Cleaning device

Abstract

To provide a cleaning device capable of suppressing failure of an electric component due to wetting.SOLUTION: A cleaning device comprises a body part 11 including an electric blower for generating suction force, a tank part 12 for storing sucked liquid, a nozzle part including a suction port for sucking air and liquid, and a hose 8 for connecting the nozzle part and the body part 11. The body part 11 includes a connection part 331 for connecting with the hose 8, on one side in a horizontal direction, and a communication part for communicating the electric blower and the tank part 12, close to the connection part 331 side in the horizontal direction.SELECTED DRAWING: Figure 19

Description

[Technical Field]

[0001] The present invention relates to a cleaning device for cleaning a surface to be cleaned. [Background technology]

[0002] A cleaning device is disclosed (for example, Patent Document 1), which has an apparatus main body 2 that houses a suction unit 21 as a cleaning device that discharges liquid, and in which a downstream end 222 through which sewage flows into a sewage tank 6 is located on the side to which a suction hose 8 is connected, and an upstream end 233 that communicates with the suction port of the suction unit 21 is located on the opposite side to the side to which the suction hose 8 is connected. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-66532 Summary of the Invention [Problem to be solved by the invention]

[0004] Since the above-mentioned cleaning device is capable of sucking up liquid, measures are required to prevent the electrical components from getting wet with liquid, but there is a risk that dirty water may enter the suction unit if the device is tipped over. The present invention aims to realize a cleaning device that can prevent breakdowns in electrical components due to wetting with liquid. [Means for solving the problem]

[0005] The cleaning device of the present invention comprises a main body having an electric blower that generates suction force, a tank for storing sucked liquid, a nozzle having a suction port for sucking air and liquid, and a hose connecting the nozzle to the main body, wherein the main body has a connection part for connecting to the hose on one side in the left-right direction, and the electric blower is positioned closer to the connection part in the left-right direction. [Effects of the Invention]

[0006] According to the above configuration, it is possible to prevent breakdown of electrical components due to liquid wetting. [Brief explanation of the drawings]

[0007] [Figure 1] 1A and 1B are perspective views of the cleaning device, in which FIG. 1A is a view seen from above the front left side, and FIG. 1B is a view seen from above the rear right side. [Figure 2] 1A and 1B are perspective views of the device main body with the tank section pulled out from the main body, where FIG. 1A is a view from the front right bottom, and FIG. 1B is a view from the rear left bottom. [Figure 3] (a) is an oblique view from the upper right rear of the main body with the rear case moved rearward, and (b) is an oblique view from the upper right rear of the main body with the operating unit, circuit unit, power supply unit, and discharge flow path forming member moved rearward from the front case. [Figure 4] (a) is an oblique view from the upper right front of the main body with the rear case moved rearward, and (b) is an oblique view from the upper right front of the main body with the operating unit, circuit unit, power supply unit, and discharge flow path forming member moved rearward from the front case. [Figure 5] 1A and 1B are perspective views of the case in an exploded state, in which FIG. 1A is a view from the front lower left, and FIG. 1B is a view from the rear lower left. [Figure 6] 1 is a cross-sectional view of the device body taken along a cross section passing through the central axis of the blower unit as viewed from the right side. [Figure 7] 1A and 1B are perspective views of the power supply unit in an exploded state, where FIG. 1A is a view from the lower right rear side, and FIG. 1B is a view from the lower left front side. [Figure 8] 10A and 10B are perspective views of the suction flow path configuration member, in which FIG. 10A is a view seen from the upper left rear side, and FIG. 10B is a view seen from the upper left front side. [Figure 9] 10A and 10B are perspective views of the discharge flow path forming member in an exploded state, in which FIG. 10A is a view from the front upper right and FIG. 10B is a view from the rear lower right. [Figure 10]1(a) is a perspective view of the attached hand tool as seen from the lower left side, and FIG. 1(b) is a view of the device main body as seen from the rear, showing the attached hand tool (excluding the hose) in phantom lines. [Figure 11] 1A and 1B are perspective views of the suction tank in a disassembled state, in which FIG. 1A is a view from the upper right front side and FIG. 1B is a view from the lower right rear side. [Figure 12] (a) is a view of the upper tank body from above, and (b) is a view of the lower tank body from above. [Figure 13] (a) is a cross-sectional perspective view showing the float storage portion, (b) is a perspective view of the storage portion forming member seen from the front left bottom, and (c) is a perspective view of the storage portion forming member seen from the rear left top. [Figure 14] FIG. 3 is a cross-sectional view of a suction tank portion of the cleaning device as seen from the front. [Figure 15] FIG. 1 is a cross-sectional view of the hand tool from the left side. [Figure 16] FIG. 2 is a perspective view of the disassembled hand tool as viewed from the upper rear left. [Figure 17] FIG. 2 is a perspective view of the hand tool in an exploded state, viewed from the lower front left. [Figure 18] 1A and 1B are diagrams for explaining the center of gravity position, where (a) is a diagram seen from the rear, and (b) is a diagram seen from the left side. [Figure 19] 10A is a view of the cleaning device tilted backward as seen from the right side, and FIG. 10B is a view of the cleaning device tilted leftward as seen from the front side.

[0008] <Embodiment> 1. Overall structure The cleaning device X is a so-called wet cleaning device that can suck up dust, air, and liquid. As shown in FIG. 1, the cleaning device X includes a device main body 1, a hand tool 7, and a hose 8. The cleaning device X discharges liquid in the tank portion 75 from the discharge port 720a of the hand tool 7, sucks air and debris (hereinafter simply referred to as "liquid, etc.") together with the discharged liquid from the suction port 736a of the hand tool 7, and stores the sucked liquid (including debris) through the hose 8 in the tank portion 12 of the device main body 1. The cleaning device X can also suck liquid or the like from the surface to be cleaned using the hand tool 7 and store the sucked liquid or the like in the tank section 12 of the device main body 1 without discharging the liquid. The liquid can be, for example, water, which can reduce running costs, water containing a detergent that enhances cleaning ability, organic solvents with high cleaning ability (e.g., alcohol), electrolyzed water produced by electrolysis of water, electrolyzed water containing hypochlorous acid, etc.

[0009] Here, in order to distinguish between the tank section 12 that stores the sucked liquid and the tank section 75 that stores the discharged liquid, for convenience, the tank on the suction side will be labeled "for suction" and the tank on the discharge side will be labeled "for discharge." For convenience, the side of the device main body 1 where the suction tank unit 12 is present is referred to as the front side, and the direction perpendicular to the front-rear direction and the up-down direction is referred to as the left-right direction. When the suction tank unit 12 is viewed from the front, the right side is referred to as the right side in the left-right direction. Each part will be explained in detail below.

[0010] 2. Device body (1) Overview As shown in FIG. 2, the device main body 1 includes a main body section 11 that sucks up liquid and the like, and a suction tank section 12 that stores the sucked up liquid. 3, an electric blower, an operation switch 251, a battery, a circuit, a suction flow path, an exhaust flow path, etc. are housed inside case 21 of main body 11. Here, the electric blower is housed as blower section 23, operation switch 251 as operation section 25, the battery as power supply section 27, and the circuit as circuit section 29. The suction flow path that connects the main body side connection part 331, which connects to the hose 8, to the suction tank part 12 is composed of the front case 51 and the suction flow path forming member 33, and the discharge flow path that connects from the blower part 23 to the outside of the device is composed of the discharge flow path forming member 35. Note that, for the sake of convenience, the connection part 331 to the hose 8 is labeled "main body side" for the part that connects to the device main body 1, and the connection part to the hand tool 7 is labeled "tool side" for the part that connects to the hand tool 7. Each part will be explained below.

[0011] (2) Main body (2-1) Case The case 21 is made up of a plurality of members. As shown in Figures 2 and 3, the case 21 includes a front case 51 on the front side and a rear case 53 on the rear side. The case 21 has a suction tank storage section 47 on the front side that stores the suction tank section 12 so that it can be inserted and removed from the front, a function storage section 49 inside the rear side that stores the functional sections necessary for suctioning liquids, etc., and a handle section 43 on the upper side, and a holding section 39 on the rear surface for holding the hand tool 7. In FIG. 2, the lead lines of the suction tank housing portion 47 are indicated by arrows in order to distinguish them from the lead lines indicating the wall portions of the case 21 and the like.

[0012] (2-1-1) Front case 5, the front case 51 has a partition wall 510 that separates the suction tank housing section 47 and the function housing section 49 in the case 21, a front peripheral wall 511 that surrounds the periphery of the partition wall 510, and a front handle section 512 formed on the upper part of the front peripheral wall 511. In order to distinguish the front peripheral wall 511 and the front handle section 512 from the peripheral wall 531 and the rear handle section 532 of the rear case 53, for convenience, the front case 51 side is labeled "front" and the rear case 53 side is labeled "rear."

[0013] (2-1-1-1) Partition wall The partition wall 510 is vertical (extending in the left-right and up-down directions) and has a rectangular shape that is long in the up-down direction. The partition wall 510 has a suction section 510a for sucking liquid or the like from the hand tool 7 toward the suction tank section 12, and a discharge section 510b for discharging air from the suction tank section 12. The suction section 510a and the discharge section 510b are configured by a cylindrical section extending forward. The partition wall 510 has an extension 510c that is located above the circuit section 29 and extends rearward beyond the circuit section 29. The extension 510c is located below the joint (joint) between the front case 51 and the rear case 53, and prevents liquid that has seeped into the case 21 from the joint from flowing toward the circuit section 29. The partition wall 510 has a support portion 510f that supports the upstream end portion of the suction flow-path forming member 33 from the front side. The support portion 510f has a notched portion that corresponds to the outer peripheral surface on the front side of the suction flow-path forming member 33. This allows the upstream end portion of the suction flow-path forming member 33 to be supported in a positioned state.

[0014] The partition wall 510 has a liquid volume detection storage section 510d that stores a liquid volume detection section 31 (see (b) of Figure 3) for detecting the volume of liquid stored in the suction tank section 12, and a recess 510e to avoid interference with the connecting section 613 (see Figure 11) of the suction tank section 12. The liquid level detection housing 510d is configured as a recessed portion recessed toward the front. This allows the liquid level detection unit 31 to be closer to the suction tank unit 12, improving detection performance. The liquid level detection housing 510d is also located between the air blower 23 and the upstream end of the suction flow path, making effective use of the space in the case 21. For convenience, the liquid level detection unit 31 is named "liquid level" to distinguish it from other detection units.

[0015] (2-1-1-2) Front peripheral wall 5, the front peripheral wall 511 has an upper wall 513, a lower wall 514, a left side wall 515, and a right side wall 516, and has a rectangular frame shape when viewed from the front-to-rear direction. Note that the left side wall 515 and the right side wall 516 will be referred to as the side walls 515, 516 when there is no need to distinguish them. As shown in Figures 4(a) and 5(a), the upper wall 513 has an upper inner wall portion 513a extending forward from the upper end of the partition wall 510, an upper front wall portion 513b extending upward from the front end of the upper inner wall portion 513a, and an upper outer wall portion 513c extending rearward from the upper end of the upper front wall portion 513b. The lower wall 514 has a lower wall portion 514a extending forward from the lower end of the partition wall 510, a lower front wall portion 514b extending downward from the front end of the lower wall portion 514a, and a rib portion 514c extending downward from the lower wall portion 514a. The side walls 515, 516 have side inner wall portions 515a, 516a extending forward from the left and right ends of the partition wall 510, side front wall portions 515b, 516b extending outward to the left and right from the front ends of the side inner wall portions 515a, 516a, and side outer wall portions 515c, 516c extending rearward from the left and right outer ends of the side front wall portions 515b, 516b.

[0016] As shown in FIG. 5(a), the upper wall 513 has a guide portion 513d for inserting and removing the suction tank portion 12, and a case side lock portion 513e for locking the attached state of the suction tank portion 12. As shown in FIG. 4(a), the lower wall 514 has a guide portion 514d for inserting and removing the suction tank portion 12, and a case side lock portion 514e for locking the attached state of the suction tank portion 12. 5, the left side wall 515 has a notch 515d for the main body side connecting part 331 for connecting the hose 8. The right side wall 516 has a notch 516d for the power supply part 27.

[0017] (2-1-2) Rear case As shown in FIG. 5, the rear case 53 has a rear wall 530 , a rear peripheral wall 531 surrounding the periphery of the rear wall 530 , and a rear handle portion 532 formed on the upper part of the rear peripheral wall 531 .

[0018] (2-1-2-1) Back wall The rear wall 530 has a vertical shape (extending in the left-right and up-down directions). The rear wall 530 has a rectangular shape that is long in the up-down direction. The rear wall 530 has a terminal mounting portion 530a to which a connection terminal portion 28 (see FIG. 4(a)) for charging the battery 271 of the power supply portion 27 via a charging jack (not shown) is attached. The terminal mounting portion 530a extends in a cylindrical shape from the periphery of a terminal hole in the rear wall 530 to the front. A cap body 283 (see FIG. 1(b)) is removably provided in the terminal hole. The rear wall 530 has a support portion 530b that supports the power supply unit 27 from the rear side, and a support portion 530c that supports the main body side connecting portion 331 of the suction flow-path forming member 33. The support portions 530b and 530c have cutouts that correspond to the outer peripheral surfaces of the rear side of the power supply unit 27 and the suction flow-path forming member 33. This allows the power supply unit 27 and the suction flow-path forming member 33 to be supported in a positioned state. The rear wall 530 has a stepped protrusion 530f at the rear portion of the blower section 23, and a holding section (holding member) 39 (see (a) of Figure 3) that holds the hand tool 7 is attached in a state where it fits into the protrusion 530f from the rear side.

[0019] (2-1-2-2) Rear peripheral wall 5, the rear peripheral wall 531 has an upper wall 533, a lower wall 534, a left side wall 535, and a right side wall 536, and has a rectangular frame shape when viewed from the front-to-rear direction. Note that the left side wall 535 and the right side wall 536 will be referred to as the side walls 535, 536 when there is no need to distinguish between them. The lower wall 534 is located above the lower ends of the side walls 535, 536, and has one or more exhaust ports 534a for discharging air discharged from the blower 23 to the outside of the case 21, and a rib portion 534b extending downward. The left side wall 535 has a notch 535a for the main body side connecting part 331 to which the hose 8 is connected. The right side wall 536 has a notch 536a for the power supply part 27.

[0020] (2-1-3) Handle 3 and 4, the front handle portion 512 is provided along the left-right direction at the rear of the upper wall 513. Here, it extends upward from both the left and right ends of the upper wall 513 in an inverted "U" shape. The rear handle portion 532 is provided along the left-right direction in front of the upper wall 533. Here, it extends upward from both the left and right ends of the upper wall 533 in an inverted "U" shape. The front handle portion 512 and the rear handle portion 532 have cutouts 512 a and 532 a for the operating portion 25 . When the rear case 53 is fixed to the front case 51, the front handle portion 512 and the rear handle portion 532 form the handle portion 43 (see FIG. 2) and also form a housing portion that houses the operating portion 25.

[0021] (2-2) Blower 3, the blower 23 is located on one side in the left-right direction (here, the left side) at the upper side within the case 21. The blower 23 is covered by a blower cover 351 of the discharge flow path forming member 35. As shown in FIG. 6, the blower 23 has an electric blower 235, a casing 230 that houses the electric blower 235, and a communication part that communicates with the suction tank 12. The casing 230 has a stepped cylindrical body 231 located on the front side and a cover body 232 located on the rear side. A through-hole is formed in the front portion 231a of the cylindrical body 231, and an on-off valve 233 that opens and closes the through-hole is provided. The communication portion is formed by the through-hole 231b in the front portion 231a. The on-off valve 233 is opened when the electric blower 235 is driven, and closed when the driving of the electric blower 235 is stopped. The on-off valve 233 moves in the front-rear direction to open and close the through-hole. The cover body 232 has an outlet 232 a for discharging the air sucked by the electric blower 235 to the outside of the casing 230 . The blower section 23 is fixed to the partition wall 510 using screws or the like in a state in which the front portion 231a of the casing 230 protrudes forward from the discharge portion 510b of the partition wall 510 and the stepped portion of the cylindrical body 231 abuts against the partition wall 510. When the suction tank part 12 is attached, the front part 231 a of the casing 230 is located inside the suction tank part 12 .

[0022] (2-3) Operation section 4, the operation unit 25 has an operation switch 251 for starting operation etc., and a notification means 253 etc. on an operation board. The notification means 253 includes a notification means for notifying that the suction tank part 12 is full of water, a notification means for notifying when the operation switch 251 is operated while the suction tank part 12 is not installed in the correct position, a notification means for notifying that the battery needs to be charged, etc. The operation unit 25 is attached in a state where the operation board is fitted into the notch 512a of the front handle portion 512 and the notch 532a of the rear handle portion 532. The operation board is covered with a protective sheet 256.

[0023] (2-4) Power supply section 3, power supply unit 27 is located in the vertical center and on the other side in the left-right direction (here, the right side) within case 21. Power supply unit 27 extends in the left-right direction, and the center of gravity G2 (see FIG. 18(a)) of power supply unit 27 is located on the other side of the center in the left-right direction. The power supply unit 27 is located behind the suction flow path forming member 33, and the center of gravity G2 (see FIG. 18(b)) of the power supply unit 27 is located behind the partition wall 510. The power supply unit 27 is fixed to the partition wall 510 and the suction flow path forming member 33 using screws or the like.

[0024] 7, the power supply unit 27 includes a battery 271, a battery case 272 that accommodates the battery 271 in a removable (insertable) manner, a door 273 that opens and closes an entrance 272a of the battery case 272, a battery detection unit 274 that detects the insertion (attachment) of the battery 271 into the battery case 272, and a connection terminal 275 that electrically connects to the battery 271 in the battery case 272. Note that the battery detection unit 274 is labeled "battery" to distinguish it from other detection units.

[0025] The battery 271 has an elongated shape and a step portion 271a that narrows toward one end in the left-right direction. The step portion 271a has a connection hole 271b for connection to a connection terminal 275 of the battery case 272. The battery case 272 is composed of multiple members. Here, it has an end case body 276 located at the back side in the insertion direction of the battery 271, a bottom case body 277 located at the bottom in the insertion direction, and an top case body 278 located at the top in the insertion direction.

[0026] End case body 276 is provided with connection terminal 275, and bottom case body 277 is provided with cylindrical housing portion 277a for housing battery detection portion 274. Note that since housing portion 277a is open at the bottom, liquid is less likely to enter housing portion 277a. The lower case body 277 and the upper case body 278 have protruding portions 277c, 278c that protrude outward in the circumferential direction at the end opposite the end case body 276, and the door body 273 is supported so that it can be opened and closed by shafts 277e, 278e of the protruding portions 277c, 278c. The shafts 277e, 278e extend in the vertical direction. The door body 273 is supported at the front side and opens and closes at the rear side. This makes it difficult for liquid from the suction tank 12 to enter the battery case 272.

[0027] (2-5) Circuit section 3, circuit unit 29 is located at the upper side of case 21 and on the other side in the left-right direction (here, the right side). More specifically, circuit unit 29 is located below extension portion 510c and above power supply unit 27. Circuit unit 29 is located behind suction flow-path forming member 33. Circuit unit 29 is fixed to partition wall 510 using screws or the like while being spaced apart from (not in contact with) suction flow-path forming member 33. This makes it difficult for vibrations of the suction flow path to be transmitted to circuit unit 29.

[0028] The circuit unit 29 generates driving power from the power supplied from the battery 271 and supplies it to driving units such as the motor of the electric blower 235, the tilt detection unit 30, the liquid level detection unit 31, the battery detection unit 274, the operation unit 25, and the attachment / detachment detection unit 36. The circuit unit 29 drives each drive unit in accordance with the user's operation of the operation unit 25. When the tilt detection unit 30 detects that the tilt of the main body 11 exceeds a threshold value during use, the circuit unit 29 stops driving the electric blower 235. When the amount of liquid in the suction tank 12 exceeds a threshold value during use, the circuit unit 29 stops driving the electric blower 235. When the attachment / detachment detection unit 36 ​​detects that the suction tank 12 is attached when the operation unit 25 is operated, the circuit unit 29 drives the electric blower 235, and when the attachment / detachment detection unit 36 ​​detects that the suction tank 12 becomes detached (dismounted) during use, the circuit unit 29 stops driving the electric blower 235. When the charge of the battery 279 falls below a threshold value, the circuit unit 29 drives the notification means 253 of the operation unit 25. Note that the functions of the circuit unit 29 may be performed by the control unit. The circuit unit 29 performs the above functions by mounting a plurality of electronic components 291 on a circuit board 293. The tilt detection unit 30 can use an acceleration sensor or the like and is mounted on the circuit board 293, and the attachment / detachment detection unit 36 ​​can use a contact-type switch or the like and is provided using a boss hole in the front case 51 (see FIG. 2(a)).

[0029] (2-6) Liquid volume detector 3(b), the liquid level detection unit 31 is located in the vertical center and on one side in the horizontal direction (here, the right side) within the case 21. More specifically, the liquid level detection unit 31 is located below the blower 23 and above the portion of the L-shaped suction flow path forming member 33 that extends in the horizontal direction. 6, the liquid amount is detected by detecting the float 63 in the suction tank portion 12. More specifically, this is performed by a magnetic sensor 311 that detects the magnet (of the magnetism) in the float 63. The liquid level detection unit 31 is configured by mounting a magnetic sensor 311 on a detection board 313, and is housed in the liquid level detection housing portion 510d of the partition wall 510.

[0030] (2-7) Suction flow path forming member 3(b), suction flow path forming member 33 has an "L" shape when viewed from the rear, and is disposed across the lower and right portions (the other portion in the left-right direction) of case 21. In other words, air and the like sucked from hand tool 7 enters device main body 1 from one side in the left-right direction (the left side) at the lower portion of device main body 1, travels to the other side in the left-right direction (the right side), then travels toward the upper side, and enters tank portion 12 from suction portion 510a (see FIG. 2(a)) on the upper side (this flow path is the "suction flow path"). The suction flow path forming member 33 is fixed to the partition wall 510 and forms a suction flow path together with the partition wall 510 .

[0031] 8, the suction flow path forming member 33 has a main body side connecting part 331 that connects to the hose 8, and a suction flow path forming part 332 that connects to the main body side connecting part 331 and forms a suction flow path together with the partition wall 510. The suction flow path forming member 33 is fixed to the partition wall 510 using screws or the like. For convenience, the term "main body side" is used to distinguish it from the connecting portion (connector 83) on the hose 8 side. The main body side connection part 331 is located on the other end side in the left-right direction, that is, on the side where the blower part 23 is located and on the lower side of the case 21. The main body side connection portion 331 has a cylindrical portion 331a, a fitting portion 331b that fits into the suction port of the case 21 (the notch 515d of the front case 51 and the notch 535a of the rear case 53), a guide portion 331c that guides the connection of the hose side connector 83 of the hose 8, and a lock portion 331d that locks the connected state of the hose side connector 83. The fitting portion 331b is a groove formed on the outer periphery of the cylindrical portion 331a. The guide portion 331c is a groove formed on the inner periphery of the cylindrical portion 331a and extending along the cylindrical axis. The lock portion 331d is an elongated hole extending circumferentially from the inner end of the guide portion 331c. The hose side connector 83 of the hose 8 is pushed in from the other left-right side with the protruding locking portion 88 on the outer periphery positioned in the guide portion 331c, and then rotated in the circumferential direction with the locking portion 88 positioned at the back side of the guide portion 331c. This locks the connection with the hose 8. The suction flow path forming portion 332 has a semi-cylindrical shape with a portion missing in a cross section perpendicular to the cylindrical axis. The suction flow path forming portion 332 has a flat portion 332a at the open end, which improves the sealing performance.

[0032] (2-8) Discharge flow path forming member 3, the discharge flow path forming member 35 is "L" shaped and is disposed across the left part (one side in the left-right direction) and lower part of the case 21. In other words, the air in the suction tank part 12 enters the device main body 1 from the casing 230 of the blower part 23 on one side in the left-right direction (left side) at the top of the device main body 1, travels downward, then travels toward the other side in the left-right direction (right side), and exits to the outside from the discharge port 534a of the case 21 (rear case 53) (this flow path is the "discharge flow path"). The discharge flow path forming member 35 is fixed to the partition wall 510 using screws or the like. The discharge flow path forming member 35 is provided so as to be separated from (not in contact with) the suction flow path forming member 33. This makes it possible to suppress vibration and noise. The discharge flow path forming member 35 is provided so as to be separated from (not in contact with) the power supply unit 27. This makes it possible to suppress transmission of vibration of the discharge flow path forming member 35 to the power supply unit 27.

[0033] As shown in FIG. 9, the discharge flow path forming member 35 has a blower cover part 351 that covers the rear side of the blower part 23, and a discharge flow path forming part 353 that forms a flow path from the blower cover part 351 to the discharge port 534a. The discharge flow path forming portion 353 is L-shaped and includes a pre-flow path forming body 355 located on the front side and a post-flow path forming body 357 located on the rear side.

[0034] The airflow cover portion 351 is configured by an airflow cover body. The airflow cover body may also be referred to as "351." The air blower cover body 351 has a main body portion 351a which is cylindrical with a bottom and opens at the front, a through hole 351b formed in the rear wall of the main body portion 351a, a cylindrical portion 351c which extends cylindrically rearward from the periphery of the through hole 351b, a through hole 351d formed in the lower wall of the peripheral wall of the main body portion 351a, and a fitting portion 351e formed around the through hole 351d. Through-hole 351b in the rear wall is for leading out the wiring of blower 23 (electric blower 235), and the wiring is arranged in notch 351f in tubular portion 351c. The cylindrical portion 351c is fitted into a rib 530g on the rear wall 530 of the rear case 53 shown in Fig. 5(a), thereby improving the sealing performance of the blower 23 and the exhaust flow path. The through-hole 351d allows the blower cover body 351 and the discharge flow path forming portion 353 to communicate with each other. The fitting portion 351e is U-shaped with an open rear side, and has a groove-like cross section.

[0035] The flow path front forming body 355 has a front main body portion 355a which has a U-shaped cross section perpendicular to the L-shaped central axis and which opens to the rear, a fitting portion 355b formed at the upper end of the front main body portion 352a and which fits into the fitting portion 351e of the air blower cover body 351, an exhaust through hole 355c formed at the end of the exhaust flow path opposite the air blower cover body 351, and a front hood portion 355d extending downward from around the through hole 355c. The fitting portion 355b has a ridge that protrudes outward, and is inserted into the groove-shaped fitting portion 351e of the blower cover body 352 from the rear side. The pre-flow path forming body 355 has an extension portion 355e extending forward below the fitting portion 355b. The extension portion 355e approaches or abuts against the battery case 272 of the power supply unit 27 from the left and right. This allows the extension portion 355e to bear part of the load when the battery 271 is inserted into the battery case 272. The pre-flow path forming body 355 has a receiving portion 355f extending in the front-rear and left-right directions below the fitting portion 355b, which prevents moisture accumulated inside the blower cover body 351 due to condensation or the like from flowing toward the connection terminal 275 of the power supply unit 27 (the battery 271).

[0036] The flow path rear forming body 357 has a rear main body portion 357a which has a U-shaped cross section that is open to the front and is perpendicular to the L-shaped central axis, a lid portion 357b formed at the upper end of the rear main body portion 357a and covering the rear side of the fitting portion 351e of the air blower cover body 351, and a rear hood portion 357c which extends downward to match the front hood portion 355d.

[0037] The pre-channel formation body 355 and the post-channel formation body 357 are joined together by engaging the engaging portions 355g and 357d. The front hood portion 355d and the rear hood portion 357c extend to the vicinity of the bottom wall 534 of the rear case 53. As a result, most of the air flowing out from the through-hole 355c of the discharge flow path forming portion 353 is guided to the discharge port 534a of the rear case 53.

[0038] (2-9) Holding part 10, the holding portion 39 holds the hand tool 7. The holding portion 39 is provided on one side in the left-right direction at the upper part of the rear surface of the case 21. As shown in FIG. 3(a), the holding portion 39 has a base portion 391 and holding portions 393 and 395 that are provided on the base portion 391 and that hold the hand tool 7. The base portion 391 has a low box shape and fits from the rear side onto a protruding portion 530f (see FIG. 5(b)) of the rear case 53. The rear case 53 has the protruding portion 530f to ensure a storage space for the blower 23, and the retaining portion 39 is provided using the protruding portion 530f, improving the design.

[0039] 10, the holding part 39 is composed of an engaging part 393 that engages with the held part (engaging part) 734a of the hand tool 7, and a holding part (position restricting part) 395 that holds (restricts the position) the discharge tank part 75 from the left and right. The symbol "393" is also used for the engaging part. The engaging portion 393 is configured by a recessed portion of a convex portion protruding rearward from the base portion 391. The held portion (engaging portion) 734a of the hand tool 7 fits (enters) into the engaging portion 393 from above. Note that the engaging relationship between the engaging portion 393 and the held portion (engaging portion) 734a of the hand tool 7 may be reversed in terms of the convex and concave portions.

[0040] The holding portion 395 is composed of protruding portions 395a and 395b that protrude from the base portion 391 to both the left and right sides of the discharge tank portion 75. Here, the holding portion 395 has a "U" shape when viewed from the top and bottom. As shown in FIG. 10(b), the protruding portion 395b is located between the operating portion 716 of the tool main body 71 and the discharge tank portion 75. This prevents the operating portion 716 from being operated while the hand tool 7 is held in the device main body 1, preventing the operating portion 716 from interfering with something and causing a malfunction. The protruding portion 395b is located between the operating portion 716 and the discharge tank portion 75, and functions as a partition that separates the operating portion 716 from the discharge tank portion 75. Therefore, the holding portion 395 has the partition portion (395b) as a part of the holding portion 395.

[0041] (3) Suction tank As shown in FIG. 2, the suction tank portion 12 has at least a suction tank 60 for storing the liquid sucked by the main body portion 11, an inlet 60a for the inflow of the sucked liquid, etc., and an outlet 60b for discharging air from the suction tank 60. When the suction tank 60 is attached to the main body 11, the suction part 510a of the main body 11 enters the inlet 60a, and the cylindrical body 231 of the blower 23 enters the outlet 60b. The suction tank 60 has a box shape that is long in the vertical and horizontal directions, and includes an upper tank 61 and a lower tank 62. The sucked liquid is mainly stored in the lower tank 62, which forms the storage section of the suction tank 60. The inlet 60a and the outlet 60b are provided at a distance from each other on the left and right sides on the rear surface of the upper tank 61. This allows the amount of liquid that can be stored to be increased. The suction tank section 12 (lower tank 62) includes a float 63 (see FIG. 14) for detecting the liquid level of the suction tank 60 in a float accommodating section 65 so that the float 63 can move up and down.

[0042] As shown in Figure 11, the suction tank 60 has tank-side locking sections 612, 622 on the upper tank 61 and the lower tank 62 that lock the tank in the attached state when attached to the device main body 1. The tank-side locking sections 612, 622 are supported so as to be movable in the vertical direction and are biased outward in the vertical direction. When the suction tank 60 is attached, the convex portions of the tank-side locking sections 612, 622 engage with the concave portions of the case-side locking sections 513e, 514e of the case 21 (see Figures 4(a) and 5(a)). 11, the suction tank 60 has connecting portions 613, 623 on the upper tank 61 and the lower tank 62 that connect the upper tank 61 and the lower tank 62 in a separable manner. Here, the connecting portion (engaging portion) 613 of the upper tank 61 rotates around a rotation axis in the left-right direction and engages with the connecting portion (engaging portion) 623 of the lower tank 62. Note that the engaging relationship may be upside down.

[0043] The upper tank 61 includes an upper tank body 610 and an upper front cover 611. The lower tank 62 includes a lower tank body 620 and a lower front cover 621. The upper front cover 611 and the lower front cover 621 have notches 611a, 611b, 621a and through-holes 621b for tank side locking parts 612, 622 and connecting parts 613, 623. The upper front cover 611 is attached to the upper tank body 610 and the lower front cover 621 is attached to the lower tank body 620 by engagement portions 614, 615, 624, and 625.

[0044] 11(b), the upper tank body 610 has multiple upper partition plates 616 that extend in the up-down and front-rear directions and are alternately arranged at intervals in the left-right direction. The upper partition plates 616 are located between the inlet 60a and the outlet 60b in the left-right direction. As shown in (a) of Figure 12, two upper partition plate portions 616a extend from the front wall of the upper tank body 610 to just before the rear wall, and one upper partition plate portion 616b extends from the rear wall between the two upper partition plate portions 616a to just before the front wall. This prevents the liquid that has flowed in through the inlet 60a from entering the blower 23 through the outlet 60b. Also, the air flows smoothly inside the suction tank 60, reducing the load on the electric blower 235. The upper partition plate portion 616 is provided so that its main surface is perpendicular to the direction (left-right direction) connecting the inlet 60a and the outlet 60b, thereby preventing splashes of liquid flowing in from the inlet 60a from reaching the inlet 60a side.

[0045] 11(a), the lower tank body 620 has a plurality of lower partition plate portions 626 that extend in the up-down and front-rear directions and are spaced apart in the left-right direction, and has a filter 64 between the left and right lower partition plate portions 626. The lower partition plate portions 626 are located between the inlet 60a and the outlet 60b in the left-right direction. As shown in Figure 12(b), two lower partition plates 626 extend from the front wall of the lower tank body 620 to just before the rear wall. The lower partition plates 626 and the filter 64 are arranged so that their main surfaces are perpendicular to the direction (left-right direction) connecting the inlet 60a and the outlet 60b. This reduces fluctuations in the liquid level.

[0046] The filter 64 is provided on the upstream side (the inlet 60a side) of the float housing portion 65. This makes it possible to prevent dust from flowing into the float housing portion 65. The filter 64 is disposed downstream of the inlet 60a so that the liquid that has flowed into the suction tank 60 passes through it. As a result, when the liquid that has flowed in from the inlet 60a flows downstream, it passes through the filter 64. As shown in FIG. 13(a), the filter 64 is provided over an area from the bottom of the suction tank 60 (the bottom of the lower tank body 620) to above the highest level of the stored liquid. This allows most of the liquid stored downstream of the filter 64 to pass through the filter 64. Therefore, the liquid that moves the float 63 up and down contains little debris, allowing the float 63 to move up and down smoothly. The filter 64 divides the interior of the suction tank 60 into an area that stores liquid with a high debris content and an area that stores liquid with a low debris content. In other words, the filter 64 divides the downstream side of the inlet 60a from the upstream side of the float accommodating section 65.

[0047] 13(a), the filter 64 is held by a holding portion 627. The holding portion 627 has a front holding portion 627a extending from the front wall toward the rear wall, and a rear holding portion 627b provided on the rear wall. The front holding portion 627a has a plate portion 627c that extends in the vertical and front-to-rear directions, and a groove portion 627d provided at the rear end of the plate portion 627c. The rear holding portion 627b is configured with a groove portion (reference numeral 627b will be used). The groove portions 627d and 627b extend in the vertical direction. This allows the filter 64 to be inserted and removed in the vertical direction and to be detachably attached. This makes it easy to clean the filter 64. 14, the upper partition plate portion 616 of the upper tank 61, the lower partition plate portion 626 of the lower tank 62, and the filter 64 are close to each other in the vertical direction. This prevents the filter 64 from slipping out to the upper side without the need for a dedicated fixing portion for fixing the filter 64 in the vertical direction.

[0048] 12(b), the lower tank 62 (lower tank main body 620) includes a storage portion forming member 66 that, together with the lower tank main body 620, forms a float storage portion 65. The float 63 is disposed on the opposite side of the inlet 60a in the left-right direction. More specifically, the float 63 is disposed below the outlet 60b. As a result, the inlet 60a and the float 63 are located at both ends of the liquid storage flow path, and the filter 64 can be positioned with greater freedom.

[0049] As shown in Figure 13, the float accommodating section 65 is composed of the rear wall, left wall, bottom wall of the lower tank main body 620, an extension plate portion 628 extending forward from the rear wall in an up-down direction, a front opposing portion 661 in the accommodating section forming member 66 that faces the rear wall of the lower tank main body 620, and an upper opposing portion 662 in the accommodating section forming member 66 that extends rearward from the upper end of the front opposing portion 661 and faces the bottom, and has a rectangular shape that is long in the up-down direction. The storage portion forming member 66 has at least a base portion 663 , a front opposing portion (standing plate portion) 661 standing upright from the rear end of the base portion 663 , and an upper opposing portion 662 . 14, the base portion 663 has a through-hole 663a, and is fixed to the bottom wall of the lower tank body 620 by a screw 69 that passes through the through-hole 663a. The storage portion forming member 66 can be removed using a screwdriver or the like, making it easy to clean the float 63, storage portion forming member 66, and float storage portion 65. The storage portion forming member 66 has a rib portion 664 that straddles the front facing portion 661 and the base portion 663. This reinforces the storage portion forming member 66. The container-forming member 66 has a through groove 661a extending in the up-down direction in the front facing portion 661. This allows liquid to flow into the float container 65. The storage section forming member 66 has an abutting portion 665 that abuts against the extension plate portion 628 of the lower tank body 620, a fitting portion 666 that fits into the upper end of the extension plate portion 628, and a fitting portion 667 that is inserted into and fits into the groove portion 629 in the left wall of the lower tank body 620. This positions the storage section forming member 66.

[0050] The float 63 includes a case 630 and a magnet 635 (see FIG. 6) that is a detection source housed in the case 630. The float 63 is an object to be detected by the liquid level detection unit 31. The case 630 has a rectangular parallelepiped (box-like) shape and has one or more protrusions 631 on its outer circumferential surface. The protrusion 631 is provided on at least one of the bottom surface or top surface of the case 630. The protrusion 631 is provided on at least one of the right and / or left surface. The protrusion 631 is provided on at least one of the front and rear surfaces. This prevents the float 63 from coming into close contact with the surface that constitutes the float accommodating portion 65 and becoming unable to move up and down. It is preferable that there are two or more protrusions 631 on each surface, spaced apart in the vertical direction. If the surface is large, it is preferable that there are three or more protrusions. It is preferable that the tip is hemispherical. The protrusions 631 are provided in each of the sections obtained by dividing the surface into two or four equal parts, so that the number of protrusions can be selected appropriately depending on the size of the surface.

[0051] 3. Hand Tools 15, the hand tool 7 includes a tool main body 71 and a discharge tank 75. The discharge tank 75 is configured to be detachable from the tool main body 71. By operating the operating section 716 of the tool main body 71, the hand tool 7 discharges the liquid in the discharge tank 75 and sucks in the discharged liquid and air containing dust and the like by suction through the hose 8. Here, in describing the hand tool 7, the direction perpendicular to the vertical direction and in which the liquid is ejected may be referred to as the front-to-back direction, the ejecting side may be referred to as the front side, and the direction perpendicular to the vertical and front-to-back directions may be referred to as the width direction. When the hand tool 7 is attached to the device body 1, the front-to-back direction of the hand tool 7 coincides with the left-to-right direction of the device body 1, and the width direction of the hand tool 7 coincides with the front-to-back direction of the device body 1.

[0052] (1) Tool body As shown in FIG. 15, the tool main body 71 includes a nozzle portion 700 having a suction port 736a communicating with the device main body 1 (main body 11) and a discharge port 720a for discharging liquid, a handle portion 739 provided on the nozzle portion 700, and an operation portion 716 that accepts operations to discharge the liquid in the discharge tank portion 75 from the discharge port 720a. Here, the surface with the suction port 736a is the cleaning surface, and when the hand tool 7 is used, the cleaning surface is placed opposite the surface to be cleaned. The nozzle portion 700 is located on the front side (one side) in the front-rear direction (first direction), and the handle portion 739 is located on the front side (one side) in the front-rear direction (first direction). As shown in FIGS. 16 and 17, the tool main body 71 has a base body 710 and a cover body 730.

[0053] (1-1) Base body 16, the base body 710 has a base plate portion 712 and an erect plate portion 713 erected from the front portion of the base plate portion 712. A discharge portion 714 is attached to the base plate portion 712, and a brush portion 725 is attached to the erect plate portion 713. Discharge portion 714 can be either electrically operated or manually operated, and is a so-called trigger sprayer in this example. Discharge portion 714 has a pump portion 715, an operating portion 716, and a discharge nozzle portion 717. Discharge portion 714 in this example has a spray nozzle portion 720 for atomizing the liquid discharged from discharge nozzle portion 717. As shown in FIG. 15, in the pump section 715 , a plunger 719 in a staging 718 is moved by operation of an operating section 716 , and the liquid in the staging 718 is pushed out to a discharge nozzle section 717 . Spray nozzle part 720 is a cylindrical shape with a bottom that is supported movably in the discharge direction relative to discharge nozzle part 717, and has a conical discharge outlet 720a at the bottom that narrows toward the outside. A groove is formed at the tip of discharge nozzle part 717 to impart rotational force to the discharged liquid, and when discharge outlet 720a (spray nozzle part 720) is brought close to the tip of discharge nozzle part 717, the liquid is discharged in mist form, and when discharge outlet 720a is moved away from the tip, the liquid is discharged in liquid form. Note that spray nozzle part 720 is screwed onto the outer periphery of discharge nozzle part 717, and when it rotates, discharge outlet 720a moves closer to or closer to discharge nozzle part 717. The operation unit 716 is provided so as to face the discharging tank unit 75. The operation unit 716 is located between the handle unit 739 and the discharging tank unit 75. The operation unit 716 is inclined downward toward the rear, and is supported by the base body 710 at its middle portion so as to be rotatable (see FIG. 16). The operation unit 716 also serves as a receiving unit that receives operations for discharging the liquid in the discharging tank unit 75. The liquid in the discharge tank portion 75 is supplied via a tube 721. A weight 722 with a through hole is attached to the lower end of the tube 721.

[0054] (1-2) Cover body As shown in FIG. 15, the cover body 730 is connected to the hose 8 and has a suction flow path 736 inside. 17, the cover body 730 includes a cover main body 731 that covers the discharge portion 714 and other components attached to the base body 710, an outer cover body 732 that covers an upper wall portion 731a (see FIG. 15) on the front side of the cover main body 731, an inner upper cover body 733 that is within the cover main body 731 and covers the discharge portion 714, an inner right cover body 734 that is provided on the inside of the right wall portion 731b of the cover main body 731, and an inner left cover body 735 that is provided on the inside of the left wall portion 731c of the cover main body 731. The cover main body 731 and the base body 710 together form a housing or casing that houses the discharge portion 714.

[0055] 17, cover main body 731 has an attachment part 738 to which base body 710 is attached, and a handle part 739 that is gripped by a user during use. Note that attachment part 738 is located in the front part of cover main body 731, and handle part 739 is located in the rear part of cover main body 731. The mounting portion 738 has an upper wall portion 731a and a pair of side wall portions 731b, 731c, and the base body 710 is attached by screws or the like to an inner right cover body 734 and an inner left cover body 735 provided on the pair of side wall portions 731b, 731c.

[0056] As shown in Fig. 15, handle portion 739 is cylindrical and is connected to the lower end of upper wall portion 731a of mounting portion 738 with opening 739b at its upper end exposed. This allows the interior of handle portion 739 to communicate with the space formed between upper wall portion 731a and outer cover body 732, forming suction flow path 736 and a suction portion. Note that suction port 736a is provided in front wall portion 732a of outer cover body 732, as shown in Fig. 17. The cylindrical axis of the handle portion 739 is inclined downward toward the rear, and the handle portion 739 is located behind the operating portion 716. This allows the user to easily operate the operating portion 716 while gripping the handle portion 739. In particular, when the surface to be cleaned on which suction port 736a is located is held horizontal, imaginary line A parallel to the cylindrical axis of handle portion 739 extends at an acute angle C with respect to the horizontal (imaginary line B in FIG. 15). Angle C is preferably within the range of 20 to 50 degrees. This improves operability when cleaning a horizontal surface to be cleaned. The operating unit 716 is located behind the discharge tank unit 75, and the gap between the operating unit 716 and the discharge tank unit 75 is configured so that the user can operate the operating unit 716 while holding the handle unit 739.

[0057] The handle portion 739 has a protruding portion 739a that protrudes on the side opposite to the operating portion 716. This improves operability when a user grips the handle portion 739 and presses the hand tool 7 against the surface to be cleaned or moves the hand tool 7 along the surface to be cleaned. The protruding portion 739a is configured as a finger grip that protrudes in a direction intersecting the extension direction of the cylindrical axis of the handle portion 739. Here, the protruding portion 739a has a portion that extends in a direction perpendicular to the cylindrical axis. 15, an imaginary line D that is perpendicular to the direction (imaginary line A) parallel to the cylindrical axis of the handle portion 739 and passes through the protruding portion (finger hook portion) 739a intersects with the operating portion 716. This makes it easy to hook the thumb on the finger hook portion.

[0058] 17, the handle portion 739 has a tool side connecting portion 741 at its lower end for connecting to the hose 8. The tool side connecting portion 741 has an L-shaped groove-like guide portion 741a for guiding the locking portion 88 of the connector 85 of the hose 8 into its interior, and a through-hole-like locking portion 741b for preventing the connector 85 from coming loose. The guide portion 741a is formed along the axial direction of the handle portion 739, and the locking portion 741b is formed along the circumferential direction.

[0059] The brush part 725 includes a base part 725a and a brush 725b provided on the base part 725a. The brush part 725 is disposed below the outlet 720a of the outlet part 714.

[0060] The inner right cover body 734 has a held portion 734a for attaching (holding) the hand tool 7 to the device body 1. Here, the nozzle portion 700 is held so that the discharge port 720a faces the front side (the other side in the left-right direction of the device body 1). As shown in Figure 10(a), the held portion 734a is configured by an engaging portion that is inserted from above into and engages with a recessed portion of the holding portion 393 of the device body 1. The held portion 734a of the hand tool 7 and the holding portion 393 of the device body 1 are configured so that, when the hand tool 7 is held, the right wall portion 731b of the cover body 730 abuts against the base portion 391 of the holding portion 39 of the device body 1 (see FIG. 10(a)). This stabilizes the attached (held) state of the hand tool 7.

[0061] (2) Discharge tank section As shown in FIG. 16, the discharge tank portion 75 has a tank portion 751 and an attachment portion 753 for attaching the tank portion 751 to the base body 710. 15, the front end of the discharge tank portion 75 is located flush with or behind the front surface (cleaning surface) of the nozzle portion 700. The front end corresponds to a surface including the front edge of the cover body 730. As a result, when the cleaning surface is placed opposite the surface to be cleaned during use, the discharge tank part 75 is positioned on the opposite side of the surface to be cleaned, preventing the discharge tank part 75 from interfering with the cleaning work. The tank portion 751 integrally includes an upper portion 751a located on the mounting portion 753 side and a lower portion 751b located below the upper portion 751a. 15, the upper portion 751a has a cylindrical shape that extends in the vertical direction, and a space exists between the upper portion 751a and the operating portion 716. The lower end of the upper portion 751a is located at approximately the same position as the lower end of the operating portion 716 or lower than the lower end of the operating portion 716. This prevents the discharge tank portion 75 from getting in the way when operating the operating portion 716. The lower portion 751b bulges out toward the rear (handle portion 739) as it moves downward from the upper portion 751a. This allows the discharge tank portion 75 to be enlarged without impairing operability for the user. The upper rear portion of the lower portion 751b is formed so as to ensure an operating space between it and the operating portion 716. That is, when viewed from the side (width direction) (as in FIG. 15), nozzle portion 700 is located at the front in the front-to-rear direction, handle portion 739 is located at the rear in the front-to-rear direction, and the distance between handle portion 739 and discharge tank portion 75 increases as it moves toward the rear. As a result, when the cylindrical axis of hose 8 is connected so that it is on an extension of the cylindrical axis of handle portion 739, the space at the connection with hose 8 becomes larger, making it easier to remove hose 8. Since the lower end of the handle portion 379 (cover main body 731) is located above the lower end of the discharge tank portion 75, it is possible to reduce interference with the discharge tank portion 75 when removing the hose 8.

[0062] As shown in Fig. 17, the lower portion 751b has a bottom 751c with a flat surface that rests on a placement surface when placing the hand tool 7. This allows the hand tool 7 to be placed alone, improving convenience. In particular, the rear side of the lower portion 751b, where the handle portion 739 is located, is wider than the front side, improving stability. The bottom 751c has a recessed center, but the periphery forms a flat surface that abuts against the placement surface. When the bottom (flat surface) 751c of the discharge tank portion 75 is placed on a horizontal surface, the discharge portion 714 of the nozzle portion 700 and the discharge tank portion 75 are aligned vertically, and the handle portion 739 and the discharge tank portion 75 are aligned horizontally.

[0063] The attachment portion 753 is attached to the attachment portion 712a of the base plate portion 712. The attachment is performed by engaging a groove portion of the attachment portion 753 of the discharge tank portion 75 with a convex portion of the attachment portion 712a of the base body 710.

[0064] 4. Hose 1, the hose 8 includes a hose body 81 and hose side connectors 83, 85 provided on both ends of the hose body 81. For convenience, the term "hose side" is added to distinguish it from the connecting portion on the other side to which the hose 8 is connected. The hose side connector 83 is removably attached to the main body side connector 331 of the suction flow path forming member 33 of the device main body 1, and the hose side connector 85 is removably attached to the tool side connector 741 of the hand tool 7. 16, the hose side connectors 83, 85 have a connecting portion 86 connected to the hose body 81, a fitting portion 87 that fits into the mating connecting portion 331, 741, and a locking portion 88 provided on the fitting portion 87. The locking portion 88 is formed of a protrusion, and moves through the guide portions 331c, 741a and locking portions 331d, 741b of the mating connecting portion 337, 741.

[0065] 5. Center of gravity position As shown in Figure 18, when the cleaning device X is in a state where no liquid is stored in the discharge tank portion 75 and the suction tank portion 12 and the hand tool 7 is being held, the center of gravity G0 of the entire device is located in the center in the up-down, front-rear, and left-right directions. The handle portion 43 is located approximately above or near the center of gravity G0, making it easy to carry. When liquid is stored in the device, the center of gravity G0 moves downward. This allows the device to be placed stably on a support surface. Even when no liquid is stored in the suction tank 12 and the hand tool 7 is not being held (i.e., when the user is holding the hand tool 7), the center of gravity G0 of the entire device is located in the center in the up-down, front-rear, and left-right directions. The handle 43 is located approximately above or near the center of gravity G0, making it easy to carry. The center of gravity G1 of blower unit 23 is located on one side (right side) in the left-right direction and above the center in the front-to-rear direction. The center of gravity G2 of power supply unit 27 is located on the other side (left) in the left-right direction and below the center in the up-down direction on the rear side. As a result, the centers of gravity of blower unit 23 and power supply unit 27 are spaced apart in the left-to-right direction, so the center of gravity G0 of the entire unit is located near the center in the left-to-right direction.

[0066] The center of gravity G3 of the discharge tank portion 75 is located at the center of the tank. When the discharge tank portion 75 is attached but no liquid is stored, the center of gravity G4 of the hand tool 7 is located above the discharge tank portion 75 and at the front side of the hand tool 7 in the front-to-rear direction (left-to-right direction in the device main body 1). The engaging portion 393 of the holding portion 39 of the main body 11 engages with the vicinity of the center of gravity G4 of the hand tool 7, allowing the hand tool 7 to be held in a stable state. When liquid is stored in the discharge tank portion 75, the center of gravity G4 of the entire device moves forward and approaches the engaging portion 393 of the holding portion 39. Furthermore, the center of gravity G4 of the hand tool 7 is located above the center of gravity G3 of the discharge tank portion 75 in the front-to-back and left-to-right directions. Therefore, even if liquid accumulates in the discharge tank portion 75 and the center of gravity G3 of the discharge tank portion 75 moves downward, the weight balance does not change significantly, and a downward load acts on the engaging portion 393 of the main body portion 11, making it possible to hold the hand tool 7 in place without it coming off.

[0067] 6.Use The cleaning device X holds the hand tool 7 at the rear of the device main body 1 with the holding portion 39. In this state, the bottom surface of the discharge tank portion 75 of the hand tool 7 faces the placement surface with a gap between them. Therefore, as shown in FIG. 19(a), when the cleaning device X or the main body 11 tilts rearward with the left-right direction as the rotation axis, the discharge tank portion 75 of the hand tool 7 and the hose 8 (not shown) come into contact with the placement surface, making it less likely to tip over. In particular, since the device main body 1 has the suction tank section 12 arranged at the front, if it were to tip backwards, there is a risk that the liquid in the suction tank section 12 would flow toward the air blower section 23, power supply section 27, and circuit section 29, so a structure that makes it difficult for the device to tip backwards is particularly preferable. The cleaning device X is connected to the hose 8 on the other side (left side) in the left-right direction at the lower side of the main body 11. Therefore, as shown in (b) of Figure 19, when the cleaning device X or the main body 11 tilts to the left with the front-to-rear direction as the rotation axis, the hose 8 and the connection part come into contact with the placement surface, making it difficult for the cleaning device X to tip over.

[0068] 7.Liquid The liquid to be discharged is preferably one that can remove dirt such as oil and that quickly reduces the size of bubbles (volume) in the suction tank portion 12 after suction. The following describes detergents suitable as liquids used in the cleaning device (rinser cleaner) 1. The liquids are liquid agents diluted with water.

[0069] (1) Antifoaming test The outline of the antifoaming test is as follows. ·Device used·· Diaphragm pump DSA-2F-12W manufactured by Denso Sangyo Co., Ltd. ··· Graduated cylinders 100mL, 500mL Tube diameter 3mm Discharge nozzle diameter: 0.5mm Testing Method (a) Prepare a cleaning solution by diluting the liquid agent 100 times. (b) Wet 100 mL and 500 mL measuring cylinders with pure water. (c) Prepare 30 mL of cleaning solution in a 100 mL graduated cylinder. (d) The cleaning solution is continuously dripped into a 500 mL graduated cylinder from a height of 38.2 cm at a rate of 250 mL / min. ·evaluation The evaluation is based on the volume of foam generated after dropping. The results are shown in Table 1. [Table 1] From Table 1, we can see that the volume of detergents A and B immediately after addition (0 seconds) was 45 mL, less than 50 mL, and the amount of foam generated (initial foaming) was suppressed. Detergent A's volume decreased to half of its initial volume after about 3 seconds, to one-third after about 4 seconds, and to one-quarter after about 8 seconds. The volume of detergent B decreased to half of the volume immediately after dropping after 8 seconds, to one-third after about 16 seconds, and to one-quarter after 21 seconds. Thus, compared to synthetic dishwashing detergents, detergents A and B produce less initial foam (foam suppression) and break bubbles quickly, so that the amount of foam in suction tank 12 can be suppressed.

[0070] (2) Cleanability The outline of the cleaning test is as follows: Test subject: Sangetsu Corporation tile carpet NT-367 (50 x 50 cm polypropylene) Equipment: Iris Ohyama Rinser Cleaner RNS-300 Testing Method (a) Drop 1 mL of the dirt onto a 10 x 10 cm area of ​​the carpet tile. (b) Wipe off excess dirt with Kimtowel (manufactured by Nippon Paper Crecia Co., Ltd.) and leave to stand for 5 minutes. (c) Add 5 mL of detergent, scrub 20 times with the brush included with the rinser cleaner, and then suck up with the rinser cleaner. (d) The operation from dropping the detergent to suctioning (the above (c)) is repeated until the dirt is removed, and the number of times this is repeated is counted as the number of cleanings. The results are shown in Table 2. [Table 2] From Table 2, it can be seen that Detergent A and Sample A have high cleaning ability against oil stains from chili oil and meat sauce. From this point of view, Detergent A has excellent cleaning and defoaming properties.

[0071] (3) Emulsification and dispersibility test The outline of the emulsification and dispersibility test is as follows: Equipment used: Shaker (Shaker SA300, manufactured by Yamato Scientific Co., Ltd.) Chili oil Produced by S&B Foods Co., Ltd. Testing Method (a) Add 20 mL of pure water and 0.5 mL of chili oil to a screw-cap test tube and stir. (b) Add 0.5 mL of liquid (detergent) and place the screw-cap test tube on its side on a shaker. (c) Shake at 300 rpm for 90 seconds. (d) Evaluate immediately after shaking, 60 seconds later. ·evaluation × Complete separation has occurred △ ··· Separation is progressing 〇 Almost completely separated ◎ Completely decentralized The results are shown in Table 3. [Table 3] From Table 3, it can be seen that detergent A has emulsifying and dispersing properties equivalent to those of synthetic dishwashing detergents.

[0072] (4) Summary For the above reasons, from the viewpoint of defoaming properties, detergents A and B are preferable as detergents to be used in cleaning device 1. Furthermore, detergent A is preferable from the viewpoint of cleaning properties and emulsifying and dispersing properties.

[0073] Although the embodiment has been described above, the present invention is not limited to this embodiment, and may be modified as follows, for example. Furthermore, the embodiment and the modified examples, or the modified examples may be combined. Furthermore, examples not described in the embodiments or modifications, and design changes that do not deviate from the gist of the invention are also included in the inventions related to the embodiments.

[0074] <Modification> 1. Device body (1) Main body (1-1) Case Although the case 21 is made up of two members, the front case 51 and the rear case 53, it may be made up of three or more members, or may be made up of multiple members in the left-right or up-down directions. The handle portion 43 extends upward from both left and right ends of the case 21 so that a through portion can be formed between the handle portion 43 and the upper walls 513, 533 of the case 21, but a recessed portion may be formed instead of a through portion. The handle portion 43 is provided along the left-right direction, but may be provided with its center in the left-right direction along the front-rear direction. Although the operating unit 25 is provided on the handle 43, it may be provided on a side wall or an upper wall of the case 21. In this case, the handle 43 may be provided on one member such as the front case 51 or the rear case 53. The position of the handle portion 43 may be formed at a position other than the center in the front-rear direction if the position of the center of gravity of the device body 1 is not of concern.

[0075] (1-2) Blower The rotation shaft of the electric blower 235 extends in the front-rear direction, but may also extend in the left-right direction, the up-down direction, or a direction intersecting these directions. When the position of the blower 23 is not considered in terms of the positional relationship with other parts or the position of the center of gravity, the blower 23 may be disposed at one end side in the left-right direction other than the upper side. Although the blower 23 has the on-off valve 233 in the casing 230, the on-off valve may be provided in a dedicated cylindrical body as a separate structure. (1-3) Operation section The notification means 253 may be configured to notify the user that the suction tank 12 is full of water, is not installed, the battery 271 is not fully charged, etc., and may utilize, for example, lighting or flashing of an LED or the like, a change in the color of the light, or generation of a buzzer, voice, or other sound. Note that the circuitry may be configured to cause the notification means to issue a notification, and therefore may function as the notification unit.

[0076] (1-4) Power supply section The power supply unit 27 includes a battery 271, but if the problems that arise when an electric cord is used are not of concern, the power supply unit 27 may include an electric cord instead of the battery 271. The power supply unit 27 may include a battery 271 and an electric cord. In this case, the battery may be configured to be charged via the electric cord, or the battery may be configured not to be removable (the battery is charged by being attached as is). If the position of the power supply unit 27 is not concerned with the positional relationship with other parts or the center of gravity position, it may be located in the middle of the vertical direction and other than the other end side in the horizontal direction, or if the battery is long, its extension direction (longitudinal direction) may be located other than in the horizontal direction. Although the power supply unit 27 is arranged near the blower unit 23 and the circuit unit 29, if the wiring connecting them is not of interest, it does not need to be arranged near the blower unit 23 and the circuit unit 29. The power supply unit 27 and the operation unit 25 may be configured on a single board.

[0077] (1-5) Circuit section When the positional relationship with other parts and the center of gravity position are not taken into consideration, the circuit section 29 may be located at the upper side in the vertical direction and at a position other than the other end side in the horizontal direction. Although the circuit section 29 is arranged near the blower section 23 and the power supply section 27, if the wiring connecting them is not of interest, it does not need to be arranged near the blower section 23 and the power supply section 27. The circuit section 29 may include, for example, a power generating circuit section and a control circuit section on separate substrates. (1-6) Suction flow path and discharge flow path The suction flow path and the discharge flow path may be arranged in reverse in the front-rear direction, and there are no particular limitations on their arrangement or shape.

[0078] (1-7) Holding part If the holding method of the hand tool 7, the position of the center of gravity of the held hand tool 7, etc. are not of concern, the holding part 39 may hold the hand tool 7 at another position or may hold it in one place. Although case 21 has protrusion 530f at the portion where base portion 391 of holder 39 is attached, it may not have a protrusion, or may have a recessed portion. Note that protrusion 530f can reduce the apparent front-to-rear dimension of the device. The holding portion 39 has a base portion 391 and holding portions 393 and 395, and the base portion 391 is attached to the case 21, but the holding portion may be attached directly to the case, or the holding portion may be configured as a molded part that is a single piece with the case (rear case). The holding part 39 holds the hand tool 7 at two points, top and bottom, but may hold it at two points in other directions. For example, if the discharge tank part 75 is provided detachably in the front-rear direction with respect to the nozzle part 700, the hand tool 7 may be held at two points in the front-rear direction. The holding portion 39 holds the hand tool 7 at two points, top and bottom, but it may hold it at three or more points, or if the stability of the holding state of the hand tool 7 is not an issue, it may hold it at one point. The holding portion 39 may hold the nozzle portion 700 at two points, or may hold the discharge tank portion 75 at two points. The protruding portion 395b, which functions as a partition, may be located between the operation portion 716 and the discharge tank portion 75. The partition may be provided separately from the protruding portion 395b. Furthermore, if a different structure is used to prevent erroneous operation of the operation portion 716, the partition may not be provided.

[0079] (2) Suction tank (2-1) Overall Although the suction tank 12 is detachable from the main body 11, it may be provided independently of the main body 11 or may be fixed to the main body 11. When it is fixed to the main body 11, this can be achieved by providing a drain plug. The suction tank section 12 is arranged on the front side of the main body section 11, but if the need to arrange the suction tank section 12 on the front side is not important, it may be arranged on one side in the left-right or up-down direction. When viewed from the front, the suction tank 12 may be square, rectangular in shape that is long vertically, or rectangular in shape that is long horizontally or front-to-back. The suction tank section 12 is configured so that the center of gravity of the device main body 1 is located at the center in the front-to-back direction, taking into account the positional relationship with the blower section 23 and the power supply section 27, but if the positional relationship is not of concern, the center of gravity may be configured so that it is not located at the center in the front-to-back direction.

[0080] (2-2) Filter If the suction tank section 12 does not have a float 63, it does not need to have a filter, and if the float 63 is included but there is no concern about the problem of the float 63 not being able to move up and down smoothly due to debris, it does not need to have a filter. The single filter 64 may be provided downstream or upstream of the float accommodating section 65, or some of the multiple filters may be provided upstream of the float accommodating section 65 and the rest may be provided downstream of the float accommodating section 65. The suction tank section 12 has the filter 64 between the pair of lower partition plate sections 626, but the filter 64 may be provided on the upstream side or downstream side of the lower partition plate section 626, or two filters 64 may be provided, one on the upstream side and one on the downstream side. The lower partition plate section 626 may be located downstream of the float accommodating section 65.

[0081] (2-3) Float The float 63 is housed in the float housing portion 65, but may be attached to the suction tank portion 12 via a string, for example. In this case, the float 63 may or may not have a protrusion 631. The float 63 has a rectangular parallelepiped shape with the shortest dimension in the front-to-rear direction, but it may also have a rectangular parallelepiped shape with the shortest dimension in the up-down or left-to-right direction, or any other shape. In consideration of detection accuracy, it is preferable that the internal detection source have a large surface facing the liquid level detection unit.

[0082] 2. Hand tools (2-1) Overall When the hand tool 7 is held in the main body 11, the handle portion 739, operating portion 716, and discharge tank portion 75 of the hand tool 7 are arranged on the left and right sides of the main body 11, but they do not have to be lined up on the left and right sides. The hand tool 7 is provided with a discharge tank portion 75 in the nozzle portion 700, but the liquid to be discharged may be supplied from a tank not attached to the nozzle portion 700, or from a hose connected to a tap water faucet. Although the nozzle portion 700 is provided with the handle portion 739, it is not necessary to provide the handle portion 739. In this case, this can be implemented by providing the handle portion 739 on the discharge tank portion 75, for example.

[0083] (2-2) Nozzle section Nozzle unit 700 has discharge port 720a and suction port 736a, but for example, if discharge unit 714 is configured as a separate body, the nozzle unit may have a suction port without having a discharge unit. In other words, if it is not related to the discharge unit (invention), it does not have to have a discharge unit. The nozzle unit 700 may have suction ports 736a in the up-down direction, left-right direction, front-rear direction, or a direction intersecting any of these relative to the discharge port 720a. Furthermore, the suction ports 736a may be provided on both sides of the discharge port 720a in the up-down direction, left-right direction, front-rear direction, or a direction intersecting any of these, or multiple suction ports 736a may be provided surrounding the discharge port. In other words, suction ports may be provided in multiple locations. Furthermore, multiple communication ports formed in one location may constitute one suction port. When the nozzle portion 700 is held by the holding portion 39, it is arranged at the rear side of the main body portion 11, but if the suction tank portion 12 is arranged at a position other than the front side, it may be arranged on the opposite side of the main body portion 11 from the suction tank portion 12, or the suction tank portion 12 and the hand tool 7 may be provided on two adjacent sides.

[0084] (2-3) Operation section Although the operating unit 716 is a lever type that uses leverage, it may be of other shapes (types). For example, if the discharge mechanism is electric, it may have a structure that includes a switch. In this case, the operating unit 716 may or may not be located between the handle unit 739 and the discharge tank unit 75. Note that if the discharge tank unit 75 is not provided, it is preferable that the operating unit 716 be located on the front side (nozzle unit side) of the handle unit 739.

[0085] (2-4) Handle When an imaginary plane including the opening edge of suction port 736a is horizontal, handle portion 739 extends at an acute angle to the horizontal, and the angle is preferably 20 to 50 degrees. Note that handle portion 739 may also be parallel to the horizontal when the imaginary plane is horizontal. Protrusion 739a of handle portion 739 may protrude in a direction perpendicular to the extension direction of the cylindrical axis of handle portion 739, or may protrude in a direction inclined relative to the perpendicular direction. When the operability of handle portion 739 is not of concern, handle portion 739 does not need to have protrusion 739a. The handle portion 739 is cylindrical and has a suction flow path formed therein, but may be a separate structure from the member that forms the suction path.

[0086] (2-5) Discharge tank section Although the discharge tank portion 75 is detachable from the nozzle portion 700, it may be provided independently of the nozzle portion 700, or may be provided in a fixed manner. If provided independently, this can be achieved by connecting with piping such as a tube. If provided in a fixed manner, this can be achieved by providing at least a supply port in the discharge tank portion 75, and a cap for closing the supply port may be provided. Although the discharge tank 75 has a shape in which the bottom of the container is large, the shape is not particularly limited. However, the larger the bottom of the container, the more stable it will be when placed on a placement surface.

[0087] 3. Hose The detachable connection structure of the hose 8 with the hand tool 7 or the device main body 1 may be, in addition to the embodiment, a screw structure, an engagement structure such as a coupler, or a fastening structure such as a band. The hose 8 may be configured to be directly connected to the hand tool 7 or the device main body. In this case, the hose body may be configured to simply fit into the connecting portion of the hand tool or the device main body 1. The hose may be fixed to the hand tool 7 or the device body 1 .

[0088] <<Invention>> As examples of embodiments and modifications, at least the following inventions are included. <Invention 1> 1. Prior art Patent Publication No. 2021-66532 discloses a cleaning device having an apparatus main body 2 that houses a suction unit 21, with a downstream end 222 through which sewage flows into a sewage tank 6 located on the side to which a suction hose 8 is connected, and an upstream end 233 that communicates with the suction port of the suction unit 21 located on the opposite side to the side to which the suction hose 8 is connected. However, since the cleaning device described above is capable of sucking up liquid, measures are required to prevent the electrical components from getting wet with liquid, but there is a problem in that if the device falls over, dirty water may enter the suction unit 21 (hereinafter, for convenience, this will be referred to as the "first problem"). The cleaning device according to the first aspect of the present invention aims to realize a cleaning device that can prevent breakdowns in electrical components due to liquid wetting.

[0089] 2. Invention 1 (1) First cleaning device The first cleaning device is a main body having an electric blower that generates suction force; a tank portion for storing the sucked liquid; a nozzle portion having a suction port for sucking air and liquid; a hose connecting the nozzle portion and the main body portion; Equipped with the main body portion includes a connection portion for connecting to the hose on one side in the left-right direction, A communication portion that communicates the electric blower with the tank portion is located closer to the connection portion in the left-right direction. This prevents the main body from tipping over left or right (rotating around the front-to-rear axis) with the electric blower on the bottom, making it difficult for water in the tank to flow toward the communication part. The connecting portion may connect the hose detachably or non-detachably. Note that the connecting method is not particularly limited. The tank may be detachably or non-detachably attached to the main body, or may be attached to another member, or may be provided independently. An example of the tank is a suction tank. The position of the electric blower may be the same as or different from the position of the connecting portion in the vertical or front-rear direction. The nozzle portion only needs to have a suction port, and may or may not have other components, such as a discharge port or a brush portion. The communication section may be in a casing that houses the electric blower, in a member that is attached to the casing and inserted into the tank section, in the tank section, in a member that is attached to the tank section and inserted into the casing, or in a member that is attached to the tank section and inserted into a member that communicates with the casing. The liquid may be tap water or other water, water containing a detergent that enhances cleaning ability, an organic solvent with high cleaning ability (e.g., alcohol), electrolyzed water generated by electrolysis of water, electrolyzed water containing hypochlorous acid, etc. Also, a liquid containing the detergent of the embodiment may or may not be used.

[0090] (2) Second cleaning device The second cleaning device is the first cleaning device, The connection portion is located on the lower side of the main body portion. As a result, when the main body tilts left or right, the connection part or the main body side part of the hose comes into contact with the installation surface, thereby preventing the main body from tilting left or right and tipping over. The connecting portion may be connected to the hose on the outside of the main body portion or on the inside of the main body portion. The lower side is below the center of the main body in the vertical direction, but it may be in a position where the main body can abut against the installation surface in an inclined state before tipping over.

[0091] (3) Third cleaning device The third cleaning device is the first or second cleaning device, The tank portion is located to one side in the front-rear direction, the nozzle portion has a discharge port for discharging a liquid, a discharge tank portion for storing a liquid to be discharged is provided in the nozzle portion, At least one of the discharge tank portion and the nozzle portion is held on the other side of the main body portion in the front-rear direction with the bottom surface of the discharge tank portion facing the installation surface. This prevents the main body from tipping over to the other side in the front-to-rear direction. At least one of the discharge tank portion and the nozzle portion may be held on one side, the center, or the other side in the left-right direction. At least one of the discharge tank portion and the nozzle portion may be a discharge tank portion, a nozzle portion, or a combination of a discharge tank portion and a nozzle portion. The holding method may be the same as or different from the embodiment. The discharge tank portion may be held in a state where the bottom surface is in contact with the installation surface or not. The bottom surface of the discharge tank section may be a flat surface, a curved surface, or an inclined surface, as long as at least a portion of the bottom surface abuts (comes into contact with) the installation surface when the main body section is tilted to the other side in the front-to-rear direction.

[0092] <Invention 2> 1. Prior art Patent Publication No. 2021-66532 describes a cleaning device that includes an apparatus main body 2 that houses a suction unit 21, and a sewage tank 6 that has a suction port 601 through which sewage flows into the sewage tank 6 and an outlet 603 that communicates with the suction port 601 of the suction unit 21. When the liquid level in the wastewater tank 6 becomes high, the float 61 rotates to close the discharge port 603 . However, in the cleaning device described above, the float 613 needs to be positioned lower than the on-off valve 611, so unless the distance between the inner bottom of the wastewater tank 6 and the float 613 is increased, the amount of wastewater that can be stored in the wastewater tank 6 will be reduced. Conversely, increasing the distance will result in a problem of increased size (hereinafter, for convenience, this will be referred to as the "second problem"). The cleaning device according to the second aspect of the present invention aims to realize a cleaning device that can store a large amount of liquid in the tank while preventing the tank from becoming large.

[0093] 2. Invention 2 (1) First cleaning device The first cleaning device is a main body having an electric blower that generates suction force; a tank portion for storing the sucked liquid; a detection unit that detects a detection object that rises and falls according to the liquid level in the tank unit; Equipped with When the detection unit detects the object to be detected, the electric blower is stopped. This allows suction to be stopped upon detection of a detection object that rises and falls depending on the liquid level, making it possible to store a larger amount of liquid in the tank section than before. The detection unit only needs to be able to detect the object to be detected, and may be a sensor that detects magnetic force, an optical sensor that makes the tank transparent and detects reflected light from the object to be detected, or an optical sensor that makes the tank transparent and detects whether the transmitted light is blocked by the object to be detected. The object to be sensed may be the detection source itself to be sensed, or may be composed of the detection source (one example is a magnet) and a case that houses the detection source. The tank may be detachably or non-detachably attached to the main body. The tank may be any tank capable of storing the sucked liquid, and its shape, structure, etc. are not particularly limited. An example of a tank is a suction tank. The liquid may be tap water or other water, water containing a detergent that enhances cleaning ability, an organic solvent with high cleaning ability (e.g., alcohol), electrolyzed water generated by electrolysis of water, electrolyzed water containing hypochlorous acid, etc. Also, a liquid containing the detergent of the embodiment may or may not be used.

[0094] (2) Second cleaning device The second cleaning device is the first cleaning device, The tank portion is an inlet into which the aspirated liquid flows; a storage section in which the detection object is stored; a filter disposed downstream of the inlet and through which the sucked liquid passes; It has. This makes it easy to separate the dust from the liquid that has flowed in. The filter may be disposed either upstream or downstream of the object to be detected. The filter may be provided in a detachable or non-detachable manner in the tank portion, or may be provided in a detachable or non-detachable manner in a portion of the main body portion located downstream of the inlet.

[0095] (3) Third cleaning device The third cleaning device is the first or second cleaning device, The filter separates the downstream side of the inlet from the upstream side of the object to be detected. This prevents the object to be detected from moving up and down poorly due to dust contained in the flowing liquid.

[0096] (4) Fourth cleaning device The fourth cleaning device is the first to third cleaning devices, One or more protrusions are provided on the outer surface of the detection object and / or the inner wall of the container. This prevents the movement of the object to be detected from becoming impaired. In other words, since the sewage that flows in may contain various types of debris, when the object to be detected slides along the inner wall, it is possible to prevent the debris from getting caught and impeding its movement. It is also possible to prevent the object to be detected from coming into close contact (surface contact) with the inner wall of the storage section. The number, shape, and location of the protrusions are not particularly limited.

[0097] (5) Fifth cleaning device The fifth cleaning device is the fourth cleaning device, The object to be detected has a box shape, and the protrusion is provided on at least one of the top surface and the bottom surface. This can prevent the device from coming into close contact with the upper or lower wall of the storage section. The number of protrusions provided on at least one of the upper and lower surfaces may be one or more. Protrusions may also be provided on surfaces other than the upper and lower surfaces, or may not be provided at all.

[0098] (6) Sixth cleaning device The sixth cleaning device is the fourth or fifth cleaning device, The object to be detected is box-shaped and has a protrusion on the side. This can prevent the device from coming into close contact with the side wall of the storage section. The number of protrusions on the side surface may be one or more, and the protrusion is provided on at least one of the side surfaces.

[0099] (7) Seventh cleaning device The seventh cleaning device is the sixth cleaning device, The protrusions are provided on each of the two equal partitions of the surface. This separates the protrusions, making it easier for the surface to be parallel to the surface of the storage unit, and allowing the object to be detected to move up and down smoothly. The protrusions may or may not be provided on the dividing line. However, if the protrusions are provided spaced apart above and below the surface of the storage unit, there is a risk that the upper or lower surface of the object to be detected may get caught on the protrusions when the object to be detected is tilted in the vertical direction.

[0100] (8) Eighth cleaning device The projections are provided on each of the four equal partitions of the surface. This separates the protrusions, making it easier for the surface to be parallel to the surface of the storage section, and allowing the object to be detected to move up and down smoothly. Protrusions may or may not be provided on the boundary lines dividing the area into four equal parts.

[0101] <Invention 3> 1. Prior art Patent Publication No. 2021-66532 describes a cleaning device that includes an apparatus main body having a suction unit 21 that generates suction force, a hand tool 4 having a suction portion 42 for sucking air and liquid, and a wastewater tank 6 that stores the sucked wastewater. However, because the cleaning device described above is capable of sucking liquid, there is a problem in that measures must be taken to prevent the electrical components from getting wet with liquid (hereinafter, for convenience, this is referred to as the "third problem"). The cleaning device according to the third aspect of the present invention aims to realize a cleaning device that can suppress the occurrence of abnormalities.

[0102] 2. Invention 3 (1) First cleaning device The first cleaning device is a main body portion having an electric blower capable of sucking air and liquid and generating suction force; a tank portion for storing the sucked liquid; a detection unit that detects an abnormality; Equipped with When the abnormality is detected by the detection unit, the electric blower is stopped. This makes it possible to prevent trouble caused by abnormalities. Also, it is possible to prevent trouble caused by abnormalities. The "abnormalities" mentioned here include the main body tilting during use of the device, the electric blower or power supply becoming too hot, the liquid level in the tank becoming too high, the tank becoming detached from the main body, etc. An example of the tank is the suction tank in the embodiment. If an abnormality is detected and the electric blower is operated while the electric blower is not in operation (unused), the electric blower may be started once and then stopped, or may be stopped without being driven. In this case, the user may or may not be notified that the electric blower is stopped (since the electric blower is stopped, the user can understand that the electric blower is stopped). The liquid may be tap water or other water, water containing a detergent that enhances cleaning ability, an organic solvent with high cleaning ability (e.g., alcohol), electrolyzed water generated by electrolysis of water, electrolyzed water containing hypochlorous acid, etc. Also, a liquid containing the detergent of the embodiment may or may not be used.

[0103] (2) Second cleaning device The second cleaning device is the first cleaning device, the detection unit has a tilt sensor that detects the tilt of the main body unit, When the tilt sensor detects the tilt of the main body, the electric blower is stopped. This prevents the electric blower from operating when the main body is tilted. Also, if the main body is tilted and falls over, the electric blower will stop operating.

[0104] (3) Third cleaning device The third cleaning device is the first or second cleaning device, the detection unit has an attachment / detachment sensor that detects a state in which the tank unit is attached to the main body unit, When the attachment / detachment sensor does not detect that the tank unit is attached to the main body unit, the electric blower is stopped. This prevents the electric blower from operating when the tank portion comes off the main body portion during use (including when the tank portion is not separated from the main body portion and is not attached in the correct state). The detection here includes the case where there is no signal indicating an attached state and the case where there is a signal indicating an detached state.

[0105] (4) Fourth cleaning device The fourth cleaning device is the first to third cleaning devices, The device further includes a notification unit that notifies the user when an abnormality is detected by the detection unit. This makes it easier for the user to know that the device is in an abnormal state. The notification unit includes lighting or flashing of an LED or the like, changing the color of the light, and emitting a sound such as a buzzer or voice.

[0106] <Invention 4> 1. Prior art JP 2021-66532 A describes a cleaning device that includes a device body having a suction unit 21 that generates suction force and a wastewater tank 6 that stores the sucked wastewater. This cleaning device is supplied with power from a power source using an electric cord 26. However, the cleaning device as described above has a problem in that the range in which the user can carry it is limited by the electric cord 26, making it difficult to carry (hereinafter, for convenience, this is referred to as the "fourth problem"). The cleaning device according to the fourth aspect of the invention aims to realize a cleaning device that can be easily carried around.

[0107] 2. Invention 4 (1) First cleaning device The first cleaning device is a main body having an electric blower that generates suction force; a tank portion for storing the sucked liquid; Equipped with A handle portion is provided on the upper side of the main body portion, The tank portion is disposed on the front side of the main body portion, The electric blower is disposed so that its center of gravity is located on one side of the main body in the left-right direction, and the battery is disposed so that its center of gravity is located on the other side of the main body in the left-right direction. This improves the weight balance and makes it easier to carry. The electric blower and the battery may be disposed on one side and the other side in the left-right direction, and there are no particular limitations on their positions in the up-down direction. The battery may have a center of gravity on one side in the left-right direction, and there are no particular limitations on the type, form, shape, etc. of the battery. The electric blower is arranged with its rotation shaft extending in any of the front-rear direction, the up-down direction, the left-right direction, or a direction intersecting any of these directions. The tank unit may be attached to the main body unit in a detachable or non-detachable manner. The center of gravity of the tank unit is not particularly limited. An example of the tank unit is the suction tank unit of the embodiment. The handle portion may be provided so as to extend in the left-right direction, the front-rear direction, or a direction intersecting these. When it extends in the front-rear direction, it is preferably provided in a middle region in the left-right direction. The liquid may be tap water or other water, water containing a detergent that enhances cleaning ability, an organic solvent with high cleaning ability (e.g., alcohol), electrolyzed water generated by electrolysis of water, electrolyzed water containing hypochlorous acid, etc. Also, a liquid containing the detergent of the embodiment may or may not be used.

[0108] (2) Second cleaning device The second cleaning device is the first cleaning device, The handle portion is provided to extend in the left-right direction. This makes it easier to hold the handle at a position with good weight balance.

[0109] (3) Third cleaning device The third cleaning device is the first or second cleaning device, A circuit section for driving the electric blower is disposed on the other side of the main body in the left-right direction, opposite to the position of the electric blower. This allows the circuit unit and the battery, and the circuit unit and the electric blower to be arranged close to each other. By arranging these close to each other, it is possible to shorten the wiring, etc.

[0110] (4) Fourth cleaning device The fourth cleaning device is the third cleaning device, The battery is located below the circuit section. This lowers the center of gravity of the device, stabilizing the placed state.

[0111] (5) Fifth cleaning device The fifth cleaning device is the first to fourth cleaning devices, The direction in which the battery is attached and detached is along the left-right direction. This also prevents the device from becoming too large in size in the front-to-rear direction even if a long battery is used.

[0112] (6) Sixth cleaning device The sixth cleaning device is the first to fifth cleaning devices, the main body has an exhaust port for discharging exhaust gas from the electric blower to the outside, an exhaust flow path that guides exhaust gas toward the exhaust port is disposed within the main body; The exhaust passage supports the battery or a housing portion that houses the battery. This simplifies the structure compared to when a separate support portion is provided to support the battery or the storage portion.

[0113] <Invention 5> 1. Prior art Patent Publication No. 2021-66532 describes a cleaning device having an apparatus main body 2 that houses a suction unit 21, and a sewage tank 6 that has a suction port 601 through which sewage flows into the sewage tank 6 and an outlet 603 that communicates with the suction port of the suction unit 21. When the liquid level in the wastewater tank 6 becomes high, the float 61 rotates to close the discharge port 603 . However, when a float is used, there is a problem that the float adheres to the inner wall of the tank (hereinafter, for convenience, this will be referred to as the "fifth problem"). The cleaning device according to the fifth invention aims to realize a cleaning device that can smooth the movement of the float inside the tank portion.

[0114] 2. Invention 5 (1) First cleaning device The first cleaning device is a main body having an electric blower that generates suction force; a tank portion for storing the sucked liquid; a detection unit that detects a detection object that rises and falls according to the liquid level in the tank unit; Equipped with The object to be detected or a storage portion for storing the object to be detected has a protrusion. This prevents the object to be detected from coming into close contact with the container.

[0115] <Invention 6> 1. Prior art JP 2021-66532 A describes a cleaning device that includes a device body having a suction unit 21 that generates suction force and a wastewater tank 6 that stores the sucked wastewater. This cleaning device is supplied with power from a power source using an electric cord 26. However, the cleaning device as described above has a problem in that the range within which the user can carry it is limited by the electric cord 26 (hereinafter, for convenience, this is referred to as the "sixth problem"). The cleaning device according to the sixth aspect of the present invention aims to realize a cleaning device that is not limited in its portability.

[0116] 2. Invention 6 (1) First cleaning device The first cleaning device is The main body includes an electric blower that generates suction force and a battery that drives the electric blower, and the battery is chargeable and dischargeable. This eliminates the need for an electrical cord and increases portability.

[0117] <Other> The matters specifying each invention are not limited by the matters specifying other inventions. Furthermore, each invention may include the matters specifying other inventions, or may include the configurations described in the embodiments. [Explanation of symbols]

[0118] X Cleaning device 1. Device body 7. Hand Tools 8 Hose 11 Main body 12 Suction tank section (tank section) 235 Electric blower 331 Main body side connection part (connection part) 700 Nozzle

Claims

1. a main body having an electric blower that generates suction force; a tank portion for storing the sucked liquid; a nozzle portion having a suction port for sucking air and liquid; a hose connecting the nozzle portion and the main body portion; Equipped with the main body includes a connection portion for connecting to the hose on a lower side of one side surface in the left-right direction, the electric blower is positioned closer to the connection portion in the left-right direction of the main body, a through hole for communicating between the electric blower and the tank portion is positioned closer to the connection portion in the left-right direction of the tank portion, an outlet of a suction portion for sucking air and liquid from the nozzle portion into the tank portion is located on the opposite side of the tank portion from the connection portion in the left-right direction; Cleaning equipment.

2. The tank portion is located to one side in the front-rear direction, the nozzle portion has a discharge port for discharging a liquid, a discharge tank portion for storing a liquid to be discharged is provided in the nozzle portion, At least one of the discharge tank portion and the nozzle portion is held on the other side of the main body portion in the front-rear direction with a bottom surface of the discharge tank portion facing an installation surface. The cleaning device of claim 1 .

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