Cleaning device

Abstract

To provide a technology capable of switching rotation and non-rotation of a brush in accordance with a position of a brush mounting member.SOLUTION: A cleaning device disclosed by the description may include: a drive shaft; a rotation transmission mechanism transmitting rotation of the drive shaft; a brush mounting member rotatable around a rotary shaft; a clutch mechanism connecting the rotation transmission mechanism and the brush mounting member; a brush mounted to the brush mounting member; and a brush moving mechanism which moves the brush mounting member between a proximity position proximate to a work surface and a separated position separated from the work surface. The clutch mechanism may transmit rotation from the rotation transmission mechanism to the brush mounting member when the brush mounting member is at the proximity position; when the brush mounting member is at the separated position, it may shield transmission of rotation from the rotation transmission mechanism to the brush mounting member.SELECTED DRAWING: Figure 26

Description

[Technical field]

[0001] The technology disclosed in this specification relates to a cleaning device. [Background technology]

[0002] The cleaning device disclosed in Patent Document 1 includes a drive shaft, a rotation transmission mechanism that transmits rotation of the drive shaft, a brush mounting member connected to the rotation transmission mechanism and rotatable around a rotation axis, a brush attached to the brush mounting member, and a brush moving mechanism that moves the brush mounting member between a close position close to a work surface and a separated position away from the work surface. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] European Patent Application Publication No. 866172 Summary of the Invention [Problem to be solved by the invention]

[0004] In the cleaning device as described above, it is preferable that the brush is rotated when the brush attachment member is in the close position, and the brush is not rotated when the brush attachment member is in the separate position. This specification provides a technology that can switch between rotating and not rotating the brush depending on the position of the brush attachment member. [Means for solving the problem]

[0005] The cleaning device disclosed in this specification may include a drive shaft, a rotation transmission mechanism for transmitting rotation of the drive shaft, a brush attachment member rotatable about a rotation axis, a clutch mechanism for connecting the rotation transmission mechanism and the brush attachment member, a brush attached to the brush attachment member, and a brush moving mechanism for moving the brush attachment member between a close position close to a work surface and a separated position away from the work surface. The clutch mechanism may transmit rotation from the rotation transmission mechanism to the brush attachment member when the brush attachment member is in the close position, and may interrupt transmission of rotation from the rotation transmission mechanism to the brush attachment member when the brush attachment member is in the separated position.

[0006] According to the above configuration, when the brush attachment member is in the close position, the brush can be rotated, and when the brush attachment member is in the far position, the brush cannot be rotated. Whether the brush rotates or not can be switched depending on the position of the brush attachment member. [Brief description of the drawings]

[0007] [Figure 1] FIG. 2 is a perspective view of the cleaning device 2 according to the embodiment, as viewed from above on the front right. [Diagram 2] FIG. 2 is a perspective view of the cleaning device 2 according to the embodiment, seen from above and behind on the left. [Diagram 3] 1 is a vertical cross-sectional view of a cleaning device 2 according to an embodiment taken near the center in the left-right direction. [Figure 4] 2 is an exploded perspective view of a front main brush 20 and a rear main brush 22 of the cleaning device 2 according to the embodiment, as viewed from above on the front right. FIG. [Diagram 5] 2 is an exploded perspective view of a front main brush 20 and a rear main brush 22 of the cleaning device 2 according to the embodiment, as viewed from above on the front left. FIG. [Figure 6] 2 is a perspective view of the vicinity of a right front brush attachment portion 32 and a right rear brush attachment portion 36 of the cleaning device 2 according to the embodiment, as viewed from below on the front left side. FIG. [Figure 7]2 is a perspective view of the vicinity of the left front brush attachment portion 34 and the left rear brush attachment portion 38 of the cleaning device 2 according to the embodiment, as viewed from below on the front right side. FIG. [Figure 8] 3 is a vertical cross-sectional view of the vicinity of a left front brush attachment portion 34 of the cleaning device 2 according to the embodiment. FIG. [Figure 9] 2 is a perspective view of a main brush unit 23 and a side brush unit 152 of the cleaning device 2 according to the embodiment, as viewed from above on the front right. FIG. [Figure 10] FIG. 11 is a side view of the front wheel 8, the right rear wheel 10, the main brush unit 23 and the side brush unit 152 as viewed from the right in a state in which the rear main brush 22 has been moved upward in the cleaning device 2 according to the embodiment. [Figure 11] FIG. 11 is a side view of the front wheel 8, the right rear wheel 10, the main brush unit 23 and the side brush unit 152 as viewed from the right in a state in which the rear main brush 22 has been moved downward in the cleaning device 2 according to the embodiment. [Figure 12] 4 is a vertical cross-sectional view of the vicinity of a main brush lifting lever 94 of the cleaning device 2 according to the embodiment. FIG. [Figure 13] 2 is a perspective view of the vicinity of a main brush lifting lever 94 of the cleaning device 2 according to the embodiment, as viewed from above on the front right. FIG. [Figure 14] 2 is a perspective view of the dust container 13 of the cleaning device 2 according to the embodiment, seen from above on the front right. FIG. [Figure 15] FIG. 2 is a perspective view of the cleaning device 2 according to the embodiment with the dust container 13 removed, as viewed from below and rear right. [Figure 16] 2 is a cross-sectional view of the vicinity of a filter unit 120 and a fan unit 122 of the cleaning device 2 according to the embodiment. FIG. [Figure 17] FIG. 2 is an exploded perspective view of the filter unit 120 of the cleaning device 2 according to the embodiment, as viewed from the upper rear right. [Figure 18] 1 is a perspective view of a filter unit 120 of a cleaning device 2 according to an embodiment with a motor cover 138 removed, as viewed from above on the front left. [Figure 19] 2 is a vertical cross-sectional view of the vicinity of a fan unit 122 of the cleaning device 2 according to the embodiment. FIG. [Figure 20] 1 is a perspective view of a side brush 150 of a cleaning device 2 according to an embodiment, as viewed from above on the front right. [Figure 21] 1 is a perspective view of a side brush 150 of a cleaning device 2 according to an embodiment, as viewed from below and in the front right direction. [Figure 22] FIG. 2 is a perspective view of the vicinity of a side brush unit 152 of the cleaning device 2 according to the embodiment with the side brush 150 removed, as viewed from below and on the front left. [Diagram 23] 1 is a perspective view of a brush holder 154 of a cleaning device 2 according to an embodiment, as viewed from above on the front right. [Figure 24] FIG. 2 is a perspective view of the cleaning device 2 according to the embodiment, with the side brush 150 attached, and the vicinity of the side brush unit 152, as viewed from below on the front left side. [Diagram 25] 2 is a perspective cross-sectional view of a brush pulley 156 of the cleaning device 2 according to the embodiment, as viewed from above on the front right. FIG. [Figure 26] 1 is a vertical cross-sectional view of the cleaning device 2 according to the embodiment, in the vicinity of a side brush unit 152, in a state in which a side brush 150 has been moved upward. FIG. [Figure 27] 1 is a perspective view of a front portion of a brush base 160 of a cleaning device 2 according to an embodiment, as viewed from the front lower left. [Figure 28] 1 is a vertical cross-sectional view of the cleaning device 2 according to the embodiment, in the vicinity of a side brush unit 152, with a side brush 150 moved downward. FIG. [Figure 29] 1 is a vertical cross-sectional view of the cleaning device 2 according to the embodiment, in the vicinity of a side brush operating unit 180 with a side brush lifting lever 184 raised. FIG. [Diagram 30] 1 is a perspective view of a brush operating cable 178, a side brush lift lever 184, a lock-off switch 186, and a cable holder 188 of the cleaning device 2 according to the embodiment, as viewed from below and rear left. [Diagram 31] 1 is a vertical cross-sectional view of the cleaning device 2 according to the embodiment, in the vicinity of a side brush operating unit 180 in a state in which a side brush lifting lever 184 is pushed down. [Diagram 32] 2 is a perspective view of the vicinity of a switch operation unit 212 of the cleaning device 2 according to the embodiment, as viewed from above on the rear left side. FIG. [Diagram 33] 1 is a perspective view of the cleaning device 2 according to the embodiment with the body cover 108 removed, showing the vicinity of the right handle attachment portion 238 and the left handle attachment portion 240 as viewed from above on the front left side. [Diagram 34] 2 is a vertical cross-sectional view of the vicinity of a right handle attachment portion 238 of the cleaning device 2 according to the embodiment. FIG. [Diagram 35] 2 is a vertical cross-sectional view of the vicinity of a left handle attachment portion 240 of the cleaning device 2 according to the embodiment. FIG. [Diagram 36] 1 is a perspective view of the cleaning device 2 according to the embodiment, viewed from above and rear left, in the vicinity of a battery box 198 with a battery cover 264 open. FIG. [Figure 37] 1 is a perspective view of the cleaning device 2 according to the embodiment with the handle unit 6 folded relative to the main unit 4, as viewed from above on the front right. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Representative, non-limiting embodiments of the present invention are described in detail below with reference to the drawings. This detailed description is intended simply to provide those skilled in the art with details for implementing preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Additionally, the additional features and inventions disclosed can be used separately or in conjunction with other features and inventions to provide further improved cleaning devices.

[0009] In addition, the combinations of features and steps disclosed in the following detailed description are not essential for implementing the present invention in the broadest sense, but are specifically described only to illustrate representative embodiments of the present invention. Furthermore, the various features of the following representative embodiments and the various features described in the claims do not have to be combined in the exact manner of the embodiments described herein or in the order listed in order to provide additional and useful embodiments of the present invention.

[0010] All features described in the specification and / or claims are intended to be disclosed individually and independently of one another as limitations to the specific features described in the original disclosure and claims, apart from the configuration of features described in the examples and / or claims. Furthermore, all numerical ranges and group or aggregate descriptions are intended to disclose intermediate configurations thereof as limitations to the specific features described in the original disclosure and claims.

[0011] In one or more embodiments, a cleaning device may include a drive shaft, a rotation transmission mechanism for transmitting rotation of the drive shaft, a brush attachment member rotatable about a rotation axis, a clutch mechanism for connecting the rotation transmission mechanism to the brush attachment member, a brush attached to the brush attachment member, and a brush moving mechanism for moving the brush attachment member between a close position close to a work surface and a distant position away from the work surface. The clutch mechanism may transmit rotation from the rotation transmission mechanism to the brush attachment member when the brush attachment member is in the close position, and may interrupt transmission of rotation from the rotation transmission mechanism to the brush attachment member when the brush attachment member is in the distant position.

[0012] According to the above configuration, when the brush attachment member is in the close position, the brush can be rotated, and when the brush attachment member is in the far position, the brush cannot be rotated. Whether the brush rotates or not can be switched depending on the position of the brush attachment member.

[0013] In one or more embodiments, the rotation transmission mechanism may include a brush rotating member that rotates with the rotation of the drive shaft, and the clutch mechanism may include a clutch pawl provided on one of the brush rotating member and the brush attachment member, and a clutch rib provided on the other of the brush rotating member and the brush attachment member.

[0014] According to the above configuration, a clutch mechanism can be realized with a simple configuration that transmits rotation from the rotation transmission mechanism to the brush mounting member when the brush mounting member is in the close position, and cuts off the transmission of rotation from the rotation transmission mechanism to the brush mounting member when the brush mounting member is in the separated position.

[0015] In one or more embodiments, the brush may be removably attached to the brush mounting member.

[0016] When the brush attachment member is in the close position, it may be difficult to attach and detach the brush to and from the brush attachment member because the brush attachment member is located close to the work surface. According to the above configuration, the brush can be attached and detached to and from the brush attachment member when the brush attachment member is in the separated position, making it easy to attach and detach the brush to and from the brush attachment member. In addition, when the brush attachment member is in the separated position, the clutch mechanism blocks the transmission of rotation from the rotation transmission mechanism to the brush attachment member, making it safe to attach and detach the brush to and from the brush attachment member.

[0017] In one or more embodiments, the cleaning device may further include a brush operating unit coupled to the brush moving mechanism and configured to receive an operation from a user regarding the movement of the brush.

[0018] According to the above configuration, a user can move the brush attachment member between the close position and the separated position by operating the brush operating portion.

[0019] In one or more embodiments, the brush operating portion may be disposed in front of the brush attachment member when viewed from the user.

[0020] According to the above configuration, it is possible for the user to more easily operate the brush operation unit.

[0021] In one or more embodiments, the brush operating portion may include a support member and an operating lever supported by the support member so as to be rotatable between a proximity operating position that moves the brush mounting member to the proximity position and a separation operating position that moves the brush mounting member to the separation position.

[0022] According to the above configuration, a user can move the brush attachment member between the close position and the separate position by a simple operation of rotating the operation lever.

[0023] In one or more embodiments, the operating lever may include an engaging portion. The support member may include an engaged portion with which the engaging portion can engage. When the operating lever is in the separated operating position, the engaging portion may engage with the engaged portion.

[0024] According to the above configuration, when the operating lever is in the separated operating position and the user is not operating the operating lever, the operating lever can be held in the separated operating position and the brush mounting member can be held in the separated position.

[0025] In one or more embodiments, the operating lever may include a lever body and a switch member movably held on the lever body and having the engaging portion. When the user operates the switch member, the engaging portion may be released from engagement with the engaged portion.

[0026] According to the above configuration, by operating the switch member, the user can switch the operating lever from a state in which it is held at the away operating position to a state in which it is rotatable towards the approaching operating position.

[0027] In one or more embodiments, the brush operating portion may further include an adjustment member that restricts a movable range of the operating lever.

[0028] According to the above-mentioned configuration, the range of the approaching operation position that can be realized by the operating lever is restricted by the adjustment member, so that the range of the approaching position of the brush attachment member can be restricted, and it is possible to prevent the brush attachment member from approaching the work surface more than necessary.

[0029] In one or more embodiments, the brush operating unit may further include a holding member supported by the support member. The adjustment member may include a head portion that can be held by the user, and a shaft portion that is fixed to the head portion and screws into the holding member. The operation lever may be provided with a stopper portion that abuts against the shaft portion of the adjustment member. The user may rotate the head portion to move the shaft portion forward or backward relative to the support member, changing the position at which the stopper portion abuts against the shaft portion.

[0030] According to the above configuration, it is possible to realize an adjustment member that restricts the movable range of the operating lever with a simple configuration.

[0031] In one or more embodiments, when the user pushes down the control lever, the brush attachment member may move to the adjacent position. When the user pushes up the control lever, the brush attachment member may move to the distant position.

[0032] According to the above configuration, it is possible for the user to easily and intuitively grasp the movement of the brush attachment member in response to the operation of the operating lever.

[0033] In one or more embodiments, the cleaning device may further include a brush operating cable connecting the brush operating part and the brush moving mechanism.

[0034] According to the above configuration, the brush operating part can be disposed at a position separated from the brush moving mechanism.

[0035] In one or more embodiments, the brush moving mechanism may include a movable shaft coupled to the brush operating cable and rotatably supporting the brush mounting member.

[0036] According to the above configuration, it is possible to realize a brush moving mechanism that moves the brush mounting member between the close position and the separated position in response to the advancement and retreat of the brush operating cable, with a simple configuration.

[0037] In one or more embodiments, the brush moving mechanism may further include a shaft cable coupled to the movable shaft, and a cable connector connecting the brush operating cable and the shaft cable.

[0038] According to the above configuration, the cleaning device can be assembled by connecting the brush operating cable and the shaft cable with the cable connector in a state in which the brush attachment member, the movable shaft, and the shaft cable are pre-assembled, thereby improving the ease of assembly of the cleaning device.

[0039] In one or more embodiments, the brush moving mechanism may further include a guide pulley that guides the shaft cable.

[0040] According to the above configuration, the shaft cable can be moved smoothly in response to the advancement and retreat of the brush operating cable, and the movable shaft can be moved smoothly.

[0041] In one or more embodiments, the brush movement mechanism may move the brush attachment member between the approach position and the away position without changing the orientation of the brush attachment member relative to the work surface.

[0042] If the attitude of the brush mounting member relative to the work surface changes when the brush moving mechanism moves the brush mounting member from the close position to the separate position, the dirt and dust adhering to the brush attached to the brush mounting member may be visible to the user, which may cause discomfort to the user. According to the above configuration, the attitude of the brush mounting member relative to the work surface does not change when the brush moving mechanism moves the brush mounting member from the close position to the separate position, so that the dirt and dust adhering to the brush attached to the brush mounting member is less likely to be visible to the user.

[0043] In one or more embodiments, the cleaning device may further include wheels and a chassis supported by the wheels.

[0044] According to the above-described configuration, in a cleaning device in which a work surface to be cleaned is located below, the operation of attaching and detaching the brush to and from the brush attachment member can be performed easily and safely.

[0045] In one or more embodiments, the cleaning device may further include a handle extending rearwardly and upwardly from the chassis and adapted for gripping by a user.

[0046] According to the above configuration, in a cleaning device which is operated by a user by gripping the handle, the brush can be easily attached to and detached from the brush attachment member.

[0047] (Example) As shown in FIG. 1, the cleaning device 2 includes a main unit 4 and a handle unit 6. The main unit 4 includes a front wheel 8 that is in contact with the work surface at the center in the left-right direction at the front, a right rear wheel 10 that is in contact with the work surface at the rear right, and a left rear wheel 12 that is in contact with the work surface at the rear left (see FIG. 2). As shown in FIG. 2, a dust container 13 is detachably attached to the rear of the main unit 4. The handle unit 6 is connected to the rear upper part of the main unit 4. When a user stands behind the cleaning device 2 and holds the upper part of the handle unit 6 with both hands and pushes it forward, the front wheel 8, the right rear wheel 10, and the left rear wheel 12 rotate, and the main unit 4 moves forward along the work surface. As shown in FIG. 1, a headlight 9 that illuminates the front of the main unit 4 is provided at the front end of the main unit 4.

[0048] As shown in FIG. 3, the main unit 4 includes a chassis 14 that supports a front wheel 8, a right rear wheel 10, and a left rear wheel 12. The front wheel 8 is a so-called rotating caster, and the wheel 8a is supported by a support 8b so as to be rotatable about a rotation axis extending in the left-right direction, and the support 8b is supported by the chassis 14 so as to be rotatable about a rotation axis extending in the up-down direction. The right rear wheel 10 is supported by a right rear wheel plate 16 (see FIG. 6) fixed to the chassis 14 so as to be rotatable about a rotation axis extending in the left-right direction. The left rear wheel 12 is supported by a left rear wheel plate 18 fixed to the chassis 14 so as to be rotatable about a rotation axis extending in the left-right direction. The rotation axis of the right rear wheel 10 and the rotation axis of the left rear wheel 12 are arranged coaxially.

[0049] (Front main brush 20 and rear main brush 22) A front main brush 20 and a rear main brush 22 are arranged side by side in the front-rear direction below the chassis 14. In the cleaning device 2, the front main brush 20 rotates in a direction with its lower end facing rearward, and the rear main brush 22 rotates in a direction with its lower end facing forward, thereby brushing up dirt on the work surface. The front main brush 20 and the rear main brush 22 are attached to a main brush unit 23 (see FIG. 9) provided in the main unit 4.

[0050] As shown in Fig. 4, the front main brush 20 includes a roll brush 24 and a brush cap 26. The roll brush 24 includes a brush shaft 24a having a generally cylindrical shape extending in the left-right direction, and brush bristles 24b planted on the surface of the brush shaft 24a. The rear main brush 22 includes a roll brush 28 and a brush cap 30. The roll brush 28 includes a brush shaft 28a having a generally cylindrical shape extending in the left-right direction, and brush bristles 28b planted on the surface of the brush shaft 28a. In the attached drawings, for clarity of illustration, only the shapes of the envelope surfaces at the tips of the brush bristles 24b, 28b are illustrated, and detailed illustration is omitted. In the front main brush 20, the brush bristles 24b are planted in a spiral shape that progresses counterclockwise from the right end of the brush shaft 24a toward the center to the right of the center of the brush shaft 24a, and in a spiral shape that progresses clockwise from the left end of the brush shaft 24a toward the center to the left of the center of the brush shaft 24a. In the rear main brush 22, the brush bristles 28b are planted in a spiral shape that progresses clockwise from the right end of the brush shaft 28a toward the center to the right of the center of the brush shaft 28a, and in a spiral shape that progresses counterclockwise from the left end of the brush shaft 28a toward the center to the left of the center of the brush shaft 28a.

[0051] At the right end of the brush shaft 24a, a cylindrical groove 24c having a substantially cylindrical shape and an engagement groove 24d extending from the cylindrical groove 24c are formed. The engagement groove 24d has a linear groove shape extending in the radial direction. In this embodiment, the engagement groove 24d has a groove shape in the shape of a letter "-". As shown in FIG. 5, at the left end of the brush shaft 24a, a cylindrical groove 24e having a substantially cylindrical shape and an engagement groove 24f extending from the cylindrical groove 24e are formed. The engagement grooves 24f each extend in the radial direction and have a plurality of linear groove shapes perpendicular to each other. In this embodiment, the engagement groove 24f has a groove shape in the shape of a letter "+". The groove width of the engagement groove 24f is smaller than the groove width of the engagement groove 24d. At the left end of the brush shaft 28a, a cylindrical groove 28c having a substantially cylindrical shape and an engagement groove 28d extending from the cylindrical groove 28c are formed. The engagement groove 28d has a linear groove shape extending in the radial direction. In this embodiment, the engagement groove 28d has a groove shape shaped like a letter "-". As shown in FIG. 4, a cylindrical groove 28e having a substantially cylindrical shape and an engagement groove 28f extending from the cylindrical groove 28e are formed at the right end of the brush shaft 28a. The engagement grooves 28f each extend in the radial direction and have a plurality of linear groove shapes perpendicular to each other. In this embodiment, the engagement groove 28f has a groove shape shaped like a letter "+". The groove width of the engagement groove 28f is smaller than the groove width of the engagement groove 28d.

[0052] The brush cap 26 includes a cap portion 26a that covers the left end of the brush shaft 24a, a holding groove 26b (see FIG. 5) formed on the outer surface of the cap portion 26a, a cylindrical portion 26c that is substantially cylindrical and protrudes from the inner surface of the cap portion 26a, and an engagement portion 26d that extends from the side surface of the cylindrical portion 26c. The engagement portion 26d has a linear rib shape that extends in the radial direction. In this embodiment, the engagement portion 26d has a --shaped rib shape. The diameter of the cylindrical portion 26c is slightly smaller than the diameters of the cylindrical grooves 24c and 24e of the brush shaft 24a. The rib width of the engagement portion 26d is smaller than the groove width of the engagement groove 24d of the brush shaft 24a and is smaller than the groove width of the engagement groove 24f. Therefore, when the brush cap 26 is attached to the left end of the brush shaft 24a, the cylindrical portion 26c enters the cylindrical groove 24e and the engagement portion 26d enters the engagement groove 24f. The brush cap 30 includes a cap portion 30a that covers the left end of the brush shaft 28a, a holding groove 30b (see FIG. 5) formed on the outer surface of the cap portion 30a, a cylindrical portion 30c that is substantially cylindrical and protrudes from the inner surface of the cap portion 30a, and an engagement portion 30d that is formed on the side surface of the cylindrical portion 30c. The engagement portion 30d has a linear rib shape that extends in the radial direction. In this embodiment, the engagement portion 30d has a cross-shaped rib shape. The diameter of the cylindrical portion 30c is slightly smaller than the diameters of the cylindrical grooves 28c and 28e of the brush shaft 28a. The rib width of the engagement portion 30d is smaller than the groove width of the engagement groove 28d of the brush shaft 28a and is smaller than the groove width of the engagement groove 28f. Therefore, when the brush cap 30 is attached to the left end of the brush shaft 28a, the cylindrical portion 30c enters the cylindrical groove 28c, and the engagement portion 30d enters the engagement groove 28d.

[0053] The roll brush 28 has the same shape and configuration as the roll brush 24 when turned over. This allows common parts to be used for the roll brush 24 and the roll brush 28. The brush cap 26 has the same shape and configuration as the brush cap 30. This allows common parts to be used for the brush cap 26 and the brush cap 30.

[0054] The front main brush 20 has a right end attached to a right front brush mounting portion 32 (see FIG. 6) of the main brush unit 23, and a left end attached to a left front brush mounting portion 34 (see FIG. 7) of the main brush unit 23. The rear main brush 22 has a right end attached to a right rear brush mounting portion 36 (see FIG. 6) of the main brush unit 23, and a left end attached to a left rear brush mounting portion 38 (see FIG. 7) of the main brush unit 23. As shown in FIG. 6, the right front brush mounting portion 32 and the right rear brush mounting portion 36 are disposed in the right lower portion of the main unit 4. As shown in FIG. 7, the left front brush mounting portion 34 and the left rear brush mounting portion 38 are disposed in the left lower portion of the main unit 4.

[0055] As shown in FIG. 6, the right front brush attachment part 32 includes a driven shaft 40 and a holder 42. The holder 42 holds the driven shaft 40 rotatably with the left-right direction as a rotation axis. The driven shaft 40 includes a cylindrical part 40a protruding in a substantially cylindrical shape and an engagement part 40b extending from the cylindrical part 40a. The engagement part 40b has a linear rib shape extending in the radial direction. In this embodiment, the engagement part 40b has a --shaped rib shape. The diameter of the cylindrical part 40a is slightly smaller than the diameter of the cylindrical groove 24c of the brush shaft 24a of the front main brush 20. The rib width of the engagement part 40b is slightly smaller than the groove width of the engagement groove 24d of the brush shaft 24a of the front main brush 20 and larger than the groove width of the engagement groove 24f of the brush shaft 28a of the rear main brush 22. For this reason, the right end of the front main brush 20 can be attached to the driven shaft 40, but the right end of the rear main brush 22 cannot be attached to the driven shaft 40. By adopting such a configuration, it is possible to prevent the rear main brush 22 from being erroneously attached to the right front brush attachment portion 32.

[0056] The right rear brush attachment portion 36 includes a driven shaft 44 and a holder 46. The holder 46 holds the driven shaft 44 rotatably with the left-right direction as a rotation axis. The driven shaft 44 includes a cylindrical portion 44a protruding in a substantially cylindrical shape and an engagement portion 44b extending from the cylindrical portion 44a. The engagement portions 44b each extend in the radial direction and have a plurality of linear rib shapes that are perpendicular to each other. In this embodiment, the engagement portion 44b has a +-shaped rib shape. The diameter of the cylindrical portion 44a is slightly smaller than the diameter of the cylindrical groove 28e of the brush shaft 28a of the rear main brush 22. The rib width of the engagement portion 44b is slightly smaller than the groove width of the engagement groove 28f of the brush shaft 28a of the rear main brush 22. For this reason, the right end of the rear main brush 22 can be attached to the driven shaft 44, but the right end of the front main brush 20 cannot be attached to it. With this configuration, it is possible to prevent the front main brush 20 from being erroneously attached to the right rear brush attachment portion 36.

[0057] As shown in FIG. 7, the left front brush attachment part 34 includes a plunger pin 48, a holder 50, and a compression spring 52 (see FIG. 8). As shown in FIG. 8, the holder 50 holds the plunger pin 48 so that it can move in the left-right direction and rotate around the left-right direction as a rotation axis. The compression spring 52 is housed inside the holder 50 and urges the plunger pin 48 rightward relative to the holder 50. The tip of the plunger pin 48 has a substantially hemispherical shape. As shown in FIG. 7, the left rear brush attachment part 38 includes a plunger pin 54, a holder 56, and a compression spring 58 (see FIG. 8). As shown in FIG. 8, the holder 56 holds the plunger pin 54 so that it can move in the left-right direction and rotate around the left-right direction as a rotation axis. The compression spring 58 is housed inside the holder 56 and urges the plunger pin 54 rightward relative to the holder 56. The tip of the plunger pin 54 has a substantially hemispherical shape.

[0058] When attaching the front main brush 20 to the main body unit 4, first, as shown in FIG. 8, the plunger pin 48 of the left front brush attachment part 34 is inserted into the retaining groove 26b of the brush cap 26, and the front main brush 20 is pushed toward the left front brush attachment part 34. As a result, the plunger pin 48 moves leftward against the biasing force of the compression spring 52, and the right end of the front main brush 20 is positioned leftward of the right front brush attachment part 32. From this state, the cylindrical part 40a (see FIG. 6) of the right front brush attachment part 32 is inserted into the cylindrical groove 24c (see FIG. 4) at the right end of the front main brush 20, and the engagement part 40b (see FIG. 6) of the right front brush attachment part 32 is inserted into the engagement groove 24d (see FIG. 4) at the right end of the front main brush 20. As a result, the front main brush 20 is attached to the right front brush attachment part 32 and the left front brush attachment part 34. In this state, the plunger pin 48 of the left front brush attachment part 34 is pressed against the brush cap 26 of the front main brush 20 by the biasing force of the compression spring 52, and the brush shaft 24a (see FIG. 4) of the front main brush 20 is pressed against the driven shaft 40 (see FIG. 6) of the right front brush attachment part 32. This makes it possible to prevent the front main brush 20 from suddenly falling off the right front brush attachment part 32 or the left front brush attachment part 34. When removing the front main brush 20 from the body unit 4, the front main brush 20 is pushed toward the left front brush attachment part 34 against the biasing force of the compression spring 52. As a result, the cylindrical part 40a of the right front brush attachment part 32 comes out of the cylindrical groove 24c at the right end of the front main brush 20, and the engagement part 40b of the right front brush attachment part 32 comes out of the engagement groove 24d at the right end of the front main brush 20. Thereafter, the front main brush 20 is moved downward and to the right, whereby the plunger pin 48 of the left front brush attachment part 34 comes out of the retaining groove 26b of the brush cap 26. As a result, the front main brush 20 is removed from the right front brush attachment part 32 and the left front brush attachment part 34.

[0059] Similarly, when attaching the rear main brush 22 to the main body unit 4, first, as shown in FIG. 8, the plunger pin 54 of the left rear brush attachment part 38 is inserted into the retaining groove 30b of the brush cap 30, and the rear main brush 22 is pushed toward the left rear brush attachment part 38. As a result, the plunger pin 54 moves leftward against the biasing force of the compression spring 58, and the right end of the rear main brush 22 is disposed to the left of the right rear brush attachment part 36. From this state, the cylindrical part 44a (see FIG. 6) of the right rear brush attachment part 36 is inserted into the cylindrical groove 28e (see FIG. 4) at the right end of the rear main brush 22, and the engagement part 44b (see FIG. 6) of the right rear brush attachment part 36 is inserted into the engagement groove 28f (see FIG. 4) at the right end of the rear main brush 22. As a result, the rear main brush 22 is attached to the right rear brush attachment part 36 and the left rear brush attachment part 38. In this state, the plunger pin 54 of the left rear brush mounting part 38 is pressed against the brush cap 30 of the rear main brush 22 by the biasing force of the compression spring 58, and the brush shaft 28a (see FIG. 4) of the rear main brush 22 is pressed against the driven shaft 44 (see FIG. 6) of the right rear brush mounting part 36. This makes it possible to prevent the rear main brush 22 from suddenly falling off the right rear brush mounting part 36 or the left rear brush mounting part 38. When removing the rear main brush 22 from the body unit 4, the rear main brush 22 is pushed toward the left rear brush mounting part 38 against the biasing force of the compression spring 58. As a result, the cylindrical part 44a of the right rear brush mounting part 36 comes out of the cylindrical groove 28e at the right end of the rear main brush 22, and the engaging part 44b of the right rear brush mounting part 36 comes out of the engaging groove 28f at the right end of the rear main brush 22. Thereafter, the rear main brush 22 is moved downward and to the right, whereby the plunger pin 54 of the left rear brush attachment part 38 comes out of the retaining groove 30b of the brush cap 30. As a result, the rear main brush 22 is removed from the right rear brush attachment part 36 and the left rear brush attachment part 38.

[0060] (Main brush unit 23) As shown in FIG. 9, the right front brush mounting portion 32 and the right rear brush mounting portion 36 are supported by a right brush plate 60, and the left front brush mounting portion 34 and the left rear brush mounting portion 38 are supported by a left brush plate 62. The holder 42 (see FIG. 6) of the right front brush mounting portion 32 and the holder 46 (see FIG. 6) of the right rear brush mounting portion 36 are fixed to the right brush plate 60 in a state in which they penetrate the right brush plate 60 from left to right. The driven shaft 40 of the right front brush mounting portion 32 and the driven shaft 44 of the right rear brush mounting portion 36 each protrude to the right of the right brush plate 60. The holder 50 of the left front brush mounting portion 34 and the holder 56 of the left rear brush mounting portion 38 are fixed to the left brush plate 62 in a state in which they penetrate the left brush plate 62 from right to left. The right brush plate 60 and the left brush plate 62 are connected by a link member 64. The link member 64 is a C-shaped channel material having a longitudinal direction in the left-right direction. The right end of the link member 64 is fixed to the front upper part of the right brush plate 60, and the left end of the link member 64 is fixed to the front upper part of the left brush plate 62. Hereinafter, the right brush plate 60, the left brush plate 62, and the link member 64 are collectively referred to as the main brush support member 63.

[0061] As shown in FIG. 6, the right brush plate 60 is disposed to the right of the chassis 14. The holder 42 of the right front brush mounting portion 32 penetrates a right front opening 66 formed in the chassis 14 from right to left, and the holder 46 of the right rear brush mounting portion 36 penetrates a right rear opening 68 formed in the chassis 14 from right to left. The holder 42 of the right front brush mounting portion 32 has a cylindrical portion 42a having a substantially cylindrical shape. The axis of the cylindrical portion 42a is substantially aligned with the axis of the driven shaft 40. The right front opening 66 of the chassis 14 has an upper edge 66a and a lower edge 66b that correspond to the side shape of the cylindrical portion 42a. The cylindrical portion 42a of the holder 46 is rotatably supported by the upper edge 66a and the lower edge 66b of the right front opening 66 of the chassis 14, whereby the right brush plate 60 is rotatably supported by the chassis 14.

[0062] As shown in FIG. 7, the left brush plate 62 is disposed to the left of the chassis 14. The holder 50 of the left front brush mounting portion 34 penetrates a left front opening 70 formed in the chassis 14 from left to right, and the holder 56 of the left rear brush mounting portion 38 penetrates a left rear opening 72 formed in the chassis 14 from right to left. The holder 50 of the left front brush mounting portion 34 has a cylindrical portion 50a having a substantially cylindrical shape. The axis of the cylindrical portion 50a is substantially aligned with the axis of the plunger pin 48. The left front opening 70 of the chassis 14 has an upper edge 70a and a lower edge 70b that correspond to the side shape of the cylindrical portion 50a. The cylindrical portion 50a of the holder 50 is rotatably supported by the upper edge 70a and the lower edge 70b of the left front opening 70 of the chassis 14, whereby the left brush plate 62 is rotatably supported by the chassis 14.

[0063] As shown in FIG. 9, a brush motor 74 and a reduction gear mechanism 76 are attached to the upper part of the right brush plate 60. The output shaft of the brush motor 74 is aligned in the left-right direction. The brush motor 74 is supported by the reduction gear mechanism 76. The reduction gear mechanism 76 is, for example, a planetary gear reduction mechanism. The reduction gear mechanism 76 is fixed to the right brush plate 60 while penetrating the right brush plate 60 from left to right. The reduction gear mechanism 76 is connected to a drive shaft 77 that protrudes to the right beyond the right brush plate 60. The reduction gear mechanism 76 reduces the rotation of the output shaft of the brush motor 74 and transmits it to the drive shaft 77.

[0064] A drive pulley 78, a guide pulley 80, a front driven pulley 82, a rear driven pulley 84, and a tensioner pulley 86 are provided on the right side of the right brush plate 60. The drive pulley 78 is fixed to a drive shaft 77. The guide pulley 80 is rotatably supported by the right brush plate 60 at a front lower portion of the right brush plate 60. The front driven pulley 82 is fixed to a driven shaft 40 of the right front brush attachment portion 32. The rear driven pulley 84 is fixed to a driven shaft 44 of the right rear brush attachment portion 36. The tensioner pulley 86 is rotatably supported by a tensioner plate 88. The tensioner plate 88 is supported by the right brush plate 60 so as to be rotatable around a rotation shaft 88a. The tensioner plate 88 is also connected to the right brush plate 60 via a tension spring 90. A tension spring 90 biases the tensioner plate 88 in the rotational direction of the tensioner pulley 86 from rear to front relative to the right brush plate 60. A main drive belt 92 is stretched across the drive pulley 78, the guide pulley 80, the front driven pulley 82, the rear driven pulley 84, and the tensioner pulley 86. The main drive belt 92 is stretched from the front of the drive pulley 78 to the front of the guide pulley 80, from the rear of the guide pulley 80 to the front of the front driven pulley 82, from above the front driven pulley 82 to below the rear driven pulley 84, from above the rear driven pulley 84 to below the tensioner pulley 86, and from the front of the tensioner pulley 86 to the rear of the drive pulley 78. As a result, when the drive pulley 78 rotates counterclockwise when the right brush plate 60 is viewed from the right, the front driven pulley 82 rotates clockwise and the rear driven pulley 84 rotates counterclockwise. In other words, when the right brush plate 60 is viewed from the right, when the drive shaft 77 rotates counterclockwise by being driven by the brush motor 74, the driven shaft 40 of the right front brush attachment portion 32 rotates clockwise and the front main brush 20 rotates clockwise, and the driven shaft 44 of the right rear brush attachment portion 36 rotates counterclockwise and the rear main brush 22 rotates counterclockwise.Hereinafter, the drive pulley 78, the front driven pulley 82, and the main drive belt 92 are collectively referred to as the front main brush rotation transmission mechanism 81, and the drive pulley 78, the rear driven pulley 84, and the main drive belt 92 are collectively referred to as the rear main brush rotation transmission mechanism 83. The front main brush rotation transmission mechanism 81 and the rear main brush rotation transmission mechanism 83 are collectively referred to as the main brush rotation transmission mechanism 85. Note that the tensioner pulley 86 is pressed against the main drive belt 92 by the biasing force of the tension spring 90, thereby preventing the main drive belt 92 from becoming slack.

[0065] A cam piece 60a extending upward and rearward is formed on the upper rear portion of the right brush plate 60. A long hole 60b is formed in the cam piece 60a. The long axis of the long hole 60b is aligned with a straight line passing through the rotation axis of the driven shaft 40 (i.e., the rotation axis when the right brush plate 60 rotates with respect to the chassis 14) and the center of the long hole 60b.

[0066] A main brush lift lever 94 is provided near the right brush plate 60. The main brush lift lever 94 includes an operating arm 94a extending in the vertical direction, a grip 94b provided at the upper end of the operating arm 94a, a shutter support portion 94c formed below the grip 94b of the operating arm 94a, a pin support portion 94d formed below the shutter support portion 94c of the operating arm 94a, a spring support portion 94e formed below the pin support portion 94d of the operating arm 94a, a drive arm 94f bent from the lower end of the operating arm 94a and extending forward and downward, and a cam protrusion 94g protruding rightward from the vicinity of the lower end of the drive arm 94f. The main brush lift lever 94 is attached to a right handle plate 96 via a bolt 98 at a connection point between the operating arm 94a and the drive arm 94f. The right handle plate 96 is fixed to the chassis 14. The main brush lift lever 94 is supported by the right handle plate 96 via a bolt 98 so as to be rotatable about a rotation axis extending in the left-right direction. The main brush lift lever 94 can be tilted slightly left-right relative to the right handle plate 96 with the bolt 98 as a fulcrum. A cam protrusion 94g of the main brush lift lever 94 fits into the long hole 60b of the right brush plate 60. Therefore, when the main brush lift lever 94 rotates in the front-rear direction relative to the right handle plate 96, the cam protrusion 94g presses the edge of the long hole 60b, causing the right brush plate 60 to also rotate in the front-rear direction relative to the chassis 14. Hereinafter, the cam piece 60a of the right brush plate 60 and the cam protrusion 94g of the main brush lift lever 94 are collectively referred to as the main brush rotating mechanism 95, and the main brush lift lever 94 and the right handle plate 96 are collectively referred to as the main brush operating unit 97.

[0067] 10, when the main brush lift lever 94 is pulled rearward, the right brush plate 60 is at a rotation angle relative to the chassis 14 such that the vertical position of the driven shaft 40 of the right front brush attachment part 32 and the vertical position of the driven shaft 44 of the right rear brush attachment part 36 approximately match. In this case, the vertical positions of the lower ends of the front main brush 20 and the rear main brush 22 approximately match the vertical positions of the lower ends of the front wheel 8, the right rear wheel 10, and the left rear wheel 12.

[0068] As shown in Fig. 11, when the main brush lift lever 94 is pushed forward, the right brush plate 60 rotates relative to the chassis 14 in a direction in which the driven shaft 44 of the right rear brush attachment part 36 moves downward. In the state shown in Fig. 11, the driven shaft 44 of the right rear brush attachment part 36 is located lower than the driven shaft 40 of the right front brush attachment part 32. In this case, the vertical position of the lower end of the front main brush 20 is the same as the state shown in Fig. 10, but the lower end of the rear main brush 22 is located lower than the lower end of the front wheel 8, the lower end of the right rear wheel 10, and the lower end of the left rear wheel 12. This allows the brush bristles 28b of the rear main brush 22 to be strongly pressed against the work surface.

[0069] 9, a plurality of positioning holes 96a and an arc-shaped elongated hole 96b are formed in the right handle plate 96. The plurality of positioning holes 96a are arranged corresponding to the pin support portion 94d of the main brush lifting / lowering lever 94. The elongated hole 96b is arranged corresponding to the spring support portion 94e of the main brush lifting / lowering lever 94.

[0070] As shown in Fig. 12, a positioning pin 100 is attached to the pin support portion 94d of the main brush lifting lever 94. When the positioning pin 100 is inserted into one of the positioning holes 96a of the right handle plate 96, the rotation of the main brush lifting lever 94 relative to the right handle plate 96 is restricted. The spring support portion 94e of the main brush lifting lever 94 penetrates the long hole 96b of the right handle plate 96 from right to left. A first washer 102 fixed to the left end of the spring support portion 94e, a second washer 104 abutting against the left surface of the right handle plate 96, and a compression spring 106 that biases the first washer 102 leftward relative to the second washer 104 are attached to the spring support portion 94e. When the user is not operating the main brush lift lever 94, the main brush lift lever 94 is tilted leftward relative to the right handle plate 96 by the biasing force of the compression spring 106, and the positioning pin 100 is inserted into one of the positioning holes 96a. When the user tilts the main brush lift lever 94 rightward against the biasing force of the compression spring 106 to cause the positioning pin 100 to come out of the positioning hole 96a, the main brush lift lever 94 is allowed to rotate relative to the right handle plate 96. In this state, the user can adjust the rear main brush 22 to a desired vertical position by rotating the main brush lift lever 94 in the front-rear direction. After adjusting the vertical position of the rear main brush 22, when the user releases the main brush lift lever 94, the main brush lift lever 94 is tilted leftward relative to the right handle plate 96 by the biasing force of the compression spring 106, and the positioning pin 100 is inserted into the corresponding one of the positioning holes 96a. With this configuration, the vertical position of the rear main brush 22 can be adjusted in multiple stages.

[0071] 13, the operating arm 94a of the main brush lifting lever 94 passes from bottom to top through a lever opening 108a of a body cover 108 that covers the upper part of the chassis 14, and a grip 94b of the main brush lifting lever 94 is disposed outside the body cover 108. A shutter member 110 is attached to the main brush lifting lever 94 so that the user cannot see the inside of the main unit 4 through the lever opening 108a.

[0072] As shown in FIG. 9, the shutter member 110 has a shape obtained by curving a substantially rectangular plate material back and forth. The shutter member 110 has a long hole 110a. The shutter member 110 is placed on the shutter support portion 94c of the main brush lift lever 94 with the operation arm 94a of the main brush lift lever 94 penetrating the long hole 110a. The shutter support portion 94c has a shape obtained by curving a rectangle back and forth corresponding to the shutter member 110. The shutter member 110 is slidably supported by the shutter support portion 94c. The shutter support portion 94c has a size and shape that closes the long hole 110a regardless of the position of the operation arm 94a in the long hole 110a. 13, the shutter member 110 has a size and a shape that closes the lever opening 108a together with the shutter support portion 94c no matter what position the operating arm 94a is in the long hole 110a and no matter what position the operating arm 94a is in the lever opening 108a. With this configuration, it is possible to prevent the user from viewing the inside of the main unit 4 through the lever opening 108a.

[0073] (Dust Container 13) As shown in FIG. 3, the dirt picked up by the front main brush 20 and the rear main brush 22 moves from the front to the rear along the underside of the chassis 14 and is sent to the dust container 13 at the rear of the chassis 14.

[0074] As shown in FIG. 14, the dust container 13 has an opening 13a facing upward and forward. A partition 13b is provided inside the dust container 13, which is inclined from the top to the bottom as it moves from the front to the rear. The inside of the dust container 13 is divided into a lower storage chamber 13c and an upper storage chamber 13d by the partition 13b. A notch 13e is formed in the front edge of the partition 13b. Of the garbage sent from the main unit 4 to the dust container 13, larger garbage is stored in the lower storage chamber 13c, and smaller garbage is stored in the upper storage chamber 13d. With this configuration, it is possible to store more garbage than in the case where the partition 13b is not provided. In addition, by forming the notch 13e in the partition 13b, it is possible to make it easier for the garbage to move to the upper storage chamber 13d. An engagement groove 13f extending in the left-right direction is formed near the front end of the lower surface of the dust container 13. Further, a latch 13g is provided on the upper surface of the dust container 13 near the front end thereof.

[0075] As shown in FIG. 15, an engagement shaft 112 is provided at the lower rear of the main unit 4. The right end of the engagement shaft 112 is fixed to the right rear wheel plate 16, and the left end of the engagement shaft 112 is fixed to the left rear wheel plate 18. A duct 114 fixed to the chassis 14 is provided at the upper rear of the main unit 4. The rear end of the chassis 14 and the rear end of the duct 114 form an opening 116 facing rearward and downward. A rubber seal member 118 is attached to the rear end of the chassis 14 and the rear end of the duct 114, surrounding the upper, right, and left sides of the opening 116. A latch receiver 114a is formed on the upper surface of the duct 114 near the rear end.

[0076] As shown in FIG. 3, when attaching the dust container 13 to the main unit 4, first, the dust container 13 is tilted backward to engage the engagement groove 13f of the dust container 13 with the engagement shaft 112 of the main unit 4, and then the dust container 13 is raised forward to engage the latch 13g of the dust container 13 with the latch receiver 114a of the main unit 4. When the dust container 13 is attached to the main unit 4, the seal member 118 seals the gap between the chassis 14 and the dust container 13 and between the duct 114 and the dust container 13, so that it is possible to prevent the dust sent from the main unit 4 to the dust container 13 from leaking out to the outside. When removing the dust container 13 from the main unit 4, first, the latch 13g of the dust container 13 is disengaged from the latch receiver 114a of the main unit 4, and then the dust container 13 is tilted backward to move the dust container 13 to the rear of the main unit 4. This allows the engagement shaft 112 of the main unit 4 to come out of the engagement groove 13f of the dust container 13, and the dust container 13 can be removed from the main unit 4. When removing the dust container 13 from the main unit 4, the dust container 13 is first tilted backward, so that the dust contained in the dust container 13 can be prevented from spilling out of the dust container 13.

[0077] (Filter unit 120 and fan unit 122) 16, a filter unit 120 and a fan unit 122 are attached to the duct 114. In the cleaning device 2, the fan unit 122 sucks air through the duct 114 and the filter unit 120, thereby generating an airflow from below the chassis 14 toward the dust container 13. This promotes the movement of dust scooped up by the front main brush 20 and the rear main brush 22 into the dust container 13.

[0078] As shown in Fig. 17, the filter unit 120 includes a filter holder 124, a main filter 126, a sponge filter 128, and a pre-filter 130. The filter holder 124 includes a plurality of air holes 124a, an inner upper filter holding portion 124b, an inner lower filter holding portion 124c, an inner right guide rib 124d, an inner left guide rib 124e, an outer right filter holding portion 124f, an outer left filter holding portion 124g, a motor holding portion 124h (see Fig. 18), and a seal holding portion 124i. The inner upper filter holding portion 124b, the inner lower filter holding portion 124c, the inner right guide rib 124d, the inner left guide rib 124e, the outer right filter holding portion 124f, and the outer left filter holding portion 124g are formed on the rear side of the filter holder 124. The motor holding portion 124h (see FIG. 18) is formed on the front surface side of the filter holder 124. The seal holding portion 124i is formed on the outer circumferential surface of the filter holder 124.

[0079] The main filter 126 is a so-called HEPA (High Efficiency Particulate Air) filter. The main filter 126 is detachably attached to the filter holder 124. The main filter 126 includes a filter body 126a and a filter frame 126b that holds the filter body 126a. The filter frame 126b is formed with an upper engagement portion 126c that can be engaged with the inner upper filter holding portion 124b and a lower engagement portion 126d that can be engaged with the inner lower filter holding portion 124c. The main filter 126 is attached to the filter holder 124 by abutting the filter frame 126b against the rear surface of the filter holder 124 between the inner right guide rib 124d and the inner left guide rib 124e with the lower engagement portion 126d inserted into the inner lower filter holding portion 124c, and engaging the upper engagement portion 126c with the inner upper filter holding portion 124b. When the main filter 126 is attached to the filter holder 124, the filter body 126a of the main filter 126 covers the rear side of the multiple air holes 124a of the filter holder 124. The sponge filter 128 is housed inside the pre-filter 130. When the sponge filter 128 and the pre-filter 130 are attached to the filter holder 124, the sponge filter 128 covers the rear side of the filter body 126a of the main filter 126. The pre-filter 130 is detachably attached to the filter holder 124. The pre-filter 130 includes a cloth filter 130a and a filter frame 130b that holds the cloth filter 130a. The filter frame 130b is formed with a right engagement portion 130c that can be engaged with the outer right filter holding portion 124f and a left engagement portion 130d that can be engaged with the outer left filter holding portion 124g. The pre-filter 130 is attached to the filter holder 124 by abutting the filter frame 130b against the rear surface of the filter holder 124 with the left engagement portion 130d inserted into the outer left filter holding portion 124g and engaging the right engagement portion 130c with the outer right filter holding portion 124f. With the pre-filter 130 attached to the filter holder 124, the cloth filter 130a covers the sponge filter 128 from the rear side.

[0080] As shown in FIG. 18, a filter motor 132 is attached to the motor holding portion 124h of the filter holder 124. The filter motor 132 is, for example, a DC brushed motor. The filter motor 132 may be a DC brushless motor or an AC motor. The filter motor 132 includes an upper output shaft 132a that protrudes upward and a lower output shaft 132b that protrudes downward. An upper eccentric weight 134 is fixed to the upper output shaft 132a. A lower eccentric weight 136 is fixed to the lower output shaft 132b. The filter motor 132, the upper eccentric weight 134, and the lower eccentric weight 136 are covered at the front by a motor cover 138 (see FIG. 16). The motor cover 138 is fixed to the filter holder 124.

[0081] As shown in Fig. 16, a seal member 140 is attached to the seal holding portion 124i. The seal member 140 is a rubber member having a substantially square cross-sectional shape, an overall circular ring shape, and surrounds the outer surface of the filter holder 124. The duct 114 is formed with an inlet 114b that opens toward the rear. A filter unit attachment portion 114c to which the filter unit 120 can be attached is formed on the edge of the inlet 114b of the duct 114. The filter unit 120 is attached to the filter unit attachment portion 114c via the seal member 140.

[0082] When the fan unit 122 sucks in air, dust adheres to the rear surface of the fabric filter 130a of the pre-filter 130. If a large amount of dust adheres to the fabric filter 130a, the fan unit 122 will not be able to suck in air smoothly. When the filter motor 132 is driven, the filter motor 132 vibrates due to the rotation of the upper eccentric weight 134 (see FIG. 18) and the lower eccentric weight 136 (see FIG. 18), which causes the filter holder 124, the main filter 126, the sponge filter 128, and the pre-filter 130 to vibrate relative to the duct 114. As a result, dust adhering to the rear surface of the fabric filter 130a is shaken off and stored in the dust container 13. Note that, since the seal member 140 is interposed between the filter holder 124 and the duct 114, the filter holder 124 can be easily vibrated by the vibration of the filter motor 132.

[0083] Duct 114 has air flow path 114d through which air that has passed through filter unit 120 flows from right to left. An outlet 114e through which air flows out of duct 114 is formed near the left end of air flow path 114d. Outlet 114e opens forward.

[0084] The fan unit 122 includes an electric fan 142 and a sound-reducing box 144. The electric fan 142 is disposed facing the outlet 114e of the duct 114. The electric fan 142 includes a fan motor 146 and a centrifugal fan 148. The fan motor 146 is, for example, an inner rotor type DC brushless motor. The fan motor 146 may be an outer rotor type motor, a DC brushed motor, or an AC motor. An output shaft 146a of the fan motor 146 extends in the front-rear direction. The centrifugal fan 148 is fixed to the output shaft 146a. When the fan motor 146 is driven, the centrifugal fan 148 rotates, and the air in the duct 114 is sucked out through the outlet 114e.

[0085] As shown in FIG. 19, the sound deadening box 144 includes a fan housing chamber 144a, a first expansion chamber 144b, and a second expansion chamber 144c. The electric fan 142 is housed in the fan housing chamber 144a. The fan housing chamber 144a and the first expansion chamber 144b are partitioned by a first partition wall 144d. The first partition wall 144d extends from the upper inner surface of the sound deadening box 144 to the lower inner surface in the vertical direction. Also, as shown in FIG. 16, the first partition wall 144d extends from the right inner surface of the sound deadening box 144 to the left in the horizontal direction. A gap is provided between the left end of the first partition wall 144d and the left inner surface of the sound deadening box 144. As shown in FIG. 19, the first expansion chamber 144b and the second expansion chamber 144c are partitioned by a second partition wall 144e. As shown in FIG. 16, the second partition wall 144e extends from the right inner surface to the left inner surface of the sound deadening box 144 in the left-right direction. Also, as shown in FIG. 19, the second partition wall 144e extends downward from the upper inner surface of the sound deadening box 144 in the up-down direction. A gap is provided between the lower end of the second partition wall 144e and the lower inner surface of the sound deadening box 144. The front end of the second extension chamber 144c opens in the space between the chassis 14 of the main unit 4 and the body cover 108. The air sucked out of the duct 114 by the electric fan 142 passes through the fan housing chamber 144a, the first extension chamber 144b, and the second extension chamber 144c in this order, and then flows out into the inside of the main unit 4. The air that flows out into the inside of the main unit 4 flows out of the main unit 4 from the joint between the chassis 14 and the body cover 108. As described above, by providing the first expansion chamber 144b and the second expansion chamber 144c in the sound-absorbing box 144, the noise generated by driving the electric fan 142 can be attenuated, and loud noise can be prevented from reaching the outside of the main unit 4.

[0086] (Side Brush 150) 1, a side brush 150 is disposed on the right front portion of the main unit 4. In the cleaning device 2, the side brush 150 can be rotated on the work surface to send dirt near a wall, for example, toward the front main brush 20 and the rear main brush 22.

[0087] As shown in FIG. 20, the side brush 150 is a bevel-shaped brush and includes a brush cup 150a and brush bristles 150b. The brush cup 150a includes a substantially disk-shaped base 150c and a support portion 150d that protrudes downward from the vicinity of the radially outer end of the base 150c. The support portion 150d includes a bevel surface 150e that is inclined obliquely with respect to an axis passing through the center of the base 150c. The brush bristles 150b are planted on the bevel surface 150e of the brush cup 150a. The base 150c is formed with an engagement hole 150f and a pair of through holes 150g that are arranged on either side of the engagement hole 150f. The engagement hole 150f has, for example, a hexagonal shape. For example, one of the pair of through holes 150g is disposed opposite one side of the engagement hole 150f, and the other of the pair of through holes 150g is disposed opposite the side opposite to the one side of the engagement hole 150f. As shown in FIG. 21, the base 150c is formed with an outer engagement tube 150h protruding downward from the edge of the engagement hole 150f, and a pair of operation pieces 150i bent radially outward from the lower end of the outer engagement tube 150h and extending upward. The outer engagement tube 150h has, for example, a square tube shape with a hexagonal cross section. The pair of operation pieces 150i penetrate the pair of through holes 150g from below to above. As shown in FIG. 20, an engagement claw 150j is formed at the upper end of each of the pair of operation pieces 150i. The side brush 150 is attached to a side brush unit 152 (see FIG. 22) provided at the right front part of the main unit 4.

[0088] As shown in FIG. 22, the side brush unit 152 includes a brush holder 154, a brush pulley 156, and a movable shaft 158. As shown in FIG. 23, the brush holder 154 includes a bottom plate portion 154a having a substantially disk shape and a side plate portion 154b having a substantially cylindrical shape extending upward from the radially outer end of the bottom plate portion 154a. A plurality of clutch pawls 154c protruding radially outward are formed at the upper end of the side plate portion 154b. The plurality of clutch pawls 154c are arranged at a predetermined angular interval (for example, 45 degree interval) in the circumferential direction. As shown in FIG. 22, the bottom plate portion 154a includes an inner engagement tube 154d protruding downward and a plurality of engagement holes 154e arranged so as to surround the periphery of the inner engagement tube 154d. The inner engagement tube 154d has an inner surface having, for example, a circular cross-sectional shape and an outer surface having, for example, a hexagonal cross-sectional shape. The cross-sectional shape of the outer surface of the inner engagement tube 154d corresponds to the shape of the engagement hole 150f of the side brush 150. The engagement holes 154e are arranged in a line in the circumferential direction at a predetermined angular interval (for example, 60 degrees). For example, each of the engagement holes 154e is arranged facing each side of the outer surface of the inner engagement tube 154d. One engagement claw 150j of a pair of operation pieces 150i of the side brush 150 can be engaged with each of the engagement holes 154e. Hereinafter, the engagement claw 150j of the side brush 150 and the engagement holes 154e of the brush holder 154 are collectively referred to as the side brush engagement mechanism 151, and the outer engagement tube 150h of the side brush 150 and the inner engagement tube 154d of the brush holder 154 are collectively referred to as the side brush fitting mechanism 153.

[0089] As shown in Fig. 24, when attaching the side brush 150 to the brush holder 154, the user grips the side brush 150, aligns it with respect to the brush holder 154, and inserts the inner engagement tube 154d of the brush holder 154 into the engagement hole 150f of the side brush 150. When the side brush 150 is moved upward with respect to the brush holder 154 from this state, the engagement claws 150j of the pair of operation pieces 150i engage with corresponding ones of the multiple engagement holes 154e, and the side brush 150 is fixed to the brush holder 154. In this embodiment, the engagement hole 150f and the inner engagement tube 154d have a hexagonal shape, so that the pair of operation pieces 150i can be aligned with the multiple engagement holes 154e by inserting the inner engagement tube 154d into the engagement hole 150f. From this state, the pair of operation pieces 150i can be engaged with the corresponding ones of the multiple engagement holes 154e simply by moving the side brush 150 upward relative to the brush holder 154. In addition, since the engagement holes 150f and the inner engagement tube 154d have a hexagonal shape, the engagement holes 150f and the inner engagement tube 154d can be aligned by rotating the side brush 150 by a maximum of 60 degrees relative to the brush holder 154. Since the engagement holes 150f and the inner engagement tube 154d can be aligned without rotating the side brush 150 too much relative to the brush holder 154, the engagement holes 150f and the inner engagement tube 154d can be easily aligned even in a situation where the user cannot see the brush holder 154 from below.

[0090] When the side brush 150 is attached to the brush holder 154, the inner surface of the outer engagement tube 150h of the side brush 150 engages with the entire outer surface of the inner engagement tube 154d of the brush holder 154. With this configuration, it is possible to suppress stress concentration occurring when the brush holder 154 transmits rotation to the side brush 150.

[0091] When removing the side brush 150 from the brush holder 154, the user pushes each of the pair of operation pieces 150i from the outside to the inside in the radial direction below the base 150c of the side brush 150. This disengages the engagement claws 150j of the pair of operation pieces 150i from the engagement holes 154e. In this state, the user moves the side brush 150 downward relative to the brush holder 154, so that the inner engagement cylinder 154d comes out of the engagement hole 150f, and the side brush 150 can be removed from the brush holder 154.

[0092] (Side brush unit 152) As shown in FIG. 25, the brush pulley 156 includes an inner wall portion 156a having a substantially cylindrical shape, an outer wall portion 156b having a substantially cylindrical shape that surrounds the periphery of the inner wall portion 156a and is arranged coaxially with the inner wall portion 156a, a connecting portion 156c that connects the upper end of the inner wall portion 156a to the upper end of the outer wall portion 156b, and a drum portion 156d that protrudes radially outward from the lower end of the outer wall portion 156b. A plurality of reinforcing ribs 156e are formed between the outer surface of the outer wall portion 156b and the upper surface of the drum portion 156d. A plurality of clutch ribs 156f that protrude radially inward are formed on the inner surface of the outer wall portion 156b. The plurality of clutch ribs 156f extend upward from the lower end of the outer wall portion 156b. The multiple clutch ribs 156f are arranged corresponding to the multiple clutch pawls 154c (see FIG. 23) of the brush holder 154, and are arranged at predetermined angular intervals (for example, 45 degree intervals) in the circumferential direction.

[0093] As shown in FIG. 26, the brush pulley 156 is attached to a brush base 160 fixed to the chassis 14. As shown in FIG. 27, the brush base 160 includes a first inner wall portion 160a having a substantially semi-cylindrical shape, a second inner wall portion 160b having a substantially semi-cylindrical shape, and an outer wall portion 160c having a substantially cylindrical shape surrounding the first inner wall portion 160a and the second inner wall portion 160b. The first inner wall portion 160a and the second inner wall portion 160b have substantially the same shape except that they are inverted left and right. In addition, the first inner wall portion 160a, the second inner wall portion 160b, and the outer wall portion 160c are arranged on the same axis. A plurality of reinforcing ribs 160d are formed between the first inner wall portion 160a and the outer wall portion 160c, and between the second inner wall portion 160b and the outer wall portion 160c.

[0094] 26, an inner wall portion 156a of the brush pulley 156 is rotatably supported by an outer wall portion 160c of the brush base 160. In addition, a side plate portion 154b of the brush holder 154 is inserted between the inner wall portion 156a and the outer wall portion 156b of the brush pulley 156 from below the brush pulley 156.

[0095] 9, the brush base 160 is provided with a first guide pulley 162 and a second guide pulley 164. The first guide pulley 162 and the second guide pulley 164 are each rotatably supported by the brush base 160. In addition, an intermediate pulley 166 is fixed to the driven shaft 40 of the right front brush attachment portion 32. A sub-drive belt 168 is stretched across the drum portion 156d of the brush pulley 156, the first guide pulley 162, the second guide pulley 164, and the intermediate pulley 166. The sub-driving belt 168 is hung from above the intermediate pulley 166 to above the first guide pulley 162, hung from above the first guide pulley 162 to the right of the drum portion 156d, hung from the rear of the drum portion 156d to the front of the second guide pulley 164, and hung from the right of the second guide pulley 164 to below the intermediate pulley 166. When the intermediate pulley 166 rotates clockwise when the right brush plate 60 is viewed from the right by the drive of the brush motor 74, the brush pulley 156 rotates counterclockwise when the brush base 160 is viewed from above. Hereinafter, the driving pulley 78, the front driven pulley 82, the main driving belt 92, the driven shaft 40, the intermediate pulley 166, the brush pulley 156, and the sub-driving belt 168 are collectively referred to as a side brush rotation transmission mechanism 163.

[0096] As shown in FIG. 26, the movable shaft 158 ​​has a substantially cylindrical shape. The vicinity of the lower end of the movable shaft 158 ​​penetrates the inside of the inner engagement tube 154d of the brush holder 154, and is rotatably supported by the inner engagement tube 154d of the brush holder 154. The movable shaft 158 ​​also enters between the first inner wall portion 160a (see FIG. 27) and the second inner wall portion 160b from below the brush base 160, and is slidably supported by the first inner wall portion 160a and the second inner wall portion 160b. A tip of a shaft cable 172 is connected to the upper end of the movable shaft 158 ​​via a connection pin 170. The shaft cable 172 is stretched across a guide pulley 174. A cable connector 172a is provided at the rear end of the shaft cable 172. The guide pulley 174 is rotatably supported by the brush base 160. A compression spring 176 is also attached to the movable shaft 158. The compression spring 176 biases the brush holder 154 downward against a plurality of reinforcing ribs 160d of the brush base 160. Hereinafter, the movable shaft 158, the shaft cable 172, the cable connector 172a, and the guide pulley 174 are collectively referred to as a side brush moving mechanism 173.

[0097] As shown in FIG. 26, when the rear end of the shaft cable 172 is pulled backward, the movable shaft 158 ​​and the brush holder 154 are pulled upward against the biasing force of the compression spring 176. In this case, the tip of the brush bristles 150b of the side brush 150 is located above the lower end of the front wheel 8, and the side brush 150 is disposed above the working surface. In this case, the clutch pawl 154c of the brush holder 154 is located above the clutch rib 156f of the brush pulley 156, so that the clutch pawl 154c and the clutch rib 156f are not engaged. Therefore, even if the brush pulley 156 is rotated by the drive of the brush motor 74, the brush holder 154 and the side brush 150 do not rotate. The position of the brush holder 154 shown in FIG. 26 is also called the separated position.

[0098] As shown in FIG. 28, when the rear end of the shaft cable 172 is pushed forward, the movable shaft 158 ​​and the brush holder 154 are pushed downward by the urging force of the compression spring 176. In this case, the tip of the brush bristles 150b of the side brush 150 is located below the lower end of the front wheel 8, and the side brush 150 is pressed against the work surface. In this case, the clutch pawl 154c of the brush holder 154 and the clutch rib 156f of the brush pulley 156 are at approximately the same position in the vertical direction, so that the clutch pawl 154c and the clutch rib 156f are engaged with each other. Therefore, when the brush pulley 156 rotates by the drive of the brush motor 74, the brush holder 154 and the side brush 150 also rotate. The position of the brush holder 154 shown in FIG. 28 is also called the close position. Hereinafter, the clutch pawl 154c of the brush holder 154 and the clutch rib 156f of the brush pulley 156 will be collectively referred to as a clutch mechanism 155.

[0099] The chassis 14 may be provided with a protrusion (not shown) that interferes with the rotational path of the brush bristles 150b when the brush holder 154 is in the separated position but does not interfere with the rotational path of the brush bristles 150b when the brush holder 154 is in the close position. When the brush holder 154 is moved from the close position to the separated position while the side brush 150 is rotating, the side brush 150 continues to rotate for a while due to inertia even after the clutch pawl 154c and the clutch rib 156f of the clutch mechanism 155 are disengaged. If the side brush 150 continues to rotate even though the brush holder 154 has moved to the separated position, the user may mistakenly believe that the clutch mechanism 155 is not functioning. In the case where the above-mentioned protrusion is provided on the chassis 14, when the brush holder 154 is moved from the close position to the separated position while the side brush 150 is rotating, the clutch pawl 154c and the clutch rib 156f of the clutch mechanism 155 are disengaged, and then the brush bristles 150b repeatedly collide with the protrusion, so that the rotation of the side brush 150 due to inertia can be quickly stopped. This can prevent the user from misunderstanding that the clutch mechanism 155 is not functioning. In addition, by configuring the flexible brush bristles 150b to repeatedly collide with the protrusion, it is possible to prevent the chassis 14 and the side brush 150 from being damaged by collision. Note that the above-mentioned protrusion may be formed, for example, in a shape that guides the dust collected by the side brush 150 toward the front main brush 20 and the rear main brush 22.

[0100] As shown in Fig. 9, the front end of a brush operating cable 178 is attached to the brush base 160. The brush operating cable 178 includes an outer cable 178a and an inner cable 178b that is housed inside the outer cable 178a and is movable forward and backward relative to the outer cable 178a. The front end of the outer cable 178a is fixed to the brush base 160. The front end of the inner cable 178b is connected to a cable connector 172a at the rear end of the shaft cable 172. The rear end of the brush operating cable 178 extends to a side brush operating part 180 (see Fig. 1) provided on the handle unit 6.

[0101] As shown in FIG. 29, the side brush operating part 180 includes a case 182, a side brush lift lever 184, a lock-off switch 186, a cable holder 188, and an adjustment bolt 190. As shown in FIG. 30, the side brush lift lever 184 includes a lever body 184a disposed outside the case 182, a switch support part 184b formed on the upper part of the lever body 184a, and a rotating shaft 184c extending leftward from the lower left part of the lever body 184a and penetrating the case 182 from the outside to the inside. The lever body 184a is supported by the case 182 via the rotating shaft 184c so as to be rotatable about a rotation axis in the left-right direction. The lock-off switch 186 is supported by the switch support part 184b near the upper end of the lock-off switch 186 so as to be rotatable about a rotation axis in the left-right direction. As shown in FIG. 29, the lock-off switch 186 is biased backward with respect to the lever body 184a by a compression spring 192 disposed inside the lever body 184a. An engagement claw 186a is formed at the bottom of the lock-off switch 186. An engagement groove 182a corresponding to the engagement claw 186a is formed on the outer surface of the case 182. When the side brush lifting lever 184 is pulled all the way forward, the engagement claw 186a of the lock-off switch 186 engages with the engagement groove 182a. In this state, the side brush lifting lever 184 is restricted from being pushed down forward. When the user presses the lock-off switch 186, the engagement claw 186a of the lock-off switch 186 is disengaged from the engagement groove 182a, and the side brush lifting lever 184 is allowed to be pushed down forward.

[0102] The cable holder 188 is housed inside the case 182. As shown in FIG. 30, the cable holder 188 is fixed to a rotating shaft 184c of the side brush lifting lever 184. The cable holder 188 includes a support portion 188a that rotatably supports the rear end of the inner cable 178b of the brush operation cable 178, a guide groove 188b that guides the inner cable 178b, and a stopper portion 188c. As shown in FIG. 29, the rear end of the outer cable 178a of the brush operation cable 178 is disposed inside the case 182 and fixed to the case 182.

[0103] The adjustment bolt 190 includes a bolt 190a and an adjustment knob 190b fixed to the head of the bolt 190a. The bolt 190a penetrates the case 182 from the outside to the inside, and is screwed into a nut 194 arranged inside the case 182. The nut 194 is fixed to the case 182. As shown in FIG. 31, when the side brush lift-up lever 184 is pushed down, the tip of the bolt 190a abuts against a stopper portion 188c of the cable holder 188, thereby restricting the side brush lift-up lever 184 from being pushed down. The user can adjust the range within which the side brush lift-up lever 184 can be pushed down by rotating the adjustment knob 190b to adjust the position of the tip of the bolt 190a.

[0104] As shown in Fig. 29, when the side brush lifting lever 184 is pulled backward, the cable holder 188 pulls the rear end of the inner cable 178b, so that the inner cable 178b is pulled out relative to the outer cable 178a. In this case, as shown in Fig. 26, the rear end of the shaft cable 172 is pulled backward, so that the side brush 150 is pulled upward against the biasing force of the compression spring 176. The position of the side brush lifting lever 184 shown in Fig. 29 is also referred to as the separation operation position.

[0105] As shown in Figure 31, when the side brush lift lever 184 is pushed down forward, the cable holder 188 does not pull the rear end of the inner cable 178b, so the inner cable 178b is pushed in relative to the outer cable 178a. In this case, as shown in Figure 28, the rear end of the shaft cable 172 is not pulled rearward, and the side brush 150 is pushed downward by the biasing force of the compression spring 176. The position of the side brush lift lever 184 shown in Figure 31 is also referred to as the approach operation position.

[0106] As shown in FIG. 9, a roller 196 is disposed on the upper right front portion of the brush base 160. The roller 196 is supported by the brush base 160 so as to be rotatable around a rotation axis along the up-down direction. As shown in FIG. 1, the right front portion of the roller 196 protrudes to the outside of the body cover 108 through the roller opening 108b of the body cover 108. Therefore, even if the main unit 4 accidentally collides with a wall in front or to the right when the side brush 150 sends the dust near the wall to the front main brush 20 and the rear main brush 22, the roller 196 collides with the wall before the body cover 108. This configuration can prevent the wall and the body cover 108 from being damaged.

[0107] (Battery box 198 and ECU 204) As shown in Fig. 3, a battery box 198 is fixed to the upper surface of the chassis 14. As shown in Fig. 16, the battery box 198 is provided with a plurality of battery attachment parts 200. A plurality of battery packs 202 are detachably attached to each of the plurality of battery attachment parts 200. Each of the plurality of battery packs 202 includes a secondary battery cell (not shown), such as a lithium ion battery cell.

[0108] 3, an ECU (Electronic Control Unit) 204 is fixed to the upper surface of the chassis 14. The ECU 204 includes a control circuit board 206 and a case 208 that houses the control circuit board 206. The control circuit board 206 includes a microcontroller, multiple switching elements, and the like, and controls the operations of the headlights 9, the brush motor 74, the filter motor 132, and the fan motor 146 by controlling the power supplied from the multiple battery packs 202 to the headlights 9, the brush motor 74, the filter motor 132, and the fan motor 146.

[0109] (Handle unit 6) As shown in FIG. 1, the handle unit 6 includes a handle frame 210 having a substantially U-shape extending upward and rearward. The handle frame 210 is formed by bending a pipe material having a substantially circular cross section. The handle frame 210 includes a right straight portion 210a extending upward and rearward from the right rear upper portion of the main unit 4, a left straight portion 210b extending upward and rearward from the left rear upper portion of the main unit 4, an upper straight portion 210c extending in the left-right direction forward and above the upper end of the right straight portion 210a and the upper end of the left straight portion 210b, a right connecting portion 210d connecting the upper end of the right straight portion 210a to the right end of the upper straight portion 210c, and a left connecting portion 210e connecting the upper end of the left straight portion 210b to the left end of the upper straight portion 210c. The side brush operating portion 180 is disposed near the upper end of the right straight portion 210a of the handle frame 210.

[0110] A switch operation unit 212 is attached to the upper straight portion 210c of the handle frame 210. As shown in Fig. 32, the switch operation unit 212 includes a main power switch 214, a lock-off button 216, a brush rotation speed changeover button 218, a brush rotation speed indicator 220, a fan air volume changeover button 222, a fan air volume indicator 224, an illumination button 226, an illumination indicator light 228, a dust removal button 230, a dust removal indicator light 232, a remaining battery level indicator button 234, and a remaining battery level indicator 236.

[0111] The main power switch 214 is a dial switch that can be rotated between an ON position that turns on the main power of the cleaning device 2 and an OFF position that turns off the main power of the cleaning device 2. The main power switch 214 has a substantially disk-shaped base 214a and a substantially rectangular parallelepiped knob portion 214b that protrudes from the base 214a. The knob portion 214b has a recessed portion 214c that is recessed inward near the center of the long side of the knob portion 214b when viewed from a direction perpendicular to the base 214a. The lock-off button 216 is disposed in the recessed portion 214c of the main power switch 214. The lock-off button 216 is supported by the main power switch 214 so as to be movable between a lock position that protrudes outward from the knob portion 214b and a release position that moves toward the inside of the knob portion 214b from the lock position. The lock-off button 216 is biased from the release position toward the lock position by a compression spring (not shown). When the lock-off button 216 is in the lock position, the lock-off button 216 restricts the main power switch 214 from rotating from the off position to the on position. When the lock-off button 216 is in the release position, the lock-off button 216 allows the main power switch 214 to rotate from the off position to the on position. When the main power switch 214 rotates from the off position to the on position, the lock-off button 216 is held in the release position until the main power switch 214 subsequently rotates from the on position to the off position. With this configuration, it is possible to prevent the main power switch 214 from being unintentionally rotated from the off position to the on position by the user, and the main power of the cleaning device 2 from being turned on.

[0112] The brush rotation speed switching button 218 is a button for switching the rotation speed of the front main brush 20, the rear main brush 22, and the side brush 150. In the cleaning device 2, the rotation speed can be switched in multiple stages (for example, in two stages). The ECU 204 controls the rotation speed of the brush motor 74 when driving the brush motor 74, according to the rotation speed set by the brush rotation speed switching button 218. The brush rotation speed indicator 220 changes the number of lit windows according to the rotation speed set by the brush rotation speed switching button 218.

[0113] The fan air volume switching button 222 is a button for turning the electric fan 142 on / off and switching the air volume of the electric fan 142. In the cleaning device 2, the air volume of the electric fan 142 can be switched in multiple stages (for example, in two stages). The ECU 204 controls the rotation speed of the fan motor 146 when driving the fan motor 146, according to the air volume set by the fan air volume switching button 222. The fan air volume indicator 224 changes the number of windows that are lit up, according to the air volume of the electric fan 142 set by the fan air volume switching button 222.

[0114] The illumination button 226 is a button for switching the headlights 9 on / off. The illumination indicator light 228 is turned on when the headlights 9 are on and is turned off when the headlights 9 are off. The dust removal button 230 is a button for switching the filter motor 132 on / off. The dust removal indicator light 232 is turned on when the filter motor 132 is on and is turned off when the filter motor 132 is off. The battery remaining amount display button 234 is a button for switching the battery remaining amount indicator 236 on / off. When the battery remaining amount indicator 236 is on, it lights up a number of windows corresponding to the remaining battery amount of each of the multiple battery packs 202, and when it is off, it turns off all the windows.

[0115] 33, the lower end of the right straight section 210a of the handle frame 210 is connected to the right handle plate 96 of the main unit 4 via a right handle attachment section 238. The lower end of the left straight section 210b of the handle frame 210 is connected to the left handle plate 242 of the main unit 4 via a left handle attachment section 240. The left handle plate 242 is fixed to the chassis 14.

[0116] As shown in FIG. 34, the right handle attachment portion 238 includes a main body cam member 244, a handle cam member 246, and a cover member 248. The main body cam member 244 is fixed to the right handle plate 96. The main body cam member 244 includes an inner cylindrical portion 244a having a generally cylindrical shape extending in the left-right direction, and a cam portion 244b that is bent outward from the left end of the inner cylindrical portion 244a. The cam portion 244b is formed with a tooth surface 244c that faces rightward and has a plurality of protruding teeth. The handle cam member 246 and the cover member 248 are fixed to the right straight portion 210a of the handle frame 210. The handle cam member 246 is disposed to the left of the right straight portion 210a. The handle side cam member 246 includes a handle support portion 246a that supports the right straight portion 210a, and an outer cylindrical portion 246b that is connected to the lower end of the handle support portion 246a and has a generally cylindrical shape extending in the left-right direction. The inner diameter of the outer cylindrical portion 246b is slightly larger than the outer diameter of the inner cylindrical portion 244a. The inner cylindrical portion 244a is inserted into the outer cylindrical portion 246b from the left to the right. The inner cylindrical portion 244a supports the outer cylindrical portion 246b so that it can rotate. The handle support portion 246a is formed with a tooth surface 246c that faces leftward and has a plurality of protruding teeth. The tooth surface 246c is formed to mesh with the tooth surface 244c of the main body side cam member 244. The cover member 248 is disposed to the right of the right straight portion 210a. The cover member 248 includes a handle support portion 248a that supports the right straight portion 210a, and a shaft support portion 248b that supports the connecting shaft 250. The right end of the connecting shaft 250 is screwed into a nut 252 arranged on the outside of the shaft support portion 248b. The connecting shaft 250 passes through the inside of the inner cylindrical portion 244a, penetrates the right handle plate 96, and extends leftward. The connecting shaft 250 passes through the inside of a connecting pipe 254 supported on the upper surface of the duct 114, and extends to the left handle attachment portion 240.

[0117] As shown in FIG. 35, the left handle attachment portion 240 includes a main body side cam member 256, a handle side cam member 258, a cover member 260, and a lever member 262. The main body side cam member 256 is fixed to the left handle plate 242. The main body side cam member 256 includes an inner cylindrical portion 256a having a generally cylindrical shape extending in the left-right direction, and a cam portion 256b bent outward from the right end of the inner cylindrical portion 256a. The cam portion 256b is formed with a tooth surface 256c facing leftward and having a plurality of protruding teeth. The handle side cam member 258 and the cover member 260 are fixed to the left straight portion 210b of the handle frame 210. The handle side cam member 258 is disposed to the right of the left straight portion 210b. The handle side cam member 258 includes a handle support portion 258a that supports the left straight portion 210b, and an outer cylindrical portion 258b that is connected to the lower end of the handle support portion 258a and has a generally cylindrical shape extending in the left-right direction. The inner diameter of the outer cylindrical portion 258b is slightly larger than the outer diameter of the inner cylindrical portion 256a. The inner cylindrical portion 256a is inserted into the outer cylindrical portion 258b from the right to the left. The inner cylindrical portion 256a supports the outer cylindrical portion 258b so that it can rotate. The handle support portion 258a is formed with a tooth surface 258c that faces right and has multiple protruding teeth. The tooth surface 258c is formed to mesh with the tooth surface 256c of the main body side cam member 256. The cover member 260 is disposed to the left of the left straight portion 210b. The cover member 260 includes a handle support portion 260a that supports the left straight portion 210b, and a lever receiving portion 260b on which the lever member 262 is disposed. As shown in FIG. 33, the lever receiving portion 260b includes a pair of guide ribs 260c that protrude toward the left, and a cam surface 260d that faces left and is disposed between the pair of guide ribs 260c. As shown in FIG. 35, the connecting shaft 250 penetrates the left handle plate 242 and passes through the inside of the inner cylindrical portion 256a. The left end of the connecting shaft 250 penetrates the lever receiving portion 260b of the cover member 260 and protrudes to the outside of the cover member 260. The left end of the connecting shaft 250 is formed with an annular locking portion 250a. The lever member 262 is disposed to the left of the cover member 260.The lever member 262 includes an operating portion 262a operated by the user, and a shaft support portion 262b connected to the lower end of the operating portion 262a. The shaft support portion 262b includes a support pin 262c that supports the locking portion 250a of the connecting shaft 250. As shown in FIG. 33, the shaft support portion 262b of the lever member 262 is disposed between a pair of guide ribs 260c. The lever member 262 can rotate with respect to the cover member 260 in a direction defined by the pair of guide ribs 260c, with the support pin 262c as a rotation axis. The operating portion 262a is formed with an engagement portion 262d that engages with the left straight portion 210b when the lever member 262 is raised along the left straight portion 210b. 35, shaft support portion 262b has a first cam surface 262e that comes into contact with cam surface 260d of cover member 260 when lever member 262 is raised along left straight portion 210b, and a second cam surface 262f that comes into contact with cam surface 260d of cover member 260 when lever member 262 is pushed down so as to move away from left straight portion 210b. The distance from support pin 262c to first cam surface 262e is greater than the distance from support pin 262c to second cam surface 262f.

[0118] When the lever member 262 is raised along the left straight portion 210b, the first cam surface 262e of the lever member 262 abuts against the cam surface 260d of the cover member 260, and the support pin 262c pulls the left end of the connecting shaft 250 to the left. In this case, in the left handle attachment portion 240, the cover member 260 is pressed to the right by the lever member 262. As a result, the handle side cam member 258 is fixed to the main body side cam member 256 with the tooth surface 258c meshing with the tooth surface 256c. Also, in the right handle attachment portion 238 shown in FIG. 34, the cover member 248 is pressed to the left by the nut 252. As a result, the handle side cam member 246 is fixed to the main body side cam member 244 with the tooth surface 246c meshing with the tooth surface 244c. In this state, the attachment angle of the handle unit 6 to the main body unit 4 is fixed.

[0119] In the left handle attachment part 240 shown in FIG. 35, when the lever member 262 is pushed down so as to move away from the left straight portion 210b, the second cam surface 262f of the lever member 262 abuts against the cam surface 260d of the cover member 260, and the pulling of the connecting shaft 250 by the support pin 262c is released. In this case, in the left handle attachment part 240, the meshing between the tooth surface 258c and the tooth surface 256c is released, and the handle side cam member 258 becomes rotatable relative to the main body side cam member 256. In addition, in the right handle attachment part 238 shown in FIG. 34, the meshing between the tooth surface 246c and the tooth surface 244c is released, and the handle side cam member 246 becomes rotatable relative to the main body side cam member 244. In this state, the attachment angle of the handle unit 6 to the main body unit 4 can be freely adjusted. After adjusting the mounting angle of the handle unit 6 relative to the main unit 4, the mounting angle of the handle unit 6 relative to the main unit 4 is fixed again by pulling the lever member 262 along the left straight portion 210b.

[0120] (battery cover 264) As shown in FIG. 36, the body cover 108 is formed with a battery opening 108c corresponding to the battery box 198. A battery cover 264 is provided in the battery opening 108c. The battery cover 264 is supported by the body cover 108 so as to be rotatable about a rotation axis extending in the left-right direction near the front end of the battery cover 264. When the battery cover 264 is open, each of the multiple battery packs 202 can be attached to and detached from each of the multiple battery attachment parts 200 by sliding them in the up-down direction relative to each of the multiple battery attachment parts 200. When the battery cover 264 is closed, the battery cover 264 covers the entire battery opening 108c.

[0121] In the battery opening 108c, the upper end of the battery box 198 protrudes upward from the upper surface of the body cover 108. A waterproof rib 264a is formed on the inner surface of the battery cover 264. The waterproof rib 264a has a shape that surrounds the periphery of the battery box 198 when the battery cover 264 is closed. Furthermore, when the battery cover 264 is closed, the lower end of the waterproof rib 264a abuts against the upper surface of the body cover 108 at a position lower than the upper end of the battery box 198. Therefore, when the battery cover 264 is closed, a labyrinth structure is formed by the waterproof rib 264a and the battery box 198, so that it is possible to prevent water from entering the inside of the battery cover 264.

[0122] A permanent magnet 264b is attached to the center in the left-right direction of the rear end of the battery cover 264. The permanent magnet 264b is disposed in correspondence with a metal screw 108d for fixing the body cover 108 to the chassis 14. When the battery cover 264 is closed, a magnetic force acting between the permanent magnet 264b and the screw 108d acts in a direction to close the battery cover 264. This makes it possible to prevent the battery cover 264 from opening unexpectedly. In addition, as shown in FIG. 3, when the battery cover 264 is closed, gravity acting on the battery cover 264 acts in a direction to close the battery cover 264. This makes it possible to prevent the battery cover 264 from opening unexpectedly.

[0123] As shown in FIG. 37, when the cleaning device 2 is not in use and is to be stored, the handle unit 6 can be folded relative to the main unit 4, and the cleaning device 2 can be placed with the rear surface of the dust container 13 abutting against the work surface. This can reduce the space required for storing the cleaning device 2. Even when the cleaning device 2 is placed as shown in FIG. 37, gravity acts on the battery cover 264 in a direction to close the battery cover 264. This can prevent the battery cover 264 from opening unexpectedly. In addition, as shown in FIG. 37, when the handle unit 6 is folded relative to the main unit 4, the user can carry the cleaning device 2 by gripping the grip 266 formed at the front end of the chassis 14.

[0124] (Modification) In the above embodiment, the cleaning device 2 is described as having the brush motor 74 and the speed reduction mechanism 76, and the drive shaft 77 is rotated by the brush motor 74 to rotate the front main brush 20, the rear main brush 22, and the side brush 150. Alternatively, the cleaning device 2 may be configured not to have the brush motor 74 and the speed reduction mechanism 76. In this case, for example, by providing a rotation transmission mechanism (not shown) that transmits the rotation of the right rear wheel 10 and the left rear wheel 12 to the drive shaft 77, the front main brush 20, the rear main brush 22, and the side brush 150 can be rotated by utilizing the rotation of the right rear wheel 10 and the left rear wheel 12 when the user moves the cleaning device 2.

[0125] In the above embodiment, the cleaning device 2 is described as not having a drive source for rotating the right rear wheel 10 and the left rear wheel 12. Alternatively, the cleaning device 2 may have a wheel motor (not shown) for rotating the right rear wheel 10 and the left rear wheel 12. In this case, the ECU 204 may control the operation of the wheel motor by controlling the power supplied to the wheel motor from the multiple battery packs 202. In this case, the switch operation unit 212 of the handle unit 6 may be provided with a button for the user to switch the wheel motor on / off. Alternatively, in this case, the cleaning device 2 may be configured as a self-propelled cleaning device not having the handle unit 6.

[0126] In the above embodiment, the cleaning device 2 is a so-called sweeper type cleaning device that includes the front wheels 8, the right rear wheel 10, and the left rear wheel 12, and is pushed forward from the rear by a user holding the handle unit 6. The cleaning device 2 may be a scrubber, a polisher, or the like. Alternatively, the cleaning device 2 may be a dust collector, a robot vacuum cleaner, or the like that does not include the handle unit 6. Alternatively, the cleaning device 2 may be a handheld cleaning device that does not include the front wheels 8, the right rear wheel 10, and the left rear wheel 12, such as a handy cleaner, a mop, or the like.

[0127] In the above embodiment, a configuration has been described in which the rotation axis when the main brush support member 63 rotates relative to the chassis 14 is substantially coaxial with the rotation axis when the front main brush 20 rotates relative to the chassis 14, and only the rear main brush 22 moves up and down relative to the chassis 14 in response to operation of the main brush lifting lever 94. Alternatively, a configuration may be used in which the rotation axis when the main brush support member 63 rotates relative to the chassis 14 is located at a position different from the rotation axis when the front main brush 20 rotates relative to the chassis 14, and both the front main brush 20 and the rear main brush 22 move up and down relative to the chassis 14 in response to operation of the main brush lifting lever 94.

[0128] In the above embodiment, the front main brush 20, the rear main brush 22, and / or the side brush 150 may be different types of brushes than those described above.

[0129] As described above, in one or more embodiments, the cleaning device 2 includes the drive shaft 77, the side brush rotation transmission mechanism 163 (an example of a rotation transmission mechanism) that transmits the rotation of the drive shaft 77, the brush holder 154 (an example of a brush mounting member) that can rotate around a rotation axis, the clutch mechanism 155 that connects the side brush rotation transmission mechanism 163 and the brush holder 154, the side brush 150 (an example of a brush) attached to the brush holder 154, and the side brush moving mechanism 173 (an example of a brush moving mechanism) that moves the brush holder 154 between a close position close to the work surface and a separated position away from the work surface. The clutch mechanism 155 transmits the rotation from the side brush rotation transmission mechanism 163 to the brush holder 154 when the brush holder 154 is in the close position, and blocks the transmission of the rotation from the side brush rotation transmission mechanism 163 to the brush holder 154 when the brush holder 154 is in the separated position.

[0130] According to the above configuration, when the brush holder 154 is in the close position, the side brush 150 can be rotated, and when the brush holder 154 is in the separate position, the side brush 150 cannot be rotated. Whether the side brush 150 rotates or not can be switched depending on the position of the brush holder 154.

[0131] In one or more embodiments, the side brush rotation transmission mechanism 163 includes a brush pulley 156 (an example of a brush rotating member) that rotates with the rotation of the drive shaft 77. The clutch mechanism 155 includes a clutch pawl 154c provided on one of the brush pulley 156 and the brush holder 154, and a clutch rib 156f provided on the other of the brush pulley 156 and the brush holder 154.

[0132] According to the above configuration, with a simple configuration, it is possible to realize a clutch mechanism 155 that transmits rotation from the side brush rotation transmission mechanism 163 to the brush holder 154 when the brush holder 154 is in the close position, and cuts off the transmission of rotation from the side brush rotation transmission mechanism 163 to the brush holder 154 when the brush holder 154 is in the separated position.

[0133] In one or more embodiments, the side brushes 150 are removably attached to a brush holder 154 .

[0134] When the brush holder 154 is in the close position, the brush holder 154 is disposed close to the work surface, and therefore, it may be difficult to attach or detach the side brush 150 to or from the brush holder 154. According to the above configuration, the side brush 150 can be attached or detached to or from the brush holder 154 when the brush holder 154 is in the separated position, and therefore, the side brush 150 can be easily attached or detached to or from the brush holder 154. Furthermore, when the brush holder 154 is in the separated position, the clutch mechanism 155 blocks the transmission of rotation from the side brush rotation transmission mechanism 163 to the brush holder 154, and therefore, the side brush 150 can be safely attached or detached to or from the brush holder 154.

[0135] In one or more embodiments, the cleaning device 2 further includes a side brush operating unit 180 (an example of a brush operating unit) that is coupled to the side brush moving mechanism 173 and receives operations from a user regarding the movement of the side brush 150.

[0136] According to the above configuration, the user can operate the side brush operating unit 180 to move the brush holder 154 between the close position and the separated position.

[0137] In one or more embodiments, the side brush operating portion 180 may be located forward of the brush holder 154 from the user's perspective.

[0138] According to the above configuration, the user can operate the side brush operating unit 180 more easily.

[0139] In one or more embodiments, the side brush operating unit 180 includes a case 182 (an example of a support member) and a side brush lifting lever 184 (an example of an operating lever) supported by the case 182 so as to be rotatable between a proximity operating position that moves the brush holder 154 to a proximity position and a separation operating position that moves the brush holder 154 to a separation position.

[0140] According to the above configuration, a user can move the brush holder 154 between the close position and the separate position by a simple operation of rotating the side brush lifting / lowering lever 184.

[0141] In one or more embodiments, the side brush lift lever 184 includes an engagement claw 186a (an example of an engagement portion). The case 182 includes an engagement groove 182a (an example of an engaged portion) with which the engagement claw 186a can engage. When the side brush lift lever 184 is in the separated operation position, the engagement claw 186a engages with the engagement groove 182a.

[0142] According to the above configuration, when the side brush lifting lever 184 is in the away operation position and the user is not operating the side brush lifting lever 184, the side brush lifting lever 184 can be held in the away operation position, and the brush holder 154 can be held in the away position.

[0143] In one or more embodiments, the side brush lift lever 184 includes a lever body 184a and a lock-off switch 186 (an example of a switch member) that is movably held by the lever body 184a and has an engagement claw 186a. When a user operates the lock-off switch 186, the engagement of the engagement claw 186a with the engagement groove 182a is released.

[0144] According to the above-described configuration, by the user operating the lock-off switch 186, the side brush lifting / lowering lever 184 can be switched from a state in which it is held in the away operation position to a state in which it can be rotated toward the approach operation position.

[0145] In one or more embodiments, the side brush operating portion 180 further includes an adjustment bolt 190 (an example of an adjustment member) that regulates the range of movement of the side brush lift lever 184.

[0146] According to the above configuration, the range of the approach operation position realized by the side brush lifting / lowering lever 184 is restricted by the adjustment bolt 190, so that it is possible to restrict the range of the approach position of the brush holder 154. It is possible to prevent the brush holder 154 from coming closer to the work surface than necessary.

[0147] In one or more embodiments, the side brush operating unit 180 further includes a nut 194 (an example of a retaining member) supported by the case 182. The adjustment bolt 190 includes an adjustment knob 190b (an example of a head) that can be gripped by the user, and a bolt 190a (an example of a shaft) that is fixed to the adjustment knob 190b and screws into the nut 194. The side brush lifting / lowering lever 184 is provided with a stopper portion 188c that comes into contact with the bolt 190a of the adjustment bolt 190. When the user rotates the adjustment knob 190b, the bolt 190a advances or retreats relative to the case 182, changing the position at which the stopper portion 188c comes into contact with the bolt 190a.

[0148] According to the above configuration, the adjustment bolt 190 that restricts the movable range of the side brush lifting / lowering lever 184 can be realized with a simple configuration.

[0149] In one or more embodiments, when the user pushes the side brush lift lever 184 down, the brush holder 154 moves to the proximal position. When the user pushes the side brush lift lever 184 up, the brush holder 154 moves to the distal position.

[0150] According to the above configuration, the user can easily and intuitively grasp the movement of the brush holder 154 in response to the operation of the side brush lifting / lowering lever 184.

[0151] In one or more embodiments, the cleaning device 2 further includes a brush operating cable 178 connecting the side brush operating portion 180 and the side brush moving mechanism 173 .

[0152] According to the above configuration, the side brush operating part 180 can be disposed at a position separated from the side brush moving mechanism 173.

[0153] In one or more embodiments, the side brush movement mechanism 173 includes a movable shaft 158 ​​that is connected to a brush operating cable 178 and rotatably supports the brush holder 154 .

[0154] According to the above configuration, it is possible to realize the side brush moving mechanism 173 that moves the brush holder 154 between the close position and the separated position in response to the advancement and retreat of the brush operating cable 178 with a simple configuration.

[0155] In one or more embodiments, the side brush moving mechanism 173 further includes a shaft cable 172 coupled to the movable shaft 158 ​​and a cable connector 172 a connecting the brush operating cable 178 to the shaft cable 172 .

[0156] According to the above configuration, the cleaning device 2 can be assembled by connecting the brush operating cable 178 and the shaft cable 172 with the cable connector 172a in a state in which the brush holder 154, the movable shaft 158, and the shaft cable 172 are pre-assembled. This improves the ease of assembly of the cleaning device 2.

[0157] In one or more embodiments, the side brush moving mechanism 173 further includes a guide pulley 174 that guides the shaft cable 172 .

[0158] According to the above configuration, the shaft cable 172 can be moved smoothly in response to the advancement and retreat of the brush operating cable 178, and the movable shaft 158 ​​can be moved smoothly.

[0159] In one or more embodiments, the side brush movement mechanism 173 moves the brush holder 154 between the approach and away positions without changing the orientation of the brush holder 154 relative to the work surface.

[0160] If the attitude of the brush holder 154 with respect to the work surface changes when the side brush moving mechanism 173 moves the brush holder 154 from the close position to the separate position, the dirt and dust adhering to the side brush 150 attached to the brush holder 154 may be visible to the user, which may cause discomfort to the user. According to the above configuration, since the attitude of the brush holder 154 with respect to the work surface does not change when the side brush moving mechanism 173 moves the brush holder 154 from the close position to the separate position, it is possible to make the dirt and dust adhering to the side brush 150 attached to the brush holder 154 less visible to the user.

[0161] In one or more embodiments, the cleaning device 2 further includes front wheels 8, right rear wheels 10, and left rear wheels 12 (examples of wheels) and a chassis 14 supported by the front wheels 8, right rear wheels 10, and left rear wheels 12.

[0162] According to the above-mentioned configuration, in the cleaning device 2 having a working surface to be cleaned below, the work of attaching and detaching the side brush 150 to and from the brush holder 154 can be performed easily and safely.

[0163] In one or more embodiments, the cleaning device 2 further includes a handle unit 6 (an example of a handle) that extends rearwardly and upwardly from the chassis 14 and is grippable by a user.

[0164] According to the above configuration, in the cleaning device 2 which is operated by a user by gripping the handle unit 6, the side brush 150 can be easily attached to and detached from the brush holder 154. [Explanation of symbols]

[0165] 2: Cleaning device 4: Main unit 6: Handle unit 8: Front wheel 8a:wheel 8b: Support 9: Headlight 10: Right rear wheel 12: Left rear wheel 13: Dust container 13a:Aperture 13b: Partition 13c: Lower Containment Room 13d: Upper Containment Room 13e: Notch 13f: Engagement groove 13g: Latch 14: Chassis 16:Right rear wheel plate 18: Left rear wheel plate 20: Front main brush 22: Rear main brush 23: Main brush unit 24: Roll brush 24a: Brush shaft 24b: Brush hair 24c: Cylindrical groove 24d: Engagement groove 24e: Cylindrical groove 24f: Engagement groove 26: Brush cap 26a: Cap part 26b: Sliding groove 26c: Cylindrical section 26d: Engagement part 28: Roll brush 28a: Brush shaft 28b: Brush hair 28c: Cylindrical groove 28d: Engagement groove 28e: Cylindrical groove 28f: Engagement groove 30: Brush cap 30a: Cap part 30b: sliding groove 30c: Cylindrical part 30d: Engagement part 32: Right front brush attachment 34: Left front brush attachment 36: Right rear brush attachment 38: Left rear brush attachment 40: Driven shaft 40a: Cylindrical part 40b: Engagement part 42: Holder 42a: Cylindrical section 44: Driven shaft 44a: Cylindrical part 44b: Engagement part 46: Holder 48: Plunger pin 50: Holder 50a: Cylindrical part 52: Compression spring 54: Plunger pin 56: Holder 58: Compression spring 60: Right brush plate 60a: Cam piece 60b: Long hole 62: Left brush plate 63: Main brush support member 64: Link member 66: Right front opening 66a: Upper edge 66b: lower edge 68: Right rear opening 70: Left front opening 70a: upper edge 70b: lower edge 72:Left rear opening 74: Brush motor 76: Reduction mechanism 77: Drive shaft 78: Drive pulley 80: Guide pulley 81: Front main brush rotation transmission mechanism 82: Front driven pulley 83: Rear main brush rotation transmission mechanism 84: Rear driven pulley 85: Main brush rotation transmission mechanism 86: Tensioner pulley 88: Tensioner plate 88a: Rotating shaft 90: Tension spring 92: Main drive belt 94: Main brush lift lever 94a: Operating arm 94b: Grip 94c: Shutter support part 94d: Pin support 94e: Spring support 94f: Drive arm 94g : Cam protrusion 95: Main brush rotating mechanism 96: Right handle plate 96a: Positioning hole 96b: Long hole 97: Main brush operating section 98: Bolt 100: Positioning pin 102: First washer 104: Second washer 106: Compression spring 108: Body cover 108a: Lever opening 108b: Roller opening 108c: Battery opening 108d : Screw 110: Shutter member 110a: Long hole 112: Engagement shaft 114: Duct 114a: Latch receiver 114b:Inlet 114c: Filter unit mounting part 114d: Air passage 114e: Outlet 116 :Aperture 118: Sealing material 120: Filter unit 122: Fan unit 124: Filter holder 124a: Ventilation hole 124b: Inner upper filter holding portion 124c: Inner lower filter holder 124d: Inner right guide rib 124e: Inner left guide rib 124f: Outer right filter holder 124g: Outer left filter holder 124h: Motor holder 124i: Seal retainer 126: Main filter 126a: Filter body 126b : Filter frame 126c: Upper engagement part 126d: Lower engagement part 128: Sponge filter 130: Pre-filter 130a: Cloth filter 130b: Filter frame 130c: Right engaging part 130d: Left engagement part 132: Filter motor 132a: Upper output shaft 132b: Lower output shaft 138: Motor cover 140: Sealing material 142: Suction fan 144: Soundproof box 144a: Fan Containment Room 144b: First extension room 144c: 2nd expansion room 144d: First partition wall 144e: Second partition wall 146: Fan motor 146a: Output shaft 148: Plate fan 150: Side brush 150a: Brush cup 150b:Brush hair 150c: base 150d: Support part 150e: Bevel surface 150f: Engagement hole 150g:Through hole 150h: Outer engagement tube 150i: Operation piece 150j: Engagement claw 151: Side brush engagement mechanism 152: Side brush unit 153: Side brush fitting mechanism 154: Brush holder 154a: Bottom plate part 154b: Side plate part 154c: Clutch pawl 154d: Inner engagement tube 154e: Engagement hole 155: Clutch mechanism 156: Brush pulley 156a:Inner wall 156b: Exterior wall 156c: Connection part 156d: Drum section 156e: Reinforcement rib 156f: Clutch rib 158: Movable shaft 160: Brush base 160a: 1st inner wall part 160b: Second inner wall part 160c: Exterior wall 160d: Reinforcement rib 162: First guide pulley 163: Side brush rotation transmission mechanism 164: Second guide pulley 166: Intermediate pulley 168: Sub drive belt 170: Connection pin 172: Shaft cable 172a : Cable connector 173: Side brush moving mechanism 174: Guide pulley 176: Compression spring 178: Brush operation cable 178a: Outer cable 178b: Inner cable 180: Side brush operating section 182: Case 182a: Engagement groove 184: Side brush lift lever 184a: Lever body 184b: Switch support part 184c: Rotating shaft 186: Lock off switch 186a: Engagement claw 188: Cable holder 188a: Support part 188b: Guide groove 188c: Stopper part 190: Adjustment bolt 190a:Bolt 190b: Adjustment knob 192: Compression spring 194: Nut 196: Laura 198: Battery box 200: Battery mounting area 202: Battery pack 204: ECU 206: Control circuit board 208: Case 210: Handle frame 210a: Right straight section 210b: Left straight section 210c: Upper straight part 210d: Right connection part 210e: Left connection part 212: Switch operation section 214: Main power switch 214a: base 214b: knob part 214c: hollow 216: Lock off button 218: Brush rotation speed change button 220: Brush rotation speed indicator 222: Fan airflow rate switch button 224: Fan airflow indicator 226: Light button 228: Lighting indicator light 230: Dust removal button 232: Dust removal indicator light 234: Battery level display button 236: Battery level indicator 238: Right handlebar mounting part 240: Left handlebar mounting part 242: Left handle plate 244: Cam member on main body side 244a: Inner cylindrical part 244b: Cam section 244c: Tooth surface 246: Handle side cam member 246a: Handle support 246b: Outer cylindrical part 246c: Tooth surface 248: Cover member 248a: Handle support 248b: Shaft support 250: Connecting shaft 250a: Locking part 252: Nut 254: Connecting pipe 256: Cam member on main body side 256a: Inner cylindrical part 256b: Cam section 256c: Tooth surface 258: Handle side cam member 258a: Handle support 258b: Outer cylindrical part 258c: Tooth surface 260: Cover member 260a: Handle support part 260b: Lever receiving part 260c: Guide rib 260d: Cam surface 262: Lever member 262a: Operation unit 262b: Shaft support 262c: Support pin 262d: Engagement part 262e: First cam surface 262f: Second cam surface 264: Battery cover 264a:Waterproof rib 264b: Permanent magnet 266: Grip

Claims

1. 1. A cleaning device comprising: A drive shaft; a rotation transmission mechanism that transmits rotation of the drive shaft; A rotatable brush mounting member; a clutch mechanism that connects the rotation transmission mechanism and the brush attachment member; A brush attached to the brush attachment member; a brush moving mechanism for moving the brush attachment member between a close position close to a work surface and a separate position away from the work surface, the clutch mechanism transmits rotation from the rotation transmission mechanism to the brush mounting member when the brush mounting member is in the approaching position, and blocks transmission of rotation from the rotation transmission mechanism to the brush mounting member when the brush mounting member is in the separated position, the rotation transmission mechanism includes a brush rotating member that rotates in association with the rotation of the drive shaft, The clutch mechanism is a clutch pawl provided on one of the brush rotating member and the brush mounting member; a clutch rib provided on the other of the brush rotating member and the brush mounting member, A cleaning device in which movement of the brush mounting member from the distant position to the adjacent position engages the clutch pawl and the clutch rib, and movement of the brush mounting member from the adjacent position to the distant position disengages the clutch pawl and the clutch rib.

2. A cleaning device as claimed in claim 1, wherein the brush moving mechanism moves the brush mounting member between the approach position and the separated position without changing the orientation of the brush mounting member relative to the work surface.

3. 3. The cleaning device according to claim 1, wherein said brush is removably attached to said brush attachment member.

4. The cleaning device according to claim 1 , further comprising a brush operating unit connected to the brush moving mechanism and configured to receive an operation from a user regarding the movement of the brush.

5. The cleaning device according to claim 4 , wherein the brush operating portion is disposed forward of the brush attachment member when viewed from the user.

6. The brush operating unit is A support member; 6. The cleaning device according to claim 4, further comprising an operating lever supported by the support member so as to be rotatable between an approach operation position for moving the brush mounting member to the approach position and a separation operation position for moving the brush mounting member to the separation position.

7. The operating lever has an engagement portion, The support member includes an engaged portion with which the engaging portion can engage, The cleaning device according to claim 6 , wherein the engaging portion engages with the engaged portion when the operating lever is in the separated operating position.

8. The operating lever is The lever body, a switch member movably held by the lever body and having the engagement portion, The cleaning device according to claim 7 , wherein when the user operates the switch member, the engagement of the engaging portion with the engaged portion is released.

9. The cleaning device according to claim 6 , wherein the brush operating portion further comprises an adjustment member that restricts a movable range of the operating lever.

10. The brush operating portion further includes a holding member supported by the support member, The adjustment member has a head portion that can be held by the user, and a shaft portion that is fixed to the head portion and that screws into the holding member, The operating lever is provided with a stopper portion that comes into contact with the shaft portion of the adjustment member, The cleaning device according to claim 9 , wherein the user rotates the head to move the shaft forward or backward relative to the support member, thereby changing a position at which the stopper portion abuts against the shaft.

11. When the user pushes down the operating lever, the brush attachment member moves to the adjacent position, The cleaning device according to claim 6 , wherein the brush attachment member moves to the separated position when the user raises the operating lever.

12. The cleaning device according to claim 4 , further comprising a brush operating cable connecting the brush operating portion and the brush moving mechanism.

13. 13. The cleaning device of claim 12, wherein the brush moving mechanism comprises a moveable shaft connected to the brush operating cable and rotatably supporting the brush mounting member.

14. The brush moving mechanism includes: a shaft cable connected to the movable shaft; 14. The cleaning device of claim 13, further comprising a cable connector connecting said brush operating cable and said shaft cable.

15. The cleaning device of claim 14 , wherein the brush moving mechanism further comprises a guide pulley for guiding the shaft cable.

16. Wheels and The vehicle further includes a chassis supported by the wheels.

16. A cleaning device according to any one of the preceding claims.

17. 17. The cleaning device of claim 16, further comprising a handle extending rearwardly and upwardly from the chassis and graspable by a user.

Images