Suction tools and vacuum cleaners

Abstract

To provide a suction tool and an electric vacuum cleaner that can easily collect dust on the end side in the axial direction. [Solution] The suction tool is a suction tool for an electric vacuum cleaner comprising a rotating cleaning body 4 having a cleaning body 42, a drive unit which is a drive source for rotating the rotating cleaning body 4, and a suction tool body having a rotary cleaning body chamber 6b in which the rotary cleaning body 4 is rotatably arranged, wherein the suction tool body has a suction port 6a arranged on the bottom side, a communication port 6c which is located towards the centre in the axial direction of the rotary cleaning body 4 and is located rearward of the axis L5 of the rotary cleaning body 4 in a direction perpendicular to the axial direction, and a protrusion 6d which protrudes from the inner wall (6j) of the rotary cleaning body chamber 6b and comes into contact with the cleaning body 42, the protrusion 6d extending so that its extension direction intersects with the axial direction, and as it moves from one end side towards the centre in the axial direction, the front end 6d1 is located further forward than the rear end 6d2 in the fore-and-aft direction.

Description

[Technical Field]

[0001] The present invention relates to a suction tool and a vacuum cleaner that include a rotary cleaning body. [Background technology]

[0002] Patent document 1 discloses a suction tool for an electric vacuum cleaner, which has a protruding portion that protrudes from a partition wall that separates a front space where a rotating brush is arranged from a rear space where a communication port is located, toward the rotating brush (rotating cleaning body) and comes into contact with the rotating brush. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-25289 Summary of the Invention [Problem to be solved by the invention]

[0004] The above suction tool has a problem in that the further away from the center of the rotary brush is from the end in the axial direction, the more difficult it becomes for dust to be drawn into the communication opening. That is, dust on the axial end side of the rotary brush has difficulty reaching the communication opening and tends to remain at the end side. The present invention aims to realize a suction tool and an electric vacuum cleaner that can easily collect dust on the end sides in the axial direction. [Means for solving the problem]

[0005] The suction tool of the present invention is a suction tool for an electric vacuum cleaner comprising a rotating cleaning body having a cleaning body, a drive unit which is a drive source for rotating the rotary cleaning body, and a suction tool body having a rotary cleaning body chamber in which the rotary cleaning body is rotatably arranged, wherein the suction tool body has a suction port arranged on the bottom side, a communication port which is located towards the centre in the axial direction of the rotary cleaning body and is located rearward of the axis of the rotary cleaning body in a direction perpendicular to the axial direction, and a protrusion which protrudes from the inner wall of the rotary cleaning body chamber and comes into contact with the cleaning body, the protrusion extending so that its extension direction intersects with the axial direction, and as one end moves from the one end towards the centre in the axial direction, the front end is located further forward than the rear end in the fore-and-aft direction. [Effects of the Invention]

[0006] According to the above configuration, dust on the end side in the axial direction is easily collected. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a perspective view of an electric vacuum cleaner according to an embodiment. [Figure 2] FIG. 2 is a cross-sectional view of the suction tool taken perpendicular to the left-right direction. [Figure 3] FIG. 2 is a perspective view of the suction tool in a disassembled state, viewed from above on the front side. [Figure 4] FIG. 2 is a perspective view of the suction tool in a disassembled state, seen from below and rearward; [Figure 5] (a) is a view of the case of the suction tool body seen from the cleaning surface side, (b) is an oblique view of the case of the suction tool body seen from the cleaning surface side, and (c) is a view of the rotating cleaning body seen from above. [Figure 6] 10(a) and 10(b) are perspective views for explaining the other end side support unit, and 10(c) and 10(d) are perspective views for explaining the one end side support unit and the drive unit. [Figure 7] FIG. 10 is a diagram illustrating the movement of dust. [Figure 8]FIG. 10 is a diagram illustrating a protrusion of a suction tool of a second embodiment, as viewed from above with the front cover removed and the protrusion remaining. [Figure 9] 10A and 10B are diagrams illustrating a modified example of a protrusion.

[0008] <<Embodiment>> First Embodiment 1. Overview 1, the electric vacuum cleaner X comprises a vacuum cleaner body 1, an extension tube 2, and a suction tool 3. When cleaning a floor, the vacuum cleaner body 1 is positioned on the upper side and the suction tool 3 is positioned on the lower side. The vacuum cleaner main body 1 comprises a housing 11 that houses an electric blower, a battery, etc., and a dust collection unit 12 that is detachably attached to the housing 11, and a handle unit 13, an operation unit 14, and an extension pipe connector 15 are provided on the housing 11. The extension pipe connector 15 is provided on the lower end side of the vacuum cleaner main body 1. In this embodiment, the dust collection unit 12 is of a cyclone type, but it may also be of a paper bag type. In the case of a paper bag type, the dust collection unit 12 is provided as part of the housing 11, so that they are integrally configured. The extension tube 2 has a tubular portion 21. The extension tube 2 has a main body connector 22 at one end for detachably connecting to the extension tube connector 15 of the vacuum cleaner main body 1, and a suction tool connector 23 at the other end for detachably connecting to the suction tool 3. The extension tube 2 may be made up of two tubes and be telescopic, or may be made up of a single tube and be non-telescopic. The extension tube 2 may also be fixed to at least one of the vacuum cleaner main body 1 and the suction tool 3. 2, the suction tool 3 includes a rotary cleaning body 4 on a suction tool main body 6. The suction tool main body 6 is of a so-called power brush type, which has a drive source for driving the rotary cleaning body 4. The suction tool 3 will be described below based on the state in which the suction tool 3 cleans the floor surface. The imaginary line along which the rotation axis of the rotating cleaning body 4 extends is referred to as the axis, the direction in which the axis extends (including the direction parallel to the axis) is referred to as the axial direction or left-right direction, the right side facing the suction tool 3 is referred to as the right side of the axial direction, the direction perpendicular to the axial direction and the up-down direction is referred to as the front-to-back direction, and the side along which the suction tool 3 moves due to the rotation of the rotating cleaning body 4 is referred to as the front side.

[0009] 2. Suction tool 2 or 3, the suction tool 3 includes a rotary cleaning body 4 having a cleaning body 42, a drive unit 50 having a drive source for rotating the rotary cleaning body, and a suction tool main body 6 having a rotary cleaning body chamber in which the rotary cleaning body 4 is rotatably arranged. Note that here, support units 55 and 56 are also included that rotatably support the rotary cleaning body.

[0010] (2-1) Rotating cleaning body 5(c) and 6, the rotary cleaning body 4 includes at least a cylindrical rotating body 41 and a cleaning body 42 provided on the outer peripheral surface of the rotating body 41. Here, the rotary cleaning body 4 further includes a driven member 43 provided at one axial end (right end) of the rotating body 41, and a support member 44 provided at the other axial end (left end) of the rotating body 41 and rotatably supporting the other end of the rotating body 41. The rotary cleaning body 4 can be inserted into and removed from the rotary cleaning body chamber 6b, and the support tool 44 is supported by the support unit 56, which allows the rotating body 41 to rotate, and the driven tool 43 is rotationally driven by the drive unit 5. The drive unit functions as a drive section. The cleaning body 42 is disposed so as to protrude radially outward and extend along the axis of the rotating body 41. As a result, as the rotating cleaning body 4 rotates, it can scrape off dust from the floor surface. The cleaning elements 42 may be arranged in one or more rows. In this embodiment, there are multiple rows (e.g., four rows) and the cleaning elements 42 are arranged at intervals (e.g., equal intervals) in the circumferential direction. The cleaning elements 42 are arranged so as to move from one side to the other in the axial direction of the rotating element 41 toward one side or the other in the circumferential direction of the circumferential surface of the rotating element 41. In this embodiment, the cleaning elements 42 are arranged in a spiral shape on the rotating element 41. When viewed from the axial direction, the angle between both ends of the cleaning element 42 is in the range of 150 to 190°, for example, 170°. Furthermore, as shown in FIG. 5(c), when the cleaning element 42 is viewed from above, the angle B between the extension direction L6 of the cleaning element 42 and the axis (rotation axis) L5 of the rotating cleaning element 4 is in the range of 10 to 25°, and is 15° in this example. The cleaning element 42 is made of an elastically deformable material such as fiber or rubber, or a combination of these. The radially extending tip of the cleaning element 42 collides with a protrusion 6d of the rotary cleaning element chamber 6b, which will be described later. This causes dust adhering to the cleaning element 42 to separate from (drop off from) the cleaning element 42.

[0011] (2-2) Drive unit As shown in FIG. 3, the drive unit 50 is housed within the suction tool body 6. As shown in (c) and (d) of Figure 5, the drive unit 50 includes a drive output part 51 that outputs a drive force, a drive input part 52 that inputs the rotational drive to the rotary cleaning body 4, and a drive transmission means 53 that transmits the drive force of the drive output part 51 to the drive input part 52. The drive output unit 51 includes a motor 511 and a gear (output pulley) 512 attached to the rotation shaft (drive shaft) of the motor. The drive input unit 52 includes a fitting body 521 having a protrusion 521a that detachably fits into a recess 43a of the driven tool 43 of the rotary cleaning body 4, a drive (driven) shaft (not shown) provided on the fitting body 521, and a toothed pulley (driven pulley) 522 provided on the drive shaft. The drive transmission means 53 is a toothed belt wound around the gear 512 and the toothed pulley 522. The rotation shaft on the output side (motor 511 side) and the drive shaft on the input side are supported by bearings 513, 523, and the fitting body 521 is rotatably supported by a support 54 to which the motor 511 is fixed.

[0012] (2-3) Support unit The support unit has a one-end support unit 55 that supports one axial end of the rotary cleaning body 4, and an other-end support unit 56 that supports the other axial end. An example of the one end here is the right side, and an example of the other end is the left side. The one-end support unit 55 is configured by, for example, a fitting body 521 of the drive unit 50 and a support body 54 that rotatably supports the fitting body 521. The one-end support unit 55 configures a part of the drive unit 50. 4 and 6(a) and (b), the other-end support unit 56 is detachably provided on the lower case 61 of the suction tool main body 6. The other-end support unit 56 has a lower cover part 561 that covers the opening 6p adjacent to the suction port 6a from below, engagement parts 562 and 563 that engage with engagement parts 6q and 6r (see FIG. 5) of the lower case 61, and an abutment part 564 that abuts against the convex part 441 of the support tool 44 of the rotary cleaning body 4 from below.

[0013] (2-4) Suction tool body The suction tool body 6 sucks up dust on the cleaning surface and sends the sucked dust through the extension tube 2 to the cleaner body 1. The suction force for the dust is generated by an electric blower in the cleaner body 1. As shown in Figures 2 to 4, the suction tool main body 6 has a suction port 6a arranged on the bottom side, a rotary cleaning body chamber 6b that houses the rotary cleaning body 4, a communication port 6c for connecting the rotary cleaning body chamber 6b with the vacuum cleaner main body 1, and a protrusion 6d that protrudes from the wall of the rotary cleaning body chamber 6b and comes into contact with the rotary cleaning body 4 (cleaning body 42). The lead lines of the rotary cleaning body chamber 6b are indicated by arrows to distinguish them from lead lines of the walls that form the space. The suction tool body 6 here further has a drive chamber 6e in which the drive unit 50 is disposed, and a support chamber 6f in which the support unit (56) is disposed. The suction tool body 6 has a communication passage 6g that connects the rotary cleaning body chamber 6b with the extension pipe 2. The opening of the communication passage 6g on the rotary cleaning body chamber 6b side is a communication port 6c.

[0014] As shown in FIGS. 2 to 4, the suction port 6a is provided to correspond to the rotary cleaning body 4, and here has a rectangular shape that is long in the axial direction of the rotary cleaning body 4. 2, the suction port 6a is provided so as to extend rearward from the front wall that forms the front end of the suction tool body 6. The rear end of the suction port 6a is located rearward of the rotation axis of the rotary cleaning body 4. The lower end of the front wall of the suction tool body 6 (here, the lower end of the bumper 621) is located, for example, in a range from a position 5% above the radius of the rotary cleaning body 4 to a position 60% below the radius of the rotary cleaning body 4, relative to an imaginary line L1 that passes through the axis of the rotary cleaning body 4 and is parallel to the cleaning surface. This allows large dust particles to be sucked in without reducing suction power.

[0015] The rotary cleaning body chamber 6b accommodates the rotary cleaning body 4 with a portion (lower end) of the rotary cleaning body 4 extending toward the cleaning surface. As shown in FIGS. 2 and 5, the rotary cleaning body chamber 6b has a rear wall 6h and an upper wall 6j. Here, the rear wall 6h is substantially perpendicular to the cleaning surface. The communication port 6c of the joint 65 is provided between the left and right rear walls 6h. The upper wall 6j is provided with a gap from the rotary cleaning body 4. The gap is, for example, within a range of 25 to 50% of the radius of the rotary cleaning body 4. Here, the upper wall 6j is arc-shaped. The rear end of the upper wall 6j is connected to the upper end of the rear wall 6h.

[0016] The communication port 6c is located on the left-right center side of the rotary cleaning body chamber 6b and on the rear side of the axis L5 of the rotary cleaning body 4. Here, the communication port 6c is arranged on the left-right center side of the rear wall 6h.

[0017] The suction tool body 6 has a protrusion 6d that protrudes from the wall of the rotary cleaning body chamber 6b and comes into contact with the rotary cleaning body 4 (cleaning body 42). While Fig. 5 shows a case in which the protrusions 6d are present on both sides of the axial center of the rotary cleaning body 4, they may be present on at least one side. Because one protrusion 6d and the other protrusion 6d have many structural similarities, the following description will mainly focus on the features common to one (left) protrusion 6d and the other (right) protrusion 6d. 5(a) and 5(b), the protrusion 6d protrudes in a rib-like manner from the upper wall 6j (the inner wall of the rotary cleaning body chamber 6b) downward or toward the rotary cleaning body 4. Specifically, the protrusion 6d extends from one end toward the center in the axial direction of the rotary cleaning body 4 so that the front end 6d1 is located further forward than the rear end 6d2 in the front-to-rear direction, and the extension direction intersects with the axial direction of the rotary cleaning body 4. The rear end is referred to as the rear end, and the front end is referred to as the front end. In other words, the protrusion 6d extends at an angle away from the front with respect to an imaginary plane P (see FIGS. 2 and 3) including the opening edge of the communication port 6c as it moves from one end toward the center in the axial direction of the rotary cleaning body 4. This allows dust present around the rotary cleaning body 4 to be captured on the rear side of the protrusion 6d (on the side opposite the rotational direction of the rotary cleaning body 4 relative to the protrusion 6d) (see dust 9 in FIG. 7(a)). Here, dust present around the rotary cleaning body 4 includes dust stirred up by the rotation of the rotary cleaning body 4 and dust adhering to the cleaning body 42.

[0018] In this embodiment, the upper wall 6j of the rotary cleaning body chamber 6b is arc-shaped to accommodate the rotation of the rotary cleaning body 4, and therefore the lower end (protruding end) of the protrusion 6d is also arc-shaped, as shown in Fig. 2. Note that the end (front end 6d1) of the protrusion 6d on the left-right central side, i.e., the lower end of the front end on the bumper 621 side, extends in the front-rear direction when viewed from the left-right direction. The protrusion 6d has a curved portion 6d5 that curves in the rotation direction of the rotary cleaning body 4 and a straight portion 6d6 that extends in the front-to-rear direction. The curved portion 6d5 protrudes from the upper wall 6j, and the straight portion 6d6 protrudes from the upper wall 6j and the rear wall 6h. When viewed from the left and right, the curved portion 6d5 has an angle A in the rotation direction of the rotary cleaning body 4 (the angle A between imaginary lines L2 and L3 in FIG. 2) that is in the range of 40 to 110°, and here is approximately 75°. Imaginary line L2 is an imaginary line connecting the front end of the curved portion 6d5 to the axis L5, and imaginary line L3 is an imaginary line connecting the rear end of the curved portion 6d5 to the axis L5. The front end of the curved portion 6d5 is located at a position where the angle D between the imaginary lines L1 and L2 is in the range of 10 to 35 degrees, or 30 degrees in this example. The rear end is located at a position where the angle E between the imaginary lines L1 and L3 is in the range of 20 to 60 degrees, or 40 degrees in this example.

[0019] As shown in Figures 5(a) and 5(b), the protrusion 6d extends in the left-right direction from its end toward the center, moving further away from the communication opening 6c in the front-rear direction. That is, when viewed from below (the suction opening 6a side) as shown in Figure 5(a), the protrusion 6d is inclined with respect to the axis L5 of the rotary cleaning body 4, and the left-right end (rear end 6d2) of the protrusion 6d is located further rearward than the left-right center end (front end 6d1). This reduces the problem that would occur if the protrusion 6d were not present, where dust would continue to rotate at the axial end of the rotary cleaning body 4 due to the rotation of the rotary cleaning body 4 and would not move (accumulate) toward the communication opening 6c. When viewed from below, the protrusion 6d extends linearly. Here, "linear" means that it does not have both one or more convexities and one or more concaveities in plan view. In other words, it means that it does not have extreme values, that is, it does not have a maximum value where the slope of the tangent to the protrusion 6d reverses from positive to negative, or a minimum value where the slope reverses from negative to positive. This allows dust to move smoothly forward. As shown in Fig. 5(a), when viewed from the vertical direction (from below in this case), the protrusion 6d intersects with an imaginary plane H (see Fig. 2). The imaginary plane H is an imaginary plane that passes through the rotation axis (axis line L5) of the rotary cleaning body 4 shown in Figs. 2 and 5(a) and is parallel to the direction of gravity. As shown in FIG. 5(a), when viewed from the cleaning surface side, the intersection angle C between the axis L5 of the rotary cleaning element 4 and the protrusion 6d is in the range of 15 to 45°, and is 30° in this example.

[0020] Each protrusion 6d extends continuously from the left-right end toward the center. This allows dust to move smoothly. In other words, if there is a gap (discontinuous portion) in the extension direction of the protrusion 6d (the direction intersecting with the axis L5 in FIG. 5(a)), dust will get caught there and will not be able to move smoothly. Note that gaps that do not hinder the movement of dust are conceptually included in the term "continuous." When viewed from the top-bottom direction (here, from below), each protrusion 6d has a first portion 6d3 located closer to the center of the communication opening 6c (a virtual line L4 that passes through the left-right end of the communication opening 6c and extends in the front-rear direction), and a second portion 6d4 located closer to the end of the communication opening 6c. Here, the second portion 6d4 is longer than the first portion 6d3.

[0021] As shown in (a) of Figure 5, the front end 6d1 of the protrusion 6d in the extension direction is located closer to the center of the rotating cleaning body chamber 6b than the imaginary line L4 in the left-right direction, and is closer to the imaginary line L4 than the center line C1 in the front-to-back direction that passes through the center of the communication port 6c. The front end 6d1 of the protrusion 6d may be located closer to the end of the rotary cleaning chamber 6b than the imaginary line L4 in the left-right direction, and closer to the imaginary line L4 than the end of the rotary cleaning chamber 6b. This makes it easier for dust guided toward the center in the left-right direction along the protrusion 6d to be sucked into the communication opening 6c. In other words, the front end 6d1 of the protrusion 6d is located near an imaginary line L4 that passes through the edge of the communication opening 6c and extends in the front-rear direction. Here, "near" means that the distance from the imaginary line L4 is within 30% of the left-right dimension of the communication opening 6c. In FIG. 5, the front end 6d1 is located approximately 20% away from the imaginary line L4 toward the inside of the communication opening 6c (toward the center line C1). As shown in Fig. 5(b), the protrusion amount of the protrusion 6d at the end (front end 6d1) on the central side in the left-right direction decreases toward the end (tapered toward the end), which makes it easier for dust moving along the protrusion 6d to separate from the protrusion 6d.

[0022] On the other hand, as shown in FIG. 5(a), the rear end 6d2 of the protrusion 6d in the extension direction is located closer to the end of the rotary cleaning element chamber 6b in the left-right direction than the center line C1. The left-right end (rear end 6d2) of the protrusion 6d may be located inside or outside the left-right direction relative to the axial end (end on the side where the protrusion 6d is present) of the cleaning element 42 of the rotary cleaning element 4. Note that if the end is located outside the cleaning element 42, it becomes easier to capture dust present at the end of the cleaning element 42. Here, we will explain the case where there are protrusions 6d on both sides of the center of the rotary cleaning body 4 in the left-right direction. The structure of each of the left and right protrusions 6d is as described above, but as shown in Figure 5(a), when viewed from the cleaning surface side, the protrusions 6d are located outward from the communication openings 6c in the left-right direction. In other words, they are inclined in a V-shape. In this configuration, as the rotary cleaning body 4 rotates, the cleaning body 42 comes into contact with the protrusion 6d. As a result, dust present around the rotary cleaning body 4 is captured by the protrusion 6d. The dust captured by the protrusion 6d is pushed by the movement of the cleaning body 42 in the rotational direction and moved toward the front end 6d1 of the protrusion 6d. Because the contact of the cleaning body 42 with the protrusion 6d is repeated as the rotary cleaning body 4 rotates, the dust captured by the protrusion 6d is more likely to move toward the front end 6d1 of the protrusion 6d. Because this occurs for the pair of protrusions 6d, it is possible to prevent dust from accumulating at both axial ends of the rotary cleaning body 4. The pair of left and right protrusions 6d are provided with a gap at the center in the left-right direction, so that the space between the pair of protrusions 6d faces the communication opening 6c, preventing a decrease in suction force and enabling the dust moving along the protrusions 6d to be sucked in. When there are protrusions 6d on both sides of the center of the rotating cleaning body 4, the angle C between the protrusions 6d and the axis L5 when viewed from the cleaning surface side (see (a) of Figure 5) is smaller than the spiral angle of the cleaning body 42 (angle B shown in (c) of Figure 5).

[0023] As shown in FIG. 1, the suction tool body 6 includes a body 60, a joint 65, and a connecting pipe 67. When viewed from the cleaning surface side, the main body 60 has a "T" shape, with a horizontal extension portion 60a extending in the left-right direction and a vertical extension portion 60b extending in the front-to-back direction, as shown in Figures 5(a) and 5(b). The horizontally extending portion 60a is provided with a suction port 6a and a rotary cleaning body chamber 6b, and the vertically extending portion 60b is provided with a joint 65. 3, the drive chamber 6e is provided at the rear portion of the rotary cleaning element chamber 6b on the other side (right side) of the vertical extension portion 60b of the horizontal extension portion 60a, and at the other end (right end) in the left-right direction of the horizontal extension portion 60a on the outer side of the rotary cleaning element chamber 6b. A drive output portion 51 is provided at the rear side of the rotary cleaning element chamber 6b, and a drive input portion 52 is provided at the right side of the rotary cleaning element chamber 6b. The support chambers 6f are located on both the left and right sides of the rotary cleaning body chamber 6b in the horizontal extension portion 60a. The one-end support unit 55 (see FIG. 3) is disposed on the right side of the horizontal extension portion 60a and shares the space in the drive chamber 6e with the drive output unit 51. The other-end support unit 56 (see FIG. 4) is disposed on the left side of the horizontal extension portion 60a. The communication passage 6 g is disposed between the joint 65 and the connecting pipe 67 .

[0024] 3 and 4, the suction tool body 6 includes a lower case 61, an upper case 63, a joint 65, and a connecting pipe 67. The lower case 61 and the upper case 63 form a main body 60.

[0025] The lower case 61 has a front base portion 611 that extends in the left-right direction and has an intake port 6a, a rear base portion 612 that extends rearward from the central part of the front base portion 611 in the left-right direction, a front cover portion 613 that covers the intake port 6a of the front base portion 611, and a lower extension portion 614 that is provided on the rear side of the front base portion 611 and on one side (right side) of the rear base portion 612. In front base portion 611, bumper 621 is attached to the front wall that forms the front end of suction tool body 6, and airtight member 623 is attached to the bottom wall that forms the rear end and left and right ends of suction port 6a. Airtight member 623 is a brush fixed to the bottom wall. 5, the front base portion 611 has an opening 6p continuous with the suction port 6a on the other side in the left-right direction relative to the rotary cleaning body chamber 6b, and has engagement portions 6q, 6r for detachably mounting the other-end support unit 56 to the opening 6p. This makes it possible to move the rotary cleaning body 4 in and out of the rotary cleaning body chamber 6b by attaching and detaching the other-end support unit 56. The airtight member 623 on the other end (left side) is attached to the other-end support unit 56 (see FIG. 4).

[0026] As shown in Figures 1 to 4, rear base portion 612 supports joint 65 rotatably around a rotation axis in the front-rear direction. Wheels 624 that assist movement of suction tool 3 in the front-rear direction are attached to rear base portion 612. As shown in Figure 3, rear base portion 612 is provided with lower fixing portion 626 for fixing fixing portion 651 of joint 65. As shown in Fig. 5(b), the front cover part 613 has a rear wall 6h standing upright from the rear end of the suction port 6a, and an upper wall 6j that connects the upper end of the rear wall 6h to the front end of the suction port 6a in an arc shape. The rear wall 6h and the upper wall 6j form the rear wall (6h) and the upper wall (6j) of the rotary cleaning body chamber 6b, and an opening 6k for the communication port 6c is provided in the rear wall 6h (see Fig. 5(b)). The lower extension 614 extends rearward from the front base 611 and is connected to one side (the right side) of the rear base 612.

[0027] As shown in Figures 3 and 4, the upper case 63 has a middle cover portion 631 that covers the rear side of the front cover portion 613 in the lower case 61, an end cover portion 632 that covers both left and right sides of the front cover portion 613 in the lower case 61, a rear cover portion 633 that extends rearward from the middle of the middle cover portion 631 in the left and right direction and covers the front part of the joint 65, and an upper extension portion 634 provided on one side (right side) of the middle cover portion 631 in the left and right direction. The middle cover part 631 has a bulging upward central part in the left-right direction, and a support part 635 for supporting the LED 625 is provided inside the bulging part, and the cover body 64 is attached to the front side of the bulging part. The end cover portion 632 extends forward from the front end of the middle cover portion 631 in an arc shape. The upper protruding portion 634 extends rearward from the middle cover portion 631, and one side (the right side) is connected to the middle cover portion 631 and the rear cover portion 633. The rear cover portion 633 bulges upward in an arc shape, and an upper fixing portion 636 for fixing a fixing portion 651 of the joint 65 is provided on the inside thereof. The left and right ends and lower protrusion 614 of the front base portion 611 of the lower case 61, and the end cover portion 632 and upper protrusion 634 of the upper case 63 form a drive chamber 6e and a support chamber 6f.

[0028] The joint 65 has a fixed part 651 fixed to the lower fixed part 626 of the lower case 61 and the upper fixed part 636 of the upper case 63, and a front communicating passage part 653 rotatably attached to the fixed part 651 with the front-to-rear direction as the rotation axis and forming the front part of the communicating passage 6g. The joint 65 has a communication hole 654 that communicates between the drive chamber 6e and the inside of the communication passage 6g. Here, as shown in FIG. As a result, when the electric blower of the vacuum cleaner body 1 is driven, negative pressure is created inside the communication passage 6g, and outside air is drawn in through the air intake port 637 of the upper protrusion 634 of the upper case 63. The drawn-in air cools the motor 511 of the drive unit 50 and flows into the communication passage 6g through the communication hole 654. Note that, because the communication passage 6g is under negative pressure, dust drawn in through the suction port 6a does not flow into the drive chamber 6e.

[0029] The connecting pipe 67 is attached to the joint 65 so as to be rotatable about a rotation axis that is perpendicular to the central axis extending in the front-rear direction of the joint 65, and forms the rear portion of the communication passage 6g.

[0030] 3. Dust movement The movement of dust will be explained with reference to FIG. FIG. 7 is a view from above showing a state in which the upper wall 6j of the front cover part 613 has been removed, leaving the protrusion 6d. 7(a) illustrates an example in which dust 9 is present at the left-right end (left side) of the rotary cleaning body chamber 6b. Without the protrusion 6d, the dust 9 tends to rotate in this vicinity in the direction of arrow L10 along the rotation direction of the rotary cleaning body 4 and accumulate without moving toward the left-right center. This is thought to be because the suction force at the left-right ends is weaker than the suction force toward the left-right center (the suction force that moves the dust toward the center). The suction tool 3 of this embodiment has at least one of the left and right protrusions 6d, and the left protrusion 6d will be described as an example. As the rotary cleaning body 4 rotates, the cleaning bodies 42 come into contact with the protrusion 6d. When viewed from above, the protrusion 6d is inclined so that it moves forward in the front-to-rear direction from the left-to-right end toward the center. In other words, the cleaning bodies 42 in one row are configured to come into contact with the protrusion 6d from the rear side at the left-to-right end. As a result, dust 9 present around the rotary cleaning body 4 at the left-to-right end is captured on the rear side of the protrusion 6d (see FIG. 7(a)). As the rotary cleaning body 4 rotates, the cleaning bodies 42 in one row change their contact position with the protrusion 6d toward the front end 6d1 of the protrusion 6d. As a result, the dust 9 captured by the protrusion 6d is pushed along the protrusion 6d toward the front end 6d1 by the pressure of the cleaning body 42, and as shown in (b) of Figure 7, the dust 9 moves toward the center in the left-right direction along the protrusion 6d. Furthermore, as the rotary cleaning body 4 rotates, the dust 9 moves further along the protrusion 6d toward the center in the left-right direction, as shown in Fig. 7(c). Because the center in the left-right direction faces the communication opening 6c, the suction force is stronger than at the ends, and the dust 9 is sucked into the communication opening 6c. Although the movement of one row of cleaning bodies 42 and dust 9 has been described here, if the rotating cleaning body 4 has multiple rows of cleaning bodies 42, the frequency with which the cleaning bodies 42 come into contact with the protrusion 6d increases, thereby improving the effect of moving the dust 9 toward the center in the left-right direction along the protrusion 6d.

[0031] Second Embodiment The protrusions 6d in the first embodiment are provided on at least one of the left and right sides of the center line C1. However, there may be a plurality of protrusions extending from the ends in the left and right (axial) direction to the center, and the case where there are a plurality of protrusions will be described as a second embodiment. In addition, when the reference numerals of the components in the second embodiment are different from those in the first embodiment, the reference numerals will be explained by adding "2000" to the reference numerals of the components, for example, protrusion 2006d. The protrusion 2006d will be mainly described below with reference to Figure 8. Figure 8 shows a top view of the device with the front cover removed, leaving only the protrusion 2006d.

[0032] A suction tool 2003 of the second embodiment is provided with a rotary cleaning body 4 in a suction tool body 2006, and a rotary cleaning body chamber 2006b of the suction tool body 2006 has a protrusion 2006d. The protrusion 2006d protrudes from the inner wall (for example, the upper wall 6j) of the rotary cleaning element chamber 2006b so as to come into contact with the cleaning element 42 of the rotary cleaning element 4. The protrusions 2006d are, for example, located on both sides of the center in the left-right direction of the rotary cleaning element chamber 2006b, and a plurality of (for example, three) protrusions 2006d are arranged on one side of the center. Each protrusion 2006d extends at an angle from the axial end of the rotary cleaning body 4 toward the center so as to move away from the communication opening 2006c in the front-to-rear direction (toward the front in the front-to-rear direction). The multiple protrusions 2006d on one side are arranged so that they gradually approach the communication opening 2006c. More specifically, the protrusions 2006d on the central side are arranged closer to the communication opening 2006c than the protrusions 2006d on the end sides.

[0033] The multiple protrusions 2006d on one side are arranged so as to approach an imaginary plane P including the opening edge of the communication opening 6c as they move from the left-right end toward the center. In other words, they are arranged so as to move rearward in the front-rear direction (closer to the communication opening 6c) as they move from the left-right end toward the center. Furthermore, an imaginary line L7 passing through the center of the extension direction of each of the multiple protrusions 2006d on one side (or the two protrusions 200d located at both ends in the left-right direction) is inclined so as to approach the communication opening 6c in the front-rear direction (downward) as it moves from the left-right end toward the center. This results in a larger distance between two protrusions 2006d arranged side by side and spaced apart in the left-right direction than when the multiple protrusions 2006d are arranged parallel to the left-right direction (when the imaginary line L7 is parallel to the axis L5), allowing large dust particles 2009A to pass between the protrusions 2006d (see arrow L9 in FIG. 8 ). That is, it is possible to prevent large dust particles 2009A from getting stuck between the protrusions 2006d. When viewed from above, the imaginary line L7 intersects with the axis L5 at an angle of 45 degrees or less, for example, 30 degrees. In other words, the imaginary line L7 intersects with an imaginary plane H that passes through the rotation axis (axis L5) of the rotary cleaning body 4 and is parallel to the direction of gravity. 8, as shown by arrow L8 on the right side of suction tool 2003 in the left-right direction (left side in FIG. 8), central protrusion 2006d is set back relative to end protrusions 2006d, so that dust 2009B that has moved from the left-right end side to the center along each protrusion 2006d can easily head directly toward communication opening 6c without getting caught on central protrusion 2006d, even if it leaves end protrusion 2006d. Also, as central protrusion 2006d is set back relative to end protrusions 2006d in the left-right direction, a decrease in suction force from communication opening 6c can be prevented, and a large amount of dust can be sucked in.

[0034] The multiple protrusions 2006d on one side are arranged side by side in the left-right direction. As shown in Fig. 8, of two protrusions 2006d adjacent to each other in the left-right direction of suction tool 2003, it is preferable that the inner end in the left-right direction of the outer protrusion 2006d and the outer end in the left-right direction of the inner protrusion 2006d are positioned on an imaginary line in the front-rear direction. Specifically, the inner left-right end of the outer protrusion 2006d1 and the outer left-right end of the inner protrusion 2006d2 are located on the front-to-back imaginary line T1, and the inner left-to-right end of the outer protrusion 2006d2 and the outer left-to-right end of the inner protrusion 2006d3 are located on the front-to-back imaginary line T2. In this example, the ends of two adjacent protrusions 2006d are aligned on the virtual line, but they may overlap in the left-right direction.

[0035] The multiple protrusions 2006d on one side are provided continuously in the front-to-rear direction. "Continuous" here means that, as shown in Fig. 8, of two protrusions 2006d adjacent to each other in the front-to-rear direction of suction tool 2003, the rear end of the protrusion 2006d located on the front side and the front end of the protrusion 2006d located on the rear side are positioned on an imaginary line in the left-to-right direction, with no gap between them in the front-to-rear direction. Specifically, the rear end of the protrusion 2006d1 located on the front side and the front end of the protrusion 2006d2 located on the rear side are located on the left-right imaginary line Y1, and the rear end of the protrusion 2006d2 located on the front side and the front end of the protrusion 2006d3 located on the rear side are located on the left-right imaginary line Y2. In this example, the ends of two adjacent protrusions 2006d are aligned on the imaginary line, but they may overlap in the front-to-rear direction.

[0036] Of the multiple protrusions 2006d on one side, the protrusion 2006d3 located at the most central side in the left-right direction is located on the end side of the communication opening 6c in the left-right direction, as shown in FIG.

[0037] <<Modifications>> Although the first and second embodiments have been described above, it goes without saying that the present invention is not limited to these embodiments. The following modifications may also be included in the present invention. 1. Vacuum cleaner The electric vacuum cleaner X in the embodiment is a stick type, but it may also be a handheld type electric vacuum cleaner having a vacuum cleaner body and a suction tool 3, or a canister type electric vacuum cleaner having a vacuum cleaner body with wheels, a hose, an extension tube, and a suction tool 3. The vacuum cleaner may also be a wet type that can suck up both air and liquid.

[0038] 2. Suction tool (1) The cleaning body 42 of the rotating cleaning body 4 is inclined so as to move to one side or the other in the circumferential direction as it moves from one end in the axial direction to the other end, but it may be parallel to the axis L5, or may be inclined in a "V" shape, with the central side in the axial direction being convex and moving to one side or the other in the circumferential direction as it moves from both ends in the axial direction to the center. Although a plurality of cleaning elements 42 (four elements) are provided in the above embodiment, one element may be provided. (2) The rotating cleaning body 4 is rotated by the drive unit 50, but it may also be rotated by friction with the cleaning surface by moving the suction tool 3, 2003 back and forth. In other words, the protrusions 6d, 2006d only need to come into contact with the cleaning body 42 of the rotating rotating cleaning body 4, and the method of driving the rotating cleaning body 4 is not particularly limited. (3) The intake port 6a is provided on the bottom side so as to straddle the front part of the bottom surface and the lower part of the front surface, but it may also be provided on the bottom surface (front, middle, rear, front side, intermediate side, rear side). (4) The protrusions 6d, 2006d protrude in a rib-like shape, but may also be stepped and protrude downward or toward the rotary cleaning body in the rotation direction of the rotary cleaning body 4. In other words, the upper wall 6j (inner wall) may protrude downward, and its protruding lower end may have an arc shape along the rotation direction. The edge of the protrusion 6d on the central side in the left-right direction is tapered in an inclined manner, but it may be stepped (right-angled) or may be shaped to protrude backward in an arc. (5) When viewed from the top and bottom, the protrusions 6d, 2006d are inclined so as to move away from the communication opening 6c in a linear manner as they move from the left and right ends toward the center, but they may also be inclined so as to move away in a curved manner, or they may have one or more sets of linearly extending portions and curvedly extending portions. (6) As shown in Figure 5(a) or Figure 8, the protrusions 6d, 2006d extend in a straight line when viewed from the side perpendicular to the cleaning surface, but they may also have a series of multiple straight lines with different slopes or curves with no extreme values, or a series of multiple straight lines with different slopes and curves with no extreme values. (7) As shown in FIG. 8, the multiple protrusions 2006d have the same shape, but the inclination angles of each may be different, or one protrusion 2006d may be straight and the other protrusions 2006d may be curved, or vice versa. (8) The lower case 61 has the front cover portion 613 integrally therewith, but a portion corresponding to the front cover portion 613 may be provided in the opening between the end cover portions 632 of the upper case 63 . (9) The protrusion 6d has the curved portion 6d5 and the straight portion 6d6, but it does not have to have the curved portion 6d5 or the straight portion 6d6. (10) When multiple protrusions are arranged from one end in the left-right direction (axial direction) to the center, two adjacent protrusions 2006d in the left-right direction are arranged so that the ends in the front-to-back direction and the left-to-right direction coincide or partially overlap, but they may also overlap in the front-to-back direction, as in protrusion 3006d in Figure 9(a). When multiple protrusions 2006d, 3006d are arranged, the protrusion amount of the protrusions may or may not change as they move outward in the left-right direction. If the protrusion amount changes, the protrusion amount may increase or decrease as it moves outward, or may alternate between large and small. (11) The multiple protrusions 2006d on one side are provided continuously in the axial direction and the front-rear direction, but may be discontinuous in at least one of the axial direction and the front-rear direction. (12) The protrusion 6d extends so as to pass through the rotation axis (axis line L5) of the rotating cleaning body 4 and intersect with an imaginary plane H that is parallel to the direction of gravity, but the protrusion 4006d may be located behind (see (b) of Figure 9) or in front of the imaginary plane H so as not to intersect with the imaginary plane H. (13) Although one protrusion 6d, 4006d was provided in the rotational direction of the rotary cleaning body 4, multiple protrusions may be provided. They are preferably spaced apart in the rotational direction by a distance of 20 to 50 degrees. Furthermore, when multiple protrusions are provided in the rotational direction, the amount of protrusion may or may not change as the protrusion advances in the rotational direction. If the amount of protrusion changes, the amount of protrusion may increase or decrease as the protrusion advances in the rotational direction, or may alternate between increasing and decreasing. (14) The protrusion amount of the protrusions 6d, 2006d, 3006d, and 4006d was constant, but for example, the protrusion amount may be increased or decreased as the axial direction moves from the end side to the center side, or the amount may be increased or decreased repeatedly. When the protrusion amount of the cleaning element 42 of the rotary cleaning element 4 changes, the protrusion amount of the protrusion may be changed in response to the change. (15) Although the communication port 6c is arranged in the fixed portion 651 of the joint 65, for example, the opening 6k in the rear wall 6h of the main body 60 of the suction tool main body 6 may be the communication port 6c. (16) The protrusion may be provided at a position shifted around the axis (axis line) in the rotational direction or counter-rotational direction of the rotary cleaning body 4 relative to the protrusion 6d of the first embodiment.

[0039] 3.Direction Although the one end in the axial direction is the right end when the suction tool is viewed from the front, it may be the left end.

[0040] <<Invention>> The above-described embodiment and modifications include at least the following inventions. Each of the following inventions is not bound by the specific features or configurations of the embodiments of other inventions.

[0041] <Inventions 1 and 2> 1. Prior art JP 2019-25289 A discloses a suction tool for an electric vacuum cleaner that has a protruding portion that protrudes from a partition wall that separates a front space where a rotating brush is arranged from a rear space where a communication port is located toward the rotating brush (rotating cleaning body) and comes into contact with the rotating brush.

[0042] 2. Problems that Inventions 1 and 2 aim to solve The above suction tool has a problem in that the further away from the center of the rotary brush is from the end in the axial direction, the more difficult it becomes for dust to be drawn into the communication opening. That is, dust particles on both ends of the rotary brush in the axial direction have difficulty reaching the communication opening and tend to remain on the ends. The present invention 1 aims to realize a suction tool and a vacuum cleaner that can easily collect dust on the end side in the axial direction.

[0043] 3. Invention 1 (1A) 1A suction tool The suction tool No. 1A is a rotating cleaning element having a cleaning element; a drive unit that is a drive source for rotating the rotary cleaning body; a suction tool body having a rotary cleaning body chamber in which the rotary cleaning body is rotatably disposed; Equipped with The suction tool body is An intake port located on the bottom side, a communication port located on the central side in the axial direction of the rotary cleaning body and located rearward of the axis of the rotary cleaning body in a direction perpendicular to the axial direction; a protrusion protruding from a wall of the rotary cleaning body chamber and contacting the cleaning body, The protrusion extends at an incline from one end toward the center in the axial direction so as to move away from the front side with respect to an imaginary plane including the opening edge of the communication port. This makes it possible to realize a suction tool that easily collects dust on the axial end side. The number of protrusions may be one or more.

[0044] (1B) 1B suction tool The suction tool No. 1B is a rotating cleaning element having a cleaning element; a drive unit that is a drive source for rotating the rotary cleaning body; a suction tool body having a rotary cleaning body chamber in which the rotary cleaning body is rotatably disposed; Equipped with The suction tool body is An intake port located on the bottom side, a communication port located on the central side in the axial direction of the rotary cleaning body and located rearward of the axis of the rotary cleaning body in a direction perpendicular to the axial direction; a protrusion protruding from a wall of the rotary cleaning body chamber and contacting the cleaning body, The protrusion extends obliquely in the axial direction from one end toward the center so that the center is located closer to the communication port than the one end in the orthogonal direction. This makes it possible to realize a suction tool that easily collects dust on the axial end side. The number of protrusions may be one or more.

[0045] (1C) 1C suction tool The suction tool for No. 1C is a rotating cleaning element having a cleaning element; a drive unit that is a drive source for rotating the rotary cleaning body; a suction tool body having a rotary cleaning body chamber in which the rotary cleaning body is rotatably disposed; Equipped with The suction tool body is An intake port located on the bottom side, a communication port located on the central side in the axial direction of the rotary cleaning body and located rearward of the axis of the rotary cleaning body in a direction perpendicular to the axial direction; a protrusion protruding from a wall of the rotary cleaning body chamber and contacting the cleaning body, The protrusion extends obliquely in the axial direction from one end toward the center so as to be positioned forward of an imaginary line that passes through the one end in the orthogonal direction and is parallel to the axial line. This makes it possible to realize a suction tool that easily collects dust on the axial end side. The number of protrusions may be one or more.

[0046] (1D) 1D suction tool The suction tool No. 1D is a rotating cleaning element having a cleaning element; a drive unit that is a drive source for rotating the rotary cleaning body; a suction tool body having a rotary cleaning body chamber in which the rotary cleaning body is rotatably disposed; In a suction tool of an electric vacuum cleaner comprising: The suction tool body is An intake port located on the bottom side, a communication port located on the central side in the axial direction of the rotary cleaning body and located rearward of the axis of the rotary cleaning body in a direction perpendicular to the axial direction; a protrusion protruding from an inner wall of the rotary cleaning body chamber and contacting the cleaning body, The protrusion extends so that its extension direction intersects with the axial direction, and as it moves from one end toward the center in the axial direction, the front end is located further forward than the rear end in the fore-and-aft direction. This makes it possible to realize a suction tool that easily collects dust on the axial end side. The number of protrusions may be one or more.

[0047] (2) Second suction tool The second suction tool is a suction tool 1A to 1D (hereinafter referred to as "first"), A plurality of the protrusions are arranged between both ends in the axial direction. The multiple protrusions here include at least the following cases: two protrusions arranged on the left and right sides of the first embodiment; multiple protrusions arranged on one side of the second embodiment; multiple protrusions arranged on both sides of the second embodiment and multiple protrusions arranged on one side; and a case where one side in the axial direction is a protrusion of the first embodiment and the other side in the axial direction is a protrusion of the second embodiment.

[0048] (3) Third suction tool The third suction tool is the first or second suction tool, A plurality of the protrusions are arranged from the one end side to the center side in the axial direction, The plurality of protrusions are arranged so that the perpendicular direction approaches the virtual plane as they move from the one end side to the center side, or the front-to-rear direction approaches the communication port as they move from the one end side to the center side. This increases the distance between adjacent protrusions, allowing larger debris to pass through.

[0049] (4) Fourth suction tool The fourth suction tool is the first to third suction tools, The protrusion is located on an end side of the communication port in the axial direction. This makes it easier to suck in dust that has moved along the protrusion toward the center in the axial direction.

[0050] (5) Fifth suction tool The fifth suction tool is the second to fourth suction tools, Of the plurality of protrusions, the protrusion located at the most central side in the axial direction is located on the end side of the communication port in the axial direction. This makes it easier to suck in dust that has moved toward the center in the axial direction along the protrusion, and also makes it possible to prevent a decrease in suction force from the communication opening. In addition, the phrase "located closer to the end than the communication port" here includes the case where part of the protrusion is located closer to the center than the communication port, and it is sufficient that the central position of the protrusion in the axial direction is closer to the end than the communication port in the axial direction.

[0051] (6) Sixth suction tool The sixth suction tool is the first to fifth suction tools, The protrusion has a curved portion that is curved along the rotation direction of the rotary cleaning body. This allows the protrusion to come into contact with the rotary cleaning element over a wide area. The curved portion referred to here may exist in the entire area from one end to the other end in the axial direction of the protrusion, or may exist in one or more areas from one end to the other end in the axial direction.

[0052] (7) Seventh suction tool The seventh suction tool is the first to sixth suction tools, The protrusion extends so as to intersect with an imaginary plane that passes through the rotation axis of the rotary cleaning body and is parallel to the direction of gravity. This allows the protrusion to come into contact with the rotary cleaning element over a wide area.

[0053] (8) Eighth suction tool The eighth suction tool is any of the first to seventh suction tools, the protrusion has a first portion located closer to the center than the communication port in the axial direction and a second portion located closer to the end than the communication port, The second portion is longer than the first portion. This makes it easier to collect dust on the end side in the axial direction.

[0054] (9) The first vacuum cleaner The first vacuum cleaner is provided with any one of the first to eighth suction tools. This makes it possible to realize an electric vacuum cleaner equipped with a suction tool that can easily collect dust on the end side in the axial direction.

[0055] 4. Invention 2 (1A) 1A suction tool The suction tool No. 1A is a rotating cleaning element having a cleaning element; a drive unit that is a drive source for rotating the rotary cleaning body; a suction tool body having a rotary cleaning body chamber in which the rotary cleaning body is rotatably disposed; Equipped with The suction tool body is An intake port located on the bottom side, a communication port located on the central side in the axial direction of the rotary cleaning body and located rearward of the axis of the rotary cleaning body in a front-rear direction perpendicular to the axial direction; a protrusion protruding from the wall of the rotary cleaning body chamber and contacting the cleaning body; and The protrusion extends so that its extension direction intersects with the axial direction, and as it moves from one end toward the center in the axial direction, the front end is located further forward than the rear end in the fore-and-aft direction. This makes it possible to realize a suction tool that can easily collect dust on the end side in the axial direction. The number of protrusions may be one or more.

[0056] (1B) 1B suction tool The suction tool No. 1B is a rotating cleaning element having a cleaning element; a drive unit that is a drive source for rotating the rotary cleaning body; a suction tool body having a rotary cleaning body chamber in which the rotary cleaning body is rotatably disposed; Equipped with The suction tool body is An intake port located on the bottom side, a communication port located on the central side in the axial direction of the rotary cleaning body and located rearward of the axis of the rotary cleaning body in a direction perpendicular to the axial direction; a protrusion protruding from a wall of the rotary cleaning body chamber and contacting the cleaning body, The protrusion extends in the axial direction from one end toward the center, inclining away from the front side with respect to an imaginary plane including the opening edge of the communication port. This makes it possible to realize a suction tool that can easily collect dust on the end side in the axial direction. The number of protrusions may be one or more.

[0057] (1C) 1C suction tool The suction tool for No. 1C is a rotating cleaning element having a cleaning element; a drive unit that is a drive source for rotating the rotary cleaning body; a suction tool body having a rotary cleaning body chamber in which the rotary cleaning body is rotatably disposed; Equipped with The suction tool body is An intake port located on the bottom side, a communication port located on the central side in the axial direction of the rotary cleaning body and located rearward of the axis of the rotary cleaning body in a direction perpendicular to the axial direction; a protrusion protruding from a wall of the rotary cleaning body chamber and contacting the cleaning body, The protrusion extends obliquely in the axial direction from one end toward the center so that the center is located closer to the communication port than the one end in the orthogonal direction. This makes it possible to realize a suction tool that can easily collect dust on the end side in the axial direction. The number of protrusions may be one or more.

[0058] (1D) 1D suction tool The suction tool No. 1D is a rotating cleaning element having a cleaning element; a drive unit that is a drive source for rotating the rotary cleaning body; a suction tool body having a rotary cleaning body chamber in which the rotary cleaning body is rotatably disposed; Equipped with The suction tool body is An intake port located on the bottom side, a communication port located on the central side in the axial direction of the rotary cleaning body and located rearward of the axis of the rotary cleaning body in a direction perpendicular to the axial direction; a protrusion protruding from a wall of the rotary cleaning body chamber and contacting the cleaning body, The protrusion extends obliquely in the axial direction from one end toward the center so as to be positioned forward of an imaginary line that passes through the one end in the orthogonal direction and is parallel to the axial line. This makes it possible to realize a suction tool that can easily collect dust on the end side in the axial direction. The number of protrusions may be one or more.

[0059] (2) Second suction tool The second suction tool is a suction tool 1A to 1D (hereinafter referred to as "first"), It is continuous from the rear end to the front end. This allows the dust to move smoothly along the protrusions. In other words, if there are discontinuous portions, the dust will get caught in the discontinuous portions and will not be able to move smoothly.

[0060] (3) Third suction tool The third suction tool is the first or second suction tool, When viewed from the cleaning surface side, the slope of the tangent of the protrusion does not reverse between positive and negative. This allows the dust to move smoothly along the protrusion. (4) The first vacuum cleaner The first vacuum cleaner includes any one of the first to third suction tools. This makes it possible to realize an electric vacuum cleaner equipped with a suction tool that can easily collect dust on the end side in the axial direction.

[0061] <Invention 3> 1. Prior art Japanese Patent Application Laid-Open Publication No. 2019-25289 discloses a suction tool for an electric vacuum cleaner, which has a rotating brush and a motor that drives the rotating brush mounted on a main body. 2. Problems that Invention 2 aims to solve In the above suction tool, the temperature of the motor tends to rise. Invention 2 provides a suction tool and a vacuum cleaner that can suppress a rise in motor temperature. 3. Invention 3 (1) First suction tool The first suction tool is A suction tool for a vacuum cleaner, a rotating cleaning element having a cleaning element; a drive unit including a motor for rotating the rotary cleaning body; a suction tool body having a suction port; Equipped with The suction tool body is a rotary cleaning body chamber for the rotary cleaning body; a drive chamber for the drive unit; a communication passage for communicating the rotary cleaning chamber with the main body of the electric vacuum cleaner; and The drive chamber has an intake port for communicating with the outside, The suction tool body has a communication hole for communicating the communication passage with the drive chamber. As a result, when the communication passage becomes negative pressure, air is drawn in through the intake port and passes through the drive chamber into the communication passage, thereby suppressing a rise in the temperature of the motor. In the embodiment, the communication hole is formed in the joint having part of the communication passage, but part of the communication passage may be disposed in the case that forms the drive chamber, and the communication hole may be formed in the case. In the embodiment, the air intake is arranged in the upper case, but it may be arranged in the lower case, or in both the upper case and the lower case.

[0062] (2) Second suction tool The second suction tool is A suction tool for a vacuum cleaner, a rotating cleaning element having a cleaning element; a drive unit including a motor for rotating the rotary cleaning body; a suction tool body having a suction port; Equipped with The suction tool body is a rotary cleaning body chamber for the rotary cleaning body; a drive chamber for the drive unit; and The drive chamber has an intake port for communicating with the outside, The suction tool body has a communication hole for communicating between the rotary cleaning body chamber and the drive chamber. As a result, when the rotary cleaning body chamber is under negative pressure, air is drawn in from the air intake port and passes through the drive chamber into the rotary cleaning body chamber, thereby suppressing a rise in temperature of the motor.

[0063] <Other> Each invention focuses on the above-mentioned invention-specifying matters, and may or may not include the invention-specifying matters of other inventions. The same applies to inventions described in the specification other than inventions 1 to 3. [Explanation of symbols]

[0064] 1 vacuum cleaner body 3 Suction tool 4 Rotating cleaning body 6 Suction tool body 6a Intake port 6b Rotating cleaning chamber 6c communication port 6d protrusion

Claims

1. a rotating cleaning element having a cleaning element; a drive unit that rotates the rotary cleaning body; a suction tool body having a rotary cleaning body chamber in which the rotary cleaning body is rotatably disposed; In a suction tool of an electric vacuum cleaner comprising: The suction tool body is An intake port located on the bottom side, a communication port located on the central side in the axial direction of the rotary cleaning body and located rearward of the axis of the rotary cleaning body in a direction perpendicular to the axial direction; a protrusion protruding from an inner wall of the rotary cleaning body chamber and contacting the cleaning body; and When a direction parallel to the axial direction is defined as a left-right direction, the left-right end of the protrusion is located outside the axial end of the cleaning element in the left-right direction. Suction tool.

2. The rear wall of the rotary cleaning chamber is approximately perpendicular to the cleaning surface, The inner wall is arc-shaped, the rear end of the inner wall is connected to the upper end of the rear wall; The suction tool according to claim 1.

3. The protrusion is a curved portion that curves in the rotation direction of the rotary cleaning body; A straight-shaped portion extending in the front-rear direction; and The protrusion protrudes downward from the inner wall in a rib-like shape. The suction tool according to claim 2.

4. the curved portion protrudes from the inner wall; The straight-shaped portion protrudes from the inner wall and the rear wall. The suction tool according to claim 3.

5. The amount of protrusion of the front end of the protrusion decreases toward the end in the left-right direction. The suction tool according to claim 4.

6. An electric vacuum cleaner comprising the suction tool according to any one of claims 1 to 5.

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