JP6488137B2 - Electric vacuum cleaner - Google Patents

Description

  The present invention relates to a vacuum cleaner.

  In recent years, the form of vacuum cleaners has diversified. In addition to conventional floor-moving vacuum cleaners and vertical vacuum cleaners, robot vacuum cleaners and futon cleaners only, vertical (stick type) and handy type cleaners are available. There are machines. Among them, the stick-type and handy-type vacuum cleaners mentioned above are generally called DC stick vacuum cleaners, and there are many products equipped with storage batteries such as nickel-hydrogen batteries and lithium-ion batteries, and their usability is popular. And demand growth is large.

Such a DC stick vacuum cleaner is driven by an electric blower driven by a storage battery, the dust-containing air sucked from the suction body is guided to the vacuum cleaner main body, and collected through a dust collector in the main body of the vacuum cleaner to be cleaned. The air is exhausted outside the vacuum cleaner body. The DC stick vacuum cleaner is required to be small and light, and the dust collector needs to be miniaturized. Therefore, when the cyclone type is adopted for the dust collector, there is a problem that the suction force decreases when the amount of collected dust increases.
In response to this problem, Japanese Patent Application Laid-Open No. 2013-31598 discloses a cyclone dust collector capable of compressing dust in a dust collector and suppressing the return of dust, and a vacuum cleaner equipped with the cyclone dust collector. The cyclone dust collector has a cylindrical primary filter arranged concentrically in a cylindrical dust box body, an umbrella-shaped extension is provided at the lower part thereof, and an umbrella-shaped extension is provided inside the umbrella-shaped extension. A cylindrical wall projecting longer than the lower end of the extension is formed.

JP 2013-31598 A

  The cyclone dust collector like patent document 1 is preventing the dust from returning to the primary filter side with the cylindrical wall formed inside the umbrella-shaped extension part, but the inner wall of a dust box main body. As the dust re-appears along the line, there is a risk of problems in sustaining the suction force.

  Therefore, an object of the present invention is to provide an electric vacuum cleaner equipped with a cyclone type dust collecting device that can be used as a stick type or a handy type, suppresses rebound, and is small and light and can maintain suction power. It is in.

In order to solve the above problems, a vacuum cleaner according to the present invention includes a vacuum cleaner body including a main body air inlet that sucks in air containing dust and an electric blower that generates suction power, and the air inlet and the electric blower. A vacuum cleaner having a substantially cylindrical outer cylinder that forms an outer shell and an inner cylinder that is concentrically provided in the outer cylinder. The outer cylinder inner wall is provided with a dust return prevention surface formed in a direction substantially perpendicular to the central axis of the outer cylinder, and the largest diameter portion of the inner cylinder is larger than the dust return return surface. It is located above .

  A vacuum cleaner main body including a main body intake port for sucking air containing dust and an electric blower that generates suction force; and a detachable dust collector between the intake port and the electric blower, The dust collector is a vacuum cleaner having a substantially cylindrical outer cylinder that forms an outer shell and an inner cylinder that is concentrically provided in the outer cylinder, and the inner wall of the outer cylinder includes a center of the outer cylinder. A dust return return surface formed on the outer side of the shaft is provided, and the outer cylinder has a shape that expands downward from the dust return return surface in a substantially conical shape.

  The dust return return surface is formed in a substantially horizontal direction with respect to the central axis of the outer cylinder.

  Further, the dust return return surface includes a substantially annular rib protruding downward.

  ADVANTAGE OF THE INVENTION According to this invention, the vacuum cleaner provided with the cyclone type dust collector which can suppress a rebound, is small and lightweight, and can maintain attraction | suction force can be provided.

It is an external appearance perspective view which shows the whole at the time of accommodation of the vacuum cleaner of embodiment of this invention. It is an external appearance perspective view which shows the whole at the time of using the cleaner body of embodiment of this invention as a stick type. It is an external appearance perspective view of the state which folded the handle of the cleaner body of an embodiment of the present invention. It is an external appearance perspective view of the charging stand of embodiment of this invention. It is the external appearance perspective view which removed the suction body of the cleaner body of embodiment of this invention. It is a right view of the cleaner body at the time of using as a handy type of an embodiment of the present invention. It is a center sectional view of the cleaner body shown in Drawing 6 of an embodiment of the present invention. It is an external appearance perspective view in the case of using a tip brush when using it as a handy main body of an embodiment of the present invention. It is an external appearance front view of the dust collector of the embodiment of the present invention. It is an exploded view of the dust collector of the embodiment of the present invention. It is AA sectional drawing of the dust collector shown in FIG. 9 of embodiment of this invention. It is a front view of the inner cylinder of the embodiment of the present invention. It is an exploded view of the inner cylinder of the embodiment of the present invention. It is BB sectional drawing of the inner cylinder shown in FIG. 12 of embodiment of this invention. It is the front view which opened the bottom cover in the outer cylinder of embodiment of this invention. It is the right view which opened the bottom cover in the outer cylinder of embodiment of this invention. It is CC sectional drawing of the outer cylinder shown in FIG. 16 of embodiment of this invention. It is DD sectional drawing of the outer cylinder shown in FIG. 16 of embodiment of this invention. It is sectional drawing which shows another shape of the dust return return surface of embodiment of this invention. It is sectional drawing which shows another shape of the dust return return surface of embodiment of this invention. It is EE sectional drawing of the dust collector shown in FIG. 11 of embodiment of this invention. In FIG. 21, it is sectional drawing which showed the operation | movement at the time of garbage disposal. It is the perspective view which showed only the dust collector and inlet tube of the cleaner body in embodiment of this invention. It is the front view which showed the dust collector and the introductory tube in embodiment of this invention. It is FF sectional drawing shown in FIG. 24 in embodiment of this invention. It is the bottom view which showed the dust collector and the introductory tube in embodiment of this invention. It is GG sectional drawing shown in FIG. 6 in embodiment of this invention. It is a flow of the air inside the cleaner body in the embodiment of the present invention. It is a front view of the vacuum cleaner in the state where the telescopic pipe is extended and the handle is not rotated in the embodiment of the present invention. It is a front view of the vacuum cleaner of the state which shortened the expansion-contraction pipe and rotated the handle in embodiment of this invention.

  Hereinafter, typical embodiments of the present invention will be described in detail with reference to the drawings as appropriate. However, the present invention is not limited to the following embodiments. Hereinafter, as shown in FIG. 1 and the like, the direction in which the handle 2 is located when the vacuum cleaner 100 is used as a stick type is defined as the upward direction, and the direction in which the suction port 15 is disposed is defined as the downward direction. In the cleaner body 1, the direction in which the motor case portion 7 and the storage battery case portion 8 are located is the upward direction, and the direction in which the suction port 15 is located is the downward direction. Moreover, as shown in FIG. 1 etc., let the side in which the expansion-contraction pipe 5 (pipe case part 4) of the vacuum cleaner 100 is located be a front direction, and let the direction in which the dust collector 12 is located be a rear direction. Further, in the vacuum cleaner 100, the right direction and the left direction are defined with reference to the front as the front, and the left side is the right direction and the right side is the left direction on the paper surface of FIG. As shown in FIG. 5 and the like, also in the explanation when the suction body 3 is detached from the electric vacuum cleaner 100 and used as a handy type, the side where the suction opening 15 of the cleaner body 1 is located is directed downward, and the pleat filter The side where 130 is located will be referred to as the upward direction, the side where the pipe case part 4 will be located as the front direction, the side where the dust collector 12 is located as the rear direction, the left side of the page as the right direction, and the right side as the left direction. Further, the up / down / left / right / front / rear directions of the charging stand 6 shown in FIG. 4 and the like and the dust collector 12 shown in FIG.

  First, the overall configuration of the embodiment 100 of the present invention will be described.

  The vacuum cleaner 100 according to this embodiment is used in a state where the handle 2 is not rotated with respect to the telescopic pipe 5 as shown in FIGS. 1, 2, and 5, and as shown in FIGS. 3 and 6 to 8. The handle 2 can be used in two main states, ie, the handle 2 is rotated with respect to the telescopic pipe 5.

FIG. 1 is an external perspective view showing a vacuum cleaner 100 during storage and charging in an embodiment of the present invention. FIG. 2 is an external perspective view when the vacuum cleaner 100 is used as a stick type in the embodiment of the present invention. FIG. 3 is an external perspective view of the electric vacuum cleaner 100 with the handle folded in the embodiment of the present invention.
<Vacuum cleaner 100>
1 is a vacuum cleaner, and 6 is a charging stand. The electric vacuum cleaner 100 includes a vacuum cleaner body 1, a suction body 3, and a dust collector 12. The mouthpiece 3 is detachably provided at the lower end of the cleaner body 1. The dust collector 12 is detachably provided at the rear part of the cleaner body 1.

In addition, although the vacuum cleaner 100 of this embodiment is a rechargeable vacuum cleaner that charges the storage battery 18 with the charging stand 6 and uses it as a power source, the vacuum cleaner body 1 includes a power cord and is used commercially. You may use as an AC type vacuum cleaner.
<Vacuum cleaner body 1>
Next, the structure of the cleaner body 1 in the present embodiment will be described.

  The cleaner body 1 includes a case body 50 having a motor case portion 7, a storage battery case portion 8, a pipe case portion 4, and an introduction pipe case portion 14, and a handle 2.

  The motor case portion 7 is a substantially cylindrical portion. The storage battery case part 8 is a substantially box-shaped part. The pipe case part 4 is a substantially cylindrical part. The motor case portion 7 includes an electric blower 17 (see FIG. 7). The storage battery case 8 contains a storage battery 18 (see FIG. 7). The pipe case portion 4 can contain an expandable pipe 5. An introduction pipe 160 is included in the introduction pipe case section 14.

  The arrangement of each part in the cleaner body 1 is as follows.

  As shown in FIGS. 1, 2, and 5, the handle 2 is not rotated and the handle 2 is positioned at the upper portion of the cleaner body 1, and the suction port 15 is positioned at the lower portion. doing. A motor case portion 7 is located at the upper rear portion of the pipe case portion 4. A storage battery case portion 8 is located at the rear upper part of the pipe case portion 4 and behind the motor case portion 7. The introduction pipe case part 14 is located in the right direction of the pipe case part 4.

  Further, a suction body attaching / detaching button 13 is provided at a lower portion of the cleaner body 1 (pipe case portion 4). The mouthpiece 3 can be detached from the cleaner body 1 by pressing the mouthpiece attaching / detaching button 13.

  The handle 2 has operation buttons 11a and 11b, and has a telescopic pipe 5 provided below the handle 2 so as to be stretchable in the vertical direction. Further, the handle 2 includes a mechanism (handle support shaft 24) that is rotatable with respect to the telescopic pipe 5. By retracting the telescopic pipe 5 and rotating the handle 2 with respect to the telescopic pipe 5, the suction body 3 can be removed from the cleaner body 1 and the vertical direction of the cleaner body 1 can be made compact and usable as a handy type. In addition, you may use in the state (state shown in FIG. 3) which attached the suction body 3 and rotated the handle | steering-wheel 2 with respect to the expansion-contraction pipe 5, and was made compact.

  In addition to the mouthpiece 3, an applied mouthpiece 30 may be attached. The applied suction body 30 is used by being attached to the suction port 15, and the tip of the applied suction body 30 is smaller than the distal end of the suction body 3 so that the narrow place where the suction body 3 does not enter can be cleaned. Is desirable. Moreover, in order to clean a high place which cannot reach with a handy type | mold, it is desirable that it is a structure which can be expanded-contracted.

  Next, the structure of the handle | steering-wheel 2 and the expansion-contraction pipe 5 of the embodiment of this invention is demonstrated. As described above, the handle 2 has the operation buttons 11a and 11b, and since the operation button 11b is provided, the handle 2 is rotated by approximately 180 ° as shown in FIG. ) And the operation button 11b comes out on the surface of the vacuum cleaner even when used as a handy type, the power can be easily turned on and off.

  The surface of the handle 2 is preferably made of a soft material such as a thermoplastic resin so that the user can easily hold it by hand. Further, it is desirable to provide a handle non-slip shape or the like so that the cleaner body 1 does not slip when the user is cleaning.

  FIG. 5 is a perspective view of the vacuum cleaner 1 in a state where the telescopic pipe 5 is retracted and stored in the telescopic pipe portion 4 and the suction body 3 is removed, and FIG. 6 is a pipe case portion in which the handle 2 is rotated with respect to the telescopic pipe 5. The side view which looked at the vacuum cleaner main body 1 of the state fixed to 4 from the right side is shown.

  The handle 2 is rotatably supported by a handle support shaft 24 provided at one end of the telescopic pipe 5. When the electric vacuum cleaner 100 is used as a stick type, the handle 2 is raised (not rotated), the extension pipe 5 is extended, and the floor surface is cleaned. The details of the fixing structure and the rotation mechanism inside the handle support shaft 24 are omitted. However, when the handle support shaft 24 is pressed, the lock of the rotation mechanism is released, and the handle 2 is moved forward with the handle support shaft 24 as the center. It turns to (pipe case part 4 side).

  The extendable pipe 5 is supported in an extendable manner in a pipe case portion 4 provided in the cleaner body 1. Although details on the expansion and contraction and locking mechanism of the expansion and contraction pipe 5 are omitted, the expansion and contraction pipe 5 expands and contracts in the vertical direction when the expansion and contraction button 10 is pressed. Moreover, when the user is using the cleaner main body 1, the lock mechanism is provided so that the expansion-contraction pipe 5 may not shrink. In addition, you may enable it to adjust the expansion-contraction length of the expansion-contraction pipe 5 in multiple steps.

  As described above, when the vacuum cleaner 100 is used as a handy type by the expansion / contraction mechanism of the expansion / contraction pipe 5 or the rotation mechanism of the handle 2, the expansion pipe 5 is contracted arbitrarily by the user, the handle 2 is folded, and the form is changed. Can be changed. In addition, by using a handy type, it can be stored in a low height place.

  Then, the state at the time of using the cleaner main body 1 of the embodiment of this invention as a handy type is demonstrated.

The pipe case portion 4 provided on the front side of the cleaner body 1 is provided with a handle fixing clamp 101 urged upward by a handle clamp spring 108. The handle fixing clamp 101 can be fitted to a protrusion (not shown) provided at the end of the handle 2 to fix the handle 2 to the pipe case portion 4. When the handle fixing clamp 101 is slid downward, the handle fixing clamp 101 is detached from the protrusion, and the handle 2 can be rotated in a direction away from the cleaner body 1.
<Tip brush 20>
A tip brush 20 that is rotatable with respect to the tip is provided at the tip (lower side) of the cleaner body 1. The tip brush 20 has a brush portion in three directions. Further, a brush portion is provided on the rear side of the front end portion of the cleaner body 1. As shown in FIG. 5, when the tip brush 20 is rotated to store it, the brush portion of the tip brush 20 faces upward, and the brush portion of the tip portion of the cleaner body 1 faces forward. Become. When the tip brush 20 is rotated to use the tip brush 20 as shown in FIG. 8, the brush portion of the tip brush 20 and the brush portion of the tip portion of the cleaner body 1 are both facing forward, and the two brush portions are in contact with each other. In addition, it is provided so as to surround the periphery of the suction port 15. By rotating the tip brush 20 so that both brush portions are on the cleaning surface side, the clearance with the cleaning surface is reduced, the suction performance is improved, and cleaning can be performed without damaging the cleaning surface.
<Charging stand 6>
The structure of the charging stand 6 in the present embodiment will be described. FIG. 4 shows an external perspective view of the charging stand 6.

  The charging stand 6 includes a base portion 25 and a stand portion 26, and the stand portion 26 is detachable from the base portion 25. Note that the base portion 25 and the stand portion 26 do not have to be detachable, but are desirably detachable in order to improve storage and packing properties.

  The base portion 25 has a substantially box shape. The base portion 25 includes a power cord at the rear, and has a charging board (not shown) inside. A weight (not shown) is provided inside the base portion 25. A rear end of the base portion 25 is provided with a substantially cylindrical applied suction body fixing protrusion 32 protruding upward. The applied suction body 30 can be inserted and stored in the applied suction body fixing protrusion 32. The base portion 25 is a portion on which the suction body 3 is placed. Therefore, the area of the upper surface of the base portion 25 is desirably larger than the area of the mouthpiece 3.

  The stand part 26 has a substantially box-shaped part and a substantially semi-cylindrical part located on the box-shaped part. On the upper surface of the stand portion 26 (the upper surface of the substantially semi-cylindrical portion of the stand portion 26) is a protruding charging terminal terminal portion 28.

  The power cord and the charging board in the base portion 25 and the charging stand terminal portion 28 of the stand portion 26 are electrically connected by wiring (not shown). The wiring is accommodated inside the base portion 25 and the stand portion 26.

The protrusion-shaped charging stand terminal portion 28 can be fitted to a recessed main body terminal portion 9 of the vacuum cleaner main body 1 to be described later. At this time, the charging base terminal portion 28 and the main body terminal portion 9 are fitted and fixed in a conductive state. The storage battery 18 can be charged by fitting the charging stand terminal portion 28 and the main body terminal portion 9 in a state where the power cord of the charging stand 6 is connected to a commercial power outlet. When the power cord is not connected to the outlet, the charging stand 6 can be used as a storage stand when the cleaner body 1 is fixed and stored. Due to the weight inside the base portion 25, there is an effect that the vacuum cleaner main body 1 is not easily collapsed when it is fixed.
<Motor case 7 and storage battery case 8>
Next, the structure of the motor case part 7 and the storage battery case part 8 of the embodiment of this invention is demonstrated using FIG. FIG. 7 is a central sectional view of the handy type shown in FIG. An electric blower 17 is disposed in the center of the motor case portion 7. In a handy form in which the handle 2 is fixed to the pipe case portion 4, the motor case portion 7 and the storage battery case portion 8 are arranged behind the handle 2. Further, a dust collector 12 described later is attached below the motor case portion 7. The center of gravity of the entire vacuum cleaner main body 1 to which the dust collecting device 12 is attached is close to the handle 2 fixed to the pipe case portion 4 and is easy to hold even in a handy form. In this embodiment, the storage battery case portion 8 is disposed behind the motor case portion 7. However, the present invention is not limited to this, and the storage battery 18 may be disposed so as to surround the electric blower 17 or around the electric blower 17. You may arrange | position to both right and left. Moreover, the storage battery case part 8 is provided with a main body terminal part 9 for charging the storage battery 18, and is fitted into the charging stand terminal part 28 of the charging stand 6 described above to conduct electricity to charge the storage battery 18. Can do.

  Around the electric blower 17, there is a fixed case 109 for fixing the electric blower 17, and the main body substrate 110 that controls the vacuum cleaner main body 1 is fixed to the upper portion of the fixed case 109, and covers the motor case portion. 7 is formed. Depending on the arrangement of the storage battery 18, the main body substrate 110 may be provided in front of, on the side of, or below the fixed case 109.

  A main body LED 111 is provided above the motor case portion 7. The main body LED 111 can illuminate two colors, red and green, and can display the operation state of the cleaner body 1 and the charging state of the storage battery 18. The number of colors of the main body LED 111 may be one color or two or more, and depending on the combination of lighting and blinking, the charging completion state of the storage battery 18 and the operation error state of the vacuum cleaner 100 may be displayed, or the design may be lit or blinking. good.

  Moreover, as shown in FIG. 6, the side surface (right side surface in the present embodiment) of the motor case portion 7 is provided with an exhaust port 106, and an exhaust filter (not shown) is provided therein. In the present embodiment example, since the user is assumed to be right-handed, the exhaust port 106 is provided on the right side of the cleaner body 1 to prevent the exhaust from directly hitting the user. An exhaust port 106 may be provided on the left side to handle the case where the user is left-handed, or the amount of exhaust directly hitting the user can be reduced by disposing the air volume of the exhaust not only on one side but also on the left and right sides. It may be suppressed. It is desirable that the exhaust port 106 has a lattice shape that is substantially parallel to the longitudinal direction of the cleaner body 1. When the user is using as the handy type, there is an effect that the exhaust of the electric blower 17 does not directly hit the user. In addition, when used as a handy type, the vacuum cleaner body 1 may be temporarily placed on the floor or the like, but even if liquid such as water is accidentally spilled from the front of the vacuum cleaner body 1, the motor It is possible to prevent liquid from entering the inside of the case portion 7 and prevent the electric blower 17 and the storage battery 18 from being broken.

  Below the motor case portion 7, a suction portion 113 that communicates the electric blower 17 and the dust collector 12 is provided, and an airtight surface 112 for maintaining the airtightness between the motor case portion 7 and the dust collector 12 at the end surface. Have A protective cover 115 is provided in the ventilation channel of the suction portion 113, and a protective filter (not shown) is provided on the upstream side of the protective cover 115. The protective filter prevents dust from entering the electric blower 17 when it is erroneously operated with the dust collector 12 removed. Moreover, it is desirable that the protective filter is made of a material that is detachable and washable so that it can be cleaned when it becomes dirty. The protective filter has a notch in a part thereof, and the protective filter is fixed by passing the notch through a protrusion (not shown) provided in the protective cover 115. It is desirable that the protective cover 115 has a lattice shape including holes having a size that does not allow a finger or the like to enter so that the user's finger does not touch the electric blower.

An anti-vibration airtight rubber 116 made of an elastic seal member such as rubber is provided on the upstream side of the electric blower 17, and the antivibration airtight rubber 116 is in close contact with the flat surface of the outer periphery of the protective cover 115 to ensure airtightness. be able to. Further, since the vibration-proof and airtight rubber 116 is fixed together with the electric blower 17 in the fixed case 109, it also plays a role of absorbing rotational vibration generated by driving the electric blower 17.
<Dust collector attachment / detachment mechanism>
Next, the structure of the dust collector attachment / detachment mechanism (D lock button 119) of the embodiment of the present invention will be described.

  The pipe case portion 4 is provided with a dust collector fixing projection 117 for fixing the dust collector 12, and the motor case portion 7 is provided with a dust collector fixing hole 118 for fixing the dust collector 12. The dust collector 12 is provided with a D lock button 119 biased by a D lock button spring 120. The dust collector fixing projection 117 is inserted into the recess 159 on the bottom surface of the dust collector 12, and the dust collector fixing projection 117 is rotated forward (to the pipe case 4 side) from the starting point, so that the D lock button 119 is moved to the dust collector. The dust collector 12 is attached to the cleaner body 1 by being hooked in the fixing hole 118.

  When removing the dust collector 12, the D lock button 119 is slid downward to be removed from the dust collector fixing hole 118, and rotated in the direction opposite to that when the dust collector 12 is attached. The fixing projection 117 can be removed.

Then, the structure of the dust collector 12 of embodiment of this invention is demonstrated.
<Dust collector 12>
The dust collector 12 has a function of separating dust containing air sucked from the suction body 3 or the suction opening 15 into dust and air and collecting the dust.

  9 is a front view of the dust collector 12 as seen from the front of the cleaner body 1 (pipe case portion 4), FIG. 10 is an exploded view of the dust collector 12 shown in FIG. 11, and FIG. 11 is a dust collector shown in FIG. 12 shows an AA cross-sectional view.

The dust collector 12 is generally formed of an outer cylinder 128, an inner cylinder 129, a dust collection filter 130, a filter case 131 that houses the dust collection filter 130, an upper lid 132, and a bottom lid 133. The inner cylinder 129 and the filter case 131 are integrated, and the filter case 131 is provided above the inner cylinder 129. The outer cylinder 128 is a cylinder body that is open at the top and bottom. The bottom of the outer cylinder 128 is provided with a bottom cover 133, and the filter case 131 integrated with the inner cylinder 129 is inserted through the opening at the top of the outer cylinder 128. The dust collecting filter 12 is formed by housing the dust collecting filter 130 in the filter case 131 and fastening the upper cover 132 to the upper portion of the outer cylinder 129 and integrating them. At this time, the inner cylinder 129 is mounted so as to be substantially concentric with the outer cylinder 128. When the inner cylinder 129 is attached to the outer cylinder 128, a space for separating and storing dust is provided between the outer cylinder 128 and the inner cylinder 129. Of the space formed by the outer cylinder 128 and the inner cylinder 129, the upper part is a dust separator 134 and the lower part is a dust container 135. The dust separation unit 134 is a space that separates dust from the air carrying the dust, and the dust storage unit 135 is a space that collects and stores dust.
<Inner cylinder 129>
The inner cylinder 129 will be described with reference to FIGS. 12, 13, and 14. 12 is a front view of the inner cylinder 129, FIG. 13 is an exploded view of the inner cylinder 129, and FIG. 14 is a cross-sectional view taken along line BB in FIG.

  The inner cylinder 129 includes an upper cylinder 129a having an intake portion 129c on the upper side, and a lower cylinder 129b having a larger diameter than the upper cylinder 129a on the lower side. An air intake portion 129c is provided on the side surface of the upper cylinder 129a, and is formed by a lattice-shaped frame (support frame). In the present embodiment example, the frame body (support frame) in the vertical direction is used, but a lattice shape may be used. A mesh member 136 is stretched over the outer peripheral surface of the air intake portion 129c, and the mesh member 136 is held on a frame (support frame) by covering or insert molding. By providing the mesh member 136 in the intake portion 129c, the upper cylinder 129a has a filter function and suppresses inflow of fine dust into the inner cylinder 129. In the present embodiment, the mesh member 136 is made of polyester, but may be metal (for example, stainless steel), not a frame (support), but a small-diameter through-hole (approximately φ2 mm that can be molded with a mold). The air intake portion 129c having a plurality of holes) may be used. Unlike the case where the mesh member 136 is stretched over the frame (support frame), the through hole is effective for strength and breakage of the mesh member 136, and has an advantage that secondary molding is unnecessary. However, since the diameter of the through-hole is larger than the mesh opening of the mesh member 136, in order to prevent the inflow of fine dust into the inner cylinder 129, it is preferable to make the hole as small as possible while considering the molding machine. preferable.

  As described above, the filter case 131 is provided on the upper side of the upper cylinder 129a. The filter case 131 is substantially cylindrical and is provided concentrically with the upper cylinder 129a. The upper part of the filter case 131 is opened, and the lower part is provided with an opening 131a communicating with the internal space of the upper cylinder 129a at the substantially central part. In the present embodiment, the upper cylinder 129a and the filter case 131 are integrally formed, but a detachable structure may be used. Further, packing 137 is provided at the lower part of the filter case 131, and the outer cylinder 128 and the filter case 131 are kept airtight when the filter case 131 is stored in a filter case receiving portion 128a of the outer cylinder 128 described later. Contact with. In the present embodiment, the packing 137 provided in the filter case 131 has a structure (removable structure) in which a ring-shaped rubber member is mounted in a recess in the lower part of the filter case 131, but the dust collector 12 is washed. In some cases, the packing 137 may be removed, and the filter case 131 and the packing 137 may be integrally molded (secondary molding) in order to prevent the packing 137 from being forgotten.

  The lower cylinder 129b of the inner cylinder 129 is provided concentrically with the upper cylinder 129a, and is substantially cylindrical and has an upper surface closed. In other words, the shape is such that the bottom surface is open and has a space 138. Then, an umbrella part 139 in which the shape of the lower cylinder 129b is offset so as to be included is provided in the space 138 of the lower cylinder 129b, and the cylindrical body 140 that protrudes downward from the upper surface is provided in the space 139a inside the umbrella part 139. Is provided. The cylindrical body 140 is provided concentrically with the umbrella portion 139, has a substantially conical shape in which the bottom surface 140a is closed and substantially hemispherical, and tapers toward the bottom surface 140a. By making the cylindrical body 140 into a substantially conical shape that tapers, it becomes a container shape that expands together with the tapered substantially conical portion at the bottom of the outer cylinder 128, which will be described later. Become. In the cylindrical body 140, the diameter of the substantially conical portion may be reduced in order to increase the dust collection volume.

  As described above, the umbrella portion 139 is included in the lower cylinder 129b and a sliding mechanism that slides in the vertical direction is provided, so that dust can be easily discharged when the garbage is discarded. The umbrella part 139 is housed in the lower cylinder 129b except when dust is thrown away, such as when sucked, and slides downward when dust is thrown away, thereby pushing out dust in the dust collecting device 12.

  The sliding mechanism is as follows. A bottomed cylindrical spring case 141 is provided substantially in the center of the umbrella 139, and the spring case 141 includes a spring seat 141a and a spring shaft 141b. Therefore, the outer periphery of the spring case 141 is covered with the cylindrical body 140. The lower cylinder 129 b is provided with a piston portion 142 that is nested in the spring case 141. The spring shaft 141b is structured to be fastened with a screw 144 so that the stopper 143 can be fixed. The spring 145 is inserted into the spring case 141 from above, and the nested piston portion 142 integrated with the lower cylinder 129b is mounted. After that, the stopper 143 is fastened to the spring shaft 141b with a screw 144 or the like. With such a structure, a sliding mechanism of the umbrella portion 139 is configured. The stopper 143 slides to the stopper receiving portion 129d provided on the upper surface of the lower cylinder 129b. Therefore, as described above, the sliding distance is less than the height of the space 138 of the lower cylinder 129b, and the height of the stopper 143 is substantially equal to the sliding distance. In this embodiment, the spring case 141 is formed as a separate part, and the umbrella part 139 is removable. The umbrella part 139 and the spring case 141 are fixed by a lock mechanism (not shown) provided on both sides, and the umbrella part 139 is rotated to be attached and detached. Further, a notch portion 141c is provided on the side surface of the spring case 141, and a notch portion 141c is fitted with a protrusion (not shown) provided on the piston portion 142 to prevent rotation when the umbrella portion 139 is attached or detached. It has become. By providing such an umbrella part 139 attachment / detachment structure, even when dust enters the lower cylinder 129b, it is possible to remove the dust by removing the umbrella part 139. In addition, when the inner cylinder 129 is washed, it can be decomposed, so that moisture can be easily removed and care is facilitated. In this embodiment, the umbrella portion 139 and the spring case 141 are separate components, but the umbrella portion 139 and the spring case 141 may be integrally formed. In that case, it becomes possible to mold with a mold by making the cylindrical body 140 a separate part.

In such a sliding mechanism, the state in which the spring 145 is close to the natural length is the state in which the umbrella portion 139 protrudes most. As described above, the vertical sliding distance of the umbrella portion 139 is less than the height of the space 138 of the lower cylinder 129b. In other words, the upper surface 139c of the umbrella portion 139 does not exceed the bottom surface 129e of the lower cylinder 129b. This is to reduce the gap between the bottom surface 129e of the lower cylinder 129b and the upper surface 139c of the umbrella portion 139 when dust is discarded, thereby preventing dust from being caught between the bottom surface 129e and the upper surface 139c. . Further, the umbrella portion 139 is provided with a minimum necessary gap that can easily slide in the space 138 in the lower cylinder 129b. Moreover, since the umbrella part 139 is in the dust accommodating part 135, if the gap (gap) between the outer periphery of the umbrella part 139 and the lower cylinder 129b is too small, the dust may be caught in the gap and difficult to slide. In the present embodiment example, a gap considering dust biting is provided, and a plurality of ribs 139b are provided on the outer periphery of the umbrella portion 139, thereby reducing backlash at the time of sliding due to the increased gap. Further, the umbrella portion 139 is provided with a step portion 139d, and the step portion 139d and the bottom surface 129e of the lower cylinder 129b are combined (the umbrella portion 139 is contained in the space 138 of the lower cylinder 129b), and the lower cylinder 129b The gap with the umbrella part 139 is eliminated. This suppresses the entry of dust into the gap between the lower cylinder 129b and the inside of the umbrella portion 139 during dust suction. In addition, a flange 146 is provided at the bottom of the umbrella portion 139, and the return of dust from the dust container 135 to the dust separator 134 is suppressed by the flange 146. In addition, since dust accumulates below the flange portion 146, it is preferable that the dust discharge timing is before the dust exceeds the flange portion 146.
<Upper lid 132>
As described above, the inner cylinder 129 is accommodated in the outer cylinder 128, and the outer cylinder 129 and the inner cylinder 128 are fixed to form an integrated dust collector 12. The outer cylinder 128 and the inner cylinder 129 are fixed by the upper lid 132. As shown in FIGS. 10 and 11, the upper lid 132 is a substantially cylindrical body that is open at the top and bottom, and covers the filter case receiving portion 128 a provided on the upper portion of the outer cylinder 128 described later so as to cover the filter case receiving portion 128 a. One size larger than the diameter. A structure is provided in which the upper lid 132 and the filter case receiving portion 128a are fixed by rotating from the state in which the upper lid 132 is covered on the filter case receiving portion 128a. The filter case receiving portion 128a is provided with a notch on the inner surface of the upper lid 132 and a projection on the filter case receiving portion 128a (not shown) so that the upper lid 132 can be covered only at a predetermined position. When the upper lid 132 is pressed against the outer cylinder 128 side with the notch and the projection aligned, and the upper lid 132 is rotated, the projection enters the notch space and the upper lid 132 and the outer cylinder 128 can be fixed.

The upper lid 132 is provided with the D lock button 119 described above, and is fixed to the cleaner body 1.
<Dust collection filter 130>
As shown in FIGS. 10 and 11, the dust collection filter 130 is formed of a frame body and a filter member 147 that is folded into a pleat shape within the frame body. The filter surface of the dust collection filter 130 is preferably in a substantially horizontal direction. This is because the force in the direction of gravity acts on the fine dust adhering to the filter member 147 so that the dust is easily dropped. Further, since the filter area is increased by folding the filter member 147 into a pleat shape, pressure loss due to the filter member 147 can be reduced. The material of the filter unit 147 is, for example, a high-density HEPA filter (High Efficiency Particulate Air Filter). A HEPA filter is an air filter having a particle collection rate of 99.97% or more with respect to particles having a rated air volume of 0.3 μm and an initial pressure loss of 245 Pa or less. It is desirable that the dust collecting filter 130 can be washed with water by the user. In addition, a sponge filter (not shown) may be provided at the front portion of the dust collection filter 130. It is desirable that the sponge filter extends the frame body of the dust collection filter 130 to the front side and can be fitted into the frame body. It is desirable that the user can wash the sponge filter with water. As a result, the dust collection filter 130 is less likely to be directly soiled by dust, and the careability is improved.

  The dust collection filter 130 is accommodated in a filter case 131 provided on the upper portion of the inner cylinder 129. Accordingly, the dust collection filter 130 is located between the upper lid 132 and the filter case 131 described above. In order for all the air that has passed through the mesh member 136 of the inner cylinder 129 to pass through the dust collection filter 130, it is necessary to press the dust collection filter 130 between the upper lid 132 and the filter case 131. Therefore, the dust collection filter 130 is provided with a packing 148 on the outer periphery for keeping the upper lid 132 and the filter case 131 airtight. The packing 148 is formed of rubber members or the like on the upper and lower surfaces of the bowl-shaped flange 130 a provided on the outer periphery of the dust filter 130. When the dust collecting filter 130 is attached to the filter case 131, the lower surface side of the packing 148 and the flange portion 131 a at the top of the filter case 131 are in contact with each other. An airtight surface 132a is provided on the upper portion of the upper lid 132. When the upper lid 132 is covered from above the dust filter 130 as described above, the upper surface side of the packing 148 comes into contact with the airtight surface 132b, and the upper lid 132 is fixed by the operation. The dust collection filter 130 is pressed between the upper lid 132 and the filter case 131. At this time, as described above, the packing 137 provided at the lower portion of the filter case 131 and the outer cylinder 128 are also pressed so as to maintain airtightness.

Further, a packing 130b for maintaining airtightness is also provided on the upper surface of the dust collection filter 130. The packing 130 b is provided so as to protrude above the top surface of the upper lid 132. When the dust collector 12 is attached to the cleaner body 1, the airtightness between the cleaner body 1 and the dust collector 12 is maintained by the packing 130 b.
<Outer cylinder 128>
The outer cylinder 128 will be described with reference to FIGS. 15 to 18. 15 is a front view of the outer cylinder 128 with the bottom lid 133 open, FIG. 16 is a right side view of the outer cylinder 128 with the bottom lid 133 open, and FIG. 17 is a cross-sectional view taken along the line CC in FIG. 21 is a sectional view taken along the line DD in FIG.

  The outer cylinder 128 is a substantially cylindrical body that is open at the top and bottom, and is provided with a filter case receiving portion 128a that is slightly larger than the outer diameter of the filter case 131 so as to enclose the filter case 131 at the top. The filter case receiving portion 128a includes a flange portion 128b protruding outward and inward. The outer surface of the flange portion 128 b is in contact with the bottom surface of the above-described upper lid 132, and the outer diameter of the flange portion 128 b is substantially equal to the outer diameter of the upper lid 132. Further, although not described in detail, the filter receiving portion 128a is provided with one cutout portion, which is cut out so as to avoid a protrusion provided on the outer periphery of the filter case 132. Therefore, the inner cylinder 129 to be inserted into the outer cylinder 128 is positioned by aligning the positions of the notches and the protrusions of the filter case 132. The height of the filter receiving portion 128a is set higher than the sliding distance of the inner cylinder 129 described above. This is the height at which the filter case 131 can be accommodated in the filter case receiving portion 128a when the inner cylinder 129 is mounted with the bottom lid 133 to be described later closed (with the umbrella portion 139 protruding). If the case 131 exceeds this height, the inner cylinder 129 is not stabilized and it is difficult to mount it. The inner diameter of the flange portion 128b is smaller than the outer diameter of the packing 137 provided at the lower portion of the filter case 131. When the filter case 131 is fixed, the packing 137 is pressed against the upper portion of the flange portion 128b to maintain airtightness.

  A bottom lid 133 is provided at the opening on the opposite side of the filter case receiving portion 128a (the lower portion of the outer cylinder 128) so that it can be opened and closed. Details of the shape of the bottom lid 133 will be described later.

  An inlet 149 and a lid lock mechanism 150 are provided on the side surface of the outer cylinder 128. As shown in the DD cross-sectional view of FIG. 18, the inflow port 149 is provided on a surface (b) parallel to the center line (b), and the inflow port outer wall surface 149 a is larger than the outer diameter of the outer cylinder 128. It is on the outside and is formed so as to be connected to the outer cylinder 128 by a substantially tangent line. The opening of the inflow port 149 has a substantially square shape. Therefore, the inflow port outer wall surface 149a is not parallel to the center line (c). In other words, the inflow port 149 protrudes outside the outer diameter of the outer cylinder 128. This is to prevent the inner cylinder 129 and the inflow port 149 provided on the concentric axis with the outer cylinder 128 from overlapping each other when viewed from the surface of the inflow port 149. When the inner cylinder 129 can face from the surface of the inflow port 149, the air containing the dust that has flowed in collides with the inner cylinder 129, and the dust separation performance is deteriorated. Further, since the side surface of the inner cylinder 129 has a filter structure in which the mesh member 136 is stretched over, a problem such as dust sticking to the mesh member 136 may occur, and the suction force may be reduced. In addition, the arrangement of the inlet 149 as in the present embodiment is also effective in reducing pressure loss and noise. When the inlet 149 having the same opening area as that of the present embodiment is accommodated within the outer diameter of the outer cylinder 128, the inner cylinder 129 faces the inlet 149, and thus the above-described problem occurs. Therefore, it is necessary to reduce the width direction of the inflow port 149, the flow velocity increases, and pressure loss and noise increase. In order to prevent the pressure loss and noise from increasing, it is conceivable to change the aspect ratio of the inlet 149 to secure the opening area by making the inlet 149 long in the vertical direction. If the length is increased, the vertical direction of the outer cylinder 128 becomes longer, so that the dust collector 12 becomes larger. The present embodiment is a stick type / handy type vacuum cleaner, a compact vacuum cleaner main body 1 is desired, and the dust collector 12 needs to be compact. Therefore, the vacuum cleaner 100 in which the vacuum cleaner main body 1 is made compact can be provided by the dust collector 12 of the present embodiment.

  Further, as described above, the inflow port 149 is provided with an opening on a surface (b-plane) parallel to the center line (A) shown in the DD cross-sectional view of FIG. In addition, the surface (b-plane) having the opening of the inflow port 149 is located on the inner side (center line (A) side) than the outer diameter of the outer cylinder 128. Since an introduction pipe 160, which will be described later, is fluidly connected to the outer cylinder 128, the introduction (inner face) of the inflow port 149 is made smaller than the maximum outer diameter of the outer cylinder 128 (in the second face). The front-rear height of the cleaner body 1 including the pipe 160 can be reduced. In other words, the vacuum cleaner 100 in which the vacuum cleaner body 1 is made compact can be provided by offsetting the introduction pipe 160 without providing it on the same line of the central axis (c) of the outer cylinder 128.

  In this embodiment, the inlet 149 is provided on the right side. However, the inlet 149 may be provided on the left side, and the swirling direction of the inflowed air is opposite, but it is necessary to consider the influence on the dust separation performance. There is no.

  As shown in the CC cross section of FIG. 17, the outer cylinder 128 of the present embodiment example has a cylindrical shape at the top. Further, as surrounded by a broken line 190 in the figure, a dust return prevention surface 151 is provided substantially horizontally from the substantially central portion to the outer side in a substantially vertical direction with respect to the central axis of the dust collector 12, and the dust return prevention surface 151 is provided. From below, the shape expands in a substantially conical shape. The dust return prevention surface 151 is expanded from the inner peripheral surface of the upper cylindrical shape of the outer cylinder 128 to the outer diameter side by about 2.5 mm. In a state where the inner cylinder 129 is attached to the outer cylinder 128, the lower surface of the umbrella part 139 of the inner cylinder 129 is in the cylinder above the outer cylinder 128, and dust is deposited on the lower surface of the umbrella part 139 of the inner cylinder 129 (below the flange 146). Accumulates. Therefore, the dust return prevention surface 151 prevents the dust accumulated in the lower dust storage part 135 and the dust contained in the air returning from the dust storage part 135 from returning along the inner surface of the outer cylinder 128. Accordingly, since dust can be prevented from adhering to the mesh member 136 on the side surface of the inner cylinder 128 and fine dust can be prevented from being blown out from the mesh member 136, the dust collector 12 can be provided with reduced reduction in suction force. A vacuum cleaner 100 can be provided.

  In addition, by providing the dust return prevention surface 151 and forming a substantially conical shape below the dust return return surface 151, the volume of the outer cylinder 128 can be increased and more dust can be accumulated. In the present embodiment, the dust collector 12 is inclined about 8 degrees with the central axis of the dust collector 12 in the vertical direction.

  Further, in the portion surrounded by the broken line 190 in FIG. 17, an annular rib 152 may be provided in a substantially vertical direction below the dust return return surface 151 as shown in a cross-sectional view in FIG. The annular rib 152 extends in a substantially conical shape by extending the upper cylindrical portion, and it is possible to prevent dust from flying back along the inner wall of the outer cylinder 128.

  Further, as shown in the cross-sectional view of FIG. 20, the portion surrounded by the broken line 190 in FIG. 17 has a cylindrical shape on the upper side, and is inclined upward from a substantially central portion to a direction perpendicular to the central axis of the dust collector 12. The dust return return surface 151 may be provided, and the lower part of the dust return return surface 151 may be expanded in a substantially conical shape. By providing such an inclined dust return return surface 151, it is possible to suppress sticking of dust to the mesh member 136 on the side surface of the inner cylinder 129 and blow-off of fine dust from the mesh member 136. It is possible to provide the vacuum cleaner 100 having the dust collecting device 12 in which the decrease in force is suppressed.

  Moreover, the vacuum cleaner 100 of this embodiment has a structure for both stick type and handy type. In the handy state, the body of the cleaner body 1 has various postures, and the upper part of the dust collecting device 12 (dust collecting filter). 130 side) may face downward. At that time, providing the dust return prevention surface 151 as described above is effective in suppressing the return of dust from the dust container 135 to the dust separator 134.

In the present embodiment example, the dust collecting device 12 of the electric vacuum cleaner 100 for both stick type and handy type has been described. However, even in the floor moving type cyclone cleaner, the dust return return surface 151 as described above is provided. In addition, since the return of dust from the dust container 135 to the dust separator 134 can be suppressed, it is effective in blowing out fine dust and compressing dust.
<Lid lock mechanism 150>
The lid lock mechanism 150 provided on the side surface of the outer cylinder 128 includes a lid lock cover 153, a button 154, and a spring (not shown). Although details are omitted, the button 154 is biased by a spring, and when the button 154 is pressed, the claw portion 155 integrated with the button 154 rotates, and the button 154 is moved from the hook portion 156 provided on the bottom lid 133. The claw part 155 of 154 is removed, and the bottom cover 133 is opened. The claw portion 155 and the hook portion 156 form a slope with each other (not shown), the slopes come into contact with each other by closing the bottom lid 133, and the bottom lid 133 is further pushed up so that the button 154 has a rotational force. Thus, the spring is contracted, the claw portion 155 gets over the hook portion 156, and the bottom lid 133 is closed again.
<Bottom lid 133>
The bottom lid 133 is a dish having a depth, and is provided with a packing 157 on the outer periphery of the upper surface. When the bottom lid 133 is closed, airtightness with the bottom of the outer cylinder 128 can be maintained. The bottom lid 133 is increased in strength by being dished. In addition, a hook portion 156 for locking the outer cylinder 128 and the bottom lid 133 described above is provided on a part of the outer periphery, and a hinge portion 158 provided with a rotation shaft 158a is provided on the opposite surface.

  On the bottom surface (back side surface) of the bottom cover 133, a recess 159 is provided on the pipe case 4 side of the cleaner body 1, and the dust collector fixing projection 117 of the cleaner body 1 and the recess on the bottom surface of the bottom cover 133 are provided. 159 is fitted. As described above, when attaching the dust collector 12 to the cleaner body 1, the recess 159 on the bottom surface of the bottom cover 133 is fitted to the dust collector fixing protrusion 117 of the cleaner body 1, and the protrusion is the starting point. The dust collector 12 is pressed against the cleaner body 1 side. And the dust collector 12 is united with the cleaner main body 1 by the D lock button 119 of the upper part of the upper cover 132 mentioned above. Therefore, when the dust collector 12 is attached to the cleaner body 1, the lid lock mechanism 150 is hidden on the cleaner body 1 side. This is because when the lid lock mechanism 150 is provided on the opposite side (outside), the lid lock mechanism 150 may be released during cleaning, and malfunction is prevented. For example, when cleaning the bottom of a sofa or bed in a stick-type state, the vacuum cleaner body 1 may be brought closer to the horizontal with respect to the floor surface. At this time, when the lid lock mechanism 150 is provided on the rear side, There is a possibility that the lid lock mechanism 150 is released in contact with the floor surface. The positions of the lid lock mechanism 150 and the hinge portion 158 are not limited to this, and may be provided on the left and right of the cleaner body 1. Providing them on the left and right can prevent the above-described malfunction and eliminates the protrusion of the hinge portion 158, so that the height of the cleaner body 1 in the front-rear direction can be reduced, and compactness can be achieved.

  Further, the dish-shaped bottom lid 133 protrudes at the center, and is provided with a recessed portion 170 that is recessed from the protruding portion at the center. The hollow portion 170 is larger than the spherical sphere radius of the bottom surface 140a of the cylindrical body 140 described above, and the depth of the hollow portion 170 is such that the bottom lid 133 is open (with respect to the bottom surface of the outer cylinder 128). In a vertical state), a horizontal plane is not formed in the indented portion 170. Further, the depression 170 is made as shallow as possible so that dust does not remain in the depression 170 when the waste is discharged.

  In this embodiment, the recess 170 is formed as a separate body, and a material such as POM (polyoxymethylene) is used so as to reduce wear of the member due to friction with the cylinder 140 when the bottom lid 133 is opened and closed. However, it may be formed integrally.

In the structure of the outer cylinder 128 and the inner cylinder 129 as described above, by attaching the inner cylinder 129 to the outer cylinder 128, the sliding mechanism provided in the inner cylinder 129 is the same as that of the bottom lid 133 provided in the lower portion of the outer cylinder 128. This is done by opening and closing. When the bottom lid 133 is opened, the umbrella portion 139 protrudes downward. When the bottom lid 133 is closed, the spring 145 contracts, and the umbrella portion 139 is accommodated in the lower cylinder 129b. Therefore, when the lid locking mechanism 150 of the bottom lid 133 is released when the garbage is thrown away, the umbrella part 139 jumps downward and pushes out dust.
<Operation when throwing away garbage>
In the outer cylinder 128, the inner cylinder 129, and the dust discharge sliding mechanism as described above, the operation when throwing away the dust will be described with reference to FIG. 21 and FIG. 21 is a cross-sectional view taken along line EE shown in FIG. 11 with the bottom lid 133 closed, and FIG. 22 shows the state after the waste is discharged in FIG. 21 (the state in which the bottom lid 133 is opened).

  The bottom lid 133 is released by pressing a button 154 of a lid lock mechanism 150 provided on the side surface of the dust collector 12. The bottom lid 133 includes a hinge portion 158 on the opposite side of the lid lock mechanism 150, and rotates about the rotation shaft 158a of the hinge portion 158 so that the bottom lid 133 is substantially vertical (the upper surface of the bottom lid 133 is vertical).

  Simultaneously with the opening of the bottom lid 133, the spring 145 causes the umbrella portion 139 and the cylindrical body 140 to protrude downward. Accordingly, the umbrella portion 139 is positioned closer to the opening of the lower surface of the outer cylinder 128 when the bottom lid 133 is opened than when the bottom lid 133 is closed. By the sliding of the umbrella part 139, the collected dust is pushed downward.

  When the bottom cover 133 is closed after throwing away the garbage, the bottom surface 140a of the cylindrical body 140 that protrudes downward contacts the recessed portion 170 provided at the center of the bottom cover 133, and the umbrella section 139 and the cylindrical body 140 are pushed upward. Since the bottom surface 140a of the cylindrical body 140 and the recess portion 170 are in contact with each other in a spherical shape, the contact area between the bottom surface 140a of the cylindrical body 140 and the recess portion 170 is kept constant even if the angle of the bottom lid 133 is changed by closing the bottom lid 133. Further, since the force is always applied in the vertical direction by bringing the curved surfaces into contact with each other, the umbrella portion 139 fits in the lower cylinder 129b smoothly. In the case where the bottom cover 133 is brought into contact with a flat surface without providing the recessed portion 170, the direction in which the force is applied is perpendicular to the flat surface, so that the umbrella portion 139 is difficult to return vertically and the bottom cover 133 is difficult to close. When the bottom lid 133 is closed to a substantially horizontal state, the hook portion 156 comes into contact with the claw portion 155 and is locked in a state in which airtightness is maintained by the packing 157 provided on the bottom lid 133.

  In addition, providing a mechanism for discharging dust from below the dust collector 12 in this way is a vacuum cleaner 100 (rechargeable vacuum cleaner) having a main body terminal portion 9 above the dust collector 12 as in the present embodiment. Effective in the dust collector 12 and the dust can be prevented from adhering to the upper side of the dust collector 12 (on the upper lid 132 side).

Next, the shape and structure of the introduction pipe 160 that guides the air containing dust to the dust collector 12, which is the upstream side of the dust collector 12, and the air flow will be described.
<Introducing pipe 160>
The electric vacuum cleaner 100 for both stick type and handy type in this embodiment is a flow path from the suction port 15 at the tip of the vacuum cleaner body 1 to the inlet 149 of the dust collector 12 (outer cylinder 128). An introduction pipe 160 is provided. FIG. 23 shows only the introduction pipe 160 and the dust collector 12 from the state where the dust collector 12 is mounted on the cleaner body 1 shown in FIG. 24 is a front view of FIG. 23, and FIG. 25 is a cross-sectional view taken along line FF shown in FIG.

  The introduction pipe 160 is open at the top and bottom, and includes an introduction pipe outlet 161 that is fluidly connected to the inlet 15 described above and the inlet 149 of the dust collector 12 (outer cylinder 128) above. The suction body 3 and the like are connected to the lower suction port 15.

  The introduction pipe 160 is provided on the side surface of the dust collector 12. The central axis (d) of the dust collector 12 shown in FIG. 24 is on the same line (substantially parallel) as viewed from above with the central axis (not shown) of the cleaner body 1. Further, as described above, the dust collector 12 is attached to the rear of the cleaner body 1. The central axis (e) of the straight portion (straight line 160 a) of the introduction pipe 160 is substantially parallel to the central axis (d) of the dust collector 12. The straight pipe 160a of the introduction pipe 160 has a length from the inlet 149 of the outer cylinder 128 to the bottom of the outer cylinder 128, and is bent in a direction toward the center of the bottom lid 133 so as to avoid the bottom lid 133. Further, a straight pipe 160b extending downward is provided. The central axis (f) of the straight pipe 160b is located on the same line as the central axis (d) of the dust collector 12 when viewed from above. In other words, the introduction pipe 160 has a pipe shape in which the central axis of the straight pipe 160a and the central axis (f-axis) of the straight pipe 160b having the suction port 102 are substantially parallel, and both straight pipes are connected obliquely downward. Although the inclination angle of the inclined pipe 160c that connects both straight pipes obliquely downward differs depending on the position of the suction port 15, the position (range) of the suction port 15 is located in the bottom surface of the dust collector 12 (inside the outer diameter of the bottom cover 133). It has a shape like this. Further, the introduction pipe 160 is housed in the introduction pipe case portion 14 of the cleaner body 1, and the introduction pipe case portion 14 has a shape swelled to the left side of the pipe case portion 4 as viewed from the front (shown in FIG. 1). Right).

  The introduction pipe outlet 161 connected to the inlet 149 of the dust collector 12 is provided with a packing 162. When the dust collector 12 is attached to the cleaner body 1, the packing 162 and the inlet 149 are pressed against each other to maintain airtightness. To do. The packing 162 uses a rubber member, a non-breathable sponge-like member, an elastomer material, or the like, and is formed integrally with the introduction pipe outlet 161 (secondary molding), or the introduction pipe outlet 161 and the introduction pipe case. The airtightness of the introduction pipe outlet 161 and the packing 162 is maintained by fixing the part 14 so as to be sandwiched between the part 14 and the like. Further, the packing 162 may be provided not at the inlet pipe outlet 161 but at the inlet 149 of the dust collector 12. However, when the dust collector 12 can be washed with water, the packing 162 is used when the packing 162 is a separate part. Therefore, it is preferable to provide the inlet pipe outlet 161 as described above.

  24, 25 and 26 show the flow of air containing dust caused by bending the introduction tube 160 as in this embodiment. 170 shown in the figure is dust and the flow of air is indicated by an arrow A. The air sucked from the suction port 15 flows as indicated by an arrow A along the shape of the introduction pipe 160. At this time, the dust 170 having a density larger than that of air and having a weight is pushed to the right side of the inner wall surface of the straight pipe 160a by the inertial force 180 by the slanting pipe 160c, and is conveyed to the dust collector 12 along the right side of the inner wall surface. . Since the right side of the inner wall surface of the straight pipe 160 a is connected to the right side of the inner wall surface of the inlet 149 provided in the outer cylinder 128, it is connected to the inner wall surface of the outer cylinder 128 in a substantially tangential direction. Accordingly, the dust 170 conveyed along the right side of the inner wall surface of the straight pipe 160a is centrifuged to turn around the inner wall surface of the outer cylinder 128 farthest from the outer periphery of the inner cylinder 129 on the outer diameter side of the dust separator 134. Performance is improved. Further, from the view seen from the suction port 15 side (lower side) shown in FIG. 25 or FIG. 26, the straight pipe 160a is located in front of the straight pipe 160b having the suction port 15, and therefore, similar to the flow described above. Since the dust 170 is conveyed to the front side of the inner wall surface of the straight pipe 160a by the inertial force 180, the dust 170 is conveyed from above the inflow port 149 provided in the outer cylinder 128. Thereby, since the height direction of the inflow port 149 can be used effectively, the height of the dust separation part 134 can be used effectively. As the dust separator 134 is higher (longer in the vertical direction), the centrifugal separation performance of dust is improved. Therefore, the vacuum cleaner 100 having the dust collecting device 12 that secures the centrifugal separation performance while suppressing the height of the dust separation portion 134 (downsizing) by using the bent introduction pipe 160 as in the present embodiment. Can be provided.

  In addition, providing the bent portion in the introduction pipe 160 also leads to the compactness of the cleaner body 1. For example, when cleaning the bottom of a sofa or bed in the stick type, the cleaner body 1 is brought close to the floor surface and the mouthpiece 3 is inserted into a narrow gap between the top and bottom. At this time, for example, in the shape in which the introduction pipe 160 extends straight as in JP-A-2002-85297, the dust collecting device 12 hits the floor. Can't get close to the surface. Therefore, the front-rear length of the cleaner body 1 can be shortened by bending the introduction tube 160 as in the present embodiment, and the compact vacuum cleaner 100 can be provided. As a method of shortening the front-rear length of the vacuum cleaner main body 1, it is possible to bring the introduction pipe 160 closer to the floor without reducing the diameter of the dust collector 12, but the diameter of the dust collector 12 is reduced. If it is made smaller, the dust separation performance, the amount of dust collection, and the pressure loss may be deteriorated. By bending the introduction pipe 160 as in the present embodiment, the dust separation performance can be improved, the dust collection device 12 can be made with a large amount of dust collection and low pressure loss, and a compact vacuum cleaner. 100 can be provided.

  Further, even in a shape in which the introduction pipe 160 extends straight, unlike the vacuum cleaner 100 of the present embodiment example, the dust collecting device 12 is provided in front of the cleaner body 1 (rear front of the pipe case portion 4). The above-described cleaner body 1 can be brought close to the floor surface, and an operation can be performed in which three suction mouths are inserted into a narrow gap (see Japanese Patent Application Laid-Open No. 2004-24887). However, when the dust collector 12 is provided in front of the cleaner body 1, the inlet 149 of the dust collector 12 faces rearward, so that the cleaner body 1 is brought close to the floor surface or in a handy state. When the operation of the vacuum cleaner main body 1 is such that the upper portion of the dust collector 12 (on the side of the dust collecting filter 130) faces downward and the operation is stopped, dust may remain in the introduction pipe 160. In order to solve this problem, it is conceivable to provide a check valve at the inlet 149. However, there is a risk that the check valve may increase pressure loss or dust may be caught in the check valve. Accordingly, by providing the dust collecting device 12 behind the cleaner body 1 and bending the introduction pipe 160 as in the present embodiment, it is difficult for dust to remain on the inlet 149 side even in various cleaning postures. Therefore, an increase in pressure loss due to the provision of a check valve and the like, and dust trapped in the check valve can be suppressed, and a compact vacuum cleaner 100 can be provided.

  Further, as described above, when the cleaner body 1 is viewed from the front, the introduction pipe case portion 14 has a shape that swells to the left side of the pipe case portion 4 (the right side of the pipe case portion in FIG. 1 and the like). FIG. 27 is a GG cross-sectional view of the cleaner body 1 shown in FIG. As shown in the drawing, the central axes of the dust collector 12 and the cleaner body 1 are substantially parallel (on the same line), but the axis of the straight pipe 160a of the introduction pipe 160 is not on the same line of both axes. Thus, the cleaner main body 1 can be made difficult to hit the user's body by shifting the introduction pipe 160 in the left-right direction from the cleaner main body 1 (dust collecting device 12) to be asymmetrical (asymmetry). The figure which looked at the vacuum cleaner 100 from the front in FIG. 29, FIG. 30 is shown. FIG. 29 shows the vacuum cleaner 100 in a state where the telescopic pipe 5 is extended and the handle 2 is not rotated. FIG. 30 shows the electric vacuum cleaner 100 in a state where the telescopic pipe 5 is contracted and the handle 2 is rotated. Moreover, the vacuum cleaner main body 1 can be reduced in weight by reducing the weight of the case main body 50 by forming the introduction pipe case portion 14 in the case main body 50 along the shape of the introduction pipe 160. Thereby, the external appearance of the vacuum cleaner main body 1 can also be made small compared with what was left-right symmetric. In other words, when the vacuum cleaner main body 1 is viewed from the front, the case main body 50 swells to the left by the amount of the introduction pipe case portion 14, and the case main body 50 has an asymmetric shape. That is, the electric vacuum cleaner 100 as a whole has an asymmetric shape.

Further, when the introduction pipe 160 is arranged on the left side when viewed from the front as in this embodiment, the right-handed user is easy to use because there are few protrusions on the left side of the cleaner body 1, and the introduction pipe 160 is provided on the right side. When left is placed, it becomes easier for left-handed users to use. Switching between the right side and the left side only requires replacement of the outer cylinder 128, the introduction pipe 160, and the introduction pipe case portion 14. Therefore, it is possible to provide the vacuum cleaner 100 that realizes a universal design with few parts replacement.
<Air flow during waste suction>
FIG. 28 shows the air flow in a state where the dust collector 12 in which the outer cylinder 128, the inner cylinder 129, the dust collecting filter 130, the upper lid 132, and the bottom lid 133 are combined as described above is attached to the cleaner body 1. It explains using. FIG. 28 shows the air flow in the handy type state, but the same applies to the stick type state, and therefore the air flow in the stick type is omitted.

  When the user starts operation by the operation button 11b provided on the handle 2, the electric blower 17 is driven and sucks air. The sucked air flows from the inlet 15 of the inlet pipe 160 through the inlet pipe outlet 161 into the dust collector 12 through the inlet 149 (flow 200). At this time, dust is conveyed into the dust collector 12 from the substantially tangential direction of the outer cylinder 128 while being pushed to the left side of the inner wall surface of the introduction pipe 160 by the bent portion of the introduction pipe 160. The air containing the dust flowing in becomes a swirl flow, centrifugal force acts on the dust, and the dust and air are separated (flow 201). That is, dust and air are separated by the dust separation unit 134. Most of the separated air flows into the inner cylinder 129 from the air inlet 129c provided in the upper cylinder 129a (flow 202). Then, the air passes through the dust collection filter 130, passes through the upper opening of the upper lid 132, and reaches the electric blower 17 (flow 203). At this time, fine dust that has passed through the mesh member 136 of the intake port 129c is collected by the dust filter 130.

  On the other hand, the dust separated by the centrifugal force passes between the outer cylinder 128 and the lower cylinder 129b by gravity and a part of the air flow, and is conveyed into the dust container 135. At this time, since centrifugal force is acting on the dust, the dust turns in the dust container 135 (flow 204). If the vacuum cleaner is continuously used, dust is gradually accumulated and the dust container 135 becomes full, and the timing for throwing away the garbage is reached. The air that has flowed into the dust container 135 flows from the vicinity of the outer periphery of the lower cylinder 129b toward the upper cylinder 129a along the shape of the space 139a of the cylinder 140 and the umbrella 139 (flow 205). In order to suppress the return of dust to the upper cylinder 129a due to the air flow, the depth of the umbrella portion 139 is necessary. In this embodiment, a sliding mechanism that pushes out dust is provided in the lower cylinder 129b, so that the umbrella portion 139 has a sufficient depth. Further, the return of dust to the upper cylinder 129a is further suppressed by the dust return prevention surface 151 provided at the upper end of the tapered portion of the outer cylinder 128.

  When the dust container 135 is full of dust, the waste is discarded. The dust discharge mechanism is the same as described above. Even when the amount of dust sucked is small, the sliding mechanism of the umbrella 139 and the outer cylinder 128 are omitted. Due to the conical shape, dust can be discharged.

  As described above, according to the vacuum cleaner equipped with the cyclone type dust collector that can be used as a stick type or a handy type as shown in the present embodiment and can maintain the suction force, it is compact and lightweight and has a suction force. It is possible to provide an easy-to-use vacuum cleaner that balances strength.

DESCRIPTION OF SYMBOLS 1 Vacuum cleaner main body 2 Handle 3 Mouthpiece 4 Pipe case 5 Telescopic pipe 6 Charging stand 7 Motor case 8 Storage battery case 9 Main body terminal part 10 Telescopic button 11a, 11b Operation button 12 Dust collector 13 Suction body attaching / detaching button 14 Inlet pipe case part 15 suction port 17 electric blower 18 storage battery 20 tip brush 24 handle support shaft 25 charging base unit 26 charging base stand unit 28 charging base terminal unit 30 applied suction body 32 applied suction body fixing protrusion 50 case body 101 handle fixing clamp 106 exhaust port 108 Handle clamp spring 109 Fixed case 110 Main substrate 111 Main unit LED
112 Airtight surface 113 Suction part 115 Protective cover 116 Vibration-proof airtight rubber 117 Dust collector fixing projection 118 Dust collector fixing hole 119 D lock button 120 D lock button spring 128 Outer cylinder 128a Filter case receiving part 128b, 131b Flange part 129 Tube 129a Upper cylinder 129b Lower cylinder 129c Air intake portion 129d Stopper receiving portion 129e Bottom surface 130 Dust filter 130a Gutter portion 130b, 137, 148, 157, 162 Packing 131 Filter case 131a Opening portion 132 Upper lid 132a Airtight surface 133 Bottom lid 134 Dust separation Part 135 Dust container 136 Mesh member 138 Space 139 Umbrella 139a Space 139b Rib 139c Upper surface 140 Cylindrical body 140a Bottom surface 141 Spring case 141a Spring seat 141b Spring shaft 141c Notch 14 Piston part 143 Stopper 144 Screw 145 Spring 146 Eave part 147 Filter member 149 Inlet port 149a Inlet port outer wall surface 150 Cover lock mechanism 151 Dust return prevention surface 152 Ring rib 153 Cover lock cover 154 Button 155 Claw part 156 Engagement part 158 Hinge part 158a Rotating shaft 159 Indented portion 170 Indented portion 160 Introducing pipe 160a, 160b Straight pipe 160c Inclined pipe 161 Introducing pipe outlet 170 Dust 180 Inertial force 200, 201, 202, 203, 204, 205 Flow

Claims (4)

A vacuum cleaner main body having a main body intake port for sucking air containing dust and an electric blower that generates a suction force; and a dust collector detachable between the intake port and the electric blower. The apparatus is a vacuum cleaner having a substantially cylindrical outer cylinder forming an outer shell and an inner cylinder provided concentrically in the outer cylinder.
The inner wall of the outer cylinder is provided with a dust return prevention surface formed in a direction substantially perpendicular to the central axis of the outer cylinder ,
The electric vacuum cleaner characterized in that a portion with the largest diameter in the inner cylinder is located above the dust return prevention surface . A vacuum cleaner main body having a main body intake port for sucking air containing dust and an electric blower that generates a suction force; and a dust collector detachable between the intake port and the electric blower. The apparatus is a vacuum cleaner having a substantially cylindrical outer cylinder forming an outer shell and an inner cylinder provided concentrically in the outer cylinder.
The inner wall of the outer cylinder is provided with a dust return prevention surface formed outside the central axis of the outer cylinder,
The portion with the largest diameter in the inner cylinder is characterized in that the outer cylinder located above the dust return prevention surface has a shape in which the lower part is enlarged in a substantially conical shape from the dust return return prevention surface. Electric vacuum cleaner. The vacuum cleaner according to claim 2,
The vacuum cleaner characterized in that the dust return prevention surface is formed in a direction substantially perpendicular to a central axis of the outer cylinder. The electric vacuum cleaner according to any one of claims 1 to 3,
An electric vacuum cleaner comprising a substantially annular rib protruding downward on the dust return return surface.