JP2018175521A - Vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum cleaner that reduces a loss of a dust collection device and keeps strong suction force.SOLUTION: A vacuum cleaner comprises a cleaner body 1, and a dust collection device 10 attachable/detachable to/from the cleaner body 1. The dust collection device 10 comprises an outer cylinder 30 including an opening in a lower part, and an inner cylinder 40 provided in the outer cylinder. The inner cylinder 40 comprises a truncated cone-shaped frame body 41, and an umbrella part 44 on a lower part of the frame body 41. In the truncated cone-shaped frame body 41, the diameter of an upper part is larger than the diameter of the lower part. A mesh member is laid over the truncated cone-shaped frame body. In the mesh member, openings of a lower part are made smaller than those of an upper part.SELECTED DRAWING: Figure 16

Description

  The present invention relates to a vacuum cleaner.

  Conventionally, two types of dust collection are roughly divided into a paper pack type dust collector that compresses sucked dust into a paper pack, and a cyclone type dust collector that is centrifuged by swirling air flow and stored in the dust collector. There is a method. The cyclone system tends to have a larger pressure loss than the paper pack system because it generates a swirling air flow.

  In Japanese Patent Application Laid-Open No. 2007-167450 (Patent Document 1), the inner cylinder of the cyclonic vacuum cleaner has a frusto-conical shape, and a penetration portion communicating inside and outside is formed on the circumferential surface and the upper surface thereof. The dust collection device is described in which a filter for collecting and collecting dust is provided in the penetration part.

JP 2007-167450 A

  According to the dust collector described in Patent Document 1, once separated dust is not absorbed by the swirling air flow, it is directly sucked by the air flow generated by the electric blower, and the dust clogs the filter at the outlet of the cyclone cylinder. I try to eliminate the problem.

  However, in the dust collecting apparatus described in Patent Document 1, dust is likely to be suctioned from the filter near the housing portion that holds the suctioned dust. Further, in order to make it difficult for the dust to be sucked, it is necessary to make the filter eyes finer, but when the filter eyes are made finer, the pressure loss tends to increase. An increase in pressure loss causes the suction to decrease.

  The present invention is to solve the above-mentioned problems, and it is an object of the present invention to provide a vacuum cleaner which reduces pressure loss of a dust collection device and maintains a strong suction force.

  In order to solve the above-mentioned subject, the vacuum cleaner of the present invention has a cleaner body and a dust collector which can be detached from the cleaner body, and the dust collector has an opening at the lower part. The inner cylinder includes an outer cylinder and an inner cylinder provided in the outer cylinder, and the inner cylinder has a truncated cone-shaped frame and an umbrella portion at a lower portion of the frame, the truncated cone The frame is characterized in that the diameter of the upper part is larger than the diameter of the lower part, the mesh member is stretched over the truncated cone-shaped frame, and the mesh member has a smaller opening in the lower part than the upper part.

  ADVANTAGE OF THE INVENTION According to this invention, the pressure loss of a dust collector can be reduced, and the vacuum cleaner which maintains strong suction can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS The external appearance perspective view which shows the vacuum cleaner of embodiment which concerns on this invention. The external appearance perspective view which shows the state which removed the dust collector and the suction hose from the cleaner body. The perspective view which shows the state which removed the upper case of the cleaner body. The center sectional view showing the cleaner body which looked at the cleaner body from the side. The front view which shows a dust collector. The left view which shows a dust collector. The rear view which shows a dust collector. The disassembled figure which shows a dust collector. (A) is an external view which shows a dust collector, (b) is an external view which shows the state which opened the filter case upper part of (a). (A) is BB sectional drawing of FIG. 6, (b) is the C section enlarged view of Fig.10 (a). An exploded view of the inner cylinder. BB sectional drawing of FIG. 6 showing the airflow in a dust collector. AA sectional drawing of FIG. 5 in the state which closed the bottom cover. AA cross section of FIG. 5 in the state which opened the bottom lid The bottom view which looked at only an outer cylinder from the downward direction. The BB sectional drawing of FIG. 6 which shows the inner cylinder of another embodiment which concerns on this invention. The AA sectional view of Drawing 5 in the state where the bottom lid showing the inner cylinder of another embodiment concerning the present invention was closed.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows an external perspective view of the vacuum cleaner according to the embodiment of the present invention, and FIG. 2 shows an external perspective view of the vacuum cleaner main body 1 with the dust collector 10 and the suction hose 2 removed. In addition, about the up-down direction, the left-right direction, and the front-back direction, it is set as the direction shown in FIG. In addition, the left-right direction is seen from the cleaner body 1 side.

  The electric vacuum cleaner S includes a cleaner body 1 and a cyclone type dust collector 10 which is detachably provided to the cleaner body 1.

  The vacuum cleaner body 1 is connected to the hand handle 3 via a suction hose 2, and the hand handle 3 is connected via an extension pipe 6 to a suction body 7 for sucking in dust and the like. Dust such as dust sucked from the suction body 7 is collected in the dust collector 10.

  The cleaner body 1 is provided with a pair of left and right wheels 15a for freely moving the cleaner body 1, and one caster 15b at the front. In addition, one roller 15c is provided at the rear so as not to damage the rear when the cleaner body 1 is inclined rearward (see FIG. 4).

  The hand handle 3 includes an operation unit 4 responsible for driving and controlling an electric blower 14 (see FIG. 4) incorporated in the cleaner body 1 and an electric rotating brush (not shown) provided on the suction body 7 There is. The operation unit 4 is provided with operation buttons 5 such as (strong, medium, weak) buttons to be pressed when starting operation and a (off) button to be pressed when stopping operation.

<Vacuum cleaner main body 1>
As shown in FIG. 2, in the cleaner body 1, an upper case 1 a and a lower case 1 b are combined to form an outer shell. The upper case 1a and the lower case 1b are formed of a lightweight resin material. At a front portion of the lower case 1b, a hose attachment port (main body intake port) 11 through which air containing dust is sucked is opened.

  FIG. 3 shows a perspective view of the state where the upper case 1a of the cleaner body 1 is removed, and FIG. 4 shows a center sectional view of the cleaner body 1 when the cleaner body 1 is viewed from the side.

  The hose attachment port 11 is connected to an introduction pipe 20 (see FIG. 3 and FIG. 4) through which air including dust in the cleaner body 1 passes.

  Inside the cleaner body 1, as shown in FIG. 4, the motor case 16 houses an electric blower 14 that generates suction force with the suction body 7 (see FIG. 1). In addition, a pleated high dust collecting filter 29 is disposed in the flow path of the air after removing the dust sucked by the electric blower 14 to clean the exhaust gas.

  A hose attachment port 11 is provided on the front side which is the front of the vacuum cleaner main body 1 shown in FIG. 2 and on the left side in the vacuum cleaner main body 1 fluidly flows gas through the introduction pipe 20. There is an inlet tube outlet 12 connected. The inlet pipe outlet 12 is fluidly connected to the dust collection device 10 set in the cleaner body 1 so that the gas flows. The dust collection device 10 separates dust from air including dust and the like sucked by the suction body 7 and stores the dust.

  On the other hand, a duct inlet 13 to a duct 21 (see FIG. 3) communicating with the electric blower 14 is provided on the front upper portion of the cleaner body 1. The duct inlet 13 is a port through which the air after the dust is removed by the dust collector 10 is sucked. The duct inlet portion 13 is provided with a protection filter to suppress the entry of foreign matter into the electric blower 14. The protection filter is provided upstream of the grid-like filter cover 17 (see FIG. 2).

<Dust collector 10>
As shown by arrow α1 in FIG. 2, the dust collecting apparatus 10 is detachably attached in a state where the front upper portion of the cleaner body 1 is inclined rearward (see FIG. 4). The dust collector 10 is removed from the cleaner body 1 by moving it in the opposite direction to the arrow α1 shown in FIG. 2 when dust is collected in the outer cylinder 30, and after dust removal (discarding), the arrow α1 direction. It is attached to the cleaner body 1 by moving to.

  The cleaner body 1 has a structure for positioning the dust collector 10 and a structure for fixing the dust collector 10 so that air tightness can be easily maintained when the dust collector 10 is attached to the cleaner body 1. .

  A handle 35 provided at the rear of the dust collection device 10 is stored in the concave handle storage portion 22 of the cleaner body 1 shown in FIG. 2 (see FIG. 4). This is a structure for positioning of the dust collection device 10 when setting the dust collection device 10 to the cleaner body 1.

  Further, a fitting portion 1a1 with the bottom surface of the bottom cover 31 (see FIG. 2) of the dust collecting apparatus 10 is provided at a lower portion of the vacuum cleaner main body 1 to which the dust collecting apparatus 10 is attached. And a structure for The upper part of the dust collecting apparatus 10 is fixed by a lid 19 provided on the upper part of the cleaner body 1.

  As shown in FIG. 4, in the state where the dust collecting apparatus 10 is attached to the cleaner body 1, the dust collecting apparatus 10 is fluidly connected to the duct 21. The duct 21 is adjacent to a protective filter covered by the inlet pipe 20 and the filter cover 17 adjacent to the hose attachment port 11.

  The electric blower 14 is fluidly connected to the upstream side with a duct 21 through which the air passing through the protection filter after removing dust is fluidly connected, while the high dust collecting filter 29 is fluidly connected downstream.

  In the vacuum cleaner S, the dust collection device 10 is positioned upstream of the electric blower 14, and in this embodiment, the dust collection device 10, the duct 21, and the electric blower 14 are arranged in this order from the upstream side. It is done. Further, from the dust collecting device 10 to the electric blower 14, the upper portion of the dust collecting device 10 is in communication with the duct 21 and the duct 21 to the upper portion of the electric blower 14.

<Flow path of air containing dust sucked into the cleaner body 1>
In the state where the dust collection device 10 is attached to the cleaner body 1, as shown in FIG. 4 of the longitudinal sectional view, it is a series of flow paths from the hose attachment port 11 to the high dust collection filter 29.

  In the cleaner body 1 of the vacuum cleaner S, the air sucked from the suction body 7 into the cleaner body 1 flows as shown by arrows β1 to β8 shown in FIG.

  Specifically, air including dust and the like sucked by the suction body 7 (see FIG. 1) flows from the hose attachment port 11 into the introduction pipe 20 in the cleaner main body 1 (arrow β1 in FIG. 4). The inside of the pipe 20 passes through the inlet pipe outlet 12 to the dust collector 10 (arrow β2 in FIG. 4). The air containing dust and the like that has entered the dust collection device 10 becomes an air flow around the circumference of the inner cylinder 40 (arrow β3 in FIG. 4). Air and dust are separated by the centrifugal force generated by the air flow, the air is sucked into the inner cylinder 40, and a part of the air flow (arrow β4 in FIG. 4) flows to the lower part of the dust collector 10. Dust is dropped along the inner surface of the outer cylinder 30 by the air flow (arrow β4 in FIG. 4) and collected at the lower part of the dust collector 10.

  The air flow (arrow β4 in FIG. 4) to the lower part of the dust collection device 10 rises along the outer peripheral surface of the cylindrical umbrella portion 44 (arrow β5 in FIG. 4) and is drawn into the inner cylinder 40. In the inner cylinder 40, air containing fine dust which can not be separated by centrifugation which has passed through a mesh member 42a to be described later flows, and the fine dust is removed by the dust collection filter 32 provided in the dust collection device 10. Then, the air from which dust has been removed passes through the duct 21 and is sucked into the electric blower 14 (arrow β6 in FIG. 4). Then, the air sucked into the electric blower 14 passes through the high dust collecting filter 29 and the foreign matter remaining therefrom is removed (arrow β7 in FIG. 4) It is discharged (arrow β8 in FIG. 4).

  Here, the high dust collection filter 29 removes fine dust that could not be collected by the dust collection filter 32 and wear debris of the carbon brush (not shown) of the electric blower 14 from the air after dust removal, The clean air does not contain the air, and the air is discharged to the outside of the vacuum cleaner body 1.

  In addition, although details are omitted, a packing (not shown) is provided at the connection portion (contact portion) of each component in the vicinity of the flow path of the air sucked into the cleaner main body 1 described above. It is held.

<Code Reel 23 and Introductory Tube 20>
As shown in FIG. 3, the motor case 16 for housing the electric blower 14 shown in FIG. 4 is disposed on the rear right side of the cleaner body 1 and for supplying electric power from the outlet etc. to the electric blower 14 on the left rear. A cord reel 23 for housing the power supply cord 23a is disposed. In the present embodiment, the introduction pipe 20 and the introduction pipe outlet 12 are disposed on the left side in terms of the arrangement of the motor case 16 and the cord reel 23, but the invention is not limited to this.

  The introduction pipe 20 is disposed not on the center of the cleaner body 1 but on either the left or right side, although the details will be described later, although the tangential direction of the inner peripheral surface of the outer cylinder 30 of the dust It is for making it easy to generate a swirling flow by making the suctioned air flow in from either of the left and right side parts of the main body 1). Therefore, although the rotational direction of the swirling flow differs depending on the arrangement of the introduction pipe 20, the rotational direction may be either clockwise or counterclockwise. For example, in the case where the introduction pipe 20 is disposed on the left side, a clockwise swirling flow is obtained. In the present embodiment, the introduction pipe 20 is disposed on the left side, and is in a clockwise swirl flow.

  Note that, for example, the introduction pipe may be disposed on the left side (or the center) and the shape of the introduction pipe having many bends such that the introduction pipe outlet is on the right side may be employed, but the pressure loss increases. Therefore, the introduction pipe 20 is arranged as shown in FIG. 3 and is shaped so as to be connected to the introduction pipe outlet 12 with the largest possible radius from the hose attachment port 11 in order to minimize an increase in pressure loss in the introduction pipe 20 And Further, the volume and the cross-sectional area in the introduction pipe 20 are also formed as large as possible in order to minimize the increase in pressure loss.

<Dust collector 10>
Next, the dust collecting apparatus 10 will be described with reference to FIGS. 5 to 11. The front view of the dust collector 10 is shown in FIG. 5, and the left view of the dust collector 10 is shown in FIG. Moreover, the rear view of the dust collector 10 is shown in FIG. 7, and the exploded view of the dust collector 10 is shown in FIG. In FIG. 9, attachment and detachment of the dust collection filter 32 mentioned later and filter case 34 are shown in figure. 10 shows a cross-sectional view taken along the line BB shown in FIG. 6, and FIG. 11 shows an exploded view of an inner cylinder 40 described later. In addition, when demonstrating the dust collector 10 alone by FIG. 5 or subsequent ones, let the bottom cover 31 side be downward.

  The dust collector 10 has a function of separating dust from air including dust and the like sucked by the suction body 7 and collecting the dust.

  The dust collecting apparatus 10 is generally formed of an outer cylinder 30, an inner cylinder 40, a filter case 33 for containing a dust collection filter 32 (see FIG. 4), and a bottom cover 31. A filter case 33 is disposed at the upper portion of the outer cylinder 30, and a bottom lid 31 is disposed at the lower portion. The inner cylinder 40 is provided in the outer cylinder 30 concentrically with the outer cylinder 30.

  Although details will be described later, the dust collection device 10 has a space between the outer cylinder 30 and the inner cylinder 40 for separating and collecting dust. That is, in the space formed by the outer cylinder 30 and the inner cylinder 40, the dust separating unit 10A is provided at the upper part, and the dust containing unit 10B is provided at the lower part.

  The dust separation unit 10A is a space that separates dust from air carrying dust. The dust storage unit 10B is a space for storing and storing dust.

<External cylinder 30>
As shown in FIG. 8, the outer cylinder 30 has a substantially cylindrical shape having an upper opening 30i and a lower opening 30j which are open at the top and the bottom, and air (gas) containing dust is introduced from the inlet pipe outlet 12 to the side surface. An inflow tube 38 is provided. The outer inner surface (the inner surface located on the left side in FIG. 7) of the inflow pipe 38 is formed to be connected to the inner peripheral surface 30 n of the outer cylinder 30 in a substantially tangential direction. The inflow pipe 38 is a connection to the introduction pipe 12 and is formed with an opening 38a into which air containing dust is introduced from the introduction pipe outlet 12 (see FIG. 7). Further, a throttling portion 38b is provided on the surface of the inflow pipe 38 facing the opening 38a (the opening of the portion where the inflow pipe 38 and the outer cylinder 30 are connected), and the opening area is smaller than the opening 38a.

  The throttling portion 38b of the inflow pipe 38 is formed by the throttling wall 30b along the arc shape of the outer cylinder 30, and the first vertical side 38b1 in the vertical direction and the upper portion is outwardly out of the vertical direction and the lower portion is inwardly inclined The opening is a substantially trapezoidal opening formed of the second vertical side 38b2, the first horizontal side 38b3 in the horizontal direction, and the second horizontal side 38b4. As described above, the first vertical side 38b1 is formed substantially tangential to the inner circumferential surface 30n of the outer cylinder 30. Since the opening 38 a is shaped along the tangent of the inner circumferential surface 30 n of the outer cylinder 30, air containing dust etc. becomes a swirling air flow along the inner circumferential surface 30 n of the outer cylinder 30.

  In addition, the second vertical side 38b2 is configured such that the upper portion is outward and the lower portion is inward, and the throttle portion 38b is an opening in which the lower portion is wider than the upper portion, thereby adjusting the air volume flowing to the dust storage portion 10B. Even if dust accumulates in the dust container 10B, the dust can be compressed and transported to the dust container 10B.

  Due to the shape of the throttling portion 38b, the air flowing from the inlet pipe outlet 12 into the outer cylinder 30 of the dust collection device 10 becomes an air flow around the central axis O of the outer cylinder 30 (central axis of the dust collection device 10) The inside of the outer cylinder 30 is turned clockwise around O. The dust contained in the air is separated by the centrifugal force in the dust separation unit 10A by the swirling air flow.

  Further, as shown in FIGS. 5 and 10, in the outer cylinder 30, the dust separating portion 10A at the upper portion has a cylindrical shape, and the dust accommodating portion 10B at the lower portion has steps formed by overlapping cylindrical enlarged portions having different diameters. It is shaped. The lower step shape of the outer cylinder 30 has a larger diameter as it goes downward. In the present embodiment, the step shape comprises three enlargements. The enlarged portion (step) is provided to prevent dust accumulated in the dust storage portion 10B from scattering back to the dust separating portion 10A, so the upper surface of the enlarged portion (step) is called the anti-return surface. At the boundary between the upper cylindrical shape and the lower step shape, a first anti-return surface 30d1 whose radius changes stepwise in a direction substantially perpendicular to the central axis O is provided. The first anti-return surface 30d1 is enlarged about 2.5 mm outward from the cylindrical inner peripheral surface of the upper portion of the outer cylinder 30. The first anti-return surface 30d1 is provided on substantially the same plane as the upper surface 44c of the umbrella portion 44 of the inner cylinder 40 when the inner cylinder 40 described later is mounted on the outer cylinder 30. Below the first anti-return surface 30d1, a second anti-return surface 30d2 whose radius changes stepwise in a direction substantially perpendicular to the central axis O is provided. Further, below the second anti-return surface 30d2, a third anti-return surface 30d3 whose radius changes stepwise in a direction substantially perpendicular to the central axis O is provided.

  As mentioned earlier, the step shape is a stack of cylindrical shapes with different diameters. In the present embodiment, the height from the first anti-return surface 30d1 to the second anti-return surface 30d2 is about 12.5 mm. The second anti-return surface 30d2 is enlarged about 5 mm from the inner peripheral surface of the first anti-return surface 30d1. The height from the second anti-return surface 30d2 to the third anti-return surface 30d3 is about 12.5 mm. The third anti-return surface 30d3 is enlarged about 2.5 mm outward from the inner circumferential surface of the second anti-return surface 30d2. The height from the third anti-return surface 30d3 to the bottom of the outer cylinder 30 is about 16 mm. In addition, the outer circumferential surface of the outer cylinder 30 is also enlarged according to the expansion from the cylindrical inner circumferential surface of each anti-return surface.

  The anti-return surface includes a shape such as a slope, a taper, or a curved surface. Here, “substantially vertical” and “substantially horizontal” are used to indicate the shape, and the shape is not limited to strictly vertical or horizontal as long as the shape can be effective.

  As described above, by forming the dust storage portion 10B in a step shape in which the diameter is increased toward the lower side, an effect of suppressing the scattering return of the dust accumulated in the dust storage portion 10B is achieved. Although the details will be described later, the dust sucked into the dust collection device 10 swirls on the inner peripheral surface side of the outer cylinder 30 by the centrifugal force, and is transported to the dust storage portion 10B. At this time, the dust transported to the dust storage unit 10B moves back to the dust separation unit 10A side by the flow turning in the dust storage unit 10B, but the dust is returned to the dust separation unit 10A side due to the anti-return surface. Is suppressed and stays in the dust container 10B. As in the present embodiment, by providing a plurality of anti-return surfaces, even if dust deposits to the lowermost stage (third anti-return surface 30d3), the next second anti-return surface 30d2 or the first anti-return surface It is possible to deposit dust while suppressing backflow until 30d1. In addition, since the frequency which suppresses a return can be raised by providing two or more expansion parts, you may increase it with 4 steps, 5 steps, etc. which have a level | step difference more than this embodiment. However, if it is necessary to fit within the limited height of the outer cylinder 30 (the height of the dust storage portion 10B) and the diameter of the outer cylinder 30, the expansion of each anti-return surface to the outside diameter by 2.5 mm With the above, it is possible to effectively suppress the return of dust. As described above, in the present embodiment, the second anti-return surface 30d2 is about 5 mm in order to make the minimum anti-return surface about 2.5 mm and to obtain the desired volume of the dust storage portion 10B.

  Further, as in the present embodiment, the lower portion of the outer cylinder 30 is formed into a step shape in which cylindrical shapes having different diameters are stacked, and the bottom portion is opened, the dust dischargeability by the dust discharge mechanism described later can be improved. When the dust is discharged, the diameter of the outer cylinder 30 is increased toward the lower side, so that it is possible to suppress the return of the dust without impairing the discharge property.

  Although the bottom view which looked at only the outer cylinder 30 from the downward direction in FIG. 15 is shown, when it sees from the bottom, it has a shape where each anti-return surface is not hidden. In other words, for example, the inner wall surface of the outer cylinder 30 formed between the second anti-return surface 30d2 and the third anti-return surface 30d3 is substantially vertical in this embodiment, but the upper surface (the second anti-return It may be inclined outward on the basis of the surface 30d2), but it does not incline inward (the diameter of the inner peripheral surface of the outer cylinder 30 is the same or spreads as it goes downward from above). This is because if a flat surface that protrudes toward the inside of the outer cylinder 30 is formed, it becomes a resistance at the time of dust discharge, and prevents a drop in the dischargeability.

  In the present embodiment, the anti-return surface (30d1 to 30d3) is provided in the range where the flow velocity is high, but the anti-return surface (30d1 to 30d3) of the outer cylinder 30 is not provided around the entire inner peripheral surface of the outer cylinder 30. The configuration may not be provided in part of the opening 38a. The flowed-in air has the highest flow velocity in the vicinity of the facing of the opening 38a and is a swirl flow such that the flow velocity gradually decreases. For this reason, in the embodiment, the anti-return surface (30d1 to 30d3) is provided in a range where the flow velocity is high.

  Further, as shown in FIG. 6, the dust collecting apparatus 10 is provided with a handle 35 for carrying. At the upper part of the handle 35, a waste disposal button 35a is provided which is pressed when discharging (discarding) waste. On the lower front side of the outer cylinder 30, a bottom cover 31 described later is rotatably supported so as to open and close the lower opening 30j on the bottom surface side of the outer cylinder 30. The handle 35 incorporates a rod 80 for transmitting a force when pressing the dust discarding button 35a to a slide clamp 81 described later. In order to operate the rod 80 and the slide clamp 81 smoothly, the handle 35 is provided. It is preferable that the side surface of the tube 30 is not a step or an inclined surface but a substantially vertical (substantially vertical) surface. That is, as in the present embodiment, by providing a clamp mechanism to be described later at a position where the opening 38a side is substantially D-shaped (not shown) when the outer cylinder 30 is viewed from below, the rod 80 in the vertical direction Since it can operate, the slide clamp 81 can be operated smoothly, and dust can be discharged more easily.

<Filter case 33>
The upper surface of the filter case 33 provided at the upper portion of the outer cylinder 30 has a lid structure, and is divided into a filter case upper portion (upper lid) 33a and a filter case lower portion 33b. The filter case lower portion 33b is integrally formed with the upper portion of the outer cylinder 30, and a filter receiving portion 34 for receiving the dust collection filter 32 (see FIG. 8) is accommodated. Although details will be described later, the filter case lower portion 33 b and the filter case upper portion 33 a are connected by the upper hinge mechanism 70.

  The filter receiving portion 34 has a shape in which the inner wall surface of the filter case lower portion 33b is offset (the diameter smaller than the inner wall surface of the filter case lower portion 33b) so that the whole is accommodated in the filter case lower portion 33b provided in the outer cylinder 30 It is fixed to the filter case lower part 33b by the claws 37a. The filter receiving portion 34 includes a packing 34 d on the bottom surface, and is in a state of maintaining airtightness with the filter case lower portion 33 b. Further, the upper portion of the filter receiving portion 34 is provided with a flange-like filter contact portion 34e, and when the dust collection filter 32 described later is mounted, the filter reception portion 34e contacts the airtight portion provided on the outer periphery of the dust collection filter 32 The portion 34 and the dust collection filter 32 are in a state in which air tightness is maintained.

<Powder filter>
The dust collection filter 32 is folded in a pleated shape (mountain fold shape) in order to expand a ventilation area, and is adhered to a circular frame. As described above, when the dust collecting filter 32 is attached to the filter receiving part 34, the lower surface side of the packing 32a and the dust collecting filter receiving part 34c provided in the filter receiving part 34 are in contact with each other. It contacts with the airtight surface 33a1 of the upper part 33a. Thus, the filter case upper portion 33a and the filter receiving portion 34 are airtightly sealed with respect to the external space.

  As shown in FIG. 8, the substantially central portion of the filter receiving portion 34 is an opening, and is in fluid communication with an inner cylinder 40 described later.

  FIG. 9 is an external view of the dust collector 10 with the filter case upper part 33a closed (FIG. 9 (a)) and an external view of the dust collector 10 with the filter case upper part 33a open (FIG. 9 (b) )).

  As described above, the filter case upper portion 33 a is connected to the filter case lower portion 33 b by the upper hinge mechanism 70. The upper hinge mechanism 70 has a shaft 61 behind the filter case upper portion 33a, and is constructed by inserting the shaft 61 provided on the filter case upper portion 33a into a shaft hole (not shown) provided behind the filter case lower portion 33b. ing. The shaft hole and the shaft 61 may be provided in the filter case lower portion 33b in a configuration reverse to that of the present embodiment. Further, a lock mechanism 37 is provided in front of the filter case lower portion 33b.

  The lock mechanism 37 is composed of a claw portion 37a of the filter case upper portion 33a and a clamp portion 37b provided on the filter case lower portion 33b. The clamp portion 37b provided in the filter case lower portion 33b is provided with a shaft portion 37c substantially at the center of the side surface, and is provided with a claw portion 37a and a spring shaft on the back side invisible from the appearance. The spring shaft is provided substantially at the center of the lowermost portion of the shaft portion 37c and the clamp portion 37b described above, and the claw portion 37a is provided at the uppermost portion of the clamp portion 37b. The filter case lower portion 33a is provided with a spring shaft clamp receiving portion in which the above-described clamp portion 37b is accommodated, and the spring shaft clamp receiving portion is provided with a spring receiving portion at the lower portion and bearings at the upper left and right. When the spring and the clamp portion 37b are attached to the spring shaft clamp receiving portion, the upper portion of the clamp portion 37b is inclined rearward with the spring close to the natural length. Therefore, by pushing the lower part of the clamp part 37b from the front, the upper part of the clamp part 37b is inclined forward. By closing the filter case upper part 33a from the state where the filter case upper part 33a is opened, the claws 37a provided on the filter case upper part 33a abut on the claws 37a of the filter case lower part 33b. At this time, since the bottom surface of the claw portion 37a provided on the filter case upper portion 33a is inclined, it gets over the claw portion 37a of the filter case lower portion 33b and is contained in the clamp portion, and the filter case upper portion 33a and the filter case lower portion 33b are integrated. Become. Such a locking mechanism 37 can simplify the attachment of the dust collection filter 32.

  If the dust collection filter 32 is not attached, the lock mechanism 37 may be in the way so that the filter case upper part 33a is not closed.

    In assembling the dust collection apparatus, the filter receiving portion 34 is attached to the filter case lower portion 33b, the dust collection filter 32 is placed, and the filter case upper portion 33a is attached to cover. When placing the dust collection filter 32, the mating portion 32a provided on the outer periphery is matched with the notch 33b2 of the filter case lower portion 33b. When the dust collection filter 32 is placed in the filter receiving portion 34, the packing 32a on the outer periphery of the dust collection filter 32 is slightly above the predetermined position of the dust collection filter 32 due to the rising of the lip shape of the packing 32a. In this state, when the filter case upper portion 33a is pivoted in the closing direction, the airtight surface 33a1 of the filter case upper portion 33a is a track that comes off the outside of the packing 32a of the dust collection filter 32.

  In order to suppress this, a rib (pressing rib 62) is provided on the outside of the airtight surface 33a1 of the filter case upper portion 33a to push down the dust collection filter 32 to a predetermined position. In the operation of closing the filter case upper portion 33a, the pressing rib 62 is set so as to first touch the mating portion 32a provided on the outer periphery of the dust collection filter 32, thereby pushing the dust collection filter 32 down to a predetermined position. Is possible.

  Therefore, the pressing rib 62 is provided at a position corresponding to the upper portion of the joint portion 32a provided on the outer periphery of the dust collecting filter 32 in a state where the filter case lower portion 33b and the filter case upper portion 33a are combined, and a notch formed in the filter case lower portion 33b It is within the width of the part 33b2. By providing such a structure, in the dust collection apparatus in which the filter case upper part 33a and the filter case lower part 33b are connected by the upper hinge mechanism 70, it is possible to maintain the airtightness of the dust filter 32 front and rear.

  As shown in FIG. 8, a handle 55 for holding the dust collecting apparatus 10 on the upper surface, a clamp portion 50 for fixing the vacuum cleaner main body 1 to the front, and a clamp portion 50 on the outer appearance surface of the filter case upper portion 33a. Is provided with a button 60 for driving the An opening 39 fluidly connected to the electric blower 14 is provided behind the filter case upper portion 33a.

  As shown in FIG. 4, the opening 39 is connected to the duct 21 via the protective filter and the filter cover 17. Similar to the dust collection filter 32, the filter cover 17 is provided with a packing formed of a rubber member or the like on the front and back surfaces of the outer peripheral portion, and the airtightness between the opening 39 and the duct 21 is maintained.

  The handle 55 of the filter case upper portion 33 a is covered with a lid 19 provided on the cleaner body 1 when the dust collector 10 is mounted on the cleaner body 1. This is to prevent lifting of the handle 55 (see FIG. 2), not the main body handle 18 (see FIG. 1), when carrying the vacuum cleaner body 1.

<Lid 19>
The lid 19 is rotatably supported by a rotary shaft provided on the upper portion of the cleaner body 1 and is provided with a torsion spring (not shown) biased in the direction in which the lid 19 opens in the rotary shaft. .

  When the lid 19 is turned forward from the open state of FIG. 2 (the lid 19 is upright), a twisting force due to the elasticity of a torsion spring is applied, and the claw 19a provided on the front side of the bottom of the lid 19 is The lid 19 is closed by being engaged with the clamp portion 50 of the filter case upper portion 33a. Under the present circumstances, the elastic force which a torsion spring tends to return to an original state is added to the cover body 19, and it can press the dust collector 10 to the cleaner body 1 side as a reaction. With this configuration, the airtight holding of the dust collection device 10 and the cleaner body 1 and the fixation of the dust collection device 10 to the cleaner body 1 are compatible.

  When the button 60 (see FIG. 1) of the filter case upper part 33a is pressed in a state where the lid 19 is closed, the clamp unit 50 is released, the lid 19 is lifted by the elastic force of the torsion spring, and the handle 55 appears. With the handle 55 appearing, the user can easily remove the dust collecting apparatus 10 from the cleaner body 1 by pulling up the handle 55 (see FIG. 2).

  In other words, in a state where the lid 19 is open, the dust collecting apparatus 10 is separated from the cleaner body 1 by pulling up the handle 55. As described above, in the state where the lid 19 is closed, the vacuum cleaner main body 1 can not be lifted by the handle 55, and a malfunction occurs when the vacuum cleaner main body 1 is lifted and when the dust collector 10 is lifted. We are trying to prevent it.

<Inner cylinder 40>
Next, the inner cylinder 40 will be described.

  As shown to Fig.10 (a), the inner cylinder 40 is substantially cylindrical shape, and as above-mentioned, it is provided in the dust collector 10 so that it may become concentric with the outer cylinder 30 substantially.

  The inner cylinder 40 is configured to include an upper inner cylinder 41 having an intake portion 42 provided at the upper portion, and an umbrella portion 44 provided at the lower portion.

<Upper inner cylinder 41>
As shown in FIG. 11, the intake portion (filter portion) 42 of the upper inner cylinder 41 is formed by a lattice-like frame (support bone). The intake portion (filter portion) 42 is a substantially cylindrical portion. In the present embodiment, the frame body (support bone) in the vertical direction is used, but it may be a lattice having a frame body (support bone) in the vertical and horizontal directions. The mesh member 42 a is bridged over the outer peripheral surface of the intake unit 42. The mesh member 42a is held on the frame (support bone) by coating or insert molding or the like. By providing the mesh member 42 a in the intake portion 42, the upper inner cylinder 41 has a filter function and suppresses the inflow of fine dust into the inner cylinder 40. The upper inner cylinder 41 is provided with an opening 41 b in the upward direction. Further, in the upper inner cylinder 41, the outer diameter of the portion located above the intake portion (filter portion) 42 is substantially equal to or less than the outer diameter of the intake portion (filter portion) 42. As a result, the hair wound around the air intake portion (filter portion) 42 can be easily removed by sliding it so as to slide it upward of the inner cylinder 40, and maintenance can be performed easily.

  Here, as shown in FIG. 6, in the present embodiment, the opening 39 fluidly connected to the electric blower 14 is located at the upper portion of the dust collector 10, and this is located on the inner cylinder 40. Do. The hair wound around the air intake portion (filter portion) 42 may be strongly wound on the side having the opening 39 to the electric blower 14 which is the side to be sucked. As in the present embodiment, the outer diameter at the portion where the opening (discharge port) 39 to the electric blower 14 in the upper inner cylinder 41 is approximately the same as or smaller than the outer diameter of the intake portion (filter portion) 42 As a result, the inner cylinder 40 can be easily removed by sliding it so that it can be easily removed.

  Depending on the size and position of each part, the outer diameter of the lower side of the upper inner cylinder 41 may be substantially the same or smaller, or the outer diameter of both sides may be substantially the same or smaller.

In this embodiment, although the mesh member 42a uses polyester, it may be metal (for example, stainless steel or the like), and not a frame (support bone) but a small diameter through hole (a mold having a diameter of about 2 mm) It may be an intake section 42 provided with a plurality of holes). Unlike the case where the mesh member 42a is passed over the frame (stem bone), the through hole is effective against strength and breakage, and there is an advantage that secondary molding is unnecessary. However, when the diameter (opening area) of the through hole is larger than the opening area of the mesh member 42a, it becomes disadvantageous for the inflow of fine dust into the inside of the inner cylinder 40.
Further, as another embodiment, as shown in FIGS. 16 and 17, the inner cylinder 40 includes an upper inner cylinder 41 having an intake portion 42 provided at the upper portion, and an umbrella portion 44 provided at the lower portion. The upper inner cylinder 41 may be an upper inner cylinder 410 having a substantially truncated cone shape. An inner cylinder when the upper inner cylinder 410 is used is referred to as an inner cylinder 400, and an intake unit is referred to as an intake unit 420. The upper inner cylinder 410 is larger in the upper diameter than the lower diameter, in other words, in the shape of an inverted truncated cone. In the upper inner cylinder 410, the diameter on the side close to the electric blower 14 is larger than the diameter on the far side. That is, the diameter of the upper inner cylinder 410 closer to the downstream side (upper side) is larger than the diameter of the side farther from the downstream side (lower side). This is to reduce the pressure loss by increasing the opening area on the downstream side of the inner cylinder 400, which is effective in reducing the loss of the dust collector. In other words, by making the diameter of the upper side closer to the downstream side larger than the diameter of the lower side in the inner cylinder 400, it can be said that generation of loss can be suppressed and the loss reduction is effective.
The upper inner cylinder 410 uses mesh members 420b and 420c having different roughnesses in the upper and lower portions, and the upper mesh member 420b has a coarser mesh size than the lower mesh member 420c. In other words, the mesh openings of the upper mesh member 420b are larger than the mesh openings of the lower mesh member 420c. The mesh member influences the pressure loss, and the coarser the mesh size, the lower the pressure loss. When the air flowing in through the inflow pipe 38 provided in the outer cylinder 30 described above flows downward while swirling, the flow velocity gradually decreases. Therefore, since the centrifugal force is large and the dust is transported in the outer peripheral direction at the upper part where the flow velocity is high, even if the upper mesh member 420 b has a coarse mesh size, it becomes difficult for fine dust to pass through. On the other hand, by making the mesh size of the lower mesh member 420c finer, the passage of fine dust can be suppressed. As described above, the mesh members provided at the intake portion 420 of the upper inner cylinder 410 are changed between the upper and lower portions, and the upper mesh member 420b on the high flow velocity side is made coarse mesh size, which is effective in reducing the loss of the dust collector. is there.
When the mesh members provided in the upper inner cylinder 410 have different mesh sizes in the upper and lower directions, as described above, the frame (support bone) may be formed in a lattice having a frame (support bone) in the vertical and horizontal directions.
The lower portion of the upper inner cylinder 41 has a flange shape, which is larger than the diameter of the umbrella portion 44 when the umbrella portion 44 described later abuts. The flange shape is enlarged by about 1.5 mm in a direction substantially perpendicular to the central axis O from the outer peripheral surface 44 a of the umbrella portion 44 in a state where the umbrella portion 44 is in contact. In other words, since the annular rib is provided at the upper end of the side surface of the umbrella portion 44, the lower flange-shaped portion of the upper inner cylinder 41 is called a first annular rib 44a1.

  As described above, the upper inner cylinder 41 communicates with the opening of the substantially central portion of the filter receiving portion 34 adjacent to the upper side. In the present embodiment, the fixed rail portion 41 a is provided on the upper surface portion (upper surface portion of the upper inner cylinder 41) of the inner cylinder 40. The fixed rail portions 41a are provided at two positions facing the upper surface portion of the upper inner cylinder 41, and have an arc length of approximately 90 degrees. The fixed rail portion 41a is provided for fixing to the fixed claw portion 34a provided on the bottom surface of the filter receiving portion 34, and the fixed rail portion 41a is rotated clockwise around the vertical axis of the inner cylinder 40. Is fixed to the fixing claw portion 34 a of the filter receiving portion 34. Therefore, in the present embodiment, it is possible to remove only the inner cylinder 40 from the dust collection device 10, which is useful when cleaning (care) only the inner cylinder 40. When removing the inner cylinder 40, the fixed rail portion 41 a is disengaged from the fixed hook portion 34 a of the filter receiving portion 34 by rotating the inner cylinder 40 counterclockwise around the vertical axis. The fixed rail portion 41 a provided on the upper surface portion of the upper inner cylinder 41 is smaller than the outer diameter of the upper inner cylinder 41. This has the effect that when the suctioned dust adheres to the upper inner cylinder 41 (when hair or the like is wound around), the fixed rail portion 41a does not get in the way when removing the dust and it is easy to remove the dust. .

  Further, although details will be described later, the lower surface portion of the upper inner cylinder 41 has a convex portion 49, the convex portion 49 is included in the umbrella portion 44, and the umbrella portion 44 has a mechanism sliding in the vertical direction. .

<Umbrella 44>
At the lower part of the inner cylinder 40, an umbrella 44 is provided. The umbrella portion 44 is integrally and concentrically provided with the upper inner cylinder 41 and has a substantially cylindrical shape, and as described above, the upper surface is provided with the concave portion 44 d so as to include the convex portion provided on the lower surface portion of the upper inner cylinder 41. ing. The concave portion 44d is a cylindrical body that forms a convex substantially conical shape in the umbrella portion 44 when viewed in a cross section, and has a tapered shape that tapers from the top toward the bottom surface 46t. Concentrically equipped. The bottom surface 46t of the cylindrical body (concave portion 44d) is closed and formed in a substantially hemispherical shape. In the present embodiment, a hole of about 3.5 mm in diameter is provided on the bottom surface 46t of the cylindrical body 46, and serves as a water draining hole when the dust collecting apparatus is washed with water. By making the cylindrical body (concave portion 44d) into a tapered shape, it becomes a container shape having a space that expands downward together with the tapered portion at the lower end of the outer cylinder 30, so that dust falls off when dumping It becomes easy to do (see FIG. 14). A second annular rib 44a2 and a third annular rib 44a3 are provided on the outer peripheral surface 44a of the umbrella portion 44 substantially horizontally to the first annular rib 44a1 described above. Each annular rib is provided substantially perpendicular to the outer peripheral surface of the umbrella portion, and is provided over the entire circumference of the umbrella portion 44 so as to be substantially perpendicular to the central axis O of the dust collection device 10.

Each annular rib is provided so as to be substantially flush with each anti-return surface of the outer cylinder 30 described above. Each annular rib suppresses or prevents the dust from rising from the air including dust sucked in the outer cylinder 30.
Thus, by making the anti-return surface and the annular rib substantially coplanar, the gap (a distance s4 or s5 described later) formed by the inner wall surface of the outer cylinder 30 and the outer periphery of the annular rib can be reduced. , Has the effect of suppressing the soar of dust. For example, in the case where the anti-return surface and the annular rib are not made substantially flush, the diameter of the annular rib may be increased or the diameter of the outer cylinder 30 may be reduced in order to equalize the aforementioned gap. However, the former reduces the suctioned amount of dust by holding the sucked dust downward by the annular rib, and the latter decreases the volume of the dust because the volume of the outer cylinder 30 decreases. Therefore, if the dust can be suppressed from rising and the amount of suction of the dust does not decrease, the size is not limited to the size of each part shown in the present embodiment, and can be appropriately changed.
The height of the first annular rib 44a1 is, for example, about 1.5 mm (= s1) from the outer peripheral surface 44a of the umbrella portion 44 (see FIG. 10B). The second annular rib 44a2 has a diameter larger than that of the first annular rib 44a1. For example, the second annular rib 44a2 has a height of about 4 mm (= s2) from the outer peripheral surface 44a of the umbrella portion 44, and the first annular rib 44a1 formed on the outer peripheral surface 44a of the umbrella 44 It is formed approximately 2.5 mm higher. The third annular rib 44a3 has a height of about 5 mm (= s3) from the outer peripheral surface 44a of the umbrella portion 44.

  Here, a distance s4 between the annular rib 44a1 of the outer peripheral surface 44a of the umbrella portion 44 and the lower inner peripheral surface 30n1 of the outer cylinder 30 is, for example, about 9 mm. The distance s5 between the third annular rib 44a3 and the lower inner circumferential surface 30n1 of the outer cylinder 30 is also about 10 mm, and is in the range of 9 mm to 10 mm.

  The height of the first annular rib 44a1 and the height of the second annular rib 44a2 are appropriately changed depending on the distance between the umbrella portion 44 and the lower inner circumferential surface 30n1 of the outer cylinder 30.

<Sliding Mechanism of Umbrella 44>
As described above, by providing the mechanism that slides in the vertical direction, the umbrella portion 44 assists in the discharge at the time of discarding the dust.
Next, a sliding mechanism for assisting the discharge of collected dust will be described.

  As shown in FIG. 10A, the sliding mechanism of the umbrella portion 44 forms a spring seat on the convex portion of the lower surface of the upper inner cylinder 41, and the bottom surface 44d1 in the cylinder (recessed portion 44d) at the center of the umbrella portion 44. Is the receiving of the compression spring 47, and transmits the downward elastic force of the compression spring 47 to the umbrella portion 44. Therefore, the compression spring 47 is in a state of being covered by the cylinder (recessed portion 44 d) at the center of the umbrella portion 44. The convex portion 49 provided on the lower surface of the inner cylinder upper portion 41 has a substantially similar shape in which the shape of the cylindrical body (concave portion 44d) of the umbrella portion 44 is offset, and has a claw portion at the lower portion of the convex portion 49. Also has a claw portion. The compression spring 47 is inserted into the recess 44 d, and the projection 49 provided on the lower surface of the inner cylinder upper portion 41 is further inserted. At that time, the upper portion of the compression spring 37 is covered with a spring seat provided on the lower surface of the convex portion 49, and the claw portion overlies the claw portion at the lower portion of the convex portion 49 and the upper portion of the concave portion 44d. 41 and the umbrella part 44 are integrated. The inner cylinder 40 is comprised by such a structure. Therefore, the sliding distance of the umbrella portion 44 depends on the depth of the concave portion 44 d of the umbrella portion 44, and the height of the convex portion 49 of the upper inner cylinder 41 is the sliding distance. In the present embodiment, the sliding distance is the height of the convex portion 49, but it changes as the height of the dust collection device 10, the height of the inner cylinder 40, and the height of the umbrella portion 44 change. It is.

  In such a sliding mechanism, the state where the compression spring 47 is closest to the natural length is the state where the umbrella portion 44 protrudes most from the outer cylinder 30 (see FIG. 14), as shown in FIG. When the bottom lid 31 is closed, the compression spring 47 is compressed. Therefore, when the lock of the bottom lid 31 described later is released at the time of dumping, as shown in FIG. 14, the compression spring 47 is in an extended state close to the natural length, and the umbrella 44 pops out downward, and the umbrella 44 and cylinder Push the dust into the outside space with 46 and so on.

  The umbrella portion 44 is in contact with the bottom surface of the flange portion (first annular rib 44a1) provided at the lower portion of the inner cylinder 40 except at the time of waste disposal such as suction of dust from the suction body 7. The umbrella portion 44 slides downward by the elastic force in the extension direction of the compression spring 47 at the time of waste disposal, and pushes the dust in the outer cylinder 30 toward the lower external space (such as a trash can). In the present embodiment, at the time of dumping, the entire umbrella portion 44 slides downward. This is effective for pulling the dust accumulated between the side surface of the umbrella portion 44 and the inner surface of the outer cylinder 30 downward, and further, dust can be caught by the annular rib to smoothly discharge the dust.

  The upper surface of the umbrella portion 44, which is a sliding mechanism, is located above the waste disposal reference line 90 that indicates the fullness of the dust storage portion 10 provided on the outer peripheral side of the outer cylinder 30, At least the upper part of the outer periphery faces the inner surface of the outer cylinder 30. As a result, it is possible to provide a convenient vacuum cleaner that can easily discharge the dust in the dust collection device when dust is discharged.

<Bottom lid 31>
As shown in FIG. 10 (a), the bottom cover 31 is formed in a dish shape having a depth in which the central portion protrudes downward, and the depressed portion 31b which becomes a recess on the opposite side of the portion projecting in the central portion Have. The bottom lid 31 has a dish shape to give the structure a curvature and improve the strength. Further, the recess 31b of the bottom lid 31 is larger than the spherical radius (curvature) of the spherical shape of the bottom surface 46t of the cylindrical body 46, and the depth of the recess 31b is in a state where the bottom lid 31 is open In the open state perpendicular to the bottom surface 30 (see FIG. 14) (refer to FIG. 14), a surface which becomes horizontal to the recess 31b can not be formed. In other words, the depth of the recess 31b is as shallow as possible. This is to prevent dust from remaining in the hollow portion 31b at the time of waste discharge.

  In the bottom cover 31, a bottom rib 31c is provided as shown in FIG. This is to prevent the dust from rotating in the lower taper in the outer cylinder 30, and to compress the dust downward from the bottom rib 31c as a base point. The bottom rib 31c has a substantially triangular shape which is lower toward the center from the height substantially equal to the depth of the bottom lid 31 on the outer peripheral side in the bottom lid 31 and is disposed on the front side and right and left . The shape of the bottom rib 31c is not limited to the above because the bottom rib 31c is adjusted by the dust collection volume, the shape of the umbrella portion 44, and the like.

  Further, in the present embodiment, the recessed portion 31 b is formed separately from the bottom lid 31, and POM (polyoxymethylene: POM) is used to reduce wear of members due to friction with the cylindrical body 46 at the opening and closing of the bottom lid 31. Although materials such as polyacetal) are used, they may be formed integrally with the bottom lid 31.

  The bottom cover 31 has a rotating shaft 31a on the outer periphery, and a clamp receiver 31d at a position facing the rotating shaft 31a. The rotation shaft 31 a is rotatably attached to the hinge cover 75 of the lower hinge mechanism 71. The lower hinge mechanism 71 has a structure in which the rotary shaft 31a provided on the bottom lid 31 is attached to the hinge cover 75, and the hinge cover 75 is fixed to the hinge cover fixing portion 30f provided on the front lower side of the outer cylinder 30 by a screw or the like. ing. Although the opening and closing of the bottom cover 31 will be described later, the bottom cover 31 is biased to a state in which the bottom cover 31 is opened (see FIG. 14) by providing the rotary shaft 31a with a torsion spring.

Further, the upper hinge mechanism 70 of the filter case upper portion 33a at the upper rear of the outer cylinder 30 is substantially diagonally provided with the hinge structure (lower hinge mechanism 71) of the bottom cover 31 at the lower front of the outer cylinder 30. By this, the center of gravity balance is kept more. The center of gravity balance differs depending on the weight of the filter case upper portion 33a, the axial position of the upper hinge mechanism 70, the outer diameter of the outer cylinder 30, the size of the hinge structure (lower hinge mechanism 71) of the bottom cover 31, etc. The rotation angle or the like of 33a is not limited to this embodiment.
Further, on the bottom surface of the bottom lid 31, a rib 31e is provided on the clamp receiver 31d side (see FIG. 14). In other words, the bottom end of the bottom lid 31 opposite to the lower hinge mechanism 71 has a rib 31 e. This is because the center of gravity can be moved forward by expanding the range in which the bottom surface of the bottom lid 31 contacts the floor surface to the upper hinge mechanism 70 side of the filter case upper portion 33a, and it is easier to balance.

  As described above, when the dust collection device 10 is placed on a floor surface or the like, the dust collection filter 32 is detached due to the structure in which the dust collection device 10 is made to stand by rotating the filter case upper part 33a. Self-supporting in the state where the inner cylinder 40 whole was removed is attained. Thereby, maintenance of the dust collector 10 can be performed easily, and the user-friendly dust collector 10 can be provided.

<Accumulating action of dust in dust collector 10>
Next, the accumulation operation of dust in the dust collection device 10 will be described.

  When the user presses the operation button 5 provided on the operation unit 4 to start the operation, the electric blower 14 operates to suck air from the suction body 7 (see FIG. 1). As described above, air including dust and the like sucked by the suction body 7 (see FIG. 1) flows from the hose attachment port 11 into the introduction pipe 20 in the cleaner main body 1 as shown in FIG. Arrow .beta.1 of 4) passes through the inside of the inlet pipe 20 and reaches the dust collector 10 through the inlet pipe outlet 12 (arrow .beta.2 in FIG. 4).

  The air containing dust and the like that has reached the dust collection device 10 passes through the opening 38 a shown in FIG. 7 and flows into the dust collection device 10. At this time, the gas flows toward the inner circumferential surface of the outer cylinder 30 in a tangential direction while increasing the flow velocity by the diaphragm wall 30 b provided on the downstream side of the opening 38 a. Since the ribs 30c are provided on the throttle wall 30b, the flow colliding with the throttle wall 30b is rectified to suppress an increase in fluid noise generated by the air flow.

  The BB sectional drawing of FIG. 6 which represented the air flow in the dust collector 10 in FIG. 12 is shown.

  The air containing dust and the like which has flowed in the tangential direction of the outer cylinder 30 in the dust collection device 10 becomes a swirling flow as shown by the arrow γ1 in FIG. 12, and the upper inner cylinder is arranged along the inner surface of the outer cylinder 30 in the outer cylinder 30. 41 Turn around. As a result, centrifugal force acts on the dust and the dust is separated from the air. Since dust such as dust is heavier than air, it falls along the inner circumferential surface 30n of the outer cylinder 30 as shown by arrow γ2 in FIG. That is, the dust is separated from the air in the dust separating unit 10A which is the upper part in the dust collecting unit 10. Most of the air from which dust has been separated flows into the inside of the inner cylinder 40 through the air inlet 42 provided in the upper inner cylinder 41 (arrow γ8 in FIG. 12).

  On the other hand, the dust separated by the centrifugal force is conveyed into the dust collection unit 10B through the inlet of the dust collection unit 10B between the outer cylinder 30 and the umbrella portion 44 by gravity and a part of the air flow. . At this time, since the centrifugal force is acting on the dust, the air including the fine dust in the dust collection portion 10B swirls on the bottom cover 31 as shown by an arrow γ3 in FIG.

  Then, when the use of the vacuum cleaner 1 was continued, dust gradually accumulated, and the turning of the dust stopped at the base point rib 31c provided on the bottom lid 31 as a base point, and the dust in the dust container 10B became full. In the state, dust deposits in a donut shape. At this time, dust also deposits between the umbrella portion 44 and the cylinder 46. The air that has flowed into the dust collection unit 10B flows from near the outer periphery of the umbrella portion 44 toward the upper inner cylinder 41 along the shapes of the cylindrical body 46 and the umbrella portion 44. Specifically, it rises while turning along the wall surface of the inverted triangular pyramidal cylinder 46, passes through the inside of the umbrella portion 44, and rises while turning along the outer peripheral surface of the umbrella portion 44 (FIG. 12) Arrow γ4).

  The arrow γ4 hits the third annular rib 44a3 of the umbrella portion 44, and a swirling flow around the third annular rib 44a3 is generated (arrow γ5 in FIG. 12). Dust is separated by centrifugal force due to the swirling flow and falls to be deposited on the lower portion in the outer cylinder 30. In addition, an upward air flow is generated over the third annular rib 44a3 (arrow γ5a in FIG. 12). At this time, by providing the third annular rib 44a3 on the same plane as the third anti-return surface 30d3 under the outer cylinder 40 as in the present embodiment, the inner wall surface of the outer cylinder 30 and the outer periphery of the third annular rib 44a3 The desired gap is set between them, and the effect of suppressing the dust rising is exerted.

  Furthermore, the air containing fine dust that has passed over the third annular rib 44a3 further rises along the outer peripheral surface 44a of the umbrella portion 44, but hits the second annular rib 44a2 of the umbrella portion 44, and the second annular rib 44a2 A swirling flow around the vicinity is generated (arrow γ6 in FIG. 12). Dust is separated by centrifugal force due to the swirling flow and falls to be deposited on the lower portion in the outer cylinder 30 (arrow γ6a in FIG. 12). Similar to the third annular rib 44a3, by providing the second annular rib 44a2 on the same plane as the second anti-return surface 30d2 at the lower part of the outer cylinder 40 as in the present embodiment, the inner wall surface of the outer cylinder 30 and A desired gap is set between the second annular rib 44a2 and the outer periphery of the second annular rib 44a2 to suppress dust from rising.

  Similarly, air containing fine dust that has passed over the second annular rib 44a2 further rises along the outer peripheral surface 44a of the umbrella portion 44, but hits the first annular rib 44a1 provided on the inner cylinder bottom portion, and the first circle A swirling flow around the annular rib 44a1 is generated (arrow γ7 in FIG. 12). Dust is separated by centrifugal force due to the swirling flow and falls to be deposited on the lower portion in the outer cylinder 30 (arrow γ6a in FIG. 12). Like the second annular rib 44a2 and the third annular rib 44a3, by providing the first annular rib 44a1 on the same plane as the first anti-return surface 30d1 of the lower part of the outer cylinder 40 as in the present embodiment A desired gap is set between the inner wall surface of the outer cylinder 30 and the outer periphery of the first annular rib 44a1, and the dust is suppressed from rising.

  Dust is pushed to the inner peripheral surface side of the outer cylinder 30 by centrifugal force by the flow of these arrows γ5, γ6 and arrow γ7, and dust is moved to the dust storage portion by the flow of arrow γ2 flowing into the dust storage portion 10B. Deposit below 10B.

  Then, the air from which dust is removed by the third annular rib 44a3, the second annular rib 44a2 and the first annular rib 44a1 is sucked into the intake portion 42 of the upper inner cylinder 41 as shown by the arrow γ8 in FIG. The air flows into the duct inlet 13 (see FIGS. 3 and 4) of the cleaner body 1 and is exhausted to the external space of the cleaner body 1 as described above.

  As described above, the rising of the dust can be suppressed by the annular ribs provided on the umbrella portion 44 and the anti-return surfaces provided on the outer cylinder 30, and the dust can be compressed downward.

  Then, when the dust reaches the predetermined waste disposal reference line 90, the waste disposal is performed. As described above, even when the amount of dust suctioned is small, the dust discharging mechanism promotes discharge of dust by the dust discharging mechanism of the umbrella portion 44 to be performed smoothly. In the state where the dust is fully accumulated in the dust container 10B, the dust is also accumulated between the inner peripheral surface of the outer cylinder 30 and the side surface of the umbrella portion 44, but the entire umbrella portion 44 moves downward when discharging dust. In this case, dust can be easily pushed downward, and each annular rib can be pushed downward so as to hook the dust, so that dust can be discharged smoothly.

<Operation when dumping garbage>
13 is a cross-sectional view taken along the line A-A of FIG. 5 with the bottom cover 31 closed, and FIG. 14 is a cross-sectional view taken along the line A-A of FIG. 5 when the dust is discharged (the bottom cover 31 is opened). Show.

  In the above-mentioned waste discharge mechanism, the operation at the time of waste disposal will be described.

  The bottom lid 31 is released by pressing the dust discarding button 35a provided on the upper portion of the handle 35 provided on the dust collection device 10 (see FIG. 14). The bottom cover 31 is provided with a rotary shaft 31a rotatably supported by the cleaner body 1 on the opposite side of the handle 35, while an opening / closing mechanism of the bottom cover 31 is provided on the handle 35 side.

  When the trash disposal button 35a provided on the upper portion of the handle 35 is pressed, the rod 80 in the handle 35 moves downward, the claw portion 83 of the slide clamp 81 is released, and the bottom lid 31 is opened.

  The rotary shaft 31a of the bottom lid 31 is provided with a torsion spring for urging the bottom lid 31 in the direction to open the bottom lid 21. When the claws 83 are released, the bottom lid 21 is opened by the elastic force of the torsion spring (see FIG. 14). . When the waste disposal button 35a is released, the spring 80b provided on the slide clamp 81 returns to the natural length, so that the rod 80 returns upward and the slide clamp 81 returns to the position before the waste disposal button 35a was pressed.

  At the same time as the bottom cover 31 is opened, the compression spring 47 causes the umbrella portion 44 including the cylinder 46 to pop downward. Thereby, the position where the bottom cover 31 is opened is closer to the opening 30 a of the lower surface of the outer cylinder 30 than the position where the bottom cover 31 is closed, the umbrella portion 44 which is a part of the inner cylinder 40 (See FIG. 14).

  After discarding the waste, when the bottom lid 31 is closed, the bottom surface 46t of the cylindrical body 46 protruding downward contacts the hollow portion 31b provided at the center of the bottom lid 31, and the umbrella portion 44 is pushed upward.

  Since the bottom 46t of the cylinder 46 and the recess 31b contact each other with a spherical curvature, the contact area between the bottom 47 of the cylinder 46 and the recess 31b can be obtained even if the angle of the bottom lid 31 is changed by closing the bottom lid 31. The umbrella portion 44 can be smoothly fitted since the force can be constantly applied in the vertical direction by keeping the curved surfaces in contact with each other.

  Then, when the bottom lid 31 is closed to a substantially horizontal state, the clamp receiver 31d contacts the claws 83, the slide clamp 81 moves in the direction in which the spring provided on the slide clamp 81 is contracted, and the claws 83 are clamp receiver 31d The spring is returned when overcoming, and the bottom lid 31 is locked in a state in which air tightness is maintained.

<Operation at the time of maintenance of the dust collector 10>
After dust disposal, when dust remains in the dust collecting device 10, particularly when long hair and the like are wound around the inner cylinder 40 mesh member 42a, the dust collecting device 10 of this embodiment is the inner cylinder 40 from below the dust collection device 10. It is possible to remove only. Moreover, the upper part of the removed inner cylinder 40 is the shape which the nail | claw part 37a protruded inside diameter side. Therefore, when long hair and the like are wound around the inner cylinder 40, it is not a countermeasure such as cutting and removing the hair with a scissors or the like, but removing the wound hair by sliding the hair upward to the inner cylinder 40 Can be easily maintained. If the claws 37a at the upper portion of the inner cylinder 40 are on the outer circumferential side, the wound hairs are slid upward, and the hairs are caught on the claws 37a, so that they can not be easily maintained. In addition, when maintenance of the dust collection filter 32 is required, it is necessary to open the filter case upper part 33a. The filter case upper portion 33a is connected to the outer cylinder 30 by the upper hinge mechanism 70, and is stably fixed in a state where the filter case upper portion 33a is rotated approximately 90 degrees. Therefore, the dust collection filter 32 is removed without pressing the filter case upper part 33a, but in a state where the dust collection filter 32 is removed from the dust collection device 10, the outer cylinder 30 is turned even when the filter case upper part 33a is rotated about 90 degrees. Even if you place it on the floor, it will stand on its own.

  The present invention is not limited to the above-described embodiment, but includes various embodiments. For example, the above-described embodiment is an easy-to-understand description of the present invention, and is not necessarily limited to one having all the described configurations. For example, it may include part of the described configuration.

DESCRIPTION OF SYMBOLS 1 cleaner body, 1a upper case, 1b lower case, 10 dust collection device, 10A dust separation part, 10B dust storage part, 11 hose attachment port (main body intake port), 12 introduction pipe outlet, 13 duct inlet part, 14 electric Blower, 17 filter cover, 19 lid, 20 inlet tube, 21 duct, 30 outer cylinder, 30d1 to 30d3 anti-return surface, 31 bottom lid 2 dust collecting filter, 33 filter case, 34 filter receiving portion, 35 handle, 37 lock Mechanism, 37a tab portion, 37b clamp portion, 37c shaft portion, 37d clamp tab portion, 37e spring shaft, 37f clamp receiver portion, 38 inflow tube, 38a opening portion, 38b aperture portion, 38b 1 first longitudinal side, 38b 2 second Longitudinal side, 38b3 first lateral side, 38b4 second lateral side, 39 openings, 40,400 inner cylinder, DESCRIPTION OF SYMBOLS 0a Flange part, 41,410 Upper inner cylinder (frame) 42,420 intake part, 42a mesh member, 420b upper mesh member, 420c lower mesh member, 44 umbrella part, 44a outer peripheral surface, 44a1 to 44a3 annular rib, 46 cylinder, 46t bottom, 48c1 slit, 48j spring shaft, 50 clamp part, 55 handle, 60 button, 61 shaft, 62 pressing rib, 70 upper hinge mechanism, 71 lower hinge mechanism, 75 hinge cover, 76 discharge port, 80 rods, 81 slide clamps, 83 claws, γ1 to γ8 air flow, O central axis, S electric vacuum cleaner,

Claims (1)

And a vacuum cleaner body provided with an electric blower, and a dust collector detachably attached to the vacuum cleaner body,
The dust collecting apparatus includes an outer cylinder having an opening at a lower portion, and an inner cylinder provided in the outer cylinder,
The inner cylinder has a frusto-conical frame and a lower umbrella portion of the frame;
The frusto-conical frame has an upper diameter larger than a lower diameter,
A mesh member is stretched over the truncated cone-shaped frame, and the mesh member has a smaller opening at the lower portion than at the upper portion.

Images