vacuum cleaner

Abstract

To provide an electric vacuum cleaner that ensures a clear airflow path for the air coming out of the dust collection bag and suppresses damage to the dust collection bag. [Solution] The vacuum cleaner according to the embodiment includes a dust collection section provided with a dust collection chamber. The dust collection section has a first opposing section, a second opposing section, and a first inner surface that extends in a first direction from the first opposing section toward the second opposing section and covers the filter material of the dust collection bag. The first inner surface has a curved surface that curves concavely in a cross section perpendicular to the first direction to form a dust collection chamber, and a concave surface that is recessed from the curved surface toward the outside of the dust collection chamber. The concave surface and the filter material form a first air passage. The first air passage extends in the first direction and communicates with the dust collection chamber. The end of the first air passage on the first direction side communicates with the exhaust port of the second opposing section.

Description

Technical Field

[0001] Embodiments of the present invention relate to an electric vacuum cleaner.

Background Art

[0002] Conventionally, there is known an electric vacuum cleaner that houses a dust collection bag in a dust collection chamber provided in a dust collection unit and stores dust in the dust collection bag. In the dust collection unit, an air intake and an air outlet are arranged opposite to each other. Air is introduced from the air intake into the dust collection bag and sucked by an electric blower through the air outlet. Some of this type of electric vacuum cleaner has a plurality of ribs provided on the lid of the dust collection unit to secure an air passage through which air coming out of the dust collection bag and going toward the air outlet passes.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the prior art, when the height of the ribs is relatively low, the expanded dust collection bag may enter between two adjacent ribs and fill the space between the two ribs, making it difficult to secure an air passage. When the height of the ribs is made relatively high to secure an air passage, there is a risk that the dust collection bag may be damaged by the ribs.

[0005] One of the problems to be solved by the present invention is to provide an electric vacuum cleaner in which an air passage for air coming out of the dust collection bag can be easily secured and damage to the dust collection bag can be suppressed.

Means for Solving the Problems

[0006] An electric vacuum cleaner according to one embodiment of the present invention comprises a suction pipe provided with a suction port, an electric blower that sucks air through the suction pipe, and a dust collection section located between the suction pipe and the electric blower, which is a space for housing a dust collection bag that collects dust contained in the air sucked in by the electric blower, wherein the dust collection bag has a plate material provided with an inlet and a bag-shaped filter material attached to the plate material, and the dust collection section is provided with an air intake port that communicates with the dust collection chamber and the suction pipe, supports the plate material and faces the dust collection chamber. It has a first opposing portion, an exhaust port communicating with the dust collection chamber, a second opposing portion located on the electric blower side relative to the first opposing portion, facing the portion of the filter material opposite to the plate material, and facing the dust collection chamber, and a first inner surface extending in a first direction from the first opposing portion toward the second opposing portion, covering the filter material and facing the dust collection chamber, wherein the first inner surface has a curved surface whose cross section perpendicular to the first direction is concave and forms the dust collection chamber, and a concave surface that is recessed from the curved surface toward the outside of the dust collection chamber, With the filter material in close contact with the curved surface, The concave surface and the filter material between First airway but formation So The first air passage extends in the first direction and connects to the dust collection chamber, and the end of the first air passage on the first direction side connects to the exhaust port.

[0007] In the aforementioned vacuum cleaner, for example, the concave surface is curved.

[0008] In the aforementioned vacuum cleaner, for example, the dust collection section has a plurality of ribs provided on the curved surfaces on both sides of the concave surface in the width direction perpendicular to the first direction of the dust collection section, which protrude from the curved surface toward the dust collection chamber and extend in the first direction.

[0009] The electric vacuum cleaner, for example, includes a gripping portion located on the first direction side with respect to the dust collection portion, the suction tube, the dust collection portion, and the gripping portion are aligned in the first direction, the dust collection portion has a first convex outer surface on the opposite side of the concave surface that is aligned with the concave surface, the suction tube has a second outer surface located on the opposite side of the first direction from the first outer surface and formed in a convex shape substantially the same as the first outer surface, and the gripping portion has a third outer surface located on the first direction side with respect to the first outer surface and formed in a convex shape substantially the same as the first outer surface.

[0010] In the aforementioned vacuum cleaner, for example, the dust collection unit has ribs extending from the first air passage to the dust collection chamber.

[0011] With the above-described vacuum cleaner, for example, it is easier to ensure an airflow path for the air coming out of the dust collection bag and damage to the dust collection bag can be suppressed. [Brief explanation of the drawing]

[0012] [Figure 1] Figure 1 is an illustrative and schematic perspective view showing an electric vacuum cleaner according to an embodiment. [Figure 2] Figure 2 is an illustrative and schematic perspective view showing the vacuum cleaner body of an electric vacuum cleaner according to an embodiment. [Figure 3] Figure 3 is an illustrative and schematic side view showing the vacuum cleaner body of an electric vacuum cleaner according to an embodiment. [Figure 4] Figure 4 is an illustrative and schematic front view showing the vacuum cleaner body of an electric vacuum cleaner according to an embodiment. [Figure 5] Figure 5 is a cross-sectional view along the VV line in Figure 4. [Figure 6] Figure 6 is a cross-sectional view showing the vacuum cleaner body of the electric vacuum cleaner shown in Figure 5 with the dust collection bag housed inside. [Figure 7] Figure 7 is an illustrative and schematic exploded perspective view showing the vacuum cleaner body of an electric vacuum cleaner according to an embodiment, in which the dust collection bag is not housed in the dust collection chamber. [Figure 8]FIG. 8 is an exemplary and schematic exploded perspective view showing the main body of the vacuum cleaner according to the embodiment, and is a view of a state where a dust collection bag is housed in the dust collection chamber. [Figure 9] FIG. 9 is a cross-sectional view taken along line IX-IX of FIG. 4. [Figure 10] FIG. 10 is a cross-sectional view showing a state where a dust collection bag is housed in the main body of the vacuum cleaner of FIG. 9. [Figure 11] FIG. 11 is an exemplary and schematic perspective view showing the lid of the vacuum cleaner according to the embodiment. [Figure 12] FIG. 12 is an exemplary and schematic cross-sectional view showing the lid of the vacuum cleaner according to the embodiment.

Mode for Carrying Out the Invention

[0013] Hereinafter, embodiments will be described with reference to the drawings. In this specification, the components according to the embodiments and the descriptions of those components may be described in a plurality of expressions. The components and the descriptions thereof are examples and are not limited by the expressions in this specification. The components may be specified by different names from those in this specification. Also, the components may be described by expressions different from those in this specification.

[0014] <Configuration of Vacuum Cleaner 10> Figure 1 is an exemplary and schematic perspective view showing an electric vacuum cleaner 10 according to an embodiment. As shown in Figure 1, the electric vacuum cleaner 10 is a stick-type electric vacuum cleaner that includes a gripping part 11 that can be grasped by the user on the upper part of the vacuum cleaner body 14, an extension tube 17 that extends from the vacuum cleaner body 14 (connected detachably), and a suction port 16 that can be attached to the tip (lower end) of the extension tube 17. The suction port 16 is connected to the vacuum cleaner body 14 via the extension tube 17 and sucks in air by the suction force of an electric blower, which will be described later. The electric vacuum cleaner 10 drives the electric blower by operating a switch or the like on an operating part 14a provided on a part of the vacuum cleaner body 14, thereby generating an airflow (a flow of air with suction force) that flows inside the vacuum cleaner body 14 and the extension tube 17. As a result, the electric vacuum cleaner 10 sucks up the object to be cleaned, for example, dust and dirt present on the floor surface, from the suction port 16. The vacuum cleaner 10 then stores the sucked-up dust in a dust collection section located inside the vacuum cleaner body 14. The suction port 16 may be equipped with a brush that rotates using a motor or the like, which can efficiently dislodge and suck up dust present in grooves or other areas on the cleaning surface. The vacuum cleaner body 14 of the vacuum cleaner 10 is also equipped with a battery 22 for driving the vacuum cleaner 10. Figure 1 and the like show directions D1 and D2. Direction D1 is along the longitudinal direction of the vacuum cleaner 10. Direction D1 is not limited to the above. For example, direction D1 may be a direction that intersects the longitudinal direction of the vacuum cleaner 10. Direction D2 is along the width direction of the vacuum cleaner 10.

[0015] Figure 2 is an exemplary and schematic perspective view showing the vacuum cleaner body 14 of the vacuum cleaner 10 according to the embodiment. Figure 3 is an exemplary and schematic side view showing the vacuum cleaner body 14 of the vacuum cleaner 10 according to the embodiment. Figure 4 is an exemplary and schematic front view showing the vacuum cleaner body 14 of the vacuum cleaner 10 according to the embodiment. Figure 5 is a cross-sectional view along the VV line in Figure 4. Figure 6 is a cross-sectional view showing the dust collection bag 100 housed in the vacuum cleaner body 14 of the vacuum cleaner 10 in Figure 5.

[0016] As shown in FIGS. 2 to 6, the cleaner main body 14 includes a housing 23, an electric blower 24, a dust collection part 28, a grip part 11, a suction pipe 15, and an inner pipe 33. The suction pipe 15, the dust collection part 28, and the grip part 11 are arranged in the D1 direction.

[0017] The suction pipe 15 includes a suction port 15a that communicates with the extension pipe 17. The suction pipe 15 is connected to the extension pipe 17. Further, the opening on the opposite side of the suction port 15a in the suction pipe 15 is connected to the inner pipe 33. The inner pipe 33 is, for example, integrally formed with the suction pipe 15. Note that the inner pipe 33 is not limited to this example. The inner pipe 33 may be a separate member from the suction pipe 15. As described above, the cleaner main body 14 operates a switch or the like of the operation part 14a to receive power supply from the battery 22 and drive the built-in electric blower 24 to generate an air flow (suction air flow) having a suction force. The suction air flow flows through the interiors of the extension pipe 17, the suction pipe 15, and the inner pipe 33 with the suction port body 16 side as the upstream, and is exhausted to the outside of the electric cleaner 10 through the electric blower 24. That is, the suction port 15a of the suction pipe 15 sucks air by the suction force of the electric blower 24. In other words, the electric blower 24 sucks air through the suction pipe 15. The dust collection part 28 is provided between the electric blower 24 and the suction pipe 15 and the inner pipe 33, and collects the dust sucked by the suction air flow in the dust collection bag 100.

[0018] FIG. 7 is an exemplary and schematic exploded perspective view showing the cleaner main body 14 of the electric cleaner 10 according to the embodiment, and is a view in a state where the dust collection bag 100 is not housed in the dust collection chamber 30. FIG. 8 is an exemplary and schematic exploded perspective view showing the cleaner main body 14 of the electric cleaner 10 according to the embodiment, and is a view in a state where the dust collection bag 100 is housed in the dust collection chamber 30.

[0019] As shown in Figures 7 and 8, the housing 23 comprises a housing body 25 and a lid 26 that is detachable from the housing body 25. The housing 23 is made of, for example, a synthetic resin material. When the lid 26 is removed from the housing body 25, the dust collection chamber 30 of the dust collection unit 28 is opened. The dust collection chamber 30 is a space provided inside the dust collection unit 28. With the lid 26 removed from the housing body 25, the dust collection bag 100 can be inserted into and removed from the dust collection chamber 30.

[0020] As shown in Figures 6 and 8, the dust collection bag 100 comprises a plate material 101 and a bag-shaped filter material 102. The plate material 101 is provided with an inlet 101a. The filter material 102 is attached to the plate material 101. The inside of the filter material 102 is connected to the inlet 101a. The filter material 102 is made of, for example, paper and is deformable. When expanded, the filter material 102 becomes a roughly rectangular parallelepiped. That is, when expanded, the filter material 102 has four sides.

[0021] <Detailed structure of dust collection unit 28> Next, the structure of the dust collection unit 28 in the vacuum cleaner 10 will be described in detail. As shown in Figures 5 and 6, the dust collection unit 28 is located between the suction pipe 15 and the electric blower 24. The dust collection unit 28 collects dust contained in the air sucked in by the electric blower 24 into the dust collection bag 100. The dust collection unit 28 is provided with a dust collection chamber 30, which is a space for housing the dust collection bag 100.

[0022] The dust collection section 28 includes a storage section 32, a sealing packing 48, a check valve 49, and a grid-like member 34.

[0023] Figure 9 is a cross-sectional view along the line IX-IX in Figure 4. Figure 10 is a cross-sectional view showing the state in which the dust collection bag 100 is housed in the vacuum cleaner body 14 of the electric vacuum cleaner 10 in Figure 9.

[0024] As shown in Figures 5, 6, 9, and 10, the housing section 32 has a first end wall 35, a second end wall 36, and a cylindrical wall 37.

[0025] The first end wall 35 and the second end wall 36 are spaced apart in the D1 direction. For example, the first end wall 35 and the second end wall 36 are opposite each other in the D1 direction. Specifically, the first end wall 35 and the second end wall 36 are parallel to each other and perpendicular to the D1 direction. However, the first end wall 35 and the second end wall 36 do not have to be opposite each other in the D1 direction. For example, the first end wall 35 and the second end wall 36 are not parallel to each other and are inclined relative to each other. Also, one or both of the first end wall 35 and the second end wall 36 are inclined with respect to the D1 direction. The second end wall 36 is positioned on the D1 side relative to the first end wall 35. The first end wall 35 is provided on at least the housing body 25. The second end wall 36 is provided across the housing body 25 and the lid 26. In other words, a portion of the second end wall 36 is provided on the housing body 25, and the other portion of the cylindrical wall 37 is provided on the lid 26.

[0026] The cylindrical wall 37 extends in the direction D1. The cylindrical wall 37 spans the first end wall 35 and the second end wall 36. A portion of the cylindrical wall 37 is provided across the housing body 25 and the lid 26. That is, a portion of the cylindrical wall 37 is provided on the housing body 25, and another portion of the cylindrical wall 37 is provided on the lid 26.

[0027] As shown in Figures 5 and 6, the seal packing 48 is fixed to the first end wall 35. The seal packing 48 is provided with an air intake port 38. The air intake port 38 is a through hole that penetrates the seal packing 48 in the D1 direction. That is, the seal packing 48 is formed in an annular shape. The air intake port 38 is located between the outlet 33a of the inner pipe 33 and the dust collection chamber 30, and communicates with the outlet 33a of the inner pipe 33 and the dust collection chamber 30. When the dust collection bag 100 is housed in the dust collection chamber 30, the air intake port 38 communicates with the inlet 101a of the plate material 101 in the dust collection bag 100.

[0028] The check valve 49 is provided on the seal packing 48. The check valve 49 is placed inside the air intake port 38 and can open and close (open / close) the air intake port 38. One end of the check valve 49 is supported on the inner circumference of the seal packing 48. In the position of the vacuum cleaner body 14 with the operating section 14a facing upward, one end of the check valve 49 is the upper end of the check valve 49. The check valve 49 can swing with one end as a pivot point between an open position (not shown) that opens the air intake port 38 and a closed position (Figures 5 and 6) that closes the air intake port 38. The check valve 49 is in the closed position when the suction force of the electric blower 24 is not acting. When the check valve 49 is in the closed position, the outlet 33a of the inner pipe 33 and the dust collection chamber 30 are not in communication. The check valve 49 moves from the closed position to the open position due to the suction force of the electric blower 24. When the check valve 49 is in the open position, the outlet 33a of the inner pipe 33 and the dust collection chamber 30 are in communication. That is, when the check valve 49 is in the open position, the suction pipe 15 and the dust collection chamber 30 are in communication.

[0029] As shown in Figures 5-7 and 9, the grid-like member 34 is superimposed on the second end wall 36 on the side opposite to the D1 direction relative to the second end wall 36.

[0030] Furthermore, as shown in Figures 5 and 6, the dust collection unit 28 is provided with an exhaust port 39. The exhaust port 39 is located on the second end wall 36. The exhaust port 39 also communicates with the dust collection chamber 30. In other words, the exhaust port 39 is connected to the intake port of the electric blower 24.

[0031] Furthermore, the dust collection section 28 has a first opposing section 41, a second opposing section 42, and a first inner surface 43. The first opposing section 41, the second opposing section 42, and the first inner surface 43 surround the dust collection chamber 30. In other words, the first opposing section 41, the second opposing section 42, and the first inner surface 43 form the dust collection chamber 30. That is, the space surrounded by the first opposing section 41, the second opposing section 42, and the first inner surface 43 is the dust collection chamber 30.

[0032] The first opposing portion 41 includes a first end wall 35, a support portion 45, a seal packing 48, and a check valve 49. The first opposing portion 41 is provided with an air intake port 38 that communicates with the dust collection chamber 30 and the suction pipe 15, and faces the dust collection chamber 30. The support portion 45 supports the plate material 101.

[0033] The second opposing portion 42 has a second end wall 36. The second opposing portion 42 faces the first opposing portion 41 on the electric blower 24 side and faces the dust collection chamber 30. The first opposing portion 41 and the second opposing portion 42 face each other in the D1 direction. In this embodiment, the direction from the first opposing portion 41 to the second opposing portion 42 is the D1 direction. The second opposing portion 42 is provided with an exhaust port 39 that communicates with the dust collection chamber 30. The D1 direction is an example of the first direction.

[0034] As shown in Figures 9 and 10, the first inner surface 43 is the inner surface of the cylindrical wall 37. That is, the first inner surface 43 is provided on the cylindrical wall 37. The first inner surface 43 extends in the direction D1 from the first opposing part 41 toward the second opposing part 42. The first inner surface 43 faces the dust collection chamber 30. In other words, the first inner surface 43 surrounds the dust collection chamber 30. That is, the internal space inside the first inner surface 43 constitutes the dust collection chamber 30. The first inner surface 43 covers the filter material 102 between the first opposing part 41 and the second opposing part 42. The first inner surface 43 surrounds the filter material 102 between the first opposing part 41 and the second opposing part 42.

[0035] Figure 11 is an exemplary and schematic perspective view showing the lid 26 of the vacuum cleaner 10 according to the embodiment. Figure 12 is an exemplary and schematic cross-sectional view showing the lid 26 of the vacuum cleaner 10 according to the embodiment.

[0036] As shown in Figures 9 to 12, the first inner surface 43 has a curved surface 46 and a concave surface 47.

[0037] The curved surface 46 is provided, for example, on the lid 26. The curved surface 46 has a concave curve in its cross-section perpendicular to the D1 direction. The curved surface 46 forms the dust collection chamber 30. The curved surface 46 may be formed with a single radius of curvature, or with a combination of multiple radii of curvature.

[0038] The concave surface 47 is provided, for example, on the lid 26. The concave surface 47 extends, for example, from an intermediate portion in the D1 direction of the cylindrical wall 37 to the second end wall 36. The concave surface 47 is recessed from the curved surface 46 toward the outside of the dust collection chamber 30. The concave surface 47 is curved. The concave surface 47 may be formed with a single radius of curvature, or with a combination of multiple radii of curvature, or a combination of a straight line and a radius of curvature. The radius of curvature of the concave surface 47 is smaller than the radius of curvature of the curved surface 46. The concave surface 47 divides the curved surface 46 into two regions 46a and 46b. In other words, the concave surface 47 is provided at the top of the curved surface 46.

[0039] The concave surface 47 forms a first air passage 50. More specifically, the concave surface 47 and the filter material 102 of the dust collection bag 100 form the first air passage 50. The first air passage 50 extends, for example, from an intermediate portion in the D1 direction of the cylindrical wall 37 to the second end wall 36. The first air passage 50 extends in the D1 direction outside the dust collection chamber 30 and communicates with the dust collection chamber 30. The first air passage 50 is a recess (groove) formed in the curved surface 46. In another view, the first air passage 50 protrudes from the dust collection chamber 30 toward the outside of the dust collection chamber 30. The first air passage 50 faces one of the four sides of the rectangular filter material 102 of the dust collection bag 100, rather than an edge. The amount of protrusion of the first air passage 50 from the dust collection chamber 30 is, for example, 5-6 mm, but is not limited thereto. The first air passage 50 is also called a concave air passage. An air passage is also called a passageway.

[0040] As shown in Figure 5, the D1-direction end 50a of the first air passage 50 is connected to the exhaust port 39 via the air passage 52. The air passage 52 extends from the D1-direction end 50a of the first air passage 50, through the D1-direction end 30a of the dust collection chamber 30 and the opening of the grid-like member 34, to the exhaust port 39.

[0041] Furthermore, as shown in Figure 11, the dust collection section 28 has a plurality of ribs 54. The plurality of ribs 54 are provided on the curved surfaces 46 on both sides of the concave surface 47 in the width direction perpendicular to the D1 direction of the dust collection section 28. That is, a plurality of ribs 54 are provided in each of the two regions 46a and 46b of the curved surface 46. As an example, two ribs 54 are provided on each side of the concave surface 47. The ribs 54 protrude from the curved surface 46 toward the dust collection chamber 30. The amount of protrusion (height) of the ribs 54 is, for example, 1.5 mm. Note that the number and shape of the ribs 54 are not limited to the above. Each rib 54 protrudes from the curved surface 46 toward the dust collection chamber 30 and extends in the D1 direction.

[0042] Furthermore, as shown in Figures 9 and 11, the dust collection section 28 has ribs 55 extending from the D1-direction end 50a of the first air passage 50 to the dust collection chamber 30. As an example, there are three (or more) ribs 55. The ribs 55 protrude from the second end wall 36 toward the dust collection chamber 30. In addition, multiple ribs 56 are provided on both sides of the ribs 55. The ribs 56 protrude from the second end wall 36 toward the dust collection chamber 30. An air passage 52 is formed between these multiple ribs 55, 56.

[0043] Furthermore, as shown in Figures 2-5, the dust collection section 28 has a first outer surface 61. The first outer surface 61 is the surface opposite to the concave surface 47 and is formed in a convex shape along the concave surface 47. The wall thickness between the first outer surface 61 and the concave surface 47 in the dust collection section 28 is constant. The suction tube 15 has a second outer surface 62. The second outer surface 62 is located on the opposite side of the D1 direction from the first outer surface 61. The second outer surface 62 is formed in a convex shape that is substantially the same as the first outer surface 61. The gripping section 11 has a third outer surface 63. The third outer surface 63 is located on the D1 direction side of the first outer surface 61. The third outer surface 63 is formed in a convex shape that is substantially the same as the first outer surface 61. Except for the operating section 14a, the third outer surface 63 has the same shape as the first outer surface 61 and is connected to the first outer surface 61. Therefore, the suction tube 15, dust collection section 28, and gripping section 11 are formed in a substantially identical shape and are convex in the direction D1. The extension tube 17 may also be formed in substantially the same shape. The first outer surface 61, the second outer surface 62, and the third outer surface 63 are included in the outer surface 60 of the vacuum cleaner body 14.

[0044] In the above configuration, air is drawn into the dust collection unit 28 from the air intake port 38 by the suction force of the electric blower 24. The air enters the dust collection bag 100, which is housed in the dust collection unit 28, from the inlet 101a of the dust collection bag 100, passes through the filter material 102, and exits the dust collection bag 100. At this time, a portion of the air flows in the direction D1 within the dust collection bag 100, exits from the end 50a in the direction D1 of the dust collection bag 100, and enters the exhaust port 39. Another portion of the air flows in a direction intersecting the direction D1 within the dust collection bag 100, exits into the first air passage 50, and flows in the direction D1 within the first air passage 50. The air flows from the end 50a in the direction D1 of the first air passage 50 into the air passage 52 and enters the exhaust port 39. The air that enters the exhaust port 39 is exhausted to the outside of the vacuum cleaner body 14 through the electric blower 24.

[0045] <Summary> As described above, the vacuum cleaner 10 of this embodiment comprises a suction pipe 15, an electric blower 24, and a dust collection unit 28. The suction pipe 15 is provided with a suction port 15a. The electric blower 24 sucks air through the suction pipe 15. The dust collection unit 28 is located between the suction pipe 15 and the electric blower 24 and is provided with a dust collection chamber 30, which is a space for housing a dust collection bag 100 that collects dust contained in the air sucked into the electric blower 24. The dust collection bag 100 has a plate material 101 with an inlet 101a and a bag-shaped filter material 102 attached to the plate material 101. The dust collection unit 28 has a first opposing part 41, a second opposing part 42, and a first inner surface 43. The first opposing section 41 has an air intake port 38 that opens into the dust collection chamber 30 and communicates with the suction pipe 15, faces the dust collection chamber 30, and supports the plate material 101. The second opposing section 42 has an exhaust port 39 that opens into the dust collection chamber 30, faces the first opposing section 41 on the electric blower 24 side, and faces the dust collection chamber 30. The first inner surface 43 extends in the D1 direction (first direction) from the first opposing section 41 toward the second opposing section 42, faces the dust collection chamber 30, and covers the filter material 102 between the first opposing section 41 and the second opposing section 42. The first inner surface 43 has a curved surface 46 and a concave surface 47. The curved surface 46 has a cross section perpendicular to the D1 direction that is concave, forming the dust collection chamber 30. The concave surface 47 is recessed from the curved surface 46 toward the outside of the dust collection chamber 30. The concave surface 47 and the filter material 102 form a first air passage 50 that extends in the D1 direction and connects to the dust collection chamber 30. The D1 direction end 50a of the first air passage 50 connects to the exhaust port 39.

[0046] With this configuration, the concave surface 47 that extends outward from the curved surface 46 towards the dust collection chamber 30 and the filter material 102 form the first air passage 50. As a result, the flat filter material 102 covers the surface of the first air passage 50 that faces the dust collection chamber 30, making it difficult for the filter material 102 of the dust collection bag 100 to enter the first air passage 50. Therefore, the first air passage 50, which serves as an air passage for the air coming out of the dust collection bag 100, is easily maintained. Furthermore, with the above configuration, the filter material 102 easily adheres to the first inner surface 43, which increases the amount of dust that can be accumulated in the dust collection bag 100. Therefore, even if the negative pressure in the first air passage 50 increases, the filter material 102 is less likely to be drawn into the first air passage 50, thus making it easier to maintain the first air passage 50. Furthermore, since the concave surface 47 is recessed outward from the curved surface 46 towards the dust collection chamber 30, damage to the dust collection bag 100, such as rupture, can be suppressed even if too much dust is sucked up.

[0047] Furthermore, the concave surface 47 is curved.

[0048] With this configuration, the first air passage 50 is more easily secured.

[0049] Furthermore, the dust collection section 28 has a plurality of ribs 54. The ribs 54 are provided on the curved surfaces 46 on both sides of the concave surface 47 in the width direction (D2 direction) perpendicular to the D1 direction of the dust collection section 28, and protrude from the curved surfaces 46 toward the dust collection chamber 30 and extend in the D1 direction.

[0050] With this configuration, the ribs 54 are embedded in the filter media 102 and catch on it, thereby preventing the filter media 102 from entering the first air passage 50. Therefore, it is easier to ensure the first air passage 50 is open.

[0051] The electric vacuum cleaner 10 also includes a gripping part 11 and a vacuum cleaner body 14. The gripping part 11 is located on the D1 direction side relative to the dust collection part 28 and is grippable. The vacuum cleaner body 14 has a suction pipe 15, an electric blower 24, a dust collection part 28, and a gripping part 11. The suction pipe 15, the dust collection part 28, and the gripping part 11 are aligned in the D1 direction. The dust collection part 28 has a first outer surface 61 that is convex along the concave surface 47 on the opposite side of the concave surface 47. The suction pipe 15 has a second outer surface 62 that is located on the D1 direction side relative to the first outer surface 61 and is formed in a convex shape substantially the same as the first outer surface 61. The gripping part 11 has a third outer surface 63 that is located on the D1 direction side relative to the first outer surface 61 and is formed in a convex shape substantially the same as the first outer surface 61. The first outer surface 61, the second outer surface 62, and the third outer surface 63 are aligned in approximately a straight line. The first outer surface 61, the second outer surface 62, and the third outer surface 63 are included in the outer surface 60 of the vacuum cleaner body 14.

[0052] With this configuration, the first outer surface 61 of the dust collection section 28 constitutes the outer surface 60 of the vacuum cleaner body 14, and the concave surface 47 forms the first air passage 50, thus enabling weight reduction. Furthermore, since the first outer surface 61 of the dust collection section 28, the second outer surface 62 of the suction pipe 15, and the third outer surface 63 of the gripping section 11 are formed in a convex shape that is substantially the same, the design has a sense of shape uniformity and is aesthetically pleasing. In addition, since the shape of the first outer surface 61 can be utilized for the shape of the concave surface 47, the thickness of the cylindrical wall 37 acting as a partition can be reduced, making it easier to reduce weight.

[0053] Furthermore, the dust collection section 28 has a rib 55 that extends from the end 50a on the D1 direction side of the first air passage 50 to the dust collection chamber 30.

[0054] With this configuration, even if the dust collection unit 28 expands, the cleaned air that has passed through the first air passage 50 can be reliably exhausted from the exhaust port 39.

[0055] In the above embodiment, an example of a vacuum cleaner 10 with a top center of gravity, where the vacuum cleaner body 14 is located at the top, was shown, but the vacuum cleaner 10 is not limited to this. For example, the vacuum cleaner 10 may be a vacuum cleaner 10 with a bottom center of gravity, where the vacuum cleaner body 14 is located at the bottom. Furthermore, the vacuum cleaner 10 may be a handheld type in which the suction pipe 15 and the suction port 16 are directly connected without an extension pipe 17, or a handheld type in which the suction port 16 and extension pipe 17 are not provided.

[0056] Furthermore, the concave surface 47 and the first air passage 50 may be provided on the housing body 25. Also, the concave surface 47 and the first air passage 50 may extend, for example, from the support portion 45 of the first opposing portion 41 to the second end wall 36.

[0057] Although embodiments of the present invention have been described above, these embodiments are merely examples and are not intended to limit the scope of the invention. The above embodiments can be implemented in various forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. The above embodiments are included in the scope and spirit of the invention, as well as in the claims of the invention and its equivalents. [Explanation of symbols]

[0058] 10...Electric vacuum cleaner, 11...Grip part, 14...Vacuum cleaner body, 15...Suction tube, 15a...Suction port, 23...Housing, 24...Electric blower, 28...Dust collection part, 30...Dust collection chamber, 30a, 50a...End part, 35...First end wall, 36...Second end wall, 37...Cylindrical wall, 38...Intake port, 39...Exhaust port, 41...First opposing part, 42...Second opposing part, 43...First inner surface, 46...Curved surface, 47...Concave surface, 50...First air passage, 54, 55, 56...Ribs, 60...Outer surface, 61...First outer surface, 62...Second outer surface, 63...Third outer surface, 100...Dust collection bag, 101...Plate material, 101a...Inlet, 102...Filter material.

Claims

1. A suction tube equipped with a suction port, An electric blower that draws air through the aforementioned suction pipe, A dust collection unit is provided, which is a space located between the suction pipe and the electric blower, and which houses a dust collection chamber for collecting dust contained in the air sucked into the electric blower, Equipped with, The aforementioned dust collection bag is A wooden board with an entrance, A bag-shaped filter material attached to the aforementioned plate material, It has, The aforementioned dust collection unit is An air intake port is provided that communicates with the dust collection chamber and the suction pipe, and a first opposing part that faces the dust collection chamber and supports the plate material, An exhaust port communicating with the dust collection chamber is provided, and a second opposing part is provided that faces the first opposing part on the electric blower side and faces the dust collection chamber, Extending in a first direction from the first opposing portion toward the second opposing portion, facing the dust collection chamber, and covering the filter material between the first opposing portion and the second opposing portion, It has, The first inner surface is, A curved surface having a cross-section perpendicular to the first direction that curves in a concave shape and forming the dust collection chamber, A concave surface that is recessed from the curved surface toward the outside of the dust collection chamber, It has, With the filter material in close contact with the curved surface, a first air passage is formed between the concave surface and the filter material. The first air passage extends in the first direction and connects to the dust collection chamber. The end of the first air passage on the first direction side is connected to the exhaust port. Vacuum cleaner.

2. The aforementioned concave surface is curved. The vacuum cleaner according to claim 1.

3. The dust collection section is provided on the curved surfaces on both sides of the concave surface in the width direction perpendicular to the first direction of the dust collection section, and has a plurality of ribs that protrude from the curved surface toward the dust collection chamber and extend in the first direction. The vacuum cleaner according to claim 1.

4. A gripping portion is located on the first direction side with respect to the dust collection portion and is capable of gripping, A vacuum cleaner body having the suction pipe, the electric blower, the dust collection unit, and the gripping unit, Equipped with, The suction pipe, the dust collection section, and the gripping section are aligned in the first direction, The dust collection section has a first convex outer surface on the opposite side of the concave surface that is aligned with the concave surface, The suction tube has a second outer surface which is located on the opposite side of the first direction from the first outer surface and is formed in a convex shape substantially the same as the first outer surface, The gripping portion has a third outer surface that is located on the first direction side with respect to the first outer surface and is formed in a convex shape substantially the same as the first outer surface. The first outer surface, the second outer surface, and the third outer surface are included in the outer surface of the vacuum cleaner body. The vacuum cleaner according to claim 1.

5. The dust collection section has ribs extending from the end of the first air passage on the first direction side to the dust collection chamber. The vacuum cleaner according to claim 1.

Images