereof. Thus, the cleaning gear 92 meshed with the take-up gear 82 also rotates while the user draws the wire C from the take-up member 81. At the same time, the cleaning screw 91 coupled with the cleaning gear 92 also rotates. At this time, the cleaning rib 91a formed on the outer circumference of the cleaning screw 91 hits the outer side of the filter member 41, and dust blown on the inner surface of the filter member 41 is shaken off by such a hit.

In order to accommodate dust dusted off from the filter member 41 by this process, the above-mentioned cyclone dust collecting unit 40 is provided with a small dust collecting chamber 44 (see FIG. 4) separately.

Hereinafter, the operation of the vacuum cleaner 1 of the present embodiment having the above configuration will be described with reference to FIGS. 4 and 6 to 8.

FIG. 6 is a schematic view showing a state before dust compression is performed in the cyclone dust collecting unit of FIG. 3, and FIG. 7 is a schematic view showing a state after dust compression is performed in the cyclone dust collecting unit of FIG. 8 is a schematic view for explaining a state in which the filter cleaning unit of FIG.

When the vacuum cleaner 1 is operated and air containing dust is sucked through the suction structure assembly 30 from the surface to be cleaned, this suction air is introduced into the vacuum cleaner main body 10 through the extension passage 20.

Referring to FIG. 4, the suction air introduced into the vacuum cleaner body 10 is introduced into the cyclone dust collecting unit 40 provided in the vacuum cleaner body 10. Intake air introduced into the cyclone dust collecting unit 40 has rotational flow in the separation chamber 51 of the cyclone part 50. Since the intake air has rotational flow in the separation chamber 51, the dust contained in the intake air is separated by centrifugal force. After dust is separated from the intake air, the intake air loses the centrifugal force and exits the cyclone dust collecting unit 40 through the discharge passage 43 formed above the separation chamber 51. At this time, the suction air meets the filter member 41 provided on the outer case 45 of the cyclone dust collecting unit 40 at the end of the discharge path 43, the filter member 41 is dust remaining in the suction air To filter.

The dust separated from the suction air by the centrifugal force in the separation chamber 51 is introduced into the dust collecting chamber 61 in the dust collecting unit 60 through the opening S formed at the upper end of the partition wall W. As shown in FIG. At this time, the compression plate 77 provided in the dust collecting chamber 61 is maintained in the state raised to the maximum, as shown in FIG. When the user wants to compress the dust contained in the dust collecting chamber 61, the user operates the driving motor 73 provided in the compression unit 70. As the driving motor 73 is operated, the screw 71 provided horizontally above the dust collecting chamber 61 also rotates together.

Then, as shown in FIG. 7, the first and second driving sliders 78a and 78b slidably coupled to the first and second screws 71a and 71b slide in a direction approaching each other. At this time, the first and second connecting rods 78e and 78f which are hinged to the first and second drive sliders 78a and 78b are driven to reduce the angle θ therebetween. In addition, the second and first driven sliders 78d and 78c hinged to the first and second connecting rods 78e and 78f slide on the upper surface of the compression plate 77 in a direction close to each other, and the dust collecting chamber ( Lower the compression plate 77 located at the top of the 61. When the compressing plate 77 descends, the dust contained in the dust collecting chamber 61 is compressed under the compressive force applied by the compressing plate 77.

As such, when the compression plate 77 is driven up and down through the screw 71 and the connecting rods 78e and 78f, it is possible to provide a relatively large compression force to the compression plate 77. Because the compression plate 77 is provided with the driving force of the drive motor 73 through the two connecting rods (78e, 78f), when the compression plate 77 is lowered, two connections to the compression plate 77 This is because the force of the rods 78e and 78f can be applied.

In addition, since the movement of the connecting rods 78e and 78f is almost performed in the dust collecting chamber 61, the vacuum cleaner 1 is provided with a compression unit 70 for compressing the dust in the dust collecting chamber 61. Can be high. This feature is particularly prominent when compared to the case of compressing dust while driving a rod-type plunger vertically coupled to the compression plate 77. This is because such a flanger is forced to enter and exit the dust collecting chamber 61 with the same displacement as that of the compression plate 77.

On the other hand, the dust accumulated inside the filter member 41 may be shaken off while the electric wire C (see FIG. 4) is drawn out before the vacuum cleaner 1 is operated. As described above, the winding member 81 and the winding gear 82 (refer to FIG. 2) rotate together in the process of drawing the wire C from the winding member 81 (see FIG. 2), and at the same time the winding gear 82 ) Also rotates the cleaning gear 92 engaged. Then, as shown in FIG. 8, the cleaning screw 91 coupled with the cleaning gear 92 also rotates, and the cleaning rib 91a formed on the outer circumferential surface of the cleaning screw 91 is disposed on the outer surface of the filter member 41. Will be hit. Therefore, dust blown out of the inside of the filter member 41 is shaken off by such a blow, and then is lowered and accommodated in the small dust collecting chamber 44 provided in the cyclone dust collecting unit 40.

As such, by providing the cleaning screw 91 which interlocks with the winding member 81 in the process of drawing out the electric wire C and automatically shakes off the dust collected on the filter member 41, the user filters the filter member 41. The convenience of not having to shake off the dust directly can be provided.

As described above, according to the present invention, it is possible to provide a vacuum cleaner capable of maximizing the dust compression force provided by the compression unit while minimizing the space allocated to the compression unit compressing the dust contained in the dust collecting unit.

In addition, according to the present invention, since dust dusted on the filter member is automatically shaken off in the process of drawing out the electric wire, a user can provide a vacuum cleaner that can reduce the trouble of directly shaking dust on the filter member. have.

Claims

A cyclone portion for separating dust from the air sucked on the surface to be cleaned by centrifugal force; A dust collecting unit having a dust collecting chamber for receiving dust separated from the cyclone unit; And a compression unit for compressing the dust contained in the dust collecting chamber.

Wherein the compression unit comprises:

A screw disposed horizontally above the dust collecting part, the screw including a first screw having a screw thread and a second screw having a thread opposite to the screw thread;

A drive unit for rotating the screw;

Compression plate for compressing the dust accommodated in the dust chamber up and down as the screw rotates; And

And a connecting part connecting the screw and the compression plate.

The connecting unit,

A first connecting rod slidably connected to an upper surface of the first screw and the compression plate; And

And a second connecting rod slidably connected to an upper surface of the second screw and the compression plate, the second connecting rod being hinged at an intersection point with the first connecting rod.

delete

The method of claim 1, wherein the connecting unit,

A first driving slider sliding along the first screw and connected to one end of the first connecting rod as the screw rotates;

A second drive slider sliding along the second screw as the screw rotates and connected to one end of the second connecting rod;

A first driven slider sliding on an upper surface of the compression plate as the screw rotates and connected to the other end of the second connecting rod; And

And a second driven slider sliding on the upper surface of the compression plate as the screw rotates and connected to the other end of the first connecting rod.

delete

The method of claim 4, wherein the upper surface of the compression plate,

Vacuum cleaner, characterized in that the first and second guides for guiding the sliding of the first and second driven sliders are provided.

The method of claim 1, wherein the driving unit,

A drive motor generating a rotational force; And

And a rotational force transmission unit for transmitting the rotational force of the drive motor to the screw.

The method of claim 7, wherein the rotational force transmission unit,

A main gear rotated by the drive motor; And

And a driven gear that rotates in engagement with the main gear and drives the screw.

And the driven gear has a smaller number of gears than the main gear.

The method of claim 1, wherein the cyclone and the dust collecting unit,

A vacuum cleaner, characterized in that one partition wall is shared in parallel with each other.

The method of claim 9, wherein the partition wall,

Vacuum cleaner, characterized in that the one side of the upper end is opened so that the dust separated from the cyclone portion can be introduced into the dust collector.

The cyclone dust collecting unit of claim 1, wherein

And a filter member installed on an outer case of the cyclone dust collecting unit and filtering residual dust from air flowing out of the cyclone dust collecting unit after dust is separated from the cyclone dust collecting unit.

The method of claim 11, wherein the vacuum cleaner,

An electric wire winding unit in which an electric wire for applying power to the vacuum cleaner from the outside is wound; And

And a filter cleaning unit which rotates when the electric wire is drawn out from the electric wire winding unit and receives a rotational force from the electric wire winding unit, and shakes off dust accumulated on the filter member.

13. The method of claim 12,

The wire winding unit,

A cylindrical winding member in which the wire is wound; And

And a winding gear coupled to one side end of the winding member and rotatably coupled with the winding member.

The filter cleaning unit,

A cleaning screw protruding in a spiral from a cleaning rib contacting an outer circumferential surface of the filter member to shake off dust accumulated on the filter member; And

And a cleaning gear coupled to one end of the cleaning screw to rotate in engagement with the winding gear to rotate the cleaning screw.

The method of claim 13, wherein the cyclone dust collecting unit,

And a small dust collecting chamber for receiving the dust, which the cleaning screw shakes off from the filter member.