JPS6329499Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a vacuum cleaner that removes dust by applying an operating force from outside the filter body. Recently, it has become common to perform the dust removal operation whenever the filter body is felt to be clogged, or periodically before and after use, in order to keep the vacuum cleaner in good condition for a long period of time and to lengthen the interval between dust disposals. The key to this type of device is how to prevent dust that has fallen off from re-adhering. This invention was made with this in mind, and is a device that effectively prevents dust from re-adhering by skillfully combining the dust removal operation with the operation of processing the fallen dust.

An embodiment of the present invention will be described below with reference to the drawings. A vacuum cleaner 1 is divided into two parts, a dust collection case 2 and a blower case 3, in the front and rear. The dust collecting case 2 has an L-shaped handle 5 having a vertical handle part 4 at the front fixed to the upper surface, and has a freely adjustable front wheel 6 on the lower surface. The blower case 3 has a handle 7 on the top surface,
A pair of rear wheels 8, 8 are provided on both sides of the lower part.
The protrusion 9 at the lower rear end of the dust collection case 2 is engaged with the receiving part 10 at the lower front end of the blower case 3, and the dust collection case 2 is closed.
By engaging the spring-loaded clamp hook 11 at the upper rear end with the upper front end of the blower case 3, both cases are connected.

Next, the internal structure of the dust collection case 2 will be explained with reference to FIGS. 1 and 2. The dust collection case 2 has a hose connection port 12 on the front side, and a check valve 13 is provided inside the hose connection port 12. The rear surface of the dust collection case 2 is completely open, and a filter device 14 is attached to the opening. Reference numeral 15 denotes a filter tube support plate which is the center of assembly of the filter device 14, and a sealing member 16 that is in close contact with the inner surface of the dust collection case 2 and the front surface of the blower case 3 is attached to the periphery of the support plate. A primary filter frame 17 is connected to the filter cylinder support plate 15 via a seal member 16, and a primary filter 19 made of nylon net is stretched over windows 18 provided here and there. A dust chamber 20 is formed at the bottom of the primary filter frame 17. The dust chamber 20 has a tunnel-like shape and has an upwardly directed inlet 21 adjacent to the support plate 15 and an outlet 22 in the front face of the primary filter frame 17. The outlet 22 is the primary filter frame 1
It is closed with a lid 23 pivoted at 7. The lid 23 normally closes the outlet 22 by gravity, but when dust is being sucked in, wind pressure is applied and the lid 23 closes even more tightly. Now, support plate 15
A ventilation tube 24 extending into the primary filter frame 17 is formed approximately in the center. Reference numeral 25 denotes a filter tube attached to the ventilation tube 24, and a secondary filter 26 formed by pleating and having a chrysanthemum-like cross section is sandwiched between the front end plate 27 and the rear end plate 28 like a sandwich. As the secondary filter 26, a nonwoven fabric processed with resin and cured is used. The front end plate 27 is a press-molded sheet metal product, and is fixed to the secondary filter with adhesive. The rear end plate 28 is obtained by molding a soft synthetic resin into the secondary filter 26, and has a through hole in the center and uses its elasticity to close the ventilation tube 24.
It is attached by press-fitting it into the Rear end plate 2
8 has a slit 29 between the folds of the secondary filter 26, and has a chrysanthemum shape similar to the secondary filter 26. A bearing tube 31 is supported inside the ventilation tube 24 by three spokes 30. A dust removal body shaft 33 having a bevel gear 32 at its rear end is pivotally supported by the bearing sleeve 31 . A dust removing body 34 is attached to the front end of the dust removing body shaft 33. The dust removing body 34 is made of a molded plate spring, and has a large curled portion 35 and a small curled portion 36 at both ends, as shown in FIG. The large curl portion 35 fits onto the dust removal body shaft 33, and the inwardly bent portion 37 at the end of the curl engages with the axial groove 38 of the dust removal body shaft 33, thereby ensuring rotation prevention. The small curl part 36 is the filter cylinder 25
Shallow engagement between the vertices of the inner folds. Large curl part 3
5 is strongly press-fitted to the dust removal body shaft 33, thereby firmly mounting the dust removal body 34, and also attaching the dust removal body 34 to the dust removal body shaft 33.
At the same time, it also prevents it from coming off. Therefore, the assembly procedure is to support the dust removal body shaft 33 and prevent it from coming off with the dust removal body 34, and then to cover the ventilation cylinder 24 with the filter cylinder 25 from the front. Note that 39 in the figure
are a plurality of ribs formed on the upper and lower inner surfaces of the dust collection case 2 to regulate the fitting depth of the filter device 14.

Next, the internal structure of the blower case 3 will be explained based on FIGS. 1 and 3. The interior of the blower case 3 is divided into upper and lower halves by a horizontal partition plate 40 to form an electric blower chamber 41 and a cord reel chamber 42.
The electric blower chamber 41 has an intake port 43 on the front surface and an exhaust port 44 on the rear surface, and an electric blower 45 is supported inside. A fixed shaft 46 is vertically disposed inside the cord reel chamber 42, and a cord reel 47 is supported around it. 48 is code reel 47
The cord is wound around the cord and is pulled out from the cord outlet 49 on the side of the blower case 3. Reference numeral 50 denotes a mainspring spring stored in a mainspring storage section 51 on the lower surface of the cord reel 47, one end of which is fixed to the fixed shaft 46 and the other end to the cord reel 47, and the cord reel 47 is always shown by arrow A in FIG. It is biased in the cord winding direction. 52 is pushed into a wedge-shaped space formed by the lower flange 53 of the cord reel 47 and the inner wall of the blower case 3, and the cord reel 47
This is a brake roller that applies braking to the rotation in the winding direction, and is supported by a brake rod 54. The brake rod 54 is sandwiched between a pair of upper and lower guide ribs 55, 55 formed on the inner wall of the blower case 3, and is slidable in the front and rear direction, and is supported by a spring 56 in the direction in which the brake roller 52 applies the brake. It is always energized. 57 is blower case 3
A brake release member is swingably supported by a support shaft 58 that crosses the inside of the fan case 3, and its lower end protrudes to the outside from an opening 59 provided at the corner of the blower case 3. Blower case 3
A round protrusion 6 that protrudes further rearward from the rear surface 60
1 is formed. This protrusion 61 comes into contact with the floor surface when the blower case 3 is tilted or stood with the rear surface 60 facing down, and the brake release member 57 is rotated counterclockwise. The position of the floor surface in such a case is shown in FIG. 1 by dash-dotted lines A and B. Since one end of the brake rod 54 is in contact with the front surface of the brake release member, when the brake release member 57 is rotated counterclockwise, the brake rod 54 is pushed forward, the braking by the brake roller 52 is released, and the cord is released. The reel 47 begins to rotate in the winding direction. Reference numeral 62 denotes a transmission shaft that is pivotally supported on the front wall 63 of the blower case 3, and has bevel gears at both front and rear ends.The front bevel gear 64 meshes with the bevel gear 32 on the dust collection case 2 side, and the rear bevel gear 65 meshes with a bevel gear 67 formed on the upper flange 66 of the cord reel 47. Reference numerals 68 and 69 denote brushes supported by the insulating terminal board 70 on the bottom surface of the partition plate 40, which contact a slip ring (not shown) on the top surface of the cord reel to extract current and supply it to the electric blower 45. . The blower case 3 consists of a pair of left and right divided bodies 3a and 3b, including a partition plate 40, an electric blower 45, a fixed shaft 46, and a support shaft 5.
8. The transmission shaft 62 and the like are held between the two divided bodies.

Next, the effect will be explained. When the electric blower 8 is operated by connecting the dust collection case 2 and the blower case 3 and connecting a hose (not shown), air containing dust flows into the dust collection case 2 through the hose connection port 13. Large particles of dust are filtered by the primary filter frame 17, and small particles of dust that have passed through the primary filter 19 are filtered by the outer surface of the filter cylinder 26. When cleaning is finished, unplug the end of the cord 48 from the outlet, hold the vertical handle 4 of the dust collection case 2, pull up the front of the vacuum cleaner 1, and release the brake release member 5.
7 in contact with the floor. Then code reel 47
starts winding rotation, the transmission shaft 62 rotates clockwise when viewed from the front, and the dust removal body shaft 33 rotates counterclockwise. At the same time, the dust removing body 34 repels the folds of the filter tube 25 from the inner surface, and separates the outer dust from the filter surface. Since the whole body is tilted, dust is collected from the rear end plate 2.
The particles fall through the slits 29 of No. 8 onto the support plate 15, slide over the surface of the support plate 15, and enter the dust chamber 20. The dust that did not enter the dust chamber due to the inclination will surely fall and enter the dust chamber 20 when the vacuum cleaner 1 is returned to the horizontal position next time. Note that if it is troublesome to keep the vacuum cleaner 1 tilted while winding the cord 48, the vacuum cleaner 1 may be stood upright with the rear surface 60 facing down. Even in this case, the brake release position is maintained, and the cord reel 47 continues to rotate until the cord 48 is wound. In this case, all the dust is removed from the support plate 15.
It will fall onto the top and stay there, and will enter the dust chamber 20 when the vacuum cleaner 1 is returned to the horizontal position. Since the width of the inlet 21 is narrow, the dust that has entered the dust chamber 20 is not affected by the subsequent suction airflow, and is transferred to the filter cylinder 20.
5 will not be reattached. Note that dust removal is also performed when the cord 48 is pulled out by hand, but at this time, since the vacuum cleaner 1 is horizontal, the dust in the upper half of the filter tube 25 does not fall, and the dust that falls also enters the dust chamber 20. Since this method does not involve winding, it is not as effective as cord winding.

Further, in this embodiment, the brake of the cord reel 47 is released both when the vacuum cleaner 1 is tilted and when it is completely upright, but the brake is released only in one of the states. It is not particularly inconvenient to configure this.

As described above, in this invention, the dust collection case is connected to the front of the blower case, and the filter body dust removal device on the dust collection case side is driven by the cord winding rotation of the cord reel inside the blower case. The entrance of the dust chamber is opened below the filter cylinder support plate that protrudes toward the rear of the blower case. A brake release member is provided to release the brake of the cord reel. Therefore, cord winding is performed with the filter tube tilted or standing vertically, and the dust that falls from the filter tube during the dust removal operation at that time is removed at the same time, or when the vacuum cleaner is later leveled.
Since the dust enters the dust chamber using the filter tube support plate as a guide, there is no problem in storing dust even if the front and back width of the entrance of the dust chamber is narrowed, and the influence of airflow when suction is resumed is minimized. can. Furthermore, since the dust removal action is performed each time the cord is wound up, the re-adhesion of dust is reduced, and strong dust suction can be ensured for a long period of time. Additionally, if a handle is provided at the front of the dust collection case, it will be convenient to tilt or stand up the vacuum cleaner.

[Brief explanation of the drawing]

The drawings show an embodiment of the vacuum cleaner of the present invention, in which Fig. 1 is a longitudinal sectional view, Fig. 2 is a cross-sectional view at - in Fig. 1, and Fig. 3 is a cut at a point corresponding to the - line in Fig. 1. FIG. 4 is an exploded perspective view of the main parts. 3...Blower case, 2...Dust collection case, 47
... code reel, 25 ... filter cylinder (filter body),
34...dust removal body, 15...filter cylinder support plate, 20...
...Dust chamber, 21...Inlet, 57...Brake release member, 4...Vertical handle (handle at the front of the dust collection case).

Claims (1)

[Scope of claim for utility model registration] 1. Connecting a dust collection case to the front part of the blower case,
In a device that drives a filter body dust removing device located in a dust collection case by winding and rotating a cord of a cord reel in a blower case, a filter cylinder support is provided in which a rear opening of the dust collection case is made to project forward with a filter cylinder. A dust chamber is closed by a plate, and a dust chamber is formed below the filter cylinder with an entrance adjacent to the support plate, and at the rear of the blower case, the front part of the vacuum cleaner is lifted up or This vacuum cleaner is equipped with a protruding brake release member that contacts the floor and releases the brake of the cord reel when the vacuum cleaner is stood with its rear facing down. 2. The vacuum cleaner according to claim 1 of the utility model registration claim, which is provided with a handle on the front part of the dust collection case.