JP2019063023A - Vacuum cleaner - Google Patents

Abstract

To provide a vacuum cleaner of an inexpensive structure capable of enhancing dust collecting performance by capturing fine dust with an entire secondary filter.SOLUTION: A vacuum cleaner 1 includes: a dust collection container 3 attached to a cleaner body 2; a primary filter body 25 having a primary filter 28 attached to the dust collection container 3; and a secondary filter body 26 attached to the primary filter body 25. A support body 43 for supporting a bag-like secondary filter 44 having mobility is provided to the secondary filter body 26, and a closed end 44B side of the secondary filter 44 is folded back inside the support body 43. When the secondary filter body 26 is attached to the primary filter body 25, a protrusion 35 in the center of the primary filter body 28 is inserted inside the support body 43. A bottom rib 34 whose upper edge 34T is higher than a lower edge 30B of a lower stage window part 30, which is the lower end of the primary filter 28, is formed at the bottom of the primary filter body 25.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a vacuum cleaner, and more particularly to the structure of a filter portion.

  Conventionally, as a vacuum cleaner of this type, a vacuum cleaner main body incorporating an electric blower, a dust collection container detachably attached to the vacuum cleaner main body, and a dust collection container detachably A tubular body (primary filter body) attached and provided with a primary filter, and a secondary filter body removably attached to the downstream side of the tubular body and provided with a bag-like secondary filter And the secondary filter body is provided with a support for supporting the flexible secondary filter, and the closed end side of the secondary filter is folded back so that the inside of the support is reversed, A protrusion which protrudes and extends to the secondary filter side is provided at a central portion of the cylindrical body, and the projection is inserted inside the support when the secondary filter body is attached to the cylindrical body. Know what to do Is (e.g., see Patent Document 1.). And in this vacuum cleaner, the air stream which passed through the above-mentioned primary filter passes through the above-mentioned secondary filter. Thus, relatively coarse dust is captured by the primary filter, and fine dust that has passed through the primary filter is captured by the secondary filter. In addition, since the secondary filter is folded back, fine dust that has passed through the primary filter is captured on both the proximal end side and the folded portion of the secondary filter.

JP, 2009-279284, A

  However, in such a vacuum cleaner, virtually no dust is captured at the folded back portion of the secondary filter. This is because, when the downstream side of the air flow in the secondary filter body is defined as the upper side, the lower end of the primary filter formed in the primary filter body is above the lower end of the secondary filter. Although it is possible to provide a primary filter at the bottom of the primary filter body, the mesh sheet to be the primary filter is not wrinkled at the position corresponding to the side and bottom of the primary filter body in the molding die. There is a problem that it is difficult to arrange and form the primary filter body, which leads to an increase in cost.

  An object of the present invention is to solve the above problems, and to provide an electric vacuum cleaner having an inexpensive structure and capable of capturing fine dust in the entire secondary filter to enhance dust collection performance.

  According to a first aspect of the present invention, there is provided an electric vacuum cleaner comprising: a vacuum cleaner main body including an electric blower; a dust collection container detachably attached to the vacuum cleaner main body; A primary filter body which is mounted on the side and is provided with a primary filter on the side, and a secondary filter body which is detachably mounted on the downstream side of the primary filter body and is provided with a bag-like secondary filter having flexibility. The secondary filter body is provided with a support for supporting the secondary filter, the closed end side of the secondary filter is folded back inside the support, and the central part of the primary filter body is There is provided a protrusion extending to the secondary filter side, and the protrusion is inserted inside the support when the secondary filter body is attached to the primary filter body. In the air cleaner, when the downstream side of the air flow in the secondary filter body is the upper side, a bottom rib having an upper end above the lower end of the primary filter is formed on the bottom of the primary filter body, The projection is formed at the center of the bottom rib.

  Further, in the electric vacuum cleaner according to claim 2 of the present invention, in claim 1, the projection has a concave portion forming an air passage.

  Further, in the electric vacuum cleaner according to a third aspect of the present invention, in the second aspect, the projections are formed such that the plate-like members intersect with each other, and the air passages are between the plate-like members. .

  The vacuum cleaner according to claim 1 of the present invention is configured as described above, whereby the air flow drawn from the upper part of the primary filter provided on the side surface of the primary filter body is the proximal end of the secondary filter. Since the air flow passing through the side and drawn from the lower part of the primary filter passes through the range from the folded back part of the secondary filter to the closed end, fine dust is captured by the entire secondary filter to collect dust Can be enhanced.

  In addition, since the projection has a recess that constitutes an air passage, the air flow drawn from the lower part of the primary filter can be reliably sent to the range from the folded portion of the secondary filter to the closed end.

  Further, since the projections are formed by intersecting the plate-like members, and the air passages are formed between the plate-like members, the projections having the air passages can be formed with a simple structure.

BRIEF DESCRIPTION OF THE DRAWINGS It is an external view of the vacuum cleaner which shows one Embodiment of this invention, (a) is a front view, (b) is a right view. It is XX sectional drawing of a dust collection part equally. Similarly, it is a side view of a filter assembly. It is a top view of a filter assembly similarly. It is YY sectional drawing of a filter assembly similarly. It is a top view of the primary filter object which constitutes the filter assembly equally. It is ZZ sectional drawing of a primary and 1st-order filter body similarly. It is explanatory drawing of the airflow which distribute | circulates a filter assembly similarly.

  Hereinafter, an embodiment of the present invention will be described based on FIGS. 1 to 8. In the following description, upper and lower sides of the present embodiment will be defined with reference to FIG.

  1 is a vertical vacuum cleaner of the present invention. The electric vacuum cleaner 1 is detachably mounted to the lower end of the vacuum cleaner main body 2, the dust collecting portion 3 detachably mounted in a bayonet type below the vacuum cleaner main body 2, and the lower end of the dust collecting portion 3. It has an extension pipe 4 and a nozzle 5 detachably attached to the lower end of the extension pipe 4. The nozzle 5 can also be attached to the lower end of the dust collection unit 3 without the extension pipe 4.

  The vacuum cleaner main body 2 has a handle 6 at its upper portion, and the switch operating portion 7 is provided on the handle 6. Further, at the end of the handle 6, a loop cord 8 for hooking the vacuum cleaner 1 to a hook or the like when not in use is provided. Furthermore, in the cleaner body 2, an electric blower, a secondary battery, and a control circuit (not shown) are accommodated. Reference numeral 9 denotes a charging connector for supplying power to the secondary battery.

  The dust collection unit 3 includes a dust collection container 10, a connection pipe portion 11, a filter attachment portion 12, a filter assembly 13, a check valve portion 14, and a buffer portion 15. The dust collection container 10 and the connection pipe portion 11 are integrally formed of synthetic resin. Further, the connection pipe portion 11 is provided below the dust collection container 10. The upper end of the dust collection container 10 has an upper end opening 16. Further, the lower end of the connection pipe portion 11 also has a lower end opening 17. Furthermore, a connection point between the bottom of the dust collection container 10 and the upper end of the connection pipe portion 11 has an intermediate opening 18. Accordingly, air flow can flow from the lower end opening 17 of the connection pipe 11 through the intermediate opening 18 to the upper opening 16 of the dust collection container 10. And the non-return valve part 14 is attached so that the said intermediate | middle opening part 18 may be closed. The check valve portion 14 has a mounting seat 19 fixed to the dust collection container 10 and the connection pipe portion 11, and a check valve 20 made of a flexible material mounted on the mounting seat 19. Further, a mounting portion 21 is provided at the lower rear of the dust collection container 10, and the mounting portion 21 is provided with a shock absorber 22 made of a material having rubber elasticity such as an elastomer and being hard to slip. Then, the buffer unit 15 is configured by the buffer 22. Further, the filter attachment portion 12 is attached to the upper end opening 16 of the dust collection container 10. The filter mounting portion 12 has a cylindrical portion 23 and a conical portion 24 provided below the cylindrical portion 23. Furthermore, the filter assembly 13 is detachably mounted on the cylindrical portion 23 of the filter mounting portion 12.

  The filter assembly 13 will be described in detail. The filter assembly 13 is configured to include a primary filter body 25 and a secondary filter body 26. The primary filter body 25 is detachably attached to the secondary filter body 26 in a bayonet manner.

  The primary filter body 25 is configured to have a cylindrical main body 27 and a net-like primary filter 28. The cylindrical main body 27 has a bottom and a plurality of windows formed on the side. These windows consist of an upper stage window 29 formed to be rotationally symmetrical along the circumferential direction and a lower window 30 similarly formed rotationally symmetrical along the circumferential direction. In the present embodiment, the upper window portion 29 is formed at four places in the circumferential direction, and similarly, the lower window portion 30 is formed at four places in the circumferential direction. And, between the windows, a columnar body 31 and an annular body 32 are provided so as to be rotationally symmetrical. That is, in the present embodiment, four columnar bodies 31 are formed, and the annular body 32 is formed so as to connect substantially the centers of the four columnar bodies 31 in the circumferential direction. A window is not provided at the bottom of the cylindrical main body 27. Then, the primary filter 28 is stretched on the upper stage window 29 and the lower stage window 30, respectively. Further, on the inner side of each columnar body 31, reinforcing ribs 33 are formed so as to be rotationally symmetrical. Furthermore, a plate-like bottom rib 34 is formed so as to connect the lower ends of these reinforcing ribs 33. The bottom rib 34 is formed from the lower end of each reinforcing rib 33 toward the center of the bottom of the cylindrical main body 27. That is, in the present embodiment, the bottom rib 34 crosses at the center of the bottom of the cylindrical main body 27 in a cross shape. Further, the upper edge 34T of the bottom rib 34 is formed at a position above the lower edge 30B of the lower window portion 30. Further, the projections 35 are formed so as to be rotationally symmetrical projecting upward from the central intersection of the bottom rib 34. The projections 35 are formed by intersecting the plate-like members 36 in a cross shape, similarly to the bottom rib 34. Also, the protrusion 35 is formed to be thinner toward the upper side. And between the plate-like members 36 adjacent to each other in the projection 35, a concave groove 37 which is a V-shaped concave portion having a bottom angle of 90 degrees is formed, and this concave groove 37 becomes an air passage 38 . Furthermore, two mounting grooves 39 are formed in the upper portion of the side wall of the cylindrical main body 27 so as to be axially symmetrical. That is, in the present embodiment, the cylindrical main body 27 and hence the primary filter body 25 are formed so as to be symmetrical twice as a whole.

  As described above, in the primary filter body 25, the windows 29 and 30 are formed only on the side surface of the cylindrical main body 27, and the windows are not formed on the bottom thereof. Therefore, the primary filter 28 is formed only on the side surface of the primary filter body 25. With such a structure, the mesh sheet constituting the primary filter 28 may be set in a molding die in a state of being wound in a cylindrical shape, and the cylindrical main body 27 may be molded. The primary filter body 25 can be formed.

  The secondary filter body 26 has a short cylindrical portion 40 open at both ends, a flange portion 41 formed outside from the upper end of the short cylindrical portion 40, and a step portion 42 provided at the lower end of the short cylindrical portion 40. A support 43 formed extending downward from the stepped portion 42, a flexible bag-like secondary filter 44 fixed to the upper portion of the support 43, and a seal member 45. Configured The short cylindrical portion 40, the flange portion 41, the step portion 42, and the support 43 are integrally molded of synthetic resin. Further, the diameter of the support 43 is formed smaller than the diameter of the short cylindrical portion 40 by the step portion 42. A finger hook 46 is formed inside the upper portion of the support 43. The flange portion 41 is formed in a substantially circular shape. An annular ridge 47 is formed on the outer surface of the short cylindrical portion 40 and below the flange 41 at a predetermined distance from the flange 41. A recessed groove 48 is formed by the upper surface of the protruding portion 47, the outer surface of the short cylindrical portion 40, and the lower surface of the flange portion 41, and the sealing member 45 is attached to the recessed groove 48. When the filter assembly 13 is inserted into the cylindrical portion 23 of the filter mounting portion 12, the seal member 45 is configured such that the outer peripheral portion is in close contact with the inner surface of the cylindrical portion 23. When the primary filter body 25 is attached to the secondary filter body 26, the lower surface of the protrusion 47 acts to align the upper end of the primary filter body 25. Further, the support 43 is formed in a truncated cone shape as a whole by a plurality of columnar bodies 49 and an upper annular portion 50 and a lower annular body 51 connecting the columnar bodies 49 with each other in a C shape in plan view. The air flow can flow through the columns 49 and the insides of the annular members 50 and 51. Reinforcing ribs 52 are formed on the inner side of the columns 49, respectively. Further, the secondary filter 44 covers the support 43 from the outside, and the open end 44 A is fixed in the vicinity of the upper end portion of the support 43. On the other hand, the closed end 44 B side of the secondary filter 44 is folded back to the inside of the support 43 through the lower annular body 51 so as to turn it over. The secondary filter 44 thus folded back is supported by the support 43. The closed end 44B of the secondary filter 44 can be pushed into the support 43 until the folded portion 44C of the secondary filter 44 abuts on the lower annular body 51. Furthermore, a pair of engagement protrusions 53 is formed on the stepped portion 42 of the secondary filter body 26 so as to protrude outward. These engagement protrusions 53 are provided so as to be axially symmetrical with respect to the center of the secondary filter body 26. When the primary filter body 25 is attached to the secondary filter body 26, the engagement protrusions 53 engage with the attachment groove 39.

  When the attachment groove 39 and the engagement projection 53 are engaged to couple the primary filter body 25 and the secondary filter body 26, the projection 35 of the primary filter body 25 is the secondary filter body. The lower annular body 51 enters the inside of the support 33. As a result, the protrusion 35 enters the inside of the closed end 44 B side of the secondary filter 44 folded back inward from the lower annular body 51. Then, the closed end 44 B side of the secondary filter 44 is supported by the projection 35. The lowest position of the folded portion 44C, which is the lower end of the secondary filter 44, is approximately the same height as the upper edge 34T of the bottom rib 34. Further, the highest position of the folded portion 44 C of the secondary filter 44 is the same height as the lower annular body 51 of the support 43. (In fact, the thickness of the secondary filter 44 itself is lower than the height of the lower annular body 51.) In any of these cases, the height of the folded portion 44C which is the lower end of the secondary filter 44 Is higher than the lower edge 30 B of the lower window 30.

  Next, the operation of the present embodiment will be described. First, before using the vacuum cleaner 1, the user connects a power cord (not shown) to the charging connector 10 to charge the secondary battery in the vacuum cleaner body 2. As described above, when the vacuum cleaner 1 is not in use, the loop cord 8 attached to the tip of the handle 6 of the vacuum cleaner 1 is hooked on a hook attached to a wall of a house or the like. . By doing this, the vacuum cleaner 1 can be prevented from getting in the way. In addition, when the loop cord 8 is hooked on the hook in this manner, the lower rear portion of the dust collection container 10 of the dust collection unit 3 hits the wall due to the weight balance of the vacuum cleaner 1. However, by providing the buffer portion 15 at this position, even if the dust collection container 10 collides with a wall or the like, the shock absorber 22 of the buffer portion 15 absorbs the shock, so that the dust collection container 10, As a result, it is possible to suppress that the vacuum cleaner 1 breaks down due to an impact. Conversely, the shock absorber 22 absorbs the impact of the collision of the vacuum cleaner 1, so that damage to the wall or the like can be suppressed. Further, since the shock absorber 22 is made of a non-slippery material such as an elastomer, the electric vacuum cleaner 1 can be prevented from shaking and rubbing in a state of being hooked to a hook or the like, and the wall or the like can be hardly scratched.

  When using the charged vacuum cleaner 1, the user removes the loop cord 8 from a hook or the like, holds the handle 6, and operates the switch operation unit 7 to supply from the secondary battery The electric power supplied operates the electric blower to generate suction air flow. The suction air flow becomes a dust-containing air flow, and is drawn into the dust collection unit 3 from the nozzle 5 through the extension pipe 4. Then, in the dust collection unit 3, dust contained in the dust-containing air stream is separated from the air stream by the filter assembly 13. Then, the air flow from which dust is removed passes through the filter assembly 13 and is then released from the cleaner body 2 to the outside. On the other hand, the dust filtered by the filter assembly 13 is stored in the dust collection unit 3. Since the check valve portion 14 is provided at the intermediate opening 18 of the dust collection container 10, the dust stored in the dust collection portion 3 does not flow back to the nozzle 5 side.

  The dust filtration by the filter assembly 13 will be described in detail. In addition, dust-containing air flows from the lower nozzle 5 to the cleaner main body 2 above. That is, an air flow flows from the lower end opening 17 of the connection pipe portion 11 in FIG. 8 to the short cylindrical portion 40 of the secondary filter body 26 of the filter assembly 13. First, the dust-containing gas stream flows into the dust collection container 10 after passing through the check valve portion 14 from the connection pipe portion 11. Then, the dust-containing air flow that has flowed into the dust collection container 10 passes through the primary filter 28 of the primary filter body 25. At this time, coarse dust contained in the dust-containing air stream is captured by the primary filter 28. Then, the dust-containing air flow that has passed through the primary filter 28 passes through the secondary filter 44 of the secondary filter body 26. At this time, fine dust contained in the dust-containing gas flow is captured by the secondary filter 44. Then, the air flow that has passed through the secondary filter 44 and becomes clean passes through the short cylindrical portion 40 of the secondary filter body 26 and is sucked by the electric blower, and then from the exhaust port of the cleaner body 2 Exhausted.

  As shown in FIG. 8, the main flow of the air flow passing through the filter assembly 13 is the air flow Fm. The air flow Fm is an air flow passing from the opening end 44A of the secondary filter 44 to the folding portion 44C after passing through the primary filter 28 provided in the upper stage window portion 29 and the lower stage window portion 30. . On the other hand, after passing through the primary filter 28 provided at the lower part of the lower window portion 30 in addition to the air flow Fm, the air flow which flows from the folded portion 44C which is the lower end of the secondary filter 44 toward the closed end 44B. Fu is also formed. The dust contained in the air flow Fm is captured in the range from the open end 44A of the secondary filter 44 to the folded portion 44C. On the other hand, dust contained in the air flow Fu is captured in a range from the folded portion 44C of the secondary filter 44 to the closed end 44B. As described above, since the folded back portion 44C, which is the lower end of the secondary filter 44, is above the lower edge 30B of the lower window portion 30, the air flow Fu between the folded back portion 44C and the lower edge 30B is It becomes a passage of. For this reason, dust can be reliably captured in the range from the folded portion 44C to the closed end 44B. That is, since dust can be effectively captured using the entire secondary filter 44, clogging can be suppressed. Further, since the projection 35 itself has the air passage 38 composed of the recessed groove 37, the air flow Fu flows through the air passage 38. Therefore, an appropriate distance can be formed between the protrusion 35 and the secondary filter 44, and the air flow Fu can be reliably sent to the range from the folded portion 44C to the closed end 44B. Since the air passage 38 is the concave groove 37, the open side of the concave groove 37 faces the range from the folded portion 44C of the secondary filter 44 to the closed end 44B. Therefore, the air flow Fu can pass through the secondary filter 44 in a wide range from the folded portion 44C to the closed end 44B. For this reason, dust can be captured by effectively utilizing the area from the folded portion 44C of the secondary filter 44 to the closed end 44B. Furthermore, since the concave groove 37 itself is formed by intersecting the plate-like members 36 in a cross shape, not only can the projection 35 having the air passage 38 be formed with a simple structure, but also the concave The open side of the groove 37 can be widely opened. Therefore, dust can be captured by more effectively utilizing the area from the folded portion 44C of the secondary filter 44 to the closed end 44B.

  As described above, the electric vacuum cleaner 1 of the present invention includes the vacuum cleaner main body 2 in which the electric blower is incorporated, the dust collection container 3 detachably attached to the vacuum cleaner main body 2, and the dust collection container 3. Primary filter body 25 detachably mounted on the side and provided with primary filter 28 on the side, and bag-shaped secondary filter 44 detachably mounted on the downstream side of primary filter body 25 and having flexibility. And the secondary filter body 26 is provided with a support 43 for supporting the secondary filter 44, and the closed end 44B of the secondary filter 44 is the support 43. And a protrusion 35 is provided at the center of the primary filter body 28 so as to project and extend to the secondary filter 44 side. In the vacuum cleaner where the projection 35 is inserted inside the support 43 when the filter body 26 is attached, when the downstream side of the air flow in the secondary filter body 26 is the upper side, the primary filter body 25 A bottom rib 34 having an upper edge 34T at the upper end thereof above the lower edge 30B of the lower window 30 at the lower end of the primary filter 28 is formed at the bottom of the By forming the projections 35, the air flow Fm sucked from the upper part of the primary filter 28 provided on the side surface of the primary filter body 25 is folded from the opening end 44A on the base end side of the secondary filter 44. The air flow Fu which passes through the range to 44 C and is sucked from the lower part of the primary filter 28 passes from the folded part 44 C of the secondary filter 44 to the closed end 44 B. Since passing through a range of only in one in which it is possible to improve the dust collecting performance by trapping fine dust across the secondary filter 44.

  Further, in the electric vacuum cleaner 1 of the present invention, since the projection 35 has the concave groove 37 as a concave portion constituting the air passage 38, the air flow Fu sucked from the lower portion of the primary filter 28 is reliably made the secondary filter It can be sent to the range from the turnup 44C of 44 to the closed end 44B.

  Further, in the electric vacuum cleaner 1 of the present invention, the projections 35 are formed by intersecting the plate members 36, and the air passages are formed between the plate members 36, so the air passage 38 has a simple structure. Not only can the projections 35 be formed, but the concaves to be formed become concave grooves 37, and the open side of the concave grooves 37 opposes the range from the folded portion 44C of the secondary filter 44 to the closed end 44B. Therefore, since the air flow Fu can pass through the secondary filter 44 in a wide range from the turnback portion 44C to the closed end 44B, and further, the open side of the concave groove 37 can be widely opened, The area of the secondary filter 44 can be used more effectively to capture dust.

  The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the invention. For example, although the said embodiment is a filter type vacuum cleaner, it is also possible to apply to a cyclone type vacuum cleaner. Moreover, although the said embodiment is a stick type vacuum cleaner, it is also possible to apply to a horizontal type vacuum cleaner. Furthermore, it is also possible to apply to what has a dust collection part sideways. Also in this case, the downstream side of the air flow is defined as the upper side.

DESCRIPTION OF SYMBOLS 1 electric vacuum cleaner 2 vacuum cleaner main body 3 dust collection part 10 dust collection container 13 filter assembly 25 primary filter body 26 secondary filter body 27 cylindrical main body 28 primary filter 30 lower window part 30B lower edge 34 bottom rib 34T upper edge 35 Protrusions 36 Plate-like members 37 Recesses (recesses)
38 air passage 43 support 44 secondary filter 44A open end 44B closed end 44C folded portion 51 lower annular body Fu air flow

Claims (3)

A vacuum cleaner body incorporating an electric blower, a dust collection container detachably attached to the vacuum cleaner body, a primary filter detachably attached to the dust collection container and provided with a primary filter on a side surface And a secondary filter body detachably mounted on the downstream side of the primary filter body and provided with a flexible bag-like secondary filter, wherein the secondary filter body comprises: A support for supporting the filter is provided, the closed end of the secondary filter is folded back to the inside of the support, and a central portion of the primary filter body is provided with a projection extending toward the secondary filter. A vacuum cleaner wherein the projection is inserted inside the support when the secondary filter body is attached to the primary filter body.
When the downstream side of the air flow in the secondary filter body is the upper side, the bottom of the primary filter body is formed with a bottom rib whose upper end is above the lower end of the primary filter, and the center of the bottom rib The vacuum cleaner is characterized in that the projection is formed on the   The vacuum cleaner according to claim 1, wherein the projection has a recess which constitutes an air passage.   The vacuum cleaner according to claim 2, wherein the projections are formed by intersecting plate-like members, and an air passage is formed between the plate-like members.

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