JPS6354375B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is an electric appliance equipped with a two-stage dust collector consisting of a non-reusable bag-shaped paper filter that discards all collected dust and a non-woven fabric that is continuously used. Regarding a dustproof device for a vacuum cleaner.

[Conventional technology and its problems]

Conventionally, there have been vacuum cleaners equipped with a dust collection bag, as described in Japanese Utility Model Application Publication No. 51-79161, which were equipped with a second dust collection filter on the downstream side.
No particular consideration was given to dust removal by this second filter.

The amount of dust collected by this second dust collection filter is
The amount of dust collected by the dust collection filter is considerably smaller. However, even though the amount of dust adhering is small, the suction capacity is reduced due to this adhesion, so even if the first dust collection filter is replaced with a new one, the suction capacity of the vacuum cleaner as a whole will not be completely restored. No. Using it as it is can be said to be using it under bad conditions.

Further, the first dust collecting filter is replaced one after another with a new one, but since the second dust collecting filter is continuously used, attached dust accumulates, and the suction capacity decreases more and more. The drawback was that even if the first dust collection filter was replaced with a new one, the suction capacity did not recover much.

An object of the present invention is to completely restore the suction capacity of the entire vacuum cleaner by removing dust from the second dust collection filter made of non-woven fabric when replacing the disposable first dust collection filter, and to remove dust from the second dust collection filter in a timely manner. Electricity that removes dust from the dust collection filter and indirectly vibrates the first dust collection filter to remove dust, thereby preventing damage to the first dust collection filter and at the same time restoring the dust collection ability of both filters. It is possible to provide a vacuum cleaner.

[Means for solving problems]

In order to achieve the above object, the present invention provides a bag-shaped first dust collection filter that has air permeability and flexibility and is disposable while storing collected dust; and a second dust collecting filter made of a non-woven fabric located on the downstream side of the dust collecting filter and collecting fine dust that has passed through the dust collecting filter, and removing dust from the first dust collecting filter and the second dust collecting filter. In the vacuum cleaner provided with the apparatus, a filter support substrate is provided downstream of the second dust collecting filter and integrated with a second dust collecting filter frame supporting the second dust collecting filter, A dust remover that contacts the back surface of the second dust collecting filter and a manual handle for the dust remover that operates the dust remover are supported on the filter support substrate, and the dust remover manual handle that is in contact with the downstream outer surface of the first dust collecting filter is supported. A first dust collecting filter support frame having a coarse filter to be held is attached to the second dust collecting filter frame, a receiving protrusion is attached to the first dust collecting filter supporting frame, and a striking rod is used to strike the receiving protrusion. and a cam body that periodically flicks the striking rod is provided with the second cam body.
The dust collecting filter frame is rotatably provided, and an interlocking mechanism is provided to transmit the rotational force of the manual handle for the dust remover or the cord winding device of the electric blower to the cam body in order to simultaneously operate the dust remover and the striking rod. It is something that

[Effect]

When the dust remover and cam body rotate due to the rotation of the manual handle for the dust remover or the cord winding device of the electric blower, the striking rod hits the receiving protrusion, and the first dust collecting filter support frame vibrates and comes into contact with it. Since the first dust collecting filter is continuously struck from the outside, the dust adhering to its inner surface is removed, while the dust remover rubs the back of the second dust collecting filter to remove the dust from the second dust collecting filter. Since dust is removed from the filter, the overall dust collection capacity is restored. Further, since the first dust collecting filter is removed while being held by the coarse filter of the filter support frame, it will not be damaged. Further, when the first dust collecting filter is replaced, dust can also be removed from the second dust collecting filter alone, so that the suction capacity of the vacuum cleaner can be completely restored.

〔Example〕

An embodiment of the present invention will be described below based on the drawings.

This electric vacuum cleaner is composed of a main body case 1 and a dust case 2.

The main body case 1 and the dust case 2 are detachably connected as shown in FIG. This combination is
As shown in FIGS. 4 and 5, insert the hook 4 provided at the bottom of the dust case 2 into the receiving groove 3 provided at the bottom of the main body case 1, and then
Insert the rear side of the board 6 of the handle 5 provided on the top of the main body case 1 into the handle board receiving recess 7 of the main body case 1, and insert the engaging claw 9 of the clamp 8 provided on the top of the main body case 1.
This is done by engaging the base plate 6 of the handle 5.

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

The main body case is composed of a left main case part and a right main case part, which are divided into left and right parts with a vertical dividing plane.

As shown in Fig. 4, the main body case has a front wall 1.
A communication port 13 is provided at 2, and an exhaust port 15 is provided at the rear wall 14. Further, a partition plate 18 separates the central electric blower storage chamber from the lower cord winding device storage chamber. Above the electric blower storage chamber is the first paper bag.
A surplus filter storage chamber 20 is provided to store surplus parts of the dust collection filter 19. A partition plate 21 separates the spare filter storage room 20 and the electric blower storage room.
It is separated by.

Note that 22 is a lid of the spare filter storage chamber 20, 23 is a handle hole of the lid, and 27 is an indicator cover.

The cord winding device 11 has a cord reel 31 that winds up the cord 30. A toothed portion 32 is formed on the outer periphery of this cord reel 31, and this toothed 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.

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

Next, the configuration of the dust case 2 will be explained.
The dust case 2 has a cylindrical shape, as shown in FIGS. 4 and 5.

A first dust collecting filter opening is formed on the front side of the dust case 2 to insert and take out the first dust collecting filter 19 of the paper bag. A filter support plate 36 that can be opened and closed is provided in this first dust collection filter opening. This filter support plate 3
6 is rotatably supported by a support shaft 37 provided at the bottom of the first dust collection filter opening, and this support shaft 37
The support plate 36 can be rotated forward using the support plate 36 as a fulcrum.

Since the length of the filter support plate 36 is approximately half the height of the first dust collection filter opening, when the filter support plate 36 is closed, the lower half of the first dust collection filter opening is closed.

A recess 38 extending to the upper end is formed on the surface of the filter support plate 36, and step-shaped receiving parts 39 for receiving part of the first dust collecting filter 19 are formed at the left and right upper ends of the recess 38.

Further, above the first dust collecting filter opening, a step-shaped receiving part 40 for receiving a part of the first dust collecting filter 19 is also formed.

The dust case lid 43 closes the opening for the first dust collecting filter from the outside of the filter support plate 36, and is rotatably supported at the bottom of the dust case 2 with a support shaft 44. The lid body 43 can be rotated forward using the shaft 44 as a fulcrum.

This dust case lid body 43 has a hose connection port 45 into which a suction hose (not shown) is inserted, and a clamp 46.

The clamp 46 is provided with an engaging claw 47 that engages with and disengages from an engaging portion 48 provided on the dust case 2 . The first dust filter opening of the dust case 2 is opened by engaging the engaging claw 47 of the clamp 46 with the engaging portion 48.
It is closed with a dust case lid 43.

The main body case 1 is detachably connected to the rear side of the dust case 2. A joint side opening is provided on the rear side of the dust case 2, and a dust collection filter unit 49, which will be described in detail later, is inserted into and taken out of the dust case 2 through this joint side opening.

The dust case 2 has a plurality of filter holding ribs 50 on its inner wall surface that hold the first dust collecting filter 19 from the outer periphery. This filter holding rib 50
extends from the inner part of the joint-side opening toward the first dust-collecting filter opening.

Further, between the filter holding ribs 50, filter drawer guide ribs 50' extending in the same direction as the ribs 50 are provided closer to the opening for the first dust collecting filter. This filter drawer guide rib 50' is inclined to be higher toward the first dust collecting filter opening side.

A top plate 55 is formed on the inside upper part of the dust case 2, and an insertion portion 56 into which the board 6 of the handle 5 is inserted is provided above the top plate 55.

Next, the configuration of the first dust collection filter 19 of the paper bag will be described. As shown in FIG. 5, FIG. 8, and FIG. 9, this first dust collection filter 19 has a bag-like body 65
and a support plate 66. Bag-like body 65
is made of thin, breathable, flexible paper. The support plate 66 is made of hard paper such as cardboard. The support plate 66 and the bag-shaped body 65 are bonded together with an adhesive.

The support plate 66 has a dust suction port 67 and a cover portion 68 . The cover portion 68 can be easily bent along a bending line 69 formed on one side of the support plate 66. Two cut lines 70 are provided at the tip of the cover lid part 68. The engagement piece 71 formed by both the cut lines 70 is relatively easy to bend due to the cut lines 70. This support plate 66 is easily formed by punching out a single plate.

The cover lid part 68 is folded and attached to the support plate 6.
6, the dust suction port 67 is closed. In order to maintain the cover body 68 in this state,
The engaging piece 71 is slightly bent and engaged with the inner edge of the dust suction port 67.

Next, the dust case 2 of the first dust collection filter 19
This section explains how to install it.

Open the cover 68 of the first dust collection filter 19, insert the cover 68 into the recess 38 of the filter support plate 36, and insert the bag-like body 65 into the dust case 2, as shown in FIG. By fitting the upper and lower parts of the support plate 66 into the receiving parts 39 and 40, the first dust collecting filter 19 is held on the first dust collecting filter opening side of the dust case 2.

Thereafter, by closing the dust case lid 43, the vacuum cleaner is ready for use.

In this way, the first dust collection filter 19 is installed by attaching the support plate 6 to the receiving parts 39 and 40 of the dust case 2.
This can be easily done by fitting 6.

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

A connection port portion of the deflection suction port 78 is connected to the inner end of the hose connection port 45 via a seal packing 85. A check valve 86 is integrally formed in the seal packing 85 . This check valve 8
6 is made of an elastic material such as rubber or soft vinyl chloride. The non-return valve 86 is movable around the connecting portion with the seal packing 85.

The non-return valve 86 is located inside the deflection suction port 78 and is automatically opened by the force of the airflow passing through the hose connection port 45, and is automatically closed when there is no airflow.

A lid seal packing 90 is attached to the outer periphery of the inner cover plate 75. An annular tongue piece 91 is formed on the inner surface of the lid seal packing 90. When the dust case lid 43 is closed, this tongue piece 91 is attached to the first part of the dust case 2.
It is joined to the outer peripheral side end surface of the dust collection filter opening to maintain airtightness between the dust case 2 and the dust case lid 43.

A suction port seal packing 92 is attached to the outer periphery of the deflection suction port 78. This suction port seal packing 92 is formed with a locking protrusion 93, and by inserting this locking projection 93 into the locking hole of the inner cover plate 75, the suction port seal packing 92 is moved to the inner side. It is attached to the cover plate 75. Further, the suction seal packing 92 is integrally formed with the lid seal packing 90 with a connecting portion 94.

The suction port seal packing 92 comes into contact with the support plate 66 of the first dust collecting filter 19 when the dust case lid 43 is closed, thereby creating an airtight seal between the support plate 66 and the inner cover plate 75 side. keep it.

When the dust case lid 43 is closed, the deflection suction port 78 faces into the bag-like body 65 through the dust suction port 67 of the support plate 66.

Next, a dust removal device according to an embodiment of the present invention will be described.

As shown in FIGS. 1 and 4, the dust filter unit 49 mainly includes a first dust filter support frame 100, a second dust filter frame 102, a filter support substrate 103, and a holding seal packing 104. It consists of

The first dust collecting filter support frame 100 has a flat coarse filter 105 on its front surface, and auxiliary coarse filters 106 on its side and top surfaces.

Both filters 105 and 106 are made of threads of nylon, polyethylene, polypropylene, etc. knitted in a mesh shape, and the size of the ventilation holes in these is sufficiently larger than that of the first dust collecting filter 19. be. That is, the first dust collecting filter 19 can collect fine dust such as sand, whereas both filters 105 and 106 allow fine dust to pass through.

The second dust collecting filter frame 102 is provided with a second dust collecting filter 107 made of a nonwoven fabric formed into a wave shape. The size of the ventilation openings of the second dust collecting filter 107 is formed to be approximately the same as that of the first dust collecting filter 19.

In this way, the second dust collecting filter 107 made of non-woven fabric is arranged downstream of the first dust collecting filter 19 of the paper bag, so that the dust not collected by the first dust collecting filter 19 is removed from the second dust collecting filter 107. It can be collected by the dust filter 107, and can be collected by the exhaust port 1 of the main body case 1.
No more fine dust will blow out than 5.

The filter support board 103 has a dust remover gear body 108 on the front side and a dust remover manual handle 10 on the rear side.
9 are rotatably supported. 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 this screw 111 is screwed into the 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 to the filter support substrate 103.

The rear side of the second dust collecting filter frame 102 and the front side of the filter support substrate 103 are aligned, and a holding seal packing 104 is fitted on the outer periphery of both to form a set, and the first dust collecting filter supporting frame The dust collecting filter unit 49 is constructed by covering and attaching the body 100 from the second dust collecting filter 107 side.

When this dust collecting filter unit 49 is fitted into the dust case 2, the outer periphery of the holding seal packing 104 is hermetically joined to the inner wall surface of the dust case 2.

The tip of the dust remover 110 is connected to the second dust collection filter 1
Since the dust remover 110 is in contact with the rear surface (rear surface) of the dust remover 110, by turning the dust remover manual handle 109, the back surface is rubbed by the tip of the dust remover 110. This rubbing causes the second dust collecting filter 107 to vibrate, and the fine dust adhering to the front surface (surface) of the second dust collecting filter 107 is removed.

A percussion vibration type dust removal device is provided inside the dust collection filter support frame 100.

That is, Figures 1, 2, 3 and 4
As shown in the figure, a support boss portion 121 is provided on the rear surface (back surface) of a non-ventilated portion 120 provided approximately in the center of the coarse filter 105. A striking rod 122 formed of a spring material on this support boss portion 121
is installed. This installation is for striking rod 1
Screw 1 screwing one end of 22 into support boss portion 121
23 and seat plate 124.

A receiving protrusion 125 facing the free end side, which is the other end of the striking rod 122, is integrally formed on the back side of the coarse filter 105. This receiving protrusion 125
A vibration transmitting body 126 is attached to the coarse filter 105 so as to extend from the base to the left and right.

When hitting the receiving protrusion 125 with the striking rod 122,
The vibration propagates well to the entire coarse filter 105 of the first dust collecting filter support frame via the vibration transmitting body 126.

In addition, since the striking rod 122 strikes the receiving protrusion 125 closer to the tip than the base, the coarse filter 1
05 vibrates like a seesaw around the receiving protrusion 125 as shown in FIG. Due to this seesaw-like vibration, the first dust collection filter 19 connected to the surface of the coarse filter 105 is continuously struck from the outside, so that the dust adhering to the inside of the filter 19 is removed and collected. Ability will be restored.

A bearing 130 provided above the second dust filter frame 102 rotatably supports a cam body 132 via a seal packing 131. Bearing 1
An idler gear body 133, a clutch ring 134, a spring 135, and a connecting cylinder body 136 are attached to the back side of the cam body 130, and these are attached to the screw 1 which is screwed into the cam body 132.
It is fixed by 37.

The cam body 132 is rotated by turning the idler gear body 133. However, the rotation transmitted from the idle gear body 133 to the cam body 132 is only one rotation due to the clutch ring 134.

The cam body 132 is located in contact with the free end of the striking rod 122, and the teeth of the idler gear body 133 are meshed with the teeth of the dust removal gear body 108, so that the dust remover manual handle By turning 109, the dust removal gear body 108 and the idle gear 133
The cam body 132 rotates via. This cam body 1
32, the free end of the striking rod 122 is periodically repelled, so that the striking rod 12
2 strikes the receiving protrusion 125 periodically.

The bearing 140 of the filter support board 103 rotatably supports a passive coupling 142 via a spring 141, and the passive coupling 142 is prevented from coming off by a screw 144 screwed into the bearing 140 via a seat plate 143.

The passive coupling ring 142 is formed with a toothed portion, and this toothed portion meshes with the toothed portion of the dust removal gear body 108. Also, the passive coupling 14
2 engages with the driving coupling ring 34 by coupling the dust case 2 to the main body case 1, and both coupling rings 34 and 142 are connected.

Through this connection, the rotational force of the cord reel 31 of the cord winding device 11 is transmitted to the dust removal gear body 108.

Therefore, by rotating the manual handle for the dust remover or the cord winding device of the electric blower, the first
Since the dust collection filter and the second dust collection filter made of non-woven fabric can be removed at the same time, the dust collection ability can be further improved.

Note that the unidirectional rotation of the cam body 132 is performed using the code 30.
The cam body 132 does not rotate when the cord reel 31 rotates when the cord 30 is wound up. This contributes to downsizing the unwinding mainspring spring of the cord winding device 11 that rotates the cord reel 31.

Here, a tooth portion 32 formed on the outer periphery of the cord reel, an intermediate gear 33, a drive coupling 34, a dust remover gear body 108, an idler gear body 133, a clutch ring 134, springs 135, 141, and a connecting cylinder body 13
6. The passive coupling 142 constitutes an interlocking mechanism that transmits the rotational force of the dust remover manual handle 109 or the cord winding device 11 of the electric blower to the cam body 132 for simultaneously operating the dust remover 110 and the impact 122. ing.

The above is the configuration of the embodiment of the present invention. Next, the operation based on this configuration will be explained.

When the electric blower 10 is operated, the airflow containing dust passes through the suction hose, the hose connection port 45 and the deflection suction port 78, and flows into the bag-like body 65 of the first dust collection filter 19. Here, coarse dust and fine dust are collected, and air and a small amount of fine dust are collected by the bag-like body 65.
passes through the ventilation hole, and further passes through the coarse filter 105,1.
06 and flows to the second dust collection filter 107 side. Here, the fine dust is collected again, and the air passes through the ventilation hole of the second dust collecting filter 107 and is exhausted from the exhaust port 15 of the main body case 1.

When the first dust collection filter 19 is attached to the dust case 2, the bag-like body 65 is in a folded state, but when air flows into the bag-like body 65, this wind pressure and the bag-like body 65 are folded. The bag-like body 65 inflates due to the static pressure applied to the outer peripheral surface. Since the outer periphery of the swollen bag-shaped body 65 is held down by the coarse dust collection filter 105 and the filter holding rib 50, it does not swell any further and dust collection is performed in this state.

Although the outer periphery of the bag-like body 65 is held down by the first dust collecting filter support frame 100 and the filter holding rib 50 as described above, the air permeability of the bag-like body 65 is not impaired. That is, since the coarse filter 105 of the support frame 100 has sufficient air permeability and there is a ventilation path between each of the filter holding ribs 50, the airflow to the outer periphery of the bag-shaped body 65 is not blocked.

The dust inside the bag-shaped body 65 is collected using a coarse filter 105.
Proceed from the part opposite to. As the opposing portions become clogged, most of the airflow passes through the portions opposing the filter holding ribs 50, and then passes through the coarse filters 106 provided on the side and upper sides of the filter support frame 100 to the second concentration. This means that the dust flows to the dust filter 107 side.

In this way, the bag-like body 6 of the first dust collection filter 19
5. Dust collection is carried out.

When the amount of dust adhering to the bag-shaped body 65 and the second dust collecting filter 107 increases and the suction force decreases,
When the cord reel 31 of the cord winding device 11 is rotated or the dust remover manual handle 109 is rotated, the dust remover 110 is activated to remove dust from the second dust collecting filter 107 and the striking rod 122 is rotated. Due to the operation, the bag-shaped body 65
Dust removal will also be carried out.

As described above, dust removal from the bag-like body 65 is carried out by vibrations on the coarse filter 105 side due to the operation of the striking rod 122, so that the bag-like body 65 is not damaged.

That is, since the bag-like body 65 is made of a relatively weak material such as paper, if the outer surface of the bag-like body 65 is directly rubbed with something like the dust remover 110, it will break. However, since dust removal vibration is applied to the bag-shaped body 65 through the coarse filter 105,
An unreasonable force that would break the bag-like body 65 is not applied.

Furthermore, as described above, the first dust collecting filter support frame 100 vibrates like a seesaw around the receiving protrusion 125, so that the bag-like body 65 is bent inward from the outer surface due to this seesaw-like vibration. Since the bag-like body 65 is repeatedly subjected to impact force, the dust adhering to the inner surface of the bag-like body 65 can be effectively peeled off.

Furthermore, a large amount of dust adheres to the part of the bag-shaped body 65 that contacts the first dust collecting filter support frame 100, but since the dust removal vibration is applied to this part, dust removal is carried out effectively and the dust collection capacity is recovered. It contributes a lot.

In this way, by using the first dust collecting filter 19 and the like while repeatedly removing dust in a timely manner, the first dust collecting filter 19 is filled with dust without leaving any extra space.

At this time, the first dust collecting filter 19 filled with dust is removed from the dust case 2, and a new first dust collecting filter 19 is attached.

That is, to remove the first dust collection filter 19 from the paper bag, first remove the clamp 4 as shown in FIG.
6 to open the dust case lid 43, and close the dust suction port 67 with the lid 68 of the first dust collection filter 19, as described above. After that, by pulling the first dust collecting filter 19 outward with the supporting plate 66, the filter supporting plate 36 is opened, so that the first dust collecting filter 19 can be easily pulled out to the outside of the dust case 2. .

When the drawer is pulled out, the dust suction port 67 is closed by the cover 68, so that dust does not spill out from the suction port 67. The first dust collection filter 19 that has been pulled out is thrown away with the dust still stored therein. Further, the first dust collecting filter 19 can be pulled out more easily by the filter pull-out guide rib 50'.

As explained above, the first dust collecting filter 19 can be removed and a new first dust collecting filter 19 can be installed from the opening for the first dust collecting filter on the front side of the dust case 2 using the dust case lid 43. Therefore, it can be carried out independently of the removal of the dust collecting filter unit 49, which is good in terms of ease of handling.

The amount of dust collected by the second dust collection filter 107 in the dust collection filter unit 49 is very small (more than 95% is collected by the first dust collection filter 19). The amount of dust to be disposed of is extremely small compared to replacing the first dust collection filter 19.

Nevertheless, the second dust collection filter 10
The reasons for performing dust removal or throwing away dust in step 7 are as follows.

That is, even if the first dust collecting filter 19 is replaced with a new one, if dust is attached to the second dust collecting filter 107, the suction ability of the vacuum cleaner will not be completely restored. Even though I replaced the first dust collection filter 19 with a new paper bag, there is a problem that the suction performance is inferior, so I removed the dust from the second dust collection filter 107 to restore the suction capacity of the same filter 107. It is necessary to measure it.

Furthermore, when the amount of dust collected on the second dust collection filter 107 side exceeds a certain level, even if dust is removed, the removed dust will rise again significantly, and the suction capacity of the second dust collection filter 107 will soon deteriorate due to dust adhesion. down.
In such a case, the dust collecting filter unit 49 must be removed from the dust case 2 and the dust must be thrown away.

When discarding the dust on the second dust collection filter 107 side or performing maintenance and inspection of the dust collection filter unit 49, the dust collection filter unit 49 is removed from the joint side opening on the rear side of the dust case 2. This can be done regardless of the removal of the dust collecting filter 19, which is good in terms of ease of handling.

The necessity for dust removal by the first and second dust collection filters 19 and 107 will be described in more detail along the graph.

That is, FIGS. 8 and 9 show the relationship between the suction strength of the filters 19 and 107 and the amount of dust collected in comparison with the presence or absence of dust removal.

First, as shown in FIG. 8 (showing the characteristics of only the first dust collecting filter 19), when the first dust collecting filter 19 does not remove dust, the dust collection performance characteristics shown in (A) are shown. That is, as the amount of collected dust increases, the first dust collecting filter 19 becomes increasingly clogged.
The suction strength (suction strength) decreases rapidly, and the suction strength immediately saturates. Let V be the dust collection capacity in this case.

On the other hand, if dust removal from the first dust collection filter 19 is carried out in a timely manner, the dust collection performance characteristic shown in (b) will be exhibited.
In other words, when used while removing dust in a timely manner, the dust adhering to the first dust collecting filter 19 will be removed and clogging will be cleared, and the suction strength will be restored, and the suction strength will increase as the amount of collected dust increases. does not decrease rapidly. Therefore, when the suction strength reaches saturation, the dust collection capacity increases to 2.5 to 3 V, which is 2.5 to 3 times greater than when no dust removal is performed.

Next, as shown in Fig. 9, the dust collection performance characteristics (c) of the entire vacuum cleaner are a combination of the dust collection performance characteristics (d) of the first dust collection filter 19 and the second dust collection performance characteristics (e). Become peace.
Here, for convenience of explanation, it is assumed that dust removal from both filters 19 and 107 is not performed until the suction strength is saturated.

When the suction strength is saturated, when the first dust collection filter 19 is replaced with a new one, the decreased amount b of the suction strength is completely recovered. However, since the amount of suction strength of the whole vacuum cleaner decreased is c, it does not mean that the suction strength as a whole has completely recovered. That is, the amount a of decrease in the suction strength of the second dust collecting filter 107 remains.

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

In this way, in the two-stage structure in which the second dust collection filter 107 is provided downstream of the first dust collection filter 19, it is expected that the suction capacity will be restored by replacing the first fine dust collection filter 19. It is absolutely necessary to remove dust from the second filter 107.

Further, the dust airflow flowing into the bag-like body 65 is deflected downward by the deflection suction port 78, and the flow velocity is thereby attenuated, so that the collision force of the dust airflow against the bag-like body 65 is softened, and the damage to the bag-like body 65 is reduced. Contribute to prevention.

In particular, since the backflow prevention valve 86 made of an elastic material is provided inside the deflection suction port 78, a greater effect of attenuating the dust airflow can be expected.

〔Effect of the invention〕

According to the present invention, since the first dust collecting filter and the second dust collecting filter are provided with a dust removing device that can remove dust at the same time, the dust collecting filter can be cleaned until it is full of dust, and the use of the dust collecting filter is wasted. In addition to this, the suction capacity can be maintained at a good level forever.

In addition, since the dust removal device is integrated with the second dust collection filter, when replacing the dust collection filter, the second dust collection filter can be removed from the vacuum cleaner body and transported to a dust disposal area, where dust removal operations can be performed. Therefore, the dust collection performance after filter replacement can be improved.

Furthermore, since vibrations are transmitted to the dust collecting filter through the coarse filter of the filter support frame, there is no risk of damage, and it can be used satisfactorily. This effectively improves reliability during use.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is an exploded perspective view of a dust collecting filter unit, Fig. 2 is a rear view of the first dust collecting filter support frame, and Fig. 3 is a paper filter and its support. Figure 4 is a vertical cross-sectional view of the vacuum cleaner, Figure 5 is an exploded explanatory diagram of the vacuum cleaner, Figure 6 is a diagram showing how the paper filter is attached to the dust case, and Figure 7 is a diagram showing the position of the vacuum cleaner. FIG. 8 is a diagram showing the dust collection performance characteristics of the paper filter; FIG. 9 is a diagram showing the dust collection performance characteristics when a paper filter and a nonwoven filter are used together. 11... Cord winding device, 19... First dust collecting filter, 100... First dust collecting filter support frame, 102... Second dust collecting filter frame, 103
... Filter support substrate, 105 ... Coarse filter, 107 ... Second dust collection filter, 109 ...
...Manual handle for dust remover, 110...Dust remover, 1
22...Blow rod, 125...Blowing protrusion, 132
...cam body.

Claims (1)

[Claims] 1. A bag-shaped first dust collection filter that has breathability and flexibility and is disposable while storing collected dust; and a bag-shaped first dust collection filter that is located downstream of the first dust collection filter; a second dust collecting filter made of a nonwoven fabric that collects fine dust that has passed through the vacuum cleaner; A filter support board is provided on the downstream side of the dust collection filter and is integrated with a second dust collection filter frame that supports the second dust collection filter, and the filter support board has a back surface of the second dust collection filter. A first dust filter that supports a dust remover that comes into contact with the dust remover and a manual handle for the dust remover that operates the dust remover, and has a coarse filter that is held in contact with an outer surface on the downstream side of the first dust collection filter.
A dust collecting filter support frame is attached to the second dust collecting filter frame, and the first dust collecting filter supporting frame is provided with a receiving projection and a striking rod that strikes the receiving projection, and the striking rod is provided with a receiving projection and a striking rod that strikes the receiving projection. A cam body that flicks periodically is rotatably provided on the second dust collecting filter frame, and in order to operate the dust remover and the striking rod at the same time, the dust remover manual handle or the cord winding device of the electric blower is rotated. A vacuum cleaner characterized by having an interlocking mechanism that transmits force to a cam body.