US20060130267A1 - Electric cleaner - Google Patents
Electric cleaner Download PDFInfo
- Publication number
- US20060130267A1 US20060130267A1 US10/535,781 US53578105A US2006130267A1 US 20060130267 A1 US20060130267 A1 US 20060130267A1 US 53578105 A US53578105 A US 53578105A US 2006130267 A1 US2006130267 A1 US 2006130267A1
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- United States
- Prior art keywords
- suction inlet
- passage
- suction
- respectively connected
- inward
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/02—Nozzles
- A47L9/04—Nozzles with driven brushes or agitators
- A47L9/0405—Driving means for the brushes or agitators
- A47L9/0411—Driving means for the brushes or agitators driven by electric motor
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L5/00—Structural features of suction cleaners
- A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
- A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
- A47L5/28—Suction cleaners with handles and nozzles fixed on the casings, e.g. wheeled suction cleaners with steering handle
- A47L5/30—Suction cleaners with handles and nozzles fixed on the casings, e.g. wheeled suction cleaners with steering handle with driven dust-loosening tools, e.g. rotating brushes
Definitions
- the present invention relates to the structure of a suction inlet of an electric vacuum cleaner.
- the structure as described in the above-mentioned Japanese Patent Application Published NO. H8-164095 has a single suction inlet, and thus brings about a problem that suction characteristics cannot set individually in accordance with a plurality of floors, such as a carpet, wooden floor, and tatami.
- an object of the present invention to provide an electric vacuum cleaner having a suction inlet body provided with a plurality of suction inlets that can be selectively used depending on different cleaning operations on a plurality of floor surfaces.
- a suction inlet body is provided with a plurality of suction inlets, and, of suction inlet passages respectively connecting with the plurality of suction inlets, at least one is provided with adjusting means for adjusting air passage volume in a predetermined portion of the corresponding suction inlet.
- a suction inlet switch device is provided which switches among the plurality of suction inlets for use.
- Providing a plurality of suction inlets in this way permits setting suction characteristics in one suction inlet body in accordance with different usages.
- Providing the aforementioned passage with the means for adjusting the air passage volume in the predetermined portion of the suction inlet permits providing uniform wind speed at different portions of the suction inlet connecting with this passage, thus permitting steady suction, which results in improved suction performance.
- the air volume is adapted to increase at both side portions, even when the suction inlet cannot be provided in both the right and left ends of the suction inlet body, dust can be suctioned even in the regions at both the right and left sides of the suction inlet body, thus resulting in improved suction performance of the suction inlet body.
- the separate suction inlet passage running along the front and the top of the suction inlet passage is provided with adjusting means for adjusting the air passage volume in a predetermined portion of the separate suction inlet, thus permitting the air passage volume to be adjusted gradually with no difficulties even in a region having a long passage. This permits the adjustment of the air passage volume with little loss, thus achieving further improvement in the suction performance.
- the adjusting means is so formed as to give the suction inlet passage provided therewith a different thickness-direction spatial dimension in a predetermined portion thereof. This permits the adjustment of the air passage volume in the suction inlet passage and the separate suction inlet passage where a relatively long air passage process can be set. In addition, since the air passage volume can be changed by changing the passage in the thickness direction, the air passages communicates with each other, thus forming one space without any obstacles. This permits the adjustment of the air passage volume with little loss, thus achieving even further improvement in the suction performance.
- Portions of the suction inlet passage leading from the both side portions of the suction inlet inward has a thickness-direction spatial dimension greater than another portion of the suction inlet passage. This increases the air passage volume at the both sides of the suction inlet body, which permits adapting the width of the suction inlet to be smaller than the width of the suction inlet body while providing the remaining width portions of the suction inlet body as reinforcement portions, thus achieving the suction inlet body having great impact strength.
- a partition wall between the separate suction inlet passage provided with the adjusting means and the suction inlet passage adjacent thereto has, on the side thereof facing the adjacent suction inlet passage, a partition wall surface that is rectilinear in the right/left direction.
- This permits setting the air passage condition of the suction inlet passage regardless of the change in the separate suction inlet passage, which permits freely setting the suction inlet and the separate suction inlet, thus easily achieving the suction inlet body provided with suction inlets well suited to their respective usages.
- the exterior on the separate suction inlet passage side of the suction inlet body can be formed by a smooth surface that has no convex and concave portions, thus achieving the suction inlet body with good appearance.
- the thickness-direction dimension of the suction inlet passage as measured at the inward side is greater than or equal to a thickness-direction dimension of the suction inlet passage as measured at the suction inlet side. This permits achieving the suction inlet body with the aforementioned suction inlet passages that encounter little waste clogging.
- FIG. 1 is a perspective view of the electric vacuum cleaner according to a first embodiment of the present invention.
- FIG. 2 is a vertical cross section of the electric vacuum cleaner.
- FIG. 3 is a partially horizontal cross section of the main body of the electric vacuum cleaner.
- FIG. 4 is a side view of the electric vacuum cleaner, with its suction inlet body cross-sectioned.
- FIG. 5 is a partially enlarged cross section of the suction inlet body in a different condition from the condition shown in FIG. 4 .
- FIG. 6 is a perspective view of the suction inlet switch device.
- FIG. 7 is an exploded perspective view of the suction inlet switch device.
- FIG. 8 is a perspective view of the inner structure of the suction inlet body.
- FIG. 9 is a partial perspective view of the inner structure of the same suction inlet body as viewed from a different direction from the direction from which FIG. 8 is viewed.
- FIG. 10 is a cross section of a suction inlet body, broken away at its front center, as viewed from the side.
- FIG. 11 is a diagram of the suction inlet body as viewed from above.
- FIG. 12 is a side view of the usage state of the electric vacuum cleaner with its suction inlet body cross-sectioned.
- an electric vacuum cleaner 1 The structure of an electric vacuum cleaner 1 according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 12 .
- the electric vacuum cleaner 1 is placed in the front, and the user operates the electric vacuum cleaner 1 while standing behind it. It is thus defined that the side where the user stands is the rear side of the electric vacuum cleaner 1 and the side opposite thereto is the forward side (front side) of the electric vacuum cleaner 1 .
- the left side of the observer is the left side of the electric vacuum cleaner 1 and the side opposite thereto is the right side of the electric vacuum cleaner 1 .
- the electric vacuum cleaner 1 is an upright type and is divided into two major parts. One of the parts corresponds to a vacuum cleaner body 10 , and the other part corresponds to a suction inlet body 70 .
- a shell forming the suction inlet body 70 (e.g. shell formed of synthetic resin) has structure as described below.
- the suction inlet body 70 has a flat box-shaped central shell 71 on the center thereof and side shells 72 and 73 on the right and left sides thereof, respectively.
- the rear portions of the side shells 72 and 73 project more backward than the central shell 71 , forming rear projections 74 and 75 , respectively.
- the suction inlet body 70 has a C-shaped, planar form as a whole, and receives the vacuum cleaner body 10 between the rear projections 74 and 75 .
- the vacuum cleaner body 10 is formed of two shell portions. One of the shell portions is a cylindrical blower shell 11 , and the other shell portion is a dust collector holder 12 that projects from the blower shell 11 .
- the blower shell 11 has an electric blower 13 arranged therein (see FIG. 2 ). The axis of the electric blower 13 and the axis of the blower shell 11 are substantially parallel to each other and are both substantially horizontal.
- the blower shell 11 is arranged between the rear projections 74 and 75 of the suction inlet body 70 with the axis thereof substantially horizontal, so that the spindle arranged on the axis thereof is fitted with the rear projections 74 and 75 .
- a spindle 14 projecting from the end surface of the blower shell 11 is rotatably supported by a bearing 76 provided in the rear projection 74 .
- a drive shaft 15 i.e., the extension of the motor shaft of the electric blower 13 , enters into the rear projection 75 .
- a cylindrical spindle (omitted from the figure) that wraps the drive shat 15 is projected from an end surface of the blower shell 11 so as to be rotatably supported by a bearing 77 provided in the rear projection 75 .
- the blower shell 11 is coupled with the suction inlet body 70 by these spindles on the right and left sides so as to be rotatable around the horizontal axis.
- the dust collector holder 12 is hollow-shaped, and formed long and slender as a whole, i.e., lies longitudinally.
- the longitudinal direction of the dust collector holder 12 is substantially perpendicular to the axis of the blower shell 11 .
- the dust collector holder 12 projects not from the center of the blower shell 11 but one-sidedly from either the left or right thereof. In the first embodiment, the dust collector holder 12 projects from the left of the blower shell 11 .
- a base 16 and an overhang 17 for supporting the bottom and the top, respectively, of a dust collector to be described later.
- the base 16 is so provided as to stand upward from the blower shell 11 .
- the overhang 17 is formed on the side surface of the dust collector holder 12 .
- Both the base 16 and the overhang 17 are located in the space above the blower shell 11 , i.e., right of the dust collector holder 12 .
- a rear support wall 18 which supports the left half of the dust collector to be described later from behind (see FIG. 3 ).
- the rear support wall 18 is formed on the side surface of the dust collector holder 12 .
- Numeral 20 represents a dust collector.
- the dust collector 20 swirls airflow at high speed so as to collect dust in a cyclone method.
- the inside of the dust cup 21 is divided by a horizontal wall 22 into two sections: upper and lower chambers.
- the upper section is a centrifuge chamber 23
- the lower section is an exhaust chamber 24 .
- an air inlet 25 which is arranged at such location and angle as to generate airflow swirling along the inner peripheral wall of the centrifuge chamber 23 .
- an exhaust pipe 26 which is a cylindrical basket-like member having an open upper portion and a closed lower portion.
- the exhaust pipe 26 has the upper open portion bonded to a vent 27 , which is formed on the center of the horizontal wall 22 , so as to be supported by the horizontal wall 22 in a drooping manner.
- a filter 28 of fine meshes woven with synthetic fiber, such as nylon, is attached to the outer peripheral surface of the exhaust pipe 26 .
- a stabilizer 29 which has four fins radially combined together so as to have a cruciate horizontal cross-section, with the end thereof reaching the vicinity of the bottom of the dust cup 21 .
- the stabilizer 29 promotes the separation of dust from airflow and also reduces the movement of dust accumulated on the bottom of the dust cup 21 .
- the dust collector 20 is provided with an access opening by an appropriate technique for the purpose of discarding dust in the dust cup 21 and cleaning the filter 28 .
- the access opening may be achieved by providing structure such that an opening is provided in the top of the dust cup 21 and then covered with a lid so that, when the lid is opened, the exhaust pipe 26 and the stabilizer 29 can be pulled out together with the horizontal wall 22 .
- the access opening may be achieved by providing the dust collector 20 with the dust cup having upper-and-lower-section structure including the exhaust chamber 24 and the centrifuge chamber 23 that are removable from the body of the dust collector.
- An air outlet 30 is formed in the exhaust chamber 24 . As shown in FIG. 3 , both the air inlet 25 and the air outlet 30 are provided in the side surface of the dust collector 20 which faces the dust collector holder 12 . The air inlet 25 and the air outlet 30 are oriented in the same direction, i.e., substantially leftward.
- a first air passage 31 is provided for the air inlet 25 of the dust collector 20 .
- a second air passage 32 is provided for the air outlet 30 .
- the first air passage 31 communicates with a suction inlet (to be described in detail later) of the suction inlet body 70 , and directs airflow suctioned through the suction inlet to the air inlet 25 .
- the second air passage 32 communicates with a suction inlet of the electric blower 13 , and directs airflow discharged through the air outlet 30 to the electric blower 13 .
- the first air passage 31 is mainly formed of a flexible hose 33 .
- One end of the flexible hose 33 is fixed to one end of a connecting pipe 34 (see FIG. 3 ) provided horizontally in the dust collector holder 12 .
- the other end of the connecting pipe 34 serves as an outlet 35 of the first air passage 31 , to which an air inlet 25 of the dust collector 20 is connected.
- a seal ring 36 is fitted to the outlet 35 in order to maintain air tightness when connected with the air inlet 25 .
- the other end of the flexible hose 33 is removably fitted with a connecting pipe 78 that projects from the top surface of the side shell 72 of the suction inlet body 70 .
- the connecting pipe 78 communicates with the suction inlet.
- the first air passage 31 may be mainly formed of a tubular body instead of a flexible hose.
- the flexible hose may be replaced with a plurality of hard pipes elastically connected together.
- the tubular body may be of any type which can absorb the difference in the distance from the connecting pipe 34 to the connecting pipe 78 between when the vacuum cleaner body 10 is upright and when it is tilted, and also which does not become crushed when the inner pressure declines below the atmosphere pressure.
- the second air passage 32 is formed of the hollow portion itself of the dust collector holder 12 .
- the upper area of the hollow portion is partitioned off by a wall 12 a (see FIG. 2 ), so that the second air passage 32 does not communicate with the overhang 17 .
- an inlet 37 of the second air passage 32 is formed at a position corresponding to the air inlet 30 of the dust collector 20 .
- a seal ring 38 is fitted to the inlet 37 in order to maintain air tightness when connected with the outlet 30 .
- the bottom end of the second air passage 32 reaches the bottom of the blower shell 11 .
- An outlet 39 is provided in the side wall of the bottom end of the second air passage 32 , to which a suction inlet 13 a of the electric blower 13 is directly connected through a vibration-proof cushion 40 that also serves for maintain air tightness.
- the dust collector 20 is fitted to the dust collector holder 12 by being pressed against the dust collector holder 12 in a manner such that the longitudinal direction of the dust collector 20 agrees with the longitudinal direction of the dust collector holder 12 . More specifically, the dust collector 20 is fitted by being inserted in the space surrounded by the base 16 , the overhang 17 , and the rear support wall 18 .
- a slide latch 43 which is constantly pressed upward by a spring, not shown, and comes into engagement with the edge of the overhang 17 at the final stage of the insertion of the dust collector 20 . In this state, the dust collector 20 cannot be removed from the dust collector holder 12 unless the latch 43 is % pressed down against the spring, not shown, so as to be separated from the overhang 17 .
- the inside of the base 16 communicates with an exhaust space 50 into which the electric blower 13 exhausts air.
- a filter 51 is inserted in the base 16 .
- a filter such as HEPA (high-efficiency particulate air) filter, for example, may be used which offers higher filtering performance than the filter 28 does.
- the airflow after the dust is trapped by the filter 51 returns into the chamber through an exhaust outlet 54 formed in the front surface of the base 16 .
- the exhaust outlet 54 is formed of a plurality of horizontal slits aligned vertically.
- a controller 60 (see FIG. 2 ) which is connected to the electric blower 13 through a lead wire.
- the controller 60 controls the entire operation of the electric vacuum cleaner 1 .
- the upper front portion of the overhang 17 serves as an operation panel 61 where various switch buttons are arranged.
- the operation panel 61 is easily operated since it is provided in the overhang 17 .
- a handle 62 separately molded is fixed with the tip of the dust collector holder 12 .
- a bracket 63 From the lower rear portion of the blower shell 11 , there projects obliquely downward a bracket 63 , to which wheels 64 (see FIG. 4 ) are fitted.
- wheels 64 There is provided one wheel 64 on each of the right and left ends of the blower shell 11 .
- supporting legs 65 In front of the wheels 64 , there are provided supporting legs 65 , one on each of the right and left.
- the suction inlet body 70 is formed by providing on the left and right sides of the flat box-shaped central shell 71 the side shells 72 and 73 , respectively, whose rear portions form the rear projections 74 and 75 , respectively.
- the central shell 71 and side shells 72 and 73 are integrally molded together by, for example, synthetic resin.
- the bottoms of the central shell 71 and the side shells 72 and 73 are open, and the openings are closed by a bottom plate 80 .
- the bottom plate 80 has a plurality of suction inlets formed at the front portion thereof.
- the bottom plate 80 has a rear portion with a surface so inclined as to become higher increasingly rearward.
- the first suction inlet 81 is elongated in the right-and-left direction, and has a width substantially equal to the width of the suction inlet body 70 excluding a belt-driving portion to be described later.
- the second suction inlet 82 is formed, located in the front side of and also in parallel to the first suction inlet 81 .
- the second suction inlet 82 has the area of opening much smaller than that of the first suction inlet 81 .
- suction passages individually for the first and second suction inlets 81 and 82 .
- the suction passage 83 for the first suction inlet 81 is formed in the bottom face of the central shell 71 (see FIG. 4 ).
- the suction passage 83 has a funnel-like form and has an air outlet 84 that is biased leftward, as viewed from the front.
- the suction passage 85 for the second suction inlet 82 is arranged in such a manner as to overlap the suction passage 83 .
- the suction passage 85 is formed between the top of the central shell 71 and a cover 86 removably fitted thereto with a space in between.
- the cover 86 has a front end thereof hooked over the central shell 71 and the rear end coupled with the central shell 71 by a screw or a latch 86 a so as to be kept fitted.
- the cover 86 is formed of transparent or semi-transparent material and permits viewing the inside of the suction passage 85 from outside.
- An air outlet 87 of the suction passage 85 is provided around the rear center of the suction passage 85 .
- a suction inlet switch device 90 which has in front of a valve casing 91 thereof air inlets 92 and 93 arranged vertically in series.
- the lower air inlet 92 is connected to the air outlet 84 of the suction passage 83 .
- the upper air inlet 93 is connected to the air outlet 87 of the suction passage 85 via a hose, not shown.
- this air outlet In the top surface of the valve casing 91 , there is provided an air outlet that is common to the air inlets 92 and 93 .
- this air outlet itself is a connecting pipe 78 that is a start point of the first air passage 31 .
- valve casing 91 There is arranged in the valve casing 91 a switch valve 95 which rotates within the vertical plane.
- the switch valve 95 is fitted to a valve axis 96 and rotates with the rotation of the valve axis 96 . This rotation causes the switch valve 95 to selectively close one of the air inlets 92 and 93 while opening the other one.
- the structure of the suction inlet switch device 90 will be described later in detail.
- a seal member (not shown) formed of soft rubber or the like so as to provide better air tightness when the air inlets 92 and 93 are closed.
- the first ground support portion 101 is formed of wheels so provided as to be located near the second suction inlet 82 , i.e., at the both ends of the second suction inlet 82 in this case.
- the second ground support portion 102 is formed of a pair of right and left projections formed on the bottom plate 80 .
- the second ground support portion 102 is provided behind the first suction inlet 81 , around where the rear portion of the bottom plate 80 starts to incline.
- the second ground support portion 102 supports the suction inlet body 70 , and the first ground support portion 101 is lifted off the floor.
- a guide 103 which is located in front of the suction inlet 82 and has a width substantially equal to the total width of the suction inlet body 70 .
- the bottom surface of the guide 103 becomes an inclined surface 104 (see FIG. 5 ) that increasingly lowers toward the second suction inlet 82 .
- the front end of the inclined surface 104 is located about 3 mm higher than the entrance of the second suction inlet 82 .
- an agitator 110 In the first suction inlet 81 , there is provided an agitator 110 .
- the agitator 110 it is a common practice to use one formed by planting a plurality of rows of bristles in the circumference of a cylindrical rotating body at a predetermined angle.
- An agitator 110 may be used which is provided with a flake formed of rubber or soft synthetic resin instead of the rows of bristles.
- the axial direction of the agitator 110 is equal to the lateral width direction of the first suction inlet 81 .
- the agitator 110 has part of the outer periphery thereof rotatably supported inside the suction inlet body 70 so as to project outward through the first suction inlet 81 .
- the source of rotational power of the agitator 110 is a drive shat 15 of the electric blower 13 , from which the power is transmitted to the agitator 110 via the following power transmitting mechanism.
- the drive shaft 15 is fixed with a power pulley 111 .
- a belt 113 is wound around the power pulley 111 and a drive pulley (to be described later) that is so fixed with the shaft of the agitator 110 as to rotate integrally with the agitator 110 .
- the power pulley 111 and the belt 113 are located inside the side shell 73 .
- the belt 113 may be directly wound around the drive shaft 15 without fixing the separately provided power pulley 111 with the drive shaft 15 .
- an idler that is rotatable independently from the agitator so as to permit stopping the rotation of the agitator 110 during the operation of the electric blower 13 .
- the idler When the belt is placed over the idler, the idler only makes idle running, so that no power is transmitted to the agitator 110 .
- a belt replacement device 120 Inside the side shell 73 , there is provided a belt replacement device 120 for performing replacement of the belt 113 . The structure of the belt replacement device 120 will be described later in detail.
- the valve casing 91 of the suction inlet switch device 90 has an opening in the left side surface thereof. This opening is closed by a cover 131 which is fixed with the valve casing 91 by screws. In order to maintain good air tightness, a seal member 91 a is attached to the edge of the opening of the valve casing 91 .
- valve shaft 96 On the valve shaft 96 , there are integrally formed a switch valve 95 and a lever 132 .
- the valve shaft 96 , the switch valve 95 , and the lever 132 may be integrally formed by injection molding or the like by use of synthetic resin or metal. Alternatively, they may be separately formed, and then assembled and fixed together.
- the valve shaft 96 has on the right end thereof a reduced diameter portion 96 a that projects to the right side surface of the valve casing 91 through a shaft hole (not shown) provided in the valve casing 91 .
- the left portion of the reduced diameter portion 96 a is rotatably supported in such a manner as to be sandwiched between a concave portion 91 b that is formed in the inner surface of the valve casing 91 and has a semicircle cross section and a semicircle notch 131 a that is formed in the cover 131 . That is, one bearing portion is formed by combining the concave portion 91 b and the notch 131 a together.
- the concave portion 91 b is located between the air inlets 92 and 93 , and in the upstream side of airflow in the valve casing 91 . Such arrangement of the concave portion 91 b in the upstream side of airflow is made for the purpose of preventing the operation of the switch valve 95 from being affected by dust caught around the valve shaft 96 .
- a lever 132 which is one component of an interlock means for interlocking the suction inlet switch device 90 with the belt replacement device 120 . Because, in addition to the switch valve 95 , the lever 132 is integrally formed, material provided with a predetermined level of strength, such as engineering-plastic-grade synthetic resin or metal, is used for the valve shaft 96 .
- the lever 132 has long and short arms 132 a and 132 b that project in mutually opposite directions.
- a slit 132 c In the end of the long arm 132 a , there is provided a slit 132 c whose longitudinal direction agrees with the longitudinal direction of the log arm 132 a .
- a toggle spring 133 is arranged between the short arm 132 b and the cover 131 .
- the toggle spring 133 is formed of a torsion coil spring, with one end thereof engaged with the end of the short arm 132 b and with the other end thereof engaged with a hollow boss 131 b formed on the outer surface of the cover 131 .
- the angular position of the valve shaft 96 where the short arm 132 b and the hollow boss 131 b approach closest to each other is a change point as a border that provides the switch valve 95 with power for closing the air inlet 92 or power for closing the air inlet 93 .
- a pedal 134 for making switch operation with the switch valve 95 (see FIG. 1 ).
- the pedal 134 is arranged on a concave portion 74 a formed on the left upper corner of the rear projection 74 of the suction inlet body 70 .
- the pedal 134 has front and rear portions forming together a certain angle relative to the center lying at the area where the valve shaft 96 is fitted, and thus looks bent when viewed from the side. Stepping on either the front or rear portion of the pedal 134 , whichever is lifted, causes the pedal 134 to make seesaw-like movement, thereby rotating the valve shaft 96 .
- the belt replacement device 120 is assembled mainly by a long, slender frame 141 .
- the frame 141 is fixed inside the side shell 73 so that the longitudinal direction of the frame 141 is directed in the front-and-back direction of the suction inlet body 70 .
- the belt 113 passes through the lower portion of the frame 141 , and is replaced between the drive pulley 112 and the idler 114 .
- the drive pulley 112 is fixed with the shaft 110 a of the agitator 110 so as to rotate integrally with agitator 110 .
- the idler 114 is located on the right side of the drive pulley 112 , and is rotatable independently from the agitator 110 .
- the frame 141 supports a spindle 142 that extends in the front-and-back direction.
- the axis line of the spindle 142 is parallel to the extension direction of the belt 113 .
- the spindle 142 rotatably supports a fork 150 for moving the belt 113 .
- the fork 150 is formed by a main body 151 made of metal and a rotatably supporting portion 152 made of synthetic resin that are so combined together as to be mutually non-rotatable.
- the main body 151 and the rotatably supporting portion 152 of the fork 150 are fixed together by insert molding, screwing, swaging, or the like.
- the rotatably supporting portion 152 is made of synthetic resin, little noise is generated when it rotates with respect to the spindle 142 .
- the main body 151 of the fork 150 extends in front of the rotatably supporting portion 152 such that the longitudinal direction of the main body 151 is parallel to the extension directions of the spindle 142 and the belt 113 .
- the main body 151 holds the belt 113 between a pair of parallel walls 151 a formed on the end thereof.
- the parallel walls 151 a extend in parallel to the main body 151 while being kept parallel to each other.
- the parallel walls 111 a are spaced at a predetermined distance from the rotatably supporting portion 152 .
- an operation portion 152 a that projects in the form of knob.
- the operation portion 152 a projects outward through a window 75 a formed in the rear projection 75 of the suction inlet body 70 .
- the area where the operation portion 152 a hits the vicinity of one end of the window 75 a is one rotation limit of the rotatably supporting portion 152 .
- the area where the operation portion 152 a hits the vicinity of the other end of the window 75 a is the other rotation limit of the rotatably supporting portion 152 .
- the operation portion 152 a and the window 75 a form a stopper means 153 that defines the rotation limits of the fork 150 .
- the operation portion 152 a may hit the side shell 73 or the frame 141 .
- toggle spring which is formed of a torsion coil spring, as is the case with the toggle spring 133 .
- One end of the toggle spring engages with the rotatably supporting portion 152 , and the other end thereof engages with the frame 141 , thereby permitting smooth angle change of the rotatably supporting portion 152 .
- a lever 154 projects radially.
- a lever 155 so supported as to be rotatable by a spindle 156 within the vertical plane.
- a slit 155 a provided in one arm of the lever 155 engages with the lever 154 .
- the other arm of the lever 155 also has a slit 155 b .
- the longitudinal directions of the slits 155 a and 155 b agree with the direction in which the lever 155 itself extends.
- the suction inlet switch device 90 and the belt replacement device 120 are coupled together by an interlocking means 160 .
- the main part of the interlocking means 160 is a crank 161 formed by bending a steel rod or steel pipe into a substantially C shape.
- the crank 161 is rotatably supported inside the suction inlet body 70 so as to be rotatable about the horizontal axis by a pair of right and left bearings 162 .
- the crank 161 has one end 161 a thereof engaged with the slit 132 c of the lever 132 on the suction inlet switch device 90 side.
- the crank 161 has the other end 161 b thereof engaged with the slit 155 b of the lever 155 on the belt replacement device 120 side.
- the lever 155 as well as the lever 132 , is one component of the interlocking means 160 .
- the dust collector holder 12 When the electrical vacuum cleaner 1 is not in operation, i.e. is in storage, as shown in FIG. 4 , the dust collector holder 12 is in an upright state, and the vacuum cleaner body 10 is four-point-supported on the floor by two each of the wheels 64 and the supporting legs 65 .
- the second ground support portion 102 supports the suction inlet body 70 , and the first ground support portion 101 is lifted off the floor.
- the agitator 110 is also not in contact with the floor.
- a code is extended and then connected to an outlet.
- the handle 62 serves as a power point of the lever
- the wheel 64 serves as the fulcrum of the lever
- the spindle 14 and the drive shaft 15 i.e., the cylindrical spindle surrounding the drive shaft 15
- the spindle 14 and the drive shaft 15 lift up the rear portion of the suction inlet body 70
- the supporting legs 65 separates from the floor.
- the second ground support portion 102 separates from the floor, and the front portion of the bottom plate 80 having the first and second suction inlets 81 and 82 becomes substantially parallel to the floor. Consequently, the first ground support portion 101 and the agitator 110 make contact with the floor (see FIG. 5 ).
- the height of between 60 and 80 cm corresponds to the height of the handle 62 that permits an adult of average physical size to push and pull the electric vacuum cleaner 1 for cleaning.
- the degree of projection of the first ground support portion 101 is adjusted so that the height (H 1 in FIG. 5 ) from the floor to the entrance of the second suction inlet 82 becomes 0.8 to 2 mm.
- the second suction inlet 82 approaches the floor up to this distance (0.8 to 2 mm), where the first ground support portion 101 hits the floor, and thus does not approach the floor any further.
- a predetermined switch provided on the operation panel 61 is operated to drive the electric blower 13 .
- the electric blower 13 exerts suction power on the suction inlet body 70 via the suction inlet 13 a , and then through the second air passage 32 , the dust collector 20 , and the first air passage 31 .
- the suction inlet 81 When the suction inlet 81 is selected by the suction inlet switch device 90 , airflow is suctioned through the first suction inlet 81 .
- the suction inlet 82 When the suction inlet 82 is selected by the suction inlet switch device 90 , airflow is suctioned through the second suction inlet 82 .
- the belt replacement device 120 places the belt 113 on the drive pulley 112 .
- the agitator 110 is driven by the driving of the electric blower 13 .
- the rotating agitator 110 lifts up dust from the floor or a footcloth spread over the floor.
- the agitator 110 is rotated on the floor of soft material (e.g. carpet having shag 4 to 20 mm long)
- the first ground support portion 101 sinks into the soft floor material.
- the agitator 110 and the first suction inlet 81 approach the soft floor material so that the dust is scooped out and suctioned powerfully.
- Providing a limit to the width of the first ground support portion 101 as viewed from the front e.g.
- adapting the total front width of the first ground support portion 101 to be not more than half the width of the first suction inlet 81 , or adapting each width of the ground support portion 101 to be 10 to 20 mm) ensures the sinking of the first ground support portion 101 into the soft floor material.
- the first ground support portion 101 sinks into the shag of the carpet, so that the front portion of the bottom plate 80 supports the suction inlet body 70 , thus ensuring the operability on the carpet.
- Adapting the space between the outer circumference of the agitator 110 and the rear edge of the first suction inlet 81 (G 1 in FIG. 5 ) to be between 5 and 10 mm can achieve a balance between operability and suction performance.
- a height (H 2 in FIG. 5 ) from the floor to the tip of the guide 103 is about 3 millimeter (may be between about 3 and 4.5 mm) greater than the height (H 1 in FIG. 5 ) from the floor to the entrance of the second suction inlet 82 ; therefore, the dust on the carpet is not eliminated even when the front portion of the bottom plate 80 is in contact with the carpet. If the dust is rice-grain sized, the guide 103 overrides the dust, and the dust is induced into the first suction inlet 81 . In order to ensure overriding performance over the dust, the inclination angle of the inclined surface 104 may be not more than 40 to 50 degrees with respect to the horizontal plane.
- the dust scooped out by the agitator 110 enters the suction inlet 92 of the suction inlet switch device 90 together with the airflow flowing from the first suction inlet 81 , then passes through the connecting pipe 78 from the inside of the suction inlet switch device 90 , and then enters the first air passage 31 .
- the airflow that has passed through the first air passage 31 enters through the air inlet 25 of the dust collector 20 into the centrifuge separator 23 .
- the airflow that has entered through the air inlet 25 swirls around the exhausted pipe 26 at high speed.
- the dust in the airflow is separated from the airflow by centrifugal force and thus stays at the bottom of the dust cup 21 .
- the swirling airflow from which the dust has been separated is suctioned into the exhaust pipe 26 and then reaches the exhaust chamber 24 .
- the dust that has not been separated by centrifugation is filtered by the filter 28 .
- the air flow that has reached the exhaust chamber 24 flows outside through the air outlet 30 .
- the airflow that swirls in the centrifuge separator 23 swirls not only around the exhaust pipe 26 but also around the stabilizer 29 , during which the dust contained in the airflow is separated from the airflow and drops on the bottom of the dust cup 21 when the airflow hits the fin of the stabilizer 29 . Further continuation of the dust suction develops a dust ball on the bottom of the dust cup 21 .
- the stabilizer 29 suppresses the motion of this dust ball to prevent the dust from stirring up again.
- the airflow exiting from the dust collector 20 enters the second air passage 32 .
- the second air passage 32 connects with the suction inlet 13 a in substantially the same plane, which permits the airflow to go straight into the suction inlet 13 a without any blockage and disturbance.
- the hollow portion itself of the dust collector holder 12 forms the second air passage 32 , the air passage of a large area can be provided, so that the circulation efficiency of the airflow also improves in this regard.
- the airflow suctioned into the electric blower 13 is discharged into the exhaust space 50 and then enters the base portion 16 .
- the fine dust not filtered by the filter 28 is filtered by the filter 51 , and then the airflow is discharged through the exhaust outlet 54 .
- the belt 113 runs while the electric blower 13 is driven. No protection can be provided against the contact of the running belt 113 with the fork 150 .
- the belt 113 makes contact with the parallel walls 151 a of the main body 151 made of metal. Therefore, although the temperature of the main body 151 inevitably increases due to frictional heat, unlike the one made of synthetic resin, the main body 151 does not overheat and thus does not get damaged, and also is less susceptible to friction.
- the pedal 134 is operated to switch the suction inlet switch device 90 to the second suction inlet 82 .
- the state in which the switch valve 95 has the air inlet 92 open and the air inlet 93 closed is changed to the state in which the switch valve 95 has the air inlet 93 open and the air inlet 92 closed.
- the valve shaft 96 rotates counterclockwise (in the direction of an arrow A) as viewed in FIG. 8 . Consequently, the lever 132 lifts up the end portion 161 a of the crank 161 , and the entire crank 161 rotates within the bearings 162 clockwise (in the direction of an arrow B).
- the rotation of the fork 150 counterclockwise as viewed from the front causes the parallel walls 151 a to move from the right to the left while drawing an arc with the radius thereof equal to the distance from the center of the spindle 121 .
- the belt 113 on the drive pulley 112 is replaced around the idler 114 .
- the fork 150 rotates around the axis line parallel to the extension direction of the belt 113 , and does not have structure that amplifies vibration at the parallel walls 151 a located at the end thereof. Therefore, the movement of the belt 113 is always stable. Further, the limits of rotation of the fork 150 are defined by the stopper means 153 , thus permitting the belt 113 to be positioned at a predetermined location.
- the parallel walls 151 a keep themselves parallel to the extension direction of the belt 113 however many times the rotatably supporting portion 152 is rotated. Therefore, deformation (twist, entanglement) of the belt 113 is small. This means that little damage occurs to the parallel walls 151 a and the belt 113 .
- Switching from the first suction inlet 81 to the second suction inlet 82 may be achieved by operating the operation portion 152 a .
- the operation portion 152 a is located at the right end of the window 75 a while the first suction inlet 81 is in use. Moving the operation portion 152 a to the left end of the window 75 a causes the fork 150 to rotate counterclockwise as viewed from the front, so that the belt 113 is replaced from the drive pulley 112 to the idler 114 .
- the lever 154 comes down to press down the rear portion of the lever 155 .
- the front portion of the lever 155 comes up to lift up the end portion 161 b of the crank 161 .
- crank 161 rotates within the bearings 162 in the direction opposite to the arrow B, causing the end portion 161 a of the crank 161 to lift up the longer arm of the lever 132 .
- This rotates the valve shaft 96 in the direction opposite to the arrow A, causing the switch valve 95 to transfer to the position that opens the air inlet 93 and closes the air inlet 92 .
- the first ground support 101 stably maintains the space between the entrance of the second suction inlet 82 and the floor made of hard material at a predetermined value (0.8 to 2 mm). This ensures a dust passage between the second suction inlet 82 and the floor.
- the second suction inlet 82 has a smaller opening area than the first suction inlet 81 , and thus the suction power concentrates in the narrow area.
- the airflow suctioned at high speed is generated at the entrance of the second suction inlet 82 , so that the suction power acts on the dust which is stronger than is provided by the suction method that involves the rotation of the agitator.
- Providing the space at 0.8 to 2 mm permits efficient suction of sandy and powdery dust.
- the suctioned airflow passes through under the transparent or semi-transparent cover 86 .
- the cover 86 can be detached so as to remove the waste that is a cause of the passage clogging.
- Dust can be suctioned not only by use of the first and second suction inlets 81 or 82 , but also by use of the flexible hose 33 .
- the flexible hose 33 can be pulled out of the connecting pipe 78 , and a suction tool, such as a space nozzle or a furniture brush, can be fitted to the end of the flexible hose 33 to clean a narrow area or an area located high.
- the electric vacuum cleaner 1 is carried to the storage area for storing the electric vacuum cleaner 1 not in use, and then the vacuum cleaner body 10 is postured for storage. That is, the dust collector holder 12 is positioned upright. Consequently, the rear portion of the suction inlet body 70 comes down, the second ground support portion 102 hits the floor serving as a support for the suction inlet body 70 , and the first ground support portion 101 is lifted off the floor. The outer periphery of the agitator 110 is also lifted off the floor. Thus, even if the electric blower 13 is still being driven at this point of time, the agitator 110 does not rub against the floor, and thus does not scratch the floor.
- the outer periphery of the agitator 110 does not make contact with the floor. Therefore, even when the dust collector holder 12 is held at this position for a long period of time, the bristles implanted in the agitator 110 (or the flake formed of rubber or soft synthetic resin) does not become deformed.
- the latch 43 is detached, the dust collector 20 is pulled out, and then the dust inside is discarded.
- the filter 28 is cleaned if necessary. Subsequently, the dust collector 20 is set in the original position.
- the use of transparent or semi-transparent material for molding the dust cup 21 permits easy check of how much dust is accumulated.
- the widths of the second suction inlet 82 and the suction passage 85 may be broadened to the maximums. Specifically, the second suction inlet 82 and the suction passage 85 (the entrance portion thereof) may be broadened to such extent that the suction inlet body 70 is left only with the wall thicknesses of its right and left side walls. Although this results in a small decrease in the strength of the suction inlet body 70 , the width of the second suction inlet 82 involved in the suctioning broadens, leading to even further improvement in the suction power.
- FIG. 10 is a cross section of a suction inlet body 201 according to another example of the embodiment, broken away at its front center, as viewed from the side.
- FIG. 11 is a diagram of the suction inlet body as viewed from above, with a cover 203 removed for easier understanding of separate suction inlets 202 .
- rollers 205 as supports.
- the rollers 205 are rotatably fitted to a rear cover 207 of the suction inlet body 201 by roller shafts 206 that rotatably support the rollers 205 .
- Numeral 208 represents a rotary brush
- numeral 209 represents a partition wall
- numeral 210 represents a collective opening located in the rear side of the following passage.
- the partition wall 209 separates a separate suction inlet passage 211 extending from the separate suction inlets 202 from a suction inlet passage 214 extending from the suction inlet 204 .
- Inside the suction inlet body 202 there is arranged an equivalent, not shown, of the above-mentioned suction inlet switch device 90 used for switching between the suction inlets.
- the spatial dimension of a separate suction inlet passage 211 b leading from the front right and front left sides to the collective opening 210 is greater in the thickness direction than the spatial dimension of a separate suction inlet passage 211 a located at the central portion of the separate suction inlet passage 211 .
- the air passage rate becomes greater in the separate suction inlet passage 211 b than in the separate suction inlet passage 211 a . Therefore, even when the width of the separate suction inlet 202 is made smaller than that of the suction inlet body 201 , the suction power increases at the front right and front left sides, which permits reliable suction performed with the entire width of the suction inlet body 201 . Then the remaining width of the suction inlet body 201 can form reinforcement portions 213 , thus providing the suction inlet body 201 having great impact strength while maintaining good suction performance.
- the reinforcement portions 213 are respectively located in front of side shells 72 and 73 provided on the right and the left, respectively, of a flat-box type central shell 71 .
- the rear portions of the side shells 72 and 73 project more backward than the central shell 71 , forming rear projections 74 and 75 .
- the suction inlet body 201 has a C-shaped planer shape as a whole, and receives the vacuum cleaner body 10 between the rear projections 74 and 75 .
- a partition wall surface 215 on the suction inlet passage 214 side is rectilinear in the right-and-left direction; therefore, the air passage condition of the suction inlet passage 214 can be set regardless of the thickness-direction change in the separate suction inlet passage 211 .
- the exterior on the separate suction inlet passage 211 side of the suction inlet body 201 can be formed by a smooth surface that has no convex and concave portions even with a single wall, thus providing the suction inlet body 201 with good appearance.
- the thickness-direction dimension of the separate suction inlet passages 211 a and 211 b in the collective opening 210 side are adapted to be larger than or equal to the thickness-direction dimension thereof in the separate suction inlet 202 side. This reduces the possibility of waste clogging occurring in the separate suction inlet passage 211 . Moreover, since the air passage volume is adjusted by changing the thickness-direction dimension of the passage, the passages communicates with each other, thus forming one space without any obstacles. This permits the adjustment of the air passage volume with little loss, thus achieving even further improvement in the suction performance.
- the portion where the spatial thickness-direction dimension of the passage changes is so formed to have a surface that is increasingly inclined, instead of perpendicular or the like, adjustment loss is further reduced and also airflow is provided with little swirling, thus achieving the low-noise vacuum cleaner.
- the minimum thickness-direction spatial dimensions of the separate suction inlet 202 and the separate suction inlet passage 211 are set at, for example, 6 mm or more, paper pieces cut by a shredder is less likely to become jammed.
- the separate suction inlet passage 211 i.e., the passage running along the front and the top of the suction inlet passage 214
- the adjusting means for adjusting the air passage volume in a predetermined portion of the separate suction inlet 202 , the air passage volume can be adjusted gradually with no difficulties even in a region having a long passage. This permits the adjustment of the air passage volume with little loss, thus achieving further improvement in the suction performance.
- the provision of such an adjusting means is not limited to the separate suction inlet passage 211 , but it can be further provided in the suction inlet passage 214 or in the both.
- the air passage volume in the separate suction inlet passage 211 is adjusted from the partition wall 212 side.
- the adjustment of the air passage volume may be achieved by adjusting the thickness-direction spatial dimension of the passage from the cover 203 side.
- the outer exterior of the cover 203 is formed without any concave and convex portions, if the wall of the cover 203 is formed by projecting only the separate suction inlet passage 211 side thereof, the weight of the cover 203 increases and it becomes difficult to make the cover 203 transparent to check how the dust is flowing in the passage, thus accompanied by deteriorated detachability and functionality.
- the air passage volume can be adjusted by combination of the partition 212 side and the cover 203 side.
- the adjusting means for adjusting the air passage volume gives the corresponding suction inlet passage a different thickness-direction spatial dimension in a predetermined portion.
- the adjusting means is not limited to this method.
- a guide plate for adjusting the air passage volume may be provided in the relevant passage along the air passage route thereof, or an opening portion at a predetermined area, about 10 mm long, located in the central portion of the suction inlet may be sealed, though these measures result in small increase in air passage resistance.
- One of examples of the former is a guide plate provided in the separate suction inlet passage 211 such that the guide plate is located along part of the border between the separate suction inlet passage 211 a and the separate suction inlet passage 211 b shown in FIG. 11 .
- the suction inlet 204 corresponds to the first suction inlet 81
- the separate suction inlet 202 corresponds to the second suction inlet 82
- the suction inlet passage 214 corresponds to the suction passage 83
- the separate suction inlet passage 211 corresponds to the suction passage 85
- the collective opening 210 corresponds to the air outlet 87
- the rotary brush 208 corresponds to the agitator 110 .
- the present invention can provide an electric vacuum cleaner that has a suction inlet body provided with a plurality of suction inlets and that is capable of selectively using these suction inlets depending on a plurality of floors to be cleaned.
Abstract
A separation wall (212) with a larger thickness than a separation wall (209) is provided at the central part in a left/right direction of a suction inlet main body (201). This is made so that the central part of a separate suction inlet passage (211) has a smaller height in a thickness direction than both sides in the left/right direction of the separate suction inlet passage. As a result, a separate suction inlet passage (211 b), connected to a concentration opening (210) from the left and right sides at the front of the separate suction inlet passage (211), has a larger height than a separate suction inlet passage (211 a) at the central part of the separate suction inlet passage (211). This way, plural suction inlets are provided in the suction inlet main body, and each of the suction inlets can be selectively used depending on each cleaning on floor surfaces.
Description
- The present invention relates to the structure of a suction inlet of an electric vacuum cleaner.
- In an electric vacuum cleaner, dust is suctioned, together with airflow generated by the operation of an electric blower, through a suction inlet, and then the suctioned air flow is introduced into a dust collector to collect the dust. An example of a conventional electric vacuum cleaner of this type in which the suction inlet body is provided with a suction inlet is disclosed in Japanese Patent Application Published No. H8-164095.
- The structure as described in the above-mentioned Japanese Patent Application Published NO. H8-164095 has a single suction inlet, and thus brings about a problem that suction characteristics cannot set individually in accordance with a plurality of floors, such as a carpet, wooden floor, and tatami.
- In view of the above-mentioned problem, it is an object of the present invention to provide an electric vacuum cleaner having a suction inlet body provided with a plurality of suction inlets that can be selectively used depending on different cleaning operations on a plurality of floor surfaces.
- To achieve the object described above, according to one aspect of the present invention, a suction inlet body is provided with a plurality of suction inlets, and, of suction inlet passages respectively connecting with the plurality of suction inlets, at least one is provided with adjusting means for adjusting air passage volume in a predetermined portion of the corresponding suction inlet. Moreover, a suction inlet switch device is provided which switches among the plurality of suction inlets for use.
- Providing a plurality of suction inlets in this way permits setting suction characteristics in one suction inlet body in accordance with different usages. Providing the aforementioned passage with the means for adjusting the air passage volume in the predetermined portion of the suction inlet permits providing uniform wind speed at different portions of the suction inlet connecting with this passage, thus permitting steady suction, which results in improved suction performance. Moreover, if the air volume is adapted to increase at both side portions, even when the suction inlet cannot be provided in both the right and left ends of the suction inlet body, dust can be suctioned even in the regions at both the right and left sides of the suction inlet body, thus resulting in improved suction performance of the suction inlet body.
- Specifically, the separate suction inlet passage running along the front and the top of the suction inlet passage is provided with adjusting means for adjusting the air passage volume in a predetermined portion of the separate suction inlet, thus permitting the air passage volume to be adjusted gradually with no difficulties even in a region having a long passage. This permits the adjustment of the air passage volume with little loss, thus achieving further improvement in the suction performance.
- The adjusting means is so formed as to give the suction inlet passage provided therewith a different thickness-direction spatial dimension in a predetermined portion thereof. This permits the adjustment of the air passage volume in the suction inlet passage and the separate suction inlet passage where a relatively long air passage process can be set. In addition, since the air passage volume can be changed by changing the passage in the thickness direction, the air passages communicates with each other, thus forming one space without any obstacles. This permits the adjustment of the air passage volume with little loss, thus achieving even further improvement in the suction performance.
- Portions of the suction inlet passage leading from the both side portions of the suction inlet inward has a thickness-direction spatial dimension greater than another portion of the suction inlet passage. This increases the air passage volume at the both sides of the suction inlet body, which permits adapting the width of the suction inlet to be smaller than the width of the suction inlet body while providing the remaining width portions of the suction inlet body as reinforcement portions, thus achieving the suction inlet body having great impact strength.
- A partition wall between the separate suction inlet passage provided with the adjusting means and the suction inlet passage adjacent thereto has, on the side thereof facing the adjacent suction inlet passage, a partition wall surface that is rectilinear in the right/left direction. This permits setting the air passage condition of the suction inlet passage regardless of the change in the separate suction inlet passage, which permits freely setting the suction inlet and the separate suction inlet, thus easily achieving the suction inlet body provided with suction inlets well suited to their respective usages. In addition, the exterior on the separate suction inlet passage side of the suction inlet body can be formed by a smooth surface that has no convex and concave portions, thus achieving the suction inlet body with good appearance.
- The thickness-direction dimension of the suction inlet passage as measured at the inward side is greater than or equal to a thickness-direction dimension of the suction inlet passage as measured at the suction inlet side. This permits achieving the suction inlet body with the aforementioned suction inlet passages that encounter little waste clogging.
-
FIG. 1 is a perspective view of the electric vacuum cleaner according to a first embodiment of the present invention. -
FIG. 2 is a vertical cross section of the electric vacuum cleaner. -
FIG. 3 is a partially horizontal cross section of the main body of the electric vacuum cleaner. -
FIG. 4 is a side view of the electric vacuum cleaner, with its suction inlet body cross-sectioned. -
FIG. 5 is a partially enlarged cross section of the suction inlet body in a different condition from the condition shown inFIG. 4 . -
FIG. 6 is a perspective view of the suction inlet switch device. -
FIG. 7 is an exploded perspective view of the suction inlet switch device. -
FIG. 8 is a perspective view of the inner structure of the suction inlet body. -
FIG. 9 is a partial perspective view of the inner structure of the same suction inlet body as viewed from a different direction from the direction from whichFIG. 8 is viewed. -
FIG. 10 is a cross section of a suction inlet body, broken away at its front center, as viewed from the side. -
FIG. 11 is a diagram of the suction inlet body as viewed from above. -
FIG. 12 is a side view of the usage state of the electric vacuum cleaner with its suction inlet body cross-sectioned. - The structure of an
electric vacuum cleaner 1 according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 12. In the following description, it is defined that theelectric vacuum cleaner 1 is placed in the front, and the user operates theelectric vacuum cleaner 1 while standing behind it. It is thus defined that the side where the user stands is the rear side of theelectric vacuum cleaner 1 and the side opposite thereto is the forward side (front side) of theelectric vacuum cleaner 1. In terms of the right and left, when theelectric vacuum cleaner 1 is viewed from forward (the front), it is defined that the left side of the observer is the left side of theelectric vacuum cleaner 1 and the side opposite thereto is the right side of theelectric vacuum cleaner 1. - The
electric vacuum cleaner 1 is an upright type and is divided into two major parts. One of the parts corresponds to avacuum cleaner body 10, and the other part corresponds to asuction inlet body 70. A shell forming the suction inlet body 70 (e.g. shell formed of synthetic resin) has structure as described below. Thesuction inlet body 70 has a flat box-shapedcentral shell 71 on the center thereof andside shells side shells central shell 71, formingrear projections suction inlet body 70 has a C-shaped, planar form as a whole, and receives thevacuum cleaner body 10 between therear projections - The
vacuum cleaner body 10 is formed of two shell portions. One of the shell portions is acylindrical blower shell 11, and the other shell portion is adust collector holder 12 that projects from theblower shell 11. Theblower shell 11 has anelectric blower 13 arranged therein (seeFIG. 2 ). The axis of theelectric blower 13 and the axis of theblower shell 11 are substantially parallel to each other and are both substantially horizontal. - The
blower shell 11 is arranged between therear projections suction inlet body 70 with the axis thereof substantially horizontal, so that the spindle arranged on the axis thereof is fitted with therear projections rear projection 74 side, aspindle 14 projecting from the end surface of theblower shell 11 is rotatably supported by abearing 76 provided in therear projection 74. In therear projection 75 side, adrive shaft 15, i.e., the extension of the motor shaft of theelectric blower 13, enters into therear projection 75. A cylindrical spindle (omitted from the figure) that wraps thedrive shat 15 is projected from an end surface of theblower shell 11 so as to be rotatably supported by abearing 77 provided in therear projection 75. Theblower shell 11 is coupled with thesuction inlet body 70 by these spindles on the right and left sides so as to be rotatable around the horizontal axis. - The
dust collector holder 12 is hollow-shaped, and formed long and slender as a whole, i.e., lies longitudinally. The longitudinal direction of thedust collector holder 12 is substantially perpendicular to the axis of theblower shell 11. The dust collector holder 12 projects not from the center of theblower shell 11 but one-sidedly from either the left or right thereof. In the first embodiment, the dust collector holder 12 projects from the left of theblower shell 11. - To one side of the
dust collector holder 12, there are provided abase 16 and anoverhang 17 for supporting the bottom and the top, respectively, of a dust collector to be described later. Thebase 16 is so provided as to stand upward from theblower shell 11. Theoverhang 17 is formed on the side surface of thedust collector holder 12. Both thebase 16 and theoverhang 17 are located in the space above theblower shell 11, i.e., right of thedust collector holder 12. Between thebase 16 and theoverhang 17, there is provided arear support wall 18 which supports the left half of the dust collector to be described later from behind (seeFIG. 3 ). Therear support wall 18 is formed on the side surface of thedust collector holder 12. -
Numeral 20 represents a dust collector. In acylindrical dust cup 21, thedust collector 20 swirls airflow at high speed so as to collect dust in a cyclone method. As shown inFIG. 2 , the inside of thedust cup 21 is divided by ahorizontal wall 22 into two sections: upper and lower chambers. The upper section is acentrifuge chamber 23, and the lower section is anexhaust chamber 24. - On the side surface of the
centrifuge chamber 23, there is provided anair inlet 25 which is arranged at such location and angle as to generate airflow swirling along the inner peripheral wall of thecentrifuge chamber 23. - In the center of the
centrifuge chamber 23, there is arranged anexhaust pipe 26 which is a cylindrical basket-like member having an open upper portion and a closed lower portion. Theexhaust pipe 26 has the upper open portion bonded to avent 27, which is formed on the center of thehorizontal wall 22, so as to be supported by thehorizontal wall 22 in a drooping manner. Afilter 28 of fine meshes woven with synthetic fiber, such as nylon, is attached to the outer peripheral surface of theexhaust pipe 26. - To the lower end of the
exhaust pipe 26, there is fitted astabilizer 29 which has four fins radially combined together so as to have a cruciate horizontal cross-section, with the end thereof reaching the vicinity of the bottom of thedust cup 21. Thestabilizer 29 promotes the separation of dust from airflow and also reduces the movement of dust accumulated on the bottom of thedust cup 21. - The
dust collector 20 is provided with an access opening by an appropriate technique for the purpose of discarding dust in thedust cup 21 and cleaning thefilter 28. For example, the access opening may be achieved by providing structure such that an opening is provided in the top of thedust cup 21 and then covered with a lid so that, when the lid is opened, theexhaust pipe 26 and thestabilizer 29 can be pulled out together with thehorizontal wall 22. Alternatively, the access opening may be achieved by providing thedust collector 20 with the dust cup having upper-and-lower-section structure including theexhaust chamber 24 and thecentrifuge chamber 23 that are removable from the body of the dust collector. - An
air outlet 30 is formed in theexhaust chamber 24. As shown inFIG. 3 , both theair inlet 25 and theair outlet 30 are provided in the side surface of thedust collector 20 which faces thedust collector holder 12. Theair inlet 25 and theair outlet 30 are oriented in the same direction, i.e., substantially leftward. - For the
air inlet 25 of thedust collector 20, afirst air passage 31 is provided. For theair outlet 30, asecond air passage 32 is provided. Thefirst air passage 31 communicates with a suction inlet (to be described in detail later) of thesuction inlet body 70, and directs airflow suctioned through the suction inlet to theair inlet 25. Thesecond air passage 32 communicates with a suction inlet of theelectric blower 13, and directs airflow discharged through theair outlet 30 to theelectric blower 13. - The
first air passage 31 is mainly formed of aflexible hose 33. One end of theflexible hose 33 is fixed to one end of a connecting pipe 34 (seeFIG. 3 ) provided horizontally in thedust collector holder 12. The other end of the connectingpipe 34 serves as anoutlet 35 of thefirst air passage 31, to which anair inlet 25 of thedust collector 20 is connected. Aseal ring 36 is fitted to theoutlet 35 in order to maintain air tightness when connected with theair inlet 25. The other end of theflexible hose 33 is removably fitted with a connectingpipe 78 that projects from the top surface of theside shell 72 of thesuction inlet body 70. The connectingpipe 78 communicates with the suction inlet. - The
first air passage 31 may be mainly formed of a tubular body instead of a flexible hose. For example, the flexible hose may be replaced with a plurality of hard pipes elastically connected together. The tubular body may be of any type which can absorb the difference in the distance from the connectingpipe 34 to the connectingpipe 78 between when the vacuumcleaner body 10 is upright and when it is tilted, and also which does not become crushed when the inner pressure declines below the atmosphere pressure. - The
second air passage 32 is formed of the hollow portion itself of thedust collector holder 12. The upper area of the hollow portion is partitioned off by awall 12 a (seeFIG. 2 ), so that thesecond air passage 32 does not communicate with theoverhang 17. In the side surface of thedust collector holder 12, aninlet 37 of thesecond air passage 32 is formed at a position corresponding to theair inlet 30 of thedust collector 20. Aseal ring 38 is fitted to theinlet 37 in order to maintain air tightness when connected with theoutlet 30. - As shown in
FIG. 2 , the bottom end of thesecond air passage 32 reaches the bottom of theblower shell 11. Anoutlet 39 is provided in the side wall of the bottom end of thesecond air passage 32, to which asuction inlet 13 a of theelectric blower 13 is directly connected through a vibration-proof cushion 40 that also serves for maintain air tightness. - The
dust collector 20 is fitted to thedust collector holder 12 by being pressed against thedust collector holder 12 in a manner such that the longitudinal direction of thedust collector 20 agrees with the longitudinal direction of thedust collector holder 12. More specifically, thedust collector 20 is fitted by being inserted in the space surrounded by thebase 16, theoverhang 17, and therear support wall 18. - On the upper end of the
dust collector 20, there is provided aslide latch 43 which is constantly pressed upward by a spring, not shown, and comes into engagement with the edge of theoverhang 17 at the final stage of the insertion of thedust collector 20. In this state, thedust collector 20 cannot be removed from thedust collector holder 12 unless thelatch 43 is % pressed down against the spring, not shown, so as to be separated from theoverhang 17. - The inside of the
base 16 communicates with anexhaust space 50 into which theelectric blower 13 exhausts air. Moreover, afilter 51 is inserted in thebase 16. As thefilter 51 collects fine dust that has passed through thefilter 28 of thedust collector 20, a filter, such as HEPA (high-efficiency particulate air) filter, for example, may be used which offers higher filtering performance than thefilter 28 does. - The airflow after the dust is trapped by the
filter 51 returns into the chamber through anexhaust outlet 54 formed in the front surface of thebase 16. Theexhaust outlet 54 is formed of a plurality of horizontal slits aligned vertically. - Inside the
overhang 17, there is arranged a controller 60 (seeFIG. 2 ) which is connected to theelectric blower 13 through a lead wire. Thecontroller 60 controls the entire operation of theelectric vacuum cleaner 1. The upper front portion of theoverhang 17 serves as anoperation panel 61 where various switch buttons are arranged. Theoperation panel 61 is easily operated since it is provided in theoverhang 17. - A
handle 62 separately molded is fixed with the tip of thedust collector holder 12. From the lower rear portion of theblower shell 11, there projects obliquely downward abracket 63, to which wheels 64 (seeFIG. 4 ) are fitted. There is provided onewheel 64 on each of the right and left ends of theblower shell 11. In front of thewheels 64, there are provided supportinglegs 65, one on each of the right and left. Thus, when thedust collector holder 12 is placed perpendicularly, the vacuumcleaner body 10 is supported on the floor at four points thereof by thewheels 64 and the supportinglegs 65. - Next, the structure of the
suction inlet body 70 will be described below. As described above, thesuction inlet body 70 is formed by providing on the left and right sides of the flat box-shapedcentral shell 71 theside shells rear projections central shell 71 andside shells - The bottoms of the
central shell 71 and theside shells bottom plate 80. Thebottom plate 80 has a plurality of suction inlets formed at the front portion thereof. Thebottom plate 80 has a rear portion with a surface so inclined as to become higher increasingly rearward. - In the front portion of the
bottom plate 80 of the first embodiment, two suction inlets are arranged one behind another. Thefirst suction inlet 81 is elongated in the right-and-left direction, and has a width substantially equal to the width of thesuction inlet body 70 excluding a belt-driving portion to be described later. Thesecond suction inlet 82 is formed, located in the front side of and also in parallel to thefirst suction inlet 81. Thesecond suction inlet 82 has the area of opening much smaller than that of thefirst suction inlet 81. - There are provided suction passages individually for the first and
second suction inlets suction passage 83 for thefirst suction inlet 81 is formed in the bottom face of the central shell 71 (seeFIG. 4 ). Thesuction passage 83 has a funnel-like form and has anair outlet 84 that is biased leftward, as viewed from the front. - The
suction passage 85 for thesecond suction inlet 82 is arranged in such a manner as to overlap thesuction passage 83. Thesuction passage 85 is formed between the top of thecentral shell 71 and acover 86 removably fitted thereto with a space in between. Thecover 86 has a front end thereof hooked over thecentral shell 71 and the rear end coupled with thecentral shell 71 by a screw or alatch 86 a so as to be kept fitted. Thecover 86 is formed of transparent or semi-transparent material and permits viewing the inside of thesuction passage 85 from outside. Anair outlet 87 of thesuction passage 85 is provided around the rear center of thesuction passage 85. - Inside the
rear projection 74 of theside shell 72, there is arranged a suctioninlet switch device 90 which has in front of avalve casing 91thereof air inlets lower air inlet 92 is connected to theair outlet 84 of thesuction passage 83. As shown inFIG. 4 , the direct connection of theair outlet 84 to theair inlet 92 permits simple structure of the air passage and thereby improves flow efficiency. Theupper air inlet 93 is connected to theair outlet 87 of thesuction passage 85 via a hose, not shown. - In the top surface of the
valve casing 91, there is provided an air outlet that is common to theair inlets pipe 78 that is a start point of thefirst air passage 31. - There is arranged in the valve casing 91 a
switch valve 95 which rotates within the vertical plane. Theswitch valve 95 is fitted to avalve axis 96 and rotates with the rotation of thevalve axis 96. This rotation causes theswitch valve 95 to selectively close one of theair inlets inlet switch device 90 will be described later in detail. To both surfaces of theswitch valve 95, there is fitted a seal member (not shown) formed of soft rubber or the like so as to provide better air tightness when theair inlets - On the bottom surface of the
suction inlet body 70, there are provided a first and a second ground support portions. The firstground support portion 101 is formed of wheels so provided as to be located near thesecond suction inlet 82, i.e., at the both ends of thesecond suction inlet 82 in this case. - The second
ground support portion 102 is formed of a pair of right and left projections formed on thebottom plate 80. The secondground support portion 102 is provided behind thefirst suction inlet 81, around where the rear portion of thebottom plate 80 starts to incline. When thedust collector holder 12 is positioned upright, as shown inFIG. 4 , the secondground support portion 102 supports thesuction inlet body 70, and the firstground support portion 101 is lifted off the floor. - From the front end of the
suction inlet body 70, there is projected aguide 103 which is located in front of thesuction inlet 82 and has a width substantially equal to the total width of thesuction inlet body 70. The bottom surface of theguide 103 becomes an inclined surface 104 (seeFIG. 5 ) that increasingly lowers toward thesecond suction inlet 82. The front end of theinclined surface 104 is located about 3 mm higher than the entrance of thesecond suction inlet 82. - In the
first suction inlet 81, there is provided anagitator 110. As theagitator 110, it is a common practice to use one formed by planting a plurality of rows of bristles in the circumference of a cylindrical rotating body at a predetermined angle. Anagitator 110 may be used which is provided with a flake formed of rubber or soft synthetic resin instead of the rows of bristles. The axial direction of theagitator 110 is equal to the lateral width direction of thefirst suction inlet 81. Theagitator 110 has part of the outer periphery thereof rotatably supported inside thesuction inlet body 70 so as to project outward through thefirst suction inlet 81. - The source of rotational power of the
agitator 110 is a drive shat 15 of theelectric blower 13, from which the power is transmitted to theagitator 110 via the following power transmitting mechanism. As shown inFIG. 2 , thedrive shaft 15 is fixed with apower pulley 111. Abelt 113 is wound around thepower pulley 111 and a drive pulley (to be described later) that is so fixed with the shaft of theagitator 110 as to rotate integrally with theagitator 110. Thepower pulley 111 and thebelt 113 are located inside theside shell 73. Alternatively, thebelt 113 may be directly wound around thedrive shaft 15 without fixing the separately providedpower pulley 111 with thedrive shaft 15. - There is aligned with the drive pulley an idler that is rotatable independently from the agitator so as to permit stopping the rotation of the
agitator 110 during the operation of theelectric blower 13. When the belt is placed over the idler, the idler only makes idle running, so that no power is transmitted to theagitator 110. Inside theside shell 73, there is provided abelt replacement device 120 for performing replacement of thebelt 113. The structure of thebelt replacement device 120 will be described later in detail. - The detailed structure of the suction
inlet switch device 90 will be described with reference toFIGS. 6 and 7 . Thevalve casing 91 of the suctioninlet switch device 90 has an opening in the left side surface thereof. This opening is closed by acover 131 which is fixed with thevalve casing 91 by screws. In order to maintain good air tightness, aseal member 91 a is attached to the edge of the opening of thevalve casing 91. - On the
valve shaft 96, there are integrally formed aswitch valve 95 and alever 132. Thevalve shaft 96, theswitch valve 95, and thelever 132 may be integrally formed by injection molding or the like by use of synthetic resin or metal. Alternatively, they may be separately formed, and then assembled and fixed together. - The
valve shaft 96 has on the right end thereof a reduceddiameter portion 96 a that projects to the right side surface of thevalve casing 91 through a shaft hole (not shown) provided in thevalve casing 91. The left portion of the reduceddiameter portion 96 a is rotatably supported in such a manner as to be sandwiched between aconcave portion 91 b that is formed in the inner surface of thevalve casing 91 and has a semicircle cross section and asemicircle notch 131 a that is formed in thecover 131. That is, one bearing portion is formed by combining theconcave portion 91 b and thenotch 131 a together. Theconcave portion 91 b is located between theair inlets valve casing 91. Such arrangement of theconcave portion 91 b in the upstream side of airflow is made for the purpose of preventing the operation of theswitch valve 95 from being affected by dust caught around thevalve shaft 96. - On the position of the
shaft valve 96 exiting from thenotch 131 a, there is integrally formed alever 132 which is one component of an interlock means for interlocking the suctioninlet switch device 90 with thebelt replacement device 120. Because, in addition to theswitch valve 95, thelever 132 is integrally formed, material provided with a predetermined level of strength, such as engineering-plastic-grade synthetic resin or metal, is used for thevalve shaft 96. - The
lever 132 has long andshort arms long arm 132 a, there is provided aslit 132 c whose longitudinal direction agrees with the longitudinal direction of thelog arm 132 a. Atoggle spring 133 is arranged between theshort arm 132 b and thecover 131. - The
toggle spring 133 is formed of a torsion coil spring, with one end thereof engaged with the end of theshort arm 132 b and with the other end thereof engaged with ahollow boss 131 b formed on the outer surface of thecover 131. The angular position of thevalve shaft 96 where theshort arm 132 b and thehollow boss 131 b approach closest to each other is a change point as a border that provides theswitch valve 95 with power for closing theair inlet 92 or power for closing theair inlet 93. - To the left end of the
valve shaft 96, there is fitted apedal 134 for making switch operation with the switch valve 95 (seeFIG. 1 ). Thepedal 134 is arranged on aconcave portion 74 a formed on the left upper corner of therear projection 74 of thesuction inlet body 70. Thepedal 134 has front and rear portions forming together a certain angle relative to the center lying at the area where thevalve shaft 96 is fitted, and thus looks bent when viewed from the side. Stepping on either the front or rear portion of thepedal 134, whichever is lifted, causes thepedal 134 to make seesaw-like movement, thereby rotating thevalve shaft 96. - Next, the detailed structure of the
belt replacement device 120 will be described with reference toFIGS. 8 and 9 . Thebelt replacement device 120 is assembled mainly by a long,slender frame 141. Theframe 141 is fixed inside theside shell 73 so that the longitudinal direction of theframe 141 is directed in the front-and-back direction of thesuction inlet body 70. Thebelt 113 passes through the lower portion of theframe 141, and is replaced between thedrive pulley 112 and theidler 114. Thedrive pulley 112 is fixed with theshaft 110 a of theagitator 110 so as to rotate integrally withagitator 110. Theidler 114 is located on the right side of thedrive pulley 112, and is rotatable independently from theagitator 110. - The
frame 141 supports aspindle 142 that extends in the front-and-back direction. The axis line of thespindle 142 is parallel to the extension direction of thebelt 113. Thespindle 142 rotatably supports afork 150 for moving thebelt 113. Thefork 150 is formed by amain body 151 made of metal and arotatably supporting portion 152 made of synthetic resin that are so combined together as to be mutually non-rotatable. Themain body 151 and therotatably supporting portion 152 of thefork 150 are fixed together by insert molding, screwing, swaging, or the like. As therotatably supporting portion 152 is made of synthetic resin, little noise is generated when it rotates with respect to thespindle 142. - The
main body 151 of thefork 150 extends in front of therotatably supporting portion 152 such that the longitudinal direction of themain body 151 is parallel to the extension directions of thespindle 142 and thebelt 113. Themain body 151 holds thebelt 113 between a pair ofparallel walls 151 a formed on the end thereof. Theparallel walls 151 a extend in parallel to themain body 151 while being kept parallel to each other. The parallel walls 111 a are spaced at a predetermined distance from therotatably supporting portion 152. - On the top of the
rotatably supporting portion 152, there is provided anoperation portion 152 a that projects in the form of knob. Theoperation portion 152 a projects outward through awindow 75 a formed in therear projection 75 of thesuction inlet body 70. The area where theoperation portion 152 a hits the vicinity of one end of thewindow 75 a is one rotation limit of therotatably supporting portion 152. The area where theoperation portion 152 a hits the vicinity of the other end of thewindow 75 a is the other rotation limit of therotatably supporting portion 152. Specifically, theoperation portion 152 a and thewindow 75 a form a stopper means 153 that defines the rotation limits of thefork 150. For hitting thewindow 75 a, theoperation portion 152 a may hit theside shell 73 or theframe 141. - Between the
rotatably supporting portion 152 and theframe 141, there is arranged a toggle spring, not shown, which is formed of a torsion coil spring, as is the case with thetoggle spring 133. One end of the toggle spring engages with therotatably supporting portion 152, and the other end thereof engages with theframe 141, thereby permitting smooth angle change of therotatably supporting portion 152. - From the left side surface of the
rotatably supporting portion 152, alever 154 projects radially. On the left side surface of theframe 141, there is alever 155 so supported as to be rotatable by aspindle 156 within the vertical plane. Aslit 155 a provided in one arm of thelever 155 engages with thelever 154. The other arm of thelever 155 also has aslit 155 b. The longitudinal directions of theslits lever 155 itself extends. - The suction
inlet switch device 90 and thebelt replacement device 120 are coupled together by an interlocking means 160. The main part of the interlocking means 160 is acrank 161 formed by bending a steel rod or steel pipe into a substantially C shape. Thecrank 161 is rotatably supported inside thesuction inlet body 70 so as to be rotatable about the horizontal axis by a pair of right and leftbearings 162. Thecrank 161 has oneend 161 a thereof engaged with theslit 132 c of thelever 132 on the suctioninlet switch device 90 side. Thecrank 161 has theother end 161 b thereof engaged with theslit 155 b of thelever 155 on thebelt replacement device 120 side. Thelever 155, as well as thelever 132, is one component of the interlocking means 160. - The structure as described above, in which the C-shaped
suction inlet body 70 sandwiches the vacuumcleaner body 10 with the suctioninlet switch device 90 arranged in one end of thesuction inlet body 70 and thebelt replacement device 120 arranged in the other end thereof, permits certain portions of the suctioninlet switch device 90 and thebelt replacement device 120 to overlap the left and right sides of the vacuumcleaner body 10, thereby permitting reduction of the size, particularly the size in the front-and-right direction, of thesuction inlet body 70. - Next, how the
electric vacuum cleaner 1 operates will be described below. When theelectrical vacuum cleaner 1 is not in operation, i.e. is in storage, as shown inFIG. 4 , thedust collector holder 12 is in an upright state, and the vacuumcleaner body 10 is four-point-supported on the floor by two each of thewheels 64 and the supportinglegs 65. For thesuction inlet body 70, the secondground support portion 102 supports thesuction inlet body 70, and the firstground support portion 101 is lifted off the floor. Theagitator 110 is also not in contact with the floor. - In order to use the
electric vacuum cleaner 1, a code, not shown, is extended and then connected to an outlet. With thehandle 62 held in one hand, as shown inFIG. 12 , thedust collector holder 12 is tilted to change its posture in preparation for cleaning. Then the vacuumcleaner body 10 acts like a lever. Specifically, thehandle 62 serves as a power point of the lever, thewheel 64 serves as the fulcrum of the lever, and thespindle 14 and the drive shaft 15 (i.e., the cylindrical spindle surrounding the drive shaft 15) serve as working points of the lever. Thus, thespindle 14 and the drive shaft 15 (i.e., the cylindrical spindle surrounding the drive shaft 15) lift up the rear portion of thesuction inlet body 70, and the supportinglegs 65 separates from the floor. - When the vacuum
cleaner body 10 is tilted to the point where thehandle 62 reaches the height of between 60 cm and 80 cm from the floor, the secondground support portion 102 separates from the floor, and the front portion of thebottom plate 80 having the first andsecond suction inlets ground support portion 101 and theagitator 110 make contact with the floor (seeFIG. 5 ). The height of between 60 and 80 cm corresponds to the height of thehandle 62 that permits an adult of average physical size to push and pull theelectric vacuum cleaner 1 for cleaning. - In this state, the degree of projection of the first
ground support portion 101 is adjusted so that the height (H1 inFIG. 5 ) from the floor to the entrance of thesecond suction inlet 82 becomes 0.8 to 2 mm. Thesecond suction inlet 82 approaches the floor up to this distance (0.8 to 2 mm), where the firstground support portion 101 hits the floor, and thus does not approach the floor any further. - Now, a predetermined switch provided on the
operation panel 61 is operated to drive theelectric blower 13. Theelectric blower 13 exerts suction power on thesuction inlet body 70 via thesuction inlet 13 a, and then through thesecond air passage 32, thedust collector 20, and thefirst air passage 31. - When the
suction inlet 81 is selected by the suctioninlet switch device 90, airflow is suctioned through thefirst suction inlet 81. When thesuction inlet 82 is selected by the suctioninlet switch device 90, airflow is suctioned through thesecond suction inlet 82. When thefirst suction inlet 81 is selected, thebelt replacement device 120 places thebelt 113 on thedrive pulley 112. Thus, theagitator 110 is driven by the driving of theelectric blower 13. - The following description is based on the assumption that the
first suction inlet 81 has been selected by the suctioninlet switch device 90. Therotating agitator 110 lifts up dust from the floor or a footcloth spread over the floor. When theagitator 110 is rotated on the floor of soft material (e.g. carpet having shag 4 to 20 mm long), the firstground support portion 101 sinks into the soft floor material. Thus, theagitator 110 and thefirst suction inlet 81 approach the soft floor material so that the dust is scooped out and suctioned powerfully. Providing a limit to the width of the firstground support portion 101 as viewed from the front (e.g. adapting the total front width of the firstground support portion 101 to be not more than half the width of thefirst suction inlet 81, or adapting each width of theground support portion 101 to be 10 to 20 mm) ensures the sinking of the firstground support portion 101 into the soft floor material. - As described above, on the carpet, the first
ground support portion 101 sinks into the shag of the carpet, so that the front portion of thebottom plate 80 supports thesuction inlet body 70, thus ensuring the operability on the carpet. Adapting the space between the outer circumference of theagitator 110 and the rear edge of the first suction inlet 81 (G1 inFIG. 5 ) to be between 5 and 10 mm can achieve a balance between operability and suction performance. - A height (H2 in
FIG. 5 ) from the floor to the tip of theguide 103 is about 3 millimeter (may be between about 3 and 4.5 mm) greater than the height (H1 inFIG. 5 ) from the floor to the entrance of thesecond suction inlet 82; therefore, the dust on the carpet is not eliminated even when the front portion of thebottom plate 80 is in contact with the carpet. If the dust is rice-grain sized, theguide 103 overrides the dust, and the dust is induced into thefirst suction inlet 81. In order to ensure overriding performance over the dust, the inclination angle of theinclined surface 104 may be not more than 40 to 50 degrees with respect to the horizontal plane. - The dust scooped out by the
agitator 110 enters thesuction inlet 92 of the suctioninlet switch device 90 together with the airflow flowing from thefirst suction inlet 81, then passes through the connectingpipe 78 from the inside of the suctioninlet switch device 90, and then enters thefirst air passage 31. The airflow that has passed through thefirst air passage 31 enters through theair inlet 25 of thedust collector 20 into thecentrifuge separator 23. - The airflow that has entered through the
air inlet 25 swirls around the exhaustedpipe 26 at high speed. The dust in the airflow is separated from the airflow by centrifugal force and thus stays at the bottom of thedust cup 21. The swirling airflow from which the dust has been separated is suctioned into theexhaust pipe 26 and then reaches theexhaust chamber 24. The dust that has not been separated by centrifugation is filtered by thefilter 28. The air flow that has reached theexhaust chamber 24 flows outside through theair outlet 30. - The airflow that swirls in the
centrifuge separator 23 swirls not only around theexhaust pipe 26 but also around thestabilizer 29, during which the dust contained in the airflow is separated from the airflow and drops on the bottom of thedust cup 21 when the airflow hits the fin of thestabilizer 29. Further continuation of the dust suction develops a dust ball on the bottom of thedust cup 21. Thestabilizer 29 suppresses the motion of this dust ball to prevent the dust from stirring up again. - The airflow exiting from the
dust collector 20 enters thesecond air passage 32. Thesecond air passage 32 connects with thesuction inlet 13 a in substantially the same plane, which permits the airflow to go straight into thesuction inlet 13 a without any blockage and disturbance. As the hollow portion itself of thedust collector holder 12 forms thesecond air passage 32, the air passage of a large area can be provided, so that the circulation efficiency of the airflow also improves in this regard. - The airflow suctioned into the
electric blower 13 is discharged into theexhaust space 50 and then enters thebase portion 16. The fine dust not filtered by thefilter 28 is filtered by thefilter 51, and then the airflow is discharged through theexhaust outlet 54. - The
belt 113 runs while theelectric blower 13 is driven. No protection can be provided against the contact of the runningbelt 113 with thefork 150. However, thebelt 113 makes contact with theparallel walls 151 a of themain body 151 made of metal. Therefore, although the temperature of themain body 151 inevitably increases due to frictional heat, unlike the one made of synthetic resin, themain body 151 does not overheat and thus does not get damaged, and also is less susceptible to friction. Moreover, as theparallel walls 151 a are spaced at the predetermined distance from therotatably supporting portion 152, heat is radiated at themain body 151 located between theparallel walls 151 a and therotatably supporting portion 152, so that excessive frictional heat is not transmitted from theparallel walls 151 a to therotatably supporting portion 152. - In cleaning a corner of the room, the
pedal 134 is operated to switch the suctioninlet switch device 90 to thesecond suction inlet 82. Specifically, the state in which theswitch valve 95 has theair inlet 92 open and theair inlet 93 closed is changed to the state in which theswitch valve 95 has theair inlet 93 open and theair inlet 92 closed. In this state, thevalve shaft 96 rotates counterclockwise (in the direction of an arrow A) as viewed inFIG. 8 . Consequently, thelever 132 lifts up theend portion 161 a of thecrank 161, and theentire crank 161 rotates within thebearings 162 clockwise (in the direction of an arrow B). With this movement, theend portion 161 b of thecrank 161 lifts up the front portion of thelever 155, whereas the rear portion of thelever 155 comes down, pressing down thelever 154. This causes thefork 150 to rotate about the axis line of thespindle 142. The direction of this rotation is counterclockwise (the direction of an arrow C) as viewed from the front. - The rotation of the
fork 150 counterclockwise as viewed from the front causes theparallel walls 151 a to move from the right to the left while drawing an arc with the radius thereof equal to the distance from the center of the spindle 121. With this movement, thebelt 113 on thedrive pulley 112 is replaced around theidler 114. Thefork 150 rotates around the axis line parallel to the extension direction of thebelt 113, and does not have structure that amplifies vibration at theparallel walls 151 a located at the end thereof. Therefore, the movement of thebelt 113 is always stable. Further, the limits of rotation of thefork 150 are defined by the stopper means 153, thus permitting thebelt 113 to be positioned at a predetermined location. - The
parallel walls 151 a keep themselves parallel to the extension direction of thebelt 113 however many times therotatably supporting portion 152 is rotated. Therefore, deformation (twist, entanglement) of thebelt 113 is small. This means that little damage occurs to theparallel walls 151 a and thebelt 113. - When the
electric blower 13 is out of operation and thedrive shaft 15 is out of rotation, the replacement is not complete. Once theelectric blower 13 starts to be driven, thebelt 113 completely transfers to theidler 114. The same applies to when thebelt 113 is replaced from the idler 114 to the drivepulley 112. - Switching from the
first suction inlet 81 to thesecond suction inlet 82 may be achieved by operating theoperation portion 152 a. Specifically, theoperation portion 152 a is located at the right end of thewindow 75 a while thefirst suction inlet 81 is in use. Moving theoperation portion 152 a to the left end of thewindow 75 a causes thefork 150 to rotate counterclockwise as viewed from the front, so that thebelt 113 is replaced from thedrive pulley 112 to theidler 114. Simultaneously, thelever 154 comes down to press down the rear portion of thelever 155. The front portion of thelever 155 comes up to lift up theend portion 161 b of thecrank 161. Theentire crank 161 rotates within thebearings 162 in the direction opposite to the arrow B, causing theend portion 161 a of thecrank 161 to lift up the longer arm of thelever 132. This rotates thevalve shaft 96 in the direction opposite to the arrow A, causing theswitch valve 95 to transfer to the position that opens theair inlet 93 and closes theair inlet 92. - In suctioning dust by using the second suction inlet 2, the
first ground support 101 stably maintains the space between the entrance of thesecond suction inlet 82 and the floor made of hard material at a predetermined value (0.8 to 2 mm). This ensures a dust passage between thesecond suction inlet 82 and the floor. Thesecond suction inlet 82 has a smaller opening area than thefirst suction inlet 81, and thus the suction power concentrates in the narrow area. Thus, the airflow suctioned at high speed is generated at the entrance of thesecond suction inlet 82, so that the suction power acts on the dust which is stronger than is provided by the suction method that involves the rotation of the agitator. Providing the space at 0.8 to 2 mm permits efficient suction of sandy and powdery dust. - When the
second suction inlet 82 is in use, the suctioned airflow passes through under the transparent orsemi-transparent cover 86. This permits direct visual check of the suction condition of the dust. When thesecond suction passage 85 is clogged with waste, thecover 86 can be detached so as to remove the waste that is a cause of the passage clogging. - Dust can be suctioned not only by use of the first and
second suction inlets flexible hose 33. Theflexible hose 33 can be pulled out of the connectingpipe 78, and a suction tool, such as a space nozzle or a furniture brush, can be fitted to the end of theflexible hose 33 to clean a narrow area or an area located high. - After the cleaning is completed, the
electric vacuum cleaner 1 is carried to the storage area for storing theelectric vacuum cleaner 1 not in use, and then the vacuumcleaner body 10 is postured for storage. That is, thedust collector holder 12 is positioned upright. Consequently, the rear portion of thesuction inlet body 70 comes down, the secondground support portion 102 hits the floor serving as a support for thesuction inlet body 70, and the firstground support portion 101 is lifted off the floor. The outer periphery of theagitator 110 is also lifted off the floor. Thus, even if theelectric blower 13 is still being driven at this point of time, theagitator 110 does not rub against the floor, and thus does not scratch the floor. - As long as the
dust collector holder 12 is positioned upright, the outer periphery of theagitator 110 does not make contact with the floor. Therefore, even when thedust collector holder 12 is held at this position for a long period of time, the bristles implanted in the agitator 110 (or the flake formed of rubber or soft synthetic resin) does not become deformed. - Once a large amount of dust is accumulated in the
dust collector 20, thelatch 43 is detached, thedust collector 20 is pulled out, and then the dust inside is discarded. Thefilter 28 is cleaned if necessary. Subsequently, thedust collector 20 is set in the original position. The use of transparent or semi-transparent material for molding thedust cup 21 permits easy check of how much dust is accumulated. - The widths of the
second suction inlet 82 and thesuction passage 85 may be broadened to the maximums. Specifically, thesecond suction inlet 82 and the suction passage 85 (the entrance portion thereof) may be broadened to such extent that thesuction inlet body 70 is left only with the wall thicknesses of its right and left side walls. Although this results in a small decrease in the strength of thesuction inlet body 70, the width of thesecond suction inlet 82 involved in the suctioning broadens, leading to even further improvement in the suction power. -
FIG. 10 is a cross section of asuction inlet body 201 according to another example of the embodiment, broken away at its front center, as viewed from the side.FIG. 11 is a diagram of the suction inlet body as viewed from above, with acover 203 removed for easier understanding ofseparate suction inlets 202. As shown in these figures, in the both peripheral sides of theseparate suction inlets 202 located in the front side of asuction inlet 204, there are providedrollers 205 as supports. - The
rollers 205 are rotatably fitted to arear cover 207 of thesuction inlet body 201 byroller shafts 206 that rotatably support therollers 205.Numeral 208 represents a rotary brush, numeral 209 represents a partition wall, and numeral 210 represents a collective opening located in the rear side of the following passage. Thepartition wall 209 separates a separatesuction inlet passage 211 extending from theseparate suction inlets 202 from asuction inlet passage 214 extending from thesuction inlet 204. On the surface of thesuction inlet body 201 from the front to the right and left sides, there is fitted abumper 216 formed of, for example, soft synthetic resin. Inside thesuction inlet body 202, there is arranged an equivalent, not shown, of the above-mentioned suctioninlet switch device 90 used for switching between the suction inlets. - In the central portion in the right-and-left direction of the
suction inlet body 201, there is provided a littlethicker partition wall 212 in order to make the thickness-direction dimension of the separatesuction inlet passage 211 smaller than is provided at the right and left sides thereof. As a result, the spatial dimension of a separatesuction inlet passage 211 b leading from the front right and front left sides to thecollective opening 210 is greater in the thickness direction than the spatial dimension of a separatesuction inlet passage 211 a located at the central portion of the separatesuction inlet passage 211. - Thus, the air passage rate becomes greater in the separate
suction inlet passage 211 b than in the separatesuction inlet passage 211 a. Therefore, even when the width of theseparate suction inlet 202 is made smaller than that of thesuction inlet body 201, the suction power increases at the front right and front left sides, which permits reliable suction performed with the entire width of thesuction inlet body 201. Then the remaining width of thesuction inlet body 201 can formreinforcement portions 213, thus providing thesuction inlet body 201 having great impact strength while maintaining good suction performance. - The
reinforcement portions 213 are respectively located in front ofside shells central shell 71. The rear portions of theside shells central shell 71, formingrear projections suction inlet body 201 has a C-shaped planer shape as a whole, and receives the vacuumcleaner body 10 between therear projections - A
partition wall surface 215 on thesuction inlet passage 214 side is rectilinear in the right-and-left direction; therefore, the air passage condition of thesuction inlet passage 214 can be set regardless of the thickness-direction change in the separatesuction inlet passage 211. This permits the usages of thesuction inlet 204 and theseparate suction inlet 202 to be freely selected from among, for example, for floor, for carpet, etc., thus easily achieving thesuction inlet body 201 having suction inlets well suited for their respective intended usages. In addition, the exterior on the separatesuction inlet passage 211 side of thesuction inlet body 201 can be formed by a smooth surface that has no convex and concave portions even with a single wall, thus providing thesuction inlet body 201 with good appearance. - The thickness-direction dimension of the separate
suction inlet passages collective opening 210 side are adapted to be larger than or equal to the thickness-direction dimension thereof in theseparate suction inlet 202 side. This reduces the possibility of waste clogging occurring in the separatesuction inlet passage 211. Moreover, since the air passage volume is adjusted by changing the thickness-direction dimension of the passage, the passages communicates with each other, thus forming one space without any obstacles. This permits the adjustment of the air passage volume with little loss, thus achieving even further improvement in the suction performance. - If the portion where the spatial thickness-direction dimension of the passage changes is so formed to have a surface that is increasingly inclined, instead of perpendicular or the like, adjustment loss is further reduced and also airflow is provided with little swirling, thus achieving the low-noise vacuum cleaner. If the minimum thickness-direction spatial dimensions of the
separate suction inlet 202 and the separatesuction inlet passage 211 are set at, for example, 6 mm or more, paper pieces cut by a shredder is less likely to become jammed. - As described above, the separate
suction inlet passage 211, i.e., the passage running along the front and the top of thesuction inlet passage 214, is provided with the adjusting means (thepartition wall 212 in this embodiment) for adjusting the air passage volume in a predetermined portion of theseparate suction inlet 202, the air passage volume can be adjusted gradually with no difficulties even in a region having a long passage. This permits the adjustment of the air passage volume with little loss, thus achieving further improvement in the suction performance. However, the provision of such an adjusting means is not limited to the separatesuction inlet passage 211, but it can be further provided in thesuction inlet passage 214 or in the both. - As described above, the air passage volume in the separate
suction inlet passage 211 is adjusted from thepartition wall 212 side. Alternatively, the adjustment of the air passage volume may be achieved by adjusting the thickness-direction spatial dimension of the passage from thecover 203 side. In this case, however, since the outer exterior of thecover 203 is formed without any concave and convex portions, if the wall of thecover 203 is formed by projecting only the separatesuction inlet passage 211 side thereof, the weight of thecover 203 increases and it becomes difficult to make thecover 203 transparent to check how the dust is flowing in the passage, thus accompanied by deteriorated detachability and functionality. Further, the air passage volume can be adjusted by combination of thepartition 212 side and thecover 203 side. - The above description refers to the method in which the adjusting means for adjusting the air passage volume gives the corresponding suction inlet passage a different thickness-direction spatial dimension in a predetermined portion. However, the adjusting means is not limited to this method. For example, a guide plate for adjusting the air passage volume may be provided in the relevant passage along the air passage route thereof, or an opening portion at a predetermined area, about 10 mm long, located in the central portion of the suction inlet may be sealed, though these measures result in small increase in air passage resistance. One of examples of the former is a guide plate provided in the separate
suction inlet passage 211 such that the guide plate is located along part of the border between the separatesuction inlet passage 211 a and the separatesuction inlet passage 211 b shown inFIG. 11 . - In the above-mentioned embodiment, the
suction inlet 204 corresponds to thefirst suction inlet 81, and theseparate suction inlet 202 corresponds to thesecond suction inlet 82. Moreover, thesuction inlet passage 214 corresponds to thesuction passage 83, the separatesuction inlet passage 211 corresponds to thesuction passage 85, thecollective opening 210 corresponds to theair outlet 87, and therotary brush 208 corresponds to theagitator 110. - From the above description, it is clear that various modifications of the present invention are permitted. Therefore, it would be appreciated that the present invention may be implemented by departing from the detailed description within the scope of the accompanying claims.
- As described above, the present invention can provide an electric vacuum cleaner that has a suction inlet body provided with a plurality of suction inlets and that is capable of selectively using these suction inlets depending on a plurality of floors to be cleaned.
Claims (10)
1. An electric vacuum cleaner that suctions dust, together with airflow generated by operation of an electric blower, through a suction inlet of a suction inlet body and then introduces the auctioned airflow into a dust collector so as to collect the dust,
wherein the suction inlet body is provided with a plurality of suction inlets and a plurality of suction inlet passages respectively connecting with the plurality of suction inlets, and
wherein, at least one of the plurality of suction inlet passages is provided with adjusting means for adjusting a ratio of air passage volume in a center portion of the respectively connected suction inlet to air passage ratio in both side portions thereof,
wherein the adjusting means is so formed as to change a thickness-direction spatial dimension of a portion of the at least one suction inlet passage leading from the center portion of the respectively connected suction inlet inward, and
wherein thickness-direction spatial dimensions of portions of the at least one suction inlet passage leading from the both side portions of the respectively connected suction inlet inward is greater than the thickness direction spatial dimension of the portion of the at least one suction inlet passage leading from the center portion of the respectively connected suction inlet inward.
2. The electric vacuum cleaner according to claim 1 ,
wherein a suction inlet switch device is provided which switches among the plurality of suction inlets for use.
3.-6. (canceled)
7. The electric vacuum cleaner according to claim 1 ,
wherein a partition wall as a partition between the at least one suction inlet passage provided with the adjusting means and another of the plurality of suction inlet passages which is adjacent thereto and connecting with another respectively connected suction inlet has on a side thereof facing the another respectively connected suction inlet, a partition wall surface that is rectilinear in a right/left direction thereof.
8. The electric vacuum cleaner according to claim 2 ,
wherein a partition wall as a partition between the at least one suction inlet passage provided with the adjusting means and another of the plurality of suction inlet passages which is adjacent thereto and connecting with another respectively connected suction inlet has, on a side thereof facing the another respectively connected suction inlet, a partition wall surface that is rectilinear in a right/left direction thereof.
9.-11. (canceled)
12. The electric vacuum cleaner according to claim 1 wherein, for each of the portions of the at least one suction inlet passage leading from the both side portions of the respectively connected suction inlet inward and the portion of the at least one suction inlet passage leading from the center portion of the respectively connected suction inlet inward, the thickness-direction spatial dimension as measured at an inward side is greater than or equal to the thickness-direction dimension passage as measured at a suction inlet side.
13. The electric vacuum cleaner according to claim 2 wherein, for each of the portions of the at least one suction inlet passage leading from the both side portions of the respectively connected suction inlet inward and the portion of the at least one suction inlet passage leading from the center portion of the respectively connected suction inlet inward, the thickness-direction spatial dimension as measured at an inward side is greater than or equal to the thickness-direction dimension passage as measured at a suction inlet side.
14. The electric vacuum cleaner according to claim 7 wherein, for each of the portions of the at least one suction inlet passage leading from the both side portions of the respectively connected suction inlet inward and the portion of the at least one suction inlet passage leading from the center portion of the respectively connected suction inlet inward, the thickness-direction spatial dimension as measured at an inward side is greater than or equal to the thickness-direction dimension passage as measured at a suction inlet side.
15. The electric vacuum cleaner according to claim 8 wherein, for each of the portions of the at least one suction inlet passage leading from the both side portions of the respectively connected suction inlet inward and the portion of the at least one suction inlet passage leading from the center portion of the respectively connected suction inlet inward, the thickness-direction spatial dimension as measured at an inward side is greater than or equal to the thickness-direction dimension passage as measured at a suction inlet side.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002340842A JP2004173759A (en) | 2002-11-25 | 2002-11-25 | Vacuum cleaner |
JP2002-340842 | 2002-11-25 | ||
PCT/JP2003/014948 WO2004047604A1 (en) | 2002-11-25 | 2003-11-21 | Electric cleaner |
Publications (1)
Publication Number | Publication Date |
---|---|
US20060130267A1 true US20060130267A1 (en) | 2006-06-22 |
Family
ID=32375830
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/535,781 Abandoned US20060130267A1 (en) | 2002-11-25 | 2003-11-21 | Electric cleaner |
Country Status (3)
Country | Link |
---|---|
US (1) | US20060130267A1 (en) |
JP (1) | JP2004173759A (en) |
WO (1) | WO2004047604A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050039296A1 (en) * | 2001-11-12 | 2005-02-24 | Hiroshi Yoshimura | Suction cleaner |
US20050060839A1 (en) * | 2001-11-09 | 2005-03-24 | Noboru Nishinaka | Suction cleaner |
US20050210625A1 (en) * | 2004-03-29 | 2005-09-29 | Joung Myoung-Sun | Vacuum cleaner having a controllable cleaning brush |
US20050217069A1 (en) * | 2004-04-02 | 2005-10-06 | Joung Myoung-Sun | Vacuum cleaner with controllable brush |
US8978207B2 (en) | 2013-03-15 | 2015-03-17 | Electrolux Home Care Products, Inc. | Vacuum cleaner edge cleaning system |
CN113440045A (en) * | 2020-03-26 | 2021-09-28 | 莱克电气股份有限公司 | Scrubbing brush and dust catcher of adjustable removal resistance |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006051740A1 (en) * | 2004-11-10 | 2006-05-18 | Matsushita Electric Industrial Co., Ltd. | Air conditioner having indoor unit with automatic air filter cleaning function |
JP7390620B2 (en) * | 2020-06-17 | 2023-12-04 | パナソニックIpマネジメント株式会社 | Suction device that can be attached to a suction type cleaning machine |
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US1038517A (en) * | 1910-09-20 | 1912-09-17 | Samuel C Ball | Tool for vacuum-cleaners. |
US1726592A (en) * | 1926-02-05 | 1929-09-03 | Abraham N Spanel | Vacuum cleaner |
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Publication number | Priority date | Publication date | Assignee | Title |
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US20050060839A1 (en) * | 2001-11-09 | 2005-03-24 | Noboru Nishinaka | Suction cleaner |
US20050039296A1 (en) * | 2001-11-12 | 2005-02-24 | Hiroshi Yoshimura | Suction cleaner |
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US20050210625A1 (en) * | 2004-03-29 | 2005-09-29 | Joung Myoung-Sun | Vacuum cleaner having a controllable cleaning brush |
US20050217069A1 (en) * | 2004-04-02 | 2005-10-06 | Joung Myoung-Sun | Vacuum cleaner with controllable brush |
US8978207B2 (en) | 2013-03-15 | 2015-03-17 | Electrolux Home Care Products, Inc. | Vacuum cleaner edge cleaning system |
CN113440045A (en) * | 2020-03-26 | 2021-09-28 | 莱克电气股份有限公司 | Scrubbing brush and dust catcher of adjustable removal resistance |
Also Published As
Publication number | Publication date |
---|---|
WO2004047604A1 (en) | 2004-06-10 |
JP2004173759A (en) | 2004-06-24 |
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AS | Assignment |
Owner name: SHARP KABUSHIKI KAISHA, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:OKA, YASUHIRO;YOSHIMURA, HIROSHI;HAMADA, SUSUMU;REEL/FRAME:016120/0645 Effective date: 20050412 |
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STCB | Information on status: application discontinuation |
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