JP5258421B2 - Electric vacuum cleaner - Google Patents

Description

  The present invention relates to a vacuum cleaner including a filtration filter disposed in a dust collection chamber.

Conventionally, this type of vacuum cleaner includes a vacuum cleaner body that houses an electric blower. A main body suction port is formed in the front portion of the cleaner body. In addition, a dust collection portion communicating between the main body suction port and the suction side of the electric blower is formed inside the cleaner body. A dust collecting cup, which is a dust collecting device, can be attached to and detached from the dust collecting portion. The dust collecting cup includes a suction port communicating with the main body suction port, a centrifugal separation unit that rotates and separates dust sucked together with air from the suction port, and an opening through which the swirling air passes through the centrifugal separation unit (For example, refer to Patent Document 1).
JP 2007-190416 A (6th page, FIG. 4)

  However, in the above vacuum cleaner, since the filtration filter is formed in a flat shape without unevenness, it is not easy to secure the area of the filtration filter, and the collected dust adheres strongly to the filtration filter and peels off. It has a problem that it is difficult.

  The present invention has been made in view of the above points, and provides a vacuum cleaner that can increase the surface area of a filtration filter without changing the size of the entire outer shell and can easily remove collected dust. With the goal.

The present invention includes an intake port for sucking air into the dust collection chamber and a projecting portion having a cross-sectional shape protruding upstream, and is disposed in the dust collection chamber at a position where air is directly blown from the intake port in an acute angle shape. A filtration filter for filtering dust by passing a part of the blown air through the protrusion, and a filter disposed separately from the filtration filter in the dust collecting chamber and allowing the air blown to the filtration filter to pass therethrough. And a filter for filtering dust .

The present invention also includes a dust collection chamber, an intake port for sucking air into the dust collection chamber, a projecting portion having a cross-sectional shape projecting upstream, and a flat flat portion. The filter is disposed in the dust collection chamber at a position where air is directly blown at an acute angle, and includes a filtration filter that filters the dust by allowing the blown air to pass through the protruding portion and the flat portion.

According to the present invention, the surface area of the filtration filter can be increased without changing the size of the entire outline of the filtration filter by providing the filtration filter with a projecting portion having a cross-sectional shape projecting upstream. by arranging the position where the air directly blown to the sharp angle from the air inlet, the air blown from the air inlet, the dust more filtered in the filtration filter from the blown air can be easily removed.

  Hereinafter, the configuration of a vacuum cleaner according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4.

  3 and 4, reference numeral 11 denotes a so-called canister-type vacuum cleaner. The vacuum cleaner 11 includes a pipe portion 12 and a vacuum cleaner body 13 to which the pipe portion 12 is detachably connected. ing.

  The pipe part 12 includes a connection pipe part 15 whose front end side is bent forward with respect to a base end side connected to the cleaner body 13, and a flexible hose body 16 communicating with the front end side of the connection pipe part 15. A hand operating part 17 provided on the front end side of the hose body 16, an extension pipe 18 detachably connected to the front end side of the hand operating part 17, and a hand attached to the front end side of the extension pipe 18 And a floor brush 19 as a suction port to be connected.

  On the hand operating portion 17, a gripping portion 21 protrudes toward the hose body 16, and the gripping portion 21 is provided with a plurality of setting buttons 22 for operation.

  The vacuum cleaner main body 13 includes a main body case 25. A partition wall 26 is provided in the main body case 25, and an electric blower 27 (FIG. 1) that houses an electric blower 27 (FIG. 1) is disposed behind the partition wall 26. A blower chamber and a not-shown cord reel chamber that houses a not-shown cord reel around which the power cord 31 is wound are partitioned, and a front side of the partition wall 26 is connected through a communication port (not shown) provided in the partition wall 26. A main body dust collecting chamber 35 communicating with the suction side of the electric blower 27 is partitioned, and a dust collecting cup 36 as a dust collecting device is detachably provided in the main body dust collecting chamber 35.

  The main body case 25 is made of, for example, a synthetic resin, and has a lower case 41 that is open on the upper side, an upper case 42 that covers the electric blower chamber and the cord reel chamber, which is an upper rear portion of the lower case 41, and the upper case 42 or A lid 43 that is pivotally supported so as to be pivotable in the vertical direction with respect to the lower case 41 and capable of opening and closing the main body dust collecting chamber 35 is provided.

  The lower case 41 is supported on both sides by a large-diameter traveling wheel 51 (only one of which is shown) for traveling the vacuum cleaner main body 13, and a rear wheel (not shown) behind the traveling wheel 51. The front wheel 53 is provided in front of the traveling wheel 51 so as to come into contact with the floor surface F only when an obstacle such as a step is overcome.

  The upper case 42 is formed with a large number of exhaust ports (not shown) communicating with the downstream side of the electric blower chamber (code reel chamber), and the power cord 31 is placed outside the main body case 25 at the sides of the exhaust ports. A cord outlet 56 for leading out is formed. A handle 57, which is a main body gripping part for gripping the cleaner main body 13, is provided on the upper part of the upper case 42 so as to be rotatable in the front-rear direction. Further, a cord winding button 58 is provided on the upper case 42 so that the power cord 31 can be wound from the cord outlet 56 by rotating the cord reel.

  The lid 43 is pivotally supported on the rear end side so as to be rotatable, and a clamp 64 for engaging and disengaging the lid 43 with respect to the lower case 41 is provided at the front end. In addition, the lid 43 is formed with an inclined portion 65 that is inclined to the upper front side in a circular shape, and the inclined portion 65 has a main body suction port 66 to which the connecting pipe portion 15 of the pipe portion 12 is connected. A rotating portion 67 having a rotator is provided so as to be rotatable in the circumferential direction. Therefore, the main body suction port 66 is formed to open toward the front upper side.

  The electric blower 27 is powered by a power supply via a power cord 31 and operates in a predetermined operation mode set by the setting button 22, and sucks dust together with air via the pipe portion 12. For example, it is a heavy object having the largest weight among the various members arranged in 25. The electric blower 27 is disposed in the electric blower chamber with the front side serving as the suction side and the rear side serving as the exhaust side, and the body case 25 as a whole is biased to the rear side. The electric blower 27 may be at least partially covered with, for example, a cover body.

  As shown in FIGS. 1 to 3, the dust collecting cup 36 collects dust contained in the suction air by centrifugation (cyclonic separation), and is a cup body that is an external case as a dust collector body. Part 71, middle case 72 as an inner case detachably provided inside cup body 71, cup lid 73 as a lid provided rotatably on cup body 71, and cup body And a filter unit 74 attached to and detached from the unit 71. In the cup body portion 71 of the dust collection cup 36, a coarse dust collection chamber 75 as a first dust collection portion as a dust collection chamber for collecting dust, a filter mounting portion 76 for attaching the filter portion 74, and A communication chamber 77 that is an air passage communicating with the coarse dust collection chamber 75 and a second dust collection portion that is a dust storage chamber as a dust collection chamber located below the filter mounting portion 76, that is, a fine dust collection chamber 78 is partitioned inside.

  The cup body portion 71 is formed of, for example, a synthetic resin, and includes a front wall portion 81, side wall portions 82 and 82 continuous on both sides of the front wall portion 81, and the front wall portion 81 and the side wall portions 82 and 82. An upper wall portion 83 that closes the upper portion, and a frame-like rear frame portion 84 that extends over the rear portions of the side wall portions 82 and 82 and the upper wall portion 83 are provided.

  The side wall portions 82 and 82 are formed such that the lower end portions are inclined substantially linearly upward to the front side, and the lower end portions together with the lower end portions of the front wall portion 81 and the rear frame portion 84 collect coarse particles. A dust disposal port 85 communicates with the chamber 75 and the fine dust collection chamber 78 and is opened and closed by a cup lid 73. Therefore, the dust disposal port 85 is formed to open toward the front lower side. Further, on the outside of one side wall portion 82, a mechanism accommodating portion 88 that accommodates an opening / closing mechanism (not shown) continuous with an opening / closing operation button 86 for opening / closing the cup lid 73 is formed in a longitudinal shape along the vertical direction. The open / close operation button 86 is exposed on the upper side.

  The upper wall portion 83 is formed in a planar shape whose front side is inclined downward, and a cylindrical intake cylinder portion 92 communicating with the coarse dust collecting chamber 75 is formed in the center portion. In addition, a grip handle 93 for gripping the dust collection cup 36 is formed on the upper wall portion 83 continuously in a loop from one side to the other side.

  The intake cylinder portion 92 is configured to be airtightly connected to the downstream side of the main body suction port 66 by closing the lid 43 while being attached to the main body dust collection chamber 35.

  The rear frame portion 84 defines the filter attachment portion 76, and is continuous in a substantially rectangular tube shape across the rear portions of the side wall portions 82 and 82 and the upper wall portion 83.

  A packing 95, which is a sealing member for hermetically closing the coarse dust collection chamber 75 and the fine dust collection chamber 78 with the cup lid 73 closed, is attached to the lower portion of the dust disposal port 85.

  Further, the middle case 72 is formed of a synthetic resin or the like, and defines a communication chamber 77 between the cup main body 71 and the middle case 72. The middle case 72 includes an inner front wall portion 96 positioned at the rear portion of the front wall portion 81 of the cup main body portion 71 and inner side wall portions 97 and 97 facing the inside of the side wall portions 82 and 82 of the cup main body portion 71. An inner upper wall portion 98 opposed to the lower portion of the upper wall portion 83 of the cup body portion 71, and the inner side wall portions 97, 97 and the inner upper wall portion 98 continuously extending over the rear ends thereof. 97 and an inner rear wall portion 99 for closing the rear portion of the inner upper wall portion 98.

  Each internal side wall 97 is formed with a communication opening 97a for communicating the coarse dust collecting chamber 75 and the communication chamber 77 (only one is shown), and each communication opening 97a has a side filter 97b as a filter. It is attached.

  The side filter 97b collects dust contained in the air when a part of the air flow sucked into the coarse dust collecting chamber 75 through the intake cylinder 92 passes to the communication chamber 77. This is a mesh filter.

  The inner upper wall portion 98 is continuous between the front side of the inner front wall portion 96 and the inner side wall portions 97, 97, and is downward with respect to the upper wall portion 83 with the middle case 72 attached in the cup body portion 71. The front upper wall portion 98a which is a separated barrier portion, and continuously between the inner side wall portions 97, 97 and the inner rear wall portion 99 so as to protrude upward from the rear portion of the front upper wall portion 98a. A rear upper wall portion 98b is formed, and a communication chamber 77 is defined between the upper wall portion 83 and the rear wall portion 98b.

  The front upper wall portion 98a faces the dust disposal port 85, and the rear side is formed to be slightly inclined upward with respect to the front side. The front upper wall 98a is formed with a front upper opening 98c as a communication opening for communicating the coarse dust collecting chamber 75 and the communication chamber 77. The front upper opening 98c has a ventilation as a filter. A filter 98d is attached.

  The ventilation filter 98d has a mesh-like shape that collects dust contained in air when a part of the air sucked into the coarse dust collecting chamber 75 through the communicating cylinder portion 92 passes to the communicating chamber 77. It is a filtration filter and is located above the dust disposal port 85.

  The rear upper wall portion 98b is formed with a cylindrical communication tube portion 98e that communicates with the lower end side, which is the downstream side of the intake tube portion 92, with the middle case 72 attached in the cup body portion 71. . The communication tube portion 98e protrudes into the communication chamber 77 so that the axial direction of the intake tube portion 92 is substantially coincident with the intake tube portion 92, and is airtightly connected to the downstream side of the intake tube portion 92. Further, the communicating cylinder portion 98e has a lower end portion located in the vicinity of the upper side of the side filter 97b. As a result, the intake cylinder portion 92 and the communication cylinder portion 98e form a cylindrical intake port 100 that is inclined at an acute angle with respect to the inner rear wall portion 99 and blows air.

  Here, the air inlet 100 circulates air containing dust sucked through the pipe portion 12 in the coarse dust collection chamber 75 as indicated by an arrow A, and the left and right widths of the upper wall portion 83 are It is formed at a substantially central position in the direction, in other words, at a substantially central position in the left-right width direction of the dust collection cup 36.

  The inner rear wall 99 includes an inclined wall 99a as a flat filter forming portion that partitions the rear portion of the coarse dust collecting chamber 75, the filter mounting portion 76, and the fine dust collecting chamber 78, and the inclined wall 99a. And a rear inclined wall portion 99b as an opening forming portion that protrudes rearward from the rear side of the lower end side and divides the fine dust collection chamber 78 and the filter mounting portion 76.

  The inclined wall portion 99a has an upper end side that is in contact with the rear edge portion of the intake cylinder portion 92 with the middle case 72 mounted in the cup body portion 71, and a lower end side that is inclined downward toward the rear side. . In other words, the inclined wall portion 99a is inclined upward on the upper side. Further, the inclined wall 99a is formed with a filter mounting opening 99c which is a rear opening as a filter filter opening for communicating the coarse dust collecting chamber 75 and the communication chamber 77 with the filter mounting portion 76. A main filter 102 as a filtration filter is attached to the filter attachment opening 99c. Further, the inclined wall portion 99a is formed with a horizontally long vent opening 99d communicating with the coarse dust collecting chamber 75 and the fine dust collecting chamber 78 below the filter mounting opening 99c. A lower filter 103 is attached to 99d.

  The main filter 102 is a metal filter formed by bending, for example, a single metal plate formed in a mesh shape by press molding or the like, and includes a protruding portion 102a at the center in the left-right width direction, and both sides of the protruding portion 102a. And a flat portion 102b.

  The protruding portion 102a protrudes forward or upstream in a roughly isosceles cross section in the coarse dust collecting chamber 75, and is a triangular in plan view as a closed portion whose upper and lower end portions protrude from the inclined wall portion 99a. Each is closed by a shape closing plate 99e. Accordingly, the projecting portion 102a is formed substantially symmetrically with left and right inclined surfaces 102c that are inclined portions that are inclined to the upstream side with respect to the surface direction of the flat portion 102b, and the surface area thereof is inclined surfaces 102c, 102c. Is the sum of For this reason, the surface area of the projecting portion 102a is enlarged as compared with the case where it is formed flat. Further, the projecting portion 102a is formed in a longitudinal shape along the vertical direction. That is, the projecting portion 102a is formed with inclined surfaces 102c and 102c along the arrow A that is the flow of air sucked into the coarse dust collecting chamber 75 from the air inlet 100. That is, these inclined surfaces 102c have a function of a rectifying unit that rectifies air sucked from the intake port 100 into the coarse dust collecting chamber 75. Further, the protruding portion 102a is set to have a left-right width dimension smaller than the left-right width dimension of the intake port 100, and the upper end side is located above the flat portion 102b so as to be in the communicating cylinder portion 98e, that is, in the intake port 100. Has been inserted. Therefore, the main filter 102 is formed in a convex shape when viewed from the front, and the upper side of the protruding portion 102a is a position where air can be directly blown from the air inlet 100 in an acute angle shape. Further, the protruding portion 102a has a tip which is a vertex protruding forward and is located on an extension of the central axis of the intake port 100. In other words, the tip of the protruding portion 102a is located at the approximate center of the dust collection cup 36 in the left-right width direction. The projecting portion 102a continuously extends in the vertical direction up to the lower end portion of the flat portion 102b. Note that the protruding portion 102a may be formed only at a position where air is directly blown from the intake port 100, which is a position above the flat portion 102b.

  The flat portion 102b is formed in a planar shape along the surface direction of the inclined wall portion 99a from the lower side of the projecting portion 102a, that is, from the portion not inserted into the intake port 100 in the left-right direction. Both sides extend to the vicinity of both sides. The flat portion 102b is formed wider than the projecting portion 102a.

  The lower filter 103 collects dust contained in the air passing through the ventilation opening 99d.

  In addition, the rear inclined wall portion 99b is further inclined rearward at the lower end side with respect to the inclined wall portion 99a. Furthermore, a plurality of openings 99f are formed in the rear inclined wall portion 99b in the left-right width direction so as to communicate the fine dust collection chamber 78 and the filter mounting portion 76. Each of these openings 99f can be opened and closed by a flap-like shutter 105 as a closing member. In addition, the opening 99f has a lower edge inclined forward and downward.

  Each shutter 105 is formed in a plate shape by a relatively lightweight member such as a synthetic resin, and its upper end is rotatably supported at a position in front of the upper end of the opening 99f, and its lower end is a free end. Yes. Further, the surface of each shutter 105 is coated with, for example, fluorine so that dust does not easily adhere. Then, each shutter 105 rotates so as to be brought into close contact with the rear inclined wall 99b by the air sucked into the fine dust collecting chamber 78 from the ventilation opening 99d by driving the electric blower 27, thereby opening the opening 99f. It can be blocked. Further, when the electric blower 27 is stopped, each shutter 105 is rotated by gravity (self-weight) and is separated from the opening 99f.

  The cup lid 73 is formed of, for example, a synthetic resin, and has a lid body 107 and a pair of ribs 108 that pivotally supports one side of the lid body 107 on one side wall 82 of the cup body 71. , 108 and a claw-like locking projection 109 which is a locking portion for locking the cup lid 73 to the opening / closing mechanism on the cup body 71 side.

  The lid main body 107 is formed with a packing receiving portion 112 as a seal member receiving portion that is pressed against a packing 95 below the dust disposal port 85 to close the gap.

  The locking projection 109 is located at the other side of the lid body 107, that is, the position opposite to the ribs 108 and 108, which is the position facing the lower part of the mechanism housing portion 88 of the cup body 71 with the cup lid 73 closed. Is formed.

  The filter unit 74 is a filter unit unit that includes a surface dust collection filter that is a fine dust filter as a filter, that is, a pleated filter 116, and a filter holding frame 117 that holds the pleated filter 116.

  The pleated filter 116 is for collecting fine dust that has not been collected by the filters 97b, 98d, and 102, and a peak portion protruding forward and a valley portion protruding backward are alternately arranged in the width direction. The pleated shape is formed in a straight line along the vertical direction. Further, a dust drop unit 119 is disposed at the rear of the pleat filter 116 as dust removing means for removing fine dust collected by the pleat filter 116 from the pleat filter 116.

  The dust drop unit 119 is driven by a motor (not shown) or the like, and is configured to apply vibration to the pleat filter 116 to remove fine dust attached to the pleat filter 116.

  The filter holding frame 117 includes a holding frame main body 117a that forms an outline that fits in the filter mounting portion 76, and a holding plate that is integrally formed inside the holding frame main body 117a and blocks the upper and lower portions of the pleat filter 116. A portion 117b, and a sloped inclined plate portion 117c integrally formed below the holding plate portion 117b and inside the holding frame main body 117a.

  An annular packing 121 is attached to the outer peripheral portion of the holding frame main body 117a as a filter portion seal member that is pressed against the inner surface of the rear frame portion 84 of the cup main body portion 71 when the filter portion 74 is attached to the filter attachment portion 76. A mounting recess 117d is formed over the entire circumference.

  The holding plate portion 117b is formed in a comb shape so as to close at least the upper and lower portions of the peak portion of the pleated filter 116 and open at least the lower portion of the valley portion.

  The inclined plate portion 117c is located below the holding plate portion 117b, that is, below the pleated filter 116, and is inclined downward toward the front. Further, in the inclined plate portion 117c, the front end portion which is the lower end portion is in contact with the lower surface of the rear inclined wall portion 99b and the lower portion of the opening portion 99f in a state where the filter portion 74 is attached to the filter attachment portion 76. For this reason, the inclined plate portion 117c is formed so as to continuously incline downward from the lower side of the pleated filter 116 to the opening portion 99f in a state where the filter portion 74 is attached to the filter attachment portion 76.

  The coarse dust collection chamber 75 is a space where coarse dust such as cotton dust is collected.

  Further, the filter mounting portion 76 is a frame-shaped space portion surrounded by the rear frame portion 84 of the cup main body portion 71, and the substantially square dust collector in which the rear end portion is closed by the filter portion 74. It is a dust collection cup exhaust port 128 which is an exhaust port.

  The communication chamber 77 is an air path in which a part of the air sucked into the coarse dust collection chamber 75 flows to the pleat filter 116 without passing through the main filter 102. And is formed in communication between the downstream side of the communication opening 97a (side filter 97b) and the front upper opening 98c (ventilation filter 98d) and the filter part 74 that is the suction side of the electric blower 27. .

  The fine dust collection chamber 78 is a space for collecting fine dust removed from the pleat filter 116 by the dust drop part 119 via the opening 99f.

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

  When cleaning, the operator first opens the lid 43 of the cleaner body 13, attaches the dust collection cup 36 to the main body dust collection chamber 35, and closes the lid 43. At this time, the worker communicates and connects the hose body 16 to the upper body suction port 66 via the connection pipe portion 15, and the extension pipe 18 and the floor brush 19 are sequentially communicated and connected to the distal end side of the hose body 16. .

  Furthermore, when the operator pulls out the power cord 31 from the vacuum cleaner body 13 and connects it to an outlet (not shown), holds the grip 21 and operates the predetermined setting button 22, the operation mode set by the setting button 22 is set. Accordingly, the electric blower 27 is driven. By driving the electric blower 27, each shutter 105 is adsorbed to the front side of the rear inclined wall 99b by the air that has passed through the ventilation opening 99d (lower filter 103), and the opening 99f is closed, thereby collecting the fine dust collection chamber. The fine dust collected in 78 is not sucked out from the opening 99f to the filter mounting portion 76 (pleat filter 116) side.

  Next, the operator grips the grip portion 21 and moves the floor brush 19 back and forth on the floor surface F, which is the surface to be cleaned, so that the dust from the front end side of the floor brush 19 is generated by the negative pressure by the electric blower 27. Inhale with air.

  The air sucked together with the dust from the floor brush 19 becomes a suction wind, and carries the dust from the main body suction port 66 to the dust collecting cup 36 through the extension pipe 18 and the hose body 16 (connection pipe portion 15).

  In this dust collection cup 36, the suction air sucked from the main body suction port 66 into the suction port 100 is sucked into the coarse dust collection chamber 75 in a substantially straight line, and is upstream of the protrusion 102a of the main filter 102. The dust that is blown directly onto the side surface and adhered to the position above the inclined surfaces 102c, 102c of the projecting portion 102a is always peeled off and dropped.

  Further, a part of the suction air blown above the protruding portion 102a flows along the inclined surfaces 102c and 102c, and removes the dust adhering to the lower side of the protruding portion 102a and the flat portion 102b. After swirling in the direction of arrow A in the collection chamber 75, that is, from the lower rear side to the upper upper side, the dust passes through the main filter 102 and flows to the filter mounting portion 76 while collecting dust. By this turning, coarse dust such as cotton dust contained in the suction air is centrifuged (cyclonic separation) by centrifugal force, and is stored in the cup lid 73 while being compressed downward of the front upper wall portion 98a.

  Further, when a part of the suction air flows through the side filter 97b and the ventilation filter 98d and flows into the communication chamber 77, dust is collected.

  The suction air that has passed through the main filter 102 or the communication chamber 77 (the side filter 97b and the ventilation filter 98d) passes through the pleated filter 116, and fine dust that has not been collected by these filters 102, 97b, and 98d. It is collected.

  Thereafter, the suction air is sucked into the electric blower 27 through the communication port of the partition wall 26, passes through the electric blower 27 and becomes exhaust air, and from the exhaust port of the main body case 25 to the outside of the cleaner main body 13. Discarded.

  When the cleaning is completed and the electric vacuum cleaner 11 is stored, the electric blower 27 is stopped. When the electric blower 27 is stopped, the shutters 105 are rotated to the front lower side by their own weight, so that the opening 99f is opened. In this state, the dust drop unit 119 operates for a predetermined time, drops and removes the fine dust collected by the pleated filter 116, leads to the opening 99f through the inclined plate part 117c, and returns to the fine dust collection chamber 78. Collect. Note that the dust drop unit 119 may be operated immediately before the electric blower 27 is activated, for example.

  Thereafter, when the operator removes the power cord 31 from the outlet and operates the cord winding button 58, the power cord 31 is wound onto the cord reel.

  In addition, when the dust collected in the dust collecting cup 36 has accumulated a predetermined amount or more, the operator opens the lid 43 of the vacuum cleaner main body 13, holds the grip handle 93, and holds the dust collecting cup 36 in the dust collecting cup 36. The cup lid 73 is opened by operating the open / close operation button 86 above the trash can with the thumb of the hand holding the grip handle 93 and removed from the chamber 35, and is collected from the dust disposal port 85 into the coarse dust collection chamber 75. The collected coarse dust and the fine dust collected in the fine dust collection chamber 78 are discarded.

  Thereafter, the operator closes the cup lid 73 with the middle case 72 attached to the cup main body 71, reattaches the dust collecting cup 36 to the main body dust collecting chamber 35 of the cleaner main body 13, and closes the lid 43.

  As described above, according to the above-described embodiment, the main filter 102 is provided with the protruding portion 102a having a cross-sectional shape protruding upstream, so that the main filter can be compared with the case where the main filter is formed flat, for example. The surface area of the main filter 102 can be expanded in a limited space in the dust collecting cup 36 without changing the overall size of the outer wall of the filter 102, and the main filter 102 is directly aerated at an acute angle from the air inlet 100. By disposing at the position where the air is blown, the dust collected on the main filter 102 by the air blown from the air inlet 100 can be easily removed.

  Since the surface area of the main filter 102 can be ensured in this way, the suction force as the vacuum cleaner 11 can be ensured, and the dust collection cup 36 and the vacuum cleaner 11 do not become larger than necessary.

  Further, by positioning the tip of the protruding portion 102a on the extension of the central axis of the intake port 100, dust adhering to the inclined surfaces 102c and 102c of the protruding portion 102a due to the intake air sucked from the intake port 100 is substantially reduced. It can be removed evenly and the appearance of the dust collecting cup 36 is improved.

Further, since the protruding portion 102a is formed along the direction of arrow A, which is the flow of air sucked from the intake port 100, air flows in parallel along the inclined surfaces 102c and 102c, and dust flows into the protruding portion 102a. Is difficult to adhere. Therefore, the inclined surfaces 102c and 102c of the protruding portion 102a can suppress turbulent flow in the coarse dust collecting chamber 75, and the upper portion of the protruding portion 102a can be effectively used as a life-extending filter that is not easily clogged. Further, by using the main filter 102 as a metal filter, it is possible to suppress adhesion of dust due to static electricity.

  Further, by inserting the upper part of the protrusion 102a of the main filter 102 into the intake port 100, the surface area of the main filter 102 can be further increased, and dust adhering to the protrusion 102a of the main filter 102 The suction air sucked from the mouth 100 can be removed more efficiently.

  Further, the surface area of the main filter 102 can be ensured by continuously forming the flat portion 102b at an external position where the protrusion 102a is not inserted into the air inlet 100.

  In addition, since the protruding portion 102a is continuously formed up to the lower end portion of the main filter 102, no step is formed between the lower portion of the protruding portion 102a and the flat portion 102b. It can also prevent clogging of dust.

  Since the main filter 102 can be formed by bending a single mesh-like metal plate, the number of parts can be minimized.

  In the above embodiment, the main filter 102 may be formed with, for example, a plurality of auxiliary protrusions protruding upstream as in the case of the protrusion 102a, instead of the flat portion 102b. In this case, a larger surface area of the main filter 102 can be secured.

  The main filter 102 may be formed of a synthetic resin or the like.

  Furthermore, the vacuum cleaner 11 is not limited to the canister type, and for example, an upright type, a handy type, or an autonomous traveling type can also be used.

It is a side view which cuts out a part and shows the vacuum cleaner of one embodiment of this invention. It is a perspective view which shows the dust collector of a vacuum cleaner same as the above from the lower side. It is a perspective view which shows the state which opened the cover body of the vacuum cleaner main body of a vacuum cleaner same as the above. It is a perspective view which shows a vacuum cleaner same as the above.

11 Vacuum cleaner
75 Coarse dust collection chamber as dust collection chamber
Side filter which is 97b filter
100 Inlet
102 Main filter as filtration filter
102a Protrusion
102b Flat part
The lower filter which is 103 filter

Claims (6)

A dust collection chamber;
An air inlet for sucking air into the dust chamber;
A protrusion having a cross-sectional shape protruding upstream is disposed in the dust collection chamber at a position where air is directly blown at an acute angle from the intake port, and a part of the blown air passes through the protrusion. A filtration filter for filtering dust ,
An electric vacuum cleaner comprising: a filter that is disposed in the dust collecting chamber separately from the filter, and that filters the air blown to the filter through which the dust is filtered . A dust collection chamber;
An air inlet for sucking air into the dust chamber;
A projecting portion having a cross-sectional shape projecting upstream and a flat portion having a flat shape are disposed in the dust collection chamber at a position where air is directly blown from the intake port at an acute angle, and the blown air is A filtration filter for filtering the dust through the protrusion and the flat part;
A vacuum cleaner characterized by comprising: In the filtration filter, only a part of the protruding portion is inserted into the intake port, and the flat portion is located outside the intake port.
The electric vacuum cleaner according to claim 2, wherein: The electric vacuum cleaner according to any one of claims 1 to 3 , wherein a tip of the projecting portion is located on an extension of the central axis of the air inlet. The vacuum cleaner according to any one of claims 1 to 4 , wherein the filtration filter is a metal filter. The intake port is formed in a cylindrical shape,
The vacuum cleaner according to any one of claims 1 to 5, wherein at least a part of the filter is inserted into the air inlet .

Images