KR20010049141A - Vacuum cleaner - Google Patents

Abstract

PURPOSE: A vacuum cleaner is provided, whose dust bag is removed, by bagging the dust through the centrifugal force, so troublesome works of periodic exchanges is excluded and the maintaining cost is reduced. CONSTITUTION: A dust bagged can(73), which is formed in a dust collecting room, has an injection port and an outer open hole an inspiration port(72) connected with an injection port and an outer open hole. A guide duct(61) guides the air discharged through the outer open hole of the dust bagged can into a load driving room. A filter(74) is rotatably installed on the opening area of the dust bagged can. A rotating device rotates the filter and consists of a bearing, which rotates the filter to the shaft direction, a rotating pan(81), which is installed oppositely with the filter, and a rotary shaft(83), which connects the rotating pan with the filter.

Description

Vacuum cleaner {Vacuum cleaner}

The present invention relates to a vacuum cleaner, which removes dust bags collected by separating dust from dust-containing air sucked through an inlet, thereby eliminating trouble caused by periodic replacement and reducing maintenance costs. It is about a vacuum cleaner that can be used.

Vacuum cleaners generally have a dust bag housed interchangeably in a dust chamber. The dust-containing air sucked through the inlet passes through the dust bag. At this time, the dust does not pass through the fine passage hole formed in the dust bag and is collected inside, and only air flows out.

By the way, in such a conventional vacuum cleaner, when the amount of dust collected in the dust bag increases, the suction force for air suction is not only lowered, but also causes an overload of the drive motor, and thus it should be replaced regularly. Therefore, a so-called cyclone vacuum cleaner has been proposed to improve the inconvenience caused by frequent replacement of the dust bag and to increase the filtering effect.

1 is a perspective view of a conventional cyclone vacuum cleaner, Figure 2 is a partially enlarged cross-sectional view of FIG. The conventional cyclone vacuum cleaner 1 is a cleaning main body 3 having an inlet 11, a dust container 21 detachably coupled to the front surface of the cleaning main body 3, and an expansion and contraction coupled to the inlet 11. It consists of the pipe | tube 7 and the brush 15 couple | bonded with the front-end | tip part of the expansion-contraction pipe | tube 7. The cleaning main body 3 has a suction motor 13 for sucking external air into the dust container 21 through the suction port 11, and an opening / closing cover for rotating and opening the opening of the dust container 21 coupled to the front surface. Has (5).

Inlet 11 is formed in the front region of the opening and closing cover (5). In the lower region of the opening / closing cover 5, a guide duct 17 for guiding the air discharged from the dust container 21 to the passage hole 6 of the load driving chamber 4 is provided. The guide duct 17 rotates integrally with the opening / closing cover 5 so that the guide duct 17 can be fastened to the upper surface of the dust container 21, and at this time, the inlet 11 is an exhaust port 26 of the filter 25. )

The front of the load drive chamber 4 is formed with a through hole (6) for passing the air discharged from the dust container (21). A discharge port 13 for discharging air in the load driving chamber 4 is formed on the rear surface of the load driving chamber 4.

The dust container 21 is comprised by the container body 22 and the container cover 23 which covers the upper part of the container body 22. As shown in FIG. An air hole is formed in the plate surface of the container cover 23 to which the inlet 16 of the guide duct 17 is coupled. The filter 25 is disposed in the upper region of the dust container 21, and is coupled to the bracket 27 protruding downward from the plate surface of the container cover 23. The filter 25 has a plurality of intake holes formed in the circumferential surface.

On the other hand, the expansion pipe (7) has a corrugated pipe (9) that extends and contracts in the longitudinal direction and an extension pipe (8) for engaging with the corrugated pipe (9). The hand grip 10 is formed in the mutual coupling area | region of these corrugated pipe 9 and the extension pipe 8. As shown in FIG. The brush 15 is coupled to the end of the extension pipe 8 to contact the floorboard or carpet in the room. The bottom surface of the brush 15 is formed with an inlet (not shown) extending along the longitudinal direction thereof.

With this configuration, when power is applied, the rotor of the suction motor 3 rotates at high speed. At this time, the impeller fixed to the shaft of the suction motor 3 also rotates at the same speed, forcibly circulating the air in the load drive chamber 4. As a result, the inside of the load driving chamber 4 is in a high vacuum state, and a high pressure difference is generated from the outside thereof, so that air is sucked in through the inlet of the brush 15. At this time, when the brush 15 is brought into contact with the surface to be cleaned, for example, a carpet or a sheet, air containing dust is sucked in through the inlet of the brush 15.

The dust-containing air flowing through the inlet 11 rotates along the inner circumference of the dust container 21 to form a downward vortex air stream. At this time, the dust contained in the air is separated from the air by the centrifugal force and falls. On the other hand, the downward vortex airflow piggybacks on the airflow rising from the bottom surface, and flows into the guide duct 17 through the intake hole formed in the filter 25. Some of the dust falling to the bottom surface rises along the rising airflow, but this rising dust does not pass through the intake hole of the filter 25 and falls again.

On the other hand, the air passing through the filter 25 in the dust container 21 is clean air from which dust is removed. This air is guided along the flow path of the guide duct 17 and flows into the load driving chamber 4 through the passage hole 6. The air introduced into the load driving chamber 4 is discharged to the outside through the inlet 15 through the suction motor 13.

On the other hand, reference numeral 28 is a wheel for the movement of the cleaning body (3), 29 is a cord that can be withdrawn retracted wound in the lower region of the cleaning body (3).

By the way, in the conventional cyclone cleaner 1, a relatively expensive single filter 25 is installed in the dust container 21 to increase the manufacturing cost, and such a filter 25 may be used for dust having a relatively fine particle size. There is a problem that cannot be filtered. In addition, the dust collected in the dust container 21 blocks the intake hole of the filter 25 as time passes, thereby lowering the filtering efficiency. Therefore, dust to be periodically filtered should be removed. The troublesome work has to be done. On the other hand, because of the residue remaining in the intake hole of the filter 25, the relatively expensive filter 25 must be replaced frequently, thereby increasing the maintenance cost.

The conventional cyclone cleaner 1 also separates and stores the expansion pipe from the cleaning main body. At this time, the suction port protruding to the outside is likely to be worn or damaged, and foreign matters are introduced into the dust through the open suction port. do.

Accordingly, the object of the present invention, in view of such a problem in the prior art, relates to a vacuum cleaner to remove the dust bag (Dust Bag), to eliminate the hassle caused by the periodic replacement and at the same time reduce the maintenance cost .

Another object of the present invention is to provide a cyclone vacuum cleaner which is easy to clean the filter and does not need to be replaced relatively frequently.

Still another object of the present invention is to provide a vacuum cleaner which can reduce the risk of damage to the suction port and can open and close the suction port.

1 is a perspective view of a conventional cyclone vacuum cleaner,

FIG. 2 is a partially enlarged cross-sectional view of FIG. 1;

3 is a perspective view of a vacuum cleaner according to the present invention,

4 is a cross-sectional view of FIG.

5 is an enlarged partial view of FIG. 4;

6 is an exploded perspective view of FIG. 5;

7 is an enlarged cross-sectional view of an essential part of a vacuum cleaner according to another embodiment of the present invention; and

8 is an enlarged cross-sectional view of a main part of a vacuum cleaner according to another embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

7: stretch tube 15: brush

28: wheel 33: basic cleaning

34: suction port 35: partition member

36: air passage 37: intake blocking plate

38: knob 41: dust collecting chamber

43: opening and closing cover 47: support flange

48: dust collecting case accommodation groove 51: load driving room

53: suction motor 55: outlet

61: guide duct 65: rotating fan receiving portion

66: fan cover 67: top cover

68: flange 69: skirt

70: bearing

71: dust collecting unit 72: intake vent

73: dust container 74: filter

75 filter body 77 porous filter portion

81: rotating fan 83: rotating shaft

The object of the present invention is to provide a vacuum cleaner having a dust collecting chamber having a suction port and a load driving chamber having a means for sucking dust-containing air in the dust collecting chamber through the suction port. A dust container having an inlet and an outward opening communicating with the inlet; A guide duct for guiding the air discharged through the opening of the dust container to the load driving chamber; A filter rotatably received in the opening region in the dust container; And means for rotating the filter.

Here, the filter rotation means, the bearing is interposed between the outer peripheral surface of the filter and the support of the filter, the bearing for rotating the filter in the axial direction; A rotating fan disposed downstream of the filter to face the filter; And a rotating shaft for coaxially coupling the rotating fan and the filter.

Here, it is preferred that the dust container and the guide duct further comprises a rotating fan receiving portion for rotatably accommodating the rotating fan, wherein the rotating fan receiving portion blocks the opening of the dust container. An upper cover having a flange portion having a through hole in a central region, and a skirt portion projecting downward from an edge portion of the flange portion to accommodate the opening edge of the dust container; And a fan cover covering the through hole and having an air passing hole communicating with the guide duct. Then, the filter support portion may be formed in a through hole formed in the flange portion of the rotation fan accommodation portion.

On the other hand, the filter rotation means, the drive motor is fixed to the outside of the filter in the guide duct; Bevel gear fixed to the outer periphery of the filter adjacent to the drive motor; And a pinion coupled to the rotating shaft of the drive motor to engage the bevel gear.

And, it is preferable to further comprise a porous filter attached to the circumferential surface of the filter to block the intake hole of the filter.

In addition, it can be configured to further include an eccentric body coupled to the rotating shaft.

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

3 is a perspective view of a vacuum cleaner according to the present invention, Figure 4 is a cross-sectional view of FIG. The vacuum cleaner 31 is coupled to the distal end portion of the expansion and contraction tube 7, which is coupled to the cleaning base 33 having the suction port 34, the suction port 34 of the cleaning base 33, and the expansion tube 7. It consists of the brush 15. The interior of the cleaning main body 33 is divided by the partition member 35 to form a dust collecting chamber 41 and a load driving chamber 51. The partition member 35 is provided with an air passage hole 36 for communicating the dust collecting chamber 41 and the load driving chamber 51 with each other.

A suction port 34 is formed on the front surface of the dust collecting chamber 41, whereby the dust collecting chamber 41 is disposed upstream of the air flow with respect to the load driving chamber 51. A user grip portion 39 is formed in the lower region of the suction port 34. An opening is formed in the upper part of the dust collecting chamber 41, that is, the front region plate surface of the cleaning main body 33, and an opening / closing cover 43 capable of rotating and opening the dust collecting chamber 41 is provided in the front of the opening.

On the bottom of the opening / closing cover 43, a suction port blocking plate 37 for sliding opening and closing of the suction port 34 is provided. To this end, a guide rail (not shown) is formed at the bottom of the opening / closing cover 43 along the sliding direction of the inlet blocking plate 37. The suction port blocking plate 37 has a user manipulation knob 38 which protrudes upward from one plate surface in the plate surface direction. The knob 38 is exposed to the outside through a knob guide groove formed along the sliding direction of the suction port blocking plate 37 on the plate surface of the opening / closing cover 43.

On the other hand, in the dust collecting chamber 41, a dust separating portion 71 for separating and collecting dust from the dust-containing air sucked through the suction port 34 is housed. The dust separation unit 71 is retractable by opening the opening and closing cover that can be rotated and opened on the upper part of the dust collecting chamber. The dust separator 71 will be described later in detail with reference to FIGS. 5 and 6. In the upper region of the dust collecting chamber 41, a guide duct 61 for guiding the dust separated in the dust collecting chamber 41 to the load driving chamber 51 is provided. The air inlet 63 of the guide duct 61 communicates with the dust separator 71, and the air outlet 65 corresponds to the air through hole 36 formed in the partition member 35.

On the back of the load drive chamber 51, an outlet 55 for discharging air in the load drive chamber 51 to the outside is formed. In the lower region of the outlet 55, rolling wheels 28 are provided. In addition, the load driving chamber 51 has a suction motor 53 for sucking outside air through the suction port 34 of the dust collecting chamber 41.

On the other hand, the expansion pipe 7 has a corrugated pipe 9 which extends and contracts along the longitudinal direction and an extension pipe 8 which is engaged with the corrugated pipe 9 as described with reference to FIG. The hand grip 10 is formed in the mutual coupling area | region of these corrugated pipe 9 and the extension pipe 8. As shown in FIG. The brush 15 is coupled to the end of the extension pipe 8 to contact the floorboard or carpet in the room. The bottom surface of the brush 15 is formed with an inlet (not shown) extending along the longitudinal direction thereof.

In the drawing, reference numeral 29, which is not described, is a cord which can be withdrawn and withdrawn in the lower region of the cleaning body 33.

Meanwhile, FIG. 5 is a partially enlarged view of FIG. 4, which illustrates a dust separator in detail, and FIG. 6 is an exploded perspective view of FIG. 5. As can be seen in these figures, the dust separator 71 is a cylindrical dust container 73, a filter 74 rotatably housed in the dust container 73, and a rotation for rotating the filter 74. The fan 81 is comprised. The dust container 73 has an inlet 72 corresponding to the suction port 34 of the dust collecting chamber 41 and an upward opening 80. The inlet port 72 forms a predetermined inclination angle with respect to the body of the dust container 73, and is formed in a spiral shape. In the opening region of the dust container 73, a rotation fan accommodation portion 66 is formed between the guide duct 61 and the rotation fan 81 so as to be rotatable.

The dust container 73 is mounted on the support flange portion 47 extending from the lower region of the partition member 35. On the plate surface of the support flange portion 47, a dust container accommodation groove 48 for accommodating the dust container 73 is formed. Thereby, the flow of the dust container 73 seated on the support flange part 47 is oscillated. Guide duct 61 is coupled to the upper region of the dust container (73).

The rotating fan accommodating part 65 includes a top cover 67 for blocking the opening 80 of the dust container 73 and a fan coupled to the upper part of the upper cover 67 to form the rotating fan accommodation chamber 64. The cover 66 is comprised. The upper cover 67 has a plate-shaped flange portion 68 and a skirt portion 69 extending downward from the edge of the flange portion 68. A through hole is formed in the central region of the flange portion 68, and the skirt portion 69 receives the edge of the opening 80 of the dust container 73.

The through hole of the flange portion 68 forms a support for rotatably supporting the filter 74. The filter 75 includes a filter main body 75 having a cylindrical shape, and a filter unit 77 of breathable material attached to the circumferential surface of the filter main body 75. A plurality of intake holes 76 are formed in the outer circumferential surface of the filter main body 75, and openings corresponding to the through holes of the flange portion 68 are formed in the upper surface. The opening portion of the filter body 75 is formed with a coupling portion 79 protruding outward in the radial direction. The engaging portion 79 is supported by the through hole of the flange portion 68, whereby the filter 74 is arranged in the upper region in the dust container 73. In addition, the plurality of intake holes 76 formed on the outer circumferential surface of the filter main body 75 are blocked by the air filter material 77.

On the other hand, the fan cover 66, the through hole formed in the flange portion 68 of the upper cover 67, the air passing hole 60 is formed on one side in communication with the guide duct 61. In the present embodiment, the fan cover 66 and the guide duct 61 are integrally formed. The rotating fan 81 is accommodated in the rotating fan accommodation chamber 64 formed by the fan cover 66 so as to face the opening of the filter main body 75. Thereby, the rotary fan 81 is arrange | positioned downstream of the filter 74 on the flow path of the air which flows in through the suction port 34 and is formed in the cleaning main body 33. As shown in FIG.

The rotating shaft 83 is coaxially coupled between the rotating fan 81 and the filter 74. One end of the rotary shaft 83 is coupled to the shaft fixing groove 85 protruding from the bottom surface of the filter body 85, the other side is coupled to the shaft receiving groove 82 of the rotary fan 81. As a result, the rotary fan 81 and the filter main body 85 can be integrally rotated. Here, the bearing 70 is interposed between the upper outer periphery of the filter body 85 and the through hole formed in the flange portion 68 of the upper cover 67. This bearing 70 facilitates smooth rotation of the filter body 85.

With this configuration, in the vacuum cleaner 31, the suction motor 53 is driven when power is applied from the outside. Then, the air in the cleaning base body 33 is forcedly circulated, and at this time, the rotating fan 81 accommodated in the rotating fan accommodating part 65 is rotated by the flow of circulating air. Then, the filter 74 coupled coaxially with the rotary fan 81 also rotates integrally. On the other hand, the air in the cleaning body 33 is forcedly circulated, whereby the inside of the cleaning body 33 is in a high vacuum state. In this case, a high pressure difference occurs between the inside of the cleaning body 33 and the outside thereof, so that air is sucked in through the inlet of the brush 15. At this time, when the brush 15 is brought into contact with the surface to be cleaned, for example, a carpet or a sheet, air containing dust is sucked in through the inlet of the brush 15.

In this way, the dust-containing air to be sucked is passed through the expansion pipe (7), and then introduced into the interior through the inlet (72) of the dust container (73). At this time, air is introduced into the dust container 73 in an oblique direction by the downward inclination angle of the inlet port 72, and at the same time, the air falls downward along the inner circumference of the dust container 73 by the rotational force of the filter 74. To form a vortex air stream. At this time, dust having a relatively large particle size is separated from the vortex air stream by centrifugal force. The separated dust falls to the lower area of the dust container and is collected.

On the other hand, the falling downward vortex airflow starts an inverted upward motion at the bottom surface of the dust container 73 to form an upward airflow having a relatively small rotation radius. Thus, after passing through the intake hole 76 formed in the circumferential surface of the filter 74, it is introduced into the guide duct 61 via the rotation fan accommodating portion 65. Due to the flow of air, the rotary fan 81 accommodated in the rotary fan accommodating portion 65 can rotate continuously, and the filter 74 rotates integrally therewith, so that the vortex air flow in the dust container 73 is more effective. Is formed.

On the other hand, piggybacking on the upward airflow, the dust having a relatively large particle collected on the bottom surface of the dust container 73 also rises. However, most of the dust does not pass through the filter portion 77 of the breathable material is adsorbed on the surface. At this time, the air introduced into the guide duct 61 is guided along the flow path and flows into the load driving chamber 51 through the air passage hole 36 of the partition member 35. At this time, the air flowing through the air passage hole 36 into the load driving chamber 51 is clean air from which dust is removed, and this air passes through the suction motor 53 and has an outlet port formed in the cleaning main body 33. Through 55).

On the other hand, in order to discard the dust collected in the dust container 73, first, the opening / closing cover 43 of the cleaning base body 33 is opened. Then, after simply pulling out the dust container 73 housed in the dust collecting chamber 41, the upper cover 67 is opened, and the dust collected by the dust container 73 can be discarded.

In the above-described and illustrated embodiments, the rotating fan accommodating portion 65 in which the upper cover 67 and the fan cover 66 are separately formed has been described, but these can be simply injection molded integrally. As described above, the rotation fan accommodating portion 65 in which the upper cover 67 and the fan cover 66 are integrally formed may be configured to be detachably coupled to the lower portion of the opening / closing cover 43. have. In this case, when the opening / closing cover 43 is opened, the rotary fan accommodating portion 65 coupled to the upper portion of the dust container 73 is pulled out integrally, whereby the opening 80 of the dust container 73 is integrated. To be opened. The user can draw out the dust container 73, and can easily discard the dust collected therein.

On the other hand, Figure 7 is an enlarged cross-sectional view of the main part of the vacuum cleaner according to another embodiment of the present invention. The vacuum cleaner 91 shown in the drawing has a configuration substantially the same as that of the above-described and illustrated embodiments, and is merely eccentric to the rotation shaft 83 that connects the rotation fan 81 and the filter 74 to the integral rotation. Sieve 93 is coupled. The eccentric body 93 has a rotation center which is predetermined eccentric with respect to the rotation center of the rotation shaft 83, thereby causing vibration at the time of rotation of the rotation shaft 83.

In the vacuum cleaner 91 according to the present embodiment having such a configuration, when the rotary fan 81 and the filter 74 are integrally rotated in the dust container 73, the vibration of the rotary shaft 83 is filtered. Is delivered). Thus, dust adsorbed onto the surface without passing through the porous filter portion 77 of the filter 74 is separated from the surface of the porous filter portion 77 by the flow of the filter 74, and the bottom of the dust container 73 is removed. Falls into cotton. Thereby, the cleaning of the filter 74 is easy and it can be used without exchange for a comparatively long time.

Incidentally, in the present embodiment, the rotation shaft 83 and the eccentric body 93 have been described separately, but it is a matter of course that the rotation shaft 83 can be configured as the eccentric shaft.

On the other hand, in the above-described and illustrated embodiments, the speed of air flowing into the guide duct from the dust container after being sucked through the suction port depends on the performance of the suction motor. Therefore, when the performance of the suction motor is lowered, the rotational force of the rotating fan may be lowered, and at this time, the rotational force of the filter in the dust container is also reduced. In this case, since no effective vortex airflow is formed in the dust container, the degree of separation of dust by the centrifugal force is weak.

Therefore, in view of such a problem, FIG. 8 is an enlarged sectional view of a main part of a vacuum cleaner according to another embodiment of the present invention. The vacuum cleaner 101 of this embodiment has a configuration substantially the same as that of the vacuum cleaners described above, and merely includes a configuration for rotating the filter 74, that is, a rotating fan 81, a bearing 70, and a rotating shaft 83. ) Is excluded. And the bevel which transmits the rotational force of the drive motor 103 and the drive motor 103 to the filter 74 by the structure which rotates the filter 74 instead of these rotating fans 81 and the rotating shaft 83. FIG. It has a gear 107.

The filter 74, as can be seen in the figure, does not have a coupling portion 79 protruding radially from the edge of the opening. Instead, it has an extension 109 protruding upward from the opening edge of the filter 74 as compared to conventional embodiments. Bevel gears 107 are coupled to the outer periphery of the extension 109. In addition, a gasket 111 is attached to block a gap between the outer periphery of the filter 74 and the flange portion 68 of the upper cover 67.

On the other hand, the drive motor 103 is fixed to one side in the rotation fan accommodating portion 65. Here, the drive motor 103 is preferably fixed to the outside to maintain a predetermined distance from the air passage hole 36 for discharging the air in the rotation fan accommodation portion (65). The pinion 105 engaged with the bevel gear 107 is coupled to the rotation shaft of the drive motor 103.

The vacuum cleaner 101 having such a configuration maintains the filter 74 constant by the rotational force of the drive motor 103 even if the flow rate of air flowing into the guide duct 61 in the dust container 73 is lowered. Can rotate at speed. Therefore, by the filter 74 rotating at a constant speed, it is possible to form a vortex air stream having a constant rotational force in the dust container 73 at all times. As a result, the dust contained in the air can be effectively separated.

On the other hand, in the vacuum cleaner 101 of such a configuration, it may have a configuration that can change the rotational force of the drive motor 103. In this case, the rotational speed of the vortex airflow can be increased or decreased in the dust container 73, so that dust can be separated and collected more effectively.

As described above, according to the present invention, the dust can be separated and collected by centrifugal force, so that the dust bag can be removed, thereby eliminating the trouble caused by the periodic replacement of the dust bag. Cyclone vacuum cleaners are provided to reduce maintenance costs.

In this vacuum cleaner, the filter is easy to clean and does not need to be replaced relatively often. In addition, the risk of damage to the suction port is reduced, and the suction port can be opened and closed.

Claims (8)

A vacuum cleaner having a dust collecting chamber having a suction port and a load driving chamber having a means for sucking dust-containing air in the dust collecting chamber through the suction opening, A dust container housed in the dust collecting chamber and having an intake port communicating with the suction port and an outward opening; A guide duct for guiding the air discharged through the opening of the dust container to the load driving chamber; A filter rotatably disposed in said opening region in said dust container; And And means for rotating the filter. The method of claim 1, The filter rotation means, A bearing interposed between an outer circumferential surface of the filter and a support of the filter to rotate the filter in an axial direction; A rotating fan disposed downstream of the filter to face the filter; And And a rotating shaft for coaxially coupling the rotating fan and the filter. The method of claim 2, And a rotating fan accommodating part formed between the dust container and the guide duct to rotatably receive the rotating fan. The method of claim 3, wherein The rotating fan accommodating part, An upper cover which blocks an opening of the dust container and has a flange portion having a through hole in a central region, and a skirt portion projecting downward from an edge of the flange portion to accommodate the opening edge of the dust container; And And a fan cover covering the through hole and having an air through hole communicating with the guide duct. The method of claim 2, And the filter support part is a through hole formed in the flange part of the rotation fan accommodating part. The method of claim 1, The filter rotation means, A drive motor fixed to the outside of the filter in the guide duct; Bevel gear fixed to the outer periphery of the filter adjacent to the drive motor; And And a pinion coupled to the rotating shaft of the drive motor and engaged with the bevel gear. The method according to claim 2 or 6, And a porous filter unit attached to the circumferential surface of the filter to block the intake hole of the filter. The method of claim 7, wherein And a eccentric body coupled to the rotating shaft.