JPS6148935B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel vacuum cleaner in which a rotary sweeper is provided on the outer surface of a primary filter, and this sweeper sweeps out dust attached to the primary filter to improve dust suction performance. can be,
In particular, the object is to provide a structure that is easy to assemble and allows maintenance and inspection of the secondary filter disposed within the primary filter to be carried out without difficulty.

An embodiment of the present invention will be described below with reference to the drawings.
The vacuum cleaner body 1 is divided into two parts: front and rear, the front section is a dust collection case 2, and the rear section is a blower case 3.
It is becoming. The dust collection case 2 has a handle 4 on the upper surface and a free front wheel 5 on the lower surface, and the blower case 3 has a handle 6 on the upper 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 clamp hook 10 attached to the top of the dust collection case 2 is attached to the top of the blower case 3. Connect by engaging.

The inside of the blower case 3 is divided into upper and lower halves by a horizontal partition wall 11, and the upper section houses the electric blower 1.
The lower section is a cord reel chamber 15 that houses the cord reel 14. An intake port 16 and an exhaust port 17 are provided before and after the blower chamber 13. The cord reel 14 is of a conventional type that winds up the power cord 18 using the force of a mainspring spring, and is supported by a vertical shaft 19 tilted slightly forward. Upper flange 2 of cord reel 14
A tooth profile is carved on the outer periphery of the case 2 to form 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 torsion 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 filtration device 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 is a synthetic resin frame 31 molded into a substantially bottomed cylindrical shape with windows provided at several locations around the periphery, and a relatively coarse primary filter material 32 is stretched across the windows. As the primary filter material 32, a monofilament material such as nylon or polyester is used. The primary filter 30 is fitted into the front protrusion of the base frame 28, as seen in FIG.
Due to the elasticity of the frame 31, it can be freely fitted and removed. 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 an arcuate surface 33 as shown in FIG. It's summery. Corresponding to this arcuate surface 33, the upper part of the frame 31 of the primary filter 30 also has a circular cross-section. An accumulation space 34 is formed. Primary filter material 3
2 is stretched over the outer peripheral arcuate surface 35 facing the dust accumulation space 34 of the frame 31, 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. Second
As can be seen from the figure, the fine dust collection section 38 is deviated to the right when viewed from the front, and the dust accumulation space 34 expands in width before the dead end section 39 to form a main accumulation section 40. are doing. A fine dust outlet 41 is provided on the front surface of the fine dust reservoir 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, which consists of a front end plate 44 and a rear end plate 45 made of synthetic resin, and a secondary filtering material 46 supported between them. . Secondary filter material 46
The material is resin-treated nonwoven fabric or filter paper,
A strip of material is made with many pleats and then bent into a cylindrical shape. In the illustrated embodiment, it is bent into a hexagonal shape like a snow crystal. The outline of the front end plate 44 is the same as the cross-sectional shape of the secondary filter medium 46. Rear end plate 4
5 has a circular outer circumference, but the secondary filter material 46
The outline of the through hole connecting the rear end of the filter is the same as the cross section of the filter medium. 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. There are also reinforcing beams 47 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, and a protective layer 48 that wraps around the internal ridges of the folds of the secondary filtration material 46.
Molded at the same time using the same synthetic resin. The protective layer 48 has a slightly different thickness, and is configured such that an envelope connecting the inner ends thereof draws a single circle.
A spherical recess 49 is formed in the center of the front end plate 44 and is recessed toward the inside of the secondary filter 43. A central shaft 50 of the secondary filter 43 protrudes from the back surface of the front end plate 44. central axis 5
0 enters a cylindrical bearing portion 51 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. Also, both shafts 53, 5
By screwing a washer to the rear end of the central shaft 50, the shafts 0 are connected to each other in a way that the bearing portion 51 is sandwiched therebetween so as not to separate from each other. The center shaft 50 has a stepped portion that comes into contact with the front end surface of the bearing portion 51, and is adapted to receive an axial thrust load here.

A large diameter bevel gear 54 is integrally molded at the rear end of the power shaft 53. A back cover 55 is fixed to the lower part of the base frame 28, and forms a gear box 56 between it and the base frame 28, in which a gear shaft 57 is pivotally supported. Gear shaft 5
A small-diameter bevel gear 58 is formed at the upper end of the gear 7, and after the shaft is sealed, the gear box 56 protrudes from the gear box 56 and meshes with the bevel gear 54. 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, enters the window 23 on the blower case side, and passes through the cord reel 14.
It meshes with the flange gear 21 of. 61 is window 60
an annular sealing member attached to the back cover 55 in a manner that surrounds and 23 and contacts 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 is also the code reel chamber 1.
5, but since the gear shaft 57 is sealed, air will not escape to the suction side of the electric blower 12.

As can be inferred from the above description, the cord reel 14 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 bearing part 51 and hangs down almost vertically from the bearing part 51, and its tip is connected to the protective layer 48 of the filter material folds.
It's stuck in between. When the secondary filter 43 rotates, the dust remover 62 repels the protective layer 48 one after another, vibrates the secondary filter 43, and causes it to fall into the fine dust reservoir 38 on the outer surface. Note that both the base frame 28 and the bevel gear 54 have ventilation holes 63 and 64 at several locations. In particular, 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, and the secondary filter 43 can be opened. It is now possible to remove dust.

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 outer surface of the primary filter 30 is integrally molded at the tip.
The sweeper 66 moves along an arcuate trajectory of about three-quarters of the 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. do. The swing arm 65 is connected to the secondary filter 43 by a clutch device 68.
The clutch device 68 has a protrusion 69 formed on the inner surface of the recess 49 as a clutch output part, and is fixed to the shaft part 70 of the swing arm 65, and has an elastic arm 71 that enters the recess 49 and engages with the protrusion 69. is the clutch input section.

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 switches to the second filter based on the predetermined reduction ratio.
In the figure and FIG. 3, the protrusion 6 rotates clockwise.
At 9, the elastic arm 71 is hooked 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 has been pulled out for a predetermined length, the cord reel 14 and the secondary filter 4 are connected so that the protrusion 69 is at the solid line position in FIG.
A rotation frequency ratio of 3 is determined, and a mark is placed in the middle of the cord 18 to instruct the stop of the drawer. 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, dust is removed from the surface of the secondary filter.

Now, when the pulled out cord 18 is connected to a power source, a hose is connected to the hose connection port 24, and the electric blower 12 is operated, the check valve 25 is pushed open and air flows in from the hose connection port 24. The incoming air collides with the front surface 36 of the primary filter 30, wraps around the outer circumferential direction of the primary filter 30, and passes through the primary filter medium 32. At this time, relatively large dust particles such as lint and cotton dust contained in the air are captured by the primary filter material 32 and remain in the dust accumulation space 34. The air that has passed through the primary filter medium is then passed through the secondary filter medium 4.
At this time, the fine dust in the air is captured by the secondary filter material 46 and remains on its surface.

After cleaning, it is necessary to disconnect the cord 18 from the power source and wind it onto the cord reel 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 is completed. When the resistance of the sweeper 66 is applied, the rotation speed of the secondary filter 43 slows down, and the dust removal function is slightly reduced. Therefore, providing a period in which only the secondary filter 43 rotates before starting the sweeper 66 is a constant This is significant in terms of ensuring the dust removal effect of

When the sweeper 66 starts rotating, the dust accumulated on the outside of the primary 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 wound, the sweeper 66 completes its rotation stroke before the dead end 39 and waits for the next cord withdrawal. In this way, the sweeper 66 reciprocates by a predetermined stroke in response to the insertion and removal of the cord 18.
Every time the cleaning is performed, the dust on the outside of the primary filter 30 is pushed to one place, and the primary filter 30 is cleaned by sweeping the dust. When the amount of accumulated dust becomes large enough to overflow from the main stack 40, the sweeper 66 begins to compress the dust. In other words, the dust is pushed toward the dead end portion 39 and compacted. Therefore, the main accumulation section 40 can be tightly packed with dust. As the amount of dust accumulated increases, the sweeper 66
However, since it would be a problem if the cord reel 14 stopped midway through winding, the clutch device 68 is activated when the resistance reaches a predetermined value to disconnect the sweeper 66 and the secondary filter 43. I try to cut it off. That is, when the resistance applied to the sweeper 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. That is, even if the sweeper 66 stops midway, the cord reel 14 continues to rotate, winding the cord to the end, and removing dust from the secondary filter 43 to the end. Next, when the cord 18 is pulled out, the protrusion 69 immediately hooks the elastic arm 71, causing the sweeper 66 to return. This time, the sweeper 66 hits the shoulder 67 and stops before the cord 18 is pulled out a predetermined length, so in order to pull out the cord 18 a predetermined length, pull the cord 18 a little forcefully and move the protrusion 69 in the opposite direction. You need to slide over it. Since the clutch device 68 has many chances of wear as described above, measures are taken to reduce the wear, such as rounding the corners of the projection 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 filtration device 27. The dust can be disposed of through the dust outlet 41.

The operation so far has been described on the assumption that by pulling out the cord 18 for a predetermined length, the secondary filter 43 rotates approximately one and three-quarters of a turn, that is, approximately one additional rotation in addition to the rotational stroke of the sweeper 66. I have been progressing. Rotating the secondary filter 43 beyond the rotation stroke of the sweeper 66 is a consideration for sufficient dust removal.
8, it is possible to add approximately one extra rotation, and moreover, it is possible to prevent the clutch device 68 from slipping over while the cord reel 14 is rotating. However, clutch device 6
If 8 is designed to have a long life, it does not matter if the number of times the cord 18 slips over increases, so the structure may be such that the secondary filter 43 is rotated several times or more for a predetermined length of the cord 18 to be drawn out. In any 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
It is important that the line be located at the position indicated by the solid line in FIG. Therefore, the dust collection case 2 and the blower case 3 must be connected under certain conditions. The conditions are that cord 18 must be wound all the way to the end.
The secondary filter 43 only needs to be rotated until the sweeper 66 hits the dead end 39, and this can be displayed somewhere on the aircraft. When the cord 18 is pulled out from this state, the cord reel 14 and the secondary filter 4
All you have to do is set the 3-rotation frequency ratio.

As described above, the vacuum cleaner of the present invention has a secondary filter attached to the front of the base frame that fits into the dust collection case, and a primary filter that wraps around the secondary filter, and a support shaft of the sweeper is attached to the front of the primary filter. The dust is swept from the surface of the primary filter by rotating the sweeper.

As described above, the vacuum cleaner according to the present invention includes a base frame that is detachably attached to a dust collection case, a secondary filter that is rotatably attached to the base frame and driven by a power shaft, and a secondary filter that is fixed to the base frame. a dust remover of the secondary filter, which is detachably attached to the base frame so as to surround the secondary filter; The filter comprises: a plate-shaped sweeper that reciprocates in contact with a filtering surface; a protrusion provided on the front surface of the secondary filter facing the support shaft; and an elastic arm fixed to the support shaft; Since the rotational force of the power shaft is transmitted to the plate-shaped sweeper through the protrusion and the elastic arm, the dust attached to the filtration surface of the primary filter is removed at the same time as the dust of the secondary filter is removed. can be swept to improve dust suction performance. Further, since the primary filter is detachably attached to the base frame, maintenance and inspection of the secondary filter can be easily performed by removing the primary filter from the base frame. Furthermore, if the primary filter is mounted on the base frame, the rotational force from the power shaft can be easily transmitted to the plate-shaped sweeper via the protrusions and elastic arms, making assembly simple.

[Brief explanation of the drawing]

The figure shows one embodiment of the vacuum cleaner of the present invention.
The figure is a vertical sectional view of the central part, Figure 2 is a sectional view taken along the - line in Figure 1, Figure 3 is a front view of the partially broken primary filter, and Figure 4 is an enlarged sectional view of the main part. It is. 2... Dust collection case, 28... Base frame, 43... Secondary filter, 30... Primary filter, 66...
...Sweeper, 70... Support shaft, 69... Protrusion (clutch output part), 71... Elastic arm (clutch input part).

Claims (1)

[Claims] 1. A base frame that is detachably attached to the dust collection case, a secondary filter that is rotatably attached to the base frame and driven by a power shaft, and a dust remover of the secondary filter that is fixed to the base frame. A primary filter is detachably attached to the base frame so as to surround the secondary filter, and the primary filter is pivotally supported by a support shaft at the front of the primary filter and rotates reciprocatingly in contact with the filtration surface of the primary filter. It includes a plate-shaped sweeper, a protrusion provided on the front surface of the secondary filter facing the support shaft, and an elastic arm fixed to the support shaft, and the power shaft is connected to the power shaft via the protrusion and the elastic arm. A vacuum cleaner characterized in that the rotational force of is transmitted to the plate-shaped sweeper.