Dust collecting apparatus using dust bag

Abstract

To provide a dust collector using a dust collecting bag capable of suppressing the flow of an air current to a path other than a desired path.SOLUTION: A dust collecting bag 30 having a bag-like body 31 capable of storing dust and a port plate part 32 is detachably provided in a dust collecting part 18, and the port plate part 32 has a port plate body part 33 and a slidable shielding plate 34. The dead plate main body portion 33 has a front plate 35 having a through-hole 39, a rear plate 36 having a through-hole 40, and a spacer plate 37,38 forming a predetermined interval therebetween, the shielding plate 34 has a shielding plate main body 41 in which a through-hole 45 and a shielding portion 46 are formed and a knob portion 44, and the knob portion 44 has a sealing piece 49 and a spacer piece 48 forming a predetermined interval between the knob portion 44 and the shielding plate main body 41, in the state of setting the dust collecting bag 30 to the dust collecting part 18, the lower part of the sealing piece 49 is overlapped with the upper end part of the rear plate 36 and the sealing piece 49 is pressed to the rear plate 36 by the pressing body 28 so that air flow leakage is suppressed.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a dust collecting device such as an electric vacuum cleaner that uses a dust collecting bag. [Background technology]

[0002] Conventionally, as a dust collecting device using this type of dust bag, there is known a vacuum cleaner using a dust bag that includes a paper bag portion (corresponding to the bag-shaped body of the present invention) formed into a bag shape from breathable filter paper or the like for collecting dust, and a locking piece (corresponding to the mouth plate of the present invention) formed from cardboard or the like and fixed to the entrance of the paper bag portion and having a dust suction port (see, for example, Patent Document 1).Also known is a dust bag for a vacuum cleaner that includes a bag-shaped body formed from breathable filter paper or the like for collecting dust, a support plate (corresponding to the mouth plate main body of the present invention) formed from cardboard or the like and fixed to the suction port of the bag-shaped body and having a dust suction port, and a shielding plate that prevents dust from spilling out of the suction port of the bag-shaped body (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 56-028733 [Patent Document 2] Japanese Patent Application Publication No. 07-100086 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with the structure of Patent Document 1, there is a risk that dust will spill from the dust suction port of the paper bag when the paper bag containing the accumulated dust is discarded. The structure of Patent Document 2 overcomes the drawbacks of Patent Document 1, but there is a risk that part of the suction airflow passes through a gap between the support plate and the shielding plate, and at this time, fine dust carried by the suction airflow may also pass through the gap. This is because, in the structure of Patent Document 2, the support plate and the shielding plate are stacked together, resulting in three layers of cardboard, and the thickness of the cardboard constituting the shielding plate is thinner than in the structure of Patent Document 1. As a result, the shielding plate in the structure of Patent Document 2 is prone to deformation, and gaps are formed between the shielding plates or between the shielding plate and the support plate, which may result in fine dust passing through the gap along with the airflow, as described above. As described in the third embodiment of Patent Document 2, by gluing the top of the shielding plate and the top of the support plate together, it is possible to prevent gaps from occurring, but this is not sufficient to prevent airflow leakage. Furthermore, since the handle portion must be detached from the top of the support plate in order to block the dust suction port, there is a risk of dust leaking when the user holds the dust bag and detaches the handle portion.

[0005] SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and to provide a dust collecting device using a dust collecting bag that can prevent airflow from flowing in any direction other than the desired path and reliably collect dust. [Means for solving the problem]

[0006] A dust collecting device using a dust collecting bag according to claim 1 of the present invention comprises a dust collecting section and a dust collecting bag detachable from the dust collecting section, the dust collecting bag having a breathable bag-like body capable of storing filtered dust therein and a mouth plate attached to the bag-like body, the mouth plate having a mouth plate main body and a shielding plate provided slidably relative to the mouth plate main body, the mouth plate main body having a front plate having a through hole, a rear plate having a through hole, and a spacer plate forming a predetermined gap between the front plate and the rear plate, the shielding plate being provided between the front plate and the rear plate The shielding plate has a shielding plate body and a gripping portion, in which a through hole corresponding to the through hole of the mouth plate body portion and a shielding portion are formed, and a slip-out prevention structure is provided between the mouth plate body portion and the shielding plate, and the gripping portion has a sealing piece and a spacer piece that forms a predetermined gap between the sealing piece and the shielding plate body, and is configured so that the sealing piece overlaps the end of the mouth plate body portion when the shielding plate is in the lowest position, and has a pressing body that abuts against the sealing piece and presses the shielding plate toward the shielding plate body when the dust collection bag is attached to the dust collection portion.

[0007] In addition, the dust collecting device using the dust collecting bag described in claim 2 of the present invention is characterized in that, in claim 1, the edge of the spacer piece on the side of the mouth plate main body is straight and perpendicular to the sliding direction of the shielding plate, and the edge of the spacer piece on the side of the mouth plate main body is straight and perpendicular to the sliding direction of the shielding plate.

[0008] In addition, the dust collecting device using the dust collecting bag described in claim 3 of the present invention is characterized in that, in claim 2, an auxiliary piece is provided on the side opposite the spacer of the shielding plate main body, and the edge of this auxiliary piece on the side of the mouth plate main body is straight and perpendicular to the sliding direction of the shielding plate, and the edge of the auxiliary piece on the side of the mouth plate main body is straight and perpendicular to the sliding direction of the shielding plate.

[0009] In addition, the dust collecting device using the dust collecting bag described in claim 4 of the present invention is characterized in that, in claim 3, when the shielding plate is in the lowest position, the edge of the spacer piece on the side of the mouth plate main body abuts against the edge of the spacer piece on the side of one of the front plate or rear plate, and the edge of the auxiliary piece on the side of the mouth plate main body abuts against the edge of the auxiliary piece on the other of the front plate or rear plate.

[0010] Furthermore, the dust collecting device using the dust collecting bag described in claim 5 of the present invention is characterized in that, in claim 1, the thickness of the spacer piece is the same as or slightly thicker than the thickness of one of the front or rear plates on the spacer piece side, the thickness of the shielding plate main body is the same as or slightly thinner than the thickness of the spacer plate, and the sum of the thicknesses of the shielding plate main body and the spacer piece is the same as or slightly greater than the sum of the thickness of the spacer plate and one of the front or rear plates on the spacer piece side. [Effects of the Invention]

[0011] By configuring the dust collection device using the dust collection bag described in claim 1 of the present invention as described above, the sealing piece is pressed against either the front plate or the rear plate of the mouth plate main body portion when pressed by the pressing body, thereby suppressing airflow leakage.

[0012] Furthermore, by making the edge of the spacer piece on the side of the mouth plate main body straight and perpendicular to the sliding direction of the shielding plate, and by making the edge of the spacer piece on the side of the mouth plate main body straight and perpendicular to the sliding direction of the shielding plate, the spacer piece and the mouth plate main body abut against each other, preventing gaps from occurring between them and suppressing air leakage.

[0013] In addition, an auxiliary piece is provided on the side opposite the spacer on the shielding plate body, and the edge of this auxiliary piece on the side of the mouth plate body is made straight and perpendicular to the sliding direction of the shielding plate, and the edge of the auxiliary piece on the side of the mouth plate body is made straight and perpendicular to the sliding direction of the shielding plate, so that the auxiliary piece and the mouth plate body abut against each other, preventing gaps from occurring between them and suppressing air leakage.

[0014] Furthermore, by configuring the spacer piece so that, when the shielding plate is in the lowest position, the side edge of the mouth plate main body abuts against the side edge of the spacer piece of one of the front or rear plates, and the side edge of the mouth plate main body of the auxiliary piece abuts against the side edge of the auxiliary piece of the other of the front or rear plates, air leakage can be more reliably suppressed.

[0015] Furthermore, by making the thickness of the spacer piece the same as or slightly thicker than the thickness of one of the front or rear plates on the spacer piece side, making the thickness of the shielding plate main body the same as or slightly thinner than the thickness of the spacer plate, and making the sum of the thicknesses of the shielding plate main body and the spacer piece the same as or slightly greater than the sum of the thicknesses of the spacer plate and one of the front or rear plates on the spacer piece side, when pressed by the pressing body, the sealing piece is pressed against one of the front or rear plates of the mouth plate main body part, and the upper part of the shielding plate main body is pressed against the other of the front or rear plates of the mouth plate main body part, not only can air leakage be more reliably suppressed, but the gripping portion can also be easily pulled out with light force by pinching it with fingers, and the through hole of the mouth plate main body part can be blocked by the shielding portion. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is an overall view of an electric vacuum cleaner set as a dust collecting device using a dust bag, showing one embodiment of the present invention. [Figure 2] FIG. [Figure 3] FIG. [Figure 4] FIG. 2 is a cross-sectional view of the dust collection bag taken along line XX of the same. [Figure 5] FIG. [Figure 6] FIG. 10 is an enlarged view of the main part when set in the second dust collecting section. [Figure 7] XX cross-sectional view of the dust bag in the state where the shielding plate is pulled up. DETAILED DESCRIPTION OF THE INVENTION

[0017] An embodiment of the present invention will be described below with reference to Figures 1 to 7. Reference numeral 1 denotes a vacuum cleaner set serving as a dust collecting device. This vacuum cleaner set 1 comprises a vacuum cleaner 2 and a docking station 3.

[0018] The electric vacuum cleaner 2 has a cleaner body 4, a suction nozzle 5, and a handle 6. The cleaner body 4 has a first dust collecting unit 7, a first electric blower 8, a secondary battery 9, a main circuit board 10, and power receiving terminals 11, 11. The first electric blower 8 generates a suction airflow, which sucks dust through the suction nozzle 5. The first dust collecting unit 7 collects the dust sucked through the suction nozzle 5. Furthermore, a first control circuit 12 is provided on the main circuit board 10 to control the operation of the first electric blower 8 and to control the charging of the secondary battery 9. In this embodiment, the first dust collecting unit 7 is built into the cleaner body 4, but it may be detachable from the cleaner body 4. The first dust collecting unit 7 may be a filter type or a cyclone type. The vacuum cleaner body 4 is provided with a dust discharge port 13 that communicates with the first dust collecting unit 7 and that discharges dust accumulated in the first dust collecting unit 7 to the outside. Note that the dust discharge port 13 is closed by a cover (not shown) when the vacuum cleaner is removed from the docking station 3. The suction nozzle 5 is connected to the first dust collecting unit 7 by an air intake path (not shown). Furthermore, the handle 6 is provided with an operation unit board 14, and an operation unit 15 is provided on this operation unit board 14. The first electric blower 8, secondary battery 9, power receiving terminals 11, 11, and operation unit board 14 are electrically connected to the main circuit board 10.

[0019] The docking station 3 includes a station main body 16 and a station base 17. The station main body 16 includes a second dust collecting unit 18, a second electric blower 19, a power line 21 with a power plug 20 at its end, a circuit board 22, and power supply terminals 23, 23. The second electric blower 19 generates a suction airflow. The second dust collecting unit 18 collects dust in the first dust collecting unit 7 that is moved by the suction airflow generated by the second electric blower 19. A second control circuit 24 for controlling the operation of the second electric blower 19, a switch 25, and an LED 26 as a display unit are provided on the circuit board 22. In this embodiment, the second dust collecting unit 18 is built into the station main body 16, but it may be detachable from the station main body 16. The dust collecting capacity of the second dust collecting unit 18 is greater than that of the first dust collecting unit 7. Furthermore, a dust collection bag 30 is removably built into the second dust collection section 18. Details of the dust collection bag 30 will be described later. The station main body 16 is provided with a suction port 27 that communicates with the second dust collection section 18. The second dust collection section 18 is provided with a door (not shown) that can be opened and closed, and is provided with a pressing body 28 that abuts against and presses a sealing piece 49 (described later) from behind when the dust collection bag 30 (described later) is set in the second dust collection section 18 and the door is closed.

[0020] The power supply terminals 23, 23 and the power receiving terminals 11, 11 are respectively provided at positions where they are electrically connected only when the suction nozzle 5 of the vacuum cleaner 2 is placed on the station base 17 and the dust discharge port 13 is connected to the suction port 27. That is, when the second control circuit 24 detects that the power supply terminals 23, 23 and the power receiving terminals 11, 11 are electrically connected, it can be determined that the dust discharge port 13 and the suction port 27 are connected to each other. Note that the lid that closes the dust discharge port 13 may be opened mechanically by attaching the vacuum cleaner 2 to the docking station 3, or may be opened by the airflow generated by the second electric blower 19.

[0021] The dust collection bag 30 will now be described in detail. The up, down, left, and right directions in FIG. 3 are defined as the actual up, down, left, and right directions. To facilitate understanding of the structure, the thickness of the mouth plate portion 32 (shielding plate 34, front plate 35, and rear plate 36) described below is emphasized in FIGS. 4 to 6 . The dust collection bag 30 is comprised of a bag-shaped body 31 and the mouth plate portion 32. The bag-shaped body 31 is made of paper or nonwoven fabric, and is therefore breathable, capable of filtering dust in the airflow and storing the filtered dust therein. The mouth plate portion 32 is comprised of a mouth plate main body portion 33 and a shielding plate 34 made of cardboard or the like. The mouth plate main body portion 33 is comprised of a front plate 35, a rear plate 36, and spacer plates 37 and 38. In this embodiment, the front plate 35 and the rear plate 36 are formed by folding a single piece of cardboard, but they may also be provided separately. The upper edges of the front plate 35 and the rear plate 36 are horizontal and linear, and are at the same height. Circular through-holes 39 and 40 are formed in the front plate 35 and the rear plate 36, respectively. The through-holes 39 and 40 are coaxial and have the same diameter. The spacer plates 37 and 38 are bonded between the front plate 35 and the rear plate 36 and on the left and right sides of the through-holes 39 and 40. This forms a gap between the front plate 35 and the rear plate 36, equivalent to the thickness of the spacer plates 37 and 38. This gap opens at the top of the mouth plate main body 33. The spacer plates 37 and 38 each have a first portion 37a, 38a formed at the top, a second portion 37b, 38b formed at the bottom, and a step portion 37c, 38c formed between the first portion 37a, 38a and the second portion 37b, 38b. The distance between the first portions 37a, 38a is narrower than the distance between the second portions 37b, 38b.

[0022] The shielding plate 34 is disposed between the front plate 35 and rear plate 36 of the main panel 33 and between the spacer plates 37 and 38 so as to be vertically slidable. That is, the upper edges of the front plate 35 and the rear plate 36 are perpendicular to the sliding direction of the shielding plate 34. The thickness of the cardboard forming the shielding plate 34 is the same as or slightly thinner than the thickness of the cardboard forming the spacer plates 37 and 38, i.e., the distance between the front plate 35 and the rear plate 36. The shielding plate 34 comprises a shielding plate main body 41, protrusions 42 and 43 formed on the left and right sides of the lower end of the shielding plate main body 41, and a knob 44 provided at the upper end of the shielding plate main body 41. A circular through-hole 45 is also formed in the shielding plate main body 41, corresponding to the through-hole 39 in the front plate 35 and the through-hole 40 in the rear plate 36. The diameter of the through hole 45 of the shielding plate main body 41 is the same as or slightly larger than the diameter of the through hole 39 of the front plate 35 and the diameter of the through hole 40 of the rear plate 36. As shown in FIG. 3 , when the shielding plate 34 is in the lowest position, the through hole 45 is substantially coaxial with the through holes 39 and 40. A shielding portion 46 is formed below the through hole 45 of the shielding plate main body 41. The width of the shielding plate main body 41 in the left-right direction is the same as or slightly narrower than the distance between the first portions 37a and 38a of the spacer plates 37 and 38. The width from the right end of the protrusion 42 to the left end of the protrusion 43 is sufficiently wider than the distance between the first portions 37a and 38a and is the same as or slightly narrower than the distance between the second portions 37b and 38b. Therefore, the shielding plate 34 is at its highest position when the upper edges 42a, 43a of the protrusions 42, 43 abut against the stepped portions 37c, 38c, and the protrusions 42, 43 and the stepped portions 37c, 38c form a retaining structure 47. When the shielding plate 34 is at its highest position, it closes the through-hole 39 of the front plate 35 and the through-hole 40 of the rear plate 36.

[0023] The gripping portion 44 is configured to include an upper end portion 41a of the shielding plate main body 41, a rectangular spacer piece 48, a similarly rectangular sealing piece 49, and a similarly rectangular auxiliary piece 50. The spacer piece 48 is attached to the rear surface of the upper end portion 41a of the shielding plate main body 41 by adhesive or the like. The sealing piece 49 is attached to the rear surface of the spacer piece 48 by adhesive or the like. The auxiliary piece 50 is attached to the front surface of the upper end portion 41a of the shielding plate main body 41 by adhesive or the like. The upper end portion 41a of the shielding plate main body 41, the spacer piece 48, and the auxiliary piece 50 have the same left-right dimension L1, and their left and right edges are aligned. The spacer piece 48 and the auxiliary piece 50 also have the same vertical dimension, and their upper edges are aligned with the upper edge of the upper end portion 41a of the shielding plate main body 41. Therefore, the linear lower edge of the spacer piece 48 and the linear lower edge of the auxiliary piece 50 are aligned in height. Therefore, when the shielding plate 34 is in its lowest position, the linear lower edge of the spacer piece 48 and the linear lower edge of the auxiliary piece 50 are perpendicular to the sliding direction of the shielding plate 34 and simultaneously abut against the linear upper edge of the rear plate 36 and the linear upper edge of the front plate 35, respectively. The spacer piece 48 and the sealing piece 49 have the same left-right dimension L1, and their left-right edges coincide. Meanwhile, the vertical dimension of the sealing piece 49 is longer than that of the spacer piece 48, and their upper edges coincide. Therefore, the linear lower edge of the sealing piece 49 is lower than the linear lower edge of the spacer piece 48. The thickness of the cardboard forming the spacer piece 48 is the same as or slightly thicker than the thickness of the cardboard forming the rear plate 36. The thickness of the cardboard forming the shielding plate main body 41 is the same as or slightly thinner than the thickness of the cardboard forming the spacer plates 37 and 38. Furthermore, the sum of the thickness of the cardboard constituting the shielding plate main body 41 and the thickness of the cardboard constituting the spacer piece 48 is the same as or slightly greater than the sum of the thickness of the cardboard constituting the spacer plates 37, 38 and the thickness of the cardboard constituting the rear plate 36. Therefore, when the shielding plate 34 is in the lowest position, the lower part of the sealing piece 49 overlaps with the upper end of the rear plate 36 behind the rear plate. The thickness of the cardboard constituting the auxiliary piece 50 is the same as the thickness of the cardboard constituting the front plate 35.Here, "cardboard of the same thickness" means "same thickness according to the standard," and it is clear that there is a margin of error within the tolerance range. Furthermore, the left-right dimension L1 is greater than the distance L2 between the first portions 37a, 38a of the spacer plates 37, 38. More specifically, if the left-right dimension of the portion of the shielding plate main body 41 located between the first portions 37a, 38a is L3, the upper end portion 41a, spacer piece 48, sealing piece 49, and auxiliary piece 50 protrude from the left and right ends of the portion of the shielding plate main body 41 by at least the dimension (L2 - L3). Since L2 > L3, gaps Gc, Gd are formed between the shielding plate main body 41 and the spacer plates 37, 38, respectively. The upper end openings of the gaps Gc, Gd are blocked by the protruding portions of the upper end portion 41a, spacer piece 48, and auxiliary piece 50.

[0024] Next, the operation of this embodiment will be described. It is assumed that the power plug 20 of the docking station 3 is connected to an AC power source. To clean a floor or the like, a user first removes the vacuum cleaner 2 from the docking station 3. Next, the user grips the handle 6 and operates the operating unit 15. By operating the operating unit 15 in this manner, the first control circuit 12 supplies power from the secondary battery 9 to the first electric blower 8. The power supply activates the first electric blower 8 to generate a suction airflow. This suction airflow travels from the suction nozzle 5 through the first dust collecting unit 7 to the first electric blower 8, and is then discharged from the first electric blower 8 to the outside of the vacuum cleaner body 4. By moving the suction nozzle 5 along the floor while the first electric blower 8 is operating, dust on the floor can be sucked in and collected in the first dust collecting unit 7. As described above, the dust discharge port 13 is closed by a lid, so that the suction airflow is not sucked into the first dust collecting section 7 from the dust discharge port 13 .

[0025] When dust accumulates in the first dust collecting section 7 or the charge level of the secondary battery 9 decreases, the user attaches the vacuum cleaner 2 to the docking station 3. At this time, as described above, the power supply terminals 23, 23 are connected to the power receiving terminals 11, 11, and the dust discharge port 13 is communicated with the suction port 27. As a result, the first control circuit 12 supplies the power supplied via the power supply terminals 23, 23 and the power receiving terminals 11, 11 to the secondary battery 9, thereby charging the secondary battery 9.

[0026] When the power supply terminals 23, 23 and the power receiving terminals 11, 11 are electrically connected, the second control circuit 24 enables power supply to the second electric blower 19. The second electric blower 19 can be operated by operating the switch 25. When power is supplied to the second electric blower 19 to operate it, the second electric blower 19 generates a suction airflow that moves dust collected in the first dust collecting unit 7 through the dust outlet 13 and the suction port 27 to the second dust collecting unit 18 and collects it in the dust collection bag 30. After a sufficient time has passed for the dust in the first dust collecting unit 7 to move to the second dust collecting unit 18, the second control circuit 24 stops the power supply to the second electric blower 19 and then turns on the LED 26. That is, when the LED 26 is turned on, the dust in the first dust collecting unit 7 has been moved to the dust collection bag 30 of the second dust collecting unit 18. In this way, the user can know that dust has moved from the first dust collecting unit 7 to the dust collecting bag 30 of the second dust collecting unit 18. When the second control circuit 24 detects that the power receiving terminals 11, 11 have been separated from the power supply terminals 23, 23, that is, when the second control circuit 24 detects that the vacuum cleaner 2 has been removed from the docking station 3, it turns off the LED 26.

[0027] To attach the dust bag 30, a user opens a door (not shown) and inserts the opening 32 into a mounting frame (not shown). Mounting frames for inserting the opening of a dust bag are well known and will not be described here. At this time, with the shielding plate 34 in its lowest position, the through-hole 39 in the front plate 35, the through-hole 40 in the rear plate 36, and the through-hole 45 in the shielding plate 34 are substantially concentric. As shown in FIGS. 5 and 6 , the lower edge of the auxiliary piece 50 abuts against the upper edge of the front plate 35, the lower edge of the spacer piece 48 abuts against the upper edge of the rear plate 36, and the lower part of the sealing piece 49 overlaps with the upper part of the rear plate 36 behind the rear plate 36. 6, the sealing piece 49 is pressed forward by the pressing body 28, whereby the front surface of the sealing piece 49 is pressed against the rear surface of the rear plate 36. As a result, of the gap Ga consisting of a gap G1 formed between the rear surface of the shielding plate main body 41 and the front surface of the rear plate 36, a gap G2 formed between the lower edge of the spacer piece 48 and the upper edge of the rear plate 36, and a gap G3 formed between the front surface of the sealing piece 49 and the rear surface of the rear plate 36, the gap G2 and the gap G3 are closed. Meanwhile, of the gap Gb consisting of a gap G4 formed between the front surface of the shielding plate main body 41 and the rear surface of the front plate 35 and a gap G5 formed between the lower edge of the auxiliary piece 50 and the upper edge of the front plate 35, the gap G5 is closed. Since the sum of the thickness of the spacer plates 37, 38 and the thickness of the rear plate 36 is equal to or slightly smaller than the sum of the thickness of the shielding plate main body 41 and the thickness of the spacer piece 48, when the sealing piece 49 is pressed forward by the pressing body 28, the front surface of the shielding plate main body 41 comes into contact with the rear surface of the front plate 35. This closes the gap G4.

[0028] When the second electric blower 19 is operated with the dust bag 30 set in the second dust collection chamber 18, dust accumulated in the first dust collection unit 7 of the electric vacuum cleaner 2 flows into the dust bag 30 via the suction port 27. At this time, most of the airflow generated by the second electric blower 19 passes through the bag-shaped body 31. The dust contained in this airflow is filtered and accumulated in the bag-shaped body 31. Note that part of the airflow generated by the second electric blower 19 attempts to flow out of the dust bag 30 through the gaps Ga and Gb between the mouth plate main body 33 and the shielding plate 34. However, as described above, gaps G2 and G3 of the gap Ga are blocked, so that the airflow generated by the second electric blower 19 is prevented from passing through the gap Ga. Furthermore, as described above, since the gap Gb is closed, it is possible to prevent the airflow generated by the second electric blower 19 from passing through the gap Gb. As a result, it is possible to prevent the airflow containing dust from flowing out through the gaps Ga and Gb between the mouth plate main body 33 and the shielding plate 34.

[0029] To remove the dust bag 30, the user first opens the door (not shown). This releases the pressure on the sealing piece 49 from the pressing body 28. Then, the user grasps and pulls up the tab 44 with their fingers. At this time, the shielding plate 34 is pulled upward from the main body 33, as shown in FIG. 7 . The upper edges 42a, 43a of the projections 42, 43 of the shielding plate 34 then contact the stepped portions 37c, 38c of the spacer plates 37, 38, stopping the shielding plate 34 from moving relative to the main body 33. This position is the highest position. At this highest position, the shielding portion 46 of the shielding plate 34 closes the through-hole 39 in the front panel 35 and the through-hole 40 in the rear panel 36. When the user further pulls up the tab 44, the entire dust bag 30 is removed from the second dust chamber 18. Furthermore, since the thickness of the spacer pieces 48 is the same as or slightly thicker than the thickness of the rear plate 36, the thickness of the shielding plate main body 41 is the same as or slightly thinner than the thickness of the spacer plates 37, 38, and the sum of the thicknesses of the shielding plate main body 41 and the spacer pieces 48 is the same as or slightly greater than the sum of the thicknesses of the spacer plates 37, 38 and the rear plate 36, the shielding plate 34 does not come into strong contact with the front plate main body 33. Therefore, the shielding plate 34 can be pulled out with a light force by holding the grip portions 44 with fingers. Furthermore, since the left-right dimension L1 is larger than the gap L2, and the upper end portion 41a, spacer piece 48, sealing piece 49, and auxiliary piece 50 protrude from the left and right ends of the portion of the shielding plate main body 41 located between the first portions 37a and 38a by more than the dimension (L2-L3) on the left and right, respectively, the gaps Gc and Gd are blocked by the protruding portions of the upper end portion 41a, spacer piece 48, and auxiliary piece 50, thereby preventing airflow containing dust from escaping from the gaps Gc and Gd.

[0030] As described above, the present invention has a second dust collecting section 18 and a dust collecting bag 30 detachable from the second dust collecting section 18, the dust collecting bag 30 having a breathable bag-like body 31 capable of storing filtered dust therein, and a mouth plate section 32 attached to the bag-like body 31, the mouth plate section 32 having a mouth plate main body 33 and a shielding plate 34 provided slidably relative to the mouth plate main body 33, the mouth plate main body 33 having a front plate 35 having a through hole 39, a rear plate 36 having a through hole 40, and spacer plates 37, 38 forming a predetermined gap between the front plate 35 and the rear plate 36, the shielding plate 34 being provided between the front plate 35 and the rear plate 36 and having a through hole 45 corresponding to the through holes 39, 40 of the mouth plate main body 33 and a shielding plate The second dust collecting section 18 has a shielding plate main body 41 and a gripping portion 44 on which a shielding plate 34 is formed, and a retaining structure 47 is provided between the mouth plate main body 33 and the shielding plate 34, the gripping portion 44 has a sealing piece 49 and a spacer piece 48 that forms a predetermined gap between the sealing piece 49 and the shielding plate main body 41, and is configured so that when the shielding plate 34 is in the lowest position, the lower part of the sealing piece 49 overlaps with the upper end of the rear plate 36 of the mouth plate main body 33, and has a pressing body 28 that abuts against the sealing piece 49 and presses the shielding plate 34 toward the shielding plate main body 41 when the dust collecting bag 30 is attached to the second dust collecting section 18, so that the sealing piece 49 is pressed against the rear plate 36 of the mouth plate main body 33 by being pressed by the pressing body 28, thereby preventing air leakage.

[0031] In addition, the present invention makes the lower edge of the spacer piece 48 straight and perpendicular to the sliding direction of the shielding plate 34, and makes the upper edge of the rear plate 36 of the mouth plate main body 33 straight and perpendicular to the sliding direction of the shielding plate 34, so that the spacer piece 48 and the rear plate 36 of the mouth plate main body 33 abut against each other, preventing gaps from occurring between them and suppressing air leakage.

[0032] In addition, the present invention provides an auxiliary piece 50 on the front side of the shielding plate main body 41, and makes the lower edge of this auxiliary piece 50 straight and perpendicular to the sliding direction of the shielding plate 34, and also makes the upper edge of the front plate 35 of the mouth plate main body portion 33 straight and perpendicular to the sliding direction of the shielding plate 34.By this, the auxiliary piece 50 and the front plate 35 of the mouth plate main body portion 33 abut against each other, preventing gaps from occurring between them and suppressing air leakage.

[0033] Furthermore, the present invention is configured so that when the shielding plate 34 is in the lowest position, the lower edge of the spacer piece 48 abuts against the upper edge of the rear plate 36, and the lower edge of the auxiliary piece 50 abuts against the upper edge of the front plate 35, thereby more reliably preventing air leakage.

[0034] Furthermore, in the present invention, the thickness of the spacer piece 48 is made the same as or slightly thicker than the thickness of the rear plate 36, the thickness of the shielding plate main body 41 is made the same as or slightly thinner than the thickness of the spacer plates 37, 38, and the sum of the thicknesses of the shielding plate main body 41 and the spacer piece 48 is made the same as or slightly thicker than the sum of the thicknesses of the spacer plates 37, 38 and the rear plate 36.By doing so, when pressed by the pressing body 28, the sealing piece 49 is pressed against the rear plate 36 and the upper part of the shielding plate main body 41 is pressed against the front plate 35, not only can air leakage be more reliably suppressed, but the gripping portion 44 can be easily pulled out with light force by pinching it with fingers, and the through holes 39, 40 of the front plate main body portion 33 can be blocked by the shielding portion 46.

[0035]

[0023] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the present invention. For example, in the above-described embodiments, the spacer piece and the sealing piece are provided at the rear of the shielding plate body, the sealing piece overlaps with the rear plate of the main body of the mouth plate, and the sealing piece is pressed forward by a pressing body. However, the spacer piece and the sealing piece may be provided at the front of the shielding plate body, the sealing piece overlaps with the front plate of the main body of the mouth plate, and the sealing piece may be pressed backward by a pressing body. Furthermore, in the above-described embodiments, the dust collecting device is a docking station for a vacuum cleaner set, but the dust collecting device may also be a vacuum cleaner. [Explanation of symbols]

[0036] 1 electric vacuum cleaner set (dust collector) 2. Vacuum cleaner 3 Docking Station 18 Second dust collection section (dust collection section) 28 Pressurizing body 30 dust collection bag 31 Bag-like body 32 Mouth plate 33 Main body of the mouth plate 34 Shielding plate 35 Front panel 36 Rear plate 37 Spacer plate 37c Step part 38 Spacer plate 38c Step 39 Through holes 40 through holes 41 Shielding plate body 42 Protrusion 42a upper edge 43 Protrusion 43a upper edge 44 Knob 45 through holes 46 Shielding part 47 Anti-slip structure 48 Spacer piece 49 Sealing piece 50 Auxiliary piece

Claims

1. A dust collecting device using a dust collecting bag, the dust collecting device having a dust collecting section and a dust collecting bag detachable from the dust collecting section, the dust collecting bag having a breathable bag-like body capable of storing filtered dust therein, and a mouth plate attached to the bag-like body, the mouth plate having a mouth plate main body and a shielding plate slidably provided relative to the mouth plate main body, a shielding plate provided between the front and rear plates and having a shielding plate body and a gripping portion, the shielding plate having a through hole corresponding to the through hole in the main plate portion and a shielding portion formed therein; a retaining structure provided between the main plate portion and the shielding plate; the gripping portion having a sealing piece and a spacer piece forming a predetermined gap between the sealing piece and the shielding plate body; the sealing piece being configured to overlap the end of the main plate portion when the shielding plate is in the lowest position; and a pressing body being in contact with the sealing piece and pressing the shielding plate toward the main plate portion when the dust collecting bag is attached to the dust collecting portion.

2. A dust collecting device using a dust bag as described in claim 1, characterized in that the edge of the spacer piece on the side of the mouth plate main body is straight and perpendicular to the sliding direction of the shielding plate, and the edge of the spacer piece on the side of the mouth plate main body is straight and perpendicular to the sliding direction of the shielding plate.

3. A dust collecting device using a dust bag as described in claim 2, characterized in that an auxiliary piece is provided on the side opposite the spacer of the shielding plate body, and the edge of this auxiliary piece on the side of the mouth plate body is straight and perpendicular to the sliding direction of the shielding plate, and the edge of the auxiliary piece on the side of the mouth plate body is straight and perpendicular to the sliding direction of the shielding plate.

4. A dust collecting device using a dust bag as described in claim 3, characterized in that when the shielding plate is in the lowest position, the edge of the spacer piece on the side of the main body of the mouth plate abuts against the edge of the spacer piece on one of the front or rear plates, and the edge of the auxiliary piece on the side of the main body of the mouth plate abuts against the edge of the auxiliary piece on the other of the front or rear plates.

5. A dust collecting device using a dust collecting bag as described in claim 1, characterized in that the thickness of the spacer piece is the same as or slightly thicker than the thickness of one of the front or rear plates on the spacer piece side, the thickness of the shielding plate body is the same as or slightly thinner than the thickness of the spacer plate, and the sum of the thicknesses of the shielding plate body and the spacer piece is the same as or slightly greater than the sum of the thickness of the spacer plate and one of the front or rear plates on the spacer piece side.

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