Suction tools and electric vacuum cleaners

Abstract

To create a suction device that makes it easier to remove dust from at least one of the left or right sides of the intake port. [Solution] The suction device is connected to an electric blower that generates suction force and comprises a suction device body having a suction port provided on the bottom side. The suction device body has first fixed cleaning sections 71 and 72 on the bottom walls 601 and 602, which are arranged in the left-right direction alongside the suction port 6a. The first fixed cleaning sections 71 and 72 extend from the front to the rear so as they approach the suction port 6a.

Description

Technical Field

[0001] The present invention relates to a suction tool and a vacuum cleaner including a rotary cleaning body.

Background Art

[0002] Patent Document 1 discloses a suction tool for a vacuum cleaner that has a groove communicating with a suction port on the side surface of a suction space having a communication port, thereby removing dust on the left and right sides of the suction port.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The above suction tool was not sufficient to remove at least one of the dust on the left and right sides of the suction port. An object of the present invention is to realize a suction tool that can easily remove at least one of the dust on the left and right sides of the suction port.

Means for Solving the Problems

[0005] The suction tool according to the present invention includes a suction tool body that communicates with an electric blower that generates a suction force and has a suction port provided on the bottom side. The suction tool body has a first fixed cleaning portion provided on the bottom wall so as to be arranged in the left-right direction with the suction port, and the first fixed cleaning portion extends so as to approach the suction port from the front side to the rear side.

Effects of the Invention

[0006] According to the above configuration, it becomes easier to remove at least one of the dust on the left and right sides of the suction port.

Brief Description of the Drawings

[0007] [Figure 1] This is a perspective view of the vacuum cleaner according to the embodiment. [Figure 2] This is a cross-sectional view of the suction device perpendicular to the left-right direction. [Figure 3] This is a perspective view of the disassembled suction device, seen from the front and above. [Figure 4] (a) is a perspective view of the suction device seen from the front and below, and (b) is a perspective view of the suction device inverted vertically, with a portion of the rotating cleaning body cut out in both (a) and (b). [Figure 5] (a) is a view of the rotating cleaning body from above, (b) is a view of the suction device body from the cleaning surface side, and (c) is a view of the suction device body from the front of a cross section perpendicular to the front-to-back direction. [Figure 6] This is a perspective view illustrating the one-end support unit and the drive unit. [Figure 7] This is a perspective view illustrating the attachment of the main unit to the cover. [Figure 8] This is a perspective view illustrating the installation of the first fixed cleaning unit, with (a) showing the right side of the suction device and (b) showing the left side of the suction device. [Figure 9] This diagram illustrates the movement of dust from side to side of the suction nozzle. [Figure 10] This diagram illustrates dust moving along a protruding body inside a suction device. [Figure 11] (b) is a perspective view of the suction device of the second embodiment, seen from the front and below, where (b) is a view of the suction device with the rotating cleaning body removed, and a part of the rotating cleaning body is cut out in (a). [Figure 12] This diagram illustrates the movement of dust in the modified projection, showing the structure with the projection remaining but the upper wall removed, viewed from above. [Figure 13] This is a diagram illustrating a modified example of a protruding body. [Figure 14] This is a perspective view illustrating the attachment of the modified cover to the main body. [Figure 15] This is a diagram illustrating the first fixed cleaning section and groove section related to a modified example. [Figure 16] (a) is a side view of a handheld vacuum cleaner, and (b) is a front-upper perspective view of the vacuum cleaner with the right side of the case cut out. [Figure 17] (a) is a perspective view of the nozzle in the open position, seen from below and in the front; (b) is a magnified view of the area around the protruding part on the back of the case; and (c) is a magnified view of the front of the case.

[0008] <<Embodiment>> <First Embodiment> 1. Overview As shown in Figure 1, the electric vacuum cleaner X comprises a vacuum cleaner body 1, an extension tube 2, and a suction attachment 3. The vacuum cleaner body 1 includes at least an electric blower that generates suction. The vacuum cleaner body 1 here comprises a housing 11 that houses the electric blower, battery, etc., and a dust collection unit 12 that is detachably attached to the housing 11. A handle 13, an operating unit 14, and an extension pipe connection part 15 are provided on the housing 11. The extension pipe connection part 15 is provided on the other end of the vacuum cleaner body 1. In this embodiment, the dust collection unit 12 is of the cyclone type, but it may also be of the paper bag type, in which case the dust collection unit 12 is provided as part of the housing 11 and is configured integrally. The extension pipe connection part 15 may also be connectable to the suction attachment 3.

[0009] The extension tube 2 has a tubular portion 21. The extension tube 2 has a main body connection portion 22 at one end for detachably connecting to the extension tube connection portion 15 of the vacuum cleaner body 1, and a suction tool connection portion 23 at the other end for detachably connecting to the suction tool 3. The extension tube 2 may be composed of two tubes that are extendable and connectable, or it may be composed of one tube that is not extendable or connectable. The extension tube 2 may also be fixed to at least one of the vacuum cleaner body 1 and the suction tool 3.

[0010] The suction device 3 has a suction device body 6. The suction device body 6 is composed of multiple components, in this case, for example, a main body 60, a fitting 65, and a connecting pipe 67. As shown in FIG. 2, the suction tool 3 includes a suction port 6a provided on the bottom side in the suction tool main body 6. Dust sucked from the suction port 6a is sucked into the cleaner main body 1 via the extension pipe 2 through the communication port 6c of the suction tool main body 6 and the internal communication path 6g as indicated by the arrow in the figure. The suction tool 3 includes a rotatable cleaning body 4 rotatable about an axis in a rotating cleaning body chamber 6b of the suction tool main body 6.

[0011] 2. Suction Tool The electric vacuum cleaner X is for cleaning the floor surface, ceiling, stairs, upper surface of furniture, etc. The following description will be based on the state where the suction tool 3 is cleaning the floor surface, with the cleaner main body 1 on the upper side and the suction tool 3 on the lower side (the state in FIG. 1). Also, taking the virtual line along which the rotation axis of the rotatable cleaning body 4 extends as the axis (L1), as shown in FIG. 4(b), the direction in which the axis extends (including the direction parallel to the axis) is defined as the axial direction or the left - right direction. The right side toward the suction tool 3 is defined as one side or the right side of the axial direction, the direction perpendicular to both the axial direction and the up - down direction is defined as the front - back direction. The side where the suction tool 3 advances due to the rotation of the rotatable cleaning body 4 is defined as the front side, or the side where the user is located during floor cleaning is defined as the rear side.

[0012] As shown in FIG. 3, the suction tool 3 includes a rotatable cleaning body 4 (see FIGS. 2 and 4), support parts 55, 56 for rotatably supporting the rotatable cleaning body 4, a drive part 50 which is a drive source for rotating the rotatable cleaning body 4, and a main body 60 (suction tool main body 6) for housing the rotatable cleaning body 4 and the drive part 50. The suction tool 3 is a so - called power brush type having a drive part 50. Here, the support part 55 is housed in the main body 60, and the support part 56 is provided on the main body 60. The main body 60 is composed of a plurality of members. For example, it is composed of a lower case 61, an upper case 63, and a cover body 69.

[0013] (1) Rotatable Cleaning Body As shown in Figure 5(a), the rotating cleaning body 4 comprises at least a cylindrical rotating body 41 and a cleaning body 42 provided on the outer circumferential surface of the rotating body 41. Here, it further comprises a driven device 43 provided at one end (right end) in the axial direction of the rotating body 41 and a supported device 44 provided at the other end (left end) in the axial direction of the rotating body 41. The rotating body 41 is rotatably mounted relative to the supported device 44. The rotating cleaning body 4 is rotated by the drive unit 50 (see Figure 6) within the rotating cleaning body chamber 6b, with the supported member 44 supported by the support unit 56 (see Figure 7) and the driven member 43 supported by the support unit 55. The cleaning body 42 is positioned to protrude radially outward and extend along the axis of the rotating body 41. This allows the rotating cleaning body 4 to rotate and scrape off dust from the floor surface. The cleaning bodies 42 only need to be arranged in one or more rows, and in this embodiment there are multiple rows (for example, four rows) and they are provided at intervals (for example, equal intervals) in the circumferential direction. The cleaning bodies 42 are provided so as you move from one side (right) in the axial direction of the rotating body 41 to the other side (left), they move along one side (front) or the other side (rear) of the circumferential surface of the rotating body 41. In this embodiment, the cleaning bodies 42 are provided spirally on the rotating body 41. When the cleaning body 42 is viewed from below, the angle B between the extension direction L2 of the cleaning body 42 and the axis (rotation axis) L1 of the rotating cleaning body 4 is in the range of 10 to 25°, and in this case, it is 15°. The cleaning body 42 is made of an elastically deformable material such as fiber or rubber, or a combination thereof. As the rotating cleaning body 4 rotates, the radially extended tip of the cleaning body 42 collides with the protruding body 6d of the rotating cleaning body chamber 6b, as shown in Figure 4(b). As a result, dust attached to the cleaning body 42 is detached (fallen off) from the cleaning body 42.

[0014] (2) Drive unit As shown in Figure 3, the drive unit 50 includes a drive output means 51 that outputs a driving force, a driven mechanism 52 that transmits rotational drive to the rotating cleaning body 4, and a drive transmission means 53 that transmits the driving force of the drive output means 51 to the driven mechanism 52. As shown in Figure 6, the drive output means 51 includes a motor 511 and a gear (output pulley) 512 attached to the rotating shaft (driving shaft) of the motor 511. The driven mechanism 52 includes a fitting body 521 having a protrusion 521a that detachably fits into a recess 43a of the driven device 43 of the rotating 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 wrapped around the gear 512 and the toothed pulley 522. The rotating shaft on the output side (motor 511 side) and the driven shaft on the driven side are supported by bearings 513 and 523, and the fitting body 521 is rotatably supported by a support body 54 that fixes the motor 511.

[0015] (3) Support part The support section has a support section 55 at one end (see Figure 6) that supports the driven member 43 of the rotating cleaning body 4, and a support section 56 at the other end (see Figure 7) that supports the supported member 44 of the rotating cleaning body 4. As shown in Figure 6, the one-end support portion 55 is composed of, for example, a fitting body 521 of the drive unit 50, a support body 54 that rotatably supports the fitting body 521, and the like. The one-end support portion 55 constitutes a part of the drive unit 50. As shown in Figure 7, the other end support portion 56 consists of a fitting portion 6p formed in the support chamber 6f of the main body 60 and a protrusion 691 of the cover body 69 which is detachably provided on the main body 60. The support chamber 6f is provided on the left side relative to the rotating cleaning body chamber 6b, and the fitting portion 6p fits with the rectangular protrusion 44a of the supported member 44 of the rotating cleaning body 4 which is inserted into the support chamber 6f from below. The cover body 69 contacts the protrusion 44a of the rotating cleaning body 4, which fits into the fitting portion 6p, from below.

[0016] (4) Suction device body As shown in Figure 4, the suction device body 6 has at least a suction port 6a located on the bottom side, a rotating cleaning body chamber 6b for housing the rotating cleaning body 4, a communication port 6c for connecting the rotating cleaning body chamber 6b and the vacuum cleaner body 1, and fixed cleaning parts 71, 72, and 73 formed on the bottom wall 600. The suction device body 6 here further includes a protruding body 6d that extends from the inner surface of the wall of the rotating cleaning chamber 6b and contacts the rotating cleaning body 4 (cleaning body 42), and grooves 76 and 77 formed in the bottom wall 600. Furthermore, the ends of the lead wires in the rotating cleaning chamber 6b are marked with black circles to distinguish them from the lead wires of the walls forming that space, and similarly, the ends of the lead wires in other spaces, such as the support chamber 6f (see Figure 7), are also marked with black circles. The suction device body 6 has bumpers 622 and 623 that span the front end (front wall 60a) and the left and right ends (left and right side walls 60h) in the regions on both the left and right sides of the suction port 6a. The bumper on the right side (one side) in the left and right direction may be called the right bumper, and the bumper on the left side may be called the left bumper. The bumpers 622 and 623 are in an "L" shape that is continuous from the front end to each of the left and right ends, but they may also be provided discontinuously from the front end to the left and right ends. The left bumper 623 is provided on the cover body 69 (front wall and left side wall), but depending on the shape of the cover body 69, it can be provided on the lower case 61 or the upper case 63. The bumpers 622 and 623 are provided on the lower side of the front wall 60a and the side wall 60h, and cover the bent portions 713 and 723 (see Figure 8) at one end of the fixed cleaning sections 71 and 72. This makes it difficult for the fixed cleaning sections 71 and 72 to come off.

[0017] (4-1) Inlet As shown in Figure 4, the suction port 6a is provided in correspondence with the rotating cleaning body 4, and in this case, it has a rectangular shape that is elongated in the axial direction of the rotating cleaning body 4. The suction port 6a is provided so as to extend to the rear from the front wall 60a that forms the front end of the suction tool body 6 when viewed from below. The rear end of the suction port 6a is behind the axis L1 of the rotating cleaning body 4 and is at the lower end of the inner surface of the rear wall 60b that constitutes the rotating cleaning body chamber 6b. The front wall 60a of the suction device body 6 has a cutout at its lower end in the area corresponding to the rotating cleaning chamber 6b. This allows for the suction of large dust particles without reducing suction power.

[0018] (4-2) Rotating Cleaning Room As shown in Figure 2, the rotating cleaning chamber 6b houses the rotating cleaning body 4 such that a portion of the rotating cleaning body 4 (the lower end) protrudes from the rotating cleaning chamber 6b toward the cleaning surface. The rotating cleaning chamber 6b has a front wall 60a, a rear wall 60b, and an upper wall 60c. Here, the front wall 60a and the rear wall 60b are approximately parallel and face each other in the front-rear direction, and the upper ends of the front wall 60a and the rear wall 60b are connected by an arc-shaped upper wall 60c.

[0019] As shown in Figure 4(a), the rear wall 60b has a wall portion 60b1 that extends upward from the rear end edge of the suction port 6a, and an overhang portion 60b2 (60b3) that protrudes forward on its upper side. In other words, the space between the wall portion 60b1 and the overhang portion 60b2 and the cleaning surface is made small. This makes it possible to reduce the volume of the rotating cleaning chamber 6b and increase the suction force within the rotating cleaning chamber 6b. As shown in Figures 5(b) and (c), there is at least one protruding section adjacent to the communication opening 6c in the left-right direction, and in this case, there are adjacent sections on both sides in the left-right direction. The protruding section on the right side (one side) in the left-right direction is designated as the right protruding section 60b2, and the protruding section on the left side (the other side) is designated as the left protruding section 60b3.

[0020] The right protrusion 60b2, located on the right side of the rear of the rotating cleaning chamber 6b and housing the drive unit 50, has, as shown in Figure 5(c), a first region 60b21 where the lower wall is parallel to the left-right direction, and a second region 60b22 where the lower wall moves upward as it approaches the center in the left-right direction (i.e., the communication opening 6c). The motor 511 is located behind the first region 60b21. This makes it possible to reduce the front-to-back dimensions on the right side where the drive unit 50 is located. The bottom wall of the first region 60b21 is flat, while the bottom wall of the second region 60b22 slopes upward towards the center and connects to the protruding portion 6c1 at the upper right end of the communication opening 6c. As a result, the air drawn into the vacuum cleaner body 1 along the right-side region of the rear wall 60b is smoothly drawn into the communication opening 6c.

[0021] The left protruding section 60b3 protrudes such that its lower wall moves upward as it approaches the center side in the left-right direction (i.e., the communication opening 6c). The bottom wall of the left protruding section 60b3 slopes upward towards the center and connects to the protruding section 6c1 at the upper left end of the communication opening 6c. As a result, the air being drawn into the vacuum cleaner body 1 along the left side of the rear wall 6h is smoothly drawn into the communication opening 6c.

[0022] (4-3) Communication port As shown in Figure 5(c), the communication port 6c is located on the central side in the left-right direction of the rotating cleaning chamber 6b, and as shown in Figure 5(b), it is located behind the axis L1 of the rotating cleaning body 4. The communication opening 6c has a rectangular shape that is elongated in the left-right direction. The upper sides of both the left and right ends of the communication opening 6c are protruding portions 6c1 that extend forward, as shown in Figures 4(a) and 5(b). As shown in Figures 4(a) and 5(c), the upper protruding portion 6c1 of the communication opening 6c connects to the upper central part in the left-right direction between the second region 60b22 and the left protruding portion 60b3 of the right protruding portion 60b2 of the rear wall 60b. The portion of the communication opening 6c below the protruding portion 6c1 connects to the central end in the left-right direction of the wall portion 60b1 of the rear wall 60b.

[0023] (4-4) Fixed cleaning section As shown in Figure 4, the fixed cleaning sections 71, 72, and 73 are provided on the bottom wall 600 of the suction device body 6. The fixed cleaning sections 71, 72, and 73 protrude downward from the bottom wall 600 and have ridges. As shown in Figure 2, the lower surfaces of the fixed cleaning sections 71, 72, and 73 substantially coincide with the lower end of the rotational trajectory of the outermost point of the cleaning body 42 of the rotating cleaning body 4. This makes it possible to reduce or eliminate the gap between the fixed cleaning sections 71, 72, and 73 and the cleaning surface (floor surface), thereby improving the airtightness between the cleaning section and the cleaning surface and the ease of cleaning the cleaning surface. The fixed cleaning units 71, 72, and 73 are fixed to the bottom wall 600, and differ from the rotating cleaning unit in that the rotating cleaning body 4 rotates to clean the cleaning surface.

[0024] As shown in Figure 5(b), the bottom wall 600 includes a right bottom wall portion 601 located to the right of the suction port 6a, a left bottom wall portion 602 located to the left of the suction port 6a, and a rear bottom wall portion 603 located behind the suction port 6a (see Figure 2). Note that the right bottom wall portion 601 also includes the area to the right of the suction port 6a and behind the suction port 6a, the left bottom wall portion 602 also includes the area to the left of the suction port 6a and behind the suction port 6a, and the rear bottom wall portion 603 does not include both the left and right sides of the suction port 6a. The right bottom wall 601 and the rear bottom wall 603 are formed by the lower case 61, and the left bottom wall 602 is formed by the cover body 69.

[0025] As shown in Figure 5(b), the fixed cleaning units 71 and 72 are first fixed cleaning units arranged to be aligned with the suction port 6a in the left-right direction, and will be described below as the first fixed cleaning units 71 and 72. The first fixed cleaning unit 71 is located on the right bottom wall 601. The first fixed cleaning unit 72 is located on the left bottom wall 602. The first fixed cleaning sections 71 and 72 extend from the front to the rear, approaching the suction port 6a. This allows dust captured by the first fixed cleaning sections 71 and 72 to be moved towards the suction port 6a by moving the suction tool 3 to the front. The inclination angle of the first fixed cleaning sections 71 and 72 with respect to the left-right direction is not particularly limited, but is preferably within the range of 15 to 75° with respect to the left-right direction. This allows the captured dust to be moved smoothly. The front ends 71a and 72a of the first fixed cleaning sections 71 and 72 are located at the front ends of the suction tool body 6, at both ends (right and left ends) or near them, when viewed from below. This makes it easier to capture dust on the left and right ends of the suction tool 3. In addition, by bringing the left or right end of the suction tool 3 into contact with or close to the wall, the gap between the first fixed cleaning sections 71 and 72 and the wall can be reduced, making it easier to capture dust near the wall. The rear ends 71b and 72b of the first fixed cleaning sections 71 and 72 are located behind the axis L1 of the rotating cleaning body 4 when viewed from below, and are situated at or near both ends (right and left ends) of the suction port 6a in the left-right direction. In other words, the first fixed cleaning sections 71 and 72 extend along the front-rear direction such that their rear ends 71b and 72b are located at or near the suction port 6a. This makes it easier for dust that has moved to the rear along the first fixed cleaning sections 71 and 72 to be sucked into the suction port 6a. The first fixed cleaning sections 71 and 72 extend to both ends or near both ends in the left-right direction of the right bottom wall 601 and the left bottom wall 602. This improves the airtightness between the right bottom wall 601 and the cleaning surface, and between the left bottom wall 602 and the cleaning surface. The first fixed cleaning sections 71 and 72 extend continuously from the front ends 71a and 72a to the rear ends 71b and 72b. This allows dust captured at the front of the first fixed cleaning sections 71 and 72 to move smoothly to the rear (if they are discontinuous, the dust can get caught or stuck in the discontinuous section, preventing it from moving smoothly). Furthermore, when the first fixed cleaning sections 71 and 72 are formed on both the left and right sides as shown in Figure 5(b), they are arranged in a V-shape that widens towards the front. Furthermore, a groove 76 is formed on the right bottom wall 601 behind the first fixed cleaning section 71, and a groove 77 is formed on the left bottom wall 602 behind the first fixed cleaning section 72.

[0026] The fixed cleaning units 71 and 72 are composed of rubber, brushes, felt, or combinations thereof. As shown in Figure 8, the fixed cleaning sections 71 and 72 integrally include a main body section 711 and 721 of a projection, a bent section 713 and 723 that bends upward from one end (tip) of the main body section 711 and 712, and an extended section 715 and 725 that extends from the upper end of the bent section 713 and 723 toward the other end of the main body section 711 and 721. The bent section 713 and 723 and the extended section 715 and 725 may also be folded over. One end is the front end of the fixed cleaning section 71 and 72. The fixed cleaning unit 71 is attached to the lower case 61 of the main body 60, and the fixed cleaning unit 72 is attached to the cover body 69 of the main body 60. The main body sections 711 and 721 are fixed in place by adhesive or adhesive tape, fitting into the grooves 601a and 602a of the bottom wall sections 601 and 602. The grooves 601a and 602a are formed on the inside of the protruding "U"-shaped parts that match the outer circumference of the main body sections 711 and 721 when viewed from below. As a result, even when the suction tool 3 is moved back and forth or left and right, the upper side (bottom wall side) of the fixed cleaning section 71 and 72 is supported by the sides of the grooves 601a and 602a, making it difficult for them to detach from the bottom wall sections 601 and 602. The extensions 715 and 725 are inserted into the through holes 60d and 60e of the main body 60 (lower case 61 or cover body 69). This makes it difficult for the front ends 71a and 72a of the fixed cleaning parts 71 and 72 to peel off from the bottom walls 601 and 602. The fixed cleaning sections 71 and 72 are attached to the main body 60 (lower case 61 or cover body 69) by inserting the extension sections 715 and 725 into the through holes 60d and 60e of the main body 60 (lower case 61 or cover body 69) and fixing the main body sections 711 and 721 so that they fit into the grooves 601a and 602a of the bottom wall sections 601 and 602. For fixing the main body parts 711 and 721, for example, adhesive or adhesive tape can be used. The bumpers 622 and 623 are fixed to the main body 60 (lower case 61 or cover body 69) in a manner that covers a portion of the fixed cleaning sections 71 and 72 (bent sections 713 and 723 in this embodiment). This makes it even more difficult for the front ends 71a and 72a of the fixed cleaning sections 71 and 72 to detach from the main body 60. Here, as shown in Figure 8, the bent sections 713 and 723 are located at the corners (boundaries between the front end and the left and right ends) that connect the front end and both left and right ends of the suction tool body 6, and the curved portions 622a and 623a of the bumpers 622 and 623 cover the bent sections 713 and 723. This makes the straight front portions 622b and 623b and the lateral portions 622c and 623c of the bumpers 622 and 623 longer, and increases the fixing force of the bumpers 622 and 623 to the suction tool body 6. The bumpers 622 and 623 are fixed to the main body 60 by fitting into grooves 60f and 60g, for example, with adhesive or adhesive tape. The groove 60g is composed of a recess in the cover body 69 and the lower case 61. Since a portion of the fixed cleaning parts 71 and 72 are covered by the bumpers 622 and 623, the fixed cleaning parts 71 and 72 may be configured without an extension part 715.

[0027] The fixed cleaning section 73 is a second fixed cleaning section that extends in the left-right direction or substantially in the left-right direction, and will be described below as the second fixed cleaning section 73. As shown in Figure 5(b), the second fixed cleaning unit 73 extends from the rear of the suction port 6a in the left-right direction. The second fixed cleaning unit 73 is located behind the first fixed cleaning units 71 and 72. The second fixed cleaning section 73 is formed in the rear bottom wall section 603 (see Figure 2) and the right bottom wall section 601. The right end portion 73a of the second fixed cleaning section 73 is located at or near the right end of the suction tool body 6. This makes it easier to capture dust on the right end side of the suction tool 3. In addition, by bringing the right end of the suction tool 3 into contact with or close to the wall, the gap between the second fixed cleaning section 73 and the wall can be reduced, making it easier to capture dust near the wall. The left end portion 73b of the second fixed cleaning section 73 is located at the left end of the suction port 6a in the left-right direction, or near the rear side. The second fixed cleaning section 73 extends continuously from the left end or near the suction port 6a to the right end of the suction tool body 6. This prevents dust from escaping from discontinuous sections that would occur if there were discontinuities in the left-right direction.

[0028] The fixed cleaning unit 73 is composed of rubber, brushes, felt, or a combination thereof. As shown in Figure 8, the fixed cleaning unit 73 is attached to the bottom wall portion 603 of the main body 60. The fixed cleaning unit 73 is fixed in place, for example, by adhesive or adhesive tape, by fitting into the groove portion 603a of the bottom wall portion 603. When viewed from below, the groove portion 603a is formed on the inside of a rectangular annular projection that matches the outer shape of the fixed cleaning unit 73. As a result, even when the suction tool 3 is moved back and forth or left and right, the upper side (bottom wall side) of the fixed cleaning unit 73 is supported by the side of the groove portion 603a, making it difficult for it to detach from the bottom wall portion 603.

[0029] (4-5) Groove As shown in Figure 4, the grooves 76 and 77 are provided to communicate with the suction port 6a. The grooves 76 and 77 extend in the left-right direction or in a direction intersecting the left-right direction. In this case, the grooves 76 and 77 extend in the left-right direction. The grooves 76 and 77 are located on both the left and right sides of the suction port 6a. In other words, when viewed from below, the grooves 76 and 77 are provided to connect to the left and right ends of the rectangular suction port 6a (see Figure 5(b)). As shown in Figure 5(b), grooves 76 and 77 are located on the rear side of the first fixed cleaning sections 71 and 72. Grooves 76 and 77 are located on the front side of the second fixed cleaning section 73. Here, groove 76 is located between the first fixed cleaning section 71 and the second fixed cleaning section 73 in the front-rear direction. Groove 77 is located between the engaging section 693 of the cover body 69 and the first fixed cleaning section 72. The groove 76 is located in front of the second fixed cleaning section 73 and extends parallel to the second fixed cleaning section 73. The groove 77 is located in front of the engaging section 693 of the cover body 69 and extends parallel to the second fixed cleaning section 73. This makes it easier for dust captured by the second fixed cleaning section 73 to be sucked into the suction port 6a through the grooves 76 and 77. As shown in Figure 5(b), the grooves 76 and 77 are aligned in the left-right direction with respect to the protruding portions 60b2 and 60b3 of the rear wall 60b of the rotating cleaning chamber 6b. In other words, the grooves 76 and 77 and the protruding portions 60b2 and 60b3 are located in a straight line in the left-right direction. As a result, air (dust) that enters the rotating cleaning chamber 6b from the grooves 76 and 77 is smoothly drawn along the lower wall of the protruding portions 60b2 and 60b3 to the communication port 6c. Here, in the front-rear direction, the rear side surfaces of grooves 76 and 77 are in approximately the same position as the wall portion 60b1 of the rear wall 60b, and the front side surfaces of grooves 76 and 779 are located in front of the side surfaces (front surfaces) of the protruding portions 60b2 and 60b3. Furthermore, the grooves 76 and 77 are formed so that their dimensions (width) are constant in the front-to-back direction.

[0030] (4-6) Projection body In Figure 5(b), the projections 6d are shown as being present on both sides of the axial center of the rotating cleaning body 4 in the axial direction, but they may be present on at least one side. Since one projection 6d and the other projection 6d have many structural similarities, we will mainly explain the features common to both the projection 6d (left side) and the projection 6d (right side).

[0031] As shown in Figures 4(b) and 5(b), the protruding body 6d projects downward or toward the rotating cleaning body 4 from the inner surface of the upper wall 60c (rotating cleaning body chamber 6b) in a rib-like manner. Specifically, as shown in Figure 5(b), the protruding body 6d extends such that, in the axial direction of the rotating cleaning body 4, the front end 6d1 is located further forward than the rear end 6d2 in the front-rear direction, and its extension direction intersects with the axial direction of the rotating cleaning body 4. The rear end is referred to as the rear end, and the front end as the front end. In other words, the protruding body 6d extends in an inclined manner so that it moves away from the front of the communication port 6c as it moves from one end (right or left end) towards the center in the axial direction of the rotating cleaning body 4. As a result, dust present around the rotating cleaning body 4 is captured on the rear side of the protruding body 6d (on the side of the rotating cleaning body 4 that is not rotating relative to the protruding body 6d) (see dust 95 in Figure 10(a)). Here, the dust present around the rotating cleaning body 4 includes dust stirred up by the rotation of the rotating cleaning body 4, dust adhering to the cleaning body 42, dust sucked into the suction port 6a through the grooves 76, 77 of the bottom wall 600, dust sucked into the suction port 6a along the first fixed cleaning parts 71, 72, dust captured by the second fixed cleaning part 73, etc.

[0032] In this embodiment, as shown in Figure 2, the upper wall 60c of the rotating cleaning chamber 6b is arc-shaped in accordance with the rotation of the rotating cleaning body 4, or because the rotating cleaning body 4 rotates, the lower end (projecting end) of the projection 6d is also arc-shaped. Note that the central end (front end 6d1) of the projection 6d in the left-right direction, that is, the lower end 6m of the front end on the front wall 60a side, extends in the front-back direction when viewed from the left-right direction. As shown in Figure 2, the protruding body 6d has a curved portion 6d5 that curves in the direction of rotation of the rotating cleaning body 4 and a straight portion 6d6 that extends in the front-rear direction. The curved portion 6d5 protrudes from the upper wall 60c, and the straight portion 6d6 protrudes from both the upper wall 60c and the rear wall 60b.

[0033] As shown in Figure 5(b), the protruding body 6d extends in the left-right direction from its end towards the center, and in the front-rear direction it moves away from the communication port 6c. In other words, as shown in Figure 5(b), when viewed from below (towards the suction port 6a), it is inclined with respect to the axis L1 of the rotating cleaning body 4, and the left-right end of the protruding body 6d (rear end 6d2) is located behind the center end (front end 6d1) in the left-right direction. This reduces the problem that occurred when the protruding body 6d was absent, where dust would continue to rotate in place at the axial end of the rotating cleaning body 4 due to the rotation of the rotating cleaning body 4 and would not move towards the communication port 6c (i.e., accumulate). When viewed from below, the projection 6d extends in a straight line. Here, "straight line" means that, when viewed from below, it does not have both a convexity of 1 or more and a concaveness of 1 or more. In other words, it does not have extrema; it does not have a local maximum where the slope of the tangent to projection 6d reverses from positive to negative, nor a local minimum where it reverses from negative to positive. This allows dust to move smoothly forward. As shown in Figure 5(b), when viewed from above (in this case, from below), the protruding body 6d intersects with the virtual plane H (see Figure 2) at an angle C. The virtual plane H is a virtual plane that passes through the axis of rotation (axis L1) of the rotating cleaning body 4 shown in Figure 2 and is parallel to the direction of gravity. The angle C is in the range of 15 to 45°, and in this case it is 30°.

[0034] As shown in Figure 5(b), one projection 6d extends continuously from the left-right end towards the center. This allows for smooth movement of dust. In other words, if there is a gap (discontinuity) in the extension direction of the projection 6d, dust will get caught there, preventing it from moving smoothly. Note that gaps that do not hinder dust movement are conceptually included in the concept of continuity. One projection 6d has, in the left-right direction, a first portion 6d3 located on the central side of the communication opening 6c (a virtual line L3 passing through the left-right ends of the communication opening 6c and extending in the front-rear direction) when viewed from below, and a second portion 6d4 located on the end side of the communication opening 6c. Here, the second portion 6d4 is longer than the first portion 6d3.

[0035] As shown in Figure 5(b), the front end 6d1 of the protruding body 6d in the extension direction is located on the left-right side of the center of the rotating cleaning chamber 6b in the left-right direction relative to the imaginary line L3, and is closer to the imaginary line L3 relative to the center line C1 in the front-rear direction that passes through the center of the communication opening 6c. Furthermore, the front end 6d1 of the protruding body 6d may be located on the side of the rotating cleaning chamber 6b relative to the imaginary line L3 in the left-right direction, and closer to the imaginary line L3 relative to the end of the rotating cleaning chamber 6b. This makes it easier for dust guided to the center in the left-right direction along the protruding body 6d to be sucked into the communication port 6c. In other words, the front end 6d1 of the projection 6d is located near a virtual line L3 that passes along the edge of the communication opening 6c and extends in the front-to-back direction in the left-to-right direction. Here, "near" means that the distance from the virtual line L3 is within 30% of the left-to-right dimension of the communication opening 6c. In Figure 5(b), the virtual line L3 is approximately 10% away from the inside of the communication opening 6c (towards the center line C1). As shown in Figure 4(b), the central end (front end 6d1) of the protruding body 6d tapers towards the central end. This makes it easier for dust that has moved along the protruding body 6d to detach from it.

[0036] On the other hand, the rear end 6d2 of the protruding body 6d in the extension direction is located closer to the edge of the rotating cleaning chamber 6b in the left-right direction compared to the center line C1, as shown in Figure 5(b). The left-right end (rear end 6d2) of the protruding body 6d may be located inward in the left-right direction relative to the left-right end (the end on which the protruding body 6d is located) of the cleaning body 42 of the rotating cleaning body 4, or it may be located outward in the left-right direction, or it may be located so as to coincide with it. Note that if the end is located outward from the cleaning body 42, it is easier to capture dust present on the end of the cleaning body 42.

[0037] Here, we will explain the case where there are protrusions 6d on both sides of the center of the rotating cleaning body 4 in the left-right direction. The structure of each of the left and right protrusions 6d individually is as described above, but as shown in Figure 5(b), when viewed from the cleaning surface side, the protrusions 6d are located outward from the communication opening 6c in the left-right direction. To put it simply, they are inclined in a "V" shape. In this configuration, as the rotating cleaning body 4 rotates, the cleaning body 42 comes into contact with the projection body 6d. As a result, dust present around the rotating cleaning body 4 is captured by the projection body 6d. The dust captured by the projection body 6d is pushed by the rotational movement of the cleaning body 42 and moved toward the front end 6d1 of the projection body 6d. Since the contact of the cleaning body 42 with the projection body 6d is repeated by the rotation of the rotating cleaning body 4, the dust captured by the projection body 6d is more likely to move toward the front end 6d1 of the projection body 6d. This occurs for both projection bodies 6d, thus preventing dust from accumulating at both ends in the axial direction of the rotating cleaning body 4. Furthermore, the pair of protrusions 6d on the left and right are positioned so that there is a gap between them towards the center in the left-right direction. This causes the space between the pair of protrusions 6d to face the communication port 6c, which suppresses a decrease in suction force and allows dust that has moved along the protrusions 6d to be sucked up. 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 L1 when viewed from the cleaning surface side (see Figure 5(b)) is smaller than the helical angle of the cleaning body 42 (angle B shown in Figure 5(a)).

[0038] (4-7) Composition As shown in Figure 1, the suction device body 6 comprises a main body 60, a fitting 65, and a connecting pipe 67. (4-7-1) Main body The main body 60, which consists of a lower case 61, an upper case 62, and a cover body 69, has, when viewed from the cleaning surface side, a "T" shape with a lateral extension portion 611 extending in the left-right direction and a longitudinal extension portion 612 extending in the front-back direction, as shown in Figure 4(b). A suction port 6a and a rotating cleaning chamber 6b are provided in the lateral extension section 611, and a joint 65 is attached to the vertical extension section 612. As shown in Figure 3, the drive chamber 6e is provided spanning the rear portion of the rotating cleaning chamber 6b, which is on the other side (right side) of the longitudinal extension 612 in the lateral extension 611, and the other end (right end) in the left-right direction of the lateral extension 611, which is on the outside (right side) of the rotating cleaning chamber 6b. A drive output means 51 is located on the rear side of the rotating cleaning chamber 6b, and a driven mechanism 52 and a one-end support part 55 are located on the right side of the rotating cleaning chamber 6b. As shown in Figure 4(b), the support chamber 6f is located to the left of the rotating cleaning chamber 6b in the lateral extension 611 and consists of a lower case 61 and a cover body 69. As shown in Figure 7, the cover body 69 has a bottom wall portion 602 that forms part of the bottom wall 600 of the main body 60, and a protrusion 691, a fixing cleaning portion 72, and a left bumper 623 are provided on the bottom wall portion 602. The cover body 69 has engaging portions 692 and 693 that engage with the engaging portions 6q and 6r of the lower case 61, and is detachable from the lower case 61. The engaging portion 6q is composed of an "L"-shaped recess formed while leaving a portion where the bottom wall and front wall of the lower case 61 connect. The engaging portion 692 is composed of an "L"-shaped projection. The "L"-shaped projection is inserted into the "L"-shaped recess and engages with a portion of the connecting portion between the bottom wall and the front wall. The engaging portion 6r is formed by a through hole formed in the bottom wall of the lower case 61. The engaging portion 693 has a first extended portion extending upward from the bottom wall portion 602 and a second extended portion extending downward from the upper end of the first extended portion, with the second extended portion being able to move toward and away from the first extended portion. The hole in the engaging portion 6r and the second extended portion of the engaging portion 693 are configured such that passage of the engaging portion 693 is permitted when the first extended portion of the engaging portion 693 is elastically deformed to approach the second extended portion.

[0039] (4-7-2) Fittings As shown in Figure 3, the joint 65 has its front end 651 sandwiched between the lower case 61 and the upper case 63. The main body 652 of the joint 65 is rotatably mounted to the front end 651 with the front-to-back direction as the axis of rotation.

[0040] (5) Connecting pipe As shown in Figure 3, the connecting pipe 67 is attached to the joint 65 so as to be rotatable with respect to a rotation axis perpendicular to the rotation axis that extends in the front-rear direction of the joint 65, by having its lower end 671 inserted into the recess 653 of the joint 65.

[0041] 3. Movement of dust (1) Dust on the left and right sides relative to the intake The movement of dust on the side of the suction device 3 will be explained using Figure 9. Figures (a), (c), (e), and (g) show the left-side first fixed cleaning unit 72 viewed from below, while figures (b), (d), and (f) show the right-side first fixed cleaning unit 71 viewed from below. Figures (a), (b), (c), and (d) are intended to illustrate the state where either the left or right side of the suction device 3 is in contact with the wall, and do not represent the state where both ends of the suction device 3 are in contact with the wall simultaneously.

[0042] (1-1) Dust 91 on the front side of the suction device 3, near the wall As shown in Figures (a) and (b), dust 91 near the wall is captured by the front ends 71a and 72a of the first fixed cleaning units 71 and 72, and moves along the first fixed cleaning units 71 and 72 to the rear side of the first fixed cleaning units 71 and 72. At this time, since the suction port 6a is located on the inside in the left-right direction relative to the first fixed cleaning units 71 and 72, the dust 91 tends to move towards the inside in the left-right direction of the first fixed cleaning units 71 and 72 (the side closer to the suction port 6a). Subsequently, the dust 91 that has moved to the rear along the inner end faces 71c, 72c of the first fixed cleaning sections 71, 72 is sucked into the suction port 6a. At this time, the first fixed cleaning sections 71, 72 extend so that they move closer to the suction port 6a as they move from the front to the rear. As a result, the suction force increases as the dust 91 moves closer to the suction port 6a as it moves to the rear, making it easier for the dust 91 to be sucked into the suction port 6a at the rear end ends 71b, 72b of the first fixed cleaning sections 71, 72. This makes it possible to suck up dust 91 along the wall.

[0043] (1-2) Dust between the wall and the first fixed cleaning section 71, 72 The dust 92 on the wall side, that is, the dust 92 that was not captured by the first fixed cleaning units 71 and 72, moves to the rear side through the space between the wall and the first fixed cleaning units 71 and 72, as shown in Figures (c) and (d). In this case, the first fixed cleaning sections 71 and 72 have protruding ridges that extend downward, improving the airtightness of the space enclosed by the wall, the first fixed cleaning sections 71 and 72, and the bottom wall sections 601 and 602. In addition, there are gaps 78 and / or grooves 76 and 77 behind the first fixed cleaning sections 71 and 72 that communicate with the suction port 6a. In other words, the grooves 76 and 77 form a passage that communicates with the suction port 6a. As a result, dust 92 moving between the wall and the first fixed cleaning sections 71 and 72 is sucked into the suction port 6a through the gaps 78 and grooves 76 and 77 (communication passages). This makes it possible to suck up dust 91 along the wall. Some or all of the dust 92 that is sucked into the suction port 6a through the gap 78 and grooves 76, 77 is sucked to the communication port 6c along the bottom wall of the protruding portions 60b2, 60b3 of the rear wall 60b of the rotating cleaning chamber 6b.

[0044] (1-3) Dust on the left and right sides of the suction device As shown in Figures (e) and (f), the dust 93 present on the left and right sides of the suction device 3 is more easily sucked into the suction port 6a through the gaps 78 and grooves 76 and 77 because the first fixed cleaning parts 71 and 72 protrude downward, improving the airtightness of the space enclosed by the wall, the first fixed cleaning parts 71 and 72, and the bottom wall parts 601 and 602. Some or all of the dust 93 that is sucked into the suction port 6a through the gap 78 and grooves 76, 77 is sucked to the communication port 6c along the bottom wall of the protruding portions 60b2, 60b3 of the rear wall 60b of the rotating cleaning chamber 6b.

[0045] (1-4) Dust captured in the second fixed cleaning unit As shown in Figure (g), the dust 94 captured by the second fixed cleaning unit 73 is sucked into the suction port 6a through the groove 76 provided on the front side of the second fixed cleaning unit 73. Some or all of the dust 94 that is sucked into the suction port 6a through the groove 76 is then sucked to the communication port 6c along the bottom wall of the protruding portion 60b2 of the rear wall 60b of the rotating cleaning chamber 6b.

[0046] (2) Dust sucked in from the intake The movement of dust particles will be explained using Figure 10. Figure 10 is a view from above showing the state after the front wall 60a and upper wall 60c have been removed, leaving the protruding body 6d in place. Figure (a) illustrates the case where dust 95 is located at the left end (left side) in the rotating cleaning chamber 6b. In the absence of the protruding body 6d, the dust 95 in this vicinity tends to rotate in the direction of arrow L4 along the rotation direction of the rotating cleaning body 4 and remain there without moving towards the center in the left-right direction. This is thought to be because the suction force at both ends in the left-right direction is weaker than the suction force towards the center in the left-right direction (the suction force that moves the dust towards the center). The suction device 3 of this embodiment has at least one of the left and right protruding bodies 6d, and the left protruding body 6d will be described as an example. As the rotating cleaning body 4 rotates, the cleaning body 42 comes into contact with the protruding body 6d. At this time, the protruding body 6d is inclined so that, when viewed from above, it moves towards the front in the front-rear direction as it moves from the left-right ends toward the center. In other words, a row of cleaning bodies 42 is configured to come into contact with the protruding body 6d from the rear side at the left-right ends. As a result, dust 95 present around the rotating cleaning body 4 at the left-right ends is captured at the rear side of the protruding body 6d (see Figure 10(a)). As the rotating cleaning body 4 rotates, the row of cleaning bodies 42 changes the position in which it contacts the protruding body 6d toward the front end 6d1 side of the protruding body 6d. As a result, the dust 95 captured by the protruding body 6d is pushed along the protruding body 6d toward the front end 6d1 by the pressure of the cleaning body 42, so that the dust 95 moves toward the center in the left-right direction along the protruding body 6d, as shown in Figure (b). Furthermore, as the rotating cleaning body 4 rotates, the dust 95 moves along the protruding body 6d towards the center in the left-right direction, as shown in Figure (c). At the center in the left-right direction, it faces the communication port 6c, so the suction force is stronger than at the ends, and the dust 95 is sucked into the communication port 6c. In this description, we have explained the movement of a single row of cleaning bodies 42 and dust 95. However, if the rotating cleaning body 4 has multiple rows of cleaning bodies 42, the frequency of contact between the cleaning bodies 42 and the protruding body 6d increases, thereby improving the effect of moving the dust 95 towards the center in the left-right direction along the protruding body 6d.

[0047] <Second Embodiment> In the first embodiment, the second fixed cleaning section 73 extended to one end (the right end) in the left-right direction, but it may also extend to both ends in the left-right direction, and the case where it extends to both ends in the left-right direction will be described as the second embodiment. In addition, for configurations that are the same as or substantially the same as those described in the first embodiment, the reference numerals described in the first embodiment will be used, and their explanations will be omitted. Furthermore, in the second embodiment, configurations that differ from the first embodiment will be mainly described, and the reference numerals for these different configurations will be the same as the reference numerals in the first embodiment plus "1000", for example, suction device 1003. As shown in Figure 11(a), the suction device 1003 of the second embodiment has a suction device body 1006 and a rotating cleaning body 4. The suction device body 1006 has a suction port 6a, a rotating cleaning chamber 1006b, a communication port 1006c, a drive chamber 6e, a support chamber 6f, and the like. The rotating cleaning body 4 is rotatably housed in the rotating cleaning body chamber 1006b, and the rotating cleaning body 4 can be removed from the suction tool body 1006 by removing the cover body 1069, which constitutes the support chamber 6f, from the lower case 61. The bottom wall 1600 of the suction device body 1006 is provided with a first fixed cleaning section 71, 72, a second fixed cleaning section 73, and a third fixed cleaning section 1073. A groove 76 is provided between the first fixed cleaning section 71 and the second fixed cleaning section 73, and a groove 77 is provided between the first fixed cleaning section 72 and the third fixed cleaning section 1073.

[0048] The third fixed cleaning section 1073 is formed in the left bottom wall section 602, which is the bottom wall of the cover body 1069. The left end portion 1073a of the third fixed cleaning section 1073 is located at or near the left end of the suction tool body 1006 (cover body 1069). This makes it easier to capture dust on the left end side of the suction tool 1003. In addition, by bringing the left end of the suction tool 1003 into contact with or close to the wall, the gap between the third fixed cleaning section 1073 and the wall can be reduced, making it easier to capture dust near the wall. The right end portion 1073b of the third fixed cleaning section 1073 is located at the left end of the suction port 6a in the left-right direction, or near the rear side. The right end 1073b of the third fixed cleaning section 1073 is adjacent to the left end 73b of the second fixed cleaning section 73 in the left-right direction. In other words, it is located at the right end of the cover body 1069. That is, the third fixed cleaning section 1073 extends continuously from the left end or near the suction port 6a to the left end of the suction tool body 1006 (extending continuously from the right end to the left end of the cover body 1069). This reduces the gap between the third fixed cleaning section 1073 and the second fixed cleaning section 73, and reduces the amount of dust escaping from the parts that are not continuous in the left-right direction. Furthermore, the third fixed cleaning section 1073 and the second fixed cleaning section 73 are located close to each other in the left-right direction, extend linearly in the left-right direction, and extend as approximately a single protrusion. This improves the airtightness between the suction tool 1003 and the cleaning surface. The third fixed cleaning unit 1073 is located behind the groove 77 in the front-rear direction. This makes it easier for dust captured by the third fixed cleaning unit 1073 to be sucked from the groove 77 into the suction port 6a. The third fixed cleaning section 1073 is fixed to the bottom wall 602 of the cover body 1069 by fitting into a groove, for example, with adhesive or adhesive tape. The groove is formed on the inside of a rectangular, annular projection that matches the outer shape of the fixed cleaning section 1073 when viewed from below. As a result, even when the suction tool 1003 is moved back and forth or left and right, the upper side (bottom wall side) of the third fixed cleaning section 1073 is supported by the side of the groove, making it difficult for it to detach from the bottom wall 603.

[0049] The rotating cleaning chamber 1006b is composed of a front wall 1060a, a rear wall 1060b, and an upper wall 60c. A bumper (front bumper) 1621 extending in the left-right direction is provided at the lower end of the front wall 1060a. The rear wall 1060b has a wall portion 1060b1 that is substantially perpendicular to the front-rear direction, and a communication opening 1006c is provided in this wall portion 1060b1. The wall portion 1060b1 is flat (single-plane) and does not have the protruding portions 60b2 and 60b3 of the rear wall 60b in the first embodiment. Therefore, the communication opening 1006c is formed on a flat surface and does not have the protruding portion 6C1 of the first embodiment. Note that the front-rear dimensions of the rotating cleaning chamber 1006b in the second embodiment are smaller than those of the rotating cleaning chamber 6b in the first embodiment.

[0050] The suction device body 1006 has a protruding body 6d in the rotating cleaning chamber 1006b. In Figure 11(b), the protruding body 6d is present on both sides of the axial center of the rotating cleaning body 4 in the axial direction, but it may be present on at least one side. The front end 6d1 of the protruding body 6d in the extension direction is located on the left-right side of the center of the rotating cleaning chamber 1006b in the left-right direction relative to the imaginary line L3, and is closer to the imaginary line L3 than the center line C1 in the front-rear direction that passes through the center of the communication opening 1006c. The front end 6d1 of the protruding body 6d may be located on the side of the rotating cleaning chamber 1006b relative to the imaginary line L3 in the left-right direction, and also closer to the imaginary line L3 relative to the end of the rotating cleaning chamber 1006b. This makes it easier for dust guided to the center in the left-right direction along the protruding body 6d to be sucked into the communication port 6c.

[0051] <Third Embodiment> In the first and second embodiments, the projection 6d had at least one projection 6d on the left or right side with respect to the center line C1. However, there may be multiple protrusions extending from the left and right (axial) ends to the center, and the case where there are multiple protrusions will be described as a third embodiment. The third embodiment differs from the suction device 1003 described in the second embodiment in the number of protruding parts, while other configurations are the same or substantially the same. The different configurations will be described, and the reference numerals for the different configurations will be the same as the reference numerals in the second embodiment plus "1000", for example, suction device 2003. The following explanation will primarily focus on the protruding body 2006d, using Figure 12 as a reference. Figure 12 shows the structure with the upper wall and other components removed, while the protruding body 2006d remains, viewed from above.

[0052] The suction device 2003 of the third embodiment is equipped with a rotating cleaning body 4 on the suction device body 2006, and has a protruding body 2006d in the rotating cleaning body chamber 2006b of the suction device body 2006. The protruding body 2006d protrudes from the inner wall (e.g., the upper wall 60c) of the rotating cleaning chamber 2006b so as to contact the cleaning body 42 of the rotating cleaning body 4. The protruding bodies 2006d are located, for example, on both sides of the center in the left-right direction of the rotating cleaning chamber 2006b, with multiple protruding bodies 2006d (for example, three) arranged on one side relative to the center. Each protruding body 2006d extends with an inclination that moves away from the communication opening 1006c in the front-rear direction (moving forward in the front-rear direction) as it moves from the axial end of the rotating cleaning body 4 towards the center. The multiple protrusions 2006d on one side are arranged to gradually approach the communication opening 1006c. More specifically, the protrusions 2006d on the central side are arranged to be closer to the communication opening 1006c than the protrusions 2006d on the end side.

[0053] The multiple protrusions 2006d on one side are arranged so that they approach the communication opening 1006c as they move from the left-right ends towards the center. In other words, the multiple protrusions 2006d on one side are arranged so that they move towards the rear side (closer to the communication opening 1006c) in the front-rear direction as they move from the left-right ends towards the center. Furthermore, the imaginary line L5 passing through the center of the extension direction of each of the multiple protrusions 2006d on one side (or the two protrusions 2006d located at both ends in the left-right direction) is inclined so that it approaches the communication opening 1006c in the front-rear direction (downward towards the rear) as it moves from the left-right ends towards the center. As a result, compared to the case where the multiple protrusions 2006d are arranged parallel to the left-right direction (when the imaginary line L5 is parallel to the axis L1), the distance between two protrusions 2006d that are arranged and spaced apart in the left-right direction is larger, and large dust particles 2095A can pass between these protrusions 2006d (see arrow L6 in Figure 12). In other words, it is possible to prevent large dust particles 2095A from getting stuck between the protruding parts 2006d. The imaginary line L5 intersects the axis L1 when viewed from above or below. The intersection angle is 45 degrees or less, for example, 30 degrees. In other words, the imaginary line L5 intersects the imaginary plane H which passes through the rotation axis (axis L1) of the rotating cleaning body 4 and is parallel to the direction of gravity. Furthermore, as indicated by the arrow L7 on the right side (left side in Figure 12) of the suction device 2003 in the left-right direction in Figure 12, the central projection 2006d is set back relative to the end projection 2006d. Therefore, dust particles 2095B that have moved from the ends to the center along each projection 2006d can easily move directly towards the communication port 1006c, avoiding getting caught on the central projection 2006d even after moving away from the end projection 2006d. In addition, because the central projection 2006d is set back relative to the end projection 2006d in the left-right direction, a decrease in suction power from the communication port 1006c can be prevented, allowing for the suction of a large amount of dust.

[0054] Multiple protrusions 2006d on one side are arranged to be aligned in the left-right direction. As shown in Figure 12, in two adjacent protrusions 2006d of the suction device 2003 in the left-right direction, 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 lie on a virtual line in the front-rear direction. Specifically, the inner end in the left-right direction of the outer projection 2006d1 and the outer end in the left-right direction of the projection 2006d2 located inside it are located on a virtual line T1 in the front-rear direction, and the inner end in the left-right direction of the outer projection 2006d2 and the outer end in the left-right direction of the projection 2006d3 located inside it are located on a virtual line T2 in the front-rear direction. Note that, in this example, the ends of two adjacent projections 2006d coincide exactly on the imaginary line, but they may also overlap in the left-right direction.

[0055] Multiple protrusions 2006d on one side are arranged continuously in the front-rear direction. Continuous here means that, as shown in Figure 12, for two adjacent protrusions 2006d in the front-rear direction of the suction device 2003, the rear end of the front protrusion 2006d and the front end of the rear protrusion 2006d are located on a virtual line in the left-right direction, and there is no gap in the front-rear direction. Specifically, the rear end of the projection 2006d1 located at the front and the front end of the projection 2006d2 located behind it are located on the imaginary line Y1 in the left-right direction, while the rear end of the projection 2006d2 located at the front and the front end of the projection 2006d3 located behind it are located on the imaginary line Y2 in the left-right direction. Note that, in this example, the ends of two adjacent projections 2006d coincide exactly on the imaginary line, but they may also overlap in the front-to-back direction.

[0056] Of the multiple protrusions 2006d on one side, the protrusion 2006d3 located furthest towards the center in the left-right direction is located on the side of the communication opening 1006c in the left-right direction, as shown in Figure 12.

[0057] <<Variation>> Although the first to third embodiments have been described above, the present invention is not limited to these embodiments. The following modifications may also be included in the present invention. 1. Electric vacuum cleaner The vacuum cleaner X in this embodiment is a stick type, but it may also be a handheld vacuum cleaner equipped with a vacuum cleaner body and a suction attachment, or a canister type vacuum cleaner equipped with a vacuum cleaner body having wheels, a hose, an extension tube, and a suction attachment. Additionally, the vacuum cleaner may be a wet-type model capable of sucking up both air and liquid.

[0058] 2. Suction device (1) The cleaning body 42 of the rotating cleaning body 4 is inclined to move to one side or the other side 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 L1, or it 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 side in the circumferential direction as it moves from both ends in the axial direction towards the center. Although multiple (four) cleaning units 42 were provided, there may be one or more than four. (2) The rotating cleaning body 4 was rotated by the drive unit 50, but it may also be rotated by friction with the cleaning surface by moving the suction tools 3, 1003, 2003 back and forth. In other words, the protruding bodies 6d, 2006d only need to be in contact with the cleaning body 42 of the rotating cleaning body 4, and the method of driving the rotating cleaning body 4 is not particularly limited. (3) The suction port 6a was provided on the bottom so as to span the front part and the lower part of the front of the bottom surface, but it may also be provided on the bottom surface (front, middle, rear, front side, middle side, rear side). (4) The protruding bodies 6d and 2006d are rib-shaped, but they may also be stepped in shape, extending downward or toward the rotating cleaning body in the direction of rotation of the rotating cleaning body 4. In other words, the upper wall 60c (inner wall) may extend downward, and the lower end of the protruding body may be in the shape of an arc along the direction of rotation. The central edge of the protruding body 6d in the left-right direction was tapered, but it may also be stepped (right-angled) or have an arc shape that protrudes backward. (5) When viewed from above, the protruding bodies 6d, 2006d were inclined to move linearly away from the communication openings 6c, 1006c from the left-right ends towards the center, but they may also be inclined to move curved away, or they may have one or more sets of linearly extending portions and curvedly extending portions. (6) As shown in Figure 5(b) or Figure 11(b), the protruding bodies 6d and 2006d extend in a straight line when viewed from the side perpendicular to the cleaning surface, but may have a series of straight lines or curves without extrema with different inclines, or may have a series of straight lines with different inclines and curves without extrema in combination. (7) The multiple projections 2006d had similar shapes as shown in Figure 12, but their inclination angles may be different, one projection 2006d may be straight and the other projections 2006d may be curved, or vice versa. (8) The protruding body 6d had a curved portion 6d5 and a straight portion 6d6 (see Figure 2), but it does not have to have a curved portion 6d5 or a straight portion 6d6. (9) When multiple projections are arranged in a line from one end in the left-right direction (axial direction) toward the center, two adjacent projections 2006d in the left-right direction are arranged so that their ends in the front-back direction and the left-right direction coincide or partially overlap, but they may also overlap in the front-back direction, as shown in projection 3006d in Figure 13(a). When multiple protrusions 2006d and 3006d are arranged in a row, the amount of protrusion of each protrusion may or may not change as it moves outward in the left-right direction. If it does change, the amount of protrusion may increase, decrease, or alternate as it moves outward. (10) The multiple projections 2006d on one side are provided continuously in the axial direction and the front-rear direction, but at least one of the axial direction and the front-rear direction may be discontinuous. (11) The projection 6d extends so as to intersect a virtual plane H that passes through the axis of rotation (axis line L1) of the rotating cleaning body 4 and is parallel to the direction of gravity. However, the projection 4006d may be located behind (see Figure 13(b)) or in front of the virtual plane H so as not to intersect the virtual plane H. (12) Although one protruding body 6d, 4006d was provided in the rotational direction of the rotating cleaning body 4, multiple protruding bodies may be provided. Preferably, they are spaced apart within a range of 20 to 50° in the rotational direction. Also, if multiple protruding bodies are provided in the rotational direction, the amount of protrusion may change as the body moves in the rotational direction, or it may not change. If it changes, the amount of protrusion may increase as the body moves in the rotational direction, decrease, or alternate between large and small. (13) The amount of protrusion of the protrusions 6d, 2006d, 3006d, and 4006d was constant, but for example, the amount of protrusion may be increased or decreased as the axial direction moves from the end to the center, or it may be repeatedly increased and decreased. Furthermore, if the amount of protrusion of the cleaning body 42 of the rotating cleaning body 4 changes, the amount of protrusion of the protruding body may be changed in accordance with that change. (14) Although the communication port 6c is provided in the joint 65, for example, the opening 6k in the rear wall 6h of the main body 60 of the suction device body 6 may be used as the communication port 6c. (15) The protruding body may be positioned to move around the axis (axis) in the direction of rotation or counter-rotation of the rotating cleaning body 4, compared to the protruding body 6d of the first embodiment.

[0059] (16) The cover body may be attached to the main body using an engagement structure other than the engagement portions 6q, 6r, and 692 of the cover body 69 in the first embodiment. It may also be attached using screws. In the modified engagement structure, as shown in Figure 14, the main body 5068 has engaging portions 5006q and 5006r, and the cover body 5069 has engaging portions 5692 and 5693. Note that the main body 5068 in this example is obtained by removing the cover body 5069 from the main body 5060. The engaging portion 5692 of the cover body 5069 engages with the engaging portion 5006q of the main body 5068, and the engaging portion 5693 engages with the engaging portion 5006r of the main body 5068. The engagement structure (concave-concave relationship) of the engagement portions 5006q and 5692 is the reverse of the engagement structure (concave-concave relationship) of the engagement portions 6q and 692 in the first embodiment. That is, the engagement portion 5006q protrudes in an "L" shape, and the engagement portion 5692 is composed of a through hole formed in the plate-like portion that extends upward. The engaging portion 5006r protrudes downward in an "L" shape from the bottom wall portion 5601 of the main body portion 5068. The engaging portion 5693 is composed of an "L" shaped protrusion formed on a movable piece 5070 that is provided to move between a first position and a second position relative to the main body portion 5691 of the cover body 5069. When the movable piece 5070 is in the first position, it does not engage with the engaging portion 5006r, and when the movable piece 5070 is in the second position, the "L" shaped protrusion of the engaging portion 5006r engages with the "L" shaped protrusion of the engaging portion 5693. The outer surface of the movable piece 5070 is a contact portion that is touched during operation. The movable piece 5070 may be biased by a biasing means in the direction from the first position toward the second position.

[0060] (17) The first fixed cleaning section 72, the groove section 77, and the third fixed cleaning section 1073 were provided on the bottom wall section 602 of the cover body 69, 1069. However, for example, if the bottom wall section of the main body is located on the outside in the left-right direction relative to the cover body, the first fixed cleaning section and the second fixed cleaning section may be provided on the bottom wall section of the main body, or the first fixed cleaning section, the groove section, and the second fixed cleaning section may be provided so as to span (continue) the bottom wall section of the main body and the bottom wall section of the cover body.

[0061] (18) The first fixed cleaning sections 71 and 72 have bent sections 713 and 723 located at the front ends of the left and right ends of the suction tool body 6, but the bent sections may be located at other parts. For example, the bent portions 713 and 723 may be located at the front end of the suction device body 6. In this case, the bent portions 713 and 723 are covered by the front portions 622b and 623b of the bumpers 622 and 623. The bumpers 622 and 623 have at least the front portions 622b and 623b, and may have at least one of the curved portions 622a and 623a and the lateral portions 622c and 623c, or they may not have any, but considering collisions with walls during cleaning, it is preferable to have at least the lateral portions 622c and 623c, either as an integral part or as separate. Furthermore, the bent portions 713 and 723 may be located at both ends of the suction device body 6. In this case, the bent portions 713 and 723 are covered by the lateral portions 622c and 623c of the bumpers 622 and 623. The bumpers 622 and 623 have at least the lateral portions 622c and 623c, and may have at least one of the curved portions 622a and 623a and the front portions 622b and 623b, or they may not have them. However, considering collisions with walls during cleaning, it is preferable to have at least the front portions 622b and 623b, either as an integral part or as a separate part. Furthermore, even if there are multiple first fixed cleaning sections 71 and 72, as shown in Figure 15, it is preferable that each bent section 713 and 723 be covered by the bumpers 622 and 623. Although bumpers 622 and 623 were provided to cover a portion of the fixed cleaning sections 71 and 72, the configuration is not limited to the bumpers 622 and 623 pressing the fixed cleaning sections 71 and 72 against the front wall of the suction tool body 6. The fixed cleaning sections 71 and 72 may be provided to extend in the left-right direction, and the bumpers 622 and 623 may press them against the side walls located on the left and right sides of the suction tool body 6. Alternatively, the fixed cleaning sections may be provided to extend in the front-rear direction or diagonally, and the bumpers 622 and 623 may press them against the rear wall of the suction tool body 6.

[0062] (19) The first fixed cleaning units (fixed cleaning units) 71, 72 were provided one on each side in the axial direction with respect to the rotating cleaning chambers 6b, 1006b or the suction port 6a, but as shown in Figure 15, multiple units, for example, two or three units, may be provided. In Figure 15, the first fixed cleaning unit on the right side is shown, but the first fixed cleaning unit on the left side may be the same as the one on the right side or may be different. The first fixed cleaning units 6071A, 6071B, and 6071C extend from the front to the rear, approaching the suction port 6a. In other words, when viewed from below, they are inclined to widen outwards towards the front. The lengths in the left-right direction (axial direction) may be the same, as in the first fixed cleaning units 6071A and 6071C, or they may be different in the left-right direction, as in the first fixed cleaning unit 6071B. If the lengths are different, it is preferable to position the longer one towards the rear from the viewpoint of dust removal. When multiple first fixed cleaning units are viewed from the front and rear directions, their positions may be such that they completely overlap, as in the case of first fixed cleaning unit 6071A, or they may partially overlap, as in the case of first fixed cleaning unit 6071C. Multiple first fixed cleaning units 6071C may be arranged such that they approach the suction port 6a as they move towards the rear in the front-to-back direction. In other words, multiple first fixed cleaning units 6071C may be arranged such that a virtual line L8 connecting the centers of the multiple first fixed cleaning units 6071C in the longitudinal direction extends towards the suction port 6a as it moves from the front to the rear. If there are multiple first fixed cleaning units (6071A, 6071B) in the front-to-back direction, the height of the multiple first fixed cleaning units from the bottom wall may be the same, or it may become higher (closer to the cleaning surface) as you move towards the rear. If there are multiple first fixed cleaning units 6071A in the front-to-back direction, there may be grooves 76A between the front and rear first fixed cleaning units 6071A that communicate with the suction port 6a and extend toward the left-to-right ends, or there may not be grooves, as is the case between the first fixed cleaning units 6071B. However, having grooves is preferable from the viewpoint of dust removal.

[0063] The first fixed cleaning units (fixed cleaning units) 71, 72, 6071A, 6071B, and 6071C had a constant width (dimension in the front-to-back direction) along their extension direction, but this can change. For example, the width may decrease or increase as it approaches the suction port 6a along the extension direction. The first fixed cleaning section (fixed cleaning section) 71, 72, 6071A, 6071B, 6071C may extend in a straight line (the center line of the cleaning section is straight), may extend in an arc shape, may extend in a stepped shape, or may extend in a shape that combines a straight line, a curved shape, and a stepped shape.

[0064] (20) The grooves 76 and 77 are provided to extend from the suction port 6a in a direction parallel to the left-right direction, but they may also extend from the suction port 6a in a direction that approaches the front end as it approaches the left-right end (so that when viewed from below, it slopes upward towards the front), or in a direction that approaches the rear end as it approaches the left-right end (so that when viewed from below, it slopes upward towards the rear). While grooves 76 and 77 were initially provided one per bottom wall 601 and 602 on the left and right sides, as shown in Figure 15(a), multiple grooves, for example two, may be provided. Note that Figure 15 shows the right bottom wall 601, but the grooves on the left bottom wall 602 may be the same or different. The groove 76A is provided between adjacent first fixed cleaning sections 6071A in the front-rear direction. The groove 76A may extend parallel to the two 6071A, or it may extend in a non-parallel manner. If the distance between the first fixed cleaning sections 6071A is large, the groove 76A may extend parallel to the axis, or it may extend in a stepped manner in which the direction of extension changes. The depth of the groove 76A may be constant along the extension direction of the groove, or it may vary. If it varies, it is preferable that it becomes deeper as it approaches the suction port 6a, considering the smooth movement of dust towards the suction port 6a. If it becomes deeper, the bottom surface may change in a straight line (a single inclined surface), or it may change in a stepped manner. The width of the groove 76A may be constant along the direction of extension of the groove, or it may vary. If it varies, it is preferable that it widens as it approaches the suction port 6a, considering the smooth movement of dust. If it varies, the side surface may change linearly (a single inclined surface), the side surface may change in a stepped manner, both sides of a pair may change, or one side surface may change.

[0065] (21) The second fixed cleaning section 73 was provided in one row (one section), but it may be provided in two rows. If two rows are provided, it is preferable that the rear second fixed cleaning section is higher (in other words, closer to the cleaning surface) than the front second fixed cleaning section. The second fixed cleaning unit 73 was continuous in the left-right direction, but it may be discontinuous. In other words, it may be a single second fixed cleaning unit, or it may be a plurality of second fixed cleaning units arranged in the left-right direction (in this case, it is preferable to arrange adjacent second fixed cleaning units in close proximity). The second fixed cleaning section 73 extends in a direction parallel to the left-right direction, but may be inclined to move forward or backward as it approaches the center from the left-right end, or it may extend in a direction intersecting the left-right direction.

[0066] (22) The second fixed cleaning section 73 may have a bent section (713) like the first fixed cleaning section 71, and the bent section may be covered by a bumper. Alternatively, it may have a bent section (713) and an extendable section (715) like the first fixed cleaning section 71, with the extendable section being inserted through a through hole in the main body 60 and the bent section being covered by a bumper. Alternatively, it may have a bent section (713) and an extendable section (715) like the first fixed cleaning section 71, and be fixed to the main body 60 with the extendable section inserted through a through hole in the main body 60. (23) When the cover body 69 is detachably attached to the front of the second fixed cleaning section 73, the second fixed cleaning section 73 may extend continuously or discontinuously to the leftmost end in the left-right direction.

[0067] 3.Direction One end in the axial direction was defined as the right end when viewing the suction device from the front, but it could also be the left end.

[0068] <> Handheld vacuum cleaners will be explained using Figures 16 and 17. The vacuum cleaner 9001 comprises a main unit 9010 and a dust collection unit 9020. The main unit 9010 houses a battery 9011 and an electric blower 9013 within a case 9030. The electric blower 9013 is housed in the middle section of the case 9030, and the battery 9011 is housed in the rear section of the case 9030. The section where the battery 9011 is housed is narrower than the section where the electric blower 9013 is housed and serves as a handle 9012. The dust collection unit 9020 has a dust collection chamber 9021 in the front part of the case 9030. The dust collection unit 9020 is a so-called paper bag type, and a paper bag (not shown) is placed in the dust collection chamber 9021, but it may also be a cyclone type dust collection unit, for example. The dust collection chamber 9021 can be opened and closed by attaching or rotating a lid 9022 that is detachably provided to the case 9030.

[0069] The electric blower 9013 uses its suction power to draw dust from the main body suction port 9031 at the tip of the dust collection unit 9020, and collects the dust inside the dust collection chamber 9021. The dust collection unit 9020 rotatably supports a rotatable nozzle 9040 on a pivot shaft 9041 located on the side of the main unit suction port 9031 (rear side of the main unit suction port). When the nozzle 9040 is rotated in a direction that brings the main body suction port 9031 at the front end of the case 9030 closer to the connection port 9042 of the nozzle 9040, the main body suction port 9031 and the connection port 9042 are connected, and the dust collection unit 9020 and the nozzle 9040 communicate with each other. This allows dust to be sucked in from the nozzle-side suction port 9043 of the nozzle 9040. When the main body suction port 9031 and the connection port 9042 of the nozzle 9040 are connected, they are engaged by an engagement structure. In this engagement structure, a first protrusion 9044 provided around the connection port 9042 of the nozzle 9040 fits into a recess 9032 provided around the main body suction port 9031, and a second protrusion 9045 provided on the outer circumferential surface of the cylindrical part forming the nozzle 9040 (connection port 9042) engages with the cover part 9033 that covers (surrounds) the main body suction port 9031. Furthermore, as the nozzle 9040 rotates, the second protrusion 9045 comes into contact with the cover portion 9033, and further rotation causes the cover portion 9033 to elastically deform. When the nozzle 9040 is rotated in a direction that moves the main body suction port 9031 and the connection port 9042 away from each other, the engagement structure disengages, and the nozzle 9040 rotates until it is aligned with the back of the case 9030, resulting in the stored state. The stored state is maintained when the nozzle 9040 is housed in the recess 9035 of the case 9030, and the opening edge of the nozzle-side suction port 9043 of the nozzle 9040 engages with the protruding portion 9036 of the recess 9035 of the case 9030.

[0070] <<Invention>> The above embodiments and modifications include at least the following inventions: Each of the following inventions is not bound by the inventive features or the configuration of the embodiments of any other invention.

[0071] <Inventions 1, 2> 1. Prior art Japanese Patent Publication No. 2019-25289 discloses a vacuum cleaner attachment that removes dust from the left and right sides of a suction opening by having grooves on the side of the suction space where a communication opening exists that communicate with the suction opening.

[0072] 2. Problems that Inventions 1 and 2 aim to solve The above-mentioned suction device was insufficient to remove dust from at least one of the left or right sides of the suction port. Inventions 1 and 2 aim to provide a suction device that facilitates the removal of dust from at least one of the left and right sides of the suction port.

[0073] 3. Invention 1 The suction attachment for the first electric vacuum cleaner according to Invention 1 is It is equipped with a suction device body that is connected to an electric blower that generates suction force and has a suction port located on the bottom side, The suction device body has a first fixed cleaning section on its bottom wall, which is arranged to be aligned with the suction port in the left-right direction. The first fixed cleaning section extends from the front to the rear, approaching the suction port. This makes it easier to remove dust from at least one of the left or right sides of the suction port (the side where the fixed cleaning unit is located). The first fixed cleaning unit may be arranged on both the left and right sides of the suction port, or on one side. The first fixed cleaning section extends inclined from the front to the rear, approaching the suction port, but the angle of inclination is not particularly limited. The first fixed cleaning section may be provided along the bottom wall, which is aligned horizontally with respect to the suction port, extending from both ends in the horizontal direction, or at least one of the horizontal sections may not extend to the end. The first fixed cleaning section may be a single continuous unit (one piece) in the extension direction, or it may be a series of discontinuous units (several pieces) in the extension direction. The first fixed cleaning unit may be provided as one unit in the front-to-back direction, or multiple units may be provided.

[0074] The suction attachment for the second electric vacuum cleaner according to Invention 1 is, in the suction attachment for the first electric vacuum cleaner, The bottom wall has a groove that communicates with the suction port and extends toward the left and right ends, The groove is located behind the first fixed cleaning section. This makes it easier to suck up dust from the left and right outwards. In addition, dust that is missed by the first fixed cleaning section can be sucked up from the groove. The groove portion may extend toward the ends in the left-right direction, and may extend parallel to the left-right direction or inclined with respect to the left-right direction. The groove may be located on the rear side of the first fixed cleaning section. For example, the entire groove may be located in the area to the left and right of the suction port, or only a part of the groove may be present. An example of a partial groove is when it extends inclined from the rear end of the suction port, approaching the left and right ends, and then approaching the rear end of the suction tool.

[0075] The third vacuum cleaner suction attachment according to Invention 1 is a suction attachment for the first or second vacuum cleaner, The suction device body has a second fixed cleaning section extending in the left-right direction on its bottom wall, The second fixed cleaning section is located behind the groove. This improves airtightness between the device and the cleaning surface. Furthermore, increased airtightness enhances the suction power from the intake port. The second fixed cleaning section may extend in the left-right direction behind the suction port, or it may extend in the left-right direction to the left or right of the suction port in the front-to-back direction.

[0076] The fourth vacuum cleaner suction attachment according to Invention 1 is, in the suction attachments of the first to third vacuum cleaners, The second fixed cleaning section extends in the left-right direction behind the suction port. This improves airtightness between the device and the cleaning surface. Furthermore, increased airtightness enhances the suction power from the intake port. The second fixed cleaning section may extend continuously or discontinuously in the left-right direction.

[0077] The fifth vacuum cleaner suction attachment according to Invention 1 is, in the first to fourth vacuum cleaner suction attachments, The suction device body has a second fixed cleaning section extending in the left-right direction on its bottom wall, The second fixed cleaning unit is located behind the first fixed cleaning unit. This improves the airtightness between the first fixed cleaning unit and the second fixed cleaning unit. Furthermore, improved airtightness increases the suction power from the intake port. The second fixed cleaning section may extend continuously or discontinuously in the left-right direction. The second fixed cleaning section may extend parallel to the left-right direction or in a direction intersecting the left-right direction. The second fixed cleaning section may be located only behind the first fixed cleaning section, or it may span both the area behind the first fixed cleaning section and the area behind the suction port.

[0078] The sixth vacuum cleaner suction attachment according to Invention 1 is, in the first to fifth vacuum cleaner suction attachments, A rotating cleaning body having a cleaning body, A drive unit which is a drive source for rotating the rotating cleaning body around an axis parallel to the left-right direction, Equipped with, The suction device body is, A rotating cleaning chamber in which the aforementioned rotating cleaning body is rotatably arranged, A communication port is located on the central side in the axial direction of the rotating cleaning body, and is located behind the axis of the rotating cleaning body in a direction perpendicular to the axial direction, A projection that protrudes from the inner wall of the rotating cleaning chamber and contacts the rotating cleaning body. It has, The projection extends such that its extension direction intersects 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 front-rear direction. This allows the dust guided by the first fixed cleaning unit to be moved along the protruding body towards the axial center. There may be one projection or multiple projections. The projections may be extended continuously or discontinuously in the direction of extension.

[0079] The seventh vacuum cleaner suction attachment according to Invention 1 is, in the first to sixth vacuum cleaner suction attachments, The rear end of the protruding body is located on one side of the communication opening in the axial direction, and is closer to the one end than to the center of the rotating cleaning chamber. The front end of the protruding body is located, compared to the one end, near a virtual line that passes through one end of the communication opening in the axial direction and extends in the front-rear direction, The projection extends continuously from the rear end to the front end. This makes it easier for dust that has moved to the front end of the protruding body to be sucked into the communication port.

[0080] The eighth vacuum cleaner suction attachment according to Invention 1 is the same as the first to seventh vacuum cleaner suction attachments, The first fixed cleaning section extends to the left-right end of the bottom wall. This makes it easier to capture dust and debris near surfaces that intersect with the cleaning surface.

[0081] The ninth vacuum cleaner suction attachment according to Invention 1 is, in the suction attachments of the first to eighth vacuum cleaners, Rotating cleaning body and A drive unit which is a drive source for rotating the rotating cleaning body around an axis parallel to the left-right direction, A removable cover body that constitutes a part of the suction device body, the cover body that supports the axial end of the rotating cleaning body Equipped with, The bottom wall of the cover body constitutes part or all of the bottom wall on which the first fixed cleaning section is provided. This allows for improved dust collection capabilities with the detachable cover.

[0082] The 10th vacuum cleaner suction attachment according to Invention 1 is, in the 1st to 9th vacuum cleaner suction attachments, The bottom wall of the cover body constitutes part or all of the bottom wall in which the groove is provided. This makes it easier to suck up dust from the left and right sides using the detachable cover.

[0083] The 11th vacuum cleaner suction attachment according to Invention 1 is, in the 1st to 10th vacuum cleaner suction attachments, The groove is located on the rear side of the first fixed cleaning portion of the cover body. This makes it easier to suck up dust from the left and right sides using the detachable cover.

[0084] The 12th vacuum cleaner suction attachment according to Invention 1 is, in the 1st to 11th vacuum cleaner suction attachments, The bottom wall of the cover body has a third fixed cleaning section extending in the left-right direction, The third fixed cleaning unit is located behind the first fixed cleaning unit. This improves the airtightness between the removable cover and the cleaning surface. The third fixed cleaning unit may be provided adjacent to the second fixed cleaning unit in the left-right direction, or it may be provided spaced apart from it. The third fixed cleaning unit may be provided adjacent to the second fixed cleaning unit in the front-rear direction, or it may be provided at a step above the second fixed cleaning unit.

[0085] 4. Invention 2 The suction attachment for the first electric vacuum cleaner according to Invention 2 is: It is equipped with a suction device body that is connected to an electric blower that generates suction force and has a suction port located on the bottom side, The suction device body has a first fixed cleaning section on its bottom wall, which is positioned to be aligned with the suction port in the left-right direction, and a second fixed cleaning section, which is positioned to be aligned with the rear of the first fixed cleaning section. This makes it easier to remove dust from the left and right sides of the suction port. In particular, the airtightness between the first fixed cleaning section and the second fixed cleaning section is improved in the front-to-back direction, which can increase dust collection efficiency. The first fixed cleaning unit may be arranged on both the left and right sides of the suction port, or on one side. The first fixed cleaning section may extend parallel to the left-right direction, or it may extend intersecting with the left-right direction. If it extends intersecting, it may extend closer to the suction port or further away from the suction port as it moves from the front to the rear. The first fixed cleaning section may be provided in the bottom wall aligned in the left-right direction of the suction port, extending from both ends in the left-right direction, or it may be provided leaving at least one end in the left-right direction untouched. The first fixed cleaning section and the second fixed cleaning section may have protrusions or island-like convex shapes. If the first fixed cleaning section and the second fixed cleaning section have protrusions, they may be a single continuous protrusion in the extension direction or multiple discontinuous protrusions in the extension direction. The first fixed cleaning unit and the second fixed cleaning unit may be provided as one unit in the front-to-back direction, or multiple units may be provided. The second fixed cleaning unit may be located behind the first fixed cleaning unit. For example, it may be aligned with the suction port in the left-right direction, or it may not be aligned with it. If it is not aligned with the suction port in the left-right direction, it will be located behind the suction port in the front-to-back direction. In this case, it may or may not extend to the rear of the suction port.

[0086] The suction attachment for the second electric vacuum cleaner according to Invention 2 is, in the suction attachment for the first electric vacuum cleaner, The bottom wall has a groove that communicates with the suction port and extends in the left-right direction, The groove is located between the first fixed cleaning section and the second fixed cleaning section. This makes it easier to remove dust from the left and right sides of the suction port. In particular, since grooves are provided in the airtight area between the first fixed cleaning section and the second fixed cleaning section in the front-to-back direction, dust collection efficiency can be improved. In addition, dust that is missed by the first fixed cleaning section can be sucked up through the grooves.

[0087] The third vacuum cleaner suction attachment according to Invention 2 is a suction attachment for the first or second vacuum cleaner, The second fixed cleaning section extends in the left-right direction behind the suction port. This improves the airtightness of the rear of the suction port, thereby increasing dust collection efficiency. In addition, dust that is not sucked in through the suction port can be captured by the second fixed cleaning unit, further increasing the dust collection rate.

[0088] The fourth vacuum cleaner suction attachment according to Invention 2 is, in the first to third vacuum cleaner suction attachments, The first fixed cleaning section extends to the left-right end of the bottom wall. This improves the airtightness between the bottom wall of the suction port body and the wall when the left and right ends of the suction port body are brought close to or in contact with a wall, thereby increasing dust collection efficiency. The left-right ends of the bottom wall may or may not coincide with the left-right ends of the suction device body. An example of when they do not coincide is when bumpers are provided on the left-right ends of the suction device body.

[0089] The fifth vacuum cleaner suction attachment according to Invention 2 is, in the first to fourth vacuum cleaner suction attachments, The first fixed cleaning unit is rod-shaped, and one end of it is fixed in place, inserted into the interior through a through-hole in the suction tool body. This makes it difficult for one end of the first fixed cleaning section to detach from the suction tool body.

[0090] The sixth vacuum cleaner suction attachment according to Invention 2 is, in the first to fifth vacuum cleaner suction attachments, The outer portion of the through-hole in the first fixed cleaning section is covered by a bumper. This makes it even more difficult for one end of the first fixed cleaning unit to detach from the suction tool body.

[0091] <Invention 3> 1. Prior art Japanese Patent Publication No. 2008-48901 discloses a suction nozzle having a napped cloth positioned on the front part of its lower surface.

[0092] 2. Problems that Invention 3 aims to solve The above-mentioned suction nozzle (suction device) had a problem in that the napped fabric on the bottom surface (bottom wall) would peel off due to friction with the cleaning surface. Invention 3 is to provide a suction device in which the cleaning part on the bottom wall is less likely to peel off.

[0093] 3. Invention 3 The suction attachment for the first electric vacuum cleaner according to Invention 3 is: It is equipped with a suction device body that is connected to an electric blower that generates suction force and has a suction port located on the bottom side, The suction device body has a fixed cleaning section on its bottom wall and a bumper that covers a part of the fixed cleaning section. The bumper is provided on at least one of the front wall, side wall, and rear wall of the suction device body. This makes it difficult for the fixed cleaning part to peel off. In addition, in invention 3, the direction in which the fixed cleaning part extends is not limited, and it may be in the front-to-back direction, the left-to-right direction, or an oblique direction that is inclined with respect to the front-to-back direction or the left-to-right direction.

[0094] The suction attachment for the second electric vacuum cleaner according to Invention 3 is, in the suction attachment for the first electric vacuum cleaner, The fixed cleaning unit is covered by the bumper with one end inserted into the interior through a through-hole in the suction tool body. This makes it less likely for the fixed cleaning unit to detach from the suction tool body.

[0095] The third vacuum cleaner suction attachment according to Invention 3 is the same as the second vacuum cleaner suction attachment, The fixed cleaning section is bent at the bending portion, and one end is inserted into the through hole. This makes it easier to attach the fixed cleaning unit to the suction device body.

[0096] The suction attachment for the fourth electric vacuum cleaner according to Invention 3 is the suction attachment for the second electric vacuum cleaner, The bumper is provided so as to cover the bent portion. This makes it less likely for the fixed cleaning unit to detach from the suction tool body.

[0097] The suction attachment for the fifth electric vacuum cleaner according to Invention 3 is the suction attachment for the first electric vacuum cleaner, The aforementioned fixed cleaning section is bent at the bending section, and the bending section is covered by the bumper. This makes it easier to secure the fixed cleaning unit with the bumper. Note that this configuration includes cases where the fixed cleaning unit is not inserted into the through-hole.

[0098] The suction attachment for the sixth electric vacuum cleaner according to Invention 3 is, in the suction attachment for the first electric vacuum cleaner, A removable cover body that constitutes a part of the suction device body, comprising a cover body that supports the axial end side of the rotating cleaning body, The bottom wall of the cover body constitutes part or all of the bottom wall on which the fixed cleaning section is provided. The bumper is provided on at least one of the front wall, side wall, and rear wall of the cover body. This makes the fixed cleaning part less likely to peel off.

[0099] <Other> Each invention focuses on the above-mentioned inventive features, and may or may not include the inventive features of other inventions. The same applies to inventions described in the specification other than Inventions 1 to 3. [Explanation of symbols]

[0100] 1. Vacuum cleaner body 3. Suction device 4 Rotating Cleaning Body 6. Suction device body 6a Inlet 6b Rotating Cleaning Room 6d protrusion 71 1st fixed cleaning section (fixed cleaning section) 72 1st fixed cleaning section (fixed cleaning section) 73 2nd fixed cleaning section (fixed cleaning section) 76 Groove 77 Groove

Claims

1. It is equipped with a suction device body that is connected to an electric blower that generates suction force and has a suction port located on the bottom side, The suction device body has a first fixed cleaning section on its bottom wall, which is arranged to be aligned with the suction port in the left-right direction. The first fixed cleaning unit extends from the front to the rear, approaching the suction port. Vacuum cleaner attachment.

2. The bottom wall has a groove that communicates with the suction port and extends toward the left and right ends, The groove is located on the rear side of the first fixed cleaning section. The suction attachment for the electric vacuum cleaner according to claim 1.

3. The suction device body has a second fixed cleaning section extending in the left-right direction on its bottom wall, The second fixed cleaning section is located behind the groove, The vacuum cleaner suction attachment according to claim 2.

4. The second fixed cleaning section extends in the left-right direction behind the suction port, The vacuum cleaner suction attachment according to claim 3.

5. The suction device body has a second fixed cleaning section extending in the left-right direction on its bottom wall, The second fixed cleaning unit is located behind the first fixed cleaning unit, The suction attachment for the electric vacuum cleaner according to claim 1.

6. A rotating cleaning body having a cleaning body, A drive unit which is a drive source for rotating the rotating cleaning body around an axis parallel to the left-right direction, Equipped with, The suction device body is, A rotating cleaning chamber in which the aforementioned rotating cleaning body is rotatably arranged, A communication port is located on the central side in the axial direction of the rotating cleaning body, and is located behind the axis of the rotating cleaning body in a direction perpendicular to the axial direction, A projection that protrudes from the inner wall of the rotating cleaning chamber and contacts the rotating cleaning body. It has, The projection extends such that its extension direction intersects the axial direction, and as it moves from one end towards the center in the axial direction, the front end is located further forward than the rear end in the front-rear direction. A vacuum cleaner suction attachment according to any one of claims 1 to 5.

7. The rear end of the protruding body is located on one side of the communication opening in the axial direction, and is closer to the one end than to the center of the rotating cleaning chamber. The front end of the protruding body is located, compared to the one end, near a virtual line that passes through one end of the communication opening in the axial direction and extends in the front-rear direction, The projection extends continuously from the rear end to the front end. The suction attachment for the electric vacuum cleaner according to claim 6.

8. The first fixed cleaning section extends to the left-right end of the bottom wall, A vacuum cleaner suction attachment according to any one of claims 1 to 5.

9. Rotating cleaning body and A drive unit which is a drive source for rotating the rotating cleaning body around an axis parallel to the left-right direction, A removable cover body that constitutes a part of the suction device body, the cover body that supports the axial end of the rotating cleaning body Equipped with, The bottom wall of the cover body constitutes part or all of the bottom wall on which the first fixed cleaning section is provided. A vacuum cleaner suction attachment according to any one of claims 1 to 5.

10. The bottom wall of the cover body constitutes part or all of the bottom wall in which the groove is provided. The suction attachment for the electric vacuum cleaner according to claim 9.

11. The groove is located on the rear side of the first fixing and cleaning portion of the cover body. The suction attachment for the electric vacuum cleaner according to claim 10.

12. The bottom wall of the cover body has a third fixed cleaning section extending in the left-right direction, The third fixed cleaning unit is located behind the first fixed cleaning unit, The suction attachment for the electric vacuum cleaner according to claim 9.

13. A suction device comprising the suction device described in any one of claims 1 to 5, Vacuum cleaner.

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