Electric cleaner

Abstract

To provide an electric cleaner in which the dust flown through a flow passage extending into a dust collection container can be centrifugally separated.SOLUTION: An electric cleaner includes: a cleaner body 10 having an electric fan; a dust collection container 40 detachable from and attachable to the cleaner body 10 and having a dust collection space 42; and a structure 80 detachable from and attachable to the dust collection container 40 and includes a dust collection space 42 between the dust collection container 40. In the dust collection container 40, a pipe part 60 communicating with an air suction port extends from a bottom side toward the structure 80 side. The structure 80 includes: a discharge port 112 for discharging the air from the pipe part 60 into the dust collection space 42; and an inflow port 84 into which the air discharged from the dust collection space 42 flows. The structure 80 is connected to the pipe part 60 in a detachable / attachable manner.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a vacuum cleaner. [Background technology]

[0002] Conventionally, electric vacuum cleaners have been provided, such as the rechargeable vacuum cleaner disclosed in Patent Document 1. The rechargeable vacuum cleaner in Patent Document 1 has a vacuum cleaner main body with a built-in electric blower consisting of a fan and a motor that drives the fan, a dust collection case that is detachably connected to the vacuum cleaner main body and has an internal filter that collects dust, and a deformable, plate-shaped battery pack that serves as the motor's power source is wound around the outer periphery of the motor. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Jikko No. 62-10850 Summary of the Invention [Problem to be solved by the invention]

[0004] The rechargeable vacuum cleaner of Patent Document 1 includes a support plate provided inside the dust collection case, a filter fixed to the support plate, and a dust collection case having a suction port extending inward, and is capable of collecting dust in the dust collection case that is taken in through the suction port. However, the rechargeable vacuum cleaner of Patent Document 1 leaves room for improvement in that it cannot separate relatively small and large dust particles by centrifugal separation.

[0005] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a vacuum cleaner capable of centrifuging dust that has flowed in from a flow path extending inside a dust container. [Means for solving the problem]

[0006] The electric vacuum cleaner of the present invention, which is provided to solve the above-mentioned problems, comprises a vacuum cleaner body having an electric blower that generates suction force, a dust collection container that is detachable from the vacuum cleaner body and has a dust collection space for collecting dust sucked through a suction port by the electric blower, and a structure that is detachable from the dust collection container and forms the dust collection space between the dust collection container and the structure, wherein the dust collection container has a pipe section that communicates with the suction port and extends from the bottom side toward the structure, and the structure has an outlet for discharging air from the pipe section into the dust collection space and an inlet through which air discharged from the dust collection space flows in, and is detachably connected to the pipe section.

[0007] In the vacuum cleaner of the present invention, the tube connected to the suction port extends from the bottom of the dust container toward the structure. Therefore, the vacuum cleaner of the present invention can discharge dust-laden air introduced through the tube from an outlet provided in the structure toward the dust collection space formed between the dust container and the structure. This allows the vacuum cleaner to centrifuge dust that has flowed in from the flow path extending into the dust container. [Effects of the Invention]

[0008] According to the present invention, it is possible to realize a vacuum cleaner capable of centrifuging dust that has flowed in from a flow path extending inward of a dust collection container. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a side view showing an electric vacuum cleaner according to an embodiment of the present invention. [Figure 2] FIG. 2 is an exploded perspective view of a vacuum cleaner body that constitutes the electric vacuum cleaner of FIG. 1. [Figure 3] 2 is a cross-sectional view of a vacuum cleaner body constituting the electric vacuum cleaner of FIG. 1. FIG. [Figure 4] FIG. 4 is an enlarged cross-sectional view of a portion surrounded by a two-dot chain line in FIG. 3. [Figure 5]2 is a cross-sectional view showing a state in which a cleaner body constituting the electric vacuum cleaner of FIG. 1 is viewed in cross section along a plane intersecting an axial direction. FIG. [Figure 6] FIG. 2 is a front view showing a structure used in the vacuum cleaner of FIG. 1. [Figure 7] FIG. 2 is a perspective view showing a structure used in the vacuum cleaner of FIG. 1. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an electric vacuum cleaner 1 according to one embodiment of the present invention will be described in detail with reference to the drawings. In the following description, the overall configuration of the electric vacuum cleaner 1 will be briefly described, followed by a more detailed description of the main parts. In the following description, unless otherwise specified, positional relationships in the up-down direction, front-rear direction, left-right direction (width direction), etc. will be described based on the state in which the electric vacuum cleaner 1 is set upright as shown in FIG.

[0011] As shown in Fig. 1 etc., the electric vacuum cleaner 1 is a vacuum cleaner having a stick-shaped (vertical) appearance. The electric vacuum cleaner 1 can be, for example, a rechargeable type or a type that obtains power from an external power source via a power cord. As shown in Fig. 1, the electric vacuum cleaner 1 includes a vacuum cleaner main body 10, a handle unit 20, a dust collecting device 30, an extension tube 180, and a suction tool 190.

[0012] The vacuum cleaner main body 10 forms the main body of the electric vacuum cleaner 1 and is the part that exerts suction power and performs the function of collecting dust. Specifically, as shown in Fig. 3, the vacuum cleaner main body 10 includes, inside a main body case 12 that forms a housing, an electric blower 14 for sucking air and generating an airflow, a filter 15, a battery 16, a circuit board 18, and other parts.

[0013] As shown in FIG. 3, electric blower 14 is housed in a region (blower housing region 10b) on the dust collection container connection region 10a side of main body case 12 constituting vacuum cleaner body 10, which is connected to dust collecting device 30. Electric blower 14 is housed with its suction port facing the dust collection container connection region 10a side. Filter 15 is provided in dust collection container connection region 10a, which is the suction port side of electric blower 14. Therefore, electric blower 14 can suck air from the dust collection container connection region 10a side through filter 15. An exhaust port 10c is provided in the portion of main body case 12 constituting blower housing region 10b where electric blower 14 is located. Therefore, in vacuum cleaner body 10, air sucked in by operating electric blower 14 passes through filter 15 and is purified, then enters dust collection container connection region 10a and is discharged from exhaust port 10c.

[0014] The battery 16 is accommodated in a battery accommodating area 10d located away from the dust collection container connection area 10a in the vacuum cleaner body 10. In this embodiment, the interior of the part of the body case 12 where the handle portion 20 is formed is the battery accommodating area 10d, and the battery 16 is accommodated inside the battery accommodating area 10d.

[0015] The circuit board 18 is housed in a circuit board housing section 10e provided in an area between the area where the dust collection container connection area 10a is provided and the battery housing area 10d in the main body case 12. The circuit board 18 houses a circuit board provided for driving electronic components, a circuit board on which components constituting the operation section 22 provided in the handle section 20 are mounted, and the like.

[0016] The handle portion 20 is a portion provided to allow a user of the vacuum cleaner 1 to grip the vacuum cleaner body 10. The handle portion 20 may have an opening for inserting a hand, but in this embodiment is formed by a bar-shaped portion extending from the upper end of the vacuum cleaner body 10. The handle portion 20 is provided so as to slope from the front side to the back side of the vacuum cleaner body 10 as it approaches the tip. In addition, an operating portion 22 is provided on the handle portion 20 at the front side of the vacuum cleaner body 10. This makes it possible to operate the operating portion 22 while gripping the handle portion 20.

[0017] The dust collecting device 30 is a part that collects and stores dust sucked by the electric vacuum cleaner 1. The dust collecting device 30 is detachable from the vacuum cleaner body 10. The dust collecting device 30 is provided so as to be continuous with the vacuum cleaner body 10. Specifically, the dust collecting device 30 is arranged so as to be aligned with the electric blower 14 in the axial direction (vertical direction) of the vacuum cleaner body 10. Here, the handle unit 20 side of the vacuum cleaner body 10 is on the upper side in the vertical direction, and a suction port 52 (described below) is on the lower side in the vertical direction. The dust collecting device 30 is a cyclone-type dust collecting device that can centrifuge at least a portion of dust from the air sucked in by the operation of the electric blower 14. Details of the dust collecting device 30 will be described later.

[0018] 1, extension tube 180 is a tubular member that detachably connects vacuum cleaner body 10 and suction tool 190. One end of extension tube 180 can be inserted into suction port 52 for connection, and the other end can be connected to suction tool 190. By connecting vacuum cleaner body 10 and suction tool 190 via extension tube 180, a continuous, communicating path (air passage) can be formed from suction tool 190 to vacuum cleaner body 10.

[0019] Suction tool 190 is connected directly to suction port 52 provided in suction unit 50, or indirectly via extension pipe 180. As shown in FIG. 1 , suction tool 190 has suction portion 192 and joint portion 194. Suction portion 192 opens toward the bottom. In addition, joint portion 194 is connectable to suction port 52 provided in suction unit 50 or extension pipe 180.

[0020] The electric vacuum cleaner 1 has roughly the above-described configuration. The characteristic parts of the electric vacuum cleaner 1 will be described in more detail below.

[0021] As described above, the dust collecting device 30 is for collecting dust sucked by the electric blower 14. The dust collecting device 30 is detachable from the vacuum cleaner body 10, and can be attached and detached below the electric blower 14 in the vertical direction. As shown in FIGS. 2 and 4, the dust collecting device 30 includes a dust collection container 40 and a structure 80.

[0022] The dust collection container 40 is a container having a dust collection space 42 for collecting dust. The dust collection container 40 is a cylindrical container with a closed bottom 44 and an open end, with an opening 46 at the end opposite the bottom 44 in the axial direction (the upper end in the illustrated example). The suction unit 50, which will be described in detail later, is attached to the bottom 44 of the dust collection container 40. The bottom 44 also has a pipe insertion hole 48 for inserting a pipe 60. In this embodiment, the pipe insertion hole 48 is provided so as to open at a position that is off the axial center of the dust collection container 40 (the center of the bottom 44). However, the center of the bottom 44 may also be open. Since the bottom 44 of the dust collection container 40 is closed, dust collected in the dust collection space 42 can be disposed of through the opening 46. Therefore, the opening 46 functions as a disposal port for the dust collection container 40.

[0023] The suction unit 50 has a suction port 52 and a bottom engagement portion 54. The suction unit 50 is used while attached to the bottom 44 of the dust collection container 40. The suction port 52 is an opening provided for sucking dust. When the suction unit 50 is attached to the dust collection container 40, the tube portion 60 is inserted into the tube insertion hole 48 provided in the bottom 44 of the dust collection container 40. The suction port 52 can suck dust as is, but it can also be used by connecting the extension tube 180 or suction tool 190 described above. The bottom engagement portion 54 is a portion that engages with the bottom 44 of the dust collection container 40. In this embodiment, the bottom engagement portion 54 is formed into a concave shape that can fit into the bottom 44 side portion of the dust collection container 40. By fitting and engaging the bottom 44 side portion of the dust collection container 40, the bottom engagement portion 54 conforms to the bottom 44. The dust collection container 40 and the suction part 50 may be fixed together with a fixing device after the bottom engaging part 54 is engaged with the part on the bottom 44 side of the dust collection container 40. The fixing device may be, for example, a screw.

[0024] As shown in FIGS. 2 and 3 , in this embodiment, the pipe portion 60 is integrally formed with the suction portion 50. The pipe portion 60 is a cylindrical member extending in a direction (vertical direction) intersecting (orthogonal in the illustrated example) the bottom portion 44 (bottom engaging portion 54). Here, in a modified example, the pipe portion 60 can be formed as a separate member from the suction portion 50. In this case, the pipe portion insertion hole 48 is not provided, and the pipe portion 60 only needs to protrude from the bottom portion 44 of the dust collection container 40 toward (upward) the opening 46 (structure 80). The pipe portion 60 has a portion (first pipe portion 62) that protrudes toward (upward) the opening 46 (structure 80) and a portion (second pipe portion 64) that protrudes away from the dust collection container 40. The first pipe portion 62 and the second pipe portion 64, which has the suction port 52, are in communication with each other. In this embodiment, the first pipe portion 62 and the second pipe portion 64 are integrally formed as the suction portion 50. In a modified example, the first pipe portion 62 may be configured integrally as a part of the dust collection container 40, and the second pipe portion 64 may be configured integrally as a part of the suction unit 50. In the configuration of the pipe portion 60 of this embodiment, the gap between the structure 80 and the pipe portion 60 is sealed, and in the configuration of the pipe portion 60 of the modified example, it is preferable that in addition to sealing the gap between the structure 80 and the pipe portion 60, the gap between the dust collection container 40 and the suction unit 50 is also sealed. In addition, such sealing may be performed by a sealing member.

[0025] In this embodiment, the first pipe portion 62 is a portion that is inserted into a pipe portion insertion hole 48 provided in the bottom portion 44 of the dust collection container 40. Therefore, the first pipe portion 62 is provided so as to penetrate the bottom portion 44 of the dust collection container 40 and extend toward a structure 80 disposed inside the dust collection container 40, as will be described in detail later. When attached to the dust collection container 40, the first pipe portion 62 (pipe portion 60) extends to a position that is greater than or equal to one-third and less than two-thirds of the length of the dust collection container 40 in the axial direction of the dust collection container 40. Additionally or alternatively, when attached to the dust collection container 40, the first pipe portion 62 (pipe portion 60) extends to a position that is greater than or equal to one-third and less than two-thirds of the length of the dust collection space 42 in the axial direction of the dust collection container 40. With this configuration, it is possible to prevent dust in the dust collection space 42 from flowing back via the pipe portion 60. More specifically, not only can it reduce the backflow of dust in the dust collection space 42 from the exhaust outlet 112, but it can also reduce the backflow (falling) of dust in the dust collection space 42 from the pipe section 60 when the structure 80 is removed from the pipe section 60.

[0026] In this embodiment, the second pipe portion 64 is a portion provided so as to protrude on the opposite side of the bottom engaging portion 54 from the first pipe portion 62. The end opening of the second pipe portion 64 functions as the suction port 52 described above.

[0027] The structure 80 has the appearance shown in Figures 6, 7, etc. The structure 80 is a member that is detachably attached to the pipe portion 60 inside the dust collection container 40. The structure 80 is also a member that is provided inside the dust collection device 30, thereby forming the dust collection space 42 between the structure 80 and the dust collection container 40. The structure 80 is configured to provide an inlet 84, a passage 86, a space 88, etc., for an inner tube 82. The inner tube 82 is also configured to include a first inner tube 90, a second inner tube 92, an enlarged portion 94, and a flange portion 96.

[0028] The first inner cylinder 90 is cylindrical and is a portion that is located on the vacuum cleaner body 10 side when the dust collecting device 30 is connected to the vacuum cleaner body 10. A filter 15 is disposed in the first inner cylinder 90. When the dust collecting device 30 is attached to the vacuum cleaner body 10, the first inner cylinder 90 is connected in abutting contact with the dust collection container connection area 10a of the vacuum cleaner body 10. Therefore, the inner cylinder 82 can be connected to the dust collection container connection area 10a via the first inner cylinder 90.

[0029] The second inner cylinder 92 is cylindrical and radially smaller than the first inner cylinder 90. When the structure 80 is installed in the dust collection container 40, the second inner cylinder 92 is located closer to the pipe portion 60 (bottom portion 44) than the first inner cylinder 90.

[0030] The expanded portion 94 is located between the first inner tube 90 and the second inner tube 92 and connects them. The expanded portion 94 is formed in a tapered shape. The expanded portion 94 is provided so as to expand radially outward from the second inner tube 92 toward the first inner tube 90. In addition, the flange portion 96 is provided so as to continue to the end of the second inner tube 92 on the opposite side from the first inner tube 90 and the expanded portion 94 (toward the bottom 44 when installed inside the dust collection container 40).

[0031] The flange portion 96 has a tapered shape that increases in diameter as it moves away from the second inner tube 92 (as it moves closer to the bottom 44 when installed inside the dust collection container 40). As a result, the flange portion 96 is disposed inside the dust collection container 40 in an umbrella-like shape that opens toward the bottom 44. The flange portion 96 has the effect of suppressing dust that has accumulated inside the dust collection space 42 from flying up and adhering to the inlet 84, which will be described later.

[0032] The inlet 84 is an opening that communicates with a space 88 provided inside the structure 80, as will be described in detail later, and filters the air inside the dust collection space 42. As shown in FIG. 7 and other figures, the inlet 84 is provided in an inlet region 100 that forms a part of the circumferential direction of the second inner cylinder 92. The size of the opening region of the inlet region 100 is adjusted to prevent dust exceeding a predetermined size from passing through. A plurality of inlets 84 are provided in the inlet region 100. The inlet region 100 may be a resin molded part or a mesh filter.

[0033] The passage 86 is configured as a space formed in the structure 80 so as to be connected to the pipe portion 60 and thereby communicate with the structure 80. The passage 86 is formed in a cylindrical shape inside the second inner cylinder 92 in the structure 80, but may extend toward the first inner cylinder 90 so as to be positioned inside the first inner cylinder 90 as well. The passage 86 is provided so that one end thereof opens downward in the second inner cylinder 92 (toward the bottom 44 when installed inside the dust collection container 40) and the other end thereof opens at the periphery of the second inner cylinder 92. The opening at one end of the passage 86 (the opening opening toward the bottom 44) functions as a pipe connection port 110 for connecting the pipe portion 60. Furthermore, the opening at the other end of the passage 86 (the opening formed at the periphery of the second inner cylinder 92) functions as an outlet port 112 for discharging air introduced into the passage 86 from the pipe portion 60 toward the dust collection space 42. The passage 86 has inner surfaces: a first inner surface 120, a second inner surface 122, and an upper surface 124.

[0034] The first inner surface 120 and the second inner surface 122 are parts of the inner surface that form a passage shaped to be recessed toward the center of the inner cylinder 82 relative to the outlet 112, as shown in Fig. 5, and are opposed to each other about the axis C1 of the inner cylinder 82. The first inner surface 120 is a surface that extends from the radially outer side of the inner cylinder 82 (second inner cylinder 92) along the center direction and expands in the axial direction of the inner cylinder 82 in a cross section (hereinafter also referred to as a "transverse cross section") of the structure 80 (inner cylinder 82) cut by a cutting plane that expands in a direction intersecting the axial direction of the structure 80 (inner cylinder 82) (a direction perpendicular to the axis in the illustrated example), as shown in Fig. 5. The first inner surface 120 has a first guide portion 126. The first guide portion 126 is a curved portion that, when viewed (transverse cross section) from the axial direction of the passage 86 (inner cylinder 82), is closer to the outlet 112 than the central axis (structure axis position C1) of the structure 80, and that curves so that the outlet 112 expands in the circumferential direction of the passage 86. The first guide portion 126 is formed so as to bend radially outward from the first inner surface 120.

[0035] The second inner surface 122 has a curved surface 128 that is convex radially outward of the structure 80 (inner tube 82) when viewed (in a cross section) from the axial direction of the passage 86 (inner tube 82). The second inner surface 122 has a second guide portion 130. The second guide portion 130 is a curved portion that is closer to the outlet 112 than the central axis (structure axis position C1) of the structure 80 (inner tube 82) and that curves so that the outlet 112 expands in the circumferential direction of the structure 80 (inner tube 82). In other words, the second guide portion 130 extends from an inflection portion (bend portion) on the second inner surface 122 away from the axis C1 of the inner tube 82. The second guide portion 130, the outlet 112, and the first guide portion 126 are arranged in this order in the swirling direction of the airflow.

[0036] The upper surface 124 is a surface that forms a portion that faces the pipe connection port 110 of the passage 86 in the axial direction of the structure 80 (inner cylinder 82). Therefore, the upper surface 124 is a surface against which air that is introduced into the passage 86 from the pipe connection port 110 and moves in the axial direction of the structure 80 (inner cylinder 82) collides. The upper surface 124 is configured by a surface (a curved surface in the illustrated example) that includes a curved shape that bends toward the radially outer side of the passage 86 (the discharge port 112 side) as it moves away from the pipe 60 (pipe connection port 110), or a shape that slopes toward the radially outer side (the discharge port 112 side) as it moves away from the pipe 60 (pipe connection port 110). This slope direction is a direction away from the pipe 60. As a result, the passage 86 has a shape that curves toward the discharge port 112, with the portion where the upper surface 124 is provided as a boundary.

[0037] The space 88 is a hollow region formed between the circumferential surface of the inner cylinder 82 and the passage 86. In this embodiment, the space 88 is a hollow region formed between the circumferential surface of the second inner cylinder 92 and the passage 86, but may also exist on the first inner cylinder 90 side. The space 88 is a region through which air flows from the dust collection space 42 through the inlet 84. The space 88 is open toward the upper side (first inner cylinder 90) of the inner cylinder 82. As described above, when the dust collecting device 30 is connected to the vacuum cleaner body 10, the first inner cylinder 90 is connected to the vacuum cleaner body 10 in abutting contact therewith. Therefore, air flowing from the dust collection space 42 into the space 88 through the inlet 84 is sucked into the electric blower 14 via the first inner cylinder 90 and the filter 15 disposed in the dust collection container connection region 10a, and then discharged from the exhaust port 10c.

[0038] The vacuum cleaner 1 can be configured with the structure 80 disposed inside the dust collection space 42 by connecting the first pipe section 62 of the pipe section 60, which protrudes from the bottom 44 of the dust collection container 40 constituting the dust collecting device 30 into the dust collection space 42, to the pipe section connection port 110 provided at the end of the passage 86 constituting the structure 80. The vacuum cleaner 1 can be assembled for use by connecting the dust collecting device 30 with the structure 80 disposed therein to the dust collection container connection area 10a of the vacuum cleaner body 10. In the assembled state, the vacuum cleaner 1 can suck air containing dust through the suction port 52 by operating the electric blower 14. The dust and air sucked through the suction port 52 flow into the passage 86 of the structure 80 via the pipe section 60 and are discharged into the dust collection space 42 through the discharge port 112 provided at the end of the passage 86. The dust and air discharged from the outlet 112 form a swirling flow that flows along the inner circumferential surface of the dust collection container 40. As a result, the dust contained in the air forming the swirling flow is centrifuged and becomes accumulated around the pipe portion 60 in the dust collection space 42.

[0039] Here, in the dust collecting device 30, when the structure 80 is assembled inside the dust collecting container 40 as described above, as shown in FIG. 5 and other figures, the center of the discharge port 112 (discharge port center C3) is located at a position offset to one circumferential side of the structure 80 (inner cylinder 82) with respect to the center of the structure 80 (structure axis position C1) or the position through which the center of the passage 86 passes (passage axis position C2), as viewed from the central axis direction of the structure 80. Furthermore, the position through which the central axis of the passage 86 passes (passage axis position C2) is located at a position offset radially outward (in this embodiment, a position closer to the discharge port 112) with respect to the position through which the central axis of the structure 80 passes (structure axis position C1). Furthermore, when viewed from the axial direction, the passage 86 is located inside the inner cylinder 82, and a space 88 through which air flowing in from the inlet 84 flows is located between the circumferential surface of the inner cylinder 82 (the second inner cylinder 92 in the illustrated example) and the passage 86. In this embodiment, space 88 is formed in a C-shape when viewed (in cross section) from the axial direction of passage 86 (inner cylinder 82). Space 88 is also provided around passage 86 in cross section. Air from which dust has been centrifuged in dust collection space 42 as described above flows into space 88 via inlet 84. The air that flows into space 88 from dust collection space 42 via inlet 84 passes through filter 15 provided in dust collection container connection area 10a of vacuum cleaner body 10, flows into blower accommodating area 10b, and is then discharged to the outside of vacuum cleaner body 10 from exhaust port 10c.

[0040] Furthermore, by removing dust collecting device 30 from vacuum cleaner body 10, dust accumulated inside dust collection space 42 can be disposed of through opening 46 provided on the upper end side (opposite bottom 44) of dust collection container 40. In this way, vacuum cleaner 1 makes it easy to dispose of dust because dust can be disposed of through wide opening 46 rather than through bottom 44 side of dust collection container 40.

[0041] <<Effects obtained by vacuum cleaner 1>> The effects and the like obtained by the vacuum cleaner 1 exemplified in each of the above-described embodiments will be described below for each aspect of the present invention.

[0042] [First aspect of the present invention] Electric vacuum cleaners have been provided in the past, such as the rechargeable vacuum cleaner disclosed in Japanese Utility Model Publication No. 62-10850. The rechargeable vacuum cleaner in Patent Document 1 has a vacuum cleaner main body with a built-in electric blower consisting of a fan and a motor to drive the fan, a dust collection case that is detachably connected to the vacuum cleaner main body and has an internal filter for collecting dust, and a deformable, plate-shaped battery pack that serves as the motor's power source is wound around the motor's outer periphery.

[0043] The rechargeable vacuum cleaner of Patent Document 1 includes a support plate provided inside the dust collection case, a filter fixed to the support plate, and a dust collection case having a suction port extending inward, and is capable of collecting dust in the dust collection case that is taken in through the suction port. However, the rechargeable vacuum cleaner of Patent Document 1 leaves room for improvement in that it cannot separate relatively small and large dust particles by centrifugal separation.

[0044] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a vacuum cleaner capable of centrifuging dust that has flowed in from a flow path extending inside a dust container.

[0045] (1-1) The electric vacuum cleaner 1 of the present invention comprises a vacuum cleaner body 10 having an electric blower 14 that generates suction force, a dust collection container 40 that is detachable from the vacuum cleaner body 10 and has a dust collection space 42 for collecting dust sucked through a suction port by the electric blower 14, and a structure 80 that is detachable from the dust collection container 40 and forms the dust collection space 42 between the dust collection container 40 and the structure 80, wherein the dust collection container 40 has a pipe section 60 that communicates with the suction port 52 and extends from the bottom side toward the structure 80, and the structure 80 has an outlet 112 for discharging air from the pipe section 60 into the dust collection space 42 and an inlet 84 through which air discharged from the dust collection space 42 flows in, and is detachably connected to the pipe section 60.

[0046] In the vacuum cleaner 1 of the present invention, the pipe section 60 communicating with the suction port 52 extends from the bottom side of the dust collection container 40 toward the structure 80. Therefore, the vacuum cleaner 1 of the present invention is capable of discharging the dust-containing air introduced via the pipe section 60 from the outlet 112 provided in the structure 80 toward the dust collection space 42 formed between the dust collection container 40 and the structure 80. This allows the vacuum cleaner 1 to centrifuge the dust that has flowed in from the flow path extending inside the dust collection container 40.

[0047] Furthermore, in the vacuum cleaner 1 of the present invention, the structure 80 and the pipe portion 60 are detachably connected. Therefore, in the vacuum cleaner 1, the dust can be disposed of from the dust collection container 40 in a state where the structure 80 is detached and separated from the pipe portion 60. Therefore, by configuring the vacuum cleaner 1 as described above in (1-1), the dust collected in the dust collection container 40 can be easily disposed of.

[0048] (1-2) In the electric vacuum cleaner 1 according to (1-1) above, the tube portion 60 may be characterized in that it extends to a position between 1 / 3 and 2 / 3 of the length of the dust collection container 40 in the axial direction of the dust collection container 40.

[0049] By configuring the vacuum cleaner 1 of the present invention as described above in (1-2), the discharge port 112 of the structure 80 can be disposed at a position away from the bottom side of the dust collection container 40. This allows the vacuum cleaner 1 to prevent dust in the dust collection space 42 from flowing back through the pipe part 60.

[0050] (1-3) In the electric vacuum cleaner 1 according to (1-1) or (1-2) above, the tube portion 60 may be characterized in that it extends to a position that is more than 1 / 3 and less than 2 / 3 of the dust collection space 42 in the axial direction of the dust collection container 40.

[0051] By configuring the vacuum cleaner 1 of the present invention as described above in (1-3), the discharge port 112 of the structure 80 can be disposed at a position away from the bottom side of the dust collection container 40. This allows the vacuum cleaner 1 to prevent dust in the dust collection space 42 from flowing back through the pipe part 60.

[0052] (1-4) The vacuum cleaner 1 according to any one of (1-1) to (1-3) above may be characterized in that dust accumulates around the pipe portion 60 in the dust collection space 42.

[0053] By configuring the vacuum cleaner 1 of the present invention as described above in (1-4), the dust collected by centrifugation can be collected around the pipe part 60 on the bottom side of the dust container 40 relative to the structure 80.

[0054] (1-5) In the electric vacuum cleaner 1 according to any one of (1-1) to (1-4) above, the structure 80 may have the discharge outlet 112 and a passage 86 connected to the pipe portion 60, and the center of the discharge outlet 112 may be located at a position offset to one side of the circumferential direction of the structure 80 from the center of the structure 80 or the center of the passage 86, as viewed from the central axis direction of the structure 80.

[0055] By adopting the configuration described above in (1-5), the vacuum cleaner 1 of the present invention makes it easier for the dust-laden airflow that flows through the passage 86 provided in the structure 80 and is discharged from the outlet 112 to hit the inner circumferential surface of the dust container 40 at an angle. This makes it easier for the vacuum cleaner 1 to form a swirling flow along the inner circumferential surface of the dust container 40. Therefore, by adopting the configuration described above in (1-5), the vacuum cleaner 1 can further improve its ability to centrifuge dust from the air (centrifugal separation ability).

[0056] (1-6) In the electric vacuum cleaner 1 according to any one of (1-1) to (1-5) above, the structure 80 may have the discharge outlet 112 and a passage 86 communicating with the pipe portion 60, the inner surface of the passage 86 having a first inner surface 120 and a second inner surface 122 extending along the axial direction of the passage 86, and the second inner surface 122 may have a curved surface 128 that is convex radially outward of the passage 86 when viewed from the axial direction of the passage 86.

[0057] By being configured as described above in (1-6), the vacuum cleaner 1 of the present invention can pass the dust-containing airflow that has flowed through the passage 86 provided in the structure 80 between the first inner surface 120 and the second inner surface 122 and discharge it from the outlet 112 into the dust container 40. Furthermore, if the second inner surface 122 has a curved surface 128 that is convex radially outward of the passage 86 as described above in (1-6), a swirling flow is easily generated by the air that is discharged from the outlet 112 along the curved surface 128. Therefore, by being configured as described above in (1-6), the vacuum cleaner 1 of the present invention can further improve its ability to centrifuge dust from the air (centrifugal separation ability).

[0058] (1-7) In the electric vacuum cleaner 1 according to any one of (1-1) to (1-6) above, the structure 80 may have the discharge outlet 112 and a passage 86 communicating with the pipe portion 60, the inner surface of the passage 86 having a first inner surface 120 and a second inner surface 122 extending along the axial direction of the passage 86, and the first inner surface 120 may have a first guide portion 126 that curves so that the discharge outlet 112 expands in the circumferential direction of the passage 86 on a side closer to the discharge outlet 112 than the central axis of the structure 80 when viewed from the axial direction of the passage 86.

[0059] By adopting the configuration described in (1-7) above, the vacuum cleaner 1 of the present invention can pass a dust-laden airflow that has flowed through the passage 86 provided in the structure 80 between the first inner surface 120 and the second inner surface 122 and be discharged from the outlet 112 into the dust container 40. Furthermore, by providing the first guide portion 126, which curves so that the outlet 112 expands in the circumferential direction of the passage 86, on the first inner surface 120 on a side closer to the outlet 112 than the central axis of the structure 80, as described in (1-7) above, dust is less likely to get caught at the outlet 112, and the dust-laden airflow discharged from the outlet 112 is more likely to hit the inner circumferential surface of the dust container 40 at an angle. This makes it easier for the vacuum cleaner 1 to generate a swirling airflow inside the dust container 40. Therefore, by adopting the configuration described in (1-7) above, the vacuum cleaner 1 of the present invention can further improve its ability to centrifuge dust from air (centrifugal separation ability).

[0060] (1-8) In the electric vacuum cleaner 1 according to any one of (1-1) to (1-7) above, the structure 80 may have the discharge outlet 112 and a passage 86 communicating with the pipe portion 60, the inner surface of the passage 86 having a first inner surface 120 and a second inner surface 122 extending along the axial direction of the passage 86, and the second inner surface 122 may have a second guide portion 130 that curves so that the discharge outlet 112 expands circumferentially on the side closer to the discharge outlet 112 than the central axis of the structure 80 when viewed from the axial direction of the passage 86.

[0061] By being configured as described above in (1-8), the vacuum cleaner 1 of the present invention can pass the dust-containing airflow that has flowed through the passage 86 provided in the structure 80 between the first inner surface 120 and the second inner surface 122 and discharge it from the discharge port 112 into the dust collection container 40. Furthermore, by being configured as described above in (1-8), the second inner surface 122 is provided with the second guide portion 130 that curves so that the discharge port 112 expands in the circumferential direction of the passage 86 on the side closer to the discharge port 112 than the central axis of the structure 80, thereby making it difficult for dust to get caught at the discharge port 112. Therefore, by being configured as described above in (1-8), the vacuum cleaner 1 of the present invention can further improve its ability to centrifuge dust from the air (centrifugal separation ability).

[0062] (1-9) In the electric vacuum cleaner 1 according to any one of (1-1) to (1-8) above, the structure 80 may have a passage 86 communicating with the pipe portion 60 and an inner tube 82 having the inlet 84 on its circumferential surface, the passage 86 being located inside the inner tube 82, and a space 88 being formed between the circumferential surface of the inner tube 82 and the passage 86, through which air flowing in from the inlet 84 flows, and the central axis of the passage 86 may be located at a position radially outwardly offset from the central axis of the structure 80.

[0063] By being configured as described above in (1-9), the vacuum cleaner 1 of the present invention can enlarge the space 88 formed between the circumferential surface of the inner cylinder 82 and the passage 86. This makes it easier for the air swirling inside the dust collection container 40 to flow into the space 88 from the inlet 84. Therefore, by being configured as described above in (1-9), the vacuum cleaner 1 can reduce the air resistance when air flows into the space 88 through the inlet 84.

[0064] (1-10) The electric vacuum cleaner 1 according to any one of (1-1) to (1-9) above may be characterized in that it includes a suction section 50 having the suction port 52 and integrally formed with the pipe section 60, and the pipe section 60 penetrates the bottom of the dust collection container 40 and extends toward the structure 80.

[0065] [Second Aspect of the Present Invention] The second aspect of the present invention is an invention made to solve the same problem as the first aspect described above. (2-1) The electric vacuum cleaner 1 of the present invention comprises a vacuum cleaner body 10 having an electric blower 14 that generates suction force, a dust collection container 40 that is detachable from the vacuum cleaner body 10 and has a dust collection space 42 for collecting dust sucked through a suction port 52 by the electric blower 14, and a structure 80 that defines the dust collection space 42 between the dust collection container 40 and the structure 80. The dust collection container 40 has a pipe portion 60 that communicates with the suction port 52 and extends from the bottom side toward the structure 80. The structure 80 has an inlet 84 through which air discharged from the dust collection space 42 flows in, an outlet 112 for discharging air from the pipe portion 60 into the dust collection space 42, and a passage 86 communicating with the pipe portion 60, and the inner surface of the passage 86 is characterized by having a curved shape that bends toward the outlet 112 as it moves away from the pipe portion 60, or an upper surface 124 that includes a slope toward the outlet 112.

[0066] In the vacuum cleaner 1 of the present invention, the pipe section 60 communicating with the suction port 52 extends from the bottom side of the dust collection container 40 toward the structure 80. Therefore, the vacuum cleaner 1 of the present invention is capable of discharging the dust-containing air introduced via the pipe section 60 from the outlet 112 provided in the structure 80 toward the dust collection space 42 formed between the dust collection container 40 and the structure 80. This allows the vacuum cleaner 1 to centrifuge the dust that has flowed in from the flow path extending inside the dust collection container 40. Furthermore, in the vacuum cleaner 1 of the present invention, the inner surface of the passage 86 communicating with the pipe portion 60 has an upper surface 124 that has a curved shape that bends toward the discharge port 112 as it moves away from the pipe portion 60, or that includes a slope that slopes toward the discharge port 112. As a result, the air flowing through the flow path extending inside the dust container 40 is guided by the curved shape or slope of the upper surface 124 and flows in the radial direction of the dust container 40, and is then discharged from the discharge port 112 toward the dust container 40. Therefore, in the vacuum cleaner 1 of the present invention, dust passing through the passage 86 can be prevented from adhering to and accumulating on the upper surface 124.

[0067] (2-2) In the electric vacuum cleaner 1 according to (2-1) above, the structure 80 may have a first inner tube 90, a second inner tube 92 that is radially smaller than the first inner tube 90 and is located closer to the tube portion 60 than the first inner tube 90, and an expanding portion 94 that is located between the first inner tube 90 and the second inner tube 92 and expands radially outward from the second inner tube 92 toward the first inner tube 90, and the second inner tube 92 may be characterized in that it has the passage 86.

[0068] The electric vacuum cleaner 1 of the present invention can prevent dust from getting caught at the boundary between the first inner tube 90 and the second inner tube 92 by providing an expanded portion 94 between the first inner tube 90 and the second inner tube 92 in the structure 80 as described above in (2-2).

[0069] (2-3) The electric vacuum cleaner 1 according to (2-1) or (2-2) above may be characterized in that, when viewed from the central axis direction of the structure 80, the center of the outlet 112 is located at a position offset to one side of the circumferential direction of the structure 80 relative to the center of the structure 80 or the center of the passage 86.

[0070] By adopting the configuration described above in (2-3), the vacuum cleaner 1 of the present invention makes it easier for the dust-laden airflow that flows through the passage 86 provided in the structure 80 and is discharged from the outlet 112 to hit the inner circumferential surface of the dust container 40 at an angle. This makes it easier for the vacuum cleaner 1 to form a swirling flow along the inner circumferential surface of the dust container 40. Therefore, by adopting the configuration described above in (2-3), the vacuum cleaner 1 can further improve its ability to centrifuge dust from the air (centrifugal separation ability).

[0071] (2-4) The electric vacuum cleaner 1 according to any one of (2-1) to (2-3) above may be characterized in that the inner surface of the passage 86 has a first inner surface 120 and a second inner surface 122 extending along the axial direction of the passage 86, and the second inner surface 122 has a curved surface 128 that is convex radially outward of the passage 86 when viewed from the axial direction of the passage 86.

[0072] By being configured as described above in (2-4), the vacuum cleaner 1 of the present invention can pass the dust-containing airflow that has flowed through the passage 86 provided in the structure 80 between the first inner surface 120 and the second inner surface 122 and be discharged from the outlet 112 into the dust container 40. Furthermore, if the second inner surface 122 has a curved surface 128 that is convex radially outward from the passage 86 as described above in (2-4), a swirling flow is easily generated by the air that is discharged from the outlet 112 along the curved surface 128. Therefore, by being configured as described above in (2-4), the vacuum cleaner 1 of the present invention can further improve its ability to centrifuge dust from the air (centrifugal separation ability).

[0073] (2-5) The electric vacuum cleaner 1 according to any one of (2-1) to (2-4) above may be characterized in that the inner surface of the passage 86 has a first inner surface 120 and a second inner surface 122 extending along the axial direction of the passage 86, and the first inner surface 120 has a first guide portion 126 that curves so that the discharge outlet 112 expands circumferentially on the side closer to the discharge outlet 112 than the central axis of the structure 80 when viewed from the axial direction of the passage 86.

[0074] By adopting the configuration described in (2-5) above, the vacuum cleaner 1 of the present invention can pass a dust-laden airflow that has flowed through the passage 86 provided in the structure 80 between the first inner surface 120 and the second inner surface 122 and be discharged from the outlet 112 into the dust collection container 40. Furthermore, by providing the first guide portion 126, which curves so that the outlet 112 expands in the circumferential direction of the passage 86, on the first inner surface 120 on the side closer to the outlet 112 than the central axis of the structure 80, as described in (2-5) above, dust is less likely to get caught at the outlet 112, and the dust-laden airflow discharged from the outlet 112 is more likely to hit the inner circumferential surface of the dust collection container 40 at an angle. This makes it easier for the vacuum cleaner 1 to generate a swirling airflow inside the dust collection container 40. Therefore, by adopting the configuration described in (2-5) above, the vacuum cleaner 1 of the present invention can further improve its ability to centrifuge dust from air (centrifugal separation ability).

[0075] (2-6) The electric vacuum cleaner 1 according to any one of (2-1) to (2-5) above may be characterized in that the inner surface of the passage 86 has a first inner surface 120 and a second inner surface 122 extending along the axial direction of the passage 86, and the second inner surface 122 has a second guide portion 130 that curves so that the discharge outlet 112 expands circumferentially on the side closer to the discharge outlet 112 than the central axis of the structure 80 when viewed from the axial direction of the passage 86.

[0076] By being configured as described above in (2-6), the vacuum cleaner 1 of the present invention can pass the dust-containing airflow that has flowed through the passage 86 provided in the structure 80 between the first inner surface 120 and the second inner surface 122 and be discharged from the discharge port 112 into the inside of the dust collection container 40. Furthermore, by being configured as described above in (2-6), the second inner circumferential surface is provided with the second guide portion 130 that curves so that the discharge port 112 expands in the circumferential direction of the passage 86 on the side closer to the discharge port 112 than the central axis of the structure 80, making it difficult for dust to get caught at the discharge port 112. Therefore, by being configured as described above in (2-6), the vacuum cleaner 1 of the present invention can further improve its ability to centrifuge dust from the air (centrifugal separation ability).

[0077] (2-7) The electric vacuum cleaner 1 according to any one of (2-1) to (2-6) above may be characterized in that the central axis of the passage 86 is located radially outward relative to the central axis of the structure 80, the structure 80 has an inner tube 82 having the inlet 84 on its circumferential surface, the passage 86 is located inside the inner tube 82 when viewed from the axial direction, and a space 88 through which air flowing in from the inlet 84 flows is located between the circumferential surface of the inner tube 82 and the passage 86.

[0078] By being configured as described above in (2-7), the vacuum cleaner 1 of the present invention can enlarge the space 88 formed between the circumferential surface of the inner cylinder 82 and the passage 86. This makes it easier for the air swirling inside the dust collection container 40 to flow into the space 88 from the inlet 84. Therefore, by being configured as described above in (2-7), the vacuum cleaner 1 can reduce the air resistance when air flows into the space 88 through the inlet 84.

[0079] [Third Aspect of the Present Invention] The third aspect of the present invention is an invention made to solve the same problem as the first aspect described above. (3-1) The electric vacuum cleaner 1 of the present invention comprises a vacuum cleaner body 10 having an electric blower 14 that generates suction force, a dust collection container 40 that is detachable from the vacuum cleaner body 10 and has a dust collection space 42 for collecting dust sucked through a suction port 52 by the electric blower 14, and a structure 80 that defines the dust collection space 42 between the dust collection container 40 and the structure 80, wherein the dust collection container 40 has a pipe portion 60 that communicates with the suction port 52 and extends from the bottom side toward the structure 80, and the structure 80 has an inlet 84 through which air discharged from the dust collection space 42 flows in. and a passage 86 communicating with the pipe section 60, which has an outlet 112 for discharging air from the pipe section 60 into the dust collection space 42, the central axis of the passage 86 being located radially outward relative to the central axis of the structure 80, the structure 80 having an inner tube 82 having the inlet 84 on its circumferential surface, the passage 86 being located inside the inner tube 82, and a space 88 being formed between the circumferential surface of the inner tube 82 and the passage 86, through which the air flowing in from the inlet 84 flows.

[0080] By configuring vacuum cleaner 1 of the present invention as described above in (3-1), pipe section 60 communicating with suction port 52 extends from the bottom side of dust collection container 40 toward structure 80. Therefore, vacuum cleaner 1 of the present invention is capable of discharging dust-containing air introduced via pipe section 60 from outlet 112 provided in structure 80 toward dust collection space 42 formed between dust collection container 40 and structure 80. This allows vacuum cleaner 1 to centrifuge dust that has flowed in from the flow path extending inside dust collection container 40. Furthermore, the space 88 formed between the circumferential surface of the inner cylinder 82 and the passage 86 can be made large. This makes it easier for the air swirling inside the dust container 40 to flow into the space 88 from the inlet 84 in the vacuum cleaner 1. Therefore, by adopting the configuration according to (3-1) above, the vacuum cleaner 1 can easily reduce the air resistance when the air flows into the space 88 through the inlet 84. Therefore, the vacuum cleaner 1 of the present invention can efficiently separate dust from the air that has flowed into the dust container 40 by centrifugal separation.

[0081] (3-2) In the electric vacuum cleaner 1 according to (3-1) above, the inlet 84 may be formed in a peripheral surface that defines the space 88.

[0082] By configuring the vacuum cleaner 1 of the present invention as described above in (3-2), the air swirling inside the dust container 40 can easily flow into the space 88 from the inlet 84. Therefore, by configuring the vacuum cleaner 1 according to the above described (3-2), the air resistance when the air flows into the space 88 through the inlet 84 can be reduced.

[0083] (3-3) The electric vacuum cleaner 1 according to (3-1) or (3-2) above may be characterized in that the inlet 84 is formed on the opposite side to the outlet 112 .

[0084] By being configured as described above in (3-3), the vacuum cleaner 1 of the present invention can prevent dust from flowing into the inlet 84 without being sufficiently separated by centrifugal separation from the air that has just been discharged from the outlet 112 into the inside of the dust container 40. Therefore, the vacuum cleaner 1 of the present invention can efficiently separate dust from the air that has flowed into the inside of the dust container 40 by centrifugal separation. (3-4) In the electric vacuum cleaner 1 according to the above (3-1) to (3-3), the space 88 may be formed between the inner cylinder 82 and the passage 86 in a C-shape. By configuring the vacuum cleaner 1 of the present invention as described above in (3-4), the air swirling inside the dust container 40 can easily flow into the space 88 from the inlet 84. Therefore, by configuring the vacuum cleaner 1 according to the above in (3-4), the air resistance when the air flows into the space 88 through the inlet 84 can be reduced.

[0085] The present invention is not limited to the above-described embodiments and modifications, and other embodiments may be possible within the scope of the claims, based on the teachings and spirit of the invention. The components of the above-described embodiments may be arbitrarily selected and combined. Furthermore, any component of the embodiment may be arbitrarily combined with any component described in the Summary of the Invention or any component embodying any component described in the Summary of the Invention. The present invention intends to obtain rights to these as well through amendments to this application or divisional applications, etc. [Industrial Applicability]

[0086] The present invention can be suitably used in vacuum cleaners and vacuum cleaner systems in general. [Explanation of symbols]

[0087] 1: Vacuum cleaner 10: Vacuum cleaner body 14:Electric blower 30: Dust collector 40: Dust collection container 42: Dust collection space 44: Bottom 50: Suction part 52: Suction port 60: Pipe section 80 :Structure 82: Inner cylinder 84:Inlet 86: Passage 88: Space 90: First inner cylinder 92:Second inner cylinder 94: Enlarged section 112: Outlet 120: First inner surface 122:Second inner surface 124:Top surface 126:First Information Department 128: Curved surface 130:Second information section C1: Structure axis position C2: Passage axis position C3: outlet center

Claims

1. a vacuum cleaner body having an electric blower that generates suction power; a dust collection container that is detachable from the vacuum cleaner body and has a dust collection space for collecting dust sucked through a suction port by the electric blower; a structure that is detachable from the dust collection container and that defines the dust collection space between the dust collection container and the structure, The dust collection container has a pipe portion that communicates with the suction port and extends from a bottom side toward the structure side, The structure is an outlet for discharging air from the pipe portion into the dust collection space; an inlet through which air discharged from the dust collection space flows in, It is detachably connected to the pipe portion, An electric vacuum cleaner characterized by:

2. 2. The electric vacuum cleaner according to claim 1, wherein the pipe portion extends to a position between one-third and two-thirds of the length of the dust container in the axial direction of the dust container.

3. 2. The electric vacuum cleaner according to claim 1, wherein the pipe portion extends to a position between one-third and two-thirds of the dust collection space in the axial direction of the dust collection container.

4. 4. The electric vacuum cleaner according to claim 1, wherein dust is collected around the pipe portion in the dust collection space.

5. the structure has the outlet and a passage communicating with the pipe portion, The electric vacuum cleaner according to any one of claims 1 to 3, characterized in that, when viewed in the axial direction of the central axis of the structure, the center of the discharge outlet is located at a position offset to one side in the circumferential direction of the structure with respect to the center of the structure or the center of the passage.

6. the structure has the outlet and a passage communicating with the pipe portion, the inner surface of the passage has a first inner surface and a second inner surface extending along an axial direction of the passage; The electric vacuum cleaner according to any one of claims 1 to 3, characterized in that the second inner surface has a curved surface that is convex radially outward of the passage when viewed from the axial direction of the passage.

7. the structure has the outlet and a passage communicating with the pipe portion, the inner surface of the passage has a first inner surface and a second inner surface extending along an axial direction of the passage; The electric vacuum cleaner according to any one of claims 1 to 3, characterized in that the first inner surface has a first guide portion that curves so that the discharge outlet expands in the circumferential direction of the passage on a side closer to the discharge outlet than the central axis of the structure when viewed from the axial direction of the passage.

8. the structure has the outlet and a passage communicating with the pipe portion, the inner surface of the passage has a first inner surface and a second inner surface extending along an axial direction of the passage; The electric vacuum cleaner according to any one of claims 1 to 3, characterized in that the second inner surface has a second guide portion that curves so that the discharge outlet expands in a circumferential direction on a side closer to the discharge outlet than a central axis of the structure when viewed from the axial direction of the passage.

9. The structure is a passage communicating with the pipe portion and an inner cylinder having the inlet on a circumferential surface thereof, The passage is located inside the inner cylinder, a space through which air flowing in from the inlet flows is provided between the circumferential surface of the inner cylinder and the passage, 4. The electric vacuum cleaner according to claim 1, wherein a central axis of the passage is positioned radially outward relative to a central axis of the structure.

10. a suction section having the suction port and integrally formed with the pipe section; 4. The electric vacuum cleaner according to claim 1, wherein the pipe portion penetrates the bottom of the dust collection container and extends toward the structure.

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