Suction inlet body and electric vacuum cleaner

Abstract

The invention relates to a suction inlet body and an electric dust collector. When linear dust starts to wind around a rotary cleaning body, the linear dust can be discharged in a manner that the linear dust does not wind around the rotary cleaning body. The suction port body (18) is provided with: a pair of rotating cleaning bodies (32) capable of scraping dust on a surface to be cleaned by rotating; a motor (33) as a drive source for outputting a driving force for rotating the pair of rotary cleaning bodies (32); a support section (52) that is sandwiched between the pair of rotary cleaning bodies (32) and rotatably supports the pair of rotary cleaning bodies (3) (2) in a cantilever shape; and a power transmission mechanism (53) that transmits a driving force from the motor (33) to the support part (52) to rotate the pair of rotary cleaning bodies (32), the pair of rotary cleaning bodies (32) having a cleaning member (82) disposed such that the support end (32r) side is located in front of the free end (32t) side in the rotation direction.

Description

Technical Field

[0001] Embodiments of the present invention relate to a suction nozzle and an electric vacuum cleaner. Background Art

[0002] There is known a suction tool for an electric vacuum cleaner equipped with an agitator, the agitator having a roughly columnar central component and strip-shaped blades for scraping dust arranged in a roughly V-shape along the length direction of the surface of the central component. The V-shaped valley of the blade is arranged in the central part of the agitator close to the suction port. The suction tool for an electric vacuum cleaner rotates the agitator in such a way that both ends of the blade approach the suction port side before the V-shaped valley. As a result, the suction tool for an electric vacuum cleaner sequentially scrapes dust on the floor surface from both ends of the strip-shaped blade to the V-shaped valley side of the blade. The scraped dust is efficiently sucked by the suction port.

[0003] Patent Document 1: Japanese Patent Application Laid-Open No. 10-033424

[0004] The agitator of the conventional suction nozzle guides the 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 more likely to be entangled in the agitator, and the thread-like dust entangled in the V-shaped valley of the blade will be entangled in the agitator. The thread-like dust entangled in the agitator will not be removed from the agitator naturally. In order to remove it, the user must use a tool such as scissors to cut and remove the thread-like dust. That is, in the conventional suction nozzle, the thread-like dust is more likely to be entangled in the agitator, and the convenience is lacking. Summary of the invention

[0005] Therefore, an object of the present invention is to provide a suction port and a vacuum cleaner, which can discharge the thread-like dust without entanglement with the rotating cleaning body when the thread-like dust begins to be wound around the rotating cleaning body.

[0006] In order to solve the above-mentioned problem, the suction port body involved in the embodiment of the present invention comprises: a pair of rotating cleaning bodies, which can scrape dust on the dusted surface by rotating; a driving source, which outputs a driving force for rotating the pair of rotating cleaning bodies; a supporting part, which is clamped by the pair of rotating cleaning bodies and supports the pair of rotating cleaning bodies in a rotatable and cantilevered manner; and a power transmission mechanism, which transmits the driving force from the driving source to the supporting part to rotate the pair of rotating cleaning bodies, and the pair of rotating cleaning bodies have a cleaning component, which is configured so that the side of the supporting end close to the supporting part is located in front of the side of the free end away from the supporting part in the rotation direction.

[0007] Moreover, the electric vacuum cleaner according to the embodiment of the present invention includes: a vacuum cleaner body; an electric blower that is accommodated in the vacuum cleaner body and generates negative pressure; and the suction port body that is fluidically connected to the electric blower.

[0008] Effect of the invention: According to the suction port body and the electric vacuum cleaner of the present invention, when the linear dust begins to be wound around the rotating cleaning body, the linear dust can be discharged in a manner that the linear dust is not entangled with the rotating cleaning body, so that the linear dust wrapped around the agitator is naturally removed from the agitator, thereby improving the convenience for users when using. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a perspective view of the electric vacuum cleaner according to the embodiment of the present invention.

[0010] Figure 2 It is a perspective view of the suction port body involved in the embodiment of the present invention.

[0011] Figure 3 It is a perspective view of the suction port body involved in the embodiment of the present invention.

[0012] Figure 4 It is a top view of the suction port body involved in the embodiment of the present invention.

[0013] Figure 5 It is a bottom view of the suction port body involved in the embodiment of the present invention.

[0014] Figure 6 This is a perspective view of the suction port body according to the embodiment of the present invention as viewed from below.

[0015] Figure 7 It is a cross-sectional view of a suction port body according to an embodiment of the present invention.

[0016] Figure 8 It is a cross-sectional view of a suction port body according to an embodiment of the present invention.

[0017] Fig. 9 It is a three-dimensional cross-sectional view of the suction port body involved in the embodiment of the present invention.

[0018] Fig.10 It is a cross-sectional view of a rotary cleaning element and a connecting mechanism according to an embodiment of the present invention.

[0019] Fig.11 It is a perspective view of a connection mechanism according to an embodiment of the present invention.

[0020] Fig.12 It is a perspective view of a convex portion of a connection mechanism according to an embodiment of the present invention.

[0021] Fig.13 It is a perspective view of a recessed portion of a connection mechanism according to an embodiment of the present invention.

[0022] Fig.14 It is a perspective view of a connection release body of a connection mechanism according to an embodiment of the present invention.

[0023] Fig.15 It is a front view of the suction port body involved in the embodiment of the present invention.

[0024] Fig.16 It 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.

[0025] Fig.17 It is a cross-sectional view of another example of the suction port main body of the suction port body according to the embodiment of the present invention.

[0026] Fig.18 It is a schematic diagram showing a second example of the suction port body involved in the embodiment of the present invention.

[0027] Fig.19 It is a schematic diagram showing a third example of the suction port body involved in the embodiment of the present invention.

[0028] Fig. 20 It is a schematic diagram showing a fourth example of the suction port body involved in the embodiment of the present invention.

[0029] Description of Reference Numerals

[0030] 1…Electric vacuum cleaner, 11…Secondary battery, 12…Electric blower, 15…Handle, 16…Main body, 17…Extension tube, 18, 18A, 18B, 18C…Suction port, 21…Main body shell, 21a…Front part, 21b…Central part, 21c…Rear part, 22…Dust separation and dust 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, 32R...right-rotating cleaning body, 32r...support end, 32t...free end, 32c...hollow, 33...motor, 33a...output shaft, 41...suction port body, 41b...bottom surface, 41b...bottom surface, 42...connecting pipe, 45...lower shell, 46...upper shell, 48...rotating connecting pipe, 49...swinging connecting pipe, 52, 52C...support part, 53...power transmission mechanism, 55...suction port body control part, 61, 61C...cleaning body storage recess, 62...dust suction recess, 63... Cleaning element chamber, 65 ... suction chamber, 68 ... partition, 72 ... narrow air passage pipe, 75 ... roller, 76 ... linear cleaning element, 77 ... motor chamber, 78 ... machine chamber, 79 ... control chamber, 81, 81A, 81B ... shaft core, 82, 82A, 82B ... cleaning member, 83 ... side wall, 83i ... inner wall surface, 83e ... arc-shaped edge, 84 ... sealing portion, 85 ... bearing box, 86 ... driving pulley, 87 ... driven pulley, 88 ... belt, 89 ... connecting mechanism, 91 ... bearing, 92 ... supporting shaft base, 93…support shaft portion, 93L…left support shaft portion, 93R…right support shaft portion, 95…recessed portion, 96…convex portion, 97…base, 98…arm, 101…connection release body, 102…holding force generating portion, 105…inclined surface, 106…rod body portion, 107…guide rod, 108…guide hole, 109…coil spring, 111…spring seat portion, 112…opening portion, 115…second recessed portion, 116…second convex portion, 117…cover portion, 118…holding portion, 121…universal joint. DETAILED DESCRIPTION

[0031] Reference Figures 1 to 20 Embodiments of a suction port body and an electric vacuum cleaner according to the present invention will be described.

[0032] Figure 1 It is a perspective view of the electric vacuum cleaner according to the embodiment of the present invention.

[0033] like Figure 1 As shown, the electric vacuum cleaner 1 according to this embodiment includes a load driven by power stored in a secondary battery 11, such as an electric blower 12. The secondary battery 11 is also called a storage battery, a rechargeable battery, or a rechargeable battery. The electric vacuum cleaner 1 is, for example, a stick-type electric vacuum cleaner 1.

[0034] The vacuum cleaner 1 may be a horizontal type, an upright type, or a handheld type. The vacuum cleaner 1 may be a cordless type including a secondary battery 11 as a power source, or a wired type that obtains power from a commercial AC power source via a power cord.

[0035] The electric vacuum cleaner 1 includes a main body 16 having a handle 15 and operable by hand, a secondary battery 11 detachable from the main body 16 , an extension tube 17 connected to the main body 16 , and a suction port 18 connected to the extension tube 17 .

[0036] The main body 16 comprises: a main body shell 21 having a handle 15; an electric blower 12 housed in the main body shell 21 to generate suction negative pressure; a dust separation and dust collection unit 22 detachably provided in the main body shell 21; and a main body control unit 23 that mainly controls the driving of the electric blower 12 and the charging and discharging of the secondary battery 11.

[0037] The main body 16 drives the electric blower 12 by the power stored in the secondary battery 11, and generates negative pressure by driving the electric blower 12, so that the generated negative suction pressure acts on the dust separation dust collection part 22. The negative suction pressure acting on the dust separation dust collection part 22 acts on the extension pipe 17 and the suction port body 18 in turn. The negative suction pressure reaching the suction port body 18 acts on the suction port 25 of the suction port body 18. The negative suction pressure acting on the suction port 25 sucks the air containing dust (hereinafter referred to as "dust-containing air") from the floor surface into the suction port 25. The dust-containing air sucked into the suction port 25 flows into the dust separation dust collection part 22 through the suction port body 18 and the extension pipe 17. The dust separation dust collection part 22 separates dust from the dust-containing air sucked in by the negative suction pressure, captures and accumulates the separated dust, and the air after the dust is separated is transported to the electric blower 12. The electric blower 12 exhausts the air from which the dust has been separated to the outside of the main body casing 21 .

[0038] Furthermore, the main body 16 includes an input unit 26 , and the input unit 26 is disposed within a range within which a user who grips the handle 15 can move his fingers.

[0039] The main body shell 21 comprises: a columnar front portion 21a which is arranged on the extension line of the extension tube 17 and extends along the extension line of the extension tube 17; a central portion 21b which hangs down obliquely rearward from the front portion 21a; a cylindrical rear portion 21c which extends rearward from the lower half of the back side of the central portion 21b; and a handle 15 which extends rearward from the upper half of the back side of the central portion 21b, is bent into an arc shape and is connected to the rear end of the upper surface of the rear portion 21c.

[0040] The front portion 21a and the central portion 21b of the main body shell 21 cooperate to keep the dust separation dust collecting portion 22 detachable. The dust separation dust collecting portion 22 has a cylindrical appearance as a whole. The front portion 21a and the central portion 21b keep the dust separation dust collecting portion 22 parallel to the center line C of the dust separation dust collecting portion 22, in other words, the extension line of the center line of the extension pipe 17 in the length direction. When the extension pipe 17 and the dust separation dust collecting portion 22 are installed in the main body shell 21, the extension line of the center line of the extension pipe 17 and the center line C of the dust separation dust collecting portion 22 are arranged on a central longitudinal section that substantially evenly breaks the left and right sides of the main body shell 21. That is, the long strip-shaped front portion 21a and the cylindrical dust separation dust collecting portion 22 are arranged side by side in a manner parallel to the center line.

[0041] The front portion 21a of the main body housing 21 is arranged on the extension line of the length direction of the extension pipe 17, that is, the extension direction, and extends in a tubular shape. The front portion 21a has a joint structure that enables the extension pipe 17 to be detached. The front portion 21a has a main body connection port 28, which is an inlet of the fluid of the main body 16, and fluidically connects the extension pipe 17 to the dust separation and dust collection unit 22. By removing the extension pipe 17 from the main body 16, the main body connection port 28 can also function as a suction port when the main body 16 is used as a single body.

[0042] The rear portion 21c of the main body case 21 accommodates the electric blower 12 and the main body control unit 23. The rear portion 21c has an exhaust port 29 for exhausting the exhaust gas of the electric blower 12 from the main body case 21. A battery mounting portion 31 for detachably attaching and detaching the secondary battery 11 is provided at the bottom of the rear portion 21c.

[0043] The central portion 21b of the main body case 21 holds a portion of the rear end of the dust separation dust collection section 22 arranged in parallel with the front portion 21a in a covered manner, and houses an air passage connecting the dust separation dust collection section 22 with the electric blower 12. The central portion 21b is connected to the rear end of the front portion 21a extending substantially in a straight line and bulges obliquely downwardly toward the rear of the main body case 21. The central portion 21b has an appearance of being inclined downwardly toward the rear of the main body case 21.

[0044] The handle 15 is integrally provided on the main body housing 21. The handle 15 is a portion that the user holds by hand in order to vacuum the floor surface with the electric vacuum cleaner 1. Therefore, the handle 15 preferably has an appropriate shape that is easily held by human fingers.

[0045] The handle 15 is provided between the front portion 21a and the rear portion 21c of the main body shell 21. The handle 15 extends from the rear end of the front portion 21a in the extension direction of the extension tube 17, and is bent into an arc shape and connected to the rear end of the rear portion 21c. A continuous space is provided in the left-right direction (width direction) of the main body shell 21 between the handle 15 and the back surface of the central portion 21b of the main body shell 21, and between the handle 15 and the top surface of the rear portion 21c of the main body shell 21. The fingers of the user holding the handle 15, mainly the four fingers of the index finger, middle finger, ring finger and little finger, are arranged in this space.

[0046] The input unit 26 is provided near the handle 15 and is within the range that the user holding the handle 15 can move his fingers. The input unit 26 includes a switch for receiving an operation request of the electric blower 12. The switch is electrically connected to the main body control unit 23. The user of the electric vacuum cleaner 1 can operate the input unit 26 to alternately switch the operation and stop of the electric blower 12.

[0047] The input unit 26 may also include a switch for switching the operation mode of the electric blower 12. In this case, the main control unit 23 switches the operation mode to strong → medium → weak → strong → medium → weak → ... ... in sequence every time it receives an operation signal from the operation mode switching switch. In addition, the input unit 26 may also include a strong operation switch, a medium operation switch, and a weak operation switch instead of the operation mode switching switch.

[0048] The dust separation dust collection unit 22 is arranged in an L-shaped storage space formed by the front portion 21a of the main body shell 21 and the central portion 21b of the main body shell 21. The dust separation dust collection unit 22 separates, captures, and accumulates dust from the dust-laden air flowing into the main body 16, and on the other hand, conveys the clean air from which the dust has been removed to the electric blower 12. The dust separation dust collection unit 22 is a centrifugal separation method that centrifugally separates dust from air by utilizing the mass difference between dust and air. A filter of a filtration separation method that filters out dust from the dust-laden air may also be provided on the downstream side of the dust separation dust collection unit 22.

[0049] In addition, the dust separation dust collection part 22 extends in a cylindrical shape along the front-to-back direction of the main body shell 21. In other words, the dust separation dust collection part 22 is a cylindrical container having a center line C extending along the front-to-back direction of the main body shell 21. The direction along the center line C of the dust separation dust collection part 22, the extension direction of the dust separation dust collection part 22, and the length direction of the dust separation dust collection part 22 are substantially the same meaning and are substantially consistent with the front-to-back direction of the main body shell 21. Therefore, the center line C of the dust separation dust collection part 22 is substantially parallel to the center line of the extension pipe 17. In addition, the dust separation dust collection part 22 is arranged in parallel with the front part 21a of the main body shell 21. That is, the length direction of the dust separation dust collection part 22 imitates the length direction of the front part 21a of the main body shell 21. The diameter of the dust separation dust collection part 22 is larger than the width dimension of the front part 21a of the main body shell 21, and the dust separation dust collection part 22 protrudes to the left and right direction (width direction) of the main body 16 than the front part 21a of the main body shell 21. The left-right direction (width direction) of the main body 16 corresponds to the normal direction of the central longitudinal section of the main body 16. The center line C of the cylindrical dust separation and dust collection part 22 is substantially included in the central longitudinal section of the main body 16.

[0050] The central portion 21b of the main body housing 21 is provided with a connection port fluidically connected to the exhaust side of the dust separation and dust collection portion 22, and a separation portion downstream air duct fluidically connected to the connection port and the electric blower 12. The central portion 21b includes a portion sandwiched between the dust separation and dust collection portion 22 and the rear portion 21c of the main body housing 21. The connection port and the separation portion downstream air duct are arranged at this portion.

[0051] The connection port is arranged at a position facing the front of the central portion 21b. When the dust separation dust collection unit 22 is installed in the main body shell 21, the connection port is directly opposite to the end surface of the rear side of the dust separation dust collection unit 22. Therefore, when the dust separation dust collection unit 22 is installed in the main body shell 21, the connection port is arranged on the extension line of the center line C of the dust separation dust collection unit 22.

[0052] The suction side of the electric blower 12 is connected to the dust separation and dust collection unit 22 via a connection port and a separation unit downstream air duct. The electric blower 12 inhales air from the dust separation and dust collection unit 22 to generate a suction negative pressure. The electric blower 12 includes an impeller, a motor that generates a rotational driving force of the impeller, and a rotating shaft that transmits the rotational driving force from the motor to the impeller.

[0053] The impeller is, for example, a turbofan, and has a plurality 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 wing whose airfoil or wing section changes from the leading edge to the trailing edge. The impeller is covered by a housing having an inlet.

[0054] The electric blower 12 has a cylindrical or columnar shape with the rotating shaft as the center. The center line of the rotating shaft is oriented toward the front-rear direction of the main body housing 21, and the suction port is oriented toward the front and is housed in the main body housing 21. In addition, the center line of the rotating shaft of the electric blower 12 is substantially arranged on the extension line of the center line C of the dust separation and dust collection unit 22.

[0055] The main control unit 23 is arranged directly behind the electric blower 12. The main control unit 23 includes a microprocessor and a storage device as a storage unit for storing various operation programs, parameters, etc. executed by the microprocessor. In the case of installing a control that can select the operation mode of the electric blower 12 from a plurality of operation modes, the storage device stores various settings (independent variables) related to a plurality of pre-set operation modes. The plurality of operation modes are associated with the output of the electric blower 12. Different input values ​​(input values ​​of the electric blower 12, target values ​​of current flowing in the electric blower 12) are set in each operation mode. Each operation mode is associated with an action request accepted by the input unit 26. The main control unit 23 selects an arbitrary operation mode corresponding to the action request of the input unit 26 from a plurality of pre-set operation modes, reads 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.

[0056] The input value of the electric blower 12 corresponds to the discharge amount of the secondary battery 11. The discharge amount of the secondary battery 11 is controlled according to the discharge current or discharge voltage of the secondary battery 11. It is simpler and more preferable to control the discharge amount of the secondary battery 11 according to the discharge current of the secondary battery 11.

[0057] The secondary battery 11 is a so-called battery pack. The electric blower 12 and the main 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 control unit 23 is stored in the secondary battery 11 by charging the power to the secondary battery 11. The secondary battery 11 can be detached from the main body shell 21. In other words, the electric vacuum cleaner 1 can replace and utilize a plurality of secondary batteries 11 as appropriate. In the case where the charging rate of the secondary battery 11 installed in the electric vacuum cleaner 1 is reduced, the secondary battery 11 is replaced with a fully charged secondary battery 11, so that the electric vacuum cleaner 1 can continue to operate. That is, the secondary battery 11 can also be charged while being installed in the main body shell 21, and can also be temporarily removed from the main body shell 21, installed in a charger different from the electric vacuum cleaner 1 for charging, and installed in the main body shell 21 again after charging. The electric vacuum cleaner 1 may be an electric vacuum cleaner in which the secondary battery 11 can be easily and freely replaced, or an electric vacuum cleaner in which the secondary battery 11 can be replaced such that the replacement of the secondary battery 11 requires disassembly of the main body 16 .

[0058] Extension pipe 17 and suction port 18 suck dust on the floor surface together with air by negative pressure applied from electric blower 12 and guide the dust toward main body 16 .

[0059] 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 shell 21 and the dust separation dust collection part 22. The extension tube 17 has a length that substantially reaches the floor surface when the user holds the handle 15 of the main body 16. The end of one side of the extension tube 17 has a joint structure that can be detached from the main body connection port 28 of the main body 16. The end of the other side of the extension tube 17 has a joint structure that can be detached from the suction port body 18 of the main body 16. The extension tube 17 can be retractable or have a fixed length that cannot be retracted.

[0060] The suction port body 18 can move freely or slide freely on the floor surface such as a wooden floor or a carpet, and has a suction port 25 on the bottom surface facing the floor surface in the moving state or the sliding state. In addition, the suction port body 18 has a rotating cleaning body 32 that can rotate freely and is arranged at the suction port 25, and a motor 33 that drives the rotating cleaning body 32. The end of one side of the suction port body 18 has a joint structure that can be detached from the end of the other side of the extension pipe 17. The suction port body 18 is fluidically connected to the suction side of the electric blower 12 via the extension pipe 17. The suction port body 18, the extension pipe 17, and the dust separation and dust collection unit 22 are the suction air path from the electric blower 12 to the suction port 25.

[0061] In addition, the suction port 18 may include a windmill or a turbine for driving the rotary cleaning body 32 instead of the motor 33. The windmill or the turbine is rotated by the flow of air sucked into the electric vacuum cleaner 1, and the rotary cleaning body 32 is driven.

[0062] The electric vacuum cleaner 1 is configured such that when the input unit 26 is operated in a state where the electric blower 12 is stopped, the electric blower 12 is started. When an operation mode switching switch is installed, the electric vacuum cleaner 1 first starts the electric blower 12 in a strong operation mode, and when the operation mode switching switch is operated, the operation mode of the electric blower 12 is changed to a medium operation mode, and when the operation mode switching switch is operated again, the operation mode of the electric blower 12 is changed to a weak operation mode, and the same is repeated below. The strong operation mode, the medium operation mode, and the weak operation mode are a plurality of operation modes set in advance. The input value of 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 inhales air from the dust separation dust collection unit 22, so that the dust separation dust collection unit 22 becomes a negative pressure.

[0063] The negative pressure in the dust separation dust collection part 22 acts on the suction port 25 through the main body connection port 28, the extension pipe 17, and the suction port body 18 in sequence. The electric vacuum cleaner 1 sucks the dust on the dusted surface together with the air through the negative pressure acting on the suction port 25 to vacuum the dusted surface. The dust separation dust collection part 22 separates and accumulates dust from the dust-containing air sucked by the electric vacuum cleaner 1, and on the other hand, transports the air separated from the dust-containing air to the electric blower 12. The electric blower 12 exhausts the air sucked from the dust separation dust collection part 22 to the outside of the main body 16.

[0064] Next, the suction port 18 will be described in detail.

[0065] Figure 2 It is a perspective view of the suction port body involved in the embodiment of the present invention.

[0066] like Figure 2 As shown in FIG. 1 , the air inlet body 18 according to the present embodiment includes a substantially cubic air inlet main body 41 and a connecting pipe 42 provided at the rear of the air inlet main body 41 .

[0067] In addition, the front and rear, left and right, and top and bottom of the suction opening body 18 are described based on the user of the electric vacuum cleaner 1. Figure 2 The direction of the solid arrow X in FIG. 1 is the front or forward direction of the suction port body 18, and the opposite direction is the rear or backward direction. Figure 2 The direction of the solid arrow Y in FIG. 1 is the left side of the suction port body 18, and the opposite direction is the right side. Figure 2The direction of the solid arrow Z in FIG. 1 is upward of the suction port body 18, and the opposite direction is downward. That is, Figure 2 This is a perspective view of the suction port body 18 as viewed from the front left of the user of the electric vacuum cleaner 1 .

[0068] The shape of the suction port body 41 when viewed from above is a rectangular shape having short sides in the front-to-back direction and long sides in the left-to-right direction. That is, the left-to-right dimension of the suction port body 41, i.e., the width dimension, is greater than the front-to-back dimension of the suction port body 41, i.e., the depth dimension. Generally speaking, the user moves the suction port body 18 forward so that the suction port body 18 enters the undusted dusted surface f. Therefore, the horizontally long suction port body 18 can remove dust from a wider range of the dusted surface f in one action.

[0069] The air inlet body 41 includes a lower case 45 and an upper case 46 covering the lower case 45 .

[0070] The connection pipe 42 is disposed at the rear of the suction port body 41 and is substantially in the center in the width direction. The connection pipe 42 is a so-called universal joint. The connection pipe 42 includes a rotating connection pipe 48 that can rotate relative to the suction port body 41 and a swinging connection pipe 49 that can swing relative to the rotating connection pipe 48.

[0071] The rotating 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. The center line is preferably arranged to divide the suction port body 41 into two parts.

[0072] The swing connection pipe 49 swings around a line segment perpendicular to the rotation center line of the rotation connection pipe 48 or a line segment parallel to the line segment perpendicular to the rotation center line of the rotation connection pipe 48. The free end of the swing connection pipe 49 is a joint that can be attached to and detached from the free end of the extension pipe 17.

[0073] Figure 3 It is a perspective view of the suction port body involved in the embodiment of the present invention.

[0074] Figure 4 It is a top view of the suction port body involved in the embodiment of the present invention.

[0075] Figure 5 It is a bottom view of the suction port body involved in the embodiment of the present invention.

[0076] Figure 6 This is a perspective view of the suction port body according to the embodiment of the present invention as viewed from below.

[0077] Figure 7 yes Figure 4A cross-sectional view of the suction port body according to an embodiment of the present invention taken along line VII-VII.

[0078] In addition, Figure 3 In the embodiment, the upper shell 46 is removed from the suction port body 18. Figure 6 In the embodiment, the left-hand rotating cleaning element 32L is removed from the suction port element 18 .

[0079] like Figures 3 to 7 As shown, the suction port body 18 involved in this embodiment comprises: a suction port main body 41; a pair of rotating cleaning bodies 32 that can scrape dust on the dusted surface f by rotating; a motor 33 as a driving source that outputs a driving force for rotating the pair of rotating cleaning bodies 32; a supporting portion 52 that is clamped by the pair of rotating cleaning bodies 32 and supports the pair of rotating cleaning bodies 32 so as to be rotatable on the same rotation center line Cr and is cantilevered; a power transmission mechanism 53 that transmits the driving force from the motor 33 to the supporting portion 52 to rotate the pair of rotating cleaning bodies 32; and a suction port body control portion 55 that controls the operation of the motor 33.

[0080] The suction port body 41 includes a cleaning element storage recess 61 in which a pair of rotating cleaning elements 32 are arranged, and a dust suction recess 62 capable of exerting a negative pressure to suction dust scraped from the dust suction surface f by the pair of rotating cleaning elements 32 .

[0081] The cleaning body storage recess 61 is arranged along the front edge of the suction port body 41 and covers the entire width of the suction port body 41. The cleaning body storage recess 61 divides a cleaning body chamber 63 in which the rotating cleaning body 32 can be arranged. The cleaning body chamber 63 is open toward the bottom surface 41b of the suction port body 41. The cleaning body chamber 63 allows a part of the rotating cleaning body 32 to be exposed from the bottom surface 41b of the suction port body 41 and accommodates the rotating cleaning body 32. When the bottom surface 41b is directed toward the dusted surface f and the suction port body 41 is grounded, a part of the rotating cleaning body 32 exposed to the outside of the cleaning body chamber 63 is pressed against the dusted surface f.

[0082] When the suction port body 41 is viewed from above, the dust collection recess 62 is arranged behind the cleaning body storage recess 61 and along the cleaning body storage recess 61. Therefore, when the suction port body 41 is viewed from above, the dust collection recess 62 is arranged behind the pair of rotating cleaning bodies 32 and the support portion 52 and along the pair of rotating cleaning bodies 32 and the support portion 52. The dust collection recess 62 divides the suction chamber 65 to which negative pressure can be applied through the connecting pipe 42. The suction chamber 65 is open to the bottom surface 41b of the suction port body 41. The projection surface of the dust collection recess 62 relative to the bottom surface 41b of the suction port body 41 is equivalent to the suction port 25 of the suction port body 18. The suction port 25 is not blocked by the pair of rotating cleaning bodies 32 and faces the dust collection surface f. That is, the suction chamber 65 is an open space having the suction port 25. The dust collection recess 62 is connected to the connecting pipe 42 at the central part of the width direction of the suction port body 41.

[0083] In addition, the dust collection recess 62 extends over the entire width of the suction port body 41 and reaches the left and right sides of the suction port body 41. In other words, the dust collection recess 62 extends to the vicinity of the free ends 32t of each of the pair of rotating cleaning bodies 32. That is, the suction port 25 is open toward the left and right sides of the suction port body 41. The suction port 25 is continuously open over the bottom surface 41b of the suction port body 41 and the left and right sides. Therefore, the suction port body 18 can suck in the dust on the dust collection surface f opposite to the bottom surface 41b of the suction port body 41 through the action of negative pressure over the entire width of the suction port body 41.

[0084] Moreover, the dust collection recess 62 is shallower at the position closer to the left and right sides of the suction port body 41, and deeper at the central part in the width direction of the suction port body 41. In other words, the dust collection recess 62 is inclined in a manner that the closer to the center of the suction port body 41, the deeper it is. The inclination is such that the wind path cross-sectional area of ​​the dust collection recess 62 is throttled smaller as the position is closer to the left and right sides from the central part of the suction port body 41. The inclination smoothly guides the air sucked into the suction chamber 65 extending slenderly in the width direction of the suction port body 18 to the central part of the suction chamber 65 connected to the connecting pipe 42. In addition, the inclination increases the wind speed of the air sucked into the suction chamber 65 at the position close to the left and right sides of the suction port body 41.

[0085] In addition, the suction port body 41 includes a partition 68, which is located between the cleaning body storage 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 disconnect the cleaning body storage recess 61 and the dust suction recess 62, but is divided into two chambers to such an extent that the cleaning body chamber 63 and the suction chamber 65 are connected even when the suction port body 41 is grounded with the bottom surface 41b facing the dust suction surface f. Therefore, when the rotary cleaning body 32 is rotated to scrape the dust on the dust suction surface f toward the rear of the suction port body 41, the scraped dust is effectively put into the suction chamber 65.

[0086] The cleaning body storage recess 61 and the dust collection recess 62 are provided in the lower housing 45. In addition, the suction port body 41 is provided with a narrow air passage pipe 72, which is fixed to the lower housing 45 so that the shape of the suction chamber 65 and the shape of the air passage in the connecting pipe 42 are smoothly continuous and connected. The narrow air passage pipe 72 divides the air passage that communicates the suction chamber 65 with the air passage in the connecting pipe 42.

[0087] Moreover, the suction port body 41 is provided with a plurality of rollers 75 that are grounded to the dust collection surface 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 collection recess 62 and at the left and right ends of the suction port body 41, and a roller 75 arranged at the rear center of the suction port body 41.

[0088] In addition, the suction port body 41 is provided with a linear cleaning body 76, which is arranged behind the dust collection recess 62 and extends continuously along the dust collection recess 62. The linear cleaning body 76 can be, for example, a fluffy blade or a rubber blade. The linear cleaning body 76 blocks the air flow from the rear of the suction port body 41 toward the suction port 25, thereby increasing the negative pressure of the suction port 25. The linear cleaning body 76 is sandwiched between a pair of rollers 75 arranged at the left and right ends of the suction port body 41, and is arranged along the rotating shaft of the pair of rollers 75. Therefore, even when the suction port body 41 is grounded to the dust collection surface f, the plurality of rollers 75 can ensure the distance between the bottom surface 41b of the suction port body 41 and the dust collection surface f. That is, the linear cleaning body 76 will not be crushed by the suction port body 18.

[0089] A space is defined between the lower shell 45 and the upper shell 46 of the suction port body 41. The space includes a motor room 77 for accommodating the motor 33, a machine room 78 for accommodating the power transmission mechanism 53, and a control room 79 for accommodating the suction port body control unit 55. These motor rooms 77, machine rooms 78, and control rooms 79 can be connected or disconnected. When the suction port body 41 is viewed from above, the motor room 77, machine room 78, and control room 79 are arranged at a position behind the cleaning body storage recess 61.

[0090] The machine chamber 78 is disposed between the connection pipe 42 and the cleaning element storage recess 61 in a plan view of the suction port body 41 .

[0091] When the suction port body 41 is viewed from above, the motor chamber 77 is arranged on either side of the machine chamber 78. The motor chamber 77 accommodates the cylindrical motor 33 at a position as close as possible to the cleaning body storage recess 61. That is, the bottom of the motor 33 is arranged at a position lower than the top of the cleaning body storage recess 61. In such a configuration of the motor 33 and the configuration of the motor chamber 77, even if the motor 33 is arranged at a position higher than the pair of rotating cleaning bodies 32, the height of the suction port body 41 can be suppressed to be lower than the sum of the height (diameter) of the pair of rotating cleaning bodies 32 and the height (diameter) of the motor 33.

[0092] The control chamber 79 is disposed on either side of the connection pipe 42 in a plan view of the inlet body 41. The motor chamber 77 and the control chamber 79 may be disposed on either side of the inlet body 41 or distributed on both sides.

[0093] A pair of rotating cleaning bodies 32 are rotatably arranged on the suction port body 41 via a supporting portion 52. The pair of rotating cleaning bodies 32 includes a left-rotating cleaning body 32L arranged on either side of the suction port body 41, such as the left half, and a right-rotating cleaning body 32R arranged on either side of the suction port body 41, such as the right half. The left-rotating cleaning body 32L is arranged on the left side of the supporting portion 52 (on the right side when the suction port body 41 is viewed from the front), and the right-rotating cleaning body 32R is arranged on the right side of the supporting portion 52 (on the left side when the suction port body 41 is viewed from the front). That is, the pair of rotating cleaning bodies 32 sandwich the supporting portion 52. The pair of rotating cleaning bodies 32 are respectively supported by the supporting 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 faces the width direction of the suction port body 41.

[0094] A pair of rotating cleaning bodies 32 respectively have a supporting end 32r close to the supporting portion 52, and a free end 32t away from the supporting portion 52. The supporting end 32r of the left-rotating cleaning body 32L and the supporting end 32r of the right-rotating cleaning body 32R sandwich the supporting portion 52. 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 is substantially equivalent to the entire width of the pair of rotating cleaning bodies 32. The entire width of the pair of rotating cleaning bodies 32 substantially covers the entire width of the suction port body 41. In other words, the free end 32t of the left-rotating cleaning body 32L is arranged at the left end of the suction port body 41, and the free end 32t of the right-rotating cleaning body 32R is arranged at the right end of the suction port body 41. The entire width of the pair of rotating cleaning bodies 32 may also exceed the width dimension of the suction port body 41. The free end 32t of the left-hand rotating cleaning element 32L may protrude outward from the left side wall of the suction port body 41 , and the free end 32t of the right-hand rotating cleaning element 32R may protrude outward from the right side wall of the suction port body 41 .

[0095] In addition, each of the pair of rotary cleaning bodies 32 includes a shaft core portion 81 extending from the support end 32 r to the free end 32 t , and a cleaning member 82 provided on the outer peripheral portion of the shaft core portion 81 .

[0096] The cleaning member 82 is configured so that the support end 32r of the rotary cleaning body 32 is located in front of the free end 32t in the rotation direction of the rotary cleaning body 32. The cleaning member 82 is configured to be wound in a spiral shape from the support end 32r of the rotary cleaning body 32 toward the free end 32t in imitation of the rotation of the rotary cleaning body 32. The cleaning member 82 is wound on the rotary cleaning body 32 so that when the rotary cleaning body 32 is rotated, a spiral is drawn from the support end 32r of the rotary cleaning body 32 toward the free end 32t. That is, a pair of rotary cleaning bodies 32 have a spiral cleaning member 82 extending in different directions. When viewed along the axial direction, the cleaning member 82 can be wound on the shaft core 81 for more than one cycle, that is, more than 360 degrees, or it can be wound within a range smaller than one cycle.

[0097] The cleaning component 82 has brush-like bristles and is a brush. The cleaning component 82 radially surrounds the outer periphery of the shaft core 81 and depicts a plurality of spirals. For example, the cleaning component 82 depicts 8 spirals and spirally surrounds the shaft core 81. The plurality of spirals depicted by the cleaning component 82 may all protrude from the shaft core 81 with the same length, or may have different protruding lengths. In addition, the plurality of spirals depicted by the cleaning component 82 may have the same rigidity, or may have different rigidities. The rigidity of the cleaning component 82 is also referred to as the rigidity of the hair. Moreover, the plurality of spirals depicted by the cleaning component 82 may also surround the shaft core 81 without a gap. In this case, the plurality of spirals may be distinguished based on at least one of the rigidity of the hair of the cleaning component 82, the density of the cleaning component 82, and the protruding length of the cleaning component 82.

[0098] When the free end 32t is observed from the support end 32r, the cleaning member 82 of the left-rotating cleaning body 32L is wound counterclockwise around the shaft core 81 from the support end 32r toward the free end 32t, and when the free end 32t is observed from the support end 32r, the cleaning member 82 of the right-rotating cleaning body 32R is wound clockwise around the shaft core 81 from the support end 32r toward the free end 32t. Therefore, when the left side of the suction port body 41 is observed from the support portion 52, the cleaning member 82 of the left-rotating cleaning body 32L is wound counterclockwise around the shaft core 81 from the support end 32r toward the free end 32t, and when the right side of the suction port body 41 is observed from the support portion 52, the cleaning member 82 of the right-rotating cleaning body 32R is wound clockwise around the shaft core 81 from the support end 32r toward the free end 32t.

[0099] Therefore, when a pair of rotating cleaning bodies 32 are rotated to scrape the dust on the dusted surface f toward the rear of the suction port main body 41, the contact portion between the cleaning component 82 located in front of the free end 32t on the side of the supporting end 32r of the rotating cleaning body 32 and the dusted surface f continuously moves from the portion close to the supporting end 32r of the cleaning component 82 to the portion close to the free end 32t.

[0100] The pair of rotary cleaning elements 32 may be mostly housed in the cleaning element chamber 63, or most of the cleaning members 82 may be exposed outside the cleaning element chamber 63. The exposed portion of the rotary cleaning elements 32 is preferably a portion of the front surface of the suction port body 41.

[0101] The left and right side walls 83 of the cleaning element storage recess 61 that divides the cleaning element chamber 63 may expose or cover the free ends 32t of the pair of rotating cleaning elements 32. The side wall 83 that exposes the free ends 32t only needs to have an arc-shaped edge 83e that follows the outer shape of the rotating cleaning element 32. The side wall 83 ( Figure 6The side wall 83 is located on the extension line of the rotation center line Cr of the rotating cleaning body 32 and has an inner wall surface 83i opposite to the free end 32t. The inner wall surface 83i of the cleaning body storage recess 61 can be connected to the free end 32t of the rotating cleaning body 32, or can be separated from the free end 32t of the rotating cleaning body 32 with a gap. The thinner the side wall 83 is, the more preferable it is within the limit of having a wall thickness that can prevent obstacles from contacting the free end 32t.

[0102] The gap between the suction port body 41 and the free ends 32t of a pair of rotating cleaning bodies 32 is preferably narrower than the gap between the suction port body 41 and the portion other than the free ends 32t of the pair of rotating cleaning bodies 32. At least one of the rotating cleaning body 32 and the side wall 83 preferably has a sealing portion 84 disposed between the free ends 32t of the rotating cleaning body 32 and the side wall 83. The sealing portion 84 is disposed between the suction port body 41 and the pair of rotating cleaning bodies 32. The sealing portion 84 is not a component that completely blocks the gap between the rotating cleaning body 32 and the side wall 83, but a component that does not hinder the discharge of the linear dust that escapes from the free ends 32t of the rotating cleaning body 32, such as fluffing. When the sealing portion 84 is disposed at the free ends 32t of the rotating cleaning body 32, the sealing portion 84 rotates integrally with the rotating cleaning body 32 and rotates at the same rotational speed as the cleaning component 82. The sealing portion 84 may also be disposed 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 body 41 may or may not be in contact with the rotary cleaning body 32.

[0103] The motor 33 is preferably configured so that its output shaft 33a is parallel to the rotation center line Cr of a pair of rotating cleaning bodies 32 when the suction port body 41 is viewed from above. The motor 33 is away from the left and right ends of the suction port body 41 and is configured near the central part of the width direction of the suction port body 41. The motor 33 is heavier than other components of the suction port body 18. Therefore, when the motor 33 is configured 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 connecting pipe 42, and the operability of the suction port body 18 will be reduced. By configuring the motor 33 near the central part of the width direction of the suction port body 41 as in the suction port body 18 involved in this embodiment, the center of gravity of the suction port body 18 is close to the connecting pipe 42, and the operability of the suction port body 18 is improved.

[0104] The motor 33 rotates the pair of rotary cleaning bodies 32 in a direction to collect dust on the suction surface f toward the suction port 25 when the suction port body 41 is disposed on the suction surface f. The motor 33 rotates the pair of rotary cleaning bodies 32 in a direction to assist the suction port body 18 in moving forward.

[0105] The support portion 52 is sandwiched by a pair of rotating cleaning bodies 32. The support portion 52 includes a bearing box 85 fixed to the lower shell 45 of the suction port body 41. The support portion 52 can be arranged in the cleaning body chamber 63, or the cleaning body chamber 63 can be partitioned left and right. In other words, the cleaning body storage recess 61 can be divided into a cleaning body chamber 63 for the support portion 52 and a pair of rotating cleaning bodies 32 to be arranged together, or a pair of left and right cleaning body chambers 63 for each of the pair of rotating cleaning bodies 32 to be separately arranged.

[0106] The bottom surface of the bearing box 85 is a part of the bottom surface 41b of the suction port body 41. A nonwoven fabric is preferably provided on the bottom surface of the bearing box 85. When the suction port body 41 is grounded with the bottom surface 41b facing the dusted surface f, the nonwoven fabric preferably has a hair length that is in contact with the dusted surface f. The nonwoven fabric hinders the flow of air in the gap between the bearing box 85 and the dusted surface f and increases the negative pressure of the suction chamber 65. In addition, the dust removal performance in the area between the pair of rotating cleaning bodies 32 separated by the left and right is improved. When the bottom surface of the bearing box 85 is separated from the dusted surface f, the cleaning body storage recess 61 is divided into a cleaning body chamber 63 in which the support portion 52 and the pair of rotating cleaning bodies 32 are arranged together. When the bottom surface of the bearing box 85 or the nonwoven fabric provided on the bottom surface of the bearing box 85 is close to the dust collection surface f, the cleaning element storage recess 61 defines a pair of left and right cleaning element chambers 63 in which a pair of rotating cleaning elements 32 are individually arranged.

[0107] The power transmission mechanism 53 includes: a driving pulley 86 that is integrally rotatably provided on the output shaft 33a of the motor 33; a driven pulley 87 that is integrally rotatably connected to the pair of rotating cleaning bodies 32; and a belt 88 that transmits the driving force output by the motor 33 from the driving pulley 86 to the driven pulley 87. The reduction ratio of the power transmission mechanism 53 is set so that the pair of rotating cleaning bodies 32 can be rotated by the torque that can be output by the motor 33. The power transmission mechanism 53 transmits the driving force of the motor 33 to the pair of rotating cleaning bodies 32, so that the pair of rotating cleaning bodies 32 rotate in the rotation direction that assists the advancement of the suction port body 18.

[0108] Alternatively, the 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 .

[0109] Alternatively, the support portion 52 may rotatably support the pair of rotary cleaning bodies 32 individually, and the power transmission mechanism 53 may transmit the driving force individually to the pair of rotary cleaning bodies 32. That is, the support portion 52 and the power transmission mechanism 53 may be partitioned to the left and right.

[0110] The nozzle control unit 55 operates the motor 33 using power supplied from the main body 16 through the extension tube 17 .

[0111] When the suction port body 18 is moved forward on the dusted surface f, the pair of rotating cleaning bodies 32 rotating in the direction to assist the advancement of the suction port body 18 scrapes the dust on the dusted surface f in the direction opposite to the advancing direction of the suction port body 18. That is, the pair of rotating cleaning bodies 32 rotating in the direction to assist the advancement of the suction port body 18 scrapes the dust on the dusted surface f toward the dust collection recess 62 disposed behind the cleaning body storage recess 61. The scraped dust is sucked into the narrow air passage pipe 72 by the negative pressure acting on the dust collection recess 62, and is captured by the dust separation dust collection unit 22.

[0112] Here, in the case where the dust on the dust collection surface f contains thread-like dust such as hair, the pair of rotating cleaning bodies 32 presses a portion of the thread-like dust, such as the middle portion, against the dust collection surface f, and at the same time sends a portion of the thread-like dust to the rear of the pair of rotating cleaning bodies 32. The portion of the thread-like dust sent to the rear of the pair of rotating cleaning bodies 32 is sucked in by the negative pressure acting on the dust collection recess 62. That is, the suction port body 18 involved in this embodiment is to suck in a portion of the thread-like dust that is located behind the pair of rotating cleaning bodies 32 and is not pressed by the pair of rotating cleaning bodies 32 by the negative pressure acting on the dust collection recess 62 while the middle portion of the thread-like dust is pressed against the dust collection surface f by the pair of rotating cleaning bodies 32. Thus, the suction port body 18 involved in this embodiment prevents the thread-like dust from being wound around the pair of rotating cleaning bodies 32.

[0113] However, a part of the thread-like dust not pressed by the pair of rotating cleaning elements 32 may not be carried by the air flow generated by the negative pressure acting on the dust suction recess 62 but may be wound around the pair of rotating cleaning elements 32 .

[0114] Therefore, the suction port body 18 involved in this embodiment has a spiral cleaning component 82, and the cleaning component 82 is configured so that the contact part between the pair of rotating cleaning bodies 32 and the dusted surface f moves continuously from the part close to the support end 32r to the part close to the free end 32t. The contact part between the spiral cleaning component 82 and the dusted surface f always moves continuously from the support portion 52 toward the free end 32t of the pair of rotating cleaning bodies 32. When observed in the pair of rotating cleaning bodies 32, the pair of rotating cleaning bodies 32 rotate in a direction that creates an illusion that the spiral drawn by the cleaning component 82 of the left-rotating cleaning body 32L and the spiral drawn by the cleaning component 82 of the right-rotating cleaning body 32R are moving away from each other with the support portion 52 as the center. Therefore, the contact part between the spiral cleaning component 82 of the left-rotating cleaning body 32L and the dusted surface f, and the contact part between the spiral cleaning component 82 of the right-rotating cleaning body 32R and the dusted surface f, move away from each other around the support part 52 as the pair of rotating cleaning bodies 32 rotate.

[0115] Therefore, the thread-like dust wound around the pair of rotating cleaning bodies 32 always receives the force sent from the support portion 52 to the free ends 32t of the pair of rotating cleaning bodies 32. As a common case, for example, when the thread wound around a finger is pulled toward the front end of the finger, the same force as 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. Due to this force, even if a part of the thread-like dust is wound around the pair of rotating cleaning bodies 32, the thread-like dust will be released from the pair of rotating cleaning bodies 32 and separated.

[0116] Assuming that the thread-like dust wound around the rotating cleaning body 32 gathers at the supporting end 32r of the rotating cleaning body 32, it is possible that it is sandwiched between the supporting portion 52 and the rotating cleaning body 32 and hinders the rotation of the rotating cleaning body 32. The rotating cleaning body 32 of the suction port body 18 involved in this embodiment sends the wound thread-like dust to the free end 32t, so the wound thread-like dust does not hinder the rotation.

[0117] Moreover, the thread-like dust that is separated from each rotating cleaning body 32 is quickly sucked into the dust suction recess 62 extending to the vicinity of the free end 32t of each rotating cleaning body 32. That is, the suction port body 18 involved in 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 can quickly recover it by suction.

[0118] Figure 8 yes Figure 5 A cross-sectional view of the suction port body according to an embodiment of the present invention taken along line VIII-VIII.

[0119] Fig. 9 It is a three-dimensional cross-sectional view of the suction port body involved in the embodiment of the present invention.

[0120] Fig.10 It is a cross-sectional view of a rotary cleaning element and a connecting mechanism according to an embodiment of the present invention.

[0121] Fig.11 It is a perspective view of a connection mechanism according to an embodiment of the present invention.

[0122] Fig.12 It is a perspective view of a convex portion of a connection mechanism according to an embodiment of the present invention.

[0123] Fig.13 It is a perspective view of a recessed portion of a connection mechanism according to an embodiment of the present invention.

[0124] Fig.14 It is a perspective view of a connection release body of a connection mechanism according to an embodiment of the present invention.

[0125] like Figures 8 to 14 As shown, the suction port body 18 involved in this embodiment includes: a pair of rotating cleaning bodies 32; a support portion 52 that supports the rotating cleaning bodies 32 in a rotatable and cantilevered manner; and a connecting mechanism 89 that detachably connects the pair of rotating cleaning bodies 32 and the support portion 52. Therefore, the user can remove the rotating cleaning bodies 32 from the suction port body 18 for maintenance, and install the maintained rotating cleaning bodies 32 to the suction port body 18.

[0126] The pair of rotary cleaning bodies 32 each include a cylindrical shaft core 81 having a cavity 32c. The support end of the shaft core 81 is also the support end 32r of the rotary cleaning body 32, the free end of the shaft core 81 is also the free end 32t of the rotary cleaning body 32, and the cavity 32c of the shaft core 81 is also the cavity 32c of the rotary cleaning body 32.

[0127] The support portion 52 includes: a bearing box 85; a bearing 91 held by the bearing box 85 and the lower shell 45; a support shaft base 92 supported by the bearing 91 so as to be rotatable and supported by the bearing 91; and a pair of support shafts 93 that rotate integrally with the support shaft base 92 and are connected to rotate integrally with a pair of rotating cleaning bodies 32.

[0128] The bearing 91 is held by being sandwiched between the bearing box 85 and the lower case 45 .

[0129] A pair of supporting shafts 93 are respectively inserted into the hollow 32c of the shaft core 81 from one side of the supporting end 32r and connected to the rotating cleaning body 32. A pair of supporting shafts 93 extend into a straight line along the rotation center line Cr of the rotating cleaning body 32. A pair of supporting shafts 93 include a left supporting shaft 93L inserted into the shaft core 81 of the left rotating cleaning body 32L, and a right supporting shaft 93R inserted into the shaft core 81 of the right rotating cleaning body 32R. The left supporting shaft 93L and the right supporting shaft 93R rotate integrally in the same direction. A pair of supporting shafts 93 and the supporting shaft base 92 are preferably an integrally formed product, preferably having a metal shaft core or an integrally formed product of metal in order to easily obtain sufficient strength for cantilevering the rotating cleaning body 32.

[0130] The connecting mechanism 89 connects the pair of rotating cleaning bodies 32 to the supporting part 52 in a detachable manner. The connecting mechanism 89 includes a recessed portion 95 integrally provided in the supporting part 52, and a convex portion 96 provided in the hollow 32c of the shaft core portion 81. The convex portion 96 and the recessed portion 95 are hooked with each other in a manner that can release the hooking with each other, thereby preventing the rotating cleaning body 32 from moving away from the supporting part 52, that is, the supporting shaft portion 93 from coming out of the hollow 32c of the shaft core portion 81.

[0131] The recessed portion 95 is provided at the front end of the support shaft portion 93. The recessed portion 95 is a step formed by an umbrella-shaped portion provided at the free end of the support shaft portion 93, and has an appropriate shape for hooking the protrusion 96 so as not to slip out in a direction away from the support shaft portion 93. The recessed portion 95 is arranged from the support end 32r to the cavity 32c.

[0132] The convex portion 96 is provided at the front end portion of a cantilever beam-shaped arm 98, and the arm 98 extends from a sleeve-shaped base 97 disposed on the side of the support end 32r of the hollow 32c of the shaft core portion 81 toward the deep end of the hollow 32c, that is, the free end 32t. The convex portion 96 protrudes toward the radial inner side of the base 97. The arm 98 can be bent at least toward the radial outer side of the base 97. By bending the arm 98 toward the radial outer side of the base 97, the convex portion 96 hooked with the recessed portion 95 can approach the inner peripheral surface of the shaft core portion 81 and escape from the recessed portion 95. In addition, by bending the arm 98 toward the radial outer side of the base 97, the convex portion 96 advancing toward the recessed portion 95 in the hollow 32c of the shaft core portion 81 can be hooked with the recessed portion 95. The concave portion 95 and the convex portion 96 have inclined surfaces that bend the arm 98 toward the radially outer side of the base 97 when they come into contact with each other, so that when the convex portion 96 and the concave portion 95 are hooked with each other, the arm 98 can be bent toward the radially outer side of the base 97. The inclined surface of the convex portion 96 faces the root side of the arm 98, and the inclined surface of the concave portion 95 faces the protruding end of the support shaft portion 93.

[0133] There are preferably a plurality of convex portions 96. That is, there are preferably a plurality of arms 98 provided with the convex portions 96. The plurality of arms 98 are preferably arranged in a ring shape. The arms 98 arranged in a ring shape hook the plurality of convex portions 96 arranged in a ring shape on the recessed portion 95. The plurality of convex portions 96 arranged in a ring shape hooked on the recessed portion 95 can evenly disperse and firmly receive the force acting on the support shaft portion 93 in the direction of escaping from the shaft core portion 81.

[0134] The concave portion 95 may be provided in the hollow 32c of the shaft core portion 81, and the convex portion 96 may be provided integrally in the support portion 52. That is, the connection mechanism 89 only needs to include the concave portion 95 and the convex portion 96 as follows: one of which is integrally provided in the support portion 52, and the other of which is provided in the hollow 32c of the shaft core portion 81, and the two are hooked to each other in a manner that can release the hooking to each other and prevent the rotary cleaning body 32 from being separated from the support portion 52. In addition, any one of the concave portion 95 and the convex portion 96 integrally provided in the support portion 52 only needs to be configured in the hollow 32c of the shaft core portion 81 from the support end 32r.

[0135] In addition, the connecting mechanism 89 includes: a connecting release body 101, which is arranged in the hollow 32c of the shaft core portion 81 and releases the mutual hooking of the recessed portion 95 and the protruding portion 96 when pressed from the free end 32t toward the supporting end 32r; and a retaining force generating portion 102, which generates a force to move the connecting release body 101 in the direction from the supporting end 32r toward the free end 32t, thereby maintaining the mutual hooking of the recessed portion 95 and the protruding portion 96.

[0136] The connection release body 101 is arranged inside the cavity 32c and is located inside the cavity 32c. The rotary cleaning body 32 can be used near a wall connected to the dusted surface f or furniture arranged on the dusted surface f. The free end 32t is close to the left and right ends of the suction port 18. Therefore, when the connection release body 101 is exposed to the outside of the rotary cleaning body 32, the connection release body 101 may contact obstacles such as walls and furniture. When the connection release body 101 contacts an obstacle and is pressed in, the connection between the rotary cleaning body 32 and the support part 52 by the connection mechanism 89 may be accidentally released. As a result, the rotary cleaning body 32 may fall off sometimes. Therefore, by arranging the connection release body 101 inside the cavity 32c and being located inside the free end 32t, the accidental connection release between the rotary cleaning body 32 and the support part 52 can be avoided. That is, the accidental detachment of the rotary cleaning body 32 can be avoided.

[0137] The disconnecting member 101 includes an inclined surface 105 that allows the arm 98 having the protrusion 96 to bend toward the inner peripheral surface of the shaft core 81 , and a rod body 106 of an appropriate length extending from the free end 32 t to the front end of the arm 98 .

[0138] When the coupling release body 101 is pressed from the free end 32t toward the support end 32r, the inclined surface 105 contacts the front end of the arm 98 and guides it toward the inner peripheral surface of the shaft core 81. There are a plurality of inclined surfaces 105, which are configured as tapered surfaces that taper toward the front end of the coupling release body 101 so that the plurality of arms 98 can be bent substantially simultaneously.

[0139] The rod body portion 106 has appropriate buckling strength so as to be able to press the inclined surface 105 against the arm 98 and bend it.

[0140] The connection mechanism 89 includes a guide rod 107 and a guide hole 108, one of which is provided on the connection release body 101 and the other is provided on the support shaft portion 93 and is fitted along the rotation center line Cr of the rotary cleaning body 32. The guide rod 107 and the guide hole 108 guide the movement of the connection release body 101.

[0141] The holding force generating portion 102 includes: a coil spring 109 sandwiched between a sleeve-shaped base 97 having a protrusion 96 and a connection release body 101; and a sleeve-shaped spring seat portion 111 integrally provided on the connection release body 101 and connected to the coil spring 109. The spring seat portion 111 is arranged so as to surround the protrusion 96 and the recess 95. The spring seat portion 111 has a slit-shaped opening portion 112 that avoids the bending of the arm 98 having the protrusion 96. The number of the opening portions 112 is the same as that of the arm 98. The arm 98 preferably enters the opening portion 112 within a range where the bending is not hindered. The connection release body 101 is positioned so that the overlap of the arm 98 and the opening portion 112 hinders the connection release body 101 from rotating around the rotation center line Cr of the rotating cleaning body 32, and the arm 98 overlaps with the non-opening portion of the spring seat portion 111 without hindering the bending of the arm 98.

[0142] Moreover, the connecting mechanism 89 has the following second recessed portion 115 and second convex portion 116: either one is integrally arranged in the support portion 52, and the other one is arranged in the hollow 32c of the shaft core portion 81, so that the rotating cleaning body 32 and the support portion 52 are rotated and integrated by being hooked with each other in a manner that can release the hooking with each other. There are a plurality of second recessed portions 115 and second convex portions 116, respectively, and they are arranged in an annular shape. The second recessed portion 115 and the second convex portion 116 are meshed in a key-like manner to transmit torque from the support portion 52 to the rotating cleaning body 32. The second recessed portion 115 and the second convex portion 116 are called so-called spline shafts, spline holes, fine-tooth shafts, and fine-tooth holes. One of the second recessed portion 115 and the second convex portion 116, which are equivalent to the spline shaft and the fine-tooth shaft, is arranged at a position closer to the root of the support shaft portion 93 than the recessed portion 95 and the convex portion 96. The so-called key groove-shaped portion recessed toward the center line of the support shaft portion 93 can also reach the front end of the support shaft portion 93 and be connected to the recessed portion 95. Therefore, the connection mechanism 89 supports the force that moves the rotary cleaning body 32 away from the support portion 52 by the mutual hooking of the recessed portion 95 and the convex portion 96, and supports the torque transmitted from the support portion 52 to the rotary cleaning body 32 by the mutual hooking of the second recessed portion 115 and the second convex portion 116. The sharing of these functions makes the structure of both parties easy and simple, and the connection mechanism 89 can be accommodated in the cavity 32c of the rotary cleaning body 32.

[0143] Fig.15 It is a front view of the suction port body involved in the embodiment of the present invention.

[0144] like Fig.15 As shown, the rear wall of the cleaning element storage recess 61 that defines the cleaning element chamber 63 of the suction port 18 according to the present embodiment is connected to a partition 68 that partitions the cleaning element storage recess 61 from the dust collection recess 62 .

[0145] The lower edge of the partition 68, that is, the edge 68e of the partition 68 that separates the cleaning body chamber 63 from the suction chamber 65, may be parallel to the bottom surface 41b of the suction port body 41 and be a straight line, may be close to the bottom surface 41b in the central part of the width direction of the suction port body 41 and away from the bottom surface 41b at the left and right ends of the suction port body 41, or may be away from the bottom surface 41b in the central part of the width direction of the suction port body 41 and close to the bottom surface 41b at the left and right ends of the suction port body 41. The partition 68 having the edge 68e (edge ​​68e shown by the dotted line) whose left and right ends are farther from the bottom surface 41b than the central part in the width direction throttles the flow of air in the central part close to the connecting pipe 42 where the negative pressure is greater, and increases the flow of air at the left and right ends away from the connecting pipe 42 where the negative pressure is smaller, thereby improving the dust removal stress at the two ends of the suction port body 41 in the width direction, which is generally easy to reduce. The partition portion 68 has an edge 68e (edge ​​68e shown by a solid line) whose left and right ends are closer to the bottom surface 41b than the central portion in the width direction. More air flows in the central portion close to the connecting pipe 42 where the effect of negative pressure is greater, and the flow of air is throttled at the left and right ends away from the connecting pipe 42 where the effect of negative pressure is smaller, thereby maximizing the dust removal capacity of the central portion of the suction port body 18 in the width direction.

[0146] Fig.16 It 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.

[0147] Fig.17 It is a cross-sectional view of another example of the suction port main body of the suction port body according to the embodiment of the present invention.

[0148] like Fig.16 as well as Fig.17 As shown, the suction port body 18 of this embodiment may also have a side wall 83 that covers the free end 32t of each of the pair of rotating cleaning bodies 32. Figure 6 The hatched area in FIG. 1 has an inner wall surface 83i located on the extension line of the rotation center line Cr of the pair of rotating cleaning bodies 32 and opposite to the free end 32t. Fig.17 In the example of FIG. 5 , the inner wall surface 83 i of the cleaning element storage recess 61 is spaced away from the free end 32 t of the rotary cleaning element 32 with a gap therebetween.

[0149] The side wall 83 includes a cover 117 that is detachably mounted on the suction port body 41. When the cover 117 is removed from the side wall 83 of the suction port body 41, as shown in FIG. Figure 6 As shown, the arc-shaped edge 83e appears along the outer shape of the rotary cleaning body 32. That is, when the cover 117 is removed from the side wall 83 of the suction port body 41, the rotary cleaning body 32 can be easily attached to and detached from the suction port body 41.

[0150] The inlet body 41 includes a holding portion 118 that holds the cover 117 so that it can be detached or opened and closed. The holding portion 118 is preferably arranged on the upper surface or back surface of the inlet body 41, avoiding the side and front of the inlet body 41. The holding portion 118 may also include a concave portion and a convex portion that are provided on the cover 117 and the inlet body 41 and hooked to each other. The cover 117 can be disassembled by unhooking the concave portion and the convex portion of the holding portion 118, or can be opened and closed like a hinge with the hook of the concave portion and the convex portion of the holding portion 118 as a fulcrum.

[0151] Next, another example of the suction port 18 according to the present embodiment will be described. In the suction port 18A, 18B, and 18C described in each example, the same components as those of the suction port 18 of the first example are denoted by the same reference numerals, and duplicate descriptions are omitted.

[0152] Fig.18 It is a schematic diagram showing a second example of the suction port body involved in the embodiment of the present invention.

[0153] like Fig.18 As shown, the suction port body 18A of the second example involved in this embodiment has a pair of rotating cleaning bodies 32A, and when the bottom surface 41b is directed toward the dusted surface f and the suction port body 41 is grounded, the free end 32t side of the pair of rotating cleaning bodies 32A is pressed against the dusted surface f more strongly than the support end 32r side. The cleaning parts 82A of each of the pair of rotating cleaning bodies 32A protrude longer from the bottom surface 41b of the suction port body 41 at a position closer to the free end 32t than the support end 32r of the rotating cleaning body 32A.

[0154] The pair of rotating cleaning bodies 32A of the suction port body 18A, like the pair of rotating cleaning bodies 32 of the suction port body 18 of the first example, have a rotation center line Cr extending in a straight line in the left-right direction of the suction port body 41. That is, the support portion 52 of the suction port body 18A supports the pair of rotating cleaning bodies 32A on the same rotation center line Cr as the support portion 52 of the suction port body 18 of the first example.

[0155] The pair of rotary cleaning bodies 32A each have an inverted tapered shape with the outer diameter of the free end 32t side being larger than the outer diameter of the support end 32r side. The pair of rotary cleaning bodies 32A each have a truncated cone-shaped shaft core 81A and a cleaning member 82A provided on the outer periphery of the shaft core 81A.

[0156] The cleaning member 82A is preferably a brush having uniform bristle length. That is, the shaft core 81A preferably has the same inverted taper as the rotary cleaning body 32A, and the taper angle and taper ratio of the shaft core 81A are preferably the same as those of the rotary cleaning body 32A.

[0157] The rotating cleaning body 32A is pressed against the dust collecting surface f more strongly at the free end 32t side than at the support end 32r side, and the force acting between the cleaning component 82A and the dust collecting surface f increases as it approaches the support end 32r to the free end 32t. Therefore, the force acting on the thread-like dust wound around the rotating cleaning body 32A and sent to the free end 32t becomes greater as it approaches the free end 32t. Even if it is assumed that a part of the thread-like dust is wound around the rotating cleaning body 32A, the thread-like dust is guided to the free end 32t by a force greater than that of the suction port body 18 in the first example and is separated from the rotating cleaning body 32A.

[0158] Fig.19 It is a schematic diagram showing a third example of the suction port body involved in the embodiment of the present invention.

[0159] like Fig.19 As shown, the suction port body 18B of the third example involved in this embodiment includes a pair of rotating cleaning bodies 32B, and when the bottom surface 41b is directed toward the dusted surface f and the suction port body 41 is grounded, the free end 32t side of the pair of rotating cleaning bodies 32B is pressed against the dusted surface f more strongly than the support end 32r side. The cleaning parts 82B of each pair of rotating cleaning bodies 32B protrude longer from the bottom surface 41b of the suction port body 41 at a position closer to the free end 32t than the support end 32r.

[0160] The pair of rotating cleaning bodies 32B of the suction port body 18B, like the pair of rotating cleaning bodies 32 of the suction port body 18 of the first example, have a rotation center line Cr extending in a straight line in the left-right direction of the suction port body 41. That is, the support portion 52 of the suction port body 18B supports the pair of rotating cleaning bodies 32B on the same rotation center line Cr as the support portion 52 of the suction port body 18 of the first example.

[0161] The pair of rotary cleaning bodies 32B each have an inverted tapered shape with the outer diameter of the free end 32t being larger than the outer diameter of the support end 32r. The pair of rotary cleaning bodies 32B each have a cylindrical shaft core 81B and a cleaning member 82B provided on the outer periphery of the shaft core 81B.

[0162] The shaft core 81B is preferably a cylindrical shape having a uniform outer diameter like the shaft core 81 of the first example. That is, the cleaning member 82B has bristles with shorter hair length on the support end 32r side and bristles with longer hair length on the free end 32t side, thereby describing the inverted cone of the rotating cleaning body 32B. Therefore, the cone angle and cone ratio of the cleaning member 82B are the cone angle and cone ratio of the rotating cleaning body 32A. The cone of the cleaning member 82B is adjusted by pre-implanting bristles with longer hair length in the shaft core 81B and cutting them off.

[0163] The free end 32t side of the rotating cleaning body 32B is pressed against the dust surface f more strongly than the support end 32r side. The closer from the support end 32r to the free end 32t, the greater the force acting between the cleaning component 82B and the dust surface f. Therefore, the force acting on the thread-like dust wound around the rotating cleaning body 32B and sent to the free end 32t becomes greater as it approaches the free end 32t. Even if it is assumed that a part of the thread-like dust is wound 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 in the first example and is separated from the rotating cleaning body 32B.

[0164] Fig. 20 It is a schematic diagram showing a fourth example of the suction port body involved in the embodiment of the present invention.

[0165] like Fig. 20 As shown, the suction port body 18C of the fourth example involved in this embodiment includes a pair of rotating cleaning bodies 32. When the bottom surface 41b is directed toward the dusted surface f and the suction port body 41 is grounded, the free end 32t side of the pair of rotating cleaning bodies 32 is pressed against the dusted surface f more strongly than the support end 32r side. The cleaning components 82 of each of the pair of rotating cleaning bodies 32 protrude longer from the bottom surface 41b of the suction port body 41 at a position closer to the free end 32t than the support end 32r.

[0166] Unlike the support portion 52 of the suction port body 18 of the first example, the support portion 52C of the suction port body 18C obliquely supports the pair of rotary cleaning elements 32. The support portion 52C supports the pair of rotary cleaning elements 32 so that the free ends 32t of the pair of rotary cleaning elements 32 are closer to the dust collection surface f than the support ends 32r.

[0167] Therefore, unlike the pair of rotating cleaning bodies 32 of the suction port body 18 of the first example, the pair of rotating cleaning bodies 32A of the suction port body 18C have a pair of intersecting rotation center lines Cr. That is, unlike the support portion 52 of the suction port body 18 of the first example, the support portion 52C of the suction port body 18C supports the pair of rotating cleaning bodies 32 on the pair of intersecting rotation center lines Cr.

[0168] The support portion 52C includes a universal joint 121 that connects the pair of support shafts 93 so that the pair of support shafts 93 can rotate integrally even when the pair of support shafts 93 are tilted relative to each other. The support portion 52C may include a bellows or a coil spring that can follow the tilt of the pair of support shafts 93 instead of the universal joint 121.

[0169] The support portion 52C includes a pair of support shaft bases 92 provided on the pair of support shaft portions 93 , respectively, and a pair of bearings 91 rotatably supporting the pair of support shaft bases 92 .

[0170] Since the suction port 18C includes a pair of rotating cleaning elements 32 arranged in an inverted V shape, it is preferable to include a cleaning element storage recess 61C that defines a cleaning element chamber 63 in an inverted V shape similar to the pair of rotating cleaning elements 32 .

[0171] The free end 32t side of the rotating cleaning body 32 is pressed against the dust surface f more strongly than the support end 32r side, and the force acting between the cleaning component 82 and the dust surface f increases as it approaches the support end 32r to the free end 32t. Therefore, the force acting on the free end 32t of the rotating cleaning body 32, which acts on the linear dust wound around the rotating cleaning body 32, becomes larger as it approaches the free end 32t. Even if it is assumed that a part of the linear dust is wound around the rotating cleaning body 32, the linear dust is guided to the free end 32t of the rotating cleaning body 32 by a force greater than that of the suction port body 18 in the first example and is separated from the rotating cleaning body 32.

[0172] As described above, the suction port body 18, 18A, 18B, 18C and the electric vacuum cleaner 1 according to the present embodiment are provided with a rotating cleaning body 32, 32A, 32B, and the rotating cleaning body 32, 32A, 32B has a cleaning member 82, 82A, 82B arranged in such a manner that the support end 32r side is located in front of the free end 32t side in the rotation direction. Therefore, the suction port body 18, 18A, 18B, 18C and the electric vacuum cleaner 1 are such that, when the linear dust is wound around the rotating cleaning body 32, it can be guided to the free end 32t of the rotating cleaning body 32 and discharged. Therefore, the suction port body 18, 18A, 18B, 18C and the electric vacuum cleaner 1 are such that the user does not need to bother with the hand to remove the dust wound around the rotating cleaning body 32, and the wound dust does not hinder the rotation of the rotating cleaning body 32, and can provide a high convenience to the user. Moreover, the suction port bodies 18, 18A, 18B, 18C and the electric vacuum cleaner 1 do not need a structure for supporting the rotating cleaning body 32 and a mechanism for rotating the rotating cleaning body 32 at a position that is closer to the left and right sides of the suction port body 41 than the free ends 32t of the left-rotating cleaning body 32L and the free ends 32t of the right-rotating cleaning body 32R. Therefore, the suction port bodies 18, 18A, 18B, 18C and the electric vacuum cleaner 1 can scrape dust based on the rotating cleaning body 32 over the entire width of the suction port body 41.

[0173] In addition, the suction port bodies 18, 18A, 18B, 18C and the electric vacuum cleaner 1 according to the present embodiment are provided with a connection mechanism 89 for detachably connecting the rotary cleaning bodies 32, 32A, 32B to the support parts 52, 52C. Therefore, when the linear dust accidentally enters the boundary between the rotary cleaning bodies 32, 32A, 32B and the support part 52 and is wound around the support shaft part 93, the linear dust wound around the support shaft part 93 can be easily removed by removing the rotary cleaning bodies 32, 32A, 32B from the support parts 52, 52C.

[0174] Moreover, the suction port body 18, 18A, 18B, 18C and the electric vacuum cleaner 1 involved in this embodiment are provided with a suction port body 41, which has an inner wall surface 83i that is located on the extension line of the rotation center line Cr of the rotating cleaning body 32, 32A, 32B and is separated from and opposite to the free end 32t of the rotating cleaning body 32, 32A, 32B. The side wall 83 of the suction port body 41 having the inner wall surface 83i can be thinner within the limit of the wall thickness that can prevent obstacles from contacting the free end 32t. Therefore, the suction port body 18, 18A, 18B, 18C and the electric vacuum cleaner 1 can scrape dust based on the rotating cleaning body 32 over the entire width of the suction port body 41.

[0175] In addition, the suction port body 18, 18A, 18B, 18C and the electric vacuum cleaner 1 involved in this embodiment may also have a suction port main body 41 having a cleaning body chamber 63 for configuring a support portion 52, 52C and a pair of rotating cleaning bodies 32, 32A, 32B together, or may have a suction port main body 41 having a pair of cleaning body chambers 63 for configuring a pair of rotating cleaning bodies 32, 32A, 32B separately.

[0176] In addition, the suction port body 18, 18A, 18B, 18C and the electric vacuum cleaner 1 according to the present embodiment include a suction port body 41, which has a dust collection recess 62, which is arranged behind the rotating cleaning body 32, 32A, 32B and along the rotating cleaning body 32, 32A, 32B, and can act on a negative pressure to suck in the dust scraped by the rotating cleaning body 32, 32A, 32B. Thus, the linear dust to be wound around the rotating cleaning body 32, 32A, 32B is sent to the dust collection recess 62 in a direction close to the tangent line at the location where the rotating cleaning body 32, 32A, 32B and the dust collection surface f are set. Therefore, the suction port bodies 18, 18A, 18B, 18C and the electric vacuum cleaner 1 can prevent the linear dust from being wound around the rotary cleaning bodies 32, 32A, 32B.

[0177] In addition, the suction port bodies 18, 18A, 18B, 18C and the electric vacuum cleaner 1 according to the present embodiment have a dust suction recess 62 extending to the vicinity of the free ends 32t of the pair of rotating cleaning bodies 32. Therefore, the suction port bodies 18, 18A, 18B, 18C and the electric vacuum cleaner 1 can quickly suck the linear dust discharged from the free ends 32t of the rotating cleaning bodies 32, 32A, 32B.

[0178] Moreover, the suction port body 18, 18A, 18B, 18C and the electric vacuum cleaner 1 according to the present embodiment are provided with a suction port body 41 having a partition 68 extending downwardly toward the bottom surface of the body and located between the cleaning body storage recess 61, 61C and the dust collection recess 62. Therefore, the suction port body 18, 18A, 18B, 18C and the electric vacuum cleaner 1 are capable of appropriately adjusting the distribution of the negative pressure acting on the dust collection recess 62 in the width direction of the suction port body 41.

[0179] In addition, the suction port body 18, 18A, 18B, 18C and the electric vacuum cleaner 1 involved in this embodiment are provided with a partition 68 in which the left and right ends in the width direction of the suction port body 41 are farther away from the bottom surface 41b of the suction port body 41 than the central part. Therefore, the suction port body 18, 18A, 18B, 18C and the electric vacuum cleaner 1 can improve the dust removal stress at the two ends in the width direction of the suction port body 41, which is generally easy to reduce.

[0180] Moreover, the suction port bodies 18A, 18B, 18C and the electric vacuum cleaner 1 according to the present embodiment are provided with the rotating cleaning bodies 32, 32A, 32B, and when the bottom surface 41b is grounded toward the dusted surface f, the free end 32t side of the rotating cleaning bodies 32, 32A, 32B is pressed against the dusted surface f more strongly than the support end 32r side. Therefore, the suction port bodies 18A, 18B, 18C and the electric vacuum cleaner 1 are such that the linear dust can be guided to the free end 32t of the rotating cleaning bodies 32, 32A, 32B and separated with a greater force than when the rotating cleaning body 32 is pressed against the dusted surface f with a substantially uniform force from the support end 32r to the free end 32t.

[0181] Moreover, the suction port bodies 18A, 18B and the electric vacuum cleaner 1 according to the present embodiment are provided with the rotary cleaning bodies 32A, 32B having an inverted tapered shape with the outer diameter of the free end 32t side being larger than the outer diameter of the support end 32r side. Therefore, the suction port bodies 18A, 18B and the electric vacuum cleaner 1 are such that the free end 32t side of the rotary cleaning bodies 32A, 32B can be easily pressed against the dust surface f more strongly than the support end 32r side.

[0182] In addition, the suction port body 18A and the electric vacuum cleaner 1 according to the present embodiment include a rotating cleaning body 32A having a truncated cone-shaped shaft core 81 and a cleaning member 82A disposed on the outer periphery of the shaft core 81. Therefore, the suction port body 18A and the electric vacuum cleaner 1 can easily press the free end 32t side of the rotating cleaning body 32A against the dust surface f more strongly than the support end 32r side by using the cleaning member 82A having a certain bristle length.

[0183] Furthermore, the suction port body 18B and the electric vacuum cleaner 1 according to the present embodiment include a rotary cleaning body 32B having a cylindrical shaft core 81 and a cleaning member 82B disposed on the outer periphery of the shaft core 81. Therefore, the suction port body 18B and the electric vacuum cleaner 1 can easily press the free end 32t of the rotary cleaning body 32B more strongly against the dust surface f than the support end 32r by adding the cleaning member 82B having a longer bristle length.

[0184] In addition, the suction port body 18C and the electric vacuum cleaner 1 according to the present embodiment include a support portion 52C that supports a pair of rotating cleaning bodies 32 in a manner that the free end 32t side is closer to the dust surface f than the support end 32r side. Therefore, the suction port body 18C and the electric vacuum cleaner 1 can easily press the free end 32t side of the rotating cleaning body 32 against the dust surface f more strongly than the support end 32r side using a general rotating cleaning body 32 having a cylindrical outer shape.

[0185] Moreover, the suction port body 18, 18A, 18B, 18C and the electric vacuum cleaner 1 according to the present embodiment include a sealing portion 84 disposed between the suction port body 41 and the free ends 32t of the pair of rotating cleaning bodies 32. Therefore, the suction port body 18, 18A, 18B, 18C and the electric vacuum cleaner 1 are capable of discharging the linear dust to be wound around the rotating cleaning bodies 32, 32A, 32B, and on the other hand, the suction negative pressure can be prevented from decreasing via the cleaning body storage recesses 61, 61C to maintain the suction performance.

[0186] In addition, the suction port body 18, 18A, 18B, 18C and the electric vacuum cleaner 1 according to the present embodiment have a gap between the suction port body 41 and the free ends 32t of the pair of rotating cleaning bodies 32, which is narrower than the gap between the suction port body 41 and the free ends 32t of the pair of rotating cleaning bodies 32. Therefore, the suction port body 18, 18A, 18B, 18C and the electric vacuum cleaner 1 can discharge the linear dust to be wound around the rotating cleaning bodies 32, 32A, 32B, and on the other hand, can prevent the suction negative pressure from decreasing through the cleaning body storage recess 61, 61C and maintain the suction performance.

[0187] Therefore, according to the suction port body 18, 18A, 18B, 18C and the electric vacuum cleaner 1 involved in this embodiment, when the linear dust begins to be wound around the rotating cleaning body 32, 32A, 32B, the linear dust can be discharged in a manner not to be entangled with the rotating cleaning body 32, 32A, 32B.

[0188] Several embodiments of the present invention have been described, but these embodiments are presented as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and changes can be made without departing from the scope of the invention. These embodiments and their variations are included in the scope and purpose of the invention, and are included in the invention described in the scope of the patent claim and its equivalent scope.

Claims

1. A suction mouthpiece, comprising: A pair of rotating cleaning bodies can scrape dust off the surface to be cleaned by rotating; a driving source for outputting a driving force for rotating the pair of rotating cleaning bodies; a supporting portion that is sandwiched by the pair of rotating cleaning elements and supports the pair of rotating cleaning elements in a rotatable and cantilevered manner; and a power transmission mechanism for transmitting the driving force from the driving source to the supporting portion to rotate the pair of rotary cleaning bodies; The pair of rotating cleaning bodies includes a cleaning member disposed so that a side of the supporting end close to the supporting portion is located ahead of a side of the free end far from the supporting portion in the rotation direction.

2. The suction nozzle according to claim 1, wherein: A connection mechanism is provided for detachably connecting the pair of rotary cleaning elements and the support portion.

3. The suction mouthpiece according to claim 1 or 2, wherein: The suction port body includes a main body having inner wall surfaces that are located on an extension line of a rotation center line of the pair of rotating cleaning elements and that are spaced apart from and opposed to the free ends.

4. The suction mouthpiece according to claim 1 or 2, wherein: The suction port body includes a main body having a cleaning element storage recessed portion that partitions a cleaning element chamber in which the support portion and the pair of rotating cleaning elements are disposed.

5. The suction mouthpiece according to claim 1 or 2, wherein: The suction port body includes a main body having a cleaning element storage recessed portion that partitions a pair of cleaning element chambers in which the pair of rotating cleaning elements are individually disposed.

6. The suction mouthpiece according to claim 1 or 2, wherein: The suction port body includes a main body having a dust suction recessed portion, which is arranged behind the pair of rotating cleaning bodies when viewed from above and arranged along the pair of rotating cleaning bodies to form a negative pressure for sucking the dust scraped by the pair of rotating cleaning bodies.

7. The suction mouthpiece according to claim 6, wherein: The dust suction recess extends to the vicinity of the free ends of the pair of rotary cleaning bodies.

8. The suction port body according to claim 6, wherein: The suction port body includes a main body having a cleaning element storage recess in which the pair of rotating cleaning elements are arranged, and a partition portion extending between the dust suction recess and the cleaning element storage recess so as to hang downward toward a bottom surface of the main body.

9. The suction mouthpiece according to claim 7, wherein: The partition portion is formed such that both left and right end portions in the width direction of the main body are further away from the bottom surface of the main body than the center portion.

10. The suction mouthpiece according to claim 1 or 2, wherein: When the bottom surface is directed toward the dust receiving surface and the bottom surface is brought into contact with the dust receiving surface, the free ends of the pair of rotary cleaning elements are pressed against the dust receiving surface more strongly than the support ends.

11. The suction mouthpiece according to claim 9, wherein: The pair of rotary cleaning bodies each have an inverted tapered shape in which the outer diameter of the free end side is larger than the outer diameter of the support end side.

12. The suction mouthpiece according to claim 10, wherein: The pair of rotary cleaning bodies each has a truncated cone-shaped shaft core portion and the cleaning member provided on the outer periphery of the shaft core portion.

13. The suction mouthpiece according to claim 10, wherein: Each of the pair of rotary cleaning bodies includes a cylindrical shaft core portion and the cleaning member provided on the outer periphery of the shaft core portion.

14. The suction mouthpiece according to claim 9, wherein: The support portion supports the pair of rotary cleaning elements so that the free ends of the pair of rotary cleaning elements are closer to the dust collection surface than the support ends.

15. The inhalation mouthpiece according to claim 1 or 2, wherein: have: The main body has a cleaning element storage recess for dividing a cleaning element chamber in which the pair of rotating cleaning elements are arranged; and The sealing portion is provided between the main body and the free ends of the pair of rotating cleaning bodies.

16. The inhalation mouthpiece according to claim 1 or 2, wherein: The suction port body includes a main body having a cleaning element storage recess for dividing a cleaning element chamber in which the pair of rotating cleaning elements are arranged. A gap between the main body and the free ends of the pair of rotating cleaning elements is narrower than a gap between the main body and portions other than the free ends of the pair of rotating cleaning elements.

17. An electric vacuum cleaner comprising: Vacuum cleaner body; an electric blower housed in the vacuum cleaner body and generating negative pressure; and The suction port body according to any one of claims 1 to 13, being fluidly connected to the electric blower.

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