JPH0822265B2 - Electric vacuum cleaner - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner, and more particularly to a vacuum cleaner effective for mounting a paper bag filter on a vacuum cleaner.

[Conventional technology]

Conventionally, in this type of vacuum cleaner, when the paper bag filter is mounted on the vacuum cleaner, the mounting plate of the paper bag filter is fixed to the paper bag filter mounting portion provided in the main body dust collecting chamber by a mounting bracket or the like.

[Problems to be Solved by the Invention]

However, in such a conventional mounting structure, even if the dust suction port provided on the mounting plate of the paper bag filter and the suction port provided on the main body side are displaced from each other, they are forcibly held by the mounting bracket. As a result, the inhaled dust is not collected by the paper bag filter, and the dust leaks into the dust collection chamber.

In addition, when mounting the paper bag filter in the dust collection chamber, the mounting bracket must be operated one by one, and moreover, the mounting bracket must be operated when removing the paper bag filter from the dust collection chamber to dispose of the dust. The operability of attaching / detaching was extremely poor.

An object of the present invention is to provide an electric vacuum cleaner which can prevent the sucked dust from leaking into the dust collecting chamber and can easily perform the attachment / detachment operation of the paper bag filter in the dust collecting chamber.

[Means for solving the problem]

A feature of the present invention to solve the above-mentioned problems is that the dust collecting chamber is formed on the upstream side of the cleaner body, and has a bag-like shape that is provided in the dust collecting chamber so as to be freely taken in and out and has a support plate. A disposable paper bag filter, a filter loading / unloading opening which is provided in the cleaner body so that the paper bag filter can be taken in and out, and a larger opening than the outer periphery of the support plate, and a vacuum cleaner body provided so as to cover the opening. A lid having a suction port, a suction packing provided on the outer periphery of the suction port of the lid and abutted on the support plate so as to maintain airtightness, and a seal packing outside the opening. The paper bag filter is provided so as to be rotatable and projectable, the support plate of the paper bag filter is detachably attached, and the outer circumference of the filter support body is smaller than the opening of the opening, To hold the dust collection chamber is to have a recess for fitting the filter support plate provided on the filter support.

[Action]

According to the present invention, when the paper bag filter is mounted in the dust collecting chamber, the filter support plate is fitted into the recess provided in the filter support body, so that the filter support plate is positioned and the suction port seal is formed. The positional relationship between the packing and the paper bag filter support plate is also maintained at a predetermined position, and it is possible to prevent the sucked dust from leaking into the dust collection chamber.

Further, when mounting the paper bag filter in the dust collecting chamber, the mounting bracket is not required, so that the paper bag filter can be easily attached and detached.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

The vacuum cleaner body of the electric vacuum cleaner according to the present embodiment has a main body case 1
And a dust case 2.

The body case 1 and the dust case 2 are detachably connected as shown in FIG. As shown in FIGS. 1 and 2, this connection is performed by inserting the hooking portion 4 provided at the lower portion of the dust case 2 into the receiving groove 3 provided at the lower portion of the main body case 1, and providing the upper portion of the dust case 2. By inserting the rear side of the substrate 6 of the handle 5 into the handle substrate receiving concave portion 7 of the main body case 1, and engaging the engaging claw 9 of the clamp 8 provided on the upper portion of the main body case 1 with the substrate 6 of the handle 5. Done.

The body case 1 is provided with an electric blower 10 and a cord winding device 11 inside.

As shown in FIG. 3, the main body case 1 is composed of a left main body case portion 1a and a right main body case portion 1b which are divided into left and right parts with vertical division surfaces. Left and right body case
1a and 1b are fixed by screws (not shown).

The left and right body case portions 1a and 1b have a front wall 12 and a communication port 13
An exhaust port 15 is provided at 4. In the body case 1,
The electric blower storage chamber 16 and the cord winding device storage chamber 17 are separated by a partition plate 18. On the upper side of the electric blower storage chamber 6, there is provided a spare filter storage chamber 20 for storing spare parts for the first fine dust collecting filter 19, which will be described in detail later. The spare filter storage room 20 and the electric blower storage room 16 are
It is partitioned by the partition plate 21.

The partition plates 18 and 21 extend at right angles to the division surface of the main body case 1 and inside the left main body cases 1a and 1b, respectively.

The preliminary filter storage chamber 20 has an opening on the outer wall surface of the right main body case 1b. The first fine dust collecting filter 19 is put in and taken out of the spare filter storage chamber 20 through this opening. Usually, a detachable lid 22 is attached to the opening to close the opening.
The lid 22 has a handle hole 23 and a locking claw 24.
Thus, the lid 22 is freely locked in the opening.

The sound generated from the electric blower 10 leaks to the outside of the main body case 1 during use, but since the upper inside of the main body case 1 has a double partition structure with the auxiliary filter storage chamber 20, it is leaked to the outside. And noise can be reduced. The spare filter storage room 20, the electric blower storage room 16 and the cord winder storage room 17 are the main body case 1
It can be formed by a molding die that is drawn to the side of the divided surface. If the preliminary filter storage chamber 20 were formed vertically on the outer side wall of the main body case 1, the molding die would be complicated and the molding workability would be poor.

The dust indicator 25 is provided below the opening of the right main body case 1b. This dust indicator 25
Is connected to the negative pressure communication port 26 and is fixed by the dust indicator cover 27. The cover 27 is fixed by a screw 28 inserted from the inside of the right main body case 1b.

Since the negative pressure communication port 26 opens in the same direction as the opening of the preliminary filter storage chamber 20, it is possible to easily remove the molding die.

The cord winding device 11 has a cord reel 31 for winding the cord 30. The teeth 32 are provided on the outer circumference of the cord reel 31.
The tooth portion 32 is meshed with an intermediate gear 33 rotatably supported on the front wall 12 side of the main body case 1.
A drive coupling 34 is attached to the intermediate gear 33, and the drive coupling 34 is exposed on the outer surface of the front wall 10.

The drive coupling 34 is connected to the dust removing device side of the dust collecting filter unit, which will be described later, provided on the dust case 2 side.

Next, the structure of the dust case 2 will be described. The dust case 2 has a tubular shape, as shown in FIGS. 1, 2, and 4.

On the front side of the dust case 2, the first fine dust collecting filter
An opening for the first fine dust collecting filter for inserting and removing 19 is formed. A filter support plate 36 that can be opened and closed is provided in the opening for the first fine dust collecting filter.
The filter support plate 36 is rotatably supported by a support shaft 37 provided below the opening for the first fine dust collecting filter, and the support plate 36 is pivoted about the support shaft 37 so as to be tilted forward. it can.

Since the height of the filter support plate 36 is almost half the height of the opening for the first fine dust collecting filter, closing the filter support plate 36 closes the lower half of the opening for the first fine dust collecting filter. .

On the surface of the filter support plate 36, a recess 38 that is pulled out to the upper end
Stepped receiving portions 39 for receiving a part of the first fine dust collecting filter 19 are formed at the left and right upper ends of the recess 38.

A stepped receiving portion 40 for receiving a part of the first fine dust collecting filter 19 is also formed on the upper side of the opening for the first fine dust collecting filter.

The functions of the receiving portions 39, 40 and the concave portion 38 will be described in detail later.

The dust case lid 43 closes the first fine dust collecting filter opening from the outside of the filter support plate 36.
A support shaft 44 is rotatably supported at a lower portion of the dust case 2, and the lid 43 can be rotated about the support shaft 44 as a fulcrum so as to be tilted forward.

The dust case lid 43 is a suction hose (not shown).
Has a hose connection port 45 and a clamp 46.

The clamp 46 is provided with an engaging claw 47, and the engaging claw 47 engages with and disengages from an engaging portion 48 provided in the dust case 2. The opening for the first fine dust collecting filter of the dust case 2 is closed by the dust case lid 43 by engaging the engaging claw 47 of the clamp 46 with the engaging portion 48.

Regarding the structure of the inner surface of the dust case lid 43,
More on this later.

The body case 1 is detachably coupled to the rear side of the dust case 2. A coupling portion side opening is provided on the rear side of the dust case 2, and a dust collecting filter unit 49, which will be described in detail later, is put into and taken out of the dust case 2 from the coupling portion side opening.

The dust case 2 has a first fine dust collecting filter on the inner wall surface.
It has a plurality of filter holding ribs 50 for holding 19 from the outer periphery. The filter holding rib 50 extends from the inner part of the opening on the coupling side toward the opening for the first fine dust collecting filter.

Further, between the filter holding ribs 50, filter withdrawing guide ribs 50 'extending in the same direction as the ribs 50 are provided close to the opening side for the first fine dust collecting filter. The filter pull-out guide rib 50 'is inclined so as to be higher toward the opening side for the first fine dust collecting filter.

A top plate 55 is formed on the upper inner side of the dust case 2, and an insert portion 56 into which the substrate 6 of the handle 5 is inserted is provided on the top plate 55.

For the handle 5, the handle pieces 5a and 5b are held together, and the screw 57
It is configured by tightening together. Screw seat 58 for handle 5
Are fitted in the receiving portions 59 of the handle pieces 5a, 5b.
To attach the screw seat 58 to the receiving part 59, handle part 5a, 5b
This is done in the assembly process of tying together.

After the handle 5 is inserted into the insertion portion 56, the handle 5 is fixed to the dust case 2 by a screw 60 that is screwed into the screw seat 58 from the inside of the dust case 2 through the top plate 55. This screw seat
Since 58 is located substantially in the center of the handle 5, that is, on the center of gravity when carrying the electric vacuum cleaner, an unreasonable load is not applied to the receiving portion 59 holding the screw seat 58.

Next, the structure of the first fine dust collecting filter 19 will be described. As shown in FIGS. 1, 2, and 3, the first fine dust collecting filter 19 is composed of a bag-like body 65 and a support plate 66. The bag-shaped body 65 is made of thin flexible paper having air permeability. The support plate 66 is made of hard paper such as cardboard. The support plate 66 and the bag-shaped body 65 are bonded by an adhesive.

The support plate 66 has a dust suction port 67 and a blocking lid portion 68. The covering lid portion 68 can be easily bent by a bending line 69 formed on one side of the support plate 66. Two cut lines 70 are provided at the tip of the covering lid portion 68. The engagement piece 71 formed by the two cut lines 70 is relatively easy to bend due to the cut line 70. The support plate 66 is formed by punching out a single plate material, so that it can be easily performed.

The covering lid portion 68 closes the dust suction port 67 by bending the covering lid portion 68 and aligning it with the support plate 66. In order to keep the cover lid 68 in this state, the engagement piece 71 is slightly bent and engaged with the inner edge portion of the dust suction port 67.

The first fine dust collecting filter 19 is very compact because the bag-shaped body 65 and the closing lid portion 68 are folded as shown in FIG. 3 before use. Therefore, the storage of the first fine dust collecting filter 19 does not take up a large space, and
The filter 19 can be easily put in and taken out of the first fine dust collecting filter storage chamber 20.

Next, the attachment of the dust case 2 of the first fine dust collecting filter 19 will be described.

Open the cover lid portion 68 of the first fine dust collecting filter 19 and, as shown in FIG. 9, attach the cover lid portion 68 to the filter support plate 36.
The bag-like body 65 into the dust case 2
The first fine dust collecting filter 19 is held on the side of the opening of the dust case 2 for the first fine dust collecting filter by inserting the first fine dust collecting filter 19 into the receiving portion 39, 40 with the upper and lower portions of the support plate 66 fitted therein. .

After that, by closing the dust case lid 43,
The vacuum cleaner is ready for use.

As described above, the attachment of the first fine dust collecting filter 19 is easily performed by fitting the support plate 66 into the receiving portions 39, 40 of the dust case 2.

Next, the inner structure of the dust case lid 43 will be described. As shown in FIGS. 1 and 5, the dust case lid 43
An inner cover plate 75 is provided inside the. The inner cover plate 75 is fixed to the dust case lid body 43 by a screw 77 screwed into a screw seat 76.

A deflection suction port 78 is provided above the center of the inner cover plate 75. The discharge portion of the deflection suction port 78 is directed downward, and the curved portion of the guide 79 is provided with a ventilation hole 80.

The connection port of the deflection suction port 78 is connected to the inner tip of the hose connection port 45 via a seal packing 85. A check valve 86 is integrally formed with the seal packing 85. The check valve 86 is made of an elastic material such as rubber or soft vinyl chloride. The check valve 86 is movable around a connecting portion with the seal packing 85. The check valve 86 is located inside the deflection suction port 78, and is connected to the hose connection port.
It is automatically opened by the force of the air flow passing through 45, and is automatically closed when there is no air flow.

Functions of the deflecting suction port 78, the vent hole 80, and the check valve 86 will be described later in detail.

The inner cover plate 75 has a seal packing 90 for the outer periphery and the lid.
Is attached. An annular tongue piece 91 is formed on the inner surface of the lid seal packing 90. This tongue 91
When the dust case lid 43 is closed, is joined to the outer peripheral side end surface of the first fine dust collecting filter opening of the dust case 2 to keep the dust case 2 and the dust case lid 43 airtight.

A seal packing for the suction port is provided on the outer periphery of the deflecting suction port 78.
92 is attached. A locking projection 93 is formed on the suction port seal packing 92. By inserting the locking projection 93 into the locking hole of the inner cover plate 75, the inner cover of the suction port seal packing 92 is formed. Attached to plate 75. Further, the suction seal packing 92 is integrally formed with the lid seal packing 90 with a connecting portion 94.

The seal packing 92 for the suction port is the dust case lid 43.
When it is closed, it abuts against the support plate 66 of the first fine dust collecting filter 35, thereby keeping the support plate 66 and the inner cover plate 75 side airtight. Further, when the dust case lid 43 is closed, the deflection suction port 78 is the dust suction port of the support plate 66.
It faces the bag 65 through 67.

Next, the configuration of the dust collecting filter unit 49 will be described.

As shown in FIGS. 1 and 6, the dust collecting filter unit 49 is mainly composed of a coarse dust collecting filter body 100, a second fine dust collecting filter frame 102, a filter supporting substrate 103, and a supporting seal packing 104. Has been done.

The coarse dust collecting filter frame 100 is provided with a flat coarse dust collecting filter 105 on the front surface, and auxiliary coarse dust collecting filters 106 on the side surface and the upper surface.

Both filters 105 and 106 are made of nylon, polyethylene, polypropylene or the like in which a thread is knitted in a mesh shape, and the size of the vents of the filters is sufficiently larger than that of the first fine dust collecting filter 19. is there. That is, the first fine dust collecting filter 19 can collect fine dust such as sand, while the filters 105 and 106 pass fine dust.

The second fine dust collecting filter frame 102 is provided with a second fine dust collecting filter 107 formed by corrugating a non-woven fabric. The size of the ventilation holes of the second fine dust collecting filter 107 is formed to be substantially the same as that of the first fine dust collecting filter 19. In this way, since the second fine dust collecting filter 107 is arranged on the downstream side of the first fine dust collecting filter 19, the second stage fine dust collecting filter 19 collects the dust not collected by the first fine fine dust collecting filter 19. The dust can be collected by the dust collecting filter 107, and fine dust will not be blown out from the exhaust port 15 of the main body case 1.

The filter support substrate 103 has a dust removing gear body 108 on the front side.
And a dust remover manual handle 109 is rotatably supported on the rear side. A dust remover 110 formed of an elastic body is fixed to the front surface of the dust remover gear body 108 with a screw 111, and the screw 111 is screwed into a dust remover manual handle 109, thereby removing the dust remover 110 and the dust remover gear. The body 108 and the dust remover manual handle 109 are attached together with the filter support substrate 103.

The rear side of the second fine dust collecting filter frame 102 and the front side of the filter supporting substrate 103 are aligned with each other, and a holding seal packing 104 is fitted on the outer circumferences of both to form a pair of the two, and the coarse dust collecting filter frame 100 The second fine dust collecting filter 107
The dust collecting filter unit 49 is configured by mounting the dust collecting filter unit 49 from the side.

The dust collecting filter unit 49 is fitted into the dust case 2 to hold the holding seal packing 10.
The outer periphery of 4 is airtightly joined to the inner wall surface of the dust case 2.

Since the tip of the dust remover 110 is in contact with the rear surface (rear surface) of the second fine dust collecting filter 107, a manual handle for the dust remover is provided.
By rotating 109, the back surface is rubbed so as to be repelled by the tip of the dust remover 110. By this rubbing, the second
The fine dust collecting filter 107 vibrates, and fine dust adhering to the front surface of the filter 107 is removed. Inside the coarse dust collecting filter frame 100, a percussion vibration type dust removing device is provided.

That is, as shown in FIG. 1, FIG. 6, FIG. 11 and FIG. 12, the support boss portion 121 is provided on the rear surface (rear surface) of the air-impermeable portion 120 provided substantially in the center of the coarse dust collecting filter 105.
Is provided. A striking rod 122 made of a spring material is attached to the support boss 121. This installation is
This is performed by a screw 123 and a seat plate 124 that screw one end of the striking rod 122 into the support boss 121.

The receiving projection 125 facing the free end side which is the other end of the striking rod 122 is formed integrally with the back side of the coarse dust collecting filter 105. The vibration transmission body 126 stretched to the left and right from the base of the receiving projection 125 and stretched on the coarse dust collecting filter 105 has a tuning fork shape.

When the hitting projection 125 is hit by the striking rod 122, the coarse dust collecting filter 105 vibrates. Since the vibration transmitter 126 is in the shape of a tuning fork, its vibration is well transmitted to the entire coarse dust collecting filter 105. Also, since the striking rod 122 hits the tip side closer than the root of the receiving projection 125, it is a coarse dust collecting filter.
As shown in FIG. 12, 105 vibrates like a seesaw around the receiving projection 125. With this seesaw-like vibration,
The first fine dust collecting filter 19 joined to the surface of the coarse dust collecting filter 105 is continuously struck from the outer surface,
Dust adhering to the inner surface of the filter 19 is removed.

Bearing 1 provided on the upper side of the second fine dust collecting filter frame 102
30 rotatably supports a cam body 132 via a seal packing 131. On the back side of the bearing 130, the idle gear body 1
33, a clath ring 134, a spring 135, a connecting cylinder 136 are attached,
These are fixed by screws 137 screwed onto the cam body 132.

The rotation of the cam body 132 is performed by rotating the idle gear body 133. However, the cam body 132 rather than the idle gear body 133
The rotation transmitted to is only one rotation by the clutch ring 134.

The cam body 132 is positioned so as to be joined to the free end of the striking rod 122, and the tooth portion of the idle gear body 133 is meshed with the tooth portion of the dust removing gear body 108. By rotating the handle 109, the cam body 132 rotates via the dust removing gear body 108. The free end of the striking rod 122 is repelled by the rotation of the cam body 132, so that the striking rod 122 strikes the receiving projection 125 as described above.

The bearing 140 of the filter support substrate 103 rotatably supports the passive coupling 142 via the spring 141, and the passive coupling 142 is prevented from coming off via the seat plate 143.
By means of a screw 144 which is screwed onto.

The passive coupling 142 has teeth formed thereon, and the teeth are meshed with the teeth of the dust removing gear body 108.
Further, the passive coupling 142 is engaged with the drive coupling 34 by connecting the dust case 2 to the main body case 1, and the both couplings 34, 142 are connected. By this connection, the rotational force of the cord reel 31 of the cord winding device 11 is transmitted to the dust removing device provided in the dust collecting filter.

Since one rotation of the cam body 132 described above is aligned with the rotation direction of the cord reel 31 when the cord 30 is pulled out,
The cam body 132 does not rotate when the cord reel 31 rotates when the cord 30 is wound up. This contributes to downsizing of the rewind mainspring of the cord winding device 11 that rotates the cord reel 31.

The above is the description of the vacuum cleaner according to the embodiment mainly from the viewpoint of configuration. Next, the operation based on this configuration will be described.

When the electric blower 10 is operated, the air flow containing dust passes through the suction hose, the hose connection port 45, and the deflection suction port 78, and the
The fine dust collecting filter 19 flows into the bag-shaped body 65. Here, coarse dust and fine dust are collected, and air and a small amount of fine dust pass through the ventilation holes of the bag-like body 65, further pass through the coarse dust collecting filters 105 and 106, and flow toward the second fine dust collecting filter 107 side. Here, the fine dust is recollected, the air passes through the ventilation holes of the second fine dust collecting filter 107, and the exhaust port 15 of the main body case 1
More exhausted.

In the stairs attached to the dust case 2, the first fine dust collecting filter 19 is in a folded state of the bag-shaped body 65, but when air flows into the bag-shaped body 65, the wind pressure and the bag-shaped body 65 The bag-shaped body 65 swells due to the static pressure applied to the outer peripheral surface of the. Puffy bag 65 is a coarse dust collecting filter 105
And since the outer periphery is pressed by the filter holding rib 50,
No more swelling, dust is collected in this state.

As described above, the outer periphery of the bag-like body 65 has a coarse dust collecting filter.
Although it is held by the 105 and the filter holding rib 50, the air permeability of the bag-like body 65 is not impaired. That is, the coarse dust collecting filter 105 has sufficient air permeability, and since there is an air passage between the filter holding ribs 50, the air flow to the outer periphery of the bag-shaped body 65 is not blocked.

The dust collection inside the bag-shaped body 65 proceeds from the portion facing the coarse-grain dust collection filter 105. When the clogging of the facing portion progresses, most of the airflow passes through the portion facing the filter holding rib 50, and further, the coarse particle collecting filter 10 provided on the side surface and the upper side of the coarse particle collecting filter frame 100.
The state of flowing through 6 toward the second fine dust collecting filter 107 side is taken.

Thus, the bag-shaped body 65 of the first fine dust collecting filter 19 is collected.

When the amount of dust adhering to the bag-shaped body 65 and the second fine dust collecting filter 107 increases and the suction force decreases, the cord reel 31 of the cord winding device 11 is rotated or the manual handle 109 for dust remover is used. When rotated, as described above, the dust remover 110 is actuated to remove dust from the second fine dust collecting filter 107, and the impact rod 122 is actuated to remove dust from the bag 65.

The dust removal of the bag-shaped body 65 is performed by the vibration of the coarse dust collecting filter 105 side due to the operation of the striking rod 122 as described above, so that the bag-shaped body 65 is not damaged.

That is, since the bag-shaped body 65 is formed of a relatively weak material such as paper, if the outer surface of the bag-shaped body 65 is directly rubbed with something like the dust remover 110, it will be broken. However, since the dust removing vibration force is applied to the bag-shaped body 65 through the coarse-grained dust collecting filter 105, an unreasonable force for breaking the bag-shaped body 65 is not applied.

Further, since the coarse dust collecting filter 105 vibrates like a seesaw around the receiving projection 125 as described above,
Due to the seesaw-like vibration, the bag-like body 65 is repeatedly bent inward from the outer surface and is subjected to a striking force, so that the dust adhering to the inner surface of the bag-like body 65 is effectively removed.

Further, dust is remarkably attached to the portion of the bag-shaped body 65 that abuts the coarse-grain dust collecting filter 105, but dust removal vibration is applied to this portion, so dust removal is effectively performed and it greatly contributes to recovery of the dust collection capability. is there. In this way, by repeatedly using the first fine dust collecting filter 19 and the like while repeating the dust removal in a timely manner, the dust is filled without leaving an extra space in the first fine dust collecting filter 19.

At this time, the first fine dust collecting filter filled with dust
Remove 19 from the dust case 2 and install a new first fine dust collecting filter 19.

That is, the removal of the first fine dust collecting filter 19 is
First, as shown in FIG. 10, the clamp 46 is operated to open the dust case lid 43, and the dust suction port 67 is closed by the closing lid portion 68 of the first fine dust collecting filter 19 as described above.
After that, the filter support plate 36 is opened by pulling the first fine dust collecting filter 19 outward with the support plate 66, so that the first fine dust collecting filter 19 is placed in the dust case 2 as shown in FIG. You can easily pull it out.

At the time of this withdrawal, since the dust suction port 67 is closed by the blocking lid portion 68, dust does not spill from the suction port 67. The first fine-particle collecting filter 19 that has been pulled out is discarded while containing the dust. Further, the first filter for collecting fine particles 19 can be more easily drawn out by the filter drawing-out guide rib 50 '.

Since the attachment of the new first fine dust collecting filter 19 has been described above, the description thereof will be omitted here.

The removal of the first dust collecting filter 19 and the attachment of the new first dust collecting filter 19 are performed by opening the dust case lid 43 and opening the first fine dust collecting filter on the front side of the dust case 2 as described above. Since the dust collection filter unit 49 is detached, it is possible to perform it independently of the removal of the dust collecting filter unit 49, which is easy to handle.

The amount of dust collected by the second fine dust collecting filter 107 in the dust collecting filter unit 49 is very small (95% or more is collected by the first fine collecting filter 19), and therefore the second fine collecting filter 19 is used. The amount of dust dumped by the dust collection filter 107 is extremely small compared with the replacement of the first fine dust collection filter 19.

Nevertheless, the reason why the second fine dust collecting filter 107 is dusted or the dust is discarded is as follows.

In other words, even if the first fine dust collecting filter 19 is replaced with a new one, if dust is attached to the second fine dust collecting filter 107, the suction capability of the electric vacuum cleaner will not be completely restored. Despite the fact that it was replaced with the new 1st fine dust collecting filter 19, there is a problem that it is inferior in terms of suction performance.
Therefore, it is necessary to remove dust from the filter 107 to recover the suction capacity of the filter 107.

Further, when the amount of collected dust on the side of the second fine dust collecting filter 107 is more than a certain amount, even if dust is removed, the removed dust is re-reflected remarkably. Ability deteriorates. In such a case, as shown in FIG. 8, attach the dust collecting filter unit 49 to the dust case 2
You have to take it off and throw away the dust.

The dust on the side of the second fine dust collecting filter 107 is discarded, or the maintenance and inspection of the dust collecting filter unit 49 is performed by removing the dust collecting filter unit 49 from the opening on the joint side on the rear side of the dust case 2. It can be performed independently of the removal of the first fine dust collecting filter 19 and is easy to handle.

The necessity of removing dust from the first and second fine dust collecting filters 19 and 107 will be described in more detail with reference to the graphs shown in FIGS. 14 and 15.

That is, FIGS. 14 and 15 show both filters 19,107.
The relationship between the suction strength and the amount of collected dust is shown in comparison with the presence or absence of dust removal.

First, as shown in FIG. 14 (showing the characteristics of only the first fine dust collecting filter 19), when the first dust collecting filter 19 is not dust-removed, the dust collecting performance characteristics shown in (a) are shown. That is, as the amount of dust collection increases, the first dust collection filter
The clogging of 19 progresses, the suction strength (suction strength) sharply decreases, and the suction strength is saturated immediately (based on the saturation display of the indicator 25). The dust collection capacity in this case is V. On the other hand, when the dust removal of the first dust collection filter 19 is performed in a timely manner, the dust collection performance characteristic represented by (B) is exhibited. That is, when used while performing dust removal in a timely manner, the dust attached to the first dust collecting filter 19 is removed and the clogging is eliminated, so the suction strength is restored and the suction strength increases as the amount of dust collection increases. It does not decrease sharply. Therefore, when the suction strength reaches saturation, the dust collection capacity is 2.5 to 3 V, that is, the dust collection capacity is increased 2.5 to 3 times as compared with the case where the dust removal is not performed.

Next, as shown in FIG. 15, the dust collection performance characteristics (c) of the entire electric vacuum cleaner are as follows: the dust collection performance characteristics (d) of the first fine dust collection filter 19 and the second fine collection performance characteristics. It becomes the sum with (e). Here, for convenience of explanation, it is assumed that the dust removal of both filters 19 and 107 is not performed until the suction strength is saturated. When the suction strength is saturated, the new first fine dust collecting filter 19 is replaced with a new one, and the lowered suction strength amount b of this filter is completely recovered. However, since the reduced suction strength of the entire vacuum cleaner is c, the suction strength is not completely recovered as a whole. That is, the reduction amount a of the suction strength of the second fine dust collecting filter 107 remains.

Therefore, by removing dust from the second fine dust collecting filter 107, the suction strength of the filter 107 is restored, and the suction strength of the entire electric vacuum cleaner is completely restored.

As described above, in the two-stage structure in which the second fine-particles collecting filter 107 is provided on the downstream side of the first fine-particles collecting filter 19, the first fine-particles collecting filter 19 is replaced to expect the recovery of the suction ability. As described above, it is absolutely necessary to remove dust from the second fine filter 107.

The dust airflow flowing into the bag-like body 65 is deflected downward by the deflecting suction port 78, and the flow velocity is attenuated by this, so that the bag-like body is
The collision force of the dust airflow on the 65 is softened, which contributes to preventing the bag-like body 65 from being damaged.

In particular, since the check valve 86 made of an elastic material is provided inside the deflecting suction port 78, a dust air flow damping effect can be further expected. That is, as shown in FIG. 13, the backflow prevention valve 86 is opened to the position where it is blocked by the deflection suction port 78 by the dust air flow. Since the opening angle of the check valve 86 is approximately 45 °, the dust flow collides with the check valve 86 and drifts downward. Since the check valve 86 has elasticity,
Due to the collision of the dust airflow, the collision surface is bent and the flow velocity of the airflow is greatly attenuated.

Further, the ventilation hole 80 is provided in the curved portion of the guide 79 that constitutes the deflection suction port 78 to prevent the check valve 86 from fluttering and vibrating due to the dust air flow. That is, when the collision surface bends due to the collision of the dust airflow with the check valve 86, the air in the space formed by the check valve 86 and the guide 79 is discharged from the vent hole 80. However, if the vent hole 80 is not provided, the air in the space is compressed, and this compression causes a repulsive force to act on the check valve 86. Then, since the collision force of the dust flow on the check valve 86 changes, the repulsive force accompanying the compression also changes, and the change of the repulsive force causes the check valve to vibrate.

However, as described above, since the vent hole 80 is provided in the curved portion of the guide 79, the repulsive force to the check valve 86 due to the compression of air as described above does not occur, and the check valve 86 vibrates. Does not occur. The above is the first in the dust case 2.
Although the use mode when the fine dust collecting filter 19 is set is described, the vacuum cleaner can be used without using the first fine dust collecting filter 19.

In this case, the coarse dust is collected in the inner space of the dust case 2, which is the front side of the coarse-grain dust collecting filter 105, and the fine dust is collected by the second fine-grain dust collecting filter 107.

It is convenient to remove the dust collecting filter unit 49 and discard the collected dust from the opening on the coupling portion side of the dust case 2 because coarse dust and fine dust can be discarded at once.

When the first fine dust collecting filter 19 is used, the coarse dust collecting filter 106 does not function as a dust collecting filter, and mainly has a function of holding the first fine dust collecting filter 19 from the outer surface. On the other hand, when the first fine dust collecting filter 19 is not used, the coarse dust collecting filter 106 is
It functions as an original dust collecting filter. Also,
Since the coarse-grain dust collecting filter 105 can collect only coarse dust and fine dust is collected by the second fine-grain dust collecting filter 107, the second fine-grain dust collecting filter 107 has an original fine dust-collecting function. Demonstrate.

The dust removal by the second fine dust collecting filter 107 is performed in the same manner as the above-mentioned case, but the dust removal by the coarse dust collecting filter 105 is performed by the vibration of the impact rod 122 when the filter 105 vibrates.

〔The invention's effect〕

As described above, according to the present invention, when the paper bag filter is mounted in the dust collection chamber, the filter support plate is fitted into the recess provided in the filter support body, so that the filter support plate is positioned. The positional relationship between the suction-port seal packing and the paper bag filter support plate is also maintained at a predetermined position, and the sucked dust can be prevented from leaking into the dust collection chamber.

Further, when mounting the paper bag filter in the dust collecting chamber, the mounting bracket is not required, so that the paper bag filter can be easily attached and detached.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a vertical sectional view of an electric vacuum cleaner, FIG. 2 is an exploded perspective view of the electric vacuum cleaner, FIG. 3 is an exploded perspective view of a main body case, and FIG. FIG. 5 is an exploded perspective view of the dust case, FIG. 5 is an exploded perspective view of the dust case lid, FIG. 6 is an exploded perspective view of the dust collecting filter unit, and FIG. 7 is a state in which the first fine dust collecting filter is taken out. Fig. 8 and Fig. 8 show a state in which the dust collecting filter unit is removed and dust is discarded from the dust case, Fig. 9 shows a state in which the first fine dust collecting filter is attached to the dust case, and Fig. 10 shows the dust case. Fig. 11 shows the initial state of taking out the first fine dust collecting filter from Fig. 11, Fig. 11 is an enlarged rear view of the coarse dust collecting filter, and Fig. 12 shows the relationship between the coarse dust collecting filter and the first fine collecting filter. Shows the dust removal state of the fine dust collection filter , FIG. 13 is a diagram showing a state in which a dust air stream flows into the first fine-grain dust collecting filter, FIG. 14 is a diagram showing the dust collecting performance characteristics of the first fine-grain dust collecting filter, and FIG. 15 is a first fine-grain dust collecting filter. It is a figure which shows the dust collection performance characteristic at the time of combining a filter and a 2nd fine dust collection filter. 1 ... Main body case, 2 ... Dust case, 19 ... Paper bag filter (first fine dust collecting filter), 36 ... Rotation support plate (filter support body), 40 ... Insertion groove part (receiving part), 43 ... Lid body, 65
… Bag, 66… Mounting plate (supporting plate), 107… Second fine dust collecting filter.

Claims (1)

[Claims] 1. A dust-collecting chamber formed on the upstream side of a cleaner body, a bag-shaped disposable paper bag filter that is provided in the dust-collecting chamber and has a support plate, and the paper-bag filter is taken in and out. And a cover body having a suction port provided in the cleaner body so as to cover the opening, the filter inlet / outlet opening being a larger opening than the outer periphery of the support plate. A seal packing for the suction port, which is provided on the outer peripheral portion of the suction port of the body and is in contact with the supporting plate so as to maintain airtightness, and is provided so as to be rotatable and projectable outward from the opening, and The filter support plate is detachably attached, and the outer periphery is smaller than the opening of the opening, and the filter for holding the paper bag filter in the dust collection chamber. Vacuum cleaner and having a recess for fitting the filter support plate provided on the lifting member.