Suction port body and vacuum cleaner

Abstract

To provide a suction port body, when thread-like dust begins to wrap around rotary cleaning bodies, capable of discharging the thread-like dust so as not to be entangled in the rotary cleaning bodies, and a vacuum cleaner.SOLUTION: A vacuum cleaner 1 includes: rotary cleaning bodies 32 capable of scraping up dust on a cleaning object surface by rotating; a motor 33 as a drive source, for outputting drive force to rotate the rotary cleaning bodies 32; a support 52 sandwiched between the rotary cleaning bodies 32 and rotatably supporting the rotary cleaning bodies 32 in a cantilever manner; a power transmission mechanism 53 for transmitting the drive force from the motor 33 to the support 52 to rotate the rotary cleaning bodies 32; and a suction port body 41 for supporting the rotary cleaning bodies 32 via the support 52. Each of the rotary cleaning bodies 32 has a cleaning member 82 disposed such that a support end 32r side precedes a free end 32t side in a rotation direction, and the suction port body 41 has an inner-wall surface 32t that is located on an extension line of the rotation center line of the rotary cleaning bodies 32 and faces away from a free end 83i.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] An embodiment of the present invention relates to a suction mouth unit and a vacuum cleaner. [Background technology]

[0002] A vacuum cleaner suction tool is known that includes an agitator having a generally columnar central member and a band-shaped blade for picking up dust that is arranged in a generally V-shape along the longitudinal direction of the surface of the central member. The V-shaped valley of the blade is arranged in the center of the agitator, close to the suction port. This vacuum cleaner suction tool rotates the agitator so that both ends of the blade approach the suction port before the V-shaped valley. In this way, the vacuum cleaner suction tool sequentially collects dust on the floor surface from both ends of the band-shaped blade toward the V-shaped valley of the blade. The collected dust is efficiently sucked through the suction port. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 10-033424 Summary of the Invention [Problem to be solved by the invention]

[0004] The agitator of the conventional suction port guides thread-like dust such as hair to the V-shaped valley of the blade. The thread-like dust guided to the V-shaped valley of the blade is likely to be wound up by the agitator, and the thread-like dust wound up in the V-shaped valley of the blade becomes entangled with the agitator. The thread-like dust entangled with the agitator is not naturally removed from the agitator. In order to remove it, the user has no choice but to cut and remove the thread-like dust with a tool such as scissors. In other words, the conventional suction port has a high risk of the thread-like dust becoming entangled with the agitator, and is therefore inconvenient.

[0005] Therefore, an object of the present invention is to provide a suction port body and an electric vacuum cleaner that can discharge thread-like dust without entangling it around the rotating cleaning body when the thread-like dust starts to wrap around the rotating cleaning body. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, an electric vacuum cleaner according to an embodiment of the present invention comprises a vacuum cleaner body, an electric blower housed in the vacuum cleaner body and generating negative pressure, and a suction port body fluidly connected to the electric blower, wherein the suction port body comprises a rotary cleaning body capable of stirring up dust on a surface to be cleaned by rotating, a drive source which outputs a drive force to rotate the rotary cleaning body, a support part which rotatably supports the rotary cleaning body in a cantilevered manner, a power transmission mechanism which transmits the drive force from the drive source to the support part to rotate the rotary cleaning body, and a suction port body which supports the rotary cleaning body via the support part, wherein the rotary cleaning body has a cleaning member which is arranged so that the support end side closer to the support part precedes the free end side farther from the support part in the direction of rotation, and the suction port body has an inner wall surface which is on an extension of the rotational center line of the rotary cleaning body and faces away from the free end.

[0007] In addition, the suction port body according to an embodiment of the present invention comprises a rotating cleaning body capable of scraping up dust on a surface to be cleaned by rotating, a driving source which outputs a driving force to rotate the rotating cleaning body, a support part which rotatably supports the rotating cleaning body in a cantilevered manner, a power transmission mechanism which transmits the driving force from the driving source to the support part to rotate the rotating cleaning body, and a suction port body which supports the rotary cleaning body via the support part, wherein the rotary cleaning body has a cleaning member which is arranged so that the support end side closer to the support part precedes the free end side farther from the support part in the direction of rotation, and the suction port body has an inner wall surface which is on an extension of the rotational center line of the rotary cleaning body and faces away from the free end. [Brief description of the drawings]

[0008] [Figure 1] 1 is a perspective view of a vacuum cleaner according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a perspective view of a suction port body according to an embodiment of the present invention. [Diagram 3] FIG. 2 is a perspective view of a suction mouth body according to an embodiment of the present invention. [Figure 4] FIG. 2 is a plan view of a suction port body according to an embodiment of the present invention. [Diagram 5] FIG. 4 is a bottom view of the suction port body according to the embodiment of the present invention. [Figure 6] FIG. 2 is a perspective view of a suction port body according to an embodiment of the present invention, viewed from below. [Figure 7] FIG. 2 is a cross-sectional view of a suction port body according to an embodiment of the present invention. [Figure 8] FIG. 2 is a cross-sectional view of a suction port body according to an embodiment of the present invention. [Figure 9] FIG. 2 is a perspective cross-sectional view of a suction port body according to an embodiment of the present invention. [Figure 10] FIG. 3 is a cross-sectional view of a rotary cleaning body and a connecting mechanism according to the embodiment of the present invention. [Figure 11] FIG. 2 is a perspective view of a connecting mechanism according to an embodiment of the present invention. [Figure 12] FIG. 4 is a perspective view of a protrusion of a connecting mechanism according to the embodiment of the present invention. [Figure 13] FIG. 4 is a perspective view of a recess of a connecting mechanism according to an embodiment of the present invention. [Figure 14] FIG. 4 is a perspective view of a disconnecting body of the connecting mechanism according to the embodiment of the present invention. [Figure 15] FIG. 2 is a front view of a suction port body according to an embodiment of the present invention. [Figure 16] FIG. 13 is a perspective view of another example of the suction port body of the suction port body according to the embodiment of the present invention; [Figure 17] FIG. 11 is a cross-sectional view of another example of the suction port main body of the suction port body according to an embodiment of the present invention. [Figure 18] FIG. 4 is a schematic diagram showing a second example of a suction port body according to an embodiment of the present invention. [Figure 19] FIG. 13 is a schematic diagram showing a third example of a suction port body according to an embodiment of the present invention. [Figure 20] FIG. 13 is a schematic diagram showing a fourth example of a suction port body according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a suction mouth unit and a vacuum cleaner according to the present invention will be described with reference to FIGS.

[0010] FIG. 1 is a perspective view of a vacuum cleaner according to an embodiment of the present invention.

[0011] As shown in Fig. 1, the vacuum cleaner 1 according to this embodiment includes a load, for example, an electric blower 12, that is driven by power stored in a secondary battery 11. The secondary battery 11 is also called a storage battery, a rechargeable battery, or a rechargeable battery. The vacuum cleaner 1 is, for example, a stick-type vacuum cleaner.

[0012] The vacuum cleaner 1 may be a canister type, an upright type, or a handheld type. The vacuum cleaner 1 may be a cordless type having a secondary battery 11 as a power source, or may be a wired type that obtains power from a commercial AC power source via a power cord.

[0013] The vacuum cleaner 1 comprises a main body 16 having a handle 15 for hand-held operation, a secondary battery 11 that can be attached to and detached from the main body 16, an extension tube 17 connected to the main body 16, and a suction port body 18 connected to the extension tube 17.

[0014] The main body 16 includes a main body case 21 having a handle 15, an electric blower 12 housed in the main body case 21 and generating a negative suction pressure, a dust separation and collection unit 22 removably provided on the main body case 21, and a main body control unit 23 which mainly controls the operation of the electric blower 12 and the charging and discharging of the secondary battery 11.

[0015] Main body 16 drives electric blower 12 using power stored in secondary battery 11, generates negative pressure by driving electric blower 12, and causes the generated negative suction pressure to act on dust separation and collection section 22. The negative suction pressure acting on dust separation and collection section 22 acts sequentially on extension tube 17 and suction port body 18. The negative suction pressure that reaches suction port body 18 acts on suction port 25 of suction port body 18. The negative suction pressure acting on suction port 25 sucks air containing dust (hereinafter referred to as "dust-containing air") from the floor surface into suction port 25. The dust-containing air sucked into suction port 25 flows into dust separation and collection section 22 through suction port body 18 and extension tube 17. Dust separation and collection section 22 separates dust from the dust-containing air sucked in by the suction negative pressure, collects and accumulates the separated dust, and sends the air from which the dust has been separated to electric blower 12. Electric blower 12 exhausts the air from which the dust has been separated out of main body case 21.

[0016] Furthermore, the main body 16 is provided with an input section 26 that is arranged within a range in which a user holding the handle 15 can move his or her fingers.

[0017] The main body case 21 is arranged on the extension line of the extension tube 17 and comprises a columnar front portion 21a extending along the extension line of the extension tube 17, a central portion 21b hanging diagonally downward and rearward from the front portion 21a, a cylindrical rear portion 21c extending rearward from the lower half of the back surface of the central portion 21b, and a handle 15 extending rearward from the upper half of the back surface of the central portion 21b, curving in an arc shape and connecting to the rear end of the upper surface of the rear portion 21c.

[0018] The front part 21a and the central part 21b of the main body case 21 cooperate to detachably hold the dust separating dust collecting part 22. The dust separating dust collecting part 22 has a cylindrical appearance as a whole. The front part 21a and the central part 21b hold the dust separating dust collecting part 22 with the center line C of the dust separating dust collecting part 22, in other words, the longitudinal direction parallel to the extension line of the center line of the extension tube 17. When the extension tube 17 and the dust separating dust collecting part 22 are attached to the main body case 21, the extension line of the center line of the extension tube 17 and the center line C of the dust separating dust collecting part 22 are arranged on a central vertical cross section that divides the main body case 21 substantially equally into the left and right. In other words, the longitudinal front part 21a and the cylindrical dust separating dust collecting part 22 are arranged side by side so that their center lines are parallel to each other.

[0019] The front part 21a of the main body case 21 is disposed on the extension of the longitudinal direction of the extension tube 17, i.e., the extension direction, and extends in a tubular shape. The front part 21a is provided with a joint structure to which the extension tube 17 can be detached. The front part 21a has a main body connection port 28 which is a fluid inlet of the main body 16, and fluidly connects the extension tube 17 to the dust separation and collection unit 22. By removing the extension tube 17 from the main body 16, the main body connection port 28 also functions as a suction port when the main body 16 is used by itself.

[0020] The rear part 21c of the main body case 21 houses the electric blower 12 and the main body control part 23. The rear part 21c has an exhaust port 29 that discharges exhaust air from the electric blower 12 from inside the main body case 21. A battery mounting part 31 to which the secondary battery 11 can be attached and detached is provided at the bottom of the rear part 21c.

[0021] The central portion 21b of the main body case 21 holds and covers part of the rear end portion of the dust separating and collecting portion 22 provided next to the front portion 21a, and houses an air passage connecting the dust separating and collecting portion 22 and the electric blower 12. The central portion 21b is connected to the rear end portion of the front portion 21a, which extends substantially linearly, and bulges diagonally downward and rearward of the main body case 21. The central portion 21b has an appearance that slopes downward toward the rear of the main body case 21.

[0022] Handle 15 is provided integrally with main body case 21. Handle 15 is a part that a user holds with his / her hand in order to clean a floor surface with vacuum cleaner 1. Therefore, handle 15 preferably has an appropriate shape that allows it to be easily held with human fingers.

[0023] The handle 15 is installed between the front part 21a and the rear part 21c of the main body case 21. The handle 15 extends from the rear end of the front part 21a in the extension direction of the extension tube 17, and is curved in an arc to connect to the rear end of the rear part 21c. Between the handle 15 and the back surface of the central part 21b of the main body case 21, and between the handle 15 and the top surface of the rear part 21c of the main body case 21, a continuous space penetrates in the left-right direction (width direction) of the main body case 21. The fingers of the user gripping the handle 15, mainly the index finger, middle finger, ring finger, and little finger, are placed in this space.

[0024] Input unit 26 is provided near handle 15 within a range where a user holding handle 15 can move his / her fingers. Input unit 26 has a switch that receives a request to operate electric blower 12. This switch is electrically connected to main body control unit 23. A user of vacuum cleaner 1 can operate input unit 26 to alternate between operating and stopping electric blower 12.

[0025] The input unit 26 may include a switch for switching the operation mode of the electric blower 12. In this case, the main body control unit 23 switches the operation mode in the following order every time it receives an operation signal from the operation mode switching switch: strong → medium → weak → strong → medium → weak → .... Note that the input unit 26 may include a strong operation switch, a medium operation switch, and a weak operation switch separately instead of the operation mode switching switch.

[0026] The dust separation and collection unit 22 is disposed in an L-shaped storage space formed by the front part 21a and the center part 21b of the main body case 21. The dust separation and collection unit 22 separates, collects, and accumulates dust from the dust-containing air flowing into the main body 16, while sending clean air from which the dust has been removed to the electric blower 12. The dust separation and collection unit 22 is of a centrifugal separation type that centrifuges the dust and the air by utilizing the difference in mass between the dust and the air. A filtration separation type filter that filters out dust from the dust-containing air may be provided downstream of the dust separation and collection unit 22.

[0027] The dust separating and collecting part 22 extends in a cylindrical shape along the front-rear direction of the main body case 21. In other words, the dust separating and collecting part 22 is a cylindrical container having a center line C extending in the front-rear direction of the main body case 21. The direction along the center line C of the dust separating and collecting part 22, the extension direction of the dust separating and collecting part 22, and the longitudinal direction of the dust separating and collecting part 22 are substantially the same and substantially coincide with the front-rear direction of the main body case 21. Therefore, the center line C of the dust separating and collecting part 22 is substantially parallel to the center line of the extension tube 17. The dust separating and collecting part 22 is provided next to the front part 21a of the main body case 21. That is, the longitudinal direction of the dust separating and collecting part 22 follows the longitudinal direction of the front part 21a of the main body case 21. The diameter of the dust separating and collecting part 22 is larger than the width dimension of the front part 21a of the main body case 21, and the dust separating and collecting part 22 protrudes in the left-right direction (width direction) of the main body 16 beyond the front part 21a of the main body case 21. The left-right direction (width direction) of the main body 16 corresponds to the normal direction of the central vertical cross section of the main body 16. The center line C of the cylindrical dust separating and collecting part 22 is substantially included in the central vertical cross section of the main body 16.

[0028] The central portion 21b of the main body case 21 includes a connection port that is fluidly connected to the exhaust side of the dust separation and collection unit 22, and a separation unit downstream air duct that fluidly connects the connection port and the electric blower 12. The central portion 21b includes a portion that is sandwiched between the dust separation and collection unit 22 and the rear portion 21c of the main body case 21. The connection port and the separation unit downstream air duct are disposed in this portion.

[0029] The connection port is disposed at a portion facing the front of central portion 21b. The connection port faces directly at the rear end face of dust separation and collecting portion 22 when dust separation and collecting portion 22 is attached to main body case 21. Therefore, the connection port is disposed on an extension of center line C of dust separation and collecting portion 22 when dust separation and collecting portion 22 is attached to main body case 21.

[0030] The suction side of electric blower 12 is connected to dust separation and collection unit 22 via a connecting port and a separation unit downstream air duct pipe. Electric blower 12 generates suction negative pressure by drawing air from dust separation and collection unit 22. Electric blower 12 includes an impeller, an electric motor that generates a rotational driving force for the impeller, and a rotating shaft that transmits the rotational driving force from the electric motor to the impeller.

[0031] The impeller is, for example, a turbofan, and is equipped with a number of blades. Each blade has a twisted shape that gradually rises in the radial direction of the hub from the center of the conical hub toward the outer edge of the hub. In other words, each blade is a so-called three-dimensional blade in which the airfoil or wing section changes from the leading edge to the trailing edge. The impeller is covered by a case having an intake port.

[0032] Electric blower 12 has a cylindrical or columnar shape with a rotation shaft as its center. The center line of the rotation shaft faces the front-rear direction of main body case 21, and the suction port faces forward, and is housed in main body case 21. The center line of the rotation shaft of electric blower 12 is substantially located on an extension of center line C of dust separation and collection unit 22.

[0033] The main body control unit 23 is disposed directly behind the electric blower 12. The main body control unit 23 includes a microprocessor and a storage device serving as a storage unit for storing various calculation programs executed by the microprocessor, parameters, and the like. When implementing control that allows the operation mode of the electric blower 12 to be alternatively selected from a plurality of operation modes, the storage device stores various settings (arguments) related to the plurality of pre-set operation modes. The plurality of operation modes are associated with the output of the electric blower 12. A mutually different input value (input value of the electric blower 12, target value of the current flowing through the electric blower 12) is set for each operation mode. Each operation mode is associated with an operation request received by the input unit 26. The main body control unit 23 alternatively selects an arbitrary operation mode corresponding to the operation request of the input unit 26 from a plurality of pre-set operation modes, reads out the setting of the selected operation mode from the storage device, and operates the electric blower 12 according to the setting of the read operation mode.

[0034] The input value of electric blower 12 corresponds to the discharge amount of secondary battery 11. The discharge amount of secondary battery 11 is controlled by the level of the discharge current or discharge voltage of secondary battery 11. It is simple and preferable to control the discharge amount of secondary battery 11 by the level of the discharge current of secondary battery 11.

[0035] The secondary battery 11 is a so-called battery pack. The electric blower 12 and the main body control unit 23 are driven by discharging the power stored in the secondary battery 11, and the power consumed by the electric blower 12 and the main body control unit 23 is stored in the secondary battery 11 by charging the secondary battery 11 with power. The secondary battery 11 can be attached to and detached from the main body case 21. In other words, the electric vacuum cleaner 1 can be used by appropriately replacing a plurality of secondary batteries 11. When the charging rate of the secondary battery 11 attached to the electric vacuum cleaner 1 decreases, the secondary battery 11 can be replaced with a charged secondary battery 11, so that the electric vacuum cleaner 1 can continue to operate. In other words, the secondary battery 11 can be charged while attached to the main body case 21, or it can be removed from the main body case 21, attached to a charger different from the electric vacuum cleaner 1, charged, and then reattached to the main body case 21 after charging. In addition, the vacuum cleaner 1 may be one in which the secondary battery 11 can be easily replaced, or may be one in which the secondary battery 11 can be replaced such that replacement of the secondary battery 11 requires disassembly of the main body 16.

[0036] The extension tube 17 and the suction port body 18 suck in dust on the floor surface together with air by the negative pressure applied by the electric blower 12 and guide it to the main body 16.

[0037] The extension tube 17 is fluidly connected to the suction side of the electric blower 12 via the main body connection port 28 of the main body case 21 and the dust separation and collection unit 22. The extension tube 17 has a length that substantially reaches the floor surface when a user holds the handle 15 of the main body 16. One end of the extension tube 17 has a joint structure that is detachable from the main body connection port 28 of the main body 16. The other end of the extension tube 17 has a joint structure that is detachable from the suction port body 18 of the main body 16. The extension tube 17 may be extendable or may have a fixed length that is not extendable.

[0038] The suction port body 18 can run or slide on a floor surface such as a wooden floor or a carpet, and has a suction port 25 on the bottom surface that faces the floor surface when running or sliding. The suction port body 18 also includes a rotatable rotary cleaning body 32 disposed at the suction port 25, and an electric motor 33 that drives the rotary cleaning body 32. One end of the suction port body 18 has a joint structure that can be detachably attached to the other end of the extension tube 17. The suction port body 18 is fluidly connected to the suction side of the electric blower 12 via the extension tube 17. The suction port body 18, the extension tube 17, and the dust separation and collection unit 22 form an intake air passage that runs from the electric blower 12 to the suction port 25.

[0039] The suction port body 18 may be provided with a windmill or turbine for driving the rotary cleaning body 32 instead of the electric motor 33. The windmill or turbine is rotated by the flow of air sucked into the vacuum cleaner 1, thereby driving the rotary cleaning body 32.

[0040] When the input unit 26 is operated while the electric blower 12 is stopped, the electric vacuum cleaner 1 starts the electric blower 12. If an operation mode changeover switch is implemented, the electric vacuum cleaner 1 first starts the electric blower 12 in a strong operation mode, and when the operation mode changeover switch is operated, the operation mode of the electric blower 12 is changed to a medium operation mode, and when the operation mode changeover switch is operated again, the operation mode of the electric blower 12 is changed to a weak operation mode, and so on. The strong operation mode, the medium operation mode, and the weak operation mode are a plurality of operation modes that are set in advance. The input value for the electric blower 12 is the largest in the strong operation mode, and the smallest in the weak operation mode. The started electric blower 12 sucks air from the dust separation and collection unit 22, creating a negative pressure inside the dust separation and collection unit 22.

[0041] The negative pressure in dust separating and collecting section 22 acts on suction port 25 through main body connection port 28, extension tube 17, and suction port body 18 in that order. The vacuum cleaner 1 cleans the surface to be cleaned by sucking in dust on the surface to be cleaned together with air using the negative pressure acting on suction port 25. Dust separating and collecting section 22 separates dust from the dust-containing air sucked into vacuum cleaner 1 and accumulates it, while sending the air separated from the dust-containing air to electric blower 12. Electric blower 12 exhausts the air sucked in from dust separating and collecting section 22 to the outside of main body 16.

[0042] Next, the suction port body 18 will be described in detail.

[0043] FIG. 2 is a perspective view of the suction port body according to the embodiment of the present invention.

[0044] As shown in FIG. 2, the suction port body 18 according to this embodiment includes a substantially rectangular parallelepiped suction port main body 41 and a connection pipe 42 provided at the rear of the suction port main body 41.

[0045] Note that the front / rear, left / right, and up / down of suction port body 18 will be described with reference to the user of vacuum cleaner 1. The direction of solid line arrow X in Fig. 2 is the forward or forward direction of suction port body 18, and the opposite direction is the rear or backward direction. The direction of solid line arrow Y in Fig. 2 is to the left of suction port body 18, and the opposite direction is to the right. Furthermore, the direction of solid line arrow Z in Fig. 2 is above suction port body 18, and the opposite direction is below. In other words, Fig. 2 is a perspective view of suction port body 18 viewed from the front left of the user of vacuum cleaner 1.

[0046] The shape of the suction port body 41 in a plan view is a rectangle with short sides in the front-rear direction and long sides in the left-right direction. In other words, the left-right dimension of the suction port body 41, i.e., the width dimension, is greater than the front-rear dimension of the suction port body 41, i.e., the depth dimension. In general, a user advances the suction port body 18 to make the suction port body 18 enter an uncleaned surface f to be cleaned. Therefore, the horizontally long suction port body 18 can remove dust from a wider range of the surface f to be cleaned in one operation.

[0047] The suction port body 41 includes a lower case 45 and an upper case 46 that covers the lower case 45 .

[0048] The connecting pipe 42 is provided at the rear of the suction port body 41 and at approximately the center in the width direction. The connecting pipe 42 is a so-called universal joint. The connecting pipe 42 includes a rotating connecting pipe 48 that is rotatable with respect to the suction port body 41 and a swinging connecting pipe 49 that is swingable with respect to the rotating connecting pipe 48.

[0049] The rotary connecting pipe 48 rotates around a center line (a line segment coinciding with the X-axis or a line segment parallel to the X-axis) extending in the front-rear direction of the suction port body 18. This center line is preferably disposed so as to divide the suction port body 41 into two halves, left and right.

[0050] The swing connecting pipe 49 swings about a line segment perpendicular to the rotation center line of the rotating connecting pipe 48 or a line segment parallel to a line segment perpendicular to the rotation center line of the rotating connecting pipe 48. The free end of the swing connecting pipe 49 is a joint that can be detachably attached to the free end of the extension pipe 17.

[0051] FIG. 3 is a perspective view of the suction port body according to the embodiment of the present invention.

[0052] FIG. 4 is a plan view of the suction port body according to the embodiment of the present invention.

[0053] FIG. 5 is a bottom view of the suction port body according to the embodiment of the present invention.

[0054] FIG. 6 is a perspective view of the suction port body according to the embodiment of the present invention, as viewed from below.

[0055] FIG. 7 is a cross-sectional view of the suction port body according to the embodiment of the present invention taken along line VII-VII in FIG.

[0056] 3, the upper case 46 has been removed from the suction port body 18. In FIG. 6, the left-rotating cleaning body 32L has been removed from the suction port body 18.

[0057] As shown in Figures 3 to 7, the suction port body 18 of this embodiment comprises a suction port main body 41, a pair of rotating cleaning bodies 32 that can rotate to scrape up dust on the surface f to be cleaned, an electric motor 33 as a driving source that outputs a driving force to rotate the pair of rotating cleaning bodies 32, a support part 52 that is sandwiched between the pair of rotating cleaning bodies 32 and supports the pair of rotating cleaning bodies 32 in a cantilevered manner so that they can rotate on the same rotation center line Cr, a power transmission mechanism 53 that transmits the driving force from the electric motor 33 to the support part 52 to rotate the pair of rotating cleaning bodies 32, and a suction port body control part 55 that controls the operation of the electric motor 33.

[0058] The suction port body 41 has a cleaning body accommodating recess 61 in which a pair of rotating cleaning bodies 32 are arranged, and a dust suction recess 62 capable of applying negative pressure to suck in dust that is scraped up by the pair of rotating cleaning bodies 32 from the surface to be cleaned f.

[0059] The cleaning body accommodating recess 61 is disposed along the front edge of the suction port body 41 and spans the entire width of the suction port body 41. The cleaning body accommodating recess 61 defines a cleaning body chamber 63 in which the rotating cleaning body 32 can be placed. The cleaning body chamber 63 is open toward the bottom surface 41b of the suction port body 41. The cleaning body chamber 63 accommodates the rotating cleaning body 32 with a portion of the rotating cleaning body 32 exposed to the bottom surface 41b of the suction port body 41. When the suction port body 41 is placed on the ground with the bottom surface 41b facing the surface f to be cleaned, the portion of the rotating cleaning body 32 exposed outside the cleaning body chamber 63 is pressed against the surface f to be cleaned.

[0060] In a bottom view of the suction port body 41, the dust suction recess 62 is disposed behind the cleaning body accommodating recess 61 and is disposed along the cleaning body accommodating recess 61. Therefore, in a bottom view of the suction port body 41, the dust suction recess 62 is disposed behind the pair of rotating cleaning bodies 32 and the support part 52 and is disposed along the pair of rotating cleaning bodies 32 and the support part 52. The dust suction recess 62 defines a suction chamber 65 in which negative pressure can be applied through the connecting pipe 42. The suction chamber 65 is open toward the bottom surface 41b of the suction port body 41. The projection surface of the dust suction recess 62 on the bottom surface 41b of the suction port body 41 corresponds to the suction port 25 of the suction port body 18. The suction port 25 faces the surface to be cleaned f without being blocked by the pair of rotating cleaning bodies 32. In other words, the suction chamber 65 is an open space having the suction port 25. The dust suction recess 62 is connected to the connecting pipe 42 at the center portion in the width direction of the suction port body 41 .

[0061] Moreover, the dust suction recess 62 reaches both the left and right side surfaces of the suction port body 41 across the entire width of the suction port body 41. In other words, the dust suction recess 62 extends to the vicinity of each of the free ends 32t of the pair of rotating cleaning bodies 32. That is, the suction port 25 opens toward both the left and right side surfaces of the suction port body 41. The suction port 25 opens continuously across the bottom surface 41b of the suction port body 41 and across both the left and right side surfaces. Therefore, the suction port body 18 can suck dust on the surface to be cleaned f facing the bottom surface 41b of the suction port body 41 across the entire width of the suction port body 41 by the action of negative pressure.

[0062] Furthermore, the dust suction recess 62 is shallower in places closer to the left and right side surfaces of the suction port body 41, and deeper in places closer to the center in the width direction of the suction port body 41. In other words, the dust suction recess 62 is inclined so that it is deeper closer to the center of the suction port body 41. This inclination narrows the air passage cross-sectional area of ​​the dust suction recess 62 from the center part of the suction port body 41 to the parts closer to the left and right side surfaces. This inclination smoothly guides the air sucked into the suction chamber 65, which extends elongatedly in the width direction of the suction port body 18, to the center part of the suction chamber 65 connected to the connecting pipe 42. This inclination also increases the wind speed of the air sucked into the suction chamber 65 in places close to the left and right side surfaces of the suction port body 41.

[0063] The suction port body 41 is provided with a partition 68 that is located between the cleaning body accommodating recess 61 and the dust suction recess 62 and extends downward toward the bottom surface 41b of the suction port body 41. The partition 68 does not completely separate the cleaning body accommodating recess 61 and the dust suction recess 62, but separates the cleaning body chamber 63 and the suction chamber 65 to such an extent that they are connected even when the suction port body 41 is placed on the ground with the bottom surface 41b facing the surface to be cleaned f. Therefore, when the rotating cleaning body 32 is rotated so as to scoop up dust on the surface to be cleaned f toward the rear of the suction port body 41, the scooped up dust is efficiently thrown into the suction chamber 65.

[0064] The cleaning body accommodating recess 61 and the dust suction recess 62 are provided in the lower case 45. The suction port main body 41 also includes an air path narrowing pipe 72 that is fixed to the lower case 45 and smoothly connects the shape of the suction chamber 65 and the shape of the air path in the connecting pipe 42. The air path narrowing pipe 72 defines an air path that connects the suction chamber 65 and the air path in the connecting pipe 42.

[0065] Furthermore, the suction port body 41 is provided with a plurality of rollers 75 that contact the surface to be cleaned f and support the suction port body 41. The plurality of rollers 75 are arranged on the bottom surface 41b of the suction port body 41. The plurality of rollers 75 include a pair of rollers 75 arranged near the rear of the dust suction recess 62 and at each of the left and right ends of the suction port body 41, and a roller 75 arranged in the rear center of the suction port body 41.

[0066] The suction port body 41 is provided with a linear cleaning body 76 that is disposed behind the dust suction recess 62 and extends continuously along the dust suction recess 62. The linear cleaning body 76 may be, for example, a brushed or rubber blade. The linear cleaning body 76 increases the negative pressure of the suction port 25 by blocking the air flow from the rear of the suction port body 41 toward the suction port 25. The linear cleaning body 76 is sandwiched between a pair of rollers 75 disposed at the left and right ends of the suction port body 41, and is disposed along the axles of the pair of rollers 75. Therefore, even when the suction port body 41 is in contact with the surface to be cleaned f, the multiple rollers 75 ensure the distance between the bottom surface 41b of the suction port body 41 and the surface to be cleaned f. In other words, the linear cleaning body 76 is not crushed by the suction port body 18.

[0067] A space is defined between the lower case 45 and the upper case 46 of the suction port body 41. This space includes an electric motor chamber 77 that houses the electric motor 33, a machine chamber 78 that houses the power transmission mechanism 53, and a control chamber 79 that houses the suction port body control unit 55. The electric motor chamber 77, the machine chamber 78, and the control chamber 79 may be connected or separated. The electric motor chamber 77, the machine chamber 78, and the control chamber 79 are disposed behind the cleaning body accommodating recess 61 in a plan view of the suction port body 41.

[0068] In a plan view of the suction port body 41 , the machine chamber 78 is disposed so as to be sandwiched between the connecting pipe 42 and the cleaning element accommodating recess 61 .

[0069] In a plan view of the suction port body 41, the motor chamber 77 is disposed on either the left or right side of the machine chamber 78. The motor chamber 77 accommodates the cylindrical motor 33 as close as possible to the cleaning body accommodating recess 61. In other words, the bottom of the motor 33 is disposed below the top of the cleaning body accommodating recess 61. Such an arrangement of the motor 33 and the configuration of the motor chamber 77 keep the height of the suction port body 41 lower than the sum of the height (diameter) of the pair of rotating cleaning bodies 32 and the height (diameter) of the motor 33, even when the motor 33 is disposed above the pair of rotating cleaning bodies 32.

[0070] In a plan view of the suction port body 41, the control chamber 79 is disposed on either the left or right side of the connecting pipe 42. The motor chamber 77 and the control chamber 79 may be disposed concentratedly on either the left or right side of the suction port body 41, or may be disposed distributed on both the left and right sides.

[0071] The pair of rotating cleaning bodies 32 are rotatably provided on the suction port body 41 via the support portion 52. The pair of rotating cleaning bodies 32 includes a left rotating cleaning body 32L disposed on either the left or right side of the suction port body 41, for example, the left half, and a right rotating cleaning body 32R disposed on either the left or right side of the suction port body 41, for example, the right half. The left rotating cleaning body 32L is disposed on the left side of the support portion 52 (the right side in a front view of the suction port body 41), and the right rotating cleaning body 32R is disposed on the right side of the support portion 52 (the left side in a front view of the suction port body 41). That is, the pair of rotating cleaning bodies 32 sandwich the support portion 52 between them. Each of the pair of rotating cleaning bodies 32 is supported by the support portion 52 so as to be rotatably driven around the same rotation center line Cr extending in the left-right direction of the suction port body 41. That is, the rotation center line Cr of the pair of rotating cleaning bodies 32 is oriented in the width direction of the suction port body 41.

[0072] Each of the pair of rotating cleaning bodies 32 has a support end 32r close to the support portion 52 and a free end 32t far from the support portion 52. The support end 32r of the left rotating cleaning body 32L and the support end 32r of the right rotating cleaning body 32R sandwich the support portion 52 therebetween. The distance between the free end 32t of the left rotating cleaning body 32L and the free end 32t of the right rotating cleaning body 32R substantially corresponds to the overall width of the pair of rotating cleaning bodies 32. The overall width of the pair of rotating cleaning bodies 32 substantially spans the entire width of the suction port body 41. In other words, the free end 32t of the left rotating cleaning body 32L is disposed at the left end of the suction port body 41, and the free end 32t of the right rotating cleaning body 32R is disposed at the right end of the suction port body 41. The overall width of the pair of rotating cleaning bodies 32 may exceed the width dimension of the suction port body 41. The free end 32t of the left rotating cleaning body 32L may protrude outside the left side wall of the suction port body 41, and the free end 32t of the right rotating cleaning body 32R may protrude outside the right side wall of the suction port body 41.

[0073] Each of the pair of rotary cleaning bodies 32 includes a shaft core portion 81 that extends from the support end 32r to the free end 32t, and a cleaning member 82 that is provided on the outer periphery of the shaft core portion 81.

[0074] The cleaning member 82 is arranged so that the support end 32r of the rotary cleaning body 32 precedes the free end 32t in the direction of rotation of the rotary cleaning body 32. The cleaning member 82 is arranged in a spiral shape that winds in accordance with the rotation of the rotary cleaning body 32 from the support end 32r of the rotary cleaning body 32 to the free end 32t. When the rotary cleaning body 32 is rotated, the cleaning member 82 is wound around the rotary cleaning body 32 in a spiral shape from the support end 32r of the rotary cleaning body 32 to the free end 32t. In other words, the pair of rotary cleaning bodies 32 have spiral cleaning members 82 that extend in different directions. The cleaning member 82 may be wound around the shaft core 81 in the axial direction more than once, i.e., 360 degrees or more, or may be wound in a range less than once.

[0075] The cleaning member 82 is a brush bristles. The cleaning member 82 radially surrounds the outer periphery of the shaft core portion 81 and draws multiple spirals. For example, the cleaning member 82 draws eight spirals to spirally surround the shaft core portion 81. The multiple spirals drawn by the cleaning member 82 may all protrude from the shaft core portion 81 at the same length, or may have different protruding lengths. In addition, the multiple spirals drawn by the cleaning member 82 may have the same rigidity, or may have different rigidities. The rigidity of the cleaning member 82 is also called bristle stiffness. Furthermore, the multiple spirals drawn by the cleaning member 82 may surround the shaft core portion 81 without any gaps. In this case, the multiple spirals may be divided by at least one of the bristle stiffness of the cleaning member 82, the density of the cleaning member 82, and the protruding length of the cleaning member 82.

[0076] The cleaning member 82 of the left-rotating cleaning body 32L is wound around the shaft core portion 81 counterclockwise from the support end 32r toward the free end 32t when the free end 32t is viewed from the support end 32r, and the cleaning member 82 of the right-rotating cleaning body 32R is wound around the shaft core portion 81 clockwise from the support end 32r toward the free end 32t when the free end 32t is viewed from the support end 32r. Therefore, the cleaning member 82 of the left-rotating cleaning body 32L is wound around the shaft core portion 81 counterclockwise from the support end 32r toward the free end 32t when the left side of the suction port main body 41 is viewed from the support portion 52, and the cleaning member 82 of the right-rotating cleaning body 32R is wound around the shaft core portion 81 clockwise from the support end 32r toward the free end 32t when the right side of the suction port main body 41 is viewed from the support portion 52.

[0077] Therefore, when the pair of rotating cleaning bodies 32 are rotated so as to scrape up dust on the surface to be cleaned f toward the rear of the suction port body 41, the contact point between the cleaning member 82, whose support end 32r side is ahead of the free end 32t side in the rotational direction, and the surface to be cleaned f moves continuously from the part close to the support end 32r of the cleaning member 82 to the part close to the free end 32t.

[0078] The pair of rotating cleaning bodies 32 may be mostly housed in the cleaning body chamber 63, or most of the cleaning members 82 may be exposed to the outside of the cleaning body chamber 63. The exposed portion of the rotating cleaning body 32 is preferably a part of the front surface of the suction port main body 41.

[0079] The left and right side walls 83 of the cleaning body accommodating recess 61 that defines the cleaning body chamber 63 may expose or cover the free ends 32t of the pair of rotating cleaning bodies 32. The side walls 83 that expose the free ends 32t may have an arc-shaped edge 83e that conforms to the external shape of the rotating cleaning body 32. The side walls 83 (hatched area in FIG. 6) that cover the free ends 32t are on an extension of the rotation center line Cr of the rotating cleaning body 32 and have an inner wall surface 83i that faces the free ends 32t. The inner wall surface 83i of the cleaning body accommodating recess 61 may be in contact with the free ends 32t of the rotating cleaning body 32 or may be separated from the free ends 32t of the rotating cleaning body 32 by a gap. The thinner the side walls 83 are, the more preferable they are as long as they have a thickness that can prevent obstacles from contacting the free ends 32t.

[0080] The gap between the suction port body 41 and the free ends 32t of the pair of rotary cleaning bodies 32 is preferably narrower than the gap between the suction port body 41 and the other parts of the pair of rotary cleaning bodies 32 than the free ends 32t. At least one of the rotary cleaning body 32 and the side wall 83 preferably has a seal portion 84 provided between the free ends 32t of the rotary cleaning body 32 and the side wall 83. The seal portion 84 is provided between the suction port body 41 and the pair of rotary cleaning bodies 32. The seal portion 84 does not completely cover the gap between the rotary cleaning body 32 and the side wall 83, and does not hinder the discharge of thread-like dust that escapes from the free ends 32t of the rotary cleaning body 32, for example, raised nap. When the seal portion 84 is provided at the free ends 32t of the rotary cleaning body 32, the seal portion 84 is integral with the rotary cleaning body 32 and rotates at the same rotation speed as the cleaning member 82. The seal portion 84 may be provided at the side wall 83 of the suction port body 41. The seal portion 84 provided on the rotary cleaning body 32 may or may not be in contact with the side wall 83. The seal portion 84 provided on the side wall 83 of the suction port main body 41 may or may not be in contact with the rotary cleaning body 32.

[0081] In a plan view of the suction port body 41, the electric motor 33 is preferably arranged so that its output shaft 33a is parallel to the rotation center line Cr of the pair of rotating cleaning bodies 32. The electric motor 33 is arranged away from each of the left and right ends of the suction port body 41 and near the center in the width direction of the suction port body 41. The electric motor 33 is heavy compared to other components of the suction port body 18. Therefore, if the electric motor 33 is arranged at either the left or right end of the suction port body 41, the center of gravity of the suction port body 18 will be away from the connection pipe 42, and the handleability of the suction port body 18 will be reduced. By arranging the electric motor 33 near the center in the width direction of the suction port body 41 as in the suction port body 18 according to this embodiment, the center of gravity of the suction port body 18 will be closer to the connection pipe 42, and the handleability of the suction port body 18 will be improved.

[0082] With the suction port body 41 placed on the surface to be cleaned f, the electric motor 33 rotates the pair of rotating cleaning bodies 32 in a direction to sweep and collect dust on the surface to be cleaned f toward the suction port 25. The electric motor 33 rotates the pair of rotating cleaning bodies 32 in a rotation direction that assists the forward movement of the suction port body 18.

[0083] The support part 52 is sandwiched between the pair of rotating cleaning bodies 32. The support part 52 includes a bearing housing 85 fixed to the lower case 45 of the suction port main body 41. The support part 52 may be disposed within the cleaning body chamber 63, or may divide the cleaning body chamber 63 into left and right halves. In other words, the cleaning body accommodating recess 61 may define the cleaning body chamber 63 in which the support part 52 and the pair of rotating cleaning bodies 32 are disposed collectively, or may define a pair of left and right cleaning body chambers 63 in which each of the pair of rotating cleaning bodies 32 is disposed individually.

[0084] The bottom surface of the bearing housing 85 is a part of the bottom surface 41b of the suction port body 41. The bottom surface of the bearing housing 85 is preferably provided with nonwoven fabric. The nonwoven fabric preferably has a pile that is long enough to contact the surface to be cleaned f when the suction port body 41 is placed on the ground with the bottom surface 41b facing the surface to be cleaned f. This nonwoven fabric inhibits the flow of air in the gap between the bearing housing 85 and the surface to be cleaned f to increase the negative pressure in the suction chamber 65 and also improves the dust removal performance in the area between the pair of rotating cleaning bodies 32 divided into left and right. When the bottom surface of the bearing housing 85 is away from the surface to be cleaned f, the cleaning body accommodating recess 61 defines the cleaning body chamber 63 in which the support part 52 and the pair of rotating cleaning bodies 32 are collectively arranged. When the bottom surface of the bearing housing 85, or the nonwoven fabric provided on the bottom surface of the bearing housing 85, is close to the surface to be cleaned f, the cleaning body accommodating recess 61 defines a pair of left and right cleaning body chambers 63 in which each of the pair of rotating cleaning bodies 32 is individually positioned.

[0085] The power transmission mechanism 53 includes a drive pulley 86 provided integrally with the output shaft 33a of the electric motor 33, a driven pulley 87 connected integrally with the pair of rotary cleaning bodies 32, and a belt 88 that transmits the driving force output by the electric motor 33 from the drive pulley 86 to the driven pulley 87. The reduction ratio of the power transmission mechanism 53 is set so that the pair of rotary cleaning bodies 32 can be rotated with a torque that the electric motor 33 can output. The power transmission mechanism 53 transmits the driving force of the electric motor 33 to the pair of rotary cleaning bodies 32 so that the pair of rotary cleaning bodies 32 rotate in a rotational direction that assists the forward movement of the suction port body 18.

[0086] The electric motor 33 and the power transmission mechanism 53 may be housed inside the rotary cleaning body 32, that is, inside the shaft core portion 81.

[0087] Alternatively, the support portion 52 may support the pair of rotary cleaning bodies 32 so as to be capable of rotating separately, and the power transmission mechanism 53 may transmit driving force separately to the pair of rotary cleaning bodies 32. In other words, the support portion 52 and the power transmission mechanism 53 may be separated into left and right portions.

[0088] The suction port body control unit 55 operates the electric motor 33 using power supplied from the main body 16 via the extension tube 17 .

[0089] When the suction port body 18 is advanced on the surface f to be cleaned, the pair of rotating cleaning bodies 32 rotating in a direction to assist the advancement of the suction port body 18 rakes up dust on the surface f to be cleaned in the opposite direction to the moving direction of the suction port body 18. In other words, the pair of rotating cleaning bodies 32 rotating in a direction to assist the advancement of the suction port body 18 rakes up dust on the surface f to be cleaned toward the dust suction recess 62 located behind the cleaning body accommodating recess 61. The rake-up dust is sucked into the air passage narrowing tube 72 by the negative pressure acting on the dust suction recess 62, and is collected in the dust separating and collecting section 22.

[0090] Here, when the dust on the surface to be cleaned f includes thread-like dust such as hair, the pair of rotary cleaning bodies 32 pushes a part of the thread-like dust, for example, a middle part, against the surface to be cleaned f, and sends the part of the thread-like dust behind the pair of rotary cleaning bodies 32. The part of the thread-like dust sent behind the pair of rotary cleaning bodies 32 is sucked in by the negative pressure acting on the dust suction recess 62. In other words, the suction port body 18 according to this embodiment tries to suck in a part of the thread-like dust that is behind the pair of rotary cleaning bodies 32 and is not pressed down by the pair of rotary cleaning bodies 32, by the negative pressure acting on the dust suction recess 62, in a state in which the middle part of the thread-like dust is pressed down against the surface to be cleaned f by the pair of rotary cleaning bodies 32. In this way, the suction port body 18 according to this embodiment prevents the thread-like dust from getting wrapped around the pair of rotary cleaning bodies 32.

[0091] However, some of the thread-like dust that is not pressed down by the pair of rotating cleaning bodies 32 may miss the air flow generated by the negative pressure acting on the dust collection recess 62 and become entangled around the pair of rotating cleaning bodies 32.

[0092] Therefore, the suction port body 18 according to this embodiment has a spiral cleaning member 82 arranged so that the contact point between the pair of rotating cleaning bodies 32 and the surface to be cleaned f moves continuously from a portion close to the support end 32r to a portion close to the free end 32t. The contact point between the spiral cleaning member 82 and the surface to be cleaned f always moves continuously from the support portion 52 toward the free end 32t of the pair of rotating cleaning bodies 32. When viewed from the pair of rotating cleaning bodies 32, the pair of rotating cleaning bodies 32 rotate in a direction that gives the illusion that the spiral drawn by the cleaning member 82 of the left rotating cleaning body 32L and the spiral drawn by the cleaning member 82 of the right rotating cleaning body 32R are moving away from each other around the support portion 52. Therefore, the contact point between the spiral cleaning member 82 of the left rotating cleaning body 32L and the surface to be cleaned f and the contact point between the spiral cleaning member 82 of the right rotating cleaning body 32R and the surface to be cleaned move away from each other around the support portion 52 as the pair of rotating cleaning bodies 32 rotate.

[0093] Therefore, the thread-like dust wound around the pair of rotating cleaning bodies 32 is constantly exposed to a force that sends it out from the support parts 52 to the free ends 32t of the pair of rotating cleaning bodies 32. Although it is a common example, when trying to pull out a thread wound around a finger toward the tip of the finger, a force similar to the force acting on the thread wound around the finger acts on the thread-like dust wound around the pair of rotating cleaning bodies 32. Even if part of the thread-like dust winds around the pair of rotating cleaning bodies 32 due to this force, the thread-like dust will break away and slip out of the pair of rotating cleaning bodies 32.

[0094] If the thread-like dust wrapped around the rotating cleaning body 32 were to gather at the support end 32r of the rotating cleaning body 32, it would become caught between the support part 52 and the rotating cleaning body 32, which could impede the rotation of the rotating cleaning body 32. The rotating cleaning body 32 of the suction port body 18 according to this embodiment sends the wrapped thread-like dust out to the free end 32t, so that the rotation is not impeded by the wrapped thread-like dust.

[0095] Then, the thread-like dust that has escaped from each of the rotating cleaning bodies 32 is quickly sucked into the dust collection recess 62 extending near the free end 32t of each of the rotating cleaning bodies 32. In other words, the suction port body 18 according to this embodiment not only discharges the thread-like dust wound around the rotating cleaning body 32 from the free end 32t of the rotating cleaning body 32, but also quickly sucks it in and collects it.

[0096] FIG. 8 is a cross-sectional view of the suction port body according to the embodiment of the present invention taken along line VIII-VIII in FIG.

[0097] FIG. 9 is a perspective cross-sectional view of a suction port body according to an embodiment of the present invention.

[0098] FIG. 10 is a cross-sectional view of the rotary cleaning body and the connecting mechanism according to the embodiment of the present invention.

[0099] FIG. 11 is a perspective view of a coupling mechanism according to an embodiment of the present invention.

[0100] FIG. 12 is a perspective view of a protrusion of a connecting mechanism according to an embodiment of the present invention.

[0101] FIG. 13 is a perspective view of a recess of a coupling mechanism according to an embodiment of the present invention.

[0102] FIG. 14 is a perspective view of a decoupling body of the coupling mechanism according to the embodiment of the present invention.

[0103] 8 to 14, the suction port body 18 according to this embodiment includes a pair of rotating cleaning bodies 32, a support part 52 that rotatably supports the rotating cleaning bodies 32 in a cantilevered manner, and a connecting mechanism 89 that detachably connects the pair of rotating cleaning bodies 32 and the support part 52. Therefore, a user can remove the rotating cleaning bodies 32 from the suction port body 18 for maintenance, and then attach the maintained rotating cleaning body 32 to the suction port body 18.

[0104] Each of the pair of rotary cleaning bodies 32 has a cylindrical shaft core portion 81 having a cavity 32c. The support end of the shaft core portion 81 is also the support end 32r of the rotary cleaning body 32, the free end of the shaft core portion 81 is also the free end 32t of the rotary cleaning body 32, and the cavity 32c of the shaft core portion 81 is also the cavity 32c of the rotary cleaning body 32.

[0105] The support portion 52 includes a bearing housing 85, a bearing 91 held by the bearing housing 85 and the lower case 45, a support shaft base 92 supported by the bearing 91 which is rotatably supported by the bearing 91, and a pair of support shaft portions 93 which rotate integrally with the support shaft base 92 and are rotatably connected to each of a pair of rotating cleaning bodies 32.

[0106] The bearing 91 is held by being sandwiched between the bearing housing 85 and the lower case 45 .

[0107] Each of the pair of support shafts 93 is inserted into the cavity 32c of the shaft core 81 from the support end 32r side and connected to the rotary cleaning body 32. The pair of support shafts 93 extend in a straight line along the rotation center line Cr of the rotary cleaning body 32. The pair of support shafts 93 includes a left support shaft 93L inserted into the shaft core 81 of the left rotary cleaning body 32L and a right support shaft 93R inserted into the shaft core 81 of the right rotary cleaning body 32R. The left support shaft 93L and the right support shaft 93R rotate together in the same direction. The pair of support shafts 93 and the support shaft base 92 are preferably integrally molded products, and preferably have a metallic shaft core or are integrally molded products so as to easily obtain sufficient strength to cantilever-support the rotary cleaning body 32.

[0108] The connecting mechanism 89 detachably connects each of the pair of rotating cleaning bodies 32 to the support portion 52. The connecting mechanism 89 includes a recess 95 that is integrally provided with the support portion 52, and a protrusion 96 that is provided in the cavity 32c of the shaft core portion 81. The protrusion 96 and the recess 95 hook together in a releasable manner, thereby preventing the rotating cleaning bodies 32 from moving away from the support portion 52, that is, preventing the support shaft portion 93 from slipping out of the cavity 32c of the shaft core portion 81.

[0109] The recess 95 is provided at the tip of the support shaft portion 93. The recess 95 is a step that appears due to an umbrella-shaped portion provided at the free end of the support shaft portion 93, and has an appropriate shape that catches the protrusion 96 so as not to slip out in a direction away from the support shaft portion 93. The recess 95 is disposed from the support end 32r into the cavity 32c.

[0110] The protrusion 96 is provided at the tip of a cantilever-like arm 98 that extends from a sleeve-like base 97 arranged on the support end 32r side of the cavity 32c of the shaft core portion 81 toward the back of the cavity 32c, that is, toward the free end 32t. The protrusion 96 protrudes toward the radially inward direction of the base 97. The arm 98 can bend at least toward the radially outward direction of the base 97. By bending the arm 98 toward the radially outward direction of the base 97, the protrusion 96 that hooks into the recess 95 can come out of the recess 95 so as to approach the inner circumferential surface of the shaft core portion 81. In addition, by bending the arm 98 toward the radially outward direction of the base 97, the protrusion 96 that advances toward the recess 95 inside the cavity 32c of the shaft core portion 81 can be hooked into the recess 95. When the protrusion 96 and the recess 95 engage with each other, the recess 95 and the protrusion 96 have inclined surfaces that, when they come into contact with each other, deflect the arm 98 radially outward from the base 97. The inclined surface of the protrusion 96 faces the base side of the arm 98, and the inclined surface of the recess 95 faces the protruding end of the support shaft portion 93.

[0111] It is preferable that there are a plurality of protrusions 96. In other words, it is preferable that there are a plurality of arms 98 on which the protrusions 96 are provided. It is preferable that the plurality of arms 98 are aligned in a ring shape. The arms 98 aligned in a ring shape hook the plurality of protrusions 96 aligned in a ring shape into the recesses 95. The plurality of protrusions 96 aligned in a ring shape and hooked into the recesses 95 can evenly distribute and firmly receive the force acting on the support shaft portion 93 in the direction of coming out of the shaft core portion 81.

[0112] The recess 95 may be provided in the cavity 32c of the shaft core portion 81, and the protrusion 96 may be provided integrally with the support portion 52. In other words, the connecting mechanism 89 may include a recess 95 and a protrusion 96, one of which is provided integrally with the support portion 52 and the other of which is provided in the cavity 32c of the shaft core portion 81, which engage with each other so as to be able to release the engagement and prevent the rotating cleaning body 32 from being separated from the support portion 52. Also, it is sufficient that either the recess 95 or the protrusion 96 provided integrally with the support portion 52 can be positioned in the cavity 32c of the shaft core portion 81 from the support end 32r.

[0113] The connecting mechanism 89 is also provided with a decoupling body 101 that is disposed in the cavity 32c of the axial core portion 81 and that releases the engagement between the recess 95 and the protrusion 96 when pushed from the free end 32t toward the support end 32r, and a retaining force generating portion 102 that generates a force to move the decoupling body 101 in the direction from the support end 32r toward the free end 32t, thereby maintaining the engagement between the recess 95 and the protrusion 96.

[0114] The decoupling body 101 is disposed inside the cavity 32c and on the back side of the free end 32t. The rotary cleaning body 32 can be used near a wall connected to the surface to be cleaned f or near furniture installed on the surface to be cleaned f. Since the free end 32t is close to the left and right ends of the suction port body 18, if the decoupling body 101 is exposed to the outside of the rotary cleaning body 32, there is a risk that the decoupling body 101 may come into contact with an obstacle such as a wall or furniture. If the decoupling body 101 comes into contact with an obstacle and is pushed in, the connection between the rotary cleaning body 32 and the support part 52 by the connection mechanism 89 is suddenly released. This may cause the rotary cleaning body 32 to fall off. Therefore, by disposing the decoupling body 101 inside the cavity 32c and on the back side of the free end 32t, it is possible to avoid unexpected decoupling between the rotary cleaning body 32 and the support part 52. In other words, unexpected detachment of the rotary cleaning body 32 is avoided.

[0115] The decoupling body 101 has an inclined surface 105 that can bend the arm 98 having the convex portion 96 in a direction approaching the inner surface of the shaft core portion 81, and a rod portion 106 of an appropriate length that extends from the free end 32t to the tip of the arm 98.

[0116] When the decoupling body 101 is pushed from the free end 32t toward the support end 32r, the inclined surface 105 comes into contact with the tip of the arm 98 and guides it in a direction approaching the inner circumferential surface of the shaft core portion 81. There are multiple inclined surfaces 105, and they are arranged in a taper that narrows toward the tip of the decoupling body 101 so that multiple arms 98 can be deflected substantially simultaneously.

[0117] The rod portion 106 has an appropriate buckling strength so that the inclined surface 105 can be pressed against the arm 98 to bend it.

[0118] Furthermore, the connecting mechanism 89 includes a guide rod 107 and a guide hole 108, one of which is provided on the connecting / disconnecting body 101 and the other of which is provided on the support shaft portion 93 and which fit together along the rotation center line Cr of the rotating cleaning body 32. The guide rod 107 and the guide hole 108 guide the movement of the connecting / disconnecting body 101.

[0119] The holding force generating part 102 includes a coil spring 109 sandwiched between the sleeve-shaped base 97 having a convex part 96 and the disconnecting body 101, and a sleeve-shaped spring receiving part 111 that is integrally provided on the disconnecting body 101 and contacts the coil spring 109. The spring receiving part 111 is arranged to surround the convex part 96 and the concave part 95. The spring receiving part 111 has a slit-shaped opening 112 that prevents the arm 98 having the convex part 96 from bending. The number of openings 112 is the same as the number of arms 98. It is preferable that the arm 98 enters the opening 112 to an extent that bending is not hindered. The overlapping of the arm 98 and the opening 112 prevents the disconnecting body 101 from rotating around the rotation center line Cr of the rotating cleaning body 32, and the disconnecting body 101 is positioned so that the arm 98 and the non-opening part of the spring receiving part 111 overlap and the bending of the arm 98 is not hindered.

[0120] Furthermore, the connecting mechanism 89 has a second recess 115 and a second protrusion 116, one of which is integrally provided with the support portion 52 and the other of which is provided in the cavity 32c of the shaft core portion 81, which engage with each other so as to be able to release the engagement and rotate the rotary cleaning body 32 and the support portion 52 together. There are a plurality of second recesses 115 and a plurality of second protrusions 116, which are arranged in an annular shape. The second recesses 115 and the second protrusions 116 engage with each other in a key-like manner to transmit torque from the support portion 52 to the rotary cleaning body 32. The second recesses 115 and the second protrusions 116 are so-called spline shafts, spline holes, serration shafts, and serration holes. One of the second recesses 115 and the second protrusions 116, which correspond to the spline shafts and serration shafts, is arranged closer to the base of the support shaft portion 93 than the recesses 95 and the protrusions 96. A so-called key groove-shaped portion recessed toward the center line of the support shaft portion 93 may reach the tip of the support shaft portion 93 and be connected to the recess 95. Therefore, the connecting mechanism 89 supports the force that moves the rotary cleaning body 32 away from the support portion 52 by the engagement between the recess 95 and the protrusion 96, and supports the torque transmitted from the support portion 52 to the rotary cleaning body 32 by the engagement between the second recess 115 and the second protrusion 116. The division of roles makes the structures of both easy and simple, and enables the connecting mechanism 89 to be housed in the cavity 32c of the rotary cleaning body 32.

[0121] FIG. 15 is a front view of the suction port body according to the embodiment of the present invention.

[0122] As shown in Figure 15, the rear wall of the cleaning element accommodating recess 61 that defines the cleaning element chamber 63 of the suction port body 18 in this embodiment is connected to a partition portion 68 that separates the cleaning element accommodating recess 61 and the dust suction recess 62.

[0123] The lower edge of the partition 68, that is, the edge 68e of the partition 68 separating the cleaning body chamber 63 from the suction chamber 65, may be parallel and linear to the bottom surface 41b of the suction port body 41, may be close to the bottom surface 41b at the widthwise center of the suction port body 41 and far from the bottom surface 41b at both left and right ends of the suction port body 41, or may be far from the bottom surface 41b at the widthwise center of the suction port body 41 and close to the bottom surface 41b at both left and right ends of the suction port body 41. The partition 68 having the edge 68e (edge ​​68e shown by a broken line) farther from the bottom surface 41b at both left and right ends than at the widthwise center narrows the air flow at the center near the connecting pipe 42 where the negative pressure is large, and increases the air flow at both left and right ends far from the connecting pipe 42 where the negative pressure is small, thereby improving the dust removal stress at both widthwise ends of the suction port body 41, which tends to decrease in general. The partition portion 68, which has edges 68e (edges 68e shown by solid lines) that are closer to the bottom surface 41b at both left and right ends than at the center in the width direction, allows more air to flow in the center, which is close to the connecting pipe 42 and where the negative pressure effect is greater, and restricts the air flow at both left and right ends, which are far from the connecting pipe 42 and where the negative pressure effect is smaller, thereby maximizing the dust removal capacity of the center in the width direction of the suction port body 18.

[0124] FIG. 16 is a perspective view of another example of the suction port main body of the suction port body according to the embodiment of the present invention.

[0125] FIG. 17 is a cross-sectional view of another example of a suction port main body of the suction port body according to an embodiment of the present invention.

[0126] 16 and 17, the suction port body 18 according to this embodiment may have a side wall 83 that covers the free ends 32t of the pair of rotary cleaning bodies 32. The side wall 83 (hatched area in FIG. 6) that covers the free ends 32t is on an extension of the rotation center line Cr of the pair of rotary cleaning bodies 32 and has an inner wall surface 83i that faces the free ends 32t. In the example of FIG. 17, the inner wall surface 83i of the cleaning body accommodating recess 61 is separated from the free ends 32t of the rotary cleaning bodies 32 by a gap.

[0127] The side wall 83 includes a lid portion 117 that is detachably attached to the suction port body 41. When the lid portion 117 is removed from the side wall 83 of the suction port body 41, an arc-shaped edge 83e that matches the external shape of the rotating cleaning body 32 appears, as shown in Fig. 6. In other words, when the lid portion 117 is removed from the side wall 83 of the suction port body 41, the rotating cleaning body 32 can be easily attached to and detached from the suction port body 41.

[0128] Suction port body 41 is provided with holding portion 118 that holds lid portion 117 in a removable or openable / closable manner. Holding portion 118 is preferably disposed on the top or back surface of suction port body 41, avoiding the side and front surfaces of suction port body 41. Holding portion 118 may have a recess and a protrusion that are provided on lid portion 117 and suction port body 41 and hooked onto each other. Lid portion 117 may be removable by releasing the hook between the recess and protrusion of holding portion 118, or may be opened and closed like a hinge with the hook between the recess and protrusion of holding portion 118 as a fulcrum.

[0129] Next, other examples of the suction port body 18 according to this embodiment will be described. In the suction port bodies 18A, 18B, and 18C described in each example, the same components as those in the suction port body 18 of the first example are denoted by the same reference numerals, and duplicated descriptions will be omitted.

[0130] FIG. 18 is a schematic diagram showing a second example of a suction port body according to an embodiment of the present invention.

[0131] 18, a suction port body 18A of a second example according to this embodiment includes a pair of rotating cleaning bodies 32A in which, when the suction port body 41 is placed on the ground with the bottom surface 41b facing the surface to be cleaned f, the free end 32t side is pressed against the surface to be cleaned f more strongly than the support end 32r side. Each cleaning member 82A of the pair of rotating cleaning bodies 32A protrudes a long way from the bottom surface 41b of the suction port body 41 at a location closer to the free end 32t than the support end 32r of the rotating cleaning body 32A.

[0132] The pair of rotating cleaning bodies 32A of the suction port body 18A have a rotation center line Cr that extends in a straight line in the left-right direction of the suction port main body 41, similar to the pair of rotating cleaning bodies 32 of the suction port body 18 of the first example. In other words, the support part 52 of the suction port body 18A supports the pair of rotating cleaning bodies 32A on the same rotation center line Cr, similar to the support part 52 of the suction port body 18 of the first example.

[0133] Each of the pair of rotary cleaning bodies 32A has a reverse taper in which the outer diameter on the free end 32t side is larger than the outer diameter on the support end 32r side. Each of the pair of rotary cleaning bodies 32A includes a frustum-shaped shaft core portion 81A and a cleaning member 82A provided on the outer periphery of the shaft core portion 81A.

[0134] Cleaning member 82A is preferably made of brush bristles having a uniform bristle length. That is, shaft core 81A preferably has a reverse taper similar to that of rotating cleaning body 32A, and the taper angle and taper ratio of shaft core 81A are preferably the same as those of rotating cleaning body 32A.

[0135] The rotating cleaning body 32A, in which the free end 32t side is pressed against the surface to be cleaned f more strongly than the support end 32r side, increases the force acting between the cleaning member 82A and the surface to be cleaned f as it approaches the free end 32t from the support end 32r. Therefore, the force acting on the thread-like dust wrapped around the rotating cleaning body 32A to send it to the free end 32t increases as it approaches the free end 32t. Even if some of the thread-like dust winds around the rotating cleaning body 32A, the thread-like dust is guided to the free end 32t with a greater force than the suction port body 18 of the first example and is released from the rotating cleaning body 32A.

[0136] FIG. 19 is a schematic diagram showing a third example of a suction port body according to an embodiment of the present invention.

[0137] 19, a suction port body 18B of a third example according to this embodiment includes a pair of rotating cleaning bodies 32B in which, when the suction port body 41 is placed on the ground with the bottom surface 41b facing the surface to be cleaned f, the free end 32t side is pressed against the surface to be cleaned f more strongly than the support end 32r side. Each cleaning member 82B of the pair of rotating cleaning bodies 32B protrudes further from the bottom surface 41b of the suction port body 41 at a location closer to the free end 32t than the support end 32r.

[0138] The pair of rotating cleaning bodies 32B of the suction port body 18B have a rotation center line Cr that extends in a straight line in the left-right direction of the suction port main body 41, similar to the pair of rotating cleaning bodies 32 of the suction port body 18 of the first example. In other words, the support part 52 of the suction port body 18B supports the pair of rotating cleaning bodies 32B on the same rotation center line Cr, similar to the support part 52 of the suction port body 18 of the first example.

[0139] Each of the pair of rotary cleaning bodies 32B has a reverse taper in which the outer diameter on the free end 32t side is larger than the outer diameter on the support end 32r side. Each of the pair of rotary cleaning bodies 32B includes a cylindrical shaft core portion 81B and a cleaning member 82B provided on the outer periphery of the shaft core portion 81B.

[0140] The shaft core portion 81B preferably has a cylindrical shape with a uniform outer diameter, similar to the shaft core portion 81 of the first example. In other words, the cleaning member 82B has short brush bristles on the support end 32r side and long brush bristles on the free end 32t side, forming a reverse taper of the rotating cleaning body 32B. Therefore, the taper angle and taper ratio of the cleaning member 82B are the same as those of the rotating cleaning body 32A. The taper of the cleaning member 82B can be adjusted by planting long brush bristles in advance in the shaft core portion 81B and cutting them.

[0141] The rotating cleaning body 32B, in which the free end 32t side is pressed against the surface to be cleaned f more strongly than the support end 32r side, increases the force acting between the cleaning member 82B and the surface to be cleaned f as it approaches the free end 32t from the support end 32r. Therefore, the force acting on the thread-like dust wrapped around the rotating cleaning body 32B to send it to the free end 32t increases as it approaches the free end 32t. Even if some of the thread-like dust winds around the rotating cleaning body 32B, the thread-like dust is guided to the free end 32t by a force greater than that of the suction port body 18 of the first example and is released from the rotating cleaning body 32B.

[0142] FIG. 20 is a schematic diagram showing a fourth example of a suction port body according to an embodiment of the present invention.

[0143] 20, a suction port body 18C of a fourth example according to this embodiment includes a pair of rotating cleaning bodies 32 in which, when the suction port body 41 is placed on the ground with the bottom surface 41b facing the surface to be cleaned f, the free end 32t side is pressed against the surface to be cleaned f more strongly than the support end 32r side. The cleaning members 82 of each of the pair of rotating cleaning bodies 32 protrude further from the bottom surface 41b of the suction port body 41 at a location closer to the free end 32t than the support end 32r.

[0144] Unlike the support part 52 of the suction port body 18 of the first example, the support part 52C of the suction port body 18C supports the pair of rotating cleaning bodies 32 at an angle. The support part 52C supports the pair of rotating cleaning bodies 32 so that the free ends 32t of the pair of rotating cleaning bodies 32 are closer to the surface to be cleaned f than the support ends 32r of the pair of rotating cleaning bodies 32.

[0145] Therefore, the pair of rotating cleaning bodies 32A of the suction port body 18C have a pair of intersecting rotation center lines Cr, unlike the pair of rotating cleaning bodies 32 of the suction port body 18 of the first example. In other words, the support part 52C of the suction port body 18C supports the pair of rotating cleaning bodies 32 on a pair of intersecting rotation center lines Cr, unlike the support part 52 of the suction port body 18 of the first example.

[0146] The support portion 52C includes a universal joint 121 that connects the pair of support shaft portions 93 so that the pair of support shaft portions 93 can rotate together even when the pair of support shaft portions 93 are inclined relative to each other. The support portion 52C may include a bellows or a coil spring that can follow the inclination of the pair of support shaft portions 93 instead of the universal joint 121.

[0147] The support portion 52C further includes a pair of support shaft bases 92 provided on the pair of support shaft portions 93, respectively, and a pair of bearings 91 that rotatably support the pair of support shaft bases 92, respectively.

[0148] Since the suction port body 18C has a pair of rotating cleaning bodies 32 arranged in an inverted V shape, it is preferable to have a cleaning body accommodating recess 61C that defines a cleaning body chamber 63 that is inverted V-shaped like the pair of rotating cleaning bodies 32.

[0149] The rotary cleaning body 32, in which the free end 32t side is pressed against the surface to be cleaned f more strongly than the support end 32r side, increases the force acting between the cleaning member 82 and the surface to be cleaned f as it approaches the free end 32t from the support end 32r. Therefore, the force acting on the thread-like dust wrapped around the rotary cleaning body 32 to send it to the free end 32t of the rotary cleaning body 32 increases as it approaches the free end 32t. Even if some of the thread-like dust winds around the rotary cleaning body 32, the thread-like dust is guided to the free end 32t of the rotary cleaning body 32 with a greater force than the suction port body 18 of the first example and is released from the rotary cleaning body 32.

[0150] As described above, the suction port bodies 18, 18A, 18B, 18C and the vacuum cleaner 1 according to the present embodiment are provided with the rotating cleaning bodies 32, 32A, 32B having the cleaning members 82, 82A, 82B arranged such that the support end 32r side precedes the free end 32t side in the direction of rotation. Therefore, when thread-like dust is wrapped around the rotating cleaning body 32, the suction port bodies 18, 18A, 18B, 18C and the vacuum cleaner 1 can guide the dust to the free end 32t of the rotating cleaning body 32 and discharge it. Therefore, the suction port bodies 18, 18A, 18B, 18C and the vacuum cleaner 1 do not require the user to bother to remove the dust wrapped around the rotating cleaning body 32, and the rotation of the rotating cleaning body 32 is not hindered by the wrapped dust, providing high convenience to the user. Furthermore, suction port bodies 18, 18A, 18B, 18C and vacuum cleaner 1 do not require a structure for supporting rotating cleaning body 32 outside free end 32t of left rotating cleaning body 32L and free end 32t of right rotating cleaning body 32R in the left-right direction of suction port body 41, and do not require a mechanism for rotating rotating cleaning body 32. Therefore, suction port bodies 18, 18A, 18B, 18C and vacuum cleaner 1 can rake up dust with rotating cleaning body 32 over the entire width of suction port body 41.

[0151] Furthermore, the suction port bodies 18, 18A, 18B, 18C and the vacuum cleaner 1 according to this embodiment are provided with a coupling mechanism 89 that detachably couples the rotating cleaning bodies 32, 32A, 32B to the support parts 52, 52C. Therefore, in the case where thread-like dust accidentally gets into the boundary between the rotating cleaning bodies 32, 32A, 32B and the support part 52 and gets wrapped around the support shaft part 93, the suction port bodies 18, 18A, 18B, 18C and the vacuum cleaner 1 can easily remove the thread-like dust wrapped around the support shaft part 93 by removing the rotating cleaning bodies 32, 32A, 32B from the support parts 52, 52C.

[0152] Furthermore, the suction port bodies 18, 18A, 18B, 18C and the vacuum cleaner 1 according to this embodiment include a suction port body 41 having an inner wall surface 83i that is located on an extension line of the rotation center line Cr of the rotary cleaning bodies 32, 32A, 32B and faces away from the free ends 32t of the rotary cleaning bodies 32, 32A, 32B. The side wall 83 of the suction port body 41 having this inner wall surface 83i may be thin to the extent that it has a thickness that can prevent an obstacle from contacting the free ends 32t. Therefore, the suction port bodies 18, 18A, 18B, 18C and the vacuum cleaner 1 can rake up dust by the rotary cleaning body 32 over the entire width of the suction port body 41.

[0153] In addition, the suction port bodies 18, 18A, 18B, 18C and the vacuum cleaner 1 in this embodiment may be provided with a suction port main body 41 having a cleaning body chamber 63 in which the support portions 52, 52C and the pair of rotating cleaning bodies 32, 32A, 32B are arranged together, or the suction port main body 41 may be provided with a pair of cleaning body chambers 63 in which each of the pair of rotating cleaning bodies 32, 32A, 32B is arranged individually.

[0154] Moreover, the suction port bodies 18, 18A, 18B, 18C and the vacuum cleaner 1 according to this embodiment are provided with a suction port body 41 that is disposed behind the rotary cleaning bodies 32, 32A, 32B and disposed along the rotary cleaning bodies 32, 32A, 32B and has a dust suction recess 62 that can apply a negative pressure to suck in dust picked up by the rotary cleaning bodies 32, 32A, 32B. Then, thread-like dust that is about to wrap around the rotary cleaning bodies 32, 32A, 32B is sent to the dust suction recess 62 in a direction close to the tangent at the installation location of the rotary cleaning bodies 32, 32A, 32B and the surface to be cleaned f. Therefore, the suction port bodies 18, 18A, 18B, 18C and the vacuum cleaner 1 can prevent thread-like dust from wrapping around the rotary cleaning bodies 32, 32A, 32B.

[0155] Furthermore, the suction port bodies 18, 18A, 18B, and 18C and the vacuum cleaner 1 according to this embodiment have dust suction recesses 62 that extend to the vicinity of the free ends 32t of the pair of rotating cleaning bodies 32. Therefore, the suction port bodies 18, 18A, 18B, and 18C and the vacuum cleaner 1 can quickly suck up thread-like dust discharged from the free ends 32t of the rotating cleaning bodies 32, 32A, and 32B.

[0156] Furthermore, suction port bodies 18, 18A, 18B, 18C and vacuum cleaner 1 according to this embodiment include suction port body 41 having partition 68 that is located between cleaning body accommodating recesses 61, 61C and dust suction recess 62 and extends so as to hang down toward the bottom surface of suction port body 41. Therefore, suction port bodies 18, 18A, 18B, 18C and vacuum cleaner 1 can appropriately adjust the distribution of negative pressure acting on dust suction recess 62 in the width direction of suction port body 41.

[0157] Furthermore, suction port bodies 18, 18A, 18B, 18C and vacuum cleaner 1 according to this embodiment include partition parts 68 in which both left and right ends are farther from bottom surface 41b of suction port body 41 than the center in the width direction of suction port body 41. Therefore, suction port bodies 18, 18A, 18B, 18C and vacuum cleaner 1 can improve dust removal stress at both width direction ends of suction port body 41, which generally tends to decrease.

[0158] Furthermore, the suction port bodies 18A, 18B, 18C and the vacuum cleaner 1 according to this embodiment include the rotary cleaning bodies 32, 32A, 32B in which the free end 32t side is pressed against the surface f to be cleaned more strongly than the support end 32r side when the bottom surface 41b is placed against the surface f to be cleaned. Therefore, the suction port bodies 18A, 18B, 18C and the vacuum cleaner 1 can guide thread-like dust to the free end 32t of the rotary cleaning body 32, 32A, 32B with a greater force and separate it, compared to when the rotary cleaning body 32 is pressed against the surface f to be cleaned with a substantially uniform force from the support end 32r to the free end 32t.

[0159] Furthermore, the suction port bodies 18A, 18B and the vacuum cleaner 1 according to this embodiment include the rotating cleaning bodies 32A, 32B having a reverse taper in which the outer diameter of the free end 32t side is larger than the outer diameter of the support end 32r side. Therefore, the suction port bodies 18A, 18B and the vacuum cleaner 1 can easily press the free end 32t side of the rotating cleaning bodies 32A, 32B more strongly against the surface to be cleaned f than the support end 32r side.

[0160] Furthermore, the suction port body 18A and the vacuum cleaner 1 according to this embodiment include a rotary cleaning body 32A having a frustum-shaped shaft core portion 81 and a cleaning member 82A provided on the outer periphery of the shaft core portion 81. Therefore, the suction port body 18A and the vacuum cleaner 1 can easily press the free end 32t side of the rotary cleaning body 32A more strongly against the surface to be cleaned f than the support end 32r side by using the cleaning member 82A having a certain amount of bristles.

[0161] Furthermore, the suction port body 18B and the vacuum cleaner 1 according to this embodiment include a rotary cleaning body 32B having a cylindrical shaft core portion 81 and a cleaning member 82B provided on the outer periphery of the shaft core portion 81. Therefore, the suction port body 18B and the vacuum cleaner 1 can easily press the free end 32t side of the rotary cleaning body 32B more strongly against the surface to be cleaned f than the support end 32r side by additionally processing the cleaning member 82B having a bristles.

[0162] Furthermore, the suction port body 18C and the vacuum cleaner 1 according to this embodiment include a support portion 52C that supports the pair of rotary cleaning bodies 32 so that the free end 32t side is closer to the surface to be cleaned than the support end 32r side. Therefore, the suction port body 18C and the vacuum cleaner 1 can easily press the free end 32t side of the rotary cleaning body 32 more strongly against the surface to be cleaned than the support end 32r side by using a general rotary cleaning body 32 having a cylindrical outer shape.

[0163] Furthermore, the suction port bodies 18, 18A, 18B, 18C and the vacuum cleaner 1 according to this embodiment include a seal portion 84 provided between the suction port main body 41 and the free ends 32t of the pair of rotating cleaning bodies 32. Therefore, the suction port bodies 18, 18A, 18B, 18C and the vacuum cleaner 1 can discharge thread-like dust attempting to wrap around the rotating cleaning bodies 32, 32A, 32B, while preventing a decrease in suction negative pressure via the cleaning body accommodating recesses 61, 61C, thereby maintaining suction performance.

[0164] Furthermore, the suction port bodies 18, 18A, 18B, 18C and the vacuum cleaner 1 according to this embodiment have a gap between the suction port body 41 and the free ends 32t of the pair of rotary cleaning bodies 32 that is narrower than the gap between the suction port body 41 and a portion other than the free ends 32t of the pair of rotary cleaning bodies 32. Therefore, the suction port bodies 18, 18A, 18B, 18C and the vacuum cleaner 1 can discharge thread-like dust attempting to wrap around the rotary cleaning bodies 32, 32A, 32B, while preventing a decrease in suction negative pressure via the cleaning body accommodating recesses 61, 61C, thereby maintaining suction performance.

[0165] Therefore, according to the suction port bodies 18, 18A, 18B, 18C and the vacuum cleaner 1 of this embodiment, when thread-like dust begins to wrap around the rotating cleaning bodies 32, 32A, 32B, the thread-like dust can be discharged without becoming entangled in the rotating cleaning bodies 32, 32A, 32B.

[0166] Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, and are included in the scope of the invention and its equivalents described in the claims. [Explanation of symbols]

[0167] 1...vacuum cleaner, 11...secondary battery, 12...electric blower, 15...handle, 16...main body, 17...extension tube, 18, 18A, 18B, 18C...suction port body, 21...main body case, 21a...front part, 21b...center part, 21c...rear part, 22...dust separation and collection part, 23...main body control part, 25...suction port, 26...input part, 28...main body connection port, 29...exhaust port, 31...battery mounting part, 32, 32A, 32B...rotating cleaning body, 32L...left rotating cleaning body body, 32R...right-rotating cleaning body, 32r...support end, 32t...free end, 32c...cavity, 33...motor, 33a...output shaft, 41...suction port body, 41b...bottom surface, 41b...bottom surface, 42...connection pipe, 45...lower case, 46...upper case, 48...rotating connection pipe, 49...oscillating connection pipe, 52, 52C...support portion, 53...power transmission mechanism, 55...suction port body control portion, 61, 61C...cleaning body accommodating recess, 62...dust collection recess, 63...cleaning body chamber, 65 ...suction chamber, 68...partition section, 72...air passage narrowing pipe, 75...rotation, 76...linear cleaning body, 77...motor room, 78...machine room, 79...control room, 81, 81A, 81B...shaft core section, 82, 82A, 82B...cleaning member, 83...side wall, 83i...inner wall surface, 83e...arcuate edge, 84...seal section, 85...bearing housing, 86...drive pulley, 87...driven pulley, 88...belt, 89...connecting mechanism, 91...bearing, 92...support Shaft base, 93...support shaft portion, 93L...left support shaft portion, 93R...right support shaft portion, 95...concave portion, 96...convex portion, 97...base, 98...arm, 101...disconnecting body, 102...holding force generating portion, 105...inclined surface, 106...rod body portion, 107...guide rod, 108...guide hole, 109...coil spring, 111...spring receiving portion, 112...opening, 115...second concave portion, 116...second convex portion, 117...cover portion, 118...holding portion, 121...swivel joint.

Claims

1. The vacuum cleaner body, an electric blower housed in the vacuum cleaner body to generate negative pressure; an intake body fluidly connected to the electric blower; The suction port body is A rotating cleaning body capable of stirring up dust on a surface to be cleaned by rotating; A drive source that outputs a drive force for rotating the rotary cleaning body; A support part that supports the rotary cleaning body in a rotatable, detachable, and cantilevered manner; a suction port body that supports the rotary cleaning body via the support portion, The rotary cleaning body has a cleaning member arranged such that a support end side closer to the support portion precedes a free end side farther from the support portion in a rotational direction.

2. An electric vacuum cleaner as described in Claim 1, wherein the suction port body is located on an extension of the rotational center line of the rotating cleaning body and has an inner wall surface facing away from the free end.

3. 3. The electric vacuum cleaner according to claim 1, wherein the suction port body has a cleaning element accommodating recess that defines a cleaning element chamber in which the support portion and the rotary cleaning element are disposed.

4. 3. The electric vacuum cleaner according to claim 1, wherein the suction port body has a cleaning element accommodating recess that defines a cleaning element chamber in which the rotary cleaning element is disposed.

5. 3. The vacuum cleaner according to claim 1, wherein the suction port body is arranged behind the rotary cleaning body when viewed from the bottom, and is arranged along the rotary cleaning body, and has a dust suction recess that creates negative pressure to suck in the dust picked up by the rotary cleaning body.

6. The electric vacuum cleaner according to claim 5 , wherein the dust suction recess extends to the vicinity of the free end of the rotary cleaning body.

7. The suction port body is a cleaning body accommodating recess in which the rotating cleaning body is disposed; The electric vacuum cleaner according to claim 5 , further comprising: a partition portion that is disposed between the dust suction recess and the cleaning body accommodating recess and extends so as to hang down toward a bottom surface of the suction port body.

8. The electric vacuum cleaner according to claim 7 , wherein the partition portion is arranged so that both left and right end portions are farther from a bottom surface of the suction port body than a central portion in a width direction of the suction port body.

9. 3. The vacuum cleaner according to claim 1, wherein when the bottom surface of the suction mouth body is placed against the surface to be cleaned, the free end side of the rotary cleaning body is pressed more strongly against the surface to be cleaned than the support end side of the rotary cleaning body.

10. The electric vacuum cleaner according to claim 9, wherein the rotary cleaning body has an inverse taper such that an outer diameter on the free end side is larger than an outer diameter on the support end side.

11. The electric vacuum cleaner according to claim 10, wherein the rotary cleaning body comprises a frustum-shaped shaft core portion and the cleaning member provided on an outer periphery of the shaft core portion.

12. The electric vacuum cleaner according to claim 10, wherein the rotary cleaning body comprises a cylindrical axial core portion and the cleaning member provided on an outer periphery of the axial core portion.

13. The electric vacuum cleaner according to claim 9 , wherein the support portion supports the rotary cleaning body such that the free end side of the rotary cleaning body is closer to the surface to be cleaned than the supported end side of the rotary cleaning body.

14. The vacuum cleaner according to claim 1 or 2, further comprising a seal portion provided between the suction port body and a free end of the rotary cleaning body.

15. 3. The vacuum cleaner according to claim 1, wherein a gap between the suction port body and the free end of the rotary cleaning body is narrower than a gap between the suction port body and a portion of the rotary cleaning body other than the free end.

16. A rotating cleaning body capable of stirring up dust on a surface to be cleaned by rotating; A drive source that outputs a drive force for rotating the rotary cleaning body; A support part that supports the rotary cleaning body in a rotatable, detachable, and cantilevered manner; a suction port body that supports the rotary cleaning body via the support portion, The rotating cleaning body is a suction port body having a cleaning member arranged so that a support end side closer to the support portion precedes a free end side farther from the support portion in the direction of rotation.

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