JP5164944B2 - Electric vacuum cleaner - Google Patents

Description

  The present invention relates to a vacuum cleaner, and more particularly to a cyclone type vacuum cleaner.

  As a conventional technique, in Patent Document 1, a dust storage chamber is disposed below the dust separation chamber, dust-containing air outside the intake cylinder in the dust separation chamber flows into the dust storage chamber, and the mass of the dust storage chamber is increased. An electric vacuum cleaner which is sucked from the lower opening of the intake cylinder through the first filter at the lower end of the intake cylinder after large sand debris is removed, and sucked into the electric blower through the second filter through the intake cylinder Have been described. Further, an outer cylinder is provided on the concentric circle of the intake cylinder, a compression plate is provided at the lower end thereof, and when the outer cylinder is lowered together with the compression plate, dust accumulated in the dust chamber is compressed by the compression plate, and the inner peripheral surface of the outer cylinder It is described that the brush bristles provided on the surface scrape off dust adhering to the filter formed on the intake cylinder.

  In Patent Document 2, a separation chamber and a dust container are arranged in parallel in a dust collection case, and air outside the inner cylinder in the separation chamber flows into the dust container from the separation chamber. There is described a vacuum cleaner that merges with air and is sucked into an electric blower through a mesh-like net filter and a pleated filter. Further, it is described that when the dust deposited on the mesh-like net filter and compressed by the intake air is thrown away, the mesh-like net filter and the pleated filter rotate around the lower end to open.

  In Patent Document 3, a dust container for collecting dust is provided inside the dust collection case, and the dust container rotates around the lower end when throwing away dust accumulated in the dust container and compressed by intake air. A vacuum cleaner is described that jumps out of the dust collection case while moving and breaks up and down.

  In Patent Document 4, a suction port for sucking contaminated air in the axial direction is formed on one side of a cylindrical cyclone body, and an air discharge port for discharging purified air in the axial direction on the other side. In the cyclone body, there is provided a rotational force applying means for rotating the air sucked in the axial direction in the tangential direction, and the contaminants separated by the centrifugal force are tangentially disposed on the discharge port side. A forward cyclone dust collector is described in which a contaminant discharge port for guiding is provided, and a dust collection box is detachably provided at one end of the contaminant discharge port.

  Patent Document 5 describes an electric vacuum cleaner provided with a cyclone dust collector that is horizontally disposed so that a rotating shaft of a swirling flow generated inside a cyclone portion extends in a substantially horizontal direction. Patent Document 5 discloses that air containing dust from the floor suction port becomes a swirling flow when passing through the flow path for half the circumference of the lid from the suction port of the cyclone dust collector, and enters the cyclone part through the opening. Then, the dust is separated from the air by the umbrella-shaped partition plate of the middle cylinder along the inner peripheral wall of the cyclone dust collector, and collected in the dust collecting section, while the air purified by the swirling flow is The air that has passed through the primary mesh filter is further purified, and then passes through the inner cylinder to the secondary filter, and the air that has entered the dust collecting portion together with the dust is collected when passing through the primary mesh filter. After the dust inside the dust part is compressed and the air purified through the primary mesh filter goes to the secondary filter, the air passing through the inside and outside of the inner cylinder is filtered by the secondary filter. The fact that I was in an electric blower It is.

  Patent Document 6 describes a dust container for a vacuum cleaner in which a swirl flow path, a bypass flow path, and a dust collection space are formed by combining two cases of an outer case and an inner case. In Patent Document 6, the inner case includes a buffer space that receives air entering from the intake port, a swirl flow passage forming portion that guides air in the buffer space in a clockwise direction, and a front side inside the swirl flow passage forming portion. A semi-columnar convex part protruding in the direction is included, and a large number of ventilation holes are formed in the peripheral surface of the semi-columnar convex part near the downstream in the turning direction. The entered air and dust flow to the downstream side while swiveling clockwise along the swirl flow path forming part, swirling around the convex part, and a part of the swirling air is formed on the convex part It is described that it flows to the back side through the vent hole.

Japanese Patent Laid-Open No. 2003-190056 JP 2007-000383 A JP 2009-000320 A JP 2000-157463 A JP 2004-105364 A JP 2007-061199 A

  In patent document 1, in order to compress the dust in a dust storage chamber, since a user must operate a compression board with an operation lever, a user's burden is large.

  Therefore, instead of the first filter of Patent Document 1, it is conceivable to provide the dust container of Patent Document 3 so as to open upward. However, in Patent Document 1, the air that has flowed into the dust storage chamber is the lower end of the intake cylinder. Since it is sucked from the opening, the dust accumulated in the dust container of Patent Document 3 is also sucked together with the air from the lower side of the intake cylinder, and as a result, the amount of dust deposited on the first filter in front of the electric blower increases. There is a risk that the suction power will decrease.

  In Patent Document 2, since the separation chamber and the dust container are arranged in parallel, the diameter of the separation chamber and its inner cylinder cannot be increased, and the dust is deposited in the separation chamber as the dust accumulates in the dust container. The contribution of the intake air from the inner cylinder increases, and the pressure loss of the intake air increases. As a result, the suction force may be reduced as compared with the initial state in which no dust is accumulated. Further, in Patent Document 2, since the mesh-like net filter is planar, the user may not be able to easily remove dust stuck to the mesh-like net filter.

  Therefore, it is conceivable to provide the dust container of Patent Document 3 instead of the mesh-shaped net filter of Patent Document 2, but the dust container of Patent Document 3 has a container shape. There is a risk that the shape of the. In addition, when the user holds the handle of Patent Document 2 and opens the rear part of the dust collecting case, the direction of the dust container of Patent Document 3 is the front side (handle) side for the user. There is a risk that the dust in the container is caught by the rear part of the dust container part of Patent Document 2 and is not discharged well, and the dust container itself that has popped out hits the rear part of the dust container part and the dust container itself does not fly out well. is there.

  In patent document 4, since the rotational force provision means is required in order to generate a cyclone flow, the length of the axial direction of a cyclone dust collector becomes long, As a result, the length of the front-back direction of a vacuum cleaner main body is also comprised. There is a risk of becoming longer. For example, when the dust collection box is disposed adjacent to the cyclone body in the axial direction, the length of the cyclone dust collector in the axial direction is further increased. The length will be even longer. Further, in Patent Document 4, since the flow path is enlarged from the contaminated air inlet and the flow velocity is reduced, a rotational force is applied to the contaminated air. Therefore, the rotational speed is slow, the centrifugal force is reduced, and the contaminated air is sufficiently separated. There is a fear that it cannot be done. Moreover, in patent document 4, since the space from a rotational force provision means to the cylinder part of a discharge port is long and air swirls in multiple times from a rotation force provision means to the cylinder part of a discharge port, the energy loss of air is Large and noise may be generated. Moreover, in patent document 4, since the rotational force provision means is formed with several wing | blade (fin), there exists a possibility that the energy loss of air may be large and noise may also generate | occur | produce. Further, in Patent Document 4, there is no exhaust port from the dust collection box to the outside, and exhaust from the cyclone body is only a small-diameter exhaust port corresponding to the inner cylinder, so the energy loss of exhaust air is large. . Moreover, in patent document 4, since the means to compress the dust deposited on the dust collection box is not provided, the dust storage capacity of the dust collection box is also small.

  In patent document 5, since the flow path which generate | occur | produces a swirling flow is formed in the lid | cover arrange | positioned in the front side of the front-end | tip of a middle cylinder, the length of the horizontal direction (axial direction) of a cyclone dust collector becomes long. As a result, the length of the vacuum cleaner main body in the front-rear direction may be increased. In addition, since the shape of the portion where the primary mesh filter of the middle cylinder is formed is a triangular pyramid, the primary mesh filter is moved to the downstream side in the horizontal direction (axial direction) (from the top to the bottom of the triangular pyramid). There is a risk that dust will easily adhere to the surface of the glass and the suction force will be reduced.

  In Patent Document 6, since the buffer space and the swirl flow path forming portion are formed outside the semi-columnar convex portion in the radial direction, the length of the dust collection chamber in the radial direction (vertical and horizontal directions) becomes long. As a result, the height and width of the front portion of the cleaner body may increase.

  Therefore, an object of the present invention is to provide a compact vacuum cleaner by shortening the axial length of the dust collector without increasing the width.

  In the vacuum cleaner of the present invention, the dust collector includes an inner cylinder having a plurality of through holes on the circumferential surface, one end in the axial direction of the inner cylinder is closed, and the other end in the axial direction of the inner cylinder is opened. The end of the inner cylinder in the axial direction is formed at a position facing the outlet side opening of the inlet pipe of the dust collector. And the one end of the axial direction of an inner cylinder is comprised so that the air suck | inhaled from the inlet pipe of the dust collector may be rotated in the circumferential direction.

  Alternatively, the vacuum cleaner of the present invention is characterized in that the closed portion at one end in the axial direction of the inner cylinder has a shape having a function of rotating the air sucked from the inlet pipe of the dust collector in the circumferential direction. To do.

  Or the vacuum cleaner of this invention has the shape where the obstruction | occlusion part of the axial direction end of the inner cylinder was dented inward in the axial direction of the inner cylinder (for example, the recessed part 8), and a part of dented shape Is characterized by opening in the circumferential surface of the inner cylinder.

  According to the present invention, by providing the turning function at one end of the inner cylinder, the axial length of the dust collector can be shortened without increasing the width, and the vacuum cleaner can be made compact.

It is sectional drawing seen from the side surface of the cleaner body of the Example of this invention. (A) is a perspective view of the dust collector of the Example of this invention, (B) is sectional drawing seen from the side of the dust collector of the Example of this invention. (A) is a perspective view of the inner cylinder and outer cylinder of the Example of this invention, (B) is a perspective view of the back side of the inner cylinder of the Example of this invention. (A) is a perspective view of the state which opened the front cover of the dust accommodating part of the Example of this invention, (B) is the perspective view of the state which opened the rear filter of the dust accommodating part of the Example of this invention. FIG. (A) is the front view which looked at the front cover of the dust accommodating part of the Example of this invention from the dust accommodating part outer side, (B) is dust accommodating the front cover of the dust accommodating part of the Example of this invention. It is the front view seen from the part inside. It is the front view which looked at the dust accommodating part of the Example of this invention from the dust separation part side when a front cover was removed. It is a general-view figure of the vacuum cleaner of the Example of this invention. It is a perspective view of the vacuum cleaner main body of the Example of this invention. It is the front view which looked at the inner cylinder of Example 2 of this invention from the cylindrical part side. It is the front view which looked at the inner cylinder of Example 2 of this invention from the cylindrical part side. It is the perspective view which looked at the inner cylinder of Example 2 of this invention from the cylindrical part side. It is the top view which looked at the inner cylinder of Example 2 of this invention from the outer extension part back side. It is the perspective view which looked at the inner cylinder of Example 2 of this invention from the outer extension part back side. It is the side view which looked at the inner cylinder of Example 2 of the present invention from the upper part. It is the side view which looked at the inner cylinder of Example 2 of this invention from the right side. It is sectional drawing which looked at the inner cylinder of Example 2 of this invention from the right side. They are the perspective view which looked at the dust separation part of Example 2 of the present invention from the front, and the side view which looked from the right side.

  Examples 1 and 2 of the present invention will be described below.

  The vacuum cleaner according to the first embodiment of the present invention includes a vacuum cleaner body 1 having an electric blower 28 and a dust collector 2 that is detachably attached to the vacuum cleaner body 1. A separation unit (for example, a dust separation unit 4) that swirls and separates dust from the air, and a storage unit (for example, a dust storage unit 5) that communicates with the separation unit and stores the dust, the separation unit and the storage unit, Are arranged in the axial direction, and the accommodating portion is provided with a filter (for example, a dust collecting basket 12) having a shape opened on the side communicating with the separating portion and recessed on the opposite side to the side communicating with the separating portion. The air outside the swirling flow of the part flows into the filter in the housing part, and the air inside the swirling flow of the separating part flows into the housing part and outside the filter.

  And according to Example 1 of this invention, the separation part and the accommodating part are arranged in the axial direction and communicated with each other, and the air outside the swirling flow of the separation part is in a filter having a recessed shape in the accommodating part. The air inside the swirling flow of the separation part flows into the housing part and outside the filter having a concave shape, thereby compressing the dust without bothering the user and removing the accumulated dust. The user can easily discharge, and can further suppress a decrease in suction force.

  Or the vacuum cleaner of Example 1 of this invention is the cleaner main body 1 provided with the main body inlet 21 and the electric blower 28 which generate | occur | produces suction power, the main body inlet 21 of the cleaner main body, and the electric blower 28. A dust collecting device 2 that is detachable between the first dust collecting unit 2 and the first dust collecting unit (for example, the dust separating unit 4) that has a substantially cylindrical shape and can communicate with the main body inlet 21; A second dust collecting part (for example, a dust storage part 5) communicating with the axial end of the first dust collecting part and communicating with the electric blower 28, the first dust collecting part being a circumferential surface The inner cylinder 7 having a plurality of through-holes 33 is enclosed in a substantially cylindrical shape, and the second dust collecting portion opens on the side communicating with the first dust collecting portion and communicates with the first dust collecting portion. A ventilation member (for example, a dust collecting basket 12) having a shape recessed on the opposite side to the side is included, and the outer side of the inner cylinder 7 of the first dust collecting portion is recessed in the second dust collecting portion. It communicates with the opening of the ventilation member having the shape, and the inside of the inner cylinder 7 of the first dust collection portion communicates with the outside of the ventilation member having the recessed shape in the second dust collection portion. .

  According to the first embodiment of the present invention, the second dust collecting portion is communicated with the axial end portion of the first dust collecting portion, and the outer side of the inner cylinder 7 of the first dust collecting portion is connected to the first dust collecting portion. The inside of the inner cylinder 7 of the first dust collecting part is connected to the outside of the venting member having the recessed shape inside the second dust collecting part. By communicating, dust can be compressed without bothering the user, the accumulated dust can be easily discharged by the user, and a decrease in suction force can be suppressed.

  In FIG. 1, sectional drawing seen from the side surface of the cleaner body 1 of the Example of this invention is shown. It is preferable that the vacuum cleaner main body 1 is horizontally placed in the usage state of the vacuum cleaner, and the vacuum cleaner main body 1 is vertically placed in the housed state of the vacuum cleaner. When the vacuum cleaner is in use, if the main body inlet 21 side is the front (upstream side) and the main body exhaust port 30 side is the rear (downstream side), the main body inlet 21 is in the direction of gravity in the housed state of the vacuum cleaner. The main body exhaust port 30 is on the lower side in the direction of gravity action. When the cleaner body 1 is placed horizontally, the lower surface of the cleaner body 1 is parallel to the surface (for example, the floor surface) on which the cleaner body 1 is placed and is perpendicular to the direction of gravity action. Become.

  First, the structure of the cleaner body 1 will be described. The dust collector 2 that collects dust from the sucked air is detachably disposed on the front side of the cleaner body 1. When the longitudinal direction (axial direction) of the dust collector 2 is the gravity action direction (vertical arrangement), the height of the cleaner body 1 is increased. On the other hand, the closer the axial direction of the swirling flow in the dust collector 2 (the axial direction of the dust collecting device 2) is to the gravity acting direction, the greater the separation effect due to the centrifugal separation action, and the axial direction of the swirling flow in the dust collecting device 2 When the angle exceeds 45 degrees with respect to the direction of gravity action, the separation effect due to the centrifugal action is extremely reduced. Therefore, in order to reduce the height of the vacuum cleaner main body 1 and suppress a decrease in the separation effect due to the centrifugal separation action, in this embodiment, the axial direction of the dust collector 2 is 40 degrees to the gravity action direction. It is about 45 degrees. However, in order to increase the separation effect by the centrifugal separation action, the axial direction of the dust collector 2 may be smaller than 40 degrees (for example, 0 degree) with respect to the gravity action direction. Instead of disposing the dust separation unit (swivel unit) 4 on the lower side and the dust storage unit 5 on the upper side, the dust separation unit 4 may be disposed on the upper side and the dust storage unit 5 on the lower side. . In this case, the inlet pipe 3 is preferably connected to the circumferential surface of the front end portion in the axial direction of the dust separator 4.

  The dust collector 2 swirls the sucked air and communicates with the dust separator 4 that separates the dust by a centrifugal separation action (cyclone method), and the dust separator 4 accommodates the dust separated by the dust separator 4. A dust container 5 is provided. The dust separator 4 and the dust container 5 are arranged in the axial direction of the dust collector 2 and are connected and communicated with each other in the axial direction. That is, the dust separator 4 is disposed on the front side of the cleaner body 1, and the dust container 5 is disposed on the front side of the cleaner body 1 with respect to the dust separator 4. The dust separator 4 and the dust container 5 are connected so that the user can easily separate the dust separator 4 and the dust container 5. A tubular main body inlet 21 is provided at the front end of the cleaner body 1. A part of the front end face in the axial direction of the dust separator 4 is open, and the opening is connected to the inlet pipe 3. Instead of the front end surface in the axial direction of the dust separator 4, the circumferential surface of the front end in the axial direction of the dust separator 4 may be connected to the inlet pipe 3. The inlet pipe 3 is preferably formed at the center in the width direction of the cleaner body 1. The inner cylinder 7 and the recessed portion 8 are also preferably formed at the center in the width direction of the cleaner body 1.

  The dust separation unit 4 includes a hollow substantially cylindrical outer cylinder 6 and a hollow substantially cylindrical inner cylinder 7 enclosed in the outer cylinder 6 with a concentric axis with the outer cylinder 6. When the axial direction of the dust separation part 4 is inclined with respect to the gravity action direction in order to prevent the separation effect due to the centrifugal separation action from deteriorating due to the axial center of the swirling flow being shifted in the gravity action direction by gravity. The axis of the inner cylinder 7 may be shifted downward with respect to the axis of the outer cylinder 6. As shown in FIG. 3A, one end surface (front end surface) in the axial direction of the outer cylinder 6 is closed except for an opening connected to the inlet pipe 3, and the other end surface in the axial direction (rear end surface) of the outer cylinder 6. ) Is open. The outer cylinder 6 is preferably made of transparent or translucent plastic or resin so that dust accumulation can be seen by the user or a sensor provided outside the outer cylinder 6 can detect the accumulation of dust. One end face (front end face) in the axial direction of the inner cylinder 7 is closed, and the other end face (rear end face) in the axial direction of the inner cylinder 7 is open. As shown in FIG. 3A, a recessed portion 8 that is recessed inward in the axial direction of the inner cylinder 7 is formed at the center of the closed portion of one end surface in the axial direction of the inner cylinder 7. The inlet pipe 3 is opposed to the closed portion of one end surface in the axial direction of the inner cylinder 7, that is, the recessed portion 8. As shown in FIG. 3A, a part of the recessed portion 8 reaches the outer peripheral end of the inner cylinder 7. In order to reduce the pressure loss of air, it is preferable that the opening direction of the recessed part 8 is a downward direction. However, the opening direction of the recessed part 8 may be upward or lateral. As shown in FIG. 3A, at the outer peripheral end of the inner cylinder 7 of the recess 8, the recess 8 does not face straight in the radial direction of the inner cylinder 7 but is slightly inclined in the circumferential direction. As shown in FIG. 1, the depth of the recess 8 in the axial direction is about half of the axial length of the cylindrical portion of the inner cylinder 7. However, the axial depth of the recessed portion 8 may extend over substantially the entire axial length of the cylindrical portion of the inner cylinder 7. In this case, the opening of the recessed portion 8 is formed in a part of the circumferential surface of the inner cylinder 7 over almost the entire length of the cylindrical portion of the inner cylinder 7. Further, a guide tube 38 is connected to the outer peripheral end of the recess 8. The cross section of the guide tube 38 has a substantially ½ circular shape, is formed along the outer peripheral surface of the inner cylinder 7, and the outer peripheral surface of the inner cylinder 7 also forms part of the inner wall surface of the flow path. The guide tube 38 is formed on the outer peripheral surface of the inner cylinder 7 in the circumferential direction by about several centimeters. Therefore, the air that has flowed in the axial direction by the inlet pipe 3 is changed in the radial direction by the recessed portion 8 and further changed in the circumferential direction by the outer peripheral end portion of the inner cylinder 7 of the recessed portion 8. At 38, it can be changed in the circumferential direction. Moreover, it is preferable that the recessed part 8 does not have an unevenness | corrugation, and is formed in a curved surface. Thereby, air can be sufficiently swirled while suppressing pressure loss. The guide tube 38 may not be provided. An outer extension 34 extending toward the outer cylinder 6 is formed on the outer periphery of the other axial end surface (rear end face) of the inner cylinder 7. That is, as shown in FIG. 3A, the other axial end surface (rear side end surface) of the inner cylinder 7 has an annular shape with the inner side of the inner cylinder 7 opened.

  As shown in FIG. 3A, a part of the outer extending portion 34 in the circumferential direction is open. With this opening, air outside the inner cylinder 7 can flow into the dust container 5. The inner cylinder 7 is made of an antibacterial metal (for example, silver, copper) or an antibacterial substance (for example, silver, copper) or a coated metal (for example, stainless steel) so as to suppress the growth of bacteria. Preferably it is configured. However, the inner cylinder 7 may be comprised with resin also including a cylindrical part. Then, as shown in FIG. 3A, the outer cylinder 34 is inserted in the axial direction from the other axial end surface of the outer cylinder 6, so that the outer peripheral end of the outer extension 34 comes into contact with the inner periphery of the outer cylinder 6. As a result, the other axial end surface of the outer cylinder 6 is closed. The outer cylinder 6 and the inner cylinder 7 are connected so that the user can easily separate the outer cylinder 6 and the inner cylinder 7. A plurality of through holes 33 are provided on the circumferential surface of the inner cylinder 7. The inner cylinder 7 has a filter function by the plurality of through holes 33. The through-hole 33 allows air to flow from the outer side of the inner cylinder 7 to the inner side of the inner cylinder 7 without large dust flowing into the inner cylinder 7. Although it depends on the suction force, garbage having a weight of 1 yen or more cannot be sucked up in the outer cylinder 6 and may remain in the outer cylinder 6. By connecting the outer cylinder 6 and the inner cylinder 7 so that the user can easily separate the outer cylinder 6 and the inner cylinder 7, the user can easily separate the outer cylinder 6 and the inner cylinder 7 from each other. The dust accumulated in the outer cylinder 6 can be easily discharged, and the hair and lint caught in the through hole 33 of the inner cylinder 7 can be easily removed.

  In order to keep the airtightness of the connecting portion between the dust separator 4 and the dust container 5, a packing 9 is provided on the other axial end surface of the inner cylinder 7. The packing 9 is not only provided on the outer extension 34, but also projects in the axial direction of the inner cylinder 7. Therefore, the inside of the inner cylinder 7 is not completely hollow, and a partially closed space exists due to the packing 9. Further, a recessed portion 39 that is recessed inward in the axial direction of the inner cylinder 7 is formed in a portion of the packing 9 that protrudes to the inner side of the inner cylinder 7. The recess 39 has a handle function. Thereby, the user can hold the dust separation part 4 or the inner cylinder 7 by inserting a finger into the recess 39. A part of the upper side of the extended portion 34 is open and communicates with the outer flow path 35 of the front lid 11. That is, the inside of the outer cylinder 6 and the outside of the cylindrical portion of the inner cylinder 7 communicates with the outer flow path 35 of the front lid 11. As shown in FIG. 3 (A), the circumferential wall surface of the opening on the upper side of the extended portion 34 has a high wall surface on the side facing the opening of the guide tube 38 in the circumferential direction. The wall surface on the opening side of the guide tube 38 is preferably low. For example, assuming that the opening direction of the guide tube 38 is the counterclockwise direction when the dust separation unit 4 is viewed from the front, the left wall surface is high among the circumferential wall surfaces of a part of the upper opening of the extension portion 34, The wall on the right side is low. That is, since a part of the upper side of the extended portion 34 is opened, the circumferential direction of the extended portion 34 is less than one round of the outer periphery of the inner cylinder 7 but is shifted in a spiral shape. Therefore, the swirling flow outside the inner cylinder 7 can collide with the wall surface in the circumferential direction of a part of the opening on the upper side of the extended portion 34 and can smoothly change the direction in the axial direction. Also easily flows to the dust container 5. On the other hand, the inner side of the inner cylinder 7 communicates with the inner flow path 36 of the front lid 11.

  The dust container 5 is provided with a hollow case 10 having an axially one end face (front end face) and an axially other end face (rear end face) that are substantially inverted triangular in cross section. One end surface in the axial direction of the case 10 is closed by a front lid 11 that can be opened and closed. A shaft 31 is provided at the lower end of the front lid 11, and the shaft 31 is supported by the lower end of the case 10. The front lid 11 can be rotated back and forth in the axial direction of the case 10 with the shaft 31 as a fulcrum. A claw projects from the upper end portion of the front lid 11 on the case 10 side. On the other hand, a button 17 (which may be a lever) that can be pressed by the user is provided on the upper front side of the case 10, and a transmission rod (rod) 18 extending to the front side of the case 10 is connected to the button 17. One end of the transmission rod 18 is connected to the button 17, and the other end of the transmission rod 18 is formed in a claw shape. The claw at the other end of the transmission rod 18 can be engaged with the claw at the upper end of the front lid 11. When the front lid 11 is closed to the case 10, it is possible to prevent the front lid 11 from being opened by engaging the claw at the other end of the transmission rod 18 and the claw at the upper end of the front lid 11. When the user presses the button 17, the transmission rod 18 slides forward (may rotate upward), and the engagement between the other end of the transmission rod 18 and the upper end of the front lid 11 is engaged. The combination is released and the front lid 11 can be opened from the case 10 by gravity. While the handle 16 is formed in a horizontal direction, the normal direction of one end surface in the axial direction of the case 10 (corresponding to the front lid 11 portion) is inclined by 45 to 50 degrees with respect to the horizontal direction. That is, when the user holds the handle 16 and lifts the dust container 5, one end surface in the axial direction of the case 10 (corresponding to the front lid 11 portion) faces downward (the direction of gravity action). Therefore, the front lid 11 can be opened from the case 10 by gravity. As will be described later, if the dust collection basket (dust collection container) 12 is urged by a spring (elastic body) to jump out to the front side of the case 10, the dust collection basket 12 pushes the rear surface of the front lid 11. Therefore, when the user presses the button 17, the front lid 11 can be smoothly opened from the case 10 by the pressing force of the dust collecting basket 12. In other words, the dust collection basket 12 is stored in the case 10 by the opening surface of the dust collection basket 12 being held by the rear surface of the front lid 11, and the stored state is maintained.

  The other axial end surface of the case 10 is closed by a filter 15 that can be opened and closed. A shaft 32 is provided at the lower end of the filter 15, and the shaft 32 is supported by the lower end of the case 10. The filter 15 can be rotated back and forth in the axial direction of the case 10 with the shaft 32 as a fulcrum. The filter 15 is formed with a filter member 79 folded in a pleat shape in a frame body having a substantially square cross-sectional shape. As shown in FIG. 4B, the wave direction of the filter member 79 is preferably the vertical direction (gravity acting direction). The filter 15 is, for example, a high-density HEPA filter (High Efficiency Particulate Air Filter). A HEPA filter is an air filter having a particle collection rate of 99.97% or more with respect to particles having a rated air volume of 0.3 μm and an initial pressure loss of 245 Pa or less. A packing 25 may be provided on the surface of the filter 15 opposite to the case 10. By the packing 25, the airtightness between the other axial end surface of the dust container 5 and the cleaner body 1 (particularly, the inlet of the intake duct 27) can be maintained. The shaft 31 and the shaft 32 may be shared. Further, the shaft 32 may be provided not at the lower end portion of the filter 15 but at the upper end portion of the filter 15.

  A dust collecting basket 12 is enclosed in the case 10. The shape of the dust collecting basket 12 may be a cage shape with one surface opened, a three-dimensional shape, a box shape, a container shape, or a dustpan shape. That is, the dust collecting basket 12 has a shape recessed on the opposite side to the opening. The cross-sectional shape of the dust collecting basket 12 may be a substantially square shape, a substantially circular shape, or a substantially triangular shape. The cross-sectional shape of the dust collecting basket 12 is preferably smaller from the opening surface toward the bottom surface. As a result, the cross-sectional area increases toward the side (opening side) where the dust is discharged, so that the user can easily discharge the dust accumulated in the dust collecting basket 12. The shape of the dust collecting basket 12 is formed by a frame body (support frame). It is preferable that a mesh member made of metal, nylon, or the like is coated or adhered to the bottom surface of the dust collecting basket 12 other than the opening surface, the top, bottom, left and right surfaces. By providing air permeability not only on the bottom surface of the dust collecting basket 12 but also on the top, bottom, left and right surfaces, a flow path can be secured even if dust accumulates on the bottom surface of the dust collecting basket 12, and the pressure loss of the suction air Can be reduced, and a decrease in suction force can be suppressed. This mesh member is air permeable and has a filter function of collecting dust. A disposable tissue paper may be used instead of the mesh member, or a mesh member and a tissue paper may be combined as long as they are breathable and have a filter function for collecting dust. For example, the user may wear tissue paper on the mesh member. The opening surface of the dust collecting basket 12 coincides with the opening surface of one end surface (front end surface) in the axial direction of the case 10. That is, the opening direction of the dust collecting basket 12 and the opening direction of the one end surface in the axial direction of the case 10 are the same. As shown in FIG. 6, the upper half of the outer peripheral end of the opening surface of the dust collecting basket 12 abuts on the inner peripheral surface of one end surface in the axial direction of the case 10, and the outer peripheral end of the opening surface of the dust collecting basket 12 The lower half is not in contact with the inner peripheral surface of one end surface of the case 10 in the axial direction. A shaft 14 is provided at the bottom of the dust collecting basket 12. The shaft 14 is supported in the case 10. Therefore, the dust collecting basket 12 can be rotated back and forth in the axial direction of the case 10 with the lower shaft 14 as a fulcrum. Thereby, when the front lid 11 is opened from the dust container 5, a part of the dust collecting basket 12 can be ejected from the dust container 5 by gravity. Since the formation position of the shaft 14 with respect to the case 10 is on the same side (lower side) as the formation position of the shaft 31 with respect to the case 10, the front cover 11 is obstructed when the front cover 11 is opened from the dust container 5. A part of the dust collecting basket 12 can be ejected from the dust container 5 without any trouble. Further, the shaft 14 may be provided with a helical spring in which an elastic force acts in a direction in which the dust collecting basket 12 is pushed out to the front lid 11 side. As a result, when the front lid 11 is opened from the dust container 5, a part of the dust collection basket 12 can jump out of the dust container 5 vigorously by the elastic force of the spring. The dust accumulated in 12 can be easily discharged. Further, the dust collecting basket 12 is divided into two parts in the vertical direction, that is, it is preferably composed of two structures, that is, an upper half frame (support) and a lower half frame (support). The two divided dust collecting baskets 12 are connected by a shaft 13 formed outside the bottom surface of the dust collecting basket 12. Therefore, as shown in FIG. 4 (A), the dust collecting basket 12 has the opening surface of the dust collecting basket 12 split vertically, with the middle of the bottom as a fulcrum. In particular, when a part of the dust collection basket 12 jumps out of the dust container 5, the dust collection basket 12 breaks up and down. As a result, the user can more easily discharge the dust accumulated in the dust collecting basket 12. In particular, dust stuck to the inner surface of the dust collecting basket 12 can be easily removed. However, the upper and lower divided configuration of the dust collecting basket 12 is not essential. Further, as described above, in addition to the front side of the case 10 being inclined by 40 to 45 degrees with respect to the direction of gravity action, the dust collection basket 12 jumps out of the dust container 5 by 30 degrees, so that the dust collection basket 12 Dust accumulated inside can be discharged in the direction of gravity.

  An outer channel 35 and an inner channel 36 penetrating in the axial direction are formed in the front lid 11. The outer flow path 35 is formed on the upper side of the front lid 11, and one end of the outer flow path 35 communicates with the opening of the extended part 34, particularly between the outer cylinder 6 and the inner cylinder 7 of the dust separation part 4. The other end of the outer flow path 35 communicates with the opening of the dust collecting basket 12 in the case 10. In order to prevent the dust accumulated in the dust collecting basket 12 from flowing back to the outer flow path 35 and the dust separation part 4 when the vacuum cleaner is stopped, the other end of the outer flow path 35 is the opening of the dust collecting basket 12. Of these, it is preferable to communicate with the upper half or near the upper end. However, the other end of the outer flow path 35 may communicate with the central portion of the opening of the dust collecting basket 12. Furthermore, in order to prevent the dust accumulated in the dust collecting basket 12 from flowing back to the outer flow path 35 and the dust separator 4 when the vacuum cleaner is stopped, A check valve (not shown) that covers the flow path 35 is preferably formed. The check valve rotates to the dust collecting basket 12 with the upper end as a fulcrum. However, the check valve is not an essential configuration. The cross-sectional area of the outer flow path 35 increases from one end of the outer flow path 35 toward the other end. The formation direction of the outer flow path 35 is a direction from the outer side of the front lid 11 toward the center side from one end of the outer flow path 35 to the other end. That is, the direction is from the outside of the dust collecting basket 12 toward the center side. In order to suppress the turbulence of the air flowing into the dust collecting basket 12 from the outer flow path 35, the outer flow path 35 is formed in the direction of the wall surface (upper wall surface) on the side where the outer flow path 35 of the dust collecting basket 12 communicates. Is preferred. The inner flow path 36 is formed from the center of the front lid 11 to the lower side, and one end of the inner flow path 36 communicates with the other end opening in the axial direction of the inner cylinder 7 (inside the inner cylinder 7) of the dust separator 4; The other end of the inner flow path 36 communicates with the case 10, particularly with the outside of the dust collecting basket 12. The other end of the inner flow path 36 is preferably in communication with the lower outside of the dust collecting basket 12. The inner flow path 36 is formed avoiding the outer flow path 35. Contrary to the outer flow path 35, the cross-sectional area of the inner flow path 36 is reduced from one end of the inner flow path 36 toward the other end.

  A handle 16 that can be gripped by a user extending in the horizontal direction is provided on the outside of the upper portion of the dust container 5. The user can hold the handle 16, lift the dust container 5 upward, and remove only the dust container 5 from the cleaner body 1 while leaving the dust separator 4 in the cleaner body 1. In addition, if the dust separation part 4 and the dust storage part 5 are connected, if the user holds the handle 16 and lifts the dust storage part 5 upward, the dust separation part 4 and the dust storage part 5 will be described. And, that is, the dust collector 2 itself can be removed from the cleaner body 1. As shown in FIG. 1, the axial direction other end surface (corresponding to the filter 15 portion) of the dust container 5 is preferably inclined toward the case 10 than the vertical surface (gravity acting direction). That is, it is preferable that the lower part is closer to the case 10 side than the upper part of the other axial end surface of the dust container 5. Moreover, as shown in FIG. 1, the formation direction of the axial direction one end surface (equivalent to front cover 11 part) of the dust accommodating part 5 is about 40 to 45 degrees on the case 10 side from the vertical surface (gravity acting direction). Inclined. That is, the lower part is closer to the case 10 side than the upper part of the one axial end surface of the dust container 5. As a result, the one end surface in the axial direction and the other end surface in the axial direction of the dust container 5 have an inverted C shape with respect to the vertical surface (gravity acting direction). Thereby, when a user lifts the dust accommodating part 5 upward, it becomes less caught, and the user can easily remove the dust accommodating part 5 from the cleaner body 1. Then, the user can easily remove the dust separator 4 from the cleaner body 1 by holding the recess 39 and lifting the dust separator 4 upward or obliquely upward after removing the dust container 5. As shown in FIG. 1, it is preferable that the axial direction one end surface (corresponding to the inlet pipe 3 portion) of the dust separating portion 4 is inclined toward the outer cylinder 6 rather than the vertical surface (gravity acting direction). That is, it is preferable that the lower part is closer to the outer cylinder 6 side than the upper part of the other axial end surface of the dust separator 4. As a result, when the user lifts the dust separator 4 upward or obliquely upward, there is less catching, and the user can easily remove the dust separator 4 from the cleaner body 1. Further, not only when the user removes the dust separator 4, but also when the dust separator 4 and the dust container 5 are integrated, that is, when the dust collector 2 itself is removed from the cleaner body 1. Since the one end surface in the axial direction and the other end surface in the axial direction have an inverted C shape with respect to the vertical surface (the direction of gravity action), the user is less likely to be caught when lifting the dust collector 2 upward. Can easily remove the dust collector 2 from the cleaner body 1.

  A hose joint pipe 20 is inserted into the main body inlet 21 and can hold the hose joint pipe 20. A packing 22 is provided at one end of the main body inlet 21. Thereby, the airtightness of the hose joint pipe 20 and the inlet pipe 3 can be maintained. A caster support portion 23 for supporting casters is provided at the front lower end of the vacuum cleaner body 1 (below the dust collector 2). An intake duct 27 extending in the front-rear direction of the cleaner body 1 is provided on the upper rear side in the cleaner body 1. An opening at one end in the extending direction of the intake duct 27 faces the filter 15. An auxiliary filter 26 is provided near the opening at one end of the intake duct 27. Thereby, it is possible to suppress the electric blower 28 from sucking the dust remaining outside the dust collector 2. The other end in the extending direction of the intake duct 27 is closed, and the lower portion near the other end in the extending direction of the intake duct 27, that is, the electric blower 28 side is opened. A dust removing device 24 that removes dust adhering to the filter 15 is provided at a position in contact with the filter 15 at an upper portion of one end of the intake duct 27 of the cleaner body 1. The dust removing device 24 includes a spiral spring (elastic body) on the outer periphery of the rotating body. The dust removing device 24 is rotated by a motor or by pulling out a cord reel, and a spiral spring bounces the filter member 79 of the filter 15 to shake off dust attached to the filter 15. As described above, since the wave direction of the filter 15 is the vertical direction, the dust that has been shaken off easily falls in the direction of gravity. The dust shaken off from the filter 15 accumulates in the case 10. Accordingly, clogging of the filter 15 can be suppressed, a decrease in air pressure loss can be suppressed, and a decrease in suction force can be suppressed. An electric blower 28 that generates a suction force is provided on the lower rear side in the cleaner body 1. The electric blower 28 is installed vertically so that the suction port of the electric blower 28 faces upward. An exhaust duct 40 communicating with the exhaust port of the electric blower 28 is provided on the downstream side of the electric blower 28 and on the front side of the electric blower 28. Further, a filter 29 communicating with the exhaust duct 40 is provided on the downstream side of the exhaust duct 40 and on the front side of the exhaust duct 40. The filter 29 is formed with a filter member 79 folded in a pleat shape in a frame body 78 having a substantially square cross section. The wave direction of the filter member 79 is preferably the vertical direction (gravity acting direction). The filter 15 is, for example, a high-density ULPA filter (Ultra Low Penetration Air Filter). The ULPA filter is an air filter having a particle collection rate of 99.9995% or more for particles having a rated air volume of 0.15 μm and an initial pressure loss of 245 Pa or less. The particle collection efficiency is higher than the particle collection efficiency. And the main body exhaust port 30 is provided in the rear-end surface of the cleaner body 1. FIG.

  Next, the flow of air during operation (when in use) of the vacuum cleaner will be described. The arrows in FIG. 1 indicate the flow of air. When the user turns on the power of the vacuum cleaner, the electric blower 28 operates and generates a suction force. The air sucked from the hose joint pipe 20 flows into the outer cylinder 6 through the inlet pipe 3, hits the dent portion 8, changes its direction in the radial direction, and further, the outer periphery of the inner cylinder 7 of the dent portion 8. The direction is slightly changed in the circumferential direction at the end, and the direction is further changed in the circumferential direction by the guide tube 38. As a result, air turns around the outer cylinder 6 about the axis of the outer cylinder 6. That is, it becomes a swirl flow. The heavy dust contained in the air collects outside the swirling flow by the centrifugal separation action accompanying the swirling of the air. Light dust contained in the air remains not only outside the swirl but also inside. However, in general household cleaning, most of the dust collects outside the swirling flow, and much dust does not remain inside the swirling flow. The air outside the inner cylinder 7 flows into the dust collecting basket 12 through the outer flow path 35 together with heavy dust. The dust is collected by the dust collecting basket 12, accumulated, and further compressed by the suction force. Since the dust is automatically compressed by the suction force, a lot of dust can be held without bothering the user. The air passes through the bottom surface and the top, bottom, left and right surfaces of the dust collecting basket 12 and reaches the filter 15. On the other hand, the swirling inner air flows into the inner cylinder 7 from the through hole 33 of the inner cylinder 7. Dust larger than the through hole 33 cannot pass through the through hole 33 and remains outside the inner cylinder 7. The air in the inner cylinder 7 together with light dust and small dust flows through the inner flow path 36 and flows into the lower outside of the dust collecting basket 12 in the case 10 and reaches the filter 15. The air that has passed through the dust collecting basket 12 and the air that has not passed through the dust collecting basket 12 merge before the filter 15 and pass through the filter 15. Therefore, the dust collecting basket 12 partitions (partitions) the inside of the case 10 into a space communicating with the outer flow path 35 and a space communicating with the inner flow path 36. Alternatively, the dust collection basket 12 partitions (partitions) the inside of the case 10 into a space communicating with the outer flow path 35 and a space facing the filter 15. The filter 15 collects light dust, small dust, and other dust contained in the air. Air that passes through the filter 15 and contains almost no dust flows through the auxiliary filter, flows into the intake duct 27, passes through the opening at the lower portion of the intake duct 27, and is sucked from the suction port at the upper portion of the electric blower 28. The air discharged from the discharge port on the side of the electric blower 28 reaches the filter 29 through the exhaust duct 40, and the dust remaining by the filter 29 is collected. The air that has passed through the filter 29 passes through the electric blower 28, the cord reel chamber (not shown), the gap at the bottom of the cleaner body 1, and the like, and is discharged from the body exhaust port 30 to the outside of the cleaner body 1. . In particular, since the filter 29 has a dust collection efficiency equivalent to or higher than that of a filter mounted on the air cleaner, the air discharged from the cleaner body 1 to the outside is equivalent to or higher than that of the air cleaner. Has been cleaned. FIG. 2A shows a perspective view of the dust collector 2 of the embodiment of the present invention, and FIG. 2B shows a cross-sectional view seen from the side of the dust collector 2 of the embodiment of the present invention. The user can remove the dust collector 2 from the cleaner body 1 by holding the handle 16 and lifting the dust collector 2 upward. However, the dust separator 4 may be left in the cleaner body 1 and only the dust container 5 may be removed from the cleaner body 1. As shown in FIG. 2A, the outer shape of the cross section of the dust separation portion 4 viewed from the axial direction is a substantially circular shape. The outer shape of the cross section of the dust container 5 is substantially circular at the front lid 11, but is substantially square after the front lid 11, and is also substantially square at the filter 15. As shown in FIG. 2B, the opening direction at one axial end of the case 10 and the opening direction at the other axial end of the case 10 are not in a straight line and differ by about 45 to 50 degrees. That is, the axial direction of the dust container 5 is bent slightly forward from the middle. As described above, one end surface in the axial direction of the dust collector 2 (portion of the inlet pipe 3) faces slightly downward (the direction of gravity action), and the other end surface in the axial direction of the dust collector 2 (portion of the filter 15) is also , Slightly facing downward (gravity acting direction), one end surface in the axial direction and the other end surface in the axial direction of the dust collector 2 have an inverted C shape with respect to the vertical surface (gravity acting direction). Therefore, when the dust collector 2 is lifted upward, the amount of catch is reduced, and the user can easily remove the dust collector 2 from the cleaner body 1.

  3A shows a perspective view of the inner cylinder 7 and the outer cylinder 6 of the embodiment of the present invention, and FIG. 3B shows a perspective view of the back side of the inner cylinder 7 of the embodiment of the present invention. One end surface of the outer cylinder 6 is closed except for a portion where the inlet pipe 3 is formed, and the other end surface of the outer cylinder 6 is opened. The inner cylinder 7 has an annular extending portion 34 at one end of the cylindrical portion. As shown in FIG. 3A, the outer peripheral end of the other end surface of the outer cylinder 6 abuts on the outer peripheral end of the outer extension part 34 by being inserted into the outer cylinder 6 from the cylindrical portion of the inner cylinder 7 in the axial direction. Thus, the inner cylinder 7 is formed in the outer cylinder 6. As shown in FIG. 3A, the opening direction of the inlet pipe 3 and the opening of the recessed portion 8 are opposed to each other. The opening direction of the recess 8 toward the outer peripheral end of the inner cylinder 7 is substantially downward, and the opening direction of the guide tube 38 in the circumferential direction is counterclockwise. The circumferential opening direction of the guide tube 38 may be clockwise. And the hole penetrated to an axial direction is provided in the upper part of the outward extension part 34, ie, the upper part of the outward extension part 34 is opening. The left wall surface of the opening is higher than the right wall surface. That is, the wall surface (left wall surface) of the upper opening of the extension part 34 facing the opening direction in the circumferential direction of the guide tube 38 is higher than the other wall surface (right wall surface). The surface of the extended portion 34 is spiral, and has a function of a flow path that smoothly guides air to the opening above the extended portion 34. As shown in FIG. 3 (B), the upper substantially semicircular portion in the inner cylinder 7 is provided with a recessed portion 39 that is recessed toward the inner side of the inner cylinder 7, and the lower substantially semicircular portion is formed in the inner cylinder 7. Open in. When the flow rate of air outside the inner cylinder 7 is made larger than the flow rate of air inside the inner cylinder 7 in a state where dust is not accumulated in the dust collecting basket 12, the upper portion of the extended portion 34 is higher than the opening area inside the inner cylinder 7. The opening area may be increased. The area of the recessed portion 39 may be increased as compared with the opening into the inner cylinder 7, or the area of the opening into the inner cylinder 7 may be increased as compared with the recessed portion 39. Then, the user can easily hold the dust separation part 4 or the inner cylinder 7 by putting his / her finger into the recess 39.

  When the cylindrical portion of the inner cylinder 7 is formed of a metal material having an antibacterial effect, first, a plurality of through-holes 33 having a diameter of about 0.1 mm to 0.4 mm are etched into a thin metal plate, and then both ends are formed. Join into a cylindrical shape. The through hole 33 may be punched. Examples of the metal material having an antibacterial effect include stainless steel, silver, and copper. The alloy is not limited to stainless steel, silver and copper, and may be any alloy containing silver or copper or having silver or copper surface-deposited. The thickness of the metal thin plate is 1 mm or less, and about 0.1 mm to 0.5 mm is preferable for improving workability. When the thickness of the metal thin plate is thin, it is preferable to fix both ends in the axial direction of the cylindrical metal thin plate with a resin having good moldability in order to improve the strength and roundness. Specifically, the shape of one end of the substantially circular shape of the inner cylinder 7 having the recess 8 and the guide tube 38 and the shape of the other end of the inner cylinder 7 having the annular outer extension 34 are formed. Then, a cylindrical metal thin plate is set, and then insert molding is performed by pouring resin into a mold. In the case of insert molding, the metal thin plate may not be formed into a cylindrical shape by joining both ends. Thus, only the cylindrical portion of the inner cylinder 7 in which the substantially circular one end portion of the inner cylinder 7 having the recessed portion 8 and the guide tube 38 and the other end portion of the inner cylinder 7 having the annular outer extending portion 34 are made of resin. Can be made of a metal material. Insert molding can simplify the manufacturing process.

  FIG. 4 (A) shows a perspective view of a state in which the front lid 11 of the dust container 5 of the embodiment of the present invention is opened, and FIG. 4 (B) shows the rear part of the dust container 5 of the embodiment of the present invention. The perspective view of the state which opened the filter is shown. As shown in FIG. 4A, when the front lid 11 is pivoted downward with the shaft 31 as a fulcrum, the dust collecting basket 12 is also pivoted downward with the shaft 14 as a fulcrum. At this time, the dust collecting basket 12 is divided into two parts up and down with the shaft 13 as a fulcrum. The opening of the dust collection basket 12 when it jumps out of the dust storage section 5 is wider than the opening of the dust collection basket 12 stored in the dust storage section 5. As a result, the dust stuck to the inner surface of the dust collecting basket 12 can be easily removed. When the user attaches the tissue paper along the inner surface of the dust collecting basket 12, the end of the tissue paper is sandwiched between the frame of the opening of the dust collecting basket 12 and the outer peripheral end of the front lid 11. In this case, the tissue paper can be prevented from shifting or coming off. As shown in FIG. 4B, the filter 15 is also rotated downward and opened with the shaft 32 as a fulcrum. As a result, the user can easily discharge the dust accumulated outside the dust collecting basket 12 in the case 10, and can easily remove the dust attached to the side surface of the case 10 of the filter 15.

  FIG. 5A is a front view of the front lid 11 of the dust container 5 according to the embodiment of the present invention as viewed from the outside of the dust container, and FIG. 5B is a dust container according to the embodiment of the present invention. It is the front view which looked at the front lid 11 of 5 from the dust accommodating part inner side. The hatched portion in the figure shows the frontmost surface, not the cross section. A shaft 31 that is rotatably supported by the case 10 is provided at the lower end of the front lid 11. The front lid 11 has a substantially circular shape. A substantially circular portion outside the shaded portion shown in FIG. 5A can contact the outer peripheral end of the other end surface in the axial direction of the dust separation portion 4. A substantially circular portion inside the hatched portion shown in FIG. 5A can contact the outer peripheral end of the other axial end surface of the inner cylinder 7 of the dust separating portion 4. On the upper side of the front lid 11, that is, on the side opposite to the shaft 31, an opening of the outer flow path 35 is formed between a substantially circular portion outside the shaded portion and a substantially circular portion inside. The opening position on the front side (outside of the dust container 5) of the outer channel 35 may be the left and right sides or the lower side of the front lid 11, but the opening position on the back side (inside the dust container 5) of the outer channel 35 is the front cover. 11, the opening position on the front side of the outer flow path 35 is also preferably above the front lid 11 in order to reduce the pressure loss of the air by reducing the length of the outer flow path 35. . On the other hand, an opening of the inner flow path 36 is formed inside the inner cylinder 7. In the front view of FIG. 5A, the opening area of the inner flow path 36 is larger than the opening area of the outer flow path 35, but the upper semicircular portion in the inner cylinder 7 has a recess 39. Therefore, when the flow rate of air outside the inner cylinder 7 is made larger than the flow rate of air inside the inner cylinder 7, the substantial flow path area is that the opening of the inner flow path 36 is larger than the opening area of the outer flow path 35. The area is smaller. A portion where the opening of the outer flow path 35 between the substantially circular portion outside the shaded portion and the inner substantially circular portion is not formed is closed. A substantially circular portion outside the shaded portion shown in FIG. 5B abuts on the outer peripheral end of the axial end surface of the case 10 and a part of the outer peripheral end of the opening of the dust collecting basket 12. As shown in FIG. 5B, the opening of the outer flow path 35 is formed above the vertical center line of the front lid 11. Thereby, when the vacuum cleaner is stopped, it is possible to prevent the dust accumulated in the dust collecting basket 12 from flowing back to the outer flow path 35 and the dust separator 4. However, the opening of the outer flow path 35 may be formed in the center portion including the vertical center line of the front lid 11. Furthermore, it is preferable to form a check valve (not shown) that covers the outer flow path 35. This further prevents the dust accumulated in the dust collecting basket 12 from flowing back to the outer flow path 35 and the dust separator 4 when the vacuum cleaner is stopped. On the other hand, an opening of the inner flow path 36 is formed near the lower end of the front lid 11. However, the opening position of the inner flow path 36 may be lower than the opening position of the outer flow path 35, or may be on the left or right side or the upper side. The hatched portion on the upper side of the opening of the inner flow path 36 contacts the lower end of the outer peripheral end of the opening of the dust collecting basket 12. Then, as shown in FIG. 5B, the opening area of the outer flow path 35 is larger than the opening area of the inner flow path 36 on the back side of the front lid 11 (inside the dust container 5). Furthermore, as shown in FIGS. 5A and 5B, the opening area (FIG. 5B) of the other end (back side) of the outer flow path 35 is equal to that of one end (front side) of the outer flow path 35. It is larger than the opening area (FIG. 5A). That is, the outer flow path 35 extends from one end to the other end. On the other hand, as shown in FIGS. 5 (A) and 5 (B), the opening area (FIG. 5 (B)) of the other end (back side) of the inner flow path 36 is equal to that of one end (front side) of the inner flow path 36. It is smaller than the opening area (FIG. 5A). That is, the inner flow path 36 is narrowed from one end to the other end.

  FIG. 6 shows a front view as seen from the dust separating portion side when the front lid 11 of the dust accommodating portion 5 of the embodiment of the present invention is removed. As in FIG. 5, the hatched portion in the figure indicates the frontmost surface, not the cross section. The substantially circular shaded portion is in contact with the outer peripheral end of the front lid 11. As shown in FIG. 6, the outer peripheral end of the opening on one end surface in the axial direction of the case 10 abuts a part of the outer peripheral end of the opening of the dust collecting basket 12. As shown in FIG. 6, 80% or more of the opening on one end surface in the axial direction of the case 10 is occupied by the opening of the dust collecting basket 12. A region other than the opening of the dust collection basket 12 in the opening of the case 10 (the remaining 20% or less) faces the opening of the inner flow path 36 and communicates with the inner flow path 36.

  FIG. 7 is a schematic view of a vacuum cleaner according to an embodiment of the present invention. In addition to the vacuum cleaner main body 1, the vacuum cleaner includes a suction tool 50 having a suction port, one end communicating with the suction tool 50, a telescopic joint pipe (extension pipe) 51, and one end communicating with the other end of the joint pipe 51. An operation tube 52 having a handle 53 and an operation button / switch that are gripped by the user, and a hose 54 having one end communicating with the other end of the operation tube 52 and the other end forming the hose coupling tube 20 are provided. The hose joint pipe 20 is inserted into the main body inlet 21 of the cleaner body 1 and can be held. Further, wheels 55 are provided on both side surfaces of the cleaner body 1. And if the power supply of a vacuum cleaner is turned ON by operation to an operation button / switch from a user, the electric air blower 28 will act | operate and will generate | occur | produce suction | attraction force. The air sucked from the suction port of the suction tool 50 passes through the joint pipe 51, the operation pipe 52, the hose 54, and the hose joint pipe 20 in this order, and flows into the cleaner body 1.

  FIG. 8 is a perspective view of the cleaner body 1 according to the embodiment of the present invention. In the vicinity of the center of the upper surface of the cleaner body 1, an upper cover 56 for the dust collector 2, one end of which is rotatably supported on the cleaner body 1 by a shaft, is provided. On the rear side, a handle 37 is provided that is rotatably supported by the vacuum cleaner main body 1 by a shaft so that the user can lift the vacuum cleaner main body 1.

  According to the embodiment of the present invention, dust can be compressed without bothering the user, the user can easily discharge the dust that has been compressed and accumulated, and a reduction in suction force can be suppressed. The upper cover 56 is preferably formed in a size and position that covers the handle 16 of the dust collector 2 in a closed state. Furthermore, it is preferable that the rotation of the upper cover 56 is locked so that the upper cover 56 does not open during the operation of the cleaner body 1 or the operation of the cleaner body 1 is stopped when the upper cover 1 is opened. The upper cover 56 can prevent the user from removing the dust collector 2 during the operation of the cleaner body 1 and can improve the safety of the vacuum cleaner.

  Details of the inner cylinder 7 of the first embodiment will be described as a second embodiment.

  In the vacuum cleaner according to the second embodiment of the present invention, the dust collector 2 includes the inner cylinder 7 having a plurality of through holes 33 on the circumferential surface, and one end in the axial direction of the inner cylinder 7 is closed. The other end in the axial direction is opened and communicated with the electric blower 28 side, and one end in the axial direction of the inner cylinder 7 is formed at a position facing the outlet side opening of the inlet pipe 3 of the dust collector 2. And the one end of the axial direction of the inner cylinder 7 is comprised so that the air suck | inhaled from the inlet tube 3 of the dust collector 2 may be rotated in the circumferential direction.

  Or the vacuum cleaner of Example 2 of this invention has the function in which the obstruction | occlusion part of the end of the axial direction of the inner cylinder 7 turns the air inhaled from the inlet pipe 3 of the dust collector 2 to the circumferential direction. It has a shape.

  Or the vacuum cleaner of Example 2 of this invention has the shape where the obstruction | occlusion part of the axial direction end of the inner cylinder 7 was dented inside the axial direction of the inner cylinder 7 (for example, the recessed part 8), A part of the recessed shape is characterized by opening in the circumferential surface of the inner cylinder 7.

  And according to Example 2 of this invention, by giving the turning function to the end of the inner cylinder 7, the axial length of the dust collector 2 can be shortened without increasing the width, and the vacuum cleaner can be Can be made compact.

  FIG. 9 is a front view of the inner cylinder 7 according to the second embodiment of the present invention as viewed from the cylindrical portion side. The cylindrical portion of the inner cylinder 7 includes a hollow semi-columnar column portion 57 and a hollow truncated cone portion 58. The column portion 57 is located on the distal end side of the cylindrical portion of the inner cylinder 7, and the truncated cone portion 58 is located on the root side of the cylindrical portion of the inner cylinder 7. The base of the truncated cone part 58 is joined to the inner peripheral end of the outer extension 34. The frustoconical portion 58 gently smoothes the joint between the cylindrical portion 57 and the extension 34, suppresses air flow separation and turbulence, reduces the energy loss of the sucked air, and suppresses noise. it can. In the inner cylinder 7, it is preferable that the outer extending portion 34, the guide tube 38 (guide member), the columnar portion 57, and the truncated cone portion 58 are integrally formed. The cylindrical portion is not composed of the column portion 57 and the truncated cone portion 58 but may be composed of only the column portion 57 or only the truncated cone portion 58. That is, the columnar portion 57 may have a columnar shape or a truncated cone shape.

  R1 is the outer radius of the cylindrical portion 57, R2 is the outer radius of the truncated cone portion 58, R3 is the outer radius of the extension 34, and R4 is the outer radius of the guide tube 38. The outer shape of the extended portion 34 is a substantially perfect circle. The semicircle of the cylindrical portion 57 is also a substantially perfect circle. The extension part 34, the columnar part 57, and the truncated cone part 58 are formed on concentric axes and have a relationship of R1 <R2 <R3. For example, R1 is about 3 cm, R2 is about 5 cm, and R3 is about 6.5 cm. The axial center of the guide tube 38 is shifted to the left in FIG. 9 with respect to the axial center of the cylindrical portion 57, and has a relationship of R1 <R4 <R2. For example, R4 is about 4 cm. One end of the cylindrical portion 57 in the circumferential direction (lower side in FIG. 9) is terminated, and the other end (upper side in FIG. 9) is joined to the guide tube 38. The side wall of the guide tube 38 is gently curved in a semicircular shape with a radius of curvature R 4 from the other end of the column portion 57 to the front of the guide tube end portion 59. Is gently curved along the outer periphery of the cylindrical portion 57 (along the outer periphery of the truncated cone portion 58). That is, one end of the guide tube 38 is connected to the opening of the recessed portion 8, and the other end faces the direction along the outer periphery of the cylindrical portion 57 outside the cylindrical portion 57 (the direction along the outer periphery of the truncated cone portion 58). In the meantime, it is gently curved into a substantially semicircular shape so as to turn 180 °. The recess 8 itself is preferably formed in a gentle spherical shape with no step from the side wall of the recess 8 toward the center of the bottom, and the joint between the recess 8 and the guide tube 38 is also formed smoothly without a step. It is preferable. Thereby, the energy loss of the inhaled air can be reduced and noise can be suppressed.

  The cylindrical portion 57 has a thickness D1 (between the outer shape R1 and the side wall of the recessed portion 8) of about 3 mm, the inside of the thickness D1 of about 3 mm is hollow, and the space communicates with the through hole 33. To do. One end of the cylindrical portion 57 forms the inner wall of the flow path where the air flow turns approximately 180 degrees, so that the thicker one can reduce noise. Therefore, the thickness D1 of the cylindrical portion 57 is preferably about 3 mm, whereas the thickness at one end of the cylindrical portion 57 is preferably increased to about 6 mm. That is, it is preferable that the radius of curvature at one end of the cylindrical portion 57 is about 3 mm. Thereby, noise can be reduced. In addition, if the thickness D1 of the cylindrical portion 57 is also increased, dust is easily clogged. Therefore, the thickness D1 of the cylindrical portion 57 is preferably about 3 mm. The radius (R1-D1) of the recess 8 is preferably equal to or slightly larger (within 1 mm) than the inner radius of the outlet opening of the inlet pipe 3. This is because if the radius of the recess 8 is smaller than the inner diameter of the outlet opening of the inlet pipe 3, dust may be clogged, air energy loss may increase, and noise may increase.

  The through-hole 33 is preferably not formed in the truncated cone portion 58 or the guide tube 38 but formed only on the outer peripheral surface of the cylindrical portion 57. However, the through-hole 33 may be formed not only in the outer peripheral surface of the cylindrical portion 57 but also in the truncated cone portion 58 and the guide tube 38. The diameter of the through hole 33 may be about 2 mm. When the diameter of the through hole 33 is about 2 mm, the number of the through holes 33 is preferably about 100.

  When viewed from the radial direction, the guide tube end portion 59 which is a part of the guide tube 38 is substantially from the circumferential root portion 60 of the guide tube end portion 59 toward the circumferential tip 61 of the guide tube end portion 59. It has the shape of "<". As shown in FIG. 9, the guide tube end portion 59 and the cylindrical portion 57 overlap when viewed from the radial direction. By forming the terminal end (guide tube terminal portion 59) of the guide tube 38 so as to overlap with one end of the cylindrical portion 57, a sufficient turning force can be applied to the sucked air. One end opening of the outer flow path 35 (opening of the upper part of the extension part 34) is formed on the opposite side (180 degree opposite side) in the circumferential direction with respect to the guide pipe end part 59. The through hole 33 only needs to be formed at least between the guide tube terminal portion 59 and one end opening of the outer flow path 35. In order to facilitate the flow of dust into the outer flow path 35, it is preferable that the circumferential length of one end opening of the outer flow path 35 is longer. The downstream side wall surface 65 (left wall surface) of one end opening of the outer flow path 35 is higher than the upstream side wall surface 66 (right wall surface), and the downstream side wall surface 65 extends from the inner peripheral side to the outer peripheral side when viewed in the axial direction. And the outer peripheral side is longer in the circumferential direction toward the upstream side wall surface 6 than the inner peripheral side. This is because, in the unlikely event that garbage with length such as hair or lint is caught on the downstream side wall surface 65, the outer circumferential side is lengthened in the circumferential direction, and the force to guide these garbage to the inner circumferential side works. This is because the balance is gradually lost and dust is stored in the dust container 5. In order to prevent dust accumulated in the dust container 5 from spilling from the other end opening of the outer flow path 35 of the front lid 11, the one end opening of the outer flow path 35 is preferably arranged on the upper side. Therefore, when it is desired to increase the centrifugal separation distance, the position of the opening of one end of the outer flow path 35 is left as it is, and the position of forming the opening of the recess 8 and the position of forming the guide tube terminal portion 59 are outward in the clockwise direction. A position close to one end opening of the flow path 35, that is, a position on the left side in FIG.

  FIG. 10 is also a front view of the inner cylinder 7 according to the second embodiment of the present invention viewed from the cylindrical portion side. The arrows in FIG. 10 indicate the flow direction of the sucked air. The air that has flowed into the recessed portion 8 in the substantially axial direction is turned in the radial direction by the recessed portion 8 and turned in the circumferential direction by the guide tube 38, and is about a half turn between the inner tube 7 and the outer tube 6 (that is, guidance). From the pipe end portion 59 to the one end opening of the outer flow path 35, it flows (swivels) in the circumferential direction and the axial direction, and most of the inflowed air flows into one end opening of the outer flow path 35 (flow 64). Therefore, the recess 8 and the guide tube 38 have a function of turning the air that has flowed in substantially the axial direction. A portion of the air flowing (swirling) in the circumferential direction and the axial direction between the inner cylinder 7 and the outer cylinder 6 (ie, from the guide tube terminal portion 59 to the opening of one end of the outer flow path 35) is a through hole. It flows into the inner cylinder 7 from 33 (flow 63). In addition, the air that has not flowed to the one end opening of the outer flow path 35 is approximately half a circumference between the guide tube 38 and the outer cylinder 6 (that is, from one end opening of the outer flow path 35 to the guide tube end portion 59) in the circumferential direction. The flow (flow 64) merges with the air coming out of the guide tube 38. In the second embodiment of the present invention, the air swirled outside the inner cylinder 7 flows into the dust container 5 that communicates with the electric blower 28 through the outer flow path 35, so there is no need to increase the centrifugal separation distance. It may be about half a circle. Therefore, the height of the inner cylinder 7 and thus the axial length of the dust separator 4 can be shortened, the axial length of the dust collector 2 can be shortened, and the cleaner body 1 can be made compact. The outer diameter of the dust separation part 4 substantially corresponds to the outer diameter of the inner cylinder 7, that is, the outer diameter 2R3 of the extended part 34. The axial length of the dust separator 4 (excluding the inlet pipe 3) substantially corresponds to the axial height H5 of the inner cylinder 7. And it has the relationship of H5 <2R3. Therefore, the axial height of the dust separator 4 is smaller than the vertical width or the horizontal width of the dust separator 4. For example, 2R3 is about 13 cm and H5 is about 7 cm. The flow rate of the air (flow 62) flowing into the one end opening of the outer flow path 35 is the flow rate V1, the flow rate of the air (flow 63) flowing into the inner cylinder 7 from the through hole 33 is the flow rate V2, and the one flow opening to the one end opening of the outer flow path 35. If the flow rate of the air (flow 64) that does not exist is the flow rate V3, the relationship is V1> V2> V3.

  The flow path width W in the radial direction is larger than the flow path width W1 at the guide pipe end portion 59 of the guide pipe 38, and the flow path width W2 at the position exiting the guide pipe 38 is widened. From the outlet to one end opening of the outer flow path 35 is constant (flow path width W2), and from one end opening of the outer flow path 35 to the guide tube end portion 59 gradually decreases from the flow path width W2 to the flow path width W3. The guide tube end portion 59 has a flow path width W3. And it has the relationship of W2> W1> W3. If W3 is too small, dust may be clogged. For example, W3 is about 1.0 cm. For example, W2 is R3-R1 and is about 4 cm. W1 is W2-W3- (the thickness in the radial direction of the guide tube end portion 59), which is slightly smaller than 3 cm.

  FIG. 11 is a perspective view of the inner cylinder 7 according to the second embodiment of the present invention as viewed from the cylindrical portion side. The side wall of the guide tube end portion 59 does not end perpendicularly to the circumferential direction, but ends in a substantially “<” shape bent in two stages. Specifically, the guide tube end portion 59 is terminated at an angle close to a perpendicular to the circumferential direction from the axial tip portion to the axial intermediate portion, and to the axial base portion of the guide tube end portion 59 of the guide tube end portion. Terminates at a much greater slope than the normal to the circumferential direction. For example, if the side wall of the guide tube end portion 59 terminates perpendicularly to the circumferential direction at the position of the circumferential root portion 60 of the guide tube end portion 59, a sufficient turning force cannot be applied, and sufficient The dust cannot be separated. On the other hand, if it terminates perpendicularly to the circumferential direction at the position of the circumferential tip 61 of the guide tube end portion 59, the turning force is too strong and less air flows into the outer flow path 35 in the first turn. In some cases, dust (especially dust having a large specific gravity) is not sucked into the outer flow path 35, and dust remains in the dust separator 4. In particular, in the present invention, since the inlet side of the dust separator 4 is positioned below the gravitational direction and the outlet side is positioned above the gravitational direction, the dust is not sucked into the outer flow path 35 and the dust remains in the dust separator 4. Is remarkable. Therefore, by ending the guide tube terminal portion 59 in a substantially “<” shape, a necessary and sufficient turning force can be applied to the air flowing into the recessed portion 8. Further, since the air that has flowed into the recessed portion 8 flows toward the downstream side in the axial direction, when viewed at the guide tube end portion 59, the axial base side of the guide tube end portion 59 rather than the axial front end side. The flow rate increases (pressure increases). Thus, by making the axial base side longer in the circumferential direction than the axial front end side of the guide pipe terminal end 59, a sufficient turning force can be applied to the axial base side of the guide pipe terminal end 59 having a large flow rate. it can. In addition, instead of making the guide tube end portion 59 into a substantially “<” shape, the side wall of the guide tube end portion 59 is gradually inclined in the circumferential direction in one step from the axial front end side to the axial root side. You may do it.

  FIG. 12 is a top view of the inner cylinder 7 according to the second embodiment of the present invention as viewed from the rear side of the outer extension portion. FIG. 13: is the perspective view which looked at the inner cylinder 7 of Example 2 of this invention from the outer extension part back side. The packing 9 (seal member) is attached to the back side of the extended portion 34 by three screws 67 (attachment members). The packing 9 includes an annular lip 68 (projecting portion) located on the outer peripheral side and an annular lip 69 (projecting portion) located on the inner peripheral side. The lip 68 is provided to keep the airtightness between the inner cylinder 7 and the front lid 11 in the outer flow path 35, and the lip 69 keeps the airtightness between the inner cylinder 7 and the front lid 11 in the inner flow path 36. Is provided to do. The lip 68 and the lip 69 are formed extending from the inner peripheral side toward the outer peripheral side. Therefore, when the dust collection container 5 is attached to the dust collection separation part 4, the lip 68 and the lip 69 abut against the front lid 11 of the dust collection container 5, and elastically deform to keep the airtight. . Further, when the electric blower 28 is activated and a suction force is generated, the dust collecting / separating portion 4 is sucked into the dust collecting housing portion 5, and the lip 68 and the lip 69 are further elastically deformed to keep the airtightness. Therefore, when the electric blower 28 is operating as compared to the case where the electric blower 28 is stopped, the airtight holding force between the dust collection housing 5 and the dust collection separation unit 4 is increased. However, the lip 69 is preferably formed extending from the outer peripheral side toward the inner peripheral side. When the lip 69 is formed extending from the inner peripheral side toward the outer peripheral side, the end of the outer flow path 35 is formed. The dust from the outer flow path 35 is caught on or leaked from the inner peripheral portion 100 of the inner wall. By forming the lip 69 so as to extend from the outer peripheral side toward the inner peripheral side, it is possible to prevent dust from being caught or leaked. The packing 9 is preferably formed integrally with an elastic material such as rubber including the lip 68 and the lip 69.

  The substantially upper half of the inner peripheral side of the cylindrical portion (the inner peripheral side of the lip 69) is closed by a packing 9 having a recess 39 that is recessed inward in the axial direction of the cylindrical portion. The substantially lower half of the inner peripheral side is open without being closed by the packing 9. This opening forms an inner flow path 36. The area of the portion closed by the packing 9 may be the same as or smaller than the area of the opened portion. By making the area of the portion closed by the packing 9 smaller than the area of the opened portion, energy loss and noise of the air flowing through the inner flow path 36 can be reduced.

  FIG. 14 is a side view of the inner cylinder 7 according to the second embodiment of the present invention as viewed from above. The downstream side wall surface 65 (left wall surface) of one end opening of the outer flow path 35 is higher than the upstream side wall surface 66 (right wall surface), and is opened by a difference dH of this height. As a result, the flow outside the cylindrical portion can be smoothly changed in the axial direction along the downstream side wall surface 65, and the dust contained in the swirl flow can easily flow into the dust container 5. The inner wall surface 101 of the outer channel 35 is inclined or curved in the circumferential direction from the downstream side wall surface 65 that is the inlet of the outer channel 35 toward the other axial end surface of the inner cylinder 7 that is the outlet of the outer channel 35. Formed. Thereby, dust can flow smoothly in the outer flow path 35. In addition, since the inner wall surface 101 of the outer flow path 35 is inclined or curved, not only the axial component but also the circumferential component (swirl component) is included in the air flow that exits the outer flow path 35. Remains.

  FIG. 15 is a side view of the inner cylinder 7 according to the second embodiment of the present invention as viewed from the right side. The outward extension 34 has a lower axial height toward the outer flow path 35 (from the lower side to the upper side). The surface of the extended portion 34 is formed in a spiral shape toward the outer flow path 35 in one round. When the height of the cylindrical portion 57 is H1, and the height of the truncated cone portion 58 at the highest position is H2, the relationship is H1> H2. Further, assuming that the height of the guide tube 38 at the highest position is H3, there is a relationship of H3> H1. The through-hole 33 may be formed at least between the guide tube end portion 59 and one end opening of the outer flow path 35, but among them, the through hole 33 is more concentrated on the guide tube end portion 59 side than the outer flow path 35 side. As long as it is formed. This is because the flow rate flowing into the outer flow channel 35 is larger than the flow rate flowing into the through-hole 33 on the outer flow channel 35 side, and there is no point in forming the through-hole 33 on the outer flow channel 35 side.

  FIG. 16 is a cross-sectional view of the inner cylinder 7 according to the second embodiment of the present invention as viewed from the right side. When the depth at the deepest portion in the axial direction of the recessed portion 8 is H4, the relationship is H4 <H1. That is, the depth of the recessed portion 8 is shallower than the height of the cylindrical portion 57. When viewed three-dimensionally, the recess 8 is hemispherical, and the cross-sectional shape of the recess 8 is substantially a semicircle as shown in FIG. Therefore, the depth H4 of the recessed portion 8 is substantially equal to the outer radius R1 of the cylindrical portion 57 or the radius of the opening of the recessed portion 8. Therefore, the formation position of the recess 8 in the axial direction overlaps the formation position of the through hole 33 in the axial direction. If the depth H4 of the dent portion 8 is too deep, the flow rate of air sucked from the through-hole 33 is reduced. On the other hand, if the depth H4 of the dent portion 8 is too shallow, dust may be trapped in the dent portion 8. It is. Considering the ease of injection molding, the recess 8 is preferably hemispherical. However, the recessed portion 8 is not limited to a hemispherical shape, and may be an elliptical shape shallower or deeper than the hemispherical shape. One end of the bottom surface of the guide tube 38 is gently joined to the bottom surface of the recessed portion 8 without a step, and the other end of the bottom surface of the guide tube 38 is gently joined to the surface of the extended portion 34 without a step. The bottom surface of the guide tube 38 preferably slopes smoothly from one end of the bottom surface of the guide tube 38 to the other end of the bottom surface of the guide tube 38. Since the guide tube 38 is connected from the half of the hemispherical recess 8, the recess 8 is actually a 1/4 spherical shape except for the guide tube 38.

  Then, the air swirling outside the cylindrical portion is discharged from the outer flow path 35 (flow 62). The air that has flowed into the inside of the cylindrical portion from the through hole 33 is discharged from the inner flow path 36 while making a small turn in the space in the cylindrical portion and the space in the extended portion 34 (flow 63). The air flowing into the inside of the cylindrical portion from the through-hole 33 has a considerable energy loss as compared with the air swirling outside the cylindrical portion, but in a state where no dust is accumulated in the dust container 5 Since the flow rate of air flowing into the inside of the cylindrical portion from the hole 33 is considerably smaller than the flow rate of air swirling outside the cylindrical portion, energy loss is small as a whole.

  FIG. 17 (a) is a perspective view of the dust separator of Example 2 of the present invention as viewed from the front, and FIG. 17 (a) is the dust separator of Example 2 of the present invention as viewed from the right side. It is a side view. An arrow in FIG. 17 indicates a contact range between the axial tip of the cylindrical portion 57 and the outlet end of the inlet pipe 3. The semicircular axial tip of the cylindrical portion 57 is in contact with the outlet end of the inlet pipe 3. Due to the problem of assembly accuracy, the axial front end portion of the cylindrical portion 57 and the outlet end portion of the inlet pipe 3 may not be completely in contact with each other, and there may be a slight gap (1 mm or less). However, if there is a gap, air leaks, energy loss increases, and noise increases. Therefore, when the axial tip of the cylindrical portion 57 and the outlet end of the inlet tube 3 are hermetically sealed, packing (seal member) is provided between the axial tip of the cylindrical portion 57 and the outlet end of the inlet tube 3. ) May be interposed.

  On the other hand, as shown in the enlarged sectional view, a step is formed along the axial front end of the guide tube 38 over the entire length of the axial front end of the guide tube 38 inside the axial end surface of the outer cylinder 7. If the thickness of the axial end face of the outer cylinder 7 is D2, and the thickness of the inner peripheral side of the axial end face of the outer cylinder 7 corresponding to the axial tip of the guide tube 38 is D3, then D2> D3. Therefore, the step (D3-D2) is generated. For example, D2 is about 3 mm, and D3 is about 2 mm. Therefore, the step is about 1 mm. Therefore, the inner side of the axial end surface of the outer cylinder 7 is thinner on the inner peripheral side than the portion corresponding to the distal end portion of the guide tube 38 in the axial direction. Then, as shown in the enlarged cross-sectional view, the inner cylinder 6 and the outer cylinder 7 are combined so that the tip end portion in the axial direction of the guide tube 38 abuts on the step. Since this step has a sealing function between the inner side of the axial end surface of the outer cylinder 7 and the tip end portion of the guide tube 38 in the axial direction, this step can reduce energy loss of air or noise. The processing accuracy and assembly accuracy are poor, the electric blower 28 is operated, the inner cylinder 7 is sucked to the dust container 5 side, and the axial tip of the guide tube 38 is located on the axial end surface of the outer cylinder 6. Even in the case where it does not completely contact the inside, the step can suppress air leakage. Since the thickness of the axial tip portion of the guide tube 38 is smaller than the thickness D1 of the cylindrical tip portion 57 in the axial direction, it is difficult to form a sealing member such as a packing. Is preferably realized. The inlet pipe 3 is preferably formed integrally with the outer cylinder 6.

  On the inner peripheral surface (side wall surface) of the outer cylinder 7 and on the side close to the axial end surface (upper surface) of the outer cylinder 7 and from the outlet opening of the guide tube 38 to the inlet opening of the outer flow path 35. In the meantime, the current plate 102 (ribs, blades) is formed. The formation position of the rectifying plate 102 may be near the center between the outlet opening of the guide tube 38 and the inlet opening of the outer flow path 35, or may be closer to the outlet opening side of the guide tube 38 than the center. The rectifying plate 102 has a plate shape and is formed to extend in the circumferential direction. The length of the current plate 102 in the circumferential direction is extremely smaller than the distance from the outlet opening of the guide tube 38 to the inlet opening of the outer flow path 35. As shown in FIG. 17B, the direction in which the rectifying plate 102 is formed is the direction from the position where the rectifying plate 102 is formed toward the inlet opening of the outer flow path 35. There may be one current plate 102 or a plurality of current plates. There is a large gap between the current plate 102 and the extended portion 34, and air naturally flows through this large gap. There is also a small gap between the rectifying plate 102 and the inside of the axial end surface of the outer cylinder 7, and air flows through this large gap. Since a small gap is formed between the current plate 102 and the inner side of the axial end surface of the outer cylinder 7 to form an air flow, a flow is generated on both surfaces of the current plate 102. Generation of turbulent flow at the downstream end can be suppressed. The rectifying plate 102 can direct the swirl flow toward the inlet opening of the outer flow path 35. Therefore, the air flowing in from the guide tube 38 is guided to the outer flow path 35 without rotating in the outer cylinder 7 many times, so that energy loss of air can be reduced. Further, since it is formed not on the inner peripheral side (the outer peripheral surface of the inner cylinder 7) with a slow flow velocity but on the outer peripheral side (the inner peripheral surface of the outer cylinder 6) with a higher flow velocity, even if the shape of the rectifying plate 102 is small, the swirl Has the effect of turning. Since the current plate 102 can be made small, the turbulence of the air flow can be reduced, and the energy loss of the air can be reduced.

  According to the second embodiment of the present invention, the concave portion 8 is formed at the distal end portion of the inner cylinder 7 so as to have a turning function, whereby the axial length of the dust collector 2 can be shortened, and the cleaner body 1 Can be made compact.

  The present invention is applicable to a vacuum cleaner.

DESCRIPTION OF SYMBOLS 1 Vacuum cleaner main body 2 Dust collector 3 Inlet pipe 4 Dust separation part 5 Dust accommodating part 6 Outer cylinder 7 Inner cylinder 8 Recessed part 9, 22, 25 Packing 10 Case 11 Front cover 12 Dust collection basket 13, 14, 31, 32 Shafts 15, 29 Filters 16, 37, 53 Handle 17 Button 18 Transmission rod 20 Hose joint pipe 21 Main body inlet 23 Caster support 24 Dust remover 26 Auxiliary filter 27 Inlet duct 28 Electric blower 30 Main body outlet 33 Through hole 34 Extension 35 Outer channel 36 Inner channel 38 Guide tube 39 Recess 40 Exhaust duct 50 Suction tool 51 Joint tube 52 Operation tube 54 Hose 55 Wheel 56 Upper cover 57 Column portion 58 Frustum portion 59 Guide tube end portion 60 Circumferential direction base Portion 61 Circumferential tip 62, 63, 64 Flow 65 Downstream side wall surface 66 Upstream side wall surface 67 Screw 68, 69 Lip 100 Portion 101 Inner wall 102 rectifying plate side channels

Claims (5)

In a vacuum cleaner provided with a vacuum cleaner body provided with an electric blower, and a dust collector detachably attached to the vacuum cleaner body,
The dust collector includes an inner cylinder having a plurality of through holes on the circumferential surface,
One end in the axial direction of the inner cylinder is closed, the other end in the axial direction of the inner cylinder is opened and communicated to the electric blower side,
One end in the axial direction of the inner cylinder is formed at a position facing the outlet side opening of the inlet pipe of the dust collector,
One end of the inner cylinder in the axial direction is configured to swirl the air sucked from the inlet pipe of the dust collector in the circumferential direction. In a vacuum cleaner provided with a vacuum cleaner body provided with an electric blower, and a dust collector detachably attached to the vacuum cleaner body,
The dust collector includes an inner cylinder having a plurality of through holes on the circumferential surface,
One end in the axial direction of the inner cylinder is closed, the other end in the axial direction of the inner cylinder is opened and communicated to the electric blower side,
One end in the axial direction of the inner cylinder is formed at a position facing the outlet side opening of the inlet pipe of the dust collector,
The electric vacuum cleaner characterized in that the closed portion at one end in the axial direction of the inner cylinder has a shape having a function of turning air sucked from an inlet pipe of the dust collector in a circumferential direction. In a vacuum cleaner provided with a vacuum cleaner body provided with an electric blower, and a dust collector detachably attached to the vacuum cleaner body,
The dust collector includes an inner cylinder having a plurality of through holes on the circumferential surface,
One end in the axial direction of the inner cylinder is closed, the other end in the axial direction of the inner cylinder is opened and communicated to the electric blower side,
One end in the axial direction of the inner cylinder is formed at a position facing the outlet side opening of the inlet pipe of the dust collector,
The closing portion at one end in the axial direction of the inner cylinder has a shape recessed inward in the axial direction of the inner cylinder,
The vacuum cleaner characterized in that a part of the recessed shape opens in a circumferential surface of the inner cylinder. The vacuum cleaner of claim 3,
A guide tube having one end communicating with the opening of the circumferential surface of the concave inner cylinder;
The other end of the guide tube is opened toward the circumferential direction of the outer peripheral surface of the inner cylinder. The vacuum cleaner of claim 3 ,
A part of the outer side of the inner cylinder opens in the axial direction,
The vacuum cleaner characterized in that the wall surface on the downstream side in the circumferential direction of the opening on the outer side of the inner cylinder is higher than the wall surface on the upstream side in the circumferential direction of the opening on the outer side of the inner cylinder .

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