JP6703386B2 - Vacuum cleaner - Google Patents

Description

The embodiment of the present invention relates to an electric vacuum cleaner that removes dust collected by a secondary filter located above a primary filter by a dust removing mechanism and drops the dust in a dust storage portion on the downstream side of the primary filter to collect the dust.

2. Description of the Related Art Conventionally, there is known an electric vacuum cleaner provided with a dust collecting device for centrifugally separating (cyclone separating) dust detachably attached to a main body case. This dust collecting device includes a dust collecting cup that is a bottomed cylindrical main body, a primary filter coaxially arranged in the dust collecting cup, and a pleated filter located above the primary filter. Secondary filter, a partition wall interposed between the primary filter and the secondary filter, a dust removal mechanism for removing fine dust collected in the pleated filter and dropping it from the upper communication hole of the partition wall, and the primary filter It is provided with a dust accommodating portion located on the central axis side and accumulating fine dust dropped by the dust removing mechanism.

In the case of such a configuration, it is required to reliably collect the fine dust dropped from the upper communication hole in the dust container, for example, in the vicinity of the downstream side of the primary filter without falling into the dust container. It is necessary to prevent the accumulated fine dust from being re-adhered to the secondary filter by being blown up by the suction air passing through the primary filter.

JP, 2013-188381, A JP, 2013-150932, A JP, 2013-111333, A

The problem to be solved by the present invention is to provide an electric vacuum cleaner capable of reliably collecting the dust dropped from the upper communication hole in the dust storage portion and suppressing reattachment to the secondary filter.

The electric vacuum cleaner according to the embodiment includes a cleaner body that houses the electric blower, and a dust collecting unit that collects dust contained in the air sucked by the electric blower. The dust collecting unit includes a dust collecting unit main body into which air flows, a primary filter, a secondary filter, an upper partition, a dust removing mechanism, a lower partition, and a dust container. The primary filter is arranged in a cylindrical shape in the dust collecting body, and collects dust contained in the air passing from the outer peripheral side to the inner peripheral side. The secondary filter is located above the primary filter and collects dust contained in the air that has passed through the primary filter. The upper partition wall has an upper communication hole that communicates with the downstream side of the primary filter, and is interposed between the primary filter and the secondary filter. The dust removing mechanism drops the dust collected by the secondary filter and sweeps the dust that has fallen onto the upper partition wall into the upper communication hole. The lower partition wall has a lower communication hole, a first inclined surface, and a second inclined surface. The lower communication hole is located below the primary filter and communicates with the downstream side of the primary filter. The first inclined surface inclines downward from the primary filter side. The second inclined surface is inclined downward from the first inclined surface side to the lower communication hole side at an angle larger than that of the first inclined surface . The dust container communicates with the lower communication hole to store the dust removed from the secondary filter by the dust removing mechanism. The upper communication hole and the lower communication hole are directly opposed to each other in the vertical direction. The area where the upper communication hole is projected downward is located inward of the area surrounded by the upper end side of the second inclined surface.

It is a center sectional view showing the dust collection part of the vacuum cleaner of a 1st embodiment. It is an exploded perspective view of the dust collecting part same as the above. (a) is a perspective view showing the secondary filter and the dust removing mechanism of the dust collecting section from above, and (b) is a perspective view showing the secondary filter and dust removing mechanism from below. It is a perspective view which shows an electric vacuum cleaner same as the above. It is a center sectional view showing a part of dust collection part of the vacuum cleaner of a 2nd embodiment. It is a center sectional view showing a part of dust collecting part of an electric vacuum cleaner of a 3rd embodiment. It is a center sectional view showing a part of state where the dust collection part of the vacuum cleaner of a 4th embodiment was attached to the cleaner body.

The configuration of the first embodiment will be described below with reference to FIGS. 1 to 4.

In FIG. 4, reference numeral 11 denotes a so-called canister-type electric vacuum cleaner. In the electric vacuum cleaner 11, a pipe section 12 which is a suction air duct body (air duct forming body) and the pipe section 12 are detachably connected. The main body 13 of the cleaner.

The pipe portion 12 is provided on the connection pipe portion 15 connected to the cleaner body 13, the flexible hose body 16 communicating with the tip end side of the connection pipe portion 15, and the tip end side of the hose body 16. A hand operation unit 17, an extension pipe 18 detachably connected to the tip side of the hand operation unit 17, and a floor brush 19 as a suction port body detachably connected to the tip side of the extension pipe 18 and the like. It has and.

A grip portion 21 is provided on the hand-side operation portion 17 so as to project toward the hose body 16, and a plurality of operation setting buttons 22 are provided on the grip portion 21.

Further, the cleaner body 13 is provided with a body case 25 having large-diameter traveling wheels 23 on both sides and a swivel wheel (not shown) at the bottom, and a dust collecting device as a dust collecting unit is provided on the top of the body case 25. 26 is removable. The cleaner body 13 is configured to be able to travel (move) on the floor surface that is the surface to be cleaned by the traveling wheels 23 and the turning wheels. Hereinafter, the traveling direction of the cleaner body 13 will be referred to as the front-rear direction, and the horizontal direction orthogonal to the front-rear direction will be referred to as the left-right direction.

The main body case 25 is made of, for example, a synthetic resin, and integrally has a main body portion 31 and a projecting receiving portion 32 provided on the lower side of the front portion of the main body portion 31. Inside the main body case 25, an L-shaped air passage portion (not shown) is arranged across the main body portion 31 and the protrusion receiving portion 32.

The main body section 31 accommodates a power supply section, an electric blower 35, and a main body control section for controlling the electric blower 35. The traveling wheels 23 are located on both sides of the main body 31. Although not shown, an intake opening that communicates with the suction side of the electric blower 35 and a communication opening that communicates with the downstream side of the air passage section are vertically opened at the front of the main body 31.

In the present embodiment, the power supply unit is a cord reel device around which the power cord 37 is wound, but may be a (secondary) battery or the like.

The operation of the electric blower 35 is controlled by the main body control unit according to the operation of the setting button 22, and is arranged so as to have an axial direction along the vertical direction, for example, the upper side is the suction side, and the lower side is the exhaust side. Has become.

The projection receiving portion 32 is a portion that supports the lower portion on the front side of the dust collector 26, is formed in a bottomed cylindrical shape in a plan view, and protrudes from the lower front portion of the main body portion 31 inclining upward toward the front. ing. Further, on the front surface of the protrusion receiving portion 32, a main body suction port 39 is formed which is connected to the upstream of the air passage portion and to which the connecting pipe portion 15 of the pipe portion 12 is connected.

The air passage portion is a portion that communicates with the suction side of the electric blower 35 through the dust collecting device 26 by communicating with the upstream side of the dust collecting device 26 attached to the main body case 25. A certain front end side is a main body suction port, and a downstream upper end side is a communication opening.

As shown in FIGS. 1 to 4, the dust collecting device 26 is a dust separating device that separates and collects dust from the air sucked by the drive of the electric blower 35, and a cup portion 41 as a dust collecting body, An inner cylinder part 42 as a separating main body part housed inside the cup part 41, a filter part 43 detachably attached to the cup part 41, and a cover which is removable from the cup part 41 and covers the filter part 43. And a section 44. In the following description, in the dust collector 26, the up-down direction means one end side and the other end side in the axial direction of the dust collector 26 (the upper side and the other end side, which are one end side of the one-dot chain line L in FIG. 1). Side). That is, the vertical direction of the dust collector 26 is based on the vertical direction of the dust collector 26 alone, and is not necessarily the vertical direction of the dust collector 26 when mounted on the main body case 25. It may not match.

The cup portion 41 includes, for example, a cup portion main body 46 as a main body formed in a cylindrical shape from a translucent synthetic resin and the like, and a bottom as a circular lid body capable of opening and closing the lower end portion of the cup portion main body 46. It has a bottomed cylindrical shape with a lid 47, and is driven by an electric blower 35 so that dust-containing air is sucked into the inside and flows in.

The cup portion main body 46 has a suction port 51 opened at the rear portion facing the main body portion 31 of the main body case 25. A filter receiving portion 52 for receiving the filter portion 43 is integrally provided on the upper portion of the cup portion main body 46. Further, the lower end portion of the cup portion main body 46 serves as a discarding opening portion 53 for discarding dust inside the cup portion 41 which is opened and closed by the bottom lid 47. A bottom lid locking portion 54 as a lid locking portion for locking the bottom lid 47 is attached to the front portion of the lower end portion of the cup portion main body 46.

The suction port 51 communicates with the air passage part and the main body suction port 39 by communicating with the communication opening with the dust collector 26 attached to the main body case 25, and the tangential direction in the cup part main body 46. It is formed so as to guide dust-containing air along.

The filter receiving portion 52 is an enlarged diameter portion 56 that is inclined upwardly with respect to the upper end portion of the cup body 46, and a cylindrical outer wall portion 57 that is continuous with the upper end portion of the enlarged diameter portion 56, And a flange portion 58 protruding in a flange shape toward the central axis. The flange portion 58 supports the outer peripheral side of the filter portion 43 from below, and extends downward from the outer edge portion toward the central axis side, for example, in a direction orthogonal to the central axis of the cup portion 41 (dust collecting device 26). Inclination is less than 45° with respect to, and a circular fitting opening 59 is opened in the substantially central portion. Further, a holding portion 60 that holds the upper end portion of the filter portion 43 is provided at the lower portion of the flange portion 58 so as to project at the position of the edge portion of the fitting opening portion 59.

The bottom lid locking portion 54 includes a button portion 54a protruding to one side and a locking claw portion (not shown) that locks the bottom lid 47, and the bottom lid 47 by the locking claw portion is operated by operating the button portion 54a. The lock can be released.

The bottom lid 47 is rotatably supported on the lower end side of the cup body 46, and is configured to airtightly close the waste opening 53 while being locked by the bottom lid locking portion 54. ..

The inner cylinder portion 42 has a substantially cylindrical shape and is arranged coaxially with the cup portion 41 (cup portion main body 46). The inner tubular portion 42 includes a cylindrical filter tubular portion 63, a lower partition wall 64 continuous to the lower end portion of the filter tubular portion 63, a dust storage portion 65 continuous to the lower end portion of the lower partition wall 64, and the dust. It is integrally provided with a shade portion 66 located around the accommodation portion 65.

The filter cylinder 63 includes a cylinder main body 71 formed in a cylindrical shape, a plurality of ventilation openings 72 formed in the cylinder main body 71 in the circumferential direction, and a mesh-shaped primary member arranged so as to cover the ventilation openings 72. The filter 73 is integrally provided. Then, between the outer peripheral side of the filter cylinder portion 63 and the cup portion 41 (cup portion main body 46), the dust-containing air flowing into the cup portion 41 from the suction port 51 is swirled to generate relatively large dust. A swirling air passage 74 that forms a centrifugal separation unit that centrifugally separates coarse dust is formed.

On the outer peripheral side of the upper end portion of the tubular portion main body 71, a fixed portion 76 that is fixed to the holding portion 60 by, for example, screwing or screwing is provided in a protruding manner. Further, the cylindrical main body 71 is provided with a projecting portion 77 projecting toward the central axis side on the inner peripheral side of the upper end portion, and a circular upper communication hole 78 is provided at a substantially central portion of the projecting portion 77. Is opened. The projecting portion 77 is fitted into the fitting opening 59 at the lower end of the flange portion 58 by fixing the fixed portion 76 to the holding portion 60, and constitutes the upper partition wall 79 together with the flange portion 58. ..

Further, the protruding portion 77 has an upper inclined portion 81 whose upper portion continuously inclines with respect to the flange portion 58 continuously, and a lower inclined portion whose lower portion inclines in a direction intersecting with the upper inclined portion 81. It is part 82.

The upper inclined portion 81 supports the center side of the filter portion 43 from below, and extends downward from the outer edge portion continuous with the flange portion 58 toward the central axis side, for example, the cup portion 41 (dust collecting device 26). The angle is less than 45° with respect to the direction orthogonal to the central axis.

The lower inclined portion 82 is a portion where the air that has passed through the primary filter 73 is rectified to the upper communication hole 78, and goes upward from the outer edge portion toward the central axis, for example, the cup portion 41 (dust collecting device 26). The angle is less than 45° with respect to the direction orthogonal to the central axis of.

The upper communication hole 78 communicates with the downstream side of the primary filter 73 and guides air to the filter portion 43, and in the present embodiment, is coaxial with the central axis of the cup portion 41 (dust collecting device 26). Has been formed.

The upper partition wall 79 is located above the primary filter 73 and below the filter portion 43.

The ventilation openings 72 are provided so as to radially pass through the outer peripheral surface of the tubular portion main body 71, and are spaced from each other, for example, at substantially equal angles (approximately equal intervals) in the circumferential direction of the tubular portion main body 71.

The primary filter 73 may be formed in, for example, a cylindrical shape to cover the entire plurality of ventilation openings 72, or may cover each ventilation opening 72, but as a whole, the outer peripheral surface or the inner circumference of the tubular portion main body 71. They are arranged in a cylindrical shape along the surface. And, this primary filter 73, when the dust-containing air swirling in the swirling air passage 74 passes through the ventilation opening 72, that is, when passing from the outer peripheral side to the inner peripheral side of the primary filter 73, part of the dust Is collected by filtration.

The lower partition wall 64 integrally includes a first inclined portion 85 located at the upper end portion and a second inclined portion 86 continuous to the lower end portion of the first inclined portion 85, and contracts from the upper end side to the lower end side as a whole. It has a substantially cylindrical shape with a diameter. A lower communication hole 87 communicating with the dust container 65 is opened at the lower end of the second inclined portion 86 of the lower partition wall 64.

In the first inclined portion 85, an upper end portion that is continuous with a lower end portion of the filter cylinder portion 63 (cylindrical body 71) is formed to have a diameter dimension substantially equal to that of the filter cylindrical portion 63 (cylindrical body 71). From the bottom to the lower end. The upper surface of the first inclined portion 85 is a first inclined surface 85a that is close to the primary filter 73.

The second slanted portion 86 is gradually reduced in diameter from the upper end portion which is continuous with the lower end portion of the first slanted portion 85 to the lower end portion. The upper surface of the second inclined portion 86 is a second inclined surface 86a which is an inclined surface separated from the primary filter 73. The second inclined surface 86a is, for example, more inclined than the first inclined surface 85a with respect to the direction orthogonal to the central axis of the cup portion 41 (dust collecting device 26), and is set to, for example, 45° or more. ing.

The lower communication hole 87 is located at the upper end of the dust container 65 and is a part for dropping the fine dust D into the dust container 65, and is formed in a circular shape. That is, the lower communication hole 87 is located below the primary filter 73 and communicates with the downstream side of the primary filter 73. In other words, the lower communication hole 87 connects the downstream side of the primary filter 73 and the dust container 65. The lower communication hole 87 is arranged coaxially with the upper communication hole 78 in the present embodiment.

Here, the size relationship of the diameters of the lower communication hole 87, the upper communication hole 78, and the upper end portion (the primary filter 73) of the second inclined surface 86a of the lower partition wall 64 at the respective positions is as follows. Is smaller than the diameter B at the position of the upper end of the second inclined surface 86a (the primary filter 73) and larger than the diameter C of the lower communication hole 87 at the position of the lower end of the second inclined surface 86a. (C<A<B). Therefore, the region projected downward (vertically downward) of the upper communication hole 78 is inward from the upper end side of the second inclined surface 86a, that is, in the present embodiment, inside the region surrounded by the upper end of the second inclined surface 86a, that is, It is located on the central axis side of the dust collector 26 (cup portion 41). In other words, the plane P1 including the position of the upper end of the second inclined surface 86a and orthogonal to the axial direction of the dust collecting device 26 (cup portion 41) and the cylinder in which the inner edge portion of the upper communication hole 78 extends vertically downward are formed. The intersecting virtual circles are located concentrically inside the virtual circle surrounded by the upper end of the second inclined surface 86a on this plane P1. Therefore, the fine dust D that has fallen from the upper communication hole 78 hardly falls to the first inclined surface 85a, but almost entirely falls to the second inclined surface 86a or the lower communication hole 87.

The dust accommodating portion 65 is a portion for accumulating the fine dust D, which is a relatively small amount of dust collected by the filter portion 43, and the lower end of the dust accommodating portion 65 communicates with the waste opening portion 53 with the bottom cover 47 opening the waste opening portion 53. At the same time, the lower end is airtightly closed with the bottom cover 47 closing the waste opening 53. The dust container 65 has a vertical dimension larger than the diameter C of the lower communication hole 87, that is, has a vertically long shape. Furthermore, the dust container 65 is located on the downstream side of the primary filter 73, and below the primary filter 73, on the center side (inward) with respect to the circular region in which the primary filter 73 is projected downward. ing.

The shade portion 66 compresses the coarse dust that has been centrifugally separated in the swirling air passage 74 and accumulated in the cup portion 41, and is formed in a substantially closed cylindrical shape that opens downward. The shade portion 66 has a larger diameter dimension than the filter cylinder portion 63. A plurality of ventilation openings 91 are opened in the circumferential direction at the upper part of the shade portion 66, and a compression filter 92, which is a net-shaped (mesh-shaped) ventilation filter, is arranged to cover the ventilation openings 91. ..

The filter portion 43 includes a substantially annular holding frame portion 95, a secondary filter 96 that is a pleat filter held by the holding frame portion 95, and a dust removing mechanism 97 attached to the holding frame portion 95. .. Therefore, the upper partition wall 79 is interposed between the secondary filter 96 and the primary filter 73.

The holding frame portion 95 is a ring-shaped holding frame portion main body 95a that surrounds the periphery of the secondary filter 96, and a plurality of ribs that are raised relative to the holding frame portion main body 95a and hold the ridge lines of the secondary filter 96, respectively. The ridge line holding portion 95b, a projection portion 95c protruding from the upper portion of the ridge line holding portion 95b, and a cylindrical central shaft portion 95d coaxially with the holding frame body 95a are integrally provided. ..

The ridge line holding portions 95b are provided separately from each other so as to be parallel to the holding frame main body 95a in a predetermined diametrical direction.

The protrusions 95c are arranged on a generally identical circumference centered on the central axis (central axis 95d) of the holding frame 95 as a whole.

The secondary filter 96 is, for example, a surface dust collection filter formed in a sheet shape by a member such as tetrafluoroethylene resin (polytetrafluoroethylene, PTFE), and was not collected by the primary filter 73 (could not be collected). Fine dust D smaller than dust can be collected. The secondary filter 96 is formed by alternately repeating mountain folds and valley folds so as to include projecting portions 96a that alternately project vertically, and the ridge lines on the upper side of the projecting portions 96a are respectively held by the ridge line holding portions 95b. ing.

The dust removing mechanism 97 guides the dust removing portion 101 for removing the fine dust D from the secondary filter 96, the fine dust D dropped by the dust removing portion 101 to the upper communication hole 78, and drops from the upper communication hole 78. And a sweeping section 102 for causing the sweeping.

The dust removing part 101 is attached to the upper part of the secondary filter 96, and rotates (rotates) in one direction with respect to the central shaft part 95d of the holding frame part 95 and in the other direction opposite to this one direction. It is rotatably supported, that is, rotatably rotatable. The dust remover 101 includes, for example, a pair of dust removers 101a extending radially along the radial direction of the secondary filter 96, and these dust removers 101a are rotated to rotate the ridge line holding portions 95b of the filter portion 43. The protrusions 95c are sequentially repelled so that the secondary filter 96 is vibrated to remove the fine dust D collected by the secondary filter 96.

The sweeping section 102 is attached to the lower part of the secondary filter 96, and is in one direction integrally with the dust removing section 101 with respect to the central axis section 95d of the holding frame section 95, and in a direction opposite to this one direction. It is pivotally supported so as to be rotatable (rotatable) in each direction, that is, to be rotatable in a reverse direction. That is, the sweeping section 102 is adapted to rotate in conjunction with the dust removing section 101. The sweep-out portion 102 is provided with, for example, a pair of arm portions 102a extending radially along the radial direction of the secondary filter 96, and is a scraper formed of a member having elasticity under the arm portions 102a. The blades 102b are attached so as to project therefrom. Then, the sweeping unit 102 is rotated while the blades 102b are rotated while slidingly contacting the upper partition wall 79, so that the fine dust particles removed from the secondary filter 96 by the dust removing unit 101 and dropped on the upper partition wall 79. D is swept out from the upper communication hole 78 into the dust container 65.

The cover portion 44 is an operation knob that is a disk-shaped operated portion that is a rotary knob that can be inverted and rotated at an upper portion that is an uppermost portion of the cleaner body 13 in a state where the dust collector 26 is attached to the body case 25. 104 is exposed and attached to the outside. Further, an exhaust opening 105 serving as an exhaust port of the dust collector 26 is formed at the rear of the cover 44. Further, on the upper rear side of the cover portion 44, the dust collecting device 26 is movably arranged on the main body case 25 as a detaching lever which is a detachable operation portion capable of being locked and fixed. There is.

The operation knob 104 is for integrally rotating the dust removing unit 101 and the sweeping unit 102 by a user gripping the outer peripheral portion and rotating the same, and the filter unit 43 is attached to the cover unit 44. In this state, the dust removing unit 101 is connected, and the dust removing unit 101 and the sweeping unit 102 are integrally rotated.

The removal lever 106 is attached so as to be rotatable in the vertical direction, for example, and the lower end section defines the upper edge of the exhaust opening 105. Further, the removal lever 106 is provided with locking protrusions (not shown) that are inserted and locked into the locking recesses of the guides of the main body case 25 with the dust collector 26 attached to the main body case 25. ing. The detaching lever 106 is biased in a downward rotating direction by a biasing body (not shown) such as a coil spring or a torsion spring, and the locking protrusions are moved to the locking recesses. It is configured to maintain the insertion locked state.

Next, the operation of the first embodiment will be described.

When cleaning, first, the dust collector 26 is attached to the main body case 25, and the connection pipe portion 15 (pipe portion 12) is connected to the main body suction port 39. If the dust collector 26 is attached to the main body case 25 in advance, or if the connection pipe portion 15 (pipe portion 12) is connected to the main body suction port 39, these operations are unnecessary.

When the dust collector 26 is attached to the main body case 25, the locking protrusion is inserted and locked in the locking recess to fix the dust collector 26 to the main body case 25, and the exhaust opening 105 and the intake opening are airtight. While being connected, the suction port 51 and the communication opening are airtightly connected. That is, the upstream side of the dust collector 26 is air-tightly connected to the air passage portion, and the downstream side of the dust collector 26 is air-tightly connected to the suction side of the electric blower 35.

Further, when the connection pipe portion 15 is connected to the main body suction port 39, each part of the pipe portion 12, that is, each of the hose body 16, the extension pipe 18, and the floor brush 19, causes the suction side of the electric blower 35 via the dust collector 26. Communicate with.

When the power cord 37 is connected to an outlet such as a wall surface (not shown) so that power can be supplied from the power source, the grip portion 21 is gripped, and the desired setting button 22 is operated. In the operation mode, the main body control unit drives the electric blower 35. The negative pressure generated by the drive of the electric blower 35 sequentially acts on the hose body 16, the extension pipe 18 and the floor brush 19 of the pipe portion 12 via the dust collector 26, and removes dust from the floor brush 19 together with air. It becomes possible to inhale. That is, by driving the electric blower 35, a flow of air is formed from the pipe portion 12 through the dust collector 26 to the suction side of the electric blower 35.

The user puts the floor brush 19 on the floor surface and runs it back and forth at the place to be cleaned to suck in the dust on the floor surface. When moving the part to be cleaned on the floor, the hose body 16 is pulled to move the cleaner body 13 on the floor.

The dust-containing air sucked from the floor brush 19 passes through the extension pipe 18, the hose body 16, the main body suction port 39, the suction passage 51 via the air passage portion and the communication opening portion, that is, the dust collecting device 26 from the pipe portion 12 side. It is sucked into the inside (inside the cup portion 41) and swung in the swirling air passage 74 in the cup portion main body 46. As a result, relatively large dust such as cotton dust, that is, coarse dust is centrifugally separated from the air, and the coarse dust falls along the inner surface of the cup body 46 by its own weight. Then, the dropped coarse dust is carried into the shade portion 66 by the air flow, and the air passes through the compression filter 92 to be pressed against the compression filter 92 and compressed. The air that has passed through the compression filter 92 repeatedly passes through the outer peripheral side of the shade portion 66 so as to circulate into the shade portion 66, so that coarse dust is effectively compressed in the shade portion 66.

The air from which the coarse dust has been removed passes through the primary filter 73 from the outer peripheral side to the inner peripheral side in an upwardly inclined manner, and then passes through the upper communication hole 78 while being rectified by the lower inclined portion 82, By passing through the secondary filter 96, fine dust, that is, fine dust D, is collected by the secondary filter 96.

After that, the air that has passed through the secondary filter 96 to the downstream side is sucked into the electric blower 35 through the exhaust opening 105 and the intake opening. Then, after cooling the electric blower 35, it becomes exhaust air and is exhausted from the electric blower 35, and is exhausted to the outside of the cleaner main body 13 (main body case 25) through an exhaust hole (not shown) provided in the main body case 25. It

When the cleaning is completed, the user operates the setting button 22 so that the main body control unit stops the electric blower 35.

When a certain amount or more of dust is collected in the dust collecting device 26, the dust collecting device 26 is removed from the main body case 25 and the dust is discarded. At the time of this disposal, first, the user releases the engagement between the locking protrusions and the locking recesses of the guides by rotating the removal lever 106 upward, and then the dust collection. The device 26 is lifted up and removed from the body case 25. As shown in FIG. 1, the dust collector 26 removed from the main body case 25 is in a state where its axial direction is along the vertical vertical direction due to its own weight. After that, the user grips the operation knob 104 as necessary and rotates it so as to invert in the left-right direction (clockwise direction and counterclockwise direction) alternately, and the dust that is connected to the operation knob 104 is rotated. The dropping unit 101 is integrally rotated together with the sweeping unit 102 by reversing.

The dust removing unit 101 causes each dust removing member 101a to abut on the protrusions 95c of the filter unit 43 by rotation, and repulsing the abutting protrusions 95c to the side in order to prevent the secondary filter 96 from vibrating. The fine dust D that has been applied and collected by the secondary filter 96 is dropped and removed from the secondary filter 96. A part of the fine dust D dropped and removed from the secondary filter 96 is directly dropped and collected in the dust container 65. The remaining part of the fine dust D dropped and removed from the secondary filter 96 collects on the upper partition wall 79.

The fine dust D collected on the upper partition wall 79 is brought into contact with the upper partition wall 79 by the blades 102b and 102b of the sweeping section 102 rotating together with the dust removing section 101 slidingly contacting the upper partition wall 79 while being flexibly deformed. It is guided from above to the upper communication hole 78, swept out from this upper communication hole 78 and falls. At this time, since the area where the upper communication hole 78 is projected downward is located inward of the area surrounded by the upper end of the second inclined surface 86a, the fine dust D dropped from the upper communication hole 78 is It is directly dropped from the lower communication hole 87 into the dust storage portion 65 and stored therein, or is dropped onto the second inclined surface 86a and is guided downward by its own weight along the inclination of the second inclined surface 86a. It is dropped from the communication hole 87 to the dust storage portion 65 and stored therein. That is, the fine dust D does not collect on the lower partition wall 64 at a position near the primary filter 73 (for example, on the first inclined surface 85a of the first inclined portion 85).

Next, the dust collector 26 is carried on a dust box or the like for discarding dust, and the button portion 54a of the bottom lid locking portion 54 is pushed in, whereby the locking of the bottom lid 47 by the locking claw portion is released, and the bottom lid 47 is released. The weight 47 causes the waste opening 53 to open by rotating downward due to its own weight. As a result, the coarse dust accumulated on the bottom lid 47, the coarse dust retained in the shade portion 66, and the fine dust D accumulated in the dust accommodating portion 65 drop by themselves due to their own weight and are discarded. To be done.

The dust collector 26, which has discarded the collected dust, can be mounted on the main body case 25 again and used.

As described above, according to the first embodiment, the region where the upper communication hole 78 is projected downward is located inward of the region surrounded by the upper end of the second inclined surface 86a. The fine dust D dropped from the upper communication hole 78 can be reliably collected in the dust container 65 to prevent re-adhesion to the secondary filter 96. In the first embodiment, the dust collector 26 is, for example, the main body. It is also assumed that it is attached to the case 25 so that the axial direction is inclined with respect to the vertical up and down direction, and in this state, the operating knob 104 is operated to remove the fine dust D from the secondary filter 96 by the dust removing mechanism 97. To be done. In this case, as in the second embodiment shown in FIG. 5, in the vertical up and down direction with the dust collector 26 attached to the main body case 25, as in the first embodiment, the upper communication hole is formed. The area in which 78 is projected vertically downward is positioned inward of the area surrounded by the upper end of the second inclined surface 86a. In other words, a plane P2 that includes the lowermost position of the upper end portion of the second inclined surface 86a, that is, the portion that is continuous with the first inclined surface 85a and that is orthogonal to the axial direction of the dust collecting device 26 (cup portion 41). The imaginary circle intersecting with the cylinder extending the inner edge of the upper communication hole 78 vertically downward is positioned concentrically inside the imaginary circle surrounded by the second inclined surface 86a on the plane P2. As a result, with the dust collector 26 still attached to the main body case 25, the operation knob 104 is operated to remove the fine dust D collected and attached to the secondary filter 96 by the dust removing mechanism 97. When the dust D is removed from the upper communication hole 78 and dropped from the upper communication hole 78, the fine dust D hardly drops to the first inclined surface 85a and almost entirely drops to the second inclined surface 86a or the lower communication hole 87. Therefore, the same effect as that of the first embodiment can be obtained.

Further, in the first embodiment, the lower partition wall 64 may be continuously curved so that the inclination gradually increases, as in the third embodiment shown in FIG. In this case, a portion above the position where the dust collector 26 (cup portion 41) is inclined with respect to the axial direction is a first inclined surface 85a and a lower portion is a second inclined surface 86a. By setting the diameters A to C as in the case of the first embodiment, it is possible to obtain the same operational effect.

Furthermore, this third embodiment may be applied to the second embodiment.

According to at least one embodiment described above, by locating the region in which the upper communication hole 78 is projected downward, is located inward of the region surrounded by the upper end side (upper end) of the second inclined surface 86a, The fine dust D removed from the secondary filter 96 by the dust removing mechanism 97 and guided to the upper communication hole 78 and dropped is on the second inclined surface 86a inclined downward to the lower communication hole 87 or from the lower communication hole 87. Since the fine dust D directly drops into the dust containing portion 65, the fine dust D can be reliably stored in the dust containing portion 65, and even if the fine dust D slightly remains on the second inclined surface 86a, Since the inclined surface 86a is separated from the downstream side (inner peripheral portion) of the primary filter 73, it is difficult to lift to the secondary filter 96 by the air passing upward through the primary filter 73 toward the secondary filter 96 side. Therefore, reattachment to the secondary filter 96 can be suppressed.

Further, since it is not necessary to set the diameter A of the upper communication hole 78 to be smaller than necessary, the air sucked by the electric blower 35 is not excessively throttled by the upper communication hole 78, and a decrease in suction efficiency can be suppressed.

Further, by providing the second inclined surface 86a below the first inclined surface 85a which is inclined downward toward the central axis of the dust collecting device 26 (cup portion 41), the second inclined surface 86a is provided to the primary filter 73. It can be more reliably separated from the downstream side toward the central axis (inward), and even if some fine dust D remains on the second inclined surface 86a, it is finely separated by the air passing through the primary filter 73. The dust D can be prevented from being easily lifted up to the secondary filter 96, and the inclination of the second inclined surface 86a can be made larger than that in the case where the second inclined surface is inclined directly from the position on the upper end side of the first inclined surface 85a. Therefore, the fine dust D dropped from the upper communication hole 78 onto the second inclined surface 86a is hard to be left attached to the second inclined surface 86a, and is more reliably guided to the dust accommodating portion 65. Can be stored.

Further, in the first embodiment, as in the fourth embodiment shown in FIG. 7, the region in which the upper communication hole 78 is projected downward is located inward of the region surrounded by the lower communication hole 87. That is, the upper communication hole 78 and the lower communication hole 87 may be arranged coaxially, and the diameter A of the upper communication hole 78 may be smaller than the diameter C of the lower communication hole 87 (A<C<B). .. In this case, almost all of the fine dust D dropped from the upper communication hole 78 does not drop onto the lower partition wall 64 but directly drops into the dust container 65 via the lower communication hole 87. Therefore, the fine dust D dropped from the upper communication hole 78 can be reliably stored in the dust container 65, and the fine dust D is less likely to remain near the downstream side of the primary filter 73 (on the lower partition wall 64). The dust D can be prevented from being lifted by the air passing upward through the primary filter 73 toward the secondary filter 96, and the reattachment of the dust D to the secondary filter 96 can be suppressed more reliably. Moreover, in the case of the third embodiment, there is no need to provide the lower partition wall 64 with an inclined surface that is inclined downward to guide the fine dust D to the lower communication hole 87 (dust accommodating portion 65), and the configuration is further improved. In addition to being simplified, the dust accommodating portion 65 can be made longer in the vertical direction, the rising of the fine dust D inside can be more reliably suppressed, and more dust D can be accumulated in the dust accommodating portion 65. ..

Then, even if the relation of the fourth embodiment in which the region where the upper communication hole 78 is projected downward is located inward of the region surrounded by the lower communication hole 87 is applied to the second embodiment. Good.

According to at least one embodiment described above, it is possible to reliably collect the fine dust D dropped from the upper communication hole 78 in the dust storage portion 65 and suppress reattachment to the secondary filter 96.

In particular, it is preferable that the lower communication hole 87 for dropping the fine dust D into the dust storage portion 65 has a smaller diameter C in order to prevent the fine dust D from rising from inside the dust storage portion 65 and being sucked up. As the diameter C becomes smaller, it becomes more difficult for the fine dust D dropped from the upper communication hole 78 to fall into the dust storage portion 65, and the fine dust D easily accumulates near the downstream side of the primary filter 73. Due to the flow of air passing upward on the side of the secondary filter 96, reattachment to the secondary filter 96 may occur. Therefore, as in each of the above-described embodiments, the region in which the upper communication hole 78 is projected downward is set to be inward of the region surrounded by the upper end side of the second inclined surface 86a, or the upper communication hole 78 is moved downward. By making the projected area inward of the area surrounded by the lower communication holes 87, it is possible to reliably collect the dust D while suppressing the dust D from the dust accommodating portion 65 and the air D from being lifted.

Then, since it becomes difficult for the fine dust D to re-attach to the secondary filter 96, the clogging of the secondary filter 96 can be effectively suppressed, the performance can be maintained for a long time, and the performance deterioration due to the reduction of the suction efficiency can be ensured. Can be covered.

Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the scope equivalent thereto.

11 vacuum cleaner
13 Vacuum cleaner body
26 Dust collector as a dust collector
35 electric blower
41 Cup unit as the dust collecting unit body
64 lower bulkhead
65 Dust container
73 Primary filter
78 Upper communication hole
79 Upper partition
85a First inclined surface
86a second inclined plane
87 Lower communication hole
96 secondary filter
97 Dust removal mechanism

Claims (2)

A vacuum cleaner body containing an electric blower,
And a dust collecting portion for collecting dust contained in the air sucked by the electric blower,
The dust collecting section is
A dust collector body into which the air flows,
A primary filter that is arranged in a cylindrical shape in the dust collecting unit body and that collects dust contained in air passing from the outer peripheral side to the inner peripheral side,
A secondary filter that is located above the primary filter and collects dust contained in the air that has passed through the primary filter,
Having an upper communication hole that communicates with the downstream side of the primary filter, an upper partition wall interposed between the primary filter and the secondary filter,
A dust removing mechanism that removes the dust collected in the secondary filter and sweeps the dust that has fallen onto the upper partition wall to the upper communication hole,
A lower communication hole located below the primary filter and communicating with the downstream side of the primary filter, a first inclined surface inclined downward from the primary filter side, and a lower portion from the first inclined surface side. A lower partition wall having a second inclined surface inclined downwardly toward the communication hole at an angle larger than that of the first inclined surface ;
A dust accommodating portion communicating with the lower communication hole and accumulating dust removed from the secondary filter by the dust removing mechanism,
The upper communication hole and the lower communication hole are directly opposed to each other vertically,
The vacuum cleaner is characterized in that a region of the upper communication hole projected downward is located inward of a region surrounded by an upper end side of the second inclined surface. A vacuum cleaner body containing an electric blower,
And a dust collecting portion for collecting dust contained in the air sucked by the electric blower,
The dust collecting section is
A dust collector body into which the air flows,
A primary filter that is arranged in a cylindrical shape in the dust collecting unit body and that collects dust contained in air passing from the outer peripheral side to the inner peripheral side,
A secondary filter that is located above the primary filter and collects dust contained in the air that has passed through the primary filter,
Having an upper communication hole that communicates with the downstream side of the primary filter, an upper partition wall interposed between the primary filter and the secondary filter,
A dust removing mechanism that removes the dust collected in the secondary filter and guides it to the upper communication hole,
A lower communication hole that is located below the primary filter and has an inner edge portion at a position that is spaced outward from an inner edge portion of the upper communication hole and that communicates with a downstream side of the primary filter has a lower end portion, A lower partition located below the primary filter,
A dust accommodating portion communicating with the lower communication hole and accumulating dust removed from the secondary filter by the dust removing mechanism,
The vacuum cleaner is characterized in that the region of the upper communication hole projected downward is located inside the region surrounded by the lower communication hole.

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