JPS646779B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a vacuum cleaner in which a dust collection bag is attached to a drawer opening of a dust case using a rotating filter support plate.

[Conventional technology]

For this type of vacuum cleaner, for example, as shown in Japanese Patent Publication No. 31-7784, a rubber socket is installed on a rotating filter support plate, and this socket is crushed to open the dust collection bag. A configuration is known in which the dust filter is inserted into a dust suction port provided on a support plate.

[Problem that the invention seeks to solve]

In the above conventional example, when attaching a dust collection bag to the drawer opening of the dust case, it is necessary to crush the receiver and insert it into the dust suction opening of the dust collection bag. When disposing of the bag, it is necessary to remove the receiver by crushing it and removing it from the dust suction port of the dust collection bag.
It is extremely difficult to handle. Moreover, there is a drawback that dust spills from the dust suction port of the dust collection bag when the dust collection bag is removed.

It is an object of the present invention to easily attach a dust collection bag to a filter support plate, and
To provide a vacuum cleaner in which a dust collection bag can be easily removed from a filter support plate without spilling dust.

[Means for solving problems]

The above object is to provide a bag-like body having air permeability and flexibility, a flat support plate which is the opening plate of the bag-like body and has a dust suction port, and is formed integrally with the support plate. , a dust collection bag equipped with a flat cover that can block the dust suction port;
In a vacuum cleaner that is attached to a drawer opening of a dust case using a flat filter support plate that rotates at the drawer opening, the cover lid fits onto the surface of the filter support plate. By providing a recessed portion, providing receiving portions at the left and right ends of the recessed portion to receive the support plate of the dust collection bag, and providing a recessed portion in the recessed portion into which the fingertips can be inserted and the lid body can be grasped. , achieved.

[Effect]

At the same time, the cover lid, which is integrated with the support plate of the dust collection bag, is placed and fitted into the recess of the filter support plate that rotates at the drawer opening of the dust case. When the filter is fitted into the receivers provided at the left and right ends of the recess, the filter support plate is held between the support plate of the dust collection bag and the bag-shaped body of the dust collection bag, and the filter is inserted into the drawer opening of the dust case. Installation of the dust collection bag is completed.

To remove the dust collection bag from the drawer opening of the dust case, fold the lid to block the dust suction port, then pull the support plate of the dust collection bag to release the support plate. As the bag leaves the filter support plate, the filter support plate rotates and the bag-like body of the dust collection bag is pulled out from the dust case.

When the bag-like body of the dust collection bag is filled with dust, the bag-like body expands to its full capacity, so that the filter support plate is moved between the bag-like body of the dust collection bag, the support plate of the dust collection bag, and the bag-like body of the dust collection bag. Since the lid is strongly held between the lid and the lid, the lid comes into close contact with the recess of the filter support plate, making it difficult to grip the lid with your fingertips. In this case, by inserting the fingertips into the recessed portions, the capping lid can be grasped with the fingertips, and the operation of folding the capping lid to close the dust suction port can be smoothly performed.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

This 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 connection is performed as shown in Figures 1 and 2.
Insert the hook 4 provided at the bottom of the dust case 2 into the receiving groove 3 provided at the bottom of the dust case 2, and insert the rear side of the board 6 of the handle 5 provided at the top of the dust case 2 into the handle board holder of the main body case 1. This is done by inserting into the recess 7 and engaging the engaging claw 9 of the clamp 8 provided on the upper part of the main body case 1 with 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.

As shown in FIG. 3, the main body case 1 is composed of a left main case part 1a and a right main case part 1b, which are divided into left and right parts with a vertical dividing plane. The left and right main body case parts 1a and 1b are fixed with screws (not shown).

The left and right main body case parts 1a and 1b are provided with a communication port 13 in the front wall 12 and an exhaust port 15 in the rear wall 14. A central electric blower storage chamber 16 and a lower cord winding device storage chamber 17 are separated by a partition plate 18. A spare filter storage chamber 20 is provided above the electric blower storage chamber 16 to store a spare part of a dust collection bag (hereinafter referred to as a first fine dust collection filter 19), which will be described in detail later. The spare filter storage chamber 20 and the electric blower storage chamber 16 are separated by a partition plate 21.
It is separated by.

The partition plates 18 and 21 extend perpendicularly to the dividing plane of the main case 1 and inward of the left main cases 1aa and 1b, respectively.

The spare filter storage chamber 20 has an opening in the outer wall surface of the right main body case portion 1b. The spare first fine dust collection filter 19 is taken in and out of the spare filter storage chamber 20 through this opening. Normally, a removable lid 22 is attached to the opening to close the opening. This lid 22 has a handle hole 23 and a locking pawl 24, and the lid 22 is removably locked in the opening by the pawl 24.

When using this vacuum cleaner, the sound generated from the electric blower 10 leaks to the outside of the main body case 1, but
Since the inside upper side of the main body case 1 has a double partition structure with the spare filter storage chamber 20, it is possible to reduce the sound leaking to the outside, and it is possible to reduce the noise. Spare filter storage chamber 20, electric blower storage chamber 16, and cord winding device storage chamber 17
can be formed using a mold that is punched out on the dividing surface side of the main body case 1. If the spare filter storage chamber 20 were to be formed vertically on the outer wall of the main body case 1, the mold for molding would be complicated and the workability of molding would be poor.

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

The negative pressure communication port 26 is connected to the spare filter storage chamber 20.
Since the opening is in the same direction as the opening, the mold for molding can be easily removed.

The iodine winding device 11 has a cord reel 31 that winds up the cord 30. This code reel 3
A tooth portion 32 is formed on the outer periphery of the tooth portion 1 . Teeth 3
2 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 this intermediate gear 33, and this drive coupling 34 is attached to the front wall 10.
external surface is exposed.

This drive coupling ring 34 is connected to the dust case 2
It is connected to the dust removal device side of the dust collection filter unit, which will be described later, provided on the side.

Next, the configuration of the dust case 2 will be explained. The dust case 2 has a cylindrical shape, as shown in FIGS. 1, 2, and 4.

On the front side of the dust case 2, a drawer opening 2a (hereinafter referred to as
A first fine dust collection filter opening) is formed. This first fine dust collection filter opening 2a has a filter support plate 36 that can be opened and closed.
is provided. This filter support plate 36
is rotatably supported by a support shaft 37 provided at the bottom of the first fine dust collection filter opening 2a, and the support plate 36 can be rotated forward using this support shaft 37 as a fulcrum. . Projections 41 projecting outward are formed on the upper portions of both sides of the filter support plate 36, and partially contact the first fine dust collecting filter opening 2a to moderate rotation. .

The length of the filter support plate 36 is approximately half the height of the opening for the first fine dust collection filter, so when the filter support plate 36 is closed, the lower half of the opening 2a for the first fine dust collection filter is blocked. It will be done.

A recess 38 extending to the upper end is formed on the surface of the filter support plate 36, and stepped receiving parts 39 for receiving a portion of the first fine dust collecting filter 19 are formed at the left and right upper ends of the recess 38. A recessed part 42 is formed in the center of the lower part of the recessed part 38, and a plurality of slightly raised protrusions 39a are formed in the receiving part 39, protruding toward the upper end.

Above the first fine dust collecting filter opening 2a, a step-shaped receiving part 40 that similarly receives a part of the first fine dust collecting filter 19 is formed.

The functions of these receiving parts 39, 40 and recessed part 38 will be explained in detail later.

The dust case lid 43 closes the first fine dust collection filter opening 2a 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. This support shaft 4
4 as a fulcrum, the lid body 43 can be rotated so as to be tilted forward.

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 fine dust filter opening 2 a 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 .

The structure of the inner surface of the dust case lid 43 will be described in detail later.

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 fine dust collecting filter 19 from the outer periphery. This filter holding rib 50 is arranged in a first direction from the inner part of the joint side opening.
It extends toward the fine dust collection filter opening 2a.

According to Figures 1, 2, 4 and 17,
The filter holding rib 50 will be explained in detail. The upper and lower filter holding ribs 50 are
A cylindrical boss portion 50a is formed in the middle in the height direction, and extends to a position where it comes into contact with the front surface of a coarse dust collecting filter frame 100, which will be described later, and the side surface side faces an auxiliary coarse filter 106, which will be described later. and a plurality of ones approximately in the center on the side face extend to a position where they come into contact with a holding seal packing 104, which will be described later. The height of the filter holding rib 50 is the same as that of the opening 2 for the first fine dust collection filter.
It has a height higher than the height of a and is sloped so as to become lower toward the end, but among the filter holding ribs 50 on the side surface, the plurality of ribs located approximately in the center are coarse-grained ribs, which will be described later. It is formed so as to come into contact with the side surface of the dust filter frame 100, and the other parts are formed at a height such that there is a gap with the auxiliary coarse dust collecting filter 106. The reason why the cylindrical boss 50a is formed in the middle of the height direction of the filter holding ribs 50 on the upper and lower sides is that when the dust case 2 is taken out from the molding die, the filter holding ribs 50 are pushed out by the extrusion pins. In addition, the gap between each of the lower filter holding ribs 50 is narrowed to reduce the sinking of the lower surface of the bag-like body 65 where dust accumulates, and the bag-like body 65
This improves the ease with which the bag can be pulled out and prevents the bag-like body 65 from being damaged. The height of the plurality of approximately central portions of the filter holding ribs 50 on the side surface is formed to be in contact with the side surface of the coarse dust collecting filter frame 100 to prevent the dust case 2 from deforming due to negative pressure. It is. That is, the bag-like body 6
If the dust case 5 is used in an abnormally clogged state, an abnormally high negative pressure will be applied to the inside of the dust case 2, causing it to dent inward, and in a high-temperature environment to exceed the temperature limit of the thermoplastic resin dust case 2, resulting in deformation. Since it will not restore its original shape, a coarse dust collecting filter frame 100 with high rigidity is stretched through the filter holding ribs 50.

Between the filter holding ribs 50, the same ribs 50
Filter drawer guide rib 5 extending in the same direction as
0' is provided closer to the first fine dust collection filter opening 2a side. This filter drawer guide rib 50' is inclined to be higher toward the first fine dust collecting filter opening 2a side.

A top plate 55 is formed on the inner upper part 1 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.

The handle 5 is constructed by combining handle pieces 5a and 5b and tightening them together with a screw 57. The screw seat 58 of the handle 5 is connected to the handle pieces 5a, 5.
It is fitted into the receiving portion 59 of b. Attachment of the screw seat 58 to the receiving part 59 is performed using the handle piece 5a,
This is done during the assembly process of joining 5b.

After the handle 5 is inserted into the insertion portion 56,
It is fixed to the dust case 2 by screws 60 that pass through the top plate 55 from inside the dust case 2 and are screwed into the screw seats 58. As shown in FIG. 4, this screw seat 58 is located in the range of the grip portion of the handle 5, that is, approximately on the center of gravity when carrying this vacuum cleaner. Part 59
It can be fixed with a single screw because no unreasonable load is applied to it.

Next, the configuration of the first fine dust collection 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-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-like body 65 are
Bonded with adhesive.

The support plate 66 has a dust suction port 67 and a cover 68 . The cover 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 lid 68. An engagement piece 71 formed by this double-sided wrap-around line 70
is relatively easy to bend due to the score line 70. This support plate 66 is easily formed by punching out a single plate.

The cover lid body 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.

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

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

Closure lid body 68 of first fine dust collection filter 19
9, insert the cover 68 into the recess 38 of the filter support plate 36, and insert the bag 65 into the dust case 2.
By fitting the upper and lower parts of the support plate 66 into the receiving parts 39 and 40, the first fine dust collecting filter 19 is held on the side of the first fine dust collecting filter opening 2a of the dust case 2.

Thereafter, by closing the dust case lid 43, the vacuum cleaner is ready for use. Dimension m between the upper end of the receiving part 40 and the upper end of the slightly raised protrusion 42
and the dimension n of the support plate 66 are formed so that m≦n as shown in FIG. It is possible to absorb variations in the fitting dimensions of the support plate 66, and while the lid body 43 is closed, the support plate 66 is moved to the receiving portions 39, 4 due to slight movement of the bag-like body 65.
This prevents the support plate 66 from being used while being detached from the 0. Furthermore, since the entire lower end of the support plate 66 is partially and slightly bitten without being pressed, the support plate 66 does not warp and is attached to the suction port sealing pad. king 9
2, the airtightness of the abutting part with the first fine dust collecting filter 19 is stabilized, dust leakage is eliminated, and the dust collection performance is stabilized.
does not impede movement.

As described above, the opening 2a for the first fine dust collecting filter and the protrusion 41 are brought into partial contact to moderate the opening/closing operation of the filter support plate 36, so that the dust case lid 43 can be closed. During this time, the filter support plate 36 is moved by a slight movement of the bag-shaped body 65.
It is easy to handle as it does not fall forward.

In this way, the first fine dust collecting filter 19 can be easily and reliably attached by fitting the support plate 66 into the receiving parts 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, an inner cover plate 7 is provided inside the dust case lid 43.
5 is provided. This inner cover plate 75 is
It is fixed to the dust case lid 43 by a screw 77 that is screwed into a screw seat 76.

A deflection suction port 78 is provided above the center of the inner cover plate 75 . This deflection suction port 78
The discharge part of the guide 79 is directed downward, and a ventilation hole 80 is provided in the curved part 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 86 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, 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.

The functions of the deflection suction port 78, the vent hole 80, and the non-return valve 86 will be described in detail later.

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 joins to the outer circumferential end surface of the first fine dust collection filter opening of the dust case 2, and maintains airtightness between the dust case 2 and the dust case lid 43. keep.

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 projection 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 closed. , attached to the inner cover plate 75. Suction seal packing 92
The connecting portion 9 is attached to the lid seal packing 90.
4 and is integrally formed. The inner diameter D of the dust suction port 67 of the support plate 66 is larger than the inner diameter d of the suction seal packing 92.

The suction port seal packing 92 comes into contact with the support plate 66 of the first fine dust collection filter 35 when the dust case lid 43 is closed, thereby preventing the connection between the support plate 66 and the inner cover plate 75 side. Keep it airtight.

When the dust case lid 43 is still 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, the structure of the dust collecting filter unit 49 will be described.

As shown in FIGS. 1 and 6, the dust collecting filter unit 49 mainly includes a coarse dust collecting filter frame 100 and a second fine dust collecting filter frame 10.
2, a filter support substrate 103, and a holding seal packing 104.

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

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

The second fine dust collecting filter frame 102 includes a second fine dust collecting filter 10 formed of a wavy nonwoven fabric.
7 is provided. The size of the ventilation openings of the second fine dust collecting filter 107 is formed to be almost 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 downstream of the first fine dust collecting filter 19, the second fine dust collecting filter 107 is arranged in two stages, so that the first fine dust collecting filter 19
The dust that is not collected by the second fine dust collection filter 107 can be collected by the second fine dust collection filter 107, and
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 1 on the rear side.
09 are rotatably supported. A dust remover 110 formed of an elastic body on the front surface of the dust remover gear body 108 is fixed with a screw 111.
By screwing them into the dust remover manual handle 109, the dust remover 110, the dust remover gear body 108, and the dust remover manual handle 109 are attached to the filter support substrate 103 together.

The rear side of the second fine dust collecting filter frame 102 and the front side of the filter support substrate 103 are aligned, a retaining seal packing 104 is fitted on the outer periphery of both, and the two are made into a pair, and the coarse dust collecting filter frame is attached to the rear side of the second fine dust collecting filter frame 102. The dust collecting filter unit 49 is constructed by covering and attaching the second fine dust collecting filter 100 from the second fine 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.

Since the tip of the dust remover 110 is in contact with the rear surface (back surface) of the second fine dust collection filter 107,
By turning the dust remover manual handle 109,
The back surface is rubbed with the tip of the dust remover 110 so as to be repelled. Due to this rubbing, the second fine dust collecting filter 107 vibrates, and the second fine dust collection filter 107 vibrates.
Fine dust adhering to the front (surface) of 07 is removed.

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

That is, as shown in FIGS. 1, 6, 11, and 12, the coarse dust collection filter 105
A support boss portion 121 is provided on the rear surface (back surface) of the air-impermeable portion 120 provided approximately in the center. A striking rod 122 made of a spring material is attached to this support boss portion 121. This installation involves attaching one end of the striking rod 122 to the supporting boss portion 12.
1 and a seat plate 124.

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

When hitting the receiving protrusion 125 with the striking rod 122,
The coarse dust filter 105 vibrates. This vibration is transmitted to the entire coarse dust collection filter 105 by the vibration transmitter 126.

Since the striking rod 122 strikes the receiving protrusion 125 closer to the tip than the base, the coarse dust collection filter 105 hits the receiving protrusion 1 as shown in FIG.
It vibrates like a seesaw with 25 as the center. This seesaw-like vibration causes the coarse dust collection filter 1 to
Since the first fine dust collection filter 19 connected to the surface of the filter 05 is continuously struck from the outside, the dust adhering to the inside of the filter 19 is removed.

A bearing 130 provided above the second fine dust filter frame 102 rotatably supports a cam body 132 via a seal packing 131. An idle gear body 133, a clutch ring 134, a spring 135, and a connecting cylinder body 136 are attached to the back side of the bearing 130, and these are fixed by a screw 137 that is screwed into the cam body 132.

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 connected to 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 removal manual By turning the handle 109, the cam body 132 is rotated via the dust removal gear body 108. As the cam body 132 rotates, the free end of the striking rod 122 is repelled, so that the striking rod 122 strikes the receiving protrusion 125 as described above.

The bearing 140 of the filter support board 103 rotatably supports the passive coupling 142 via a spring 141, and the passive coupling 142 is prevented from coming off by a screw 144 that is screwed into the bearing 140 via the 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. Further, the passive coupling ring 142 engages with the driving coupling ring 34 by coupling the dust case 2 to the main body case 1, and the two coupling rings 34, 142 are coupled. Through this connection, the rotational force of the cord reel 31 of the cord winding device 11 is transmitted to the dust removal device provided in the dust collection filter.

The unidirectional 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, so when the cord reel 31 rotates when the cord 30 is wound up, the cam body 13
2 does not rotate. This contributes to downsizing the unwinding mainspring spring of the cord winding device 11 that rotates the cord reel 31.

The above description has been made mainly from the viewpoint of the configuration of this vacuum cleaner shown in one embodiment. 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 fine 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 6.
The air passes through the ventilation holes No. 5, further passes through the coarse dust collection filters 105 and 106, and flows to the second fine dust collection filter 107 side. Here, the fine dust is re-collected, and the air passes through the ventilation hole of the second fine dust collection filter 107 and is exhausted from the exhaust port 15 of the main body case 1.

When the first fine 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, the wind pressure and the bag-like body 65 The bag-like body 65 inflates due to the static pressure applied to the outer circumferential surface of the bag. The swollen bag-like body 65 is a coarse dust collection filter 105
Since the outer periphery is held down by the filter holding ribs 50, it does not expand 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 coarse dust collecting filter 105 and the filter holding rib 50 as described above, the air permeability of the bag-like body 65 is not impaired. That is, the coarse dust collection filter 105
has sufficient air permeability, and as described above, there are bag-like bodies 65 between each of the filter holding ribs 50 that extend to a position facing the auxiliary coarse dust collection filter 106.
Even if a small amount of dust enters, it does not completely enter and a ventilation path is secured, so the airflow to the outer periphery of the bag-like body 65 is not blocked and dust is collected throughout the bag-like body, resulting in good dust collection. Performance can be obtained.

The dust inside the bag-shaped body 65 is collected using a coarse dust collection filter 1.
Proceed from the part opposite 05. As the opposing portions become clogged, most of the airflow passes through the portions opposing the filter holding ribs 50 and further passes through the coarse dust filter 10 provided on the side and upper sides of the coarse dust filter frame 100.
6 and flows to the second fine dust collecting filter 107 side.

In this way, dust is collected from the bag-shaped body 65 of the first fine dust collecting filter 19.

Bag-like body 65 and second fine dust collection filter 10
If the amount of attached dust increases and the suction force decreases, either rotate the cord reel 31 of the cord winding device 11 or remove the manual handle 109 for the dust remover.
When rotated, the dust is removed from the second fine dust collection filter 107 by the operation of the dust remover 110 as described above, and the dust from the bag-like body 65 is also removed by the operation of the striking rod 122.

As described above, dust removal from the bag-like body 65 is performed by vibration of the coarse dust collecting 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 the dust removing vibration force is applied to the bag-like body 65 through the coarse dust collection filter 105, an unreasonable force that would tear the bag-like body 65 is not applied.

Further, as described above, the coarse dust filter 105 vibrates in a seesaw shape around the receiving protrusion 125, so due to this seesaw vibration,
Since the bag-shaped body 65 is repeatedly bent inward from its outer surface and subjected to impact force, dust adhering to the inner surface of the bag-shaped body 65 is effectively removed.

In addition, a large amount of dust adheres to the part of the bag-shaped body 65 that contacts the coarse dust collection filter 105, but since the dust removal vibration is applied to this part, the dust is removed effectively and contributes greatly to the recovery of the dust collection capacity. That's what I do.

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

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

That is, to remove the first fine dust collecting filter 19, first remove the clamp 4 as shown in FIG.
46 to open the dust case lid 43, and close the dust suction port 67 with the lid 68 of the first fine dust collection filter 19 as described above. At this time, since the recess 42 is formed at the center of the lower part of the recess 38 as described above, the fingertip is easily caught on the lower end of the cover 68 as shown in FIG. Closing becomes easier. After that, by pulling the first fine dust collecting filter 19 outward with the support plate 66, the filter supporting plate 36 is opened, so that the first fine dust collecting filter 19 is opened as shown in FIG. It can be easily pulled out of the dust case 2.

At the time of this drawer, the dust suction port 67 is closed by the cover lid 68, so the dust suction port 67 is closed.
No dust spills out. The first fine dust collection filter 19 that has been pulled out is thrown away with the dust still stored therein. Moreover, the first fine dust collecting filter 19 can be pulled out more easily by the filter drawer guide rib 50'.

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

To remove the first dust collection filter 19 and install a new first dust collection filter 19, as explained above, open the dust case lid 43 and open the opening for the first fine dust collection filter on the front side of the dust case 2. 2a, it can be done regardless 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 fine dust collection filter 107 in the dust collection filter unit 49 is very small (more than 95% is collected by the first fine dust collection filter 19).
dust is collected. ), therefore, the number of times the second fine dust collecting filter 107 is discarded is extremely small compared to the number of times the first fine dust collecting filter 19 is replaced.

Nevertheless, the reason for removing dust from the second fine dust collection filter 107 or discarding the dust is as follows.

That is, even if the first fine dust collection filter 19 is replaced with a new one, the second fine dust collection filter 1
If dust is attached to 07, the suction ability of this vacuum cleaner will not be completely restored. Even though I replaced it with a new first fine dust collection filter 19, there was a problem that the suction performance was inferior, so I replaced it with the second fine dust collection filter 1.
It is necessary to remove dust from the filter 107 and restore the suction capacity of the filter 107.

Furthermore, when the amount of dust collected on the second fine 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 filter 107 will soon deteriorate due to dust adhesion. down. In such a case, remove the dust collecting filter unit 49 from the dust case 2 as shown in FIG.
You have to remove it and throw away the dust.

To discard the dust on the second fine dust collection filter 107 side or to perform maintenance and inspection of the dust collection filter unit 49, remove the dust collection filter unit 49 from the joint side opening on the rear side of the dust case 2. The first fine dust collection filter 1
This can be done independently of the removal of 9, which is good in terms of ease of handling.

The necessity for dust removal by the first and second fine dust collection filters 19 and 107 will be described in detail along the graphs shown in FIGS. 14 and 15.

That is, FIGS. 14 and 15 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, Figure 14 (first fine dust collection filter 19
When the first fine dust collection filter 19 is not used to remove dust, the dust collection performance characteristics shown in (A) are shown. That is, as the amount of dust collected increases, the first fine dust collection filter 19 becomes clogged, the suction strength (suction strength) rapidly decreases, and the suction strength soon becomes saturated (the indicator 25 indicates saturation). ). Let V be the dust collection capacity in this case.

On the other hand, when the first fine dust collection filter 19 is timely removed, the dust collection performance characteristic shown in (b) is exhibited. In other words, when used while removing dust in a timely manner, the dust adhering to the first fine dust collection filter 19 will be removed and the clogging will be cleared, so the suction strength will be restored and the amount of collected dust will increase. The suction strength does not decrease rapidly. Therefore, when the suction strength reaches saturation, the dust collection capacity is 2.5
~3V, or 2.5V compared to the case without dust removal
The dust collection capacity increases by ~3 times.

Next, as shown in FIG. 15, the dust collection performance characteristic C of the entire vacuum cleaner is the sum of the dust collection performance characteristic D of the first fine dust collection filter 19 and the second fine dust collection performance characteristic E. Become. For convenience of explanation, both filters 19 and 107 are used until the suction strength is saturated.
No dust removal shall be carried out.

When the suction strength is saturated, when the first fine 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 decrease in suction strength of the vacuum cleaner as a whole is c, the suction strength as a whole has not completely recovered. That is, the amount of decrease a in the suction strength of the second fine dust collection filter 107 remains.

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

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

The dust airflow flowing into the bag-like body 65 is deflected downward by the deflection suction port 778, and the flow velocity is thereby attenuated, so that the collision force of the dust airflow against the bag-like body 65 is reduced, and damage to the bag-like body 65 is prevented. Contribute to prevention.

Since a 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. That is, as shown in FIG. 13, the dust airflow causes the check valve 86 to open to a position where it is blocked by the deflection suction port 78. Since the opening angle of the check valve 86 is approximately 45 degrees, the dust airflow collides with the check valve 86 and drifts downward. Since the non-return valve 86 has elasticity, the impact surface is bent due to the collision of the dust airflow, and the flow velocity of the airflow is greatly attenuated.

Furthermore, the vent hole 80 is provided in the curved portion of the guide 79 constituting the deflection suction port 78 in order to prevent the check valve 86 from flapping and vibrating due to the dust airflow. That is, when the collision surface is deflected 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 ventilation hole 80. However, if the ventilation hole 80 is not provided, the air in the space will be compressed, and this compression will cause a repulsive force to act on the check valve 86. Since the impact force of the dust airflow on the check valve 86 changes, the repulsive force accompanying the compression also changes, and the change in the repulsive force causes the check valve 86 to vibrate.

However, as described above, since the ventilation hole 80 is provided in the curved portion of the guide 79, there is no repulsive force against the check valve 86 due to the compression of air as described above, and the check valve 86 does not cause vibration.

The above describes the usage pattern when the first fine dust collection filter 19 is set in the dust case 2, but this vacuum cleaner can also be used without using the first fine dust collection filter 19. can.

In this case, coarse dust is collected in the inner space of the dust case 2 in front of the coarse dust collection filter 105, and fine dust is collected in the second fine dust collection filter 107.

The collected dust is sent to the dust collection filter unit 4.
It is convenient to remove the dust case 9 and throw it away from the opening on the joint side of the dust case 2, since coarse dust and fine dust can be thrown away all at once.

When the first fine dust collection filter 19 is used, the coarse dust collection filter 106 does not function as a dust collection filter, but mainly has the function of holding the first fine dust collection filter 19 from the outside.
On the other hand, when the first fine dust collection filter 19 is not used, the coarse dust collection filter 106 performs its original function as a dust collection filter. Further, the coarse dust collection filter 105 can only collect coarse dust, and the collection of fine dust is performed by the second fine dust collection filter 107. Demonstrates dust collection function.

The second fine dust collecting filter 107 removes dust in the same manner as described above, but the coarse dust collecting filter 105 removes dust by vibration of the filter 105 caused by the impact of the striking rod 122.

〔Effect of the invention〕

As described above, according to the present invention, the recess into which the cover fits is provided on the surface of the filter support plate,
At the left and right ends of this recess, there are receivers for receiving the support plate of the dust collection bag.In addition, a recess is provided in the recess where you can insert your fingertips to grasp the filter cover. It is easy to attach the dust collection bag, it is easy to remove the dust collection bag from the filter support plate, and it is easy to cover the dust inlet with a lid to prevent dust from spilling. You can get a vacuum cleaner that is extremely easy to handle.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; Fig. 1 is a vertical sectional view of the entire vacuum cleaner, Fig. 2 is an exploded perspective view of the vacuum cleaner, and Fig. 3 is an exploded view of the main body case. Figure 4 is an exploded perspective view of the dust case, Figure 5 is an exploded perspective view of the dust case lid, Figure 6 is an exploded view of the filter unit,
Figure 7 shows the state in which the first fine dust collecting filter is pulled out from the dust case, and Figure 8 shows the filter unit being taken out from the dust case and the dust on the second fine dust collecting filter side being discharged from the dust case. Figure 9 is a diagram showing the state in which the first fine dust collection filter is attached to the dust case, Figure 10 is a diagram showing the initial state in which the first fine dust collection filter is taken out from the dust case, and Figure 11 is a diagram showing the state. is a view of the coarse dust collection filter from inside,
Fig. 12 is a diagram showing the dust removal of the first fine dust collection filter in relation to the coarse dust collection filter, Fig. 13 is a diagram showing the inflow state of the dust collecting airflow to the first fine dust collection filter, and Fig. 14 is a diagram showing the dust removal state of the first fine dust collection filter. FIG. 15 is a diagram showing the suction performance of the first fine dust collecting filter, and FIG. 15 is a diagram showing the combined suction performance of the first and second fine dust collecting filters. Fig. 16 is an enlarged vertical sectional view of the main part showing the dimensional relationship between the support plate and the receiving part of the first fine dust collecting filter, and the relationship between the suction aperture of the first fine dust collecting filter and the aperture of the suction seal packing; The figure is a longitudinal cross-sectional view showing a state in which a fingertip is inserted into the recess of the filter support plate and the cover portion of the first fine dust collecting filter is bent. 2...Dust case, 2a...Drawer opening, 1
9...Dust collection bag (first fine dust collection filter), 36
... Filter support plate, 38 ... Recess, 39 ...
Receiving part, 42... Recessed part, 65... Bag-like body, 66...
... Support plate, 67 ... Dust suction port, 68 ... Closure lid body.

Claims (1)

[Claims] 1. A bag-like body having breathability and flexibility, a flat support plate which is the mouth plate of the bag-like body and has a dust suction port, and a bag-like body formed integrally with this support plate, and which is formed integrally with the support plate and which is a mouth plate of the bag-like body and has a dust suction port. A dust collection bag equipped with a flat cover that can close the suction port is attached to the drawer opening of the dust case using a flat filter support plate that rotates at the drawer opening. In the vacuum cleaner, a recess into which the cover lid fits is provided on the surface of the filter support plate, a receiving part for receiving the support plate of the dust collection bag is provided at the left and right ends of the recess, and the recess includes: A vacuum cleaner characterized in that a recessed portion is provided into which a fingertip can be inserted and the lid can be grasped.