JPS5839176Y2 - vacuum cleaner - Google Patents

Description

[Detailed description of the invention] This invention involves inserting a primary filter and a secondary filter into a dust collection case, and pivoting the spindle of a sweeper that sweeps the surface of the intake side of the filter in front of the primary filter. death,
This type of vacuum cleaner transmits power to this support shaft from a power shaft provided on the back side of the primary filter via a coupling device, and the presence of the coupling device prevents a portion of the filter from becoming larger.

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

The vacuum cleaner main body 1 is divided into two parts, the front section being a dust collection case 2, and the rear section being a blower case 3.

The dust collection case 2 has a handle 4 on the top surface and a free wheel 5 on the bottom surface, and the blower case 3 has a handle 6 on the top surface and one rear wheel 7 on each side of the lower part.

The dust collection case 2 and the blower case 3 are brought into engagement with the engaging parts 8 and 9 formed at the bottom of each other, and the push-button spring-loaded clamp hook 10 attached to the upper part of the dust collection case 2 is engaged with the upper part of the blower case 3. Combine and connect.

The inside of the blower case 3 is divided into upper and lower parts by a horizontal partition wall 11, with the upper section being a blower chamber 13 for storing an electric blower 12, and the lower section being a cord reel chamber 15 for storing a cord reel 14.

An intake port 16 and an exhaust port 17 are provided before and after the blower chamber 13.

The power cord 18 is connected to the cord reel 14 by the force of the mainspring spring.
This is a normal type winding machine with a vertical shaft 19 tilted slightly forward.
Supported by

A tooth profile is carved on the outer periphery of the upper flange 20 of the cord reel 14 to constitute a gear 21, and a portion of the gear 21 is exposed to the outside through a window 23 formed in the case front wall 22.

The dust collection case 2 has a hose connection port 24 on the front surface, and a check valve 25 for preventing backflow of dust is provided inside the hose connection port 24.

The check valve 25 is biased in the closing direction by a spring 26 wound around the pivot shaft.

The rear portion of the blower case 3 connected to the front wall 22 is an opening, into which a filter device 27 is fitted.

28 is a base frame of the filtration device 27, and a sealing member 29 that is in close contact with the inner surface of the dust collection case 2 and the front surface of the blower case 3 surrounds the base frame.

A primary filter 30 is attached to the front surface of the base frame 28.

The primary filter 30 has windows provided at several locations around a synthetic resin frame 31 molded into a substantially cylindrical shape with a bottom, and a primary filter material 32 with a comparatively rough curvature is stretched across the windows.

- As the filter material 32, a material woven from monofilament such as nylon or polyester is used.

The primary filter 30 is attached to the base frame 28 as seen in FIG.
It is fitted into the front protrusion of the frame 31, and can be freely fitted and removed due to the elasticity of the frame 31.

The dust collection case 2 has a cylindrical shape with a bottom as a whole and is arranged on the horizontal axis, but the inner peripheral surface of the upper part has a circular arc surface 33 as shown in FIG. It has become.

Corresponding to this arcuate surface 33, the upper part of the frame 31 of the primary filter 30 also has a circular cross section, so that an arc-shaped dust is formed between the inner surface of the dust collection case 2 and the outer surface of the primary filter 30. An accumulation space 34 is formed.

- The filter material 32 is stretched over the outer circumferential arcuate surface 35 of the frame 31 facing the dust accumulation space 34, and the remaining part of the frame 31,
That is, the front part 36 and the bottom part 37 are non-ventilated parts without a filter material.

The bottom surface portion 37 bulges downward so as to approach the inner bottom surface of the dust collection case 2, and forms a fine dust collection portion 38.

The left side wall of the fine dust collection section 38 when viewed from the front constitutes a dead end section 39 located at one end of the dust accumulation space 34.

As can be seen from FIG. 2, the fine dust collection section 38 is deviated to the right when viewed from the front, and the dust accumulation space 34 widens in width before the dead end section 39 to form a main accumulation section 40. are doing.

A fine dust discharge port 41 is provided on the front surface of the fine dust storage section 38, and a lid 42 having a pivot point at the top closes this from the outside.

Reference numeral 43 denotes a bottomed cylindrical secondary filter disposed horizontally within the primary filter 30;
and a rear end plate 45, and a secondary filter material 46 supported therebetween.
Consisting of

The material of the secondary filtering material 46 is resin-treated nonwoven fabric or filter paper, and is used by making a band-like material with many pleats and bending it into a cylindrical shape.

In the illustrated embodiment, it is bent into a hexagonal shape like a snowflake.

The outline of the front end plate 44 is the same as the cross-sectional shape of the secondary filter medium 46.

The outer circumference of the rear end plate 45 is circular, but the secondary filter material 4
The outline of the through hole connecting the rear end of 6 is the same as the cross section with filtration.

The front end plate 44 and the rear end plate 45 are molded at the same time by placing the secondary filter material 46 in an injection mold and injecting molten resin.

Reinforcement beams 47 and secondary filtration material 4 are provided at six locations on the outer surface of the secondary filtration material 46 to connect the front and rear end plates 44 and 45.
A protective layer 48 surrounding the inner ridge line of the fold 6 is also molded at the same time using the same base resin.

The protective layer 48 has a slightly different thickness, and the envelope line connecting the inner ends thereof forms a circle.

A spherical recess 49 that tapers toward the inside of the secondary filter 43 is formed in the center of the front end plate 44 .

A central shaft 50 of the secondary filter 43 protrudes from the back surface of the front end plate 44.

The central shaft 50 enters a cylindrical bearing portion 5 formed in the base frame 28, whereby the secondary filter 43 is rotatably supported.

A sealing member 52 is attached around the rear end plate 45 and comes into contact with the front surface of the base frame 28 to maintain airtightness.

Reference numeral 53 denotes a cylindrical power shaft that is inserted into the bearing portion 51 from the rear and fitted on the outside of the thin shaft portion of the central shaft 50.

The front end of the power shaft 53 and the intermediate step of the center shaft 50 are provided with recesses and recesses that engage with each other, thereby connecting the power shaft 53 and the center shaft 50 so as to rotate together.

Further, both shafts 53 and 50 are connected to each other by a washer screwed to the rear end of the central shaft 50 so as to sandwich the bearing portion 51 between them so as not to separate from each other.

The central shaft 50 has a stepped portion that comes into contact with the front end surface of the bearing portion 51, and receives the axial thrust I~ load here.

A large diameter bevel gear 54 is integrally molded at the rear end of the power shaft 53.

Reference numeral 55 denotes a back cover fixed to the lower part of the base frame 28, and forms a gear box 56 between it and the base frame 28, and a gear shaft 57 is pivotally supported in the gear box 56.

A small diameter bevel gear 58 is formed at the upper end of the gear shaft 57.
After sealing the shaft, the bevel gear 54 is made to protrude from the gear box 56.
Bite together.

The gear shaft 57 has a spur gear 59 in the gear box 56 , and a part of the spur gear 59 protrudes from a window 60 formed in the back cover 55 , is inserted into the window 23 on the blower case side, and is inserted into the cord reel 14 . It meshes with the flange gear 21.

An annular sealing member attached to the back cover 55 to surround the windows 60 and 23 of 61 and in contact with the front wall 22 of the blower case,
Air is prevented from coming in from a cord reel chamber 15 communicating with the outside of the machine and being sucked into the electric blower 12.

Note that the inside of the gear box 56 also communicates with the cord noll chamber 15, but since the gear shaft 57 is sealed, air will not escape to the suction side of the electric blower 12.

As inferred from the explanation so far, Code Nord 1
4 serves as a power source for rotating the secondary filter 43.

A dust removing body 62 is provided to remove fine dust adhering to the outer surface of the secondary filter 43 as it rotates.

The dust removing body 62 has its base end attached to the bearing part 51 by an appropriate means such as adhesive.
It is a leaf spring fixed to the filtration medium, and hangs down almost vertically from the bearing part 51, and its tip is inserted between the protective layer 48 of the filter medium wall.

When the secondary filter 43 rotates, the dust removing body 62 removes the protective layer 4 from the protective layer 4.
8 one after another to vibrate the secondary filter 43 and cause fine dust on the outer surface to fall into the fine dust reservoir 38.

Note that both the base frame 28 and the bevel gear 54 have ventilation holes 63 and 64 at several locations, especially the ventilation hole 64 of the bevel gear 54.
can be used as a finger hook, and when the dust collection case 2 is separated from the blower case 3, the bevel gear 54 can be rotated by hooking the finger here to remove dust from the secondary filter 43. There is.

A swing arm 65 is pivotally supported by the front surface 36 of the primary filter 30, and a plate-shaped sweeper 66 extending into the dust accumulation space 34 along the intake side surface of the primary filter 30 is integrally molded at the tip.

The sweeper 66 moves along an arcuate trajectory of about one circumference between a locking shoulder 67 formed on the right side when viewed from the front of the fine dust collection section 38 and a dead end section 39 on the left side.

The swing arm 65 is connected to the secondary filter 43 by a connecting device 68.

The coupling device 68 includes a protrusion 69 formed on the inner surface of the recess 49.
and an elastic arm 71 that is fixed to a support shaft 70 formed on the swing arm 65 and that enters into the recess 49 and engages with the protrusion 69.

Next, the effect will be explained.

Before starting cleaning, it is necessary to pull out the cord 18.

When the cord 18 is pulled out, the secondary filter 43 rotates clockwise in FIGS. 2 and 3 based on a predetermined reduction ratio,
The elastic arm 71 is hooked on the protrusion 69 and the swing arm 65 is rotated in the same direction until the sweeper 66 abuts against the locking shoulder 67.

When the cord 18 is pulled out for a predetermined length, the ratio of rotations of the cord reel 14 and the secondary filter 43 is determined so that the protrusion 69 comes to the solid line position in FIG. Make a mark to do so.

The rotation frequency ratio of the cord reel 14 and the secondary filter 43 will be explained later.

As mentioned above, as the secondary filter 43 rotates at this time, dust is removed from the surface of the secondary filter.

Connect the pulled out cord 18 to the power source and connect it to the hose connection port 24.
When you connect the hose to and operate the electric blower 12,
The check valve 25 is pushed open and air flows in from the hose connection port 24.

The inflowing air collides with the front surface 36 of the primary filter 30, wraps around the outer circumference of the primary filter 30, and passes through the secondary filter material 32.

At this time, relatively large dust such as lint and film contained in the air is captured by the primary filtering material 32 and remains in the dust accumulation space 34.

- The air that has passed through the secondary filtration medium then passes through the secondary filtration medium 46, and at this time, fine dust in the air is captured by the secondary filtration medium 46 and remains on its surface.

After cleaning is completed, it is necessary to disconnect the cord 18 from the power source and wind it around the cord knoll 14.

To do this, it is sufficient to operate a well-known brake device attached to the cord reel 14 to release the brake and release the energy stored in the mainspring, thereby causing the cord reel 14 to rotate in the winding direction. At the same time, the secondary filter 43 also rotates, and dust removal is performed again.

Turning now to the protrusion 69, since the secondary filter 43 now rotates counterclockwise in FIG. 71 and rotate it in the same direction.

In other words, the sweeper 66 starts moving from the standby position after dust removal from each part of the secondary filter 43 has been completed.

When the resistance of the sweeper 66 is added, the rotation speed of the secondary filter 43 slows down, and the dust removal function is slightly reduced.
In this way, before starting the sweeper 66, the secondary filter 4 is
Providing a period in which only No. 3 rotates is significant in terms of ensuring a constant dust removal effect.

When the sweeper 66 starts rotating, the dust accumulated on the outside of the secondary filter medium 32 is swept away from the filter medium and pushed toward the main accumulation section 40 of the dust accumulation space 34.

When the cord 18 is fully spooled, the sweeper 66 completes its rotation stroke before the dead end 39 and awaits the next cord withdrawal.

In this way, the sweeper 66 reciprocates a predetermined stroke in response to the insertion and removal of the cord 18, so the dust on the outside of the primary filter 30 is pushed to one place every time it is cleaned, and the primary filter 30 is cleaned by sweeping the dust. That will happen.

It will be cleaned by sweeping the dust.

When the amount of accumulated dust becomes large enough to overflow from the main accumulation section 40, the sweeper 66 begins to compress the dust.

In other words, let's push the dust toward the dead end part 39 and compact it.

Therefore, the main accumulation section 40 can be tightly packed with dust.

As the amount of accumulated dust increases, the resistance applied to the sweeper 66 increases, but since it would be a problem if the cord reel 14 were to fall during winding, the connecting device 68 is activated when the resistance reaches a predetermined value. The sweeper 66 and the secondary filter 43 are disconnected from each other.

That is, when the resistance applied to the press plate 66 increases during the compression stroke, the elastic arm 71 is deflected forward by the projection 69 as shown by the imaginary line in FIG.
slides over the elastic arm 71.

In other words, even if the press plate 66 stops midway, the cord reel 1
4 continues the rotation, winds the cord to the end, and removes dust from the secondary filter 43 to the end.

Next, when the cord 18 is pulled out, the projection 69 immediately hooks the elastic arm 71, causing the sweeper 66 to return.

This time, before pulling out the cord 18 for a predetermined length,
Since the cord 18 stops when it hits the shoulder 67, in order to pull out the cord 18 a predetermined length, it is necessary to pull the cord 18 a little forcefully to make it slide over the protrusion 69 in the opposite direction.

Since the coupling device 68 has many chances of wear as described above, measures are taken to reduce the wear, such as rounding the corners of the protrusion 69 and the elastic arm 71, and carefully considering the material of the elastic arm 71.

The coarse dust accumulated in the dust accumulation space 34 can be disposed of by separating the dust collection case 2 from the blower case 3 and removing the filtering device 27. It can be thrown away from the outlet 41.

The operation so far has been explained assuming that by pulling out the cord 18 for a predetermined length, the secondary filter 43 rotates approximately 1 and 7 times, that is, approximately 1 additional rotation in addition to the rotation stroke of the sweeper 66. It's here.

Rotating the secondary filter 43 beyond the rotation stroke of the sweeper 66 is a consideration for sufficient dust removal, but if the connecting device 68 with a large free rotation distance as in this embodiment is used, approximately Approximately one extra rotation can be added.5. Moreover, it is possible to prevent the coupling device 68 from slipping over while the cord reel 14 is rotating.

However, if the connecting device 68 is designed to have a long life, it does not matter if the number of slips increases, so the secondary filter 43 may be rotated several times or more for a predetermined length of the cord 18 to be pulled out.

In either case, in order to remove dust by rotating only the secondary filter 43 before the sweeper 66 starts rotating in the compression direction, when the cord 18 is pulled out a predetermined length, the protrusion 69 is at the solid line position in FIG. That's the important thing.

Therefore, the dust collection case 2 and the blower case 3 must be connected under certain conditions.

The conditions are as follows: the cord 18 must be wound all the way to the end, and the secondary filter 43 must be turned until the sweeper 66 hits the dead end 39, and these conditions should be displayed somewhere on the aircraft. Just leave it there.

When the cord 18 is pulled out from this state, the rotation frequency ratio of the cord reel 14 and the secondary filter 43 may be set so that the cord 18 will be in the state shown in FIG. 3 when it is pulled out a predetermined length.

As described above, the present invention is a vacuum cleaner in which a filter device is removably attached to a dust collection case that is detachably connected to a blower case housing an electric blower, the filter device is attached to a base frame, and A cylindrical secondary filter is attached, a primary filter is detachably attached to the base frame so as to cover the secondary filter, and a primary filter is rotatably supported on the front surface of the secondary filter, and a sweeper that sweeps the intake side surface of the filter, and when the secondary filter is attached to the base frame, the rotating secured body of the sweeper, which is provided protruding from the secondary filter side of the primary filter, and the secondary filter are Since the sweeper is actuated by engaging with the power coupling engagement body formed in the recess on the front surface of the secondary filter, the coarse dust layer that increases ventilation resistance can be removed from the surface of the primary filter, improving dust suction performance. can be enhanced.

In addition, by engaging the rotating engaged body of the sweeper that protrudes from the primary filter to the secondary filter side and the power coupling engaging body formed in the recess on the front surface of the secondary filter, the gap between both filters can be reduced and the primary filter can be assembled with the primary filter. Even if the dust collection space between the inner surfaces of the dust case is increased in proportion, there is an advantage that the entire vacuum cleaner can be made smaller.

[Brief explanation of drawings]

The figures show an embodiment of the vacuum cleaner of the present invention, in which Fig. 1 is a vertical sectional view of the central part, Fig. 2 is a sectional view taken along the line II-II of Fig. 1, and Fig. 3 is a partial view. FIG. 4 is a front view of the primary filter cut away, and FIG. 4 is an enlarged sectional view of the main part. 2...Dust collection case, 30...Primary filter, 66...Sweeper 170...
・Support shaft, 43...Secondary filter, 49...
...Recess, 53...Power shaft, 68...
・Connection device.

Claims (1)

[Scope of utility model registration request] A filter device is removably attached to a dust collection case that is detachably connected to a blower case housing an electric blower, and the filter device includes a base frame and a cylindrical secondary filter attached to the base frame. a primary filter detachably attached to the base frame so as to cover the secondary filter; and a primary filter rotatably supported on the front surface of the secondary filter and sweeping the intake side surface of the secondary filter. The rotary engaged body of the sweeper is formed in a recess on the front surface of the secondary filter, and is formed in a recess on the front surface of the secondary filter and a rotary engaged body of the sweeper, which is provided to protrude from the secondary filter side of the primary filter by mounting the primary filter on the base frame. The vacuum cleaner is characterized in that the sweeper is operated by engaging the power coupling engaging body.