JP2007089925A - Vacuum cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To raise sealing property in the sealing part of an exhaust filter in a vacuum cleaner in which an electric blower part is placed in a dust collection part. <P>SOLUTION: The vacuum cleaner includes: an electric blower part 3 incorporating an electric blower 2; and a dust collection part 4 with the electric blower part 3 placed therein, which collects dust in suction air to be sucked by the electric blower 2. The exhaust filter 11 to be held between the electric blower part 3 and the dust collection part 4 via a packing 11c for sealing is arranged in an exhaust flow path 3a to an exhaust port 3b which discharges the exhaust from the electric blower 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electric vacuum cleaner, and in particular, includes an electric blower portion incorporating an electric blower and a dust collecting portion that collects dust in the intake air on which the electric blower portion is placed and sucked by the electric blower. In particular, the present invention relates to a vacuum cleaner used for a store or business use.

  As this type of vacuum cleaner, for example, there is one disclosed in Patent Document 1, and in this vacuum cleaner, the exhaust from the electric blower is exposed to the outside from the exhaust port formed in the outer peripheral portion through the silencer. It is configured to be discharged.

Also, in conventional vacuum cleaners, when the speed is too high due to dust clogging on the suction side of the electric blower (when the vacuum on the suction side of the electric blower becomes high and the rotation speed is excessively increased) ) Is provided by providing an air pressure fluctuation valve (the pressure setting valve 24 in Patent Document 1) on the suction side of the electric blower.
JP-A-8-24174

  By the way, in recent general vacuum cleaners, in order to prevent fine dust contained in the exhaust from the electric blower from being blown out into the room, a more detailed structure is provided in the exhaust passage from the electric blower to the exhaust port. A fine filter (for example, a HEPA filter) is provided to make the exhaust discharged from the vacuum cleaner cleaner. Therefore, it is conceivable to provide the exhaust filter as described above also in the vacuum cleaner as described above. However, when an annular exhaust filter is disposed inside the exhaust port formed in the outer peripheral portion, the exhaust port and the annular exhaust are arranged. Since the sealing performance improvement effect due to the exhaust air pressure from the electric blower does not act on the seal portion of the filter, there arises a problem of exhaust leakage from the exhaust port and the seal portion of the filter.

  In addition, in a configuration in which an air pressure fluctuation valve is provided as a motor protection measure at the time of overspeed due to dust clogging, etc., a space for providing the air pressure fluctuation valve and a flow path of air flowing into the air pressure fluctuation valve must be provided on the suction side of the electric blower. In addition, there were problems in terms of design and configuration and cost.

  Accordingly, the present invention has been made to solve such a problem, and in a vacuum cleaner having a configuration in which the electric blower portion is placed on the dust collecting portion, the sealing performance of the seal portion of the exhaust filter is improved. It is for the purpose.

  Another object of the present invention is to provide a simple configuration for protecting a motor at an excessive speed due to dust clogging or the like.

  In order to achieve the above object, the present invention provides an electric blower unit incorporating an electric blower, and a dust collecting unit that collects dust in the intake air on which the electric blower unit is placed and sucked by the electric blower. And an exhaust filter that is sandwiched between the electric blower portion and the dust collecting portion via a seal member in an exhaust passage to an exhaust port that discharges exhaust from the electric blower. To do.

  Further, the dust collecting unit is composed of a cyclone unit containing a cyclone unit that separates dust in the intake air sucked by the electric blower by a cyclone method, and a dust box unit in which dust separated by the cyclone unit is accumulated, In the overspeed state of the electric blower, the sealing performance of the sealing member of the cyclone portion is impaired.

  Further, the dust collecting unit is composed of a cyclone unit containing a cyclone unit that separates dust in the intake air sucked by the electric blower by a cyclone method, and a dust box unit in which dust separated by the cyclone unit is accumulated, The outer cylinder of the cyclone unit is extended to the dust box part side from the inner cylinder.

  The cyclone unit separates a large-diameter coarse dust cyclone unit that separates coarse dust in the intake air sucked by the electric blower, and fine dust in the intake air from which the coarse dust is separated by the coarse dust cyclone unit. A small-diameter fine dust cyclone unit that extends the outer cylinder of the coarse dust cyclone unit to the dust box part side of the inner cylinder and is formed more than the outer cylinder of the fine dust cyclone unit. Is.

  And a second clamp mechanism for detachably joining the dust box part and the cyclone part, and a second clamp mechanism for detachably joining the cyclone part and the electric blower part. The engagement portion with which the clamp hook is engaged is formed in the second clamp mechanism.

  Further, the engagement portion with which the clamp hook of the first clamp mechanism is engaged is formed in the clamp hook of the second clamp mechanism.

  In the present invention, the exhaust air flow path to the exhaust port that discharges the exhaust from the electric blower is provided with an exhaust filter that is sandwiched between the electric blower portion and the dust collecting portion via a seal member, so that the electric blower portion The exhaust port and the exhaust filter can be improved in sealability with a simple configuration in which the load of the air and the suction of the electric blower are applied to the exhaust filter via the seal member. Dust can be prevented from leaking through the gap.

  In addition, when the electric blower is in an overspeed state, the sealing performance of the sealing member of the cyclone portion is impaired, so that the motor protection during the overspeed can be realized with a simple configuration. This eliminates the need for an air pressure fluctuation valve or the like, thereby eliminating design and configuration restrictions, which is advantageous in terms of cost.

  Further, by extending the outer cylinder of the cyclone unit to the dust box part side of the inner cylinder, it is possible to prevent dust accumulated in the dust box part from adhering to the filter of the inner cylinder.

  In addition, the outer cylinder of the coarse dust cyclone unit is extended to the dust box part side of the inner cylinder and is formed more than the outer cylinder of the fine dust cyclone unit. When placed on the floor or the like, the outer cylinder of the large-diameter coarse dust cyclone unit can be grounded to protect the outer cylinder of the small-diameter fine dust cyclone unit.

  Furthermore, the engaging part that the clamp hook of the first clamp mechanism that detachably joins the dust box part and the cyclone part is formed in the second clamp mechanism that detachably joins the cyclone part and the electric blower part. Thus, an increase in the number of parts can be suppressed with a simple configuration. In addition, since this type of clamping mechanism is made of metal (conductor), the electric blower unit, cyclone unit, and dust box unit are conductively connected. It is possible to release the static electricity accumulated in the electric blower motor of the electric blower unit through each clamp mechanism.

  In addition, the engagement portion engaged with the clamp hook of the first clamp mechanism that is frequently used to discard dust accumulated in the dust box portion is used as the clamp hook of the second clamp mechanism that is less frequently used for cleaning and cleaning the filter. If the first clamp mechanism that joins the dust box part and the cyclone part is not released, the second clamp mechanism that joins the cyclone part and the electric blower part cannot be released. It is possible to prevent an operation error that the second clamp mechanism is released.

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

  FIG. 1 is a longitudinal sectional view of a vacuum cleaner according to an embodiment of the present invention as viewed from the side, and a vacuum cleaner main body 1 of the present embodiment includes an electric blower unit 3 including an electric blower 2 and The electric blower unit 3 is placed and the dust collecting unit 4 collects dust in the air sucked by the electric blower 2. Further, the dust collecting unit 4 includes a cyclone unit 5 including a cyclone unit (to be described later) that separates dust in the air sucked by the electric blower 2 by a cyclone method, and the cyclone unit 5 is placed on the cyclone unit 5. It consists of a dust box portion 6 in which the separated dust accumulates.

  A power cord 7 for supplying power to the built-in electric blower 2 or the like is connected to the upper part on the back side of the electric blower unit 3. Further, on the front side of the cyclone portion 5, a hose insertion port 9 into which the joint portion 8 a of the vacuum cleaner hose 8 is inserted is formed. In addition, caster-type wheels 10 are provided at four locations, front, rear, left, and right, below the dust box portion 6.

  As shown in FIG. 2, the electric blower unit 3 is formed in a funnel shape with an outer shell opened on the lower surface side, and an electric blower 2 is built in with the suction port 2a facing downward, and an electric blower on the outer periphery. An exhaust port 3b for exhausting the exhaust from 2 to the outside through an annular exhaust channel 3a is formed.

  In the annular exhaust passage 3a, an annular exhaust filter 11 as shown in a longitudinal sectional view in FIG. 3 is placed in an annular groove 5a formed on the outer periphery of the upper surface of the cyclone portion 5 as shown in FIGS. It is comprised so that it may be mounted | worn by mounting and mounting the electric blower part 3 from the top as shown in FIG.

  The annular exhaust filter 11 includes a filter medium 11a such as an HEPA filter formed in an annular shape, and annular filter frame bodies 11b disposed on upper and lower ends of the annular filter medium 11a. Sealing packings 11c are attached to the upper and lower surfaces of the bodies 11b and 11b, respectively. Then, by being mounted on the annular exhaust passage 3a as described above, it is sandwiched between the electric blower portion 3 and the cyclone portion 5 of the dust collecting portion 4 via the seal packing 11c as shown in FIG. It is constituted so that.

  By the way, in general, when the annular exhaust filter 11 as described above is used, a metal punching plate is formed on the inner side and the outer side of the filter medium 11a so that the filter medium 11a is not deformed by a load when incorporated in the cleaner body 1. Is sandwiched between the two upper and lower filter frame bodies 11b, but there are problems in terms of the weight and cost of the metal punching plate.

  Therefore, in order to prevent a load from being applied to the filter medium 11a with a simple configuration without using a heavy and costly metal punching plate, the annular filter frame 11b is configured as shown in FIG. The two upper and lower annular filter frames 11b are common, and bosses 11d whose tips are in contact with each other when the filter medium 11a is sandwiched from above and below are equally spaced on the outer peripheral side and the outer peripheral side. And four are formed so as to be staggered on the inner peripheral side. The outer boss 11d is formed with ribs 11e and 11f that protrude from the inner and outer sides of the boss tip, and the common upper and lower filter frame bodies 11b are shifted by 90 °, as shown in FIG. As shown, when the filter medium 11a is assembled from above and below, the ribs 11e and 11f of the upper and lower bosses 11d are assembled inside and outside. The load applied to the exhaust filter 11 is received by the bosses 11d and 11d that come into contact with each other in this manner, and no load is applied to the filter medium 11a.

  On the other hand, the cyclone unit 5 includes a large-diameter coarse dust cyclone unit 13 that separates coarse dust in the intake air sucked by the electric blower 2 through the suction cylinder 12 communicating with the hose insertion port 9 described above, and the coarse cyclone unit 13. A plurality of fine dust cyclone units 14 provided on the outer peripheral side of the dust cyclone unit 13 to separate fine dust in the intake air from which coarse dust has been separated by the coarse dust cyclone unit 13, and each fine dust cyclone unit 14 and an electric blower It is comprised from the flow-path part 15 which makes the part 3 communicate.

  The coarse dust cyclone unit 13, the fine dust cyclone unit 14, and the flow path portion 15 are integrally assembled, and in a normal use state, as shown in FIGS. 8A and 8B, the cyclone portion 5 and the dust box portion. The sealing performance of the flow path portion 15 is such that the sealing packing 19 mounted on the annular rib 18 on the upper surface side of the cyclone units 13 and 14 is pressed upward by the packing pressure of the sealing packings 16 and 17 between the six. Has been obtained.

  On the other hand, when an overspeed state occurs due to dust clogging or the like, the lower surface of the cyclone portion 5 deforms the seal packings 16 and 17 due to the overspeed pressure (negative pressure) as shown in FIGS. Let it fall down. Therefore, a clearance S is generated in the seal packing 19 attached to the annular rib 18 on the upper surface side of the cyclone units 13 and 14, and air flows into the flow path portion 15 from there, so that the motor of the electric blower 2 is protected. It is configured.

  Moreover, the opening part 20 which connects the flow-path part 15 of the cyclone part 5 to the electric blower part 3 in the state in which the electric blower part 3 is mounted is formed on the upper surface of the cyclone part 5. The part 20 is provided with a pre-filter 21 for preventing dust from entering the electric blower part 3 even when the dust separation performance is deteriorated due to some cause, for example, partial breakage of the cyclone units 13 and 14. The prefilter 21 is configured to be detachably mounted for cleaning care and the like.

  If the pre-filter 21 as described above is removed after cleaning for cleaning and the like and the electric blower 2 is driven and the electric blower 2 is driven, dust may be sucked into the electric blower 2 and the electric blower 2 may break down. For this reason, measures are taken when a pre-filter is not installed. As a countermeasure, a microswitch that is turned on when the prefilter is attached is provided and the microswitch is turned on when the prefilter is attached. However, when the prefilter is not attached, the microswitch is not turned on and cannot be operated. In this case, there is a problem in terms of quality and cost because the configuration is complicated and there is a microswitch in the flow path.

  Therefore, in the present embodiment, in order to determine the mounting of the pre-filter 21 with a simple configuration, a lever (described later) that interlocks with the pre-filter 21 is provided at the connection location of the electric blower unit 3 and the cyclone unit 5, and the pre-filter 21 is When not attached, the connection between the electric blower unit 3 and the cyclone unit 5 is inhibited by the lever.

  More specifically, as shown in FIGS. 9 to 11, one side of the upper surface opening 20 of the cyclone unit 5 to which the prefilter 21 is attached is pivotally supported and tilted inward by a spring or the like. A lever 22 urged to do so is erected. As shown in FIG. 10, when the prefilter 21 is mounted, the lever 22 is raised to a slightly outward position by a protruding piece 21a formed on the outer peripheral edge of the prefilter 21, but as shown in FIG. When the pre-filter is not attached, it is tilted inward by an urging force such as a spring. On the other hand, the lower surface side of the electric blower unit 3 is formed with a recess 3c into which the lever 22 in the state when the prefilter 21 is mounted can be inserted.

  Therefore, when the pre-filter 21 is mounted as shown in FIG. 10, the lever 22 on the upper surface of the cyclone unit 5 is raised by the protruding piece 21a on the outer peripheral edge of the pre-filter 21, so that it is shown in FIG. Thus, the electric blower unit 3 can be set on the cyclone unit 5 without difficulty by entering the concave portion 3 c of the electric blower unit 3.

  On the other hand, as shown in FIG. 11, when the prefilter 21 is not attached, the lever 22 on the upper surface of the cyclone unit 5 is tilted inward by an urging force of a spring or the like. The electric blower unit 3 cannot be set on the cyclone unit 5 by hitting the outside of the concave portion 3c of the electric blower unit 3 to be set from above. Thereby, the user notices that the pre-filter 21 is not attached, and can set the electric blower unit 3 on the cyclone unit 5 by attaching the pre-filter 21 again.

  Further, as shown in FIG. 1 and the like, the large-diameter coarse dust cyclone unit 13 of the cyclone unit 5 has a filter 13b attached to an intake port 13a that protrudes in a cylindrical shape downward from the inner central portion and is formed on a side surface. And an outer cylinder 13e which is formed in a cylindrical shape outside the inner cylinder 13c and has a communication port 13d which communicates with the hose insertion port 9 via the suction cylinder 12 on the side surface. ing. The outer cylinder 13e is configured so as to extend into the dust box part 6 more than the inner cylinder 13c, and the lower end opening part 13f thereof faces the coarse dust box 6a in the dust box part 6.

  Further, the small-diameter fine dust cyclone units 14 of the cyclone portion 5 are formed at equal intervals on the outer peripheral side of the coarse dust cyclone unit 13, and each protrudes in a cylindrical shape downward from the inner central portion, and the bottom side opens. And an outer cylinder 14e which is formed in a cylindrical shape outside the inner cylinder 14c and has a communication port 14d which communicates with the inner cylinder 13c of the coarse dust cyclone unit 13 on the side surface. The outer cylinder 14e is extended downward in a funnel shape, and its lower end opening 14f faces the inside of a fine dust box 6b formed on the outer peripheral side of the dust box 6 corresponding to each fine dust cyclone unit 14. It is configured.

  As shown in FIG. 13, the dust box unit 6 includes a large-capacity coarse dust box 6 a in which coarse dust separated by the coarse dust cyclone unit 13 of the cyclone unit 5 described above is stored, and each fine dust cyclone unit on the outer peripheral side thereof. Five are provided at equal intervals corresponding to 14, and are divided into small dust dust boxes 6 b having a small capacity in which fine dust separated by the fine dust cyclone unit 14 is accumulated.

  By the way, in this type of cyclone unit, conventionally, the outer cylinder of the coarse dust cyclone unit has been formed to have substantially the same length as the inner cylinder. In this case, the coarse dust separated by the coarse dust cyclone unit and accumulated in the dust box part may adhere to the filter of the inner cylinder of the coarse dust cyclone unit due to some spring during turning in the die box part. When the operation switch of the vacuum cleaner is turned off and the swirl flow in the dust box is weakened, coarse dust is sucked up and adheres to the filter of the inner cylinder of the coarse dust cyclone unit. If coarse dust adheres to the filter of the inner cylinder, the electric blower is overspeeded as described above, which reduces the suction performance and causes a failure of the electric blower.

  As a countermeasure, an umbrella is provided under the inner cylinder of the coarse dust cyclone unit so that the coarse dust in the dust box part does not go toward the filter of the inner cylinder of the coarse dust cyclone unit. However, with this configuration, there arises a new problem that coarse dust is clogged between the cap portion of the inner cylinder and the outer cylinder.

  Therefore, in the present embodiment, in order to prevent the coarse dust accumulated in the coarse dust box 6a of the dust box portion 6 from adhering to the filter 13b of the inner cylinder 13c of the coarse dust cyclone unit 13, as described above, the coarse dust cyclone. The outer cylinder 13e of the unit 13 is extended into the coarse dust box 6a of the dust box part 6 rather than the inner cylinder 13c. Furthermore, in this embodiment, the outer cylinder 13e of the coarse dust cyclone unit 13 is extended to the same length as the outer cylinder 14e of the fine dust cyclone unit 14.

  With the above configuration, the coarse dust that has entered the coarse dust box 6a of the dust box portion 6 tends to accumulate in the weakly swirl portion (the portion where the flow is stagnant) 6c in the coarse dust dust box 6a while turning. . Therefore, even if the operation switch of the cleaner is turned off, the extended outer cylinder 13e becomes in the way and does not go to the filter 13b of the inner cylinder 13e of the coarse dust cyclone unit 13.

  On the other hand, the vacuum cleaner main body 1 of the present embodiment constituted by three detachable parts is detachably joined to the dust box part 6 and the cyclone part 5 as shown in FIGS. 9 to 13 and the like. A pair of first clamp mechanisms 23 and a pair of second clamp mechanisms 24 that detachably join the cyclone unit 5 and the electric blower unit 3.

  The first clamp mechanism 23 includes a clamp hook 23b provided on the dust box 6 side and having a hook portion 23a formed at the upper end thereof, a clamp lever 23c that rotatably supports the clamp hook 23b, and the clamp lever 23c. Is provided on the side of the cyclone unit 5 and a clamp washer 23e disposed on the inner side of the dust box 6 in order to fix the clamp base 23d with screws. And an engaging portion 23f with which the hook portion 23a of the clamp hook 23b is engaged.

  The second clamp mechanism 24 includes a clamp hook 24b provided on the cyclone portion 5 side and having a hook portion 24a formed at the upper end thereof, a clamp lever 24c that rotatably supports the clamp hook 24b, and the clamp lever. A clamp base 24d for rotatably attaching the 24c to the outer shell of the cyclone unit 5, a clamp washer 24e disposed inside the outer shell of the cyclone unit 5 for fixing the clamp base 24d with screws, and an electric blower unit 3 side The engaging portion 24f is provided and engages with the hook portion 24a of the clamp hook 24b.

  Usually, in the case of the above configuration, the first clamping mechanism 23 and the second clamping mechanism 24 are each composed of independent parts, but in that case, the number of parts increases and a problem arises in terms of cost.

  Therefore, in the present embodiment, the lower end side of the clamp washer 24e in the second clamp mechanism 24 that detachably joins the electric blower unit 3 and the cyclone unit 5 is extended downward so that the cyclone unit 5 and the dust box unit 6 are detachable. An engaging portion 23f with which the hook portion 23a of the clamp hook 23b to be joined is engaged is formed.

  In the configuration described above, when the operation switch of the vacuum cleaner is turned on and the electric blower 2 is driven, dust is removed from the vacuum cleaner main body 1 via the hose 8 to which an extension pipe and a floor suction tool (not shown) are connected. Is sucked into the cyclone section 5. Of the sucked dust, large dust (coarse dust) is swirled in the coarse dust cyclone unit 13 and is separated by the weight of the coarse dust itself and the filter 13b of the inner cylinder 13c. And stays in the dust box 6a while turning.

  On the other hand, fine dust (fine dust) passes through the coarse dust cyclone unit 13 and is separated from the air by the cyclone effect due to a higher-speed swirling flow by the plurality of fine dust cyclone units 14 in the next stage, and separated fine dust. Accumulates in the fine dust box 6 b of the dust box 6.

  The air from which the fine dust has been separated passes through the inner cylinder 14c of the fine dust cyclone unit 14 and is sucked into the electric blower unit 3 from the flow path unit 15 through the prefilter 21, and from the electric blower 2 through the exhaust filter 11, It is discharged to the outside through an exhaust port 3b formed in the outer peripheral portion.

  The dust accumulated in the dust box part 6 releases the first clamp mechanism 23 that detachably joins the dust box part 6 and the cyclone part 5, and causes the cyclone part 5 and the electric blower part 3 placed on the dust box part 6 to move. It can be easily discarded by removing it.

  In the above, in this embodiment, since the load of the electric blower unit 3 including the heavy electric blower 2 is applied to the upper and lower sealing packings 11c of the annular exhaust filter 11, the seal of the sealing packing 11c of the exhaust filter 11 is applied. Improves. Furthermore, when the electric blower 2 is operated, the electric blower unit 3 sinks downward due to the suction force, so that a further load is applied to the seal packing 11c, and the sealing performance is further improved.

  In this way, the sealing performance of the exhaust port 3b and the exhaust filter 11 is achieved with a simple configuration in which the load of the electric blower unit 3 and the load due to the suction of the electric blower 2 are applied to the exhaust filter 11 via the seal packing 11c. And dust can be effectively prevented from leaking from between the exhaust port 3b and the exhaust filter 11.

  In addition, the upper and lower two filter frame bodies 11b constituting the annular exhaust filter 11 are made common, and the boss 11d is taken out from each, without using a heavy and costly metal punching plate, It is possible to increase the strength of the exhaust filter 11 so that no load is applied to the filter medium 11a. This configuration is particularly effective in the present embodiment in which a load is positively applied to the exhaust filter 11 in order to improve the sealing performance of the seal packing 11c as described above.

  Moreover, when it becomes an overspeed state by dust clogging etc., the simple structure of moving the cyclone units 13 and 14 of the cyclone part 5 between the electric blower part 3 and the dust box part 6 below, and impairing the sealing performance ( The mechanism) can protect the motor during overspeed. Further, since a conventional air pressure fluctuation valve or the like is not required, the suction side of the electric blower unit 2 has a simple configuration, and there are no restrictions on design and configuration, which is advantageous in terms of cost.

  In addition, when the lever 22 interlocking with the prefilter 21 is provided at the connection location of the electric blower unit 3 and the cyclone unit 5 and the prefilter 21 is not attached, the connection between the electric blower unit 3 and the cyclone unit 5 is connected to the lever. The safety of the electric blower 2 against forgetting to attach the pre-filter 21 can be enhanced with a simple configuration that is obstructed by 22.

  Further, the outer cylinder 13e of the coarse dust cyclone unit 13 is extended from the inner cylinder 13c into the coarse dust box 6a where the separated coarse dust accumulates, and the coarse dust accumulated in the coarse dust box 6a is coarse. Adhering to the filter 13b of the inner cylinder 13c of the cyclone unit 13 can be prevented. Further, when the outer cylinder 13e of the coarse dust cyclone unit 13 is extended to the same length as the outer cylinder 14e of the fine dust cyclone unit 14, the cyclone unit 5 is disposed when the dust accumulated in the dust box unit 6 is discarded. Is removed from the dust box 6 and placed on the floor or the like, the outer cylinder 13e of the large-diameter coarse dust cyclone unit 13 is grounded and stabilized, and the outer cylinder 14e of the small-diameter fine dust cyclone unit 14 is protected. Can do. The outer cylinder 13e of the coarse dust cyclone unit 13 may be extended longer than the outer cylinder 14e of the fine dust cyclone unit 14.

  Moreover, the structure (Clamp washer 24e for attaching the clamp hook 24b which attaches | detaches the electric blower part 3 and the cyclone part 5 detachably) receives the clamp hook 23b which attaches the cyclone part 5 and the dust box part 6 detachably ( The simple configuration of using the engaging portion 23f) can suppress an increase in the number of parts, which is advantageous in terms of cost.

  Furthermore, since each clamp mechanism 23, 24 is generally made of metal, the electric blower unit 3, the cyclone unit 5, and the dust box unit 6 are electrically cut off by a packing or the like that seals each unit by adopting the above-described configuration. Since what has been connected is conductively connected, the static electricity accumulated in the cyclone unit 5 and the dust box unit 6 due to the swirling of dust or the like is supplied to the electric blower in the electric blower unit 3 via the clamp mechanisms 23 and 24. It is possible to escape to the motor.

  By the way, in the above-described electric vacuum cleaner, the clamp hook 23b of the first clamp mechanism 23 is released when the dust accumulated in the dust box part 6 is discarded about once a week, and the second clamp. The clamp hook 24b of the mechanism 24 is released when the prefilter 21 is cleaned and cleaned once every six months, and there is a difference in use frequency between the two.

  However, the clamp hook 23b of the first clamp mechanism 23 and the clamp hook 24b of the second clamp mechanism 24 may be close to each other in configuration, and the user is positioned just above when trying to throw away dust. There is a possibility that the clamp hook 24b of the two clamp mechanism 24 is erroneously released.

  FIG. 14 and FIG. 15 are diagrams showing the configuration and operation of the embodiment in which the above measures are taken, and the same reference numerals are used for the same or corresponding parts as those of the above-described embodiment.

  In the present embodiment, the electric blower unit 3 and the cyclone unit 5 are detachably attached to the engaging portion 23f with which the clamp hook 23b of the first clamp mechanism 23 that detachably joins the cyclone unit 5 and the dust box unit 6 is engaged. This is formed by extending the lower end side of the clamp hook 24b in the second clamp mechanism 24 to be joined.

  With the configuration as described above, when the user tries to throw away the dust accumulated in the dust box portion 6 and erroneously operates the clamp hook 24b of the second clamp mechanism 24, first, as shown in FIG. In addition, if the clamp hook 23b of the first clamp mechanism 23 is not released, the clamp hook 24b of the second clamp mechanism 24 cannot be released.

  In this way, if the clamp hook 23b that joins the dust box portion 6 and the cyclone portion 5 is not released with a simple configuration in which the clamp hook 23b that is frequently used is engaged with the clamp hook 24b that is less frequently used, the electric blower portion The clamp hook 24b which joins 3 and the cyclone part 5 cannot be released, and an operation error can be eliminated.

The longitudinal cross-sectional view which looked at the vacuum cleaner which concerns on one Embodiment of this invention from the side surface side. The longitudinal cross-sectional view which looked at the electric blower part single-piece | unit of the said embodiment from the side surface side. The longitudinal cross-sectional view which looked at the exhaust filter from the side surface side. The longitudinal cross-sectional view seen from the side surface which shows the state by which the exhaust filter and the electric blower part are not mounted in the upper surface of a cyclone part. The longitudinal cross-sectional view seen from the side surface which shows the state by which the exhaust filter was mounted in the upper surface of a cyclone part. It is a block diagram of the filter frame body of an exhaust filter, (a) is a general view, (b) and (c) are the principal part enlarged views. It is a block diagram of the exhaust filter using the said filter frame, (a) is a general view, (b) is a principal part longitudinal cross-sectional view. It is a figure which shows the effect | action of a normal use state and an overspeed state, (a) is a principal part longitudinal cross-sectional view at the time of a normal use state, (b) is the one part enlarged view, (c) is the principal part at the time of an overspeed state A longitudinal cross-sectional view, (d) is a partially enlarged view thereof. The longitudinal cross-sectional view which looked at the said vacuum cleaner from the front-back direction. The longitudinal cross-sectional view seen from the front-back direction which shows the state with which the pre filter was mounted | worn in the state in which the electric blower part is not mounted. The longitudinal cross-sectional view seen from the front-back direction which shows the state by which the pre-filter is not mounted | worn with the electric blower part not mounted. The longitudinal cross-sectional view seen from the front-back direction which shows an effect | action at the time of trying to mount an electric blower part in the cyclone part without a pre-filter mounting | wearing. The arrangement block diagram of the coarse dust dust box of a dust box part, and a fine dust dust box. The longitudinal cross-sectional view seen from the front-back direction which shows other embodiment of this invention. The longitudinal cross-sectional view seen from the front-back direction which shows the effect | action.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vacuum cleaner main body 2 Electric blower 2a Suction port 3 Electric blower part 3a Exhaust flow path 3b Exhaust port 3c Concave part 4 Dust collection part 5 Cyclone part 6 Dust box part 6a Coarse dust box 6b Fine dust box 9 Hose outlet 11 Exhaust filter 11a Filter media 11b Filter frame 11c Sealing packing 11d Boss 11e, 11f Rib 13 Coarse dust cyclone unit 13a Inlet 13b Filter 13c Inner cylinder 13d Communication port 13e Outer cylinder 13f Lower end opening 14 Fine dust cyclone unit 14c Inner cylinder 14d Communication port 14e outer cylinder 14f lower end opening 15 flow path 16, 17 seal packing 18 annular rib 19 seal packing 20 opening 21 prefilter 21a projecting piece 22 lever 23 first clamp mechanism 23a hook 23b Pufukku 23c clamp lever 23d clamp base 23e clamping washer 23f engaging portion 24 second clamping mechanism 24a hook portion 24b clamp the hook 24c clamp lever 24d clamp base 24e clamping washer 24f engaging portion

Claims (6)

  An exhaust for discharging the exhaust from the electric blower, comprising an electric blower having a built-in electric blower, and a dust collecting part for collecting the dust in the air sucked by the electric blower on which the electric blower is placed A vacuum cleaner comprising an exhaust filter that is sandwiched between the electric blower section and the dust collection section via a seal member in an exhaust passage to the mouth.   The dust collecting unit is composed of a cyclone unit including a cyclone unit that separates dust in the air sucked by the electric blower by a cyclone method, and a dust box unit in which dust separated by the cyclone unit is accumulated, 2. The electric vacuum cleaner according to claim 1, wherein the sealing performance of the sealing member of the cyclone portion is impaired when the blower is in an overspeed state.   The dust collecting unit includes a cyclone unit including a cyclone unit that separates dust in the air sucked by the electric blower by a cyclone method, and a dust box unit in which the dust separated by the cyclone unit is accumulated. The vacuum cleaner according to claim 1 or 2, wherein an outer cylinder of the unit extends from the inner cylinder to the dust box side.   The cyclone unit has a large-diameter coarse dust cyclone unit that separates coarse dust in the intake air sucked by the electric blower, and a small diameter that separates fine dust in the intake air from which the coarse dust is separated by the coarse dust cyclone unit. A fine dust cyclone unit, and the outer cylinder of the coarse dust cyclone unit is extended to the dust box part side of the inner cylinder and formed more than the outer cylinder of the fine dust cyclone unit. 3. The electric vacuum cleaner according to 3.   The first clamp mechanism that detachably joins the dust box part and the cyclone part, and the second clamp mechanism that detachably joins the cyclone part and the electric blower part, and a clamp hook of the first clamp mechanism The electric vacuum cleaner according to any one of claims 2 to 4, wherein an engaging portion with which the second engaging mechanism is engaged is formed in the second clamp mechanism. 6. The electric vacuum cleaner according to claim 5, wherein an engaging portion with which the clamp hook of the first clamp mechanism is engaged is formed in the clamp hook of the second clamp mechanism.

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