JP6178231B2 - Vacuum cleaner and suction tool - Google Patents

Description

  The present invention relates to an electric vacuum cleaner and a suction tool having a structure in which dust on a floor surface is scraped and sucked by rotating a rotary cleaning body.

  As a suction tool of a conventional vacuum cleaner, a rotary cleaning body capable of scavenging dust on the floor surface, an electric motor that drives the rotary cleaning body, and a control board that controls the electric motor are housed in a case, A technique has been proposed in which an electric motor is arranged behind the rotary cleaning body, and a control board is arranged behind the rotary cleaning body and below the electric motor (for example, see Patent Document 1).

JP 2012-245179 A

  However, in the suction tool of the vacuum cleaner described in Patent Document 1, since the circuit board is disposed behind the rotary cleaning body, the suction case (the housing of the suction tool) extends greatly behind the rotary cleaning body. As a result, the front-rear width of the suction case becomes longer, and there is a possibility that the suction of dust from the rear part of the suction tool may be impaired.

  It is an object of the present invention to provide a vacuum cleaner and a suction tool that improve the operability by reducing the front-rear width of the suction case and improve the dust suction performance from the rear part.

The present invention includes an electric blower that generates a suction force, a vacuum cleaner body having a dust collection unit that collects dust, and a suction tool connected to the vacuum cleaner body, the suction tool being a cleaning surface. A first rotary cleaning body having a rotation axis parallel to the rotation axis, an electric motor having an output shaft parallel to the rotation axis and rotating the first rotation cleaning body, a control board for controlling the electric motor, and the first A second rotary cleaning body disposed behind the one-rotation cleaning body, having an axis parallel to the rotation axis and in contact with the cleaning surface, the first rotation cleaning body, and the second rotation cleaning body are disposed. A suction chamber, and a suction case that is disposed above the suction chamber and has a partition wall that divides the motor and the control board. The second rotary cleaning body is planted on an outer peripheral surface. A brush body provided, and the partition wall is opposed to the second rotary cleaning body. The second rotating cleaning body includes a protrusion on a surface of the brush body and the brush body and the floor surface due to contact resistance between the brush body and the floor surface when the suction tool is moved backward during rotation of the first rotating cleaning body. When the suction tool is advanced, the contact resistance between the brush body and the protrusion becomes larger than the contact resistance between the brush body and the floor surface. The front end portion of the electric motor is regulated in front of the rear end portion of the first rotary cleaning body, and the storage chamber is provided with the electric motor on one end side in the axial direction of the rotary shaft and on the other end side. The control board is disposed, and the second rotary cleaning body is provided at least from the one end to the other end of the suction chamber.

  ADVANTAGE OF THE INVENTION According to this invention, the vacuum cleaner and suction tool which made small the front-back width | variety of a suction case, improved operativity, and improved the suction property of the dust from a rear part can be provided.

It is an appearance perspective view showing the whole vacuum cleaner concerning a 1st embodiment of the present invention. It is a top view of a suction tool. It is a bottom view of a suction tool. It is a top view which shows the state which removed the upper case of the suction tool. It is a wiring diagram inside a suction tool. It is the sectional view on the AA line of FIG. FIG. 3 is a sectional view taken along line B-B in FIG. 2. The top view of the lock mechanism of a bearing pressing member is shown, (a) is a locked state, (b) is a lock release state. It is a side view which shows typically the flow of dust when a suction tool is moved backward. It is a side view which shows typically the flow of dust when a suction tool is advanced. It is a bottom view which shows typically the flow of dust when a suction tool is moved backward. It is a bottom view which shows typically another effect by a suction tool. It is a schematic diagram which shows the flow of the cooling air inside a suction tool. It is a bottom view which shows the suction tool of the vacuum cleaner which concerns on 2nd Embodiment of this invention. It is a bottom view which shows the suction tool of the vacuum cleaner which concerns on 3rd Embodiment of this invention.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Embodiments according to the invention will be described below with reference to the drawings as appropriate. However, the embodiments are not limited to the following contents, and can be implemented with appropriate modifications within the scope of the gist of the invention. .

(First embodiment)
As shown in FIG. 1, the vacuum cleaner 1 includes a vacuum cleaner body 2, a hose portion 3, an operation tube 4 provided with a hand operation switch SW and the like, an extendable tube 5 provided in a telescopic manner, and a suction The tool 6 is provided.

  The vacuum cleaner body 2 includes an electric blower 2a that generates a suction force, a dust collection portion 2b that stores dust collected by the suction force of the electric blower 2a, and the like. In the present embodiment, the so-called cyclonic vacuum cleaner 1 will be described as an example, but the present invention may be applied to a so-called paper pack type vacuum cleaner.

  One end of the hose part 3 is connected to the connection port 2c of the cleaner body 2 so as to communicate with the dust collecting part 2b of the cleaner body 2. Further, the other end of the hose portion 3 is connected to one end of the operation tube 4.

  The operation tube 4 includes a grip 4 a having a hand operation switch SW and the like, a power supply terminal (not shown) to which power is supplied from the cleaner body 2 to which the extension tube 5 is connected. An energization terminal (not shown) provided at one end of the extension pipe 5 is connected to the power supply terminal.

  By operating the hand operation switch SW of the operation tube 4, it becomes possible to switch the strength of the operation of the electric blower 2 a and to turn on and off the first rotary cleaning body 20 (see FIG. 3) provided in the suction tool 6. ing.

  The extension pipe 5 includes an outer pipe 5a and an inner pipe 5b. One end of the inner pipe 5b is inserted into the other end of the outer pipe 5a, and is provided inside the outer pipe 5a and the inner pipe 5b (not shown). The air passages are connected so as to communicate with each other, and are configured to be extendable. FIG. 1 illustrates a state in which the extension pipe 5 is shortest.

FIG. 2 is a top view of the suction tool.
As shown in FIG. 2, the suction tool 6 includes a suction case 10 having a substantially T shape in a top view, and a suction joint 13 connected to the suction case 10.

  In the top view, the suction case 10 has a suction body 11 that is elongated in the left-right direction (width direction, axial direction of the rotation shaft of the first rotary cleaning body 20 to be described later), and a longitudinal center portion of the suction body 11. And a connecting portion 12 connected to the suction joint 13. A flow path R (see FIG. 3) that connects the suction body 11 and the suction joint 13 is formed in the connecting portion 12.

  The mouthpiece main body 11 is provided with a bumper 11a from the front end surface to the left and right side surfaces. The bumper 11a is made of an elastic material such as rubber or elastomer, and ensures airtightness in the mouthpiece body 11 when used, and the mouthpiece body 11 collides with furniture or the like when the electric vacuum cleaner 1 (see FIG. 1) is used. When it does, it plays the role of the shock absorbing material which absorbs the damage | damage to the said furniture etc. and the impact to the suction inlet main body 11. FIG.

  The suction joint 13 includes a first connecting portion 14 that is rotatably connected to the connecting portion 12, and a second connecting portion 15 that is rotatably connected to the first connecting portion 14. ing.

  The first connecting portion 14 has a substantially semi-track shape in a top view of FIG. 2 and has a cylindrical shaft 14 a that is connected to the connecting portion 12. The shaft 14 a is supported by bearing portions 12 g and 12 g (see FIG. 4) formed on the connecting portion 12, with the axial direction being the longitudinal direction of the mouthpiece body 11. Moreover, the 1st connection part 14 is comprised so that rotation from a substantially parallel state with respect to the floor surface (cleaning surface) M (refer FIG. 6) to a substantially perpendicular | vertical state (up-down direction) is possible. . That is, by rotating the first connecting portion 14 with respect to the suction case 10 with the shaft 14a as a fulcrum, the extension pipe 5 is placed between a state substantially parallel to the floor surface M (see FIG. 6) and a state substantially vertical. Can be rotated.

  The second connecting part 15 is configured to be rotatable with respect to the first connecting part 14 in the longitudinal direction of the mouthpiece body 11 (clockwise and counterclockwise in FIG. 2). Thereby, for example, the extension pipe 5 can be tilted toward a state substantially parallel to the floor surface M from a state in which the extension pipe 5 is substantially perpendicular to the floor surface M.

  The second connecting portion 15 is provided with power supply terminals 15a and 15a for supplying power. In addition, in the vacuum cleaner 1 (refer FIG. 1) of this embodiment, it is comprised so that the electric power supplied to the suction tool 6 may be supplied from the cleaner body 2 through the hose part 3, the operation tube 4, and the extension tube 5. Yes.

  For example, in the state in which the extension pipe 5 (see FIG. 1) is substantially perpendicular to the floor surface M, such a suction joint 13 tilts the extension pipe 5 in the left-right direction (longitudinal direction), so that the operation pipe 4 ( By twisting the grip 4a) in either the left or right direction, the suction body 11 can be rotated approximately 90 degrees in the left or right direction, and cleaning can be performed with the left and right direction of the suction body 11 in the moving direction. Therefore, the suction tool 6 can be moved along the side of the wall for cleaning, or the suction tool 6 can be inserted into a narrow gap for cleaning.

FIG. 3 is a bottom view of the suction tool.
As shown in FIG. 3, the suction tool 6 includes a first rotary cleaning body 20 and a second rotary cleaning body 30. The suction case 10 (suction body 11) is formed with a suction chamber Q2 (see FIG. 6) having an opening on the lower surface (the surface facing the cleaning surface).

  The first rotary cleaning body 20 is disposed on the front side in the front-rear direction along the longitudinal direction (left-right direction) of the suction body 11 and is rotatably supported by the suction body 11. Moreover, the 1st rotation cleaning body 20 is provided continuously from the one end side of the longitudinal direction (the axial direction of the 1st rotation cleaning body 20) of the suction inlet main body 11 to the other end side.

  Moreover, the 1st rotation cleaning body 20 is provided with multiple types of brushes 20a, 20b, 20c, such as a brush with different hardness, and each brush 20a, 20b, 20c spirals with respect to the rotating shaft 21 (refer FIG. 6). It is arranged. In the present embodiment, the case where three types of brushes 20a, 20b, and 20c are provided has been described as an example. However, the present invention is not limited to this and may be two types or less, and may be four types. The above may be sufficient, and the structure which arrange | positions the braid | blade member which consists of elastic materials, such as rubber | gum, between the brushes arrange | positioned spirally may be added, and it can change suitably.

  The second rotary cleaning body 30 has a brush body 30 b having a diameter smaller than the diameter of the first rotary cleaning body 20, and is disposed rearward and parallel to the first rotary cleaning body 20. Further, the second rotary cleaning body 30 is provided continuously from one end side to the other end side in the axial direction of the first rotary cleaning body 20 (longitudinal direction of the suction body 11). In other words, the second rotary cleaning body 30 is configured by one brush body 30b.

  Moreover, the 2nd rotary cleaning body 30 has the axial part 30a (shaft) parallel to the rotating shaft 21 of the 1st rotary cleaning body 20, and the axial part 30a is rotatably supported by the suction case 10 (suction body 11). Has been. The second rotary cleaning body 30 is not driven by an electric motor, but is configured to rotate by a frictional force with the floor surface M (see FIG. 6) when the suction tool 6 is moved. is there. Thus, since the 2nd rotary cleaning body 30 is not driven by an electric motor, but is supported by the suction mouth main body 11 via the axial part 30a, the structure of the 2nd rotary cleaning body 30 is simplified. be able to.

  The suction tool 6 includes a brush drive switch 16, a wheel 17, and bearing pressing members 31 and 32 on the lower surface of the connecting portion 12 of the suction case 10.

  The brush drive switch 16 is a switch that detects whether or not the lower surface of the suction tool 6 is in contact with the floor surface M (cleaning surface), and is configured together with the wheels 16a. The wheel 16a is provided so that a part of the wheel 16a always protrudes from the lower surface of the suction case 10 (connecting portion 12) by a biasing means such as a spring. When it is detected that the wheel 16a jumps out of the suction case 10 and is not in contact with the floor surface M, the drive of the electric motor 40 is stopped by the control of the circuit board 50 (control board) described later, and the first rotary cleaning body The rotation of 20 stops. Further, when it is detected that the wheel 16a is pushed into contact with the floor surface M, the electric motor 40 is driven by the control of the circuit board 50, and the first rotary cleaning body 20 rotates.

  The wheel 17 receives the stress of the forward / backward movement and rotation operation operated by the operation tube 4, and causes the bottom surface of the suction tool 6 to closely contact the floor surface (cleaning surface), thereby improving the operation performance of the suction tool 6. Have.

  The wheel 17 has a shaft 17a parallel to the shaft portion 30a (see FIG. 6) of the second rotary cleaning body 30, and the shaft 17a is rotatably supported by the suction case 10 (connecting portion 12). Yes. The wheel 17 has a small diameter portion 17b having a smaller diameter than both left and right ends in the center in the axial direction. The recess formed by the small-diameter portion 17b is set to a gap larger than a size that allows large solid dust such as rice grains to pass through when the wheel 17 contacts the floor surface M, for example.

  The bearing pressing member 31 supports one end of the rotary shaft 21 (see FIG. 6) of the first rotary cleaning body 20 and the shaft portion 30a (see FIG. 6) of the second rotary cleaning body 30. It is fixed via a screw 31b.

  The bearing pressing member 32 supports the other end of the rotary shaft 21 (see FIG. 6) of the first rotary cleaning body 20 and the shaft portion 30a (see FIG. 6) of the second rotary cleaning body 30. It is fixed via a lock mechanism (see FIG. 8) described later.

FIG. 4 is a top view showing a state where the upper case of the suction tool is removed.
As shown in FIG. 4, the suction tool 6 includes an electric motor 40 that drives the first rotary cleaning body 20 above the first rotary cleaning body 20 (see FIG. 3) and the second rotary cleaning body 30 (see FIG. 3). And a circuit board 50 for controlling the electric motor 40.

  The electric motor 40 is attached to one end side in the longitudinal direction of the suction body 11 (lower case 11A). Further, the output shaft 40 a (see FIG. 6) of the electric motor 40 is arranged in parallel with the longitudinal direction of the inlet body 11. Further, the output shaft 40a (see FIG. 6) of the electric motor 40 extends toward one end side in the longitudinal direction, and at one end portion (the right end portion in the drawing) in the suction mouth body 11 via the toothed belt 41p. It is connected to a rotating shaft 21 (see FIG. 6) of the rotary cleaning body 20.

  In the electric motor 40, a front cap 42 is fixed to one end of a stator 41, and a cover member 43 is attached to the other end of the stator 41 via a rear cap (not shown).

  In the stator 41, an opening 41c for introducing cooling air into the stator 41 is formed on the outer peripheral surface on the front cap 42 side. Further, an opening 41 d for discharging cooling air from the stator 41 is formed on the cover member 43 side of the stator 41. The number and position of the openings 41c and 41d are not limited to the present embodiment as long as the motor 40 can be cooled, and can be changed as appropriate.

  The cover member 43 is a member that covers an end portion of a rear cap (not shown) of the stator 41, is formed of an insulating member having elasticity such as synthetic rubber, and covers electric components provided on the rear cap. In the present embodiment, since the one end side of the electric motor 40 is supported in the storage chamber Q1 using the elasticity of the cover member 43, the vibration of the electric motor 40 is difficult to be transmitted to the suction case 10 (see FIG. 2). ing.

  The front cap 42 is provided with a resilient bush such as synthetic rubber (not shown), and the electric motor 40 is connected to the lower case 11A and the upper case 11B (see FIG. 2) through the bush. 6)). Therefore, the electric motor 40 has a vibration-proof structure on the front cap 42 side.

  The circuit board 50 is attached to the other end side of the suction body 11 in the longitudinal direction. The circuit board 50 has a rectangular substrate with long sides arranged in the longitudinal direction, and is arranged in the mouthpiece body 11 with the mounting surface 50a facing upward in the vertical direction. Note that the mounting surface 50a is not necessarily limited to upward in the vertical direction, and may be inclined with respect to the horizontal direction, or may be directed in the front-rear direction (vertically).

  The connecting portion 12 has a space Q3 communicating with a space (accommodating chamber Q1) in which the electric motor 40 is accommodated in an area including the bearing portion 12g. The space Q3 communicates with the cylindrical space of the shaft 14a and communicates with the flow path R (see FIG. 3) inside the first connecting portion 14. In addition, a communication hole 12a1 that connects the flow path R (see FIG. 3) and the space Q3 is formed in the wall portion 12a that partitions the flow path R (see FIG. 3) and the space Q3.

  A bearing unit 41 u is provided on one end side of the mouthpiece body 11. The bearing unit 41u is provided with a power transmission mechanism including a pulley 41g and a toothed belt 41p that transmit the driving force from the electric motor 40 to the first rotary cleaning body 20 (see FIG. 3).

FIG. 5 is a wiring diagram inside the suction tool.
As shown in FIG. 5, the circuit board 50 is connected to the electric motor 40 via lead wires 60a and 60a, and connected to the power supply terminal 15a (see FIG. 4) via lead wires 60b and 60b. It is connected to the brush drive switch 16 (see FIG. 3) via 60c.

  The suction case 10 includes a storage chamber Q1 (see FIG. 6) in which the electric motor 40 and the circuit board 50 are stored, and a suction chamber Q2 (see FIG. 6) in which the first rotary cleaning body 20 and the second rotary cleaning body 30 are stored. The communication portions 18 and 19 are formed in the partition wall 11c for separating the storage chamber Q1 and the suction chamber Q2.

  The communication part 18 is composed of a plurality of small holes 18a, is located between the electric motor 40 of the suction body 11 and the circuit board 50, and communicates with the suction chamber Q2 (see FIG. 6).

  The communication part 19 is composed of a plurality of small holes 19a, is located in the connection part 12, and communicates with the flow path R (see FIG. 3). The small hole 19a is formed so as to be biased toward the circuit board 50 from the longitudinal center of the suction body 11.

  The suction tool 6 includes a light emitting means 70 at the center in the longitudinal direction (left-right direction) of the mouthpiece body 11. The light emitting means 70 includes a light guide plate 71 that is elongated in the longitudinal direction, leg portions 72 a and 72 b that support the light guide plate 71, and LED elements 73.

  The light guide plate 71 is made of, for example, a transparent or translucent plate-like member such as an acrylic resin, and is disposed so as to be horizontal above the circuit board 50 via the leg portions 72a and 72b. The leg portion 72a is disposed at a corner portion (inner rear corner portion) on the circuit board 50, and the leg portion 72b is disposed on the partition wall 11c.

  The LED element 73 is mounted at the position of the leg portion 72 a at the corner of the circuit board 50. The circuit board 50 is also provided with a drive circuit that causes the LED element 73 to emit light. Thus, by incorporating the drive circuit of the LED element 73 into the circuit board 50, the number of parts (the number of boards) can be reduced.

  When the LED element 73 emits light, light is transmitted from the end portion of the light guide plate 71 to the exposed portion 71a in the central portion. The exposed portion 71a is a portion exposed to the outside from an opening 11b (see FIG. 2) formed in the mouthpiece body 11. Thus, by arranging the LED element 73 on the circuit board 50 on the side closest to the exposed portion 71a, the length of the light guide plate 71 can be minimized.

  The LED element 73 is not limited to an element that emits light in a single color, and an element that emits light in multiple colors may be used to switch the color of light emitted according to the operation mode of the vacuum cleaner 1.

6 is a cross-sectional view taken along line AA in FIG.
As shown in FIG. 6, the mouthpiece body 11 of the mouthpiece case 10 includes a lower case 11A that forms a lower portion so as to cover the first rotary cleaning body 20, and an upper case 11B that is attached to the upper portion of the lower case 11A. I have. The main parts of the suction case 10 including the lower case 11A and the upper case 11B and the suction joint 13 described above are formed of a light and hard material, for example, a synthetic resin material such as ABS resin, and the rigidity is enhanced.

  The lower case 11A has a partition wall 11c that partitions a suction chamber Q2 in which the first rotary cleaning body 20 and the second rotary cleaning body 30 are arranged and a storage chamber Q1 in which the electric motor 40 is stored. The partition wall 11 c includes a partition wall bending portion 11 d formed along the surface of the first rotary cleaning body 20 and a partition wall bending portion 11 e formed along the surface of the second rotation cleaning body 30. The part 11d and the partition curved part 11e are formed continuously. In other words, it means that a wall extending in the vertical direction that partitions between the first rotary cleaning body 20 and the second rotary cleaning body 30 is not formed at the boundary between the partition curved part 11d and the partition curved part 11e. Yes. Moreover, the partition curved part 11d extends to a substantially front end part of the first rotary cleaning body 20 in a sectional view. The partition curved portion 11e extends from the rear end portion of the second rotary cleaning body 30 so as to descend to a height that substantially coincides with the shaft portion 30a in the sectional view.

  The upper case 11B is formed integrally with the connecting portion 12 and covers a main body portion 11f that covers the upper portion of the electric motor 40 and the circuit board 50 (see FIG. 4), and a cover portion 11g that is arranged on the outside of the main body portion 11f. ,have. The cover portion 11g is disposed over the front portion and the left and right end portions of the upper case 11B (see FIG. 2). In addition, a communication hole 11g1 is formed on the front surface side of the cover portion 11g to allow communication between the accommodation chamber Q1 in which the electric motor 40 is accommodated and the outside of the suction tool 6. In the present embodiment, the bumper 11a is held by being sandwiched between the lower case 11A and the upper case 11B (cover portion 11g).

  In the present embodiment, when the suction case 10 is viewed from the front (when viewed from the front), the case where the communication hole 11g1 is formed at a position where it can be visually recognized has been described as an example. The configuration is not limited. For example, the communication hole 11g1 is formed below the upper end portion 11a1 of the bumper 11a in the vertical direction and the communication hole 11g1 is not blocked by the bumper 11a, and the suction case 10 is viewed from the front (viewed from the front). Sometimes, the communication hole 11g1 may be formed at a position where it cannot be visually recognized.

  As for the 1st rotation cleaning body 20, the core member 22 holding brush 20a, 20b, 20c on the rotating shaft 21 is externally fitted. The core member 22 has a substantially C-shaped holding section 22a that holds the brush 20a, is adjacent to both sides of the holding section 22a, and has the same cross-sectional holding sections 22b and 22b that hold the brush 20b, and is adjacent to the holding section 22b. The holding portion 22c having the same cross-sectional shape that holds the brush 20c is provided, and the holding portions 22a, 22b, and 22c are arranged in a spiral shape with respect to the axial direction of the rotating shaft 21. Thus, by arranging the brushes 20a, 20b, and 20c in a spiral shape, when the first rotary cleaning body 20 rotates, the brushes 20a, 20b, and 20c can be continuously applied to the floor surface M, Vibration during operation of the first rotary cleaning body 20 can be suppressed.

  As for the 2nd rotary cleaning body 30, the pipe body 30e is fixed to the circumference | surroundings of the axial part 30a, and the brush body (raised cloth) 30b is planted by the outer peripheral surface of this pipe body 30e. The tip of the brush body 30b is not limited to a brush height that touches the entire surface of the partition wall curved portion 11e, and does not necessarily need to touch the entire surface of the partition wall curved portion 11e.

  For example, as shown in FIG. 6, a protrusion 35a having a substantially triangular cross section may be provided on the inner side of the partition curved portion 11e (the surface facing the brush body 30b). The protrusion 35a is formed to extend linearly along the shaft portion 30a at a position corresponding to the brush body 30b. In this case, by setting the brush height so that the rising surface 35a1 of the protrusion 35a extending toward the shaft portion 30a and the tip of the brush body 30b are in contact with each other, the second rotary cleaning body 30 is frictionally resistant in the rotational direction W2. However, the frictional resistance is large in the direction opposite to the rotational direction W2, and the locked state is obtained. In the present embodiment, the case where the protrusion 35a is provided at one place has been described as an example. However, the present invention is not limited to this, and the protrusion 35a is spaced in the rotation direction of the second rotary cleaning body 30. Alternatively, it may be configured to be provided at two or more locations. In addition, the cross-sectional shape of the protrusion 35a is not limited to a triangle, and the protrusion 35a is directed to the shaft portion 30a as long as it can regulate the rotation of the second rotary cleaning body 30 in the direction opposite to the rotation direction W2. It may be a plate-like protrusion that extends.

  More specifically, the rotational driving force of the second rotary cleaning body 30 is a frictional force between the brush body 30b and the floor surface M, and the rotational braking force of the second rotary cleaning body 30 is the brush body 30b and the protrusion 35a. It is the friction force. The fine fibers constituting the brush body 30b are inclined in the circumferential direction with respect to the pipe body 30e, and the direction of the inclination is from the front of the suction tool 6 to the rear at a position where the brush body 30b is in contact with the floor surface. It is. For this reason, when the suction tool 6 is advanced, the frictional force between the brush body 30b and the floor surface M, that is, the rotational driving force of the second rotary cleaning body 30 is reduced, and the frictional force between the brush body 30b and the projection 35a, that is, the first friction force. The rotational braking force of the two-rotating cleaning body 30 increases, and the rotation of the second rotational cleaning body 30 is restricted. Conversely, when the suction tool 6 is moved backward, the frictional force between the brush body 30b and the floor surface M, that is, the rotational driving force of the second rotary cleaning body 30 increases, and the frictional force between the brush body 30b and the projection 35a, that is, the second. The rotational braking force of the rotary cleaning body 30 is reduced, and the second rotary cleaning body 30 rotates.

  In the present embodiment, it has been described that when the suction tool 6 moves forward, the rotation of the second rotary cleaning body 30 is substantially locked. However, the suction tool 6 is not necessarily locked and the suction tool 6 is moving forward. If the rotation of the second rotary cleaning body 30 becomes slower than when it is free, the dust swept into the suction chamber Q2 by the first rotary cleaning body 20 is swept out to the rear of the suction mouth body 11. Can be prevented.

  Further, in the present embodiment, the case where the brush bodies 30b are evenly arranged in the entire circumferential direction of the pipe body 30e has been described as an example. However, the present invention is not limited thereto, and is similar to the first rotary cleaning body 20. Moreover, the structure which arrange | positions the brush body 30b helically with respect to the axial direction of the axial part 30a may be sufficient.

  Further, the hues of one end and the other end of the first rotary cleaning body 20 are different from each other (for example, one end side is green and the other end side is blue). It is preferable that the first rotary cleaning body 20 has a color corresponding to the hues at one end and the other end (one end side is green and the other end side is blue). Thereby, when removing the 2nd rotation cleaning body 30 and reassembling, it can prevent that the direction of the reverse eye of the brush body 30b becomes reverse.

  As shown in FIG. 6, the stator 41 (casing) of the electric motor 40 has a substantially oval cross section (outline of cross section orthogonal to the output shaft 40 a, round cross section). The stator 41 includes a pair of arc portions 41a and a pair of linear portions 41b that connect these arc portions 41a. The electric motor 40 is not limited to a substantially oval shape, and may be a circular shape.

  In addition, the electric motor 40 is accommodated in the accommodation chamber Q1 such that the linear portion 41b is inclined with respect to the vertical axis Z1, that is, one arc portion 41a faces upward and the other arc portion 41a faces backward and downward. Has been.

  In addition, the electric motor 40 has a front end portion 41s (frontmost portion in the front-rear direction) of the electric motor 40 (stator 41) in the accommodation chamber Q1 that is more than a rear end portion 20s (the rearmost portion in the front-rear direction) of the first rotary cleaning body 20. It arrange | positions so that it may be located ahead. Thereby, the distance of the electric motor 40 which protrudes back from the rear-end part 20s of the 1st rotation cleaning body 20 can be shortened, and it becomes possible to shorten the front-back width | variety of the suction inlet main body 11. FIG.

  Further, in the accommodation chamber Q1, the electric motor 40 has a lower end portion 41t (lowermost portion in the vertical direction) of the electric motor 40 (stator 41) perpendicular to an upper end portion 20t (uppermost portion in the vertical direction) of the first rotary cleaning body 20. It arrange | positions so that it may be located under the direction. Thereby, the distance of the electric motor 40 which protrudes upwards from the upper end part 20t of the 1st rotation cleaning body 20 can be shortened, and the height (maximum height) from the cleaning surface of the suction inlet main body 11 can be made low. As a result, the mouthpiece body 11 can be easily inserted into a low gap such as a sofa or a bed.

  An armature 44 is rotatably supported inside the stator 41. In addition, two magnets 45 formed in a field tile shape are fixed to the inner periphery of the stator 41 at intervals in the circumferential direction. That is, the electric motor 40 of this embodiment is a two-pole seven-slot motor provided with seven slots and two magnets 45. The number of slots described above is not limited to seven, and may be set to another number (for example, eight).

  The armature 44 has an output shaft 40a, and a core member 44a and a commutator 44b are fixed to the output shaft 40a. The core member 44a is configured by stacking iron core pieces, and has a plurality of (for example, seven in the present embodiment) teeth 44c extending radially about the output shaft 40a. The teeth 44c are formed in a substantially T shape when viewed from the axial direction, and long dovetail slots (for example, seven in this embodiment) are formed between the teeth 44c in the axial direction. A coil (not shown) is wound around the tooth 44c through a slot.

  Further, the upper case 11B of the mouthpiece main body 11 has a shape substantially along the arc portion 41a and the straight portion 41b in the vicinity of the arc portion 41a and the vicinity of the straight portion 41b. Further, the lower case 11A of the mouthpiece body 11 extends substantially upward from the middle of the partition curved portion 11e and is connected to the upper case 11B.

7 is a cross-sectional view taken along line BB in FIG.
As shown in FIG. 7, the circuit board 50 is arranged in the accommodation chamber Q <b> 1 so that the mounting surface faces upward in the vertical direction (vertical direction). That is, the circuit board 50 is disposed not on the rear side of the first rotary cleaning body 20 but on the upper side of the upper end portion 20t (uppermost portion in the vertical direction) of the first rotary cleaning body 20. The circuit board 50 is fixed in the suction body 11 so as not to be displaced by positioning means or screw fixing. In the present embodiment, the case where the circuit board 50 is horizontally disposed has been described as an example. However, the circuit board 50 may be disposed in an inclined state with respect to the horizontal direction. The circuit board 50 may be arranged in an upright state so that the mounting surface of the circuit board faces in the front-rear direction.

  8A and 8B are plan views of the lock mechanism of the bearing pressing member, where FIG. 8A shows a locked state and FIG. 8B shows a unlocked state. FIG. 8A shows a state where the bearing pressing member 32 (see FIG. 8B) is removed for convenience of explanation.

  As shown in FIG. 8A, the suction mouth main body 11 includes a bearing portion 41 m that rotatably supports an end portion (the other end) of the rotary shaft 21 of the first rotary cleaning body 20, and a second rotary cleaning body 30. It has a bearing portion 41n that rotatably supports the end portion (the other end) of the shaft portion 30a.

  The bearing holding member 32 can be attached to and detached from the lower case 11 </ b> A (see FIG. 6) of the mouthpiece main body 11, and is attached to the lower surface on the other end side of the mouthpiece body 11 via the locking member 33.

  The locking member 33 has a cylindrical support portion 33a, and the support portion 33a is supported from above and below by support protrusions (not shown) protruding from the upper case 11B and the lower case 11A. In addition, the locking member 33 includes a locking portion 33b that can move forward and backward from a slit-like hole (not shown) formed in the side surface 41u1 of the bearing unit portion 41u by the rotation of the support portion 33a, and a locking portion. A lever 33c for moving the 33b forward and backward from the side surface 41u1 is formed.

  In the locked state shown in FIG. 8A, a part of the engaging portion 33b protrudes from a slit-like hole (not shown) formed in the side surface 41u1, and a slit-like hole formed in the bearing retainer 32. The bearing pressing member 32 is fixed to the mouthpiece main body 11 by entering the locking portion 33b that protrudes (not shown).

  Then, by rotating the lever 33c in the clockwise direction shown in the figure from the locked state shown in FIG. 8A, the support portion 33a rotates in the clockwise direction, and as shown in FIG. The bearing retainer 32 can be removed from the mouthpiece main body 11 by the part 33 b coming out of a slit-like hole (not shown) formed in the bearing retainer 32.

  By the way, the brushes 20a, 20b, and 20c of the first rotary cleaning body 20 are liable to be entangled with fibrous items such as lint or hair, and once entangled, this kind of dust is gradually accumulated by rotation, and the brush It comes to be fastened to the cylindrical base that fixes 20a, 20b, 20c. Therefore, the first rotary cleaning body 20 is removed from the mouthpiece body 11 and cleaned in order to remove fiber-like things such as lint entangled with the brushes 20a, 20b and 20c of the first rotary cleaning body 20 and hair. There is a need.

  Therefore, in a state where the suction tool 6 removed from the extension pipe 5 is directed upward, the lever 33c is operated as described above to remove the bearing pressing member 32 from the inlet body 11. Then, after holding the brushes 20a, 20b, and 20c on the bearing portion 41m side of the first rotary cleaning body 20 with a finger and pulling it upward, the first rotary cleaning body 20 is lifted obliquely upward on the other end side, thereby One end (one side opposite to the bearing portion 41 m) of the one-turn cleaning body 20 is detached from the suction mouth body 11.

  The second rotary cleaning body 30 also has a second rotary cleaning body 30b by holding the brush body 30b on the bearing 41n side and pulling it upward, and then pulling the second rotary cleaning body 30 diagonally upward on the other end side. One end of the body 30 (the side opposite to the bearing portion 41n) can be detached from the mouthpiece body 11.

  After cleaning, the one end of the first rotary cleaning body 20 and one end of the second rotary cleaning body 30 are assembled into the suction mouth body 11 in the reverse order to the above, and then the other end of the first rotary cleaning body 20 is connected to the bearing portion. 41m, the other end of the second rotary cleaning body 30 is pushed into the bearing portion 41n from above. Then, after positioning the bearing pressing member 32 at a predetermined position on the suction mouth body 11, the bearing pressing member 32 is locked by the locking portion 33b by operating the lever 33c in the opposite direction.

  In this way, both the first rotary cleaning body 20 and the second rotary cleaning body 30 can be removed from the suction mouth body 11 simply by removing the bearing pressing member 32 on one side, and the first rotary cleaning body 20 and the second rotation cleaning body 20 can be removed. The workability at the time of cleaning the cleaning body 30 can be improved. Moreover, the 2nd rotation cleaning body 30 is easily replaceable by comprising the 2nd rotation cleaning body 30 with one brush. For example, as the second rotary cleaning body 30, one for carpet and one for flooring are prepared and can be easily exchanged according to the user's preference (use environment). Further, since the user may think that the function of sucking dust from the back side of the mouthpiece body 11 is unnecessary, the second rotary cleaning body 30 is brushed so as to cope with such a case. It may be possible to replace it with a shape.

  FIG. 9 is a side view schematically showing the flow of dust when the suction tool is moved backward. When the suction tool 6 is not in contact with the floor surface M, the wheel 16a provided in the connecting portion 12 protrudes downward, the brush drive switch 16 is turned off, and the operation of the first rotary cleaning body 20 is performed. Stops.

  As shown in FIG. 9, when the suction tool 6 contacts the floor surface M, the wheel 16a is pushed in (see the white arrow), the brush drive switch 16 is turned on, and the first rotary cleaning body 20 is in the W1 direction (illustrated). Rotate counterclockwise. At this time, since the tips of the brushes 20a, 20b, and 20c in the region that contacts the floor surface M are bent, the contact resistance between the brushes 20a, 20b, and 20c and the floor surface M can be sufficiently secured. It is possible to effectively scrape M dust.

  Similarly, when the second rotary cleaning body 30 is in contact with the floor surface M, the brush body 30b in the region in contact with the floor surface M is bent, so that the contact resistance between the brush body 30b and the floor surface M is sufficiently increased. Can be secured.

  In this case, when the suction tool 6 is moved backward while the suction tool 6 is in contact with the floor surface M, the second rotary cleaning body 30 causes the brush body 30b and the partition wall curved portion to contact each other due to the contact resistance between the brush body 30b and the floor surface M. Since contact resistance with 11e (refer FIG. 6) is small, it rotates to the rotation direction shown by the code | symbol W3, and the dust DS on the floor M can be introduce | transduced in the suction chamber Q2 (refer FIG. 6). The introduced dust DS is carried from the suction chamber Q2 (see FIG. 6) to the passage of the suction joint 13 (see FIG. 2) through the flow path R (see FIG. 3), and then the extension pipe 5, the operation pipe 4 and the hose. It is attracted | sucked by the dust collection part 2b of the cleaner body 2 through the part 3 (refer FIG. 1). The air from which the dust has been removed by the dust collecting portion 2b passes through a filter (not shown) and the electric blower 2a and is discharged to the outside of the cleaner body 2 (see FIG. 1).

FIG. 10 is a side view schematically showing the flow of dust when the suction tool is advanced.
As shown in FIG. 10, when the suction tool 6 is advanced in a state where the suction tool 6 is in contact with the floor surface M, the second rotary cleaning body 30 has a brush body rather than the contact resistance between the brush body 30 b and the floor surface M. Since the contact resistance between 30b and the projection 35a of the partition curved portion 11e is large, the dust does not rotate and the dust sucked into the suction chamber Q2 can be prevented from being swept out to the rear of the suction body 11. In particular, it is possible to suppress the dust sucked into the suction chamber Q <b> 2 by the rotation of the first rotary cleaning body 20 from being flipped rearward and jumping out to the rear of the suction body 11.

  The sucked dust is conveyed from the suction chamber Q2 (see FIG. 6) to the passage of the suction joint 13 through the flow path R (see FIG. 3), and then through the extension pipe 5, the operation pipe 4 and the hose portion 3 to the main body of the cleaner. 2 is collected by the dust collecting part 2b (see FIG. 1). The air from which the dust has been removed by the dust collecting portion 2b passes through a filter (not shown) and the electric blower 2a and is discharged to the outside of the cleaner body 2 (see FIG. 1).

  As described above, when the second rotary cleaning body 30 in contact with the floor surface M is provided behind the first rotary cleaning body 20, the suction tool 6 is moved backward (when the suction tool 6 is pulled rearward). ), The second rotary cleaning body 30 rotates due to contact resistance with the floor surface M, so that the dust DS behind the suction body 11 can be sucked into the suction chamber Q2 (see FIG. 9).

  Further, when the suction tool 6 is moved forward (when the suction tool 6 is pushed forward), the rotation of the second rotary cleaning body 30 is restricted, so that the first rotary cleaning body 20 enters the suction chamber Q2. It is possible to prevent the dust that has been scraped out from being swept away from the mouthpiece main body 11 (see FIG. 10).

  Moreover, since it is not necessary to provide a movable part as a means which regulates the rotation direction of the 2nd rotary cleaning body 30, a structure becomes simple. Moreover, the risk of the regulation function being impaired due to the intrusion of sand dust or the like is reduced.

FIG. 11 is a bottom view schematically showing the flow of dust when the suction tool is moved backward.
As shown in FIG. 11, since the 2nd rotary cleaning body 30 is provided in all the subs from one end to the other end of the 1st rotary cleaning body 20, when the suction tool 6 is moved backward (the suction tool 6 is changed). When pulled backward), the dust DS1, DS2 on both sides (both sides in the axial direction) of the suction body 11 can be sucked into the suction chamber Q2 (see FIG. 6), and the dust DS3 in the center of the suction body 11 is sucked. It can also be sucked into the chamber Q2 (see FIG. 6). Thus, when the suction tool 6 is moved backward, the dust DS1, DS2, DS3 can be taken in over the entire width of the suction chamber Q2.

  Further, since the small diameter portion 17b is formed on the wheel 17, when the suction tool 6 is moved backward, the dust DS3 can be passed forward through the small diameter portion 17b, and the dust DS3 can be passed by the second rotary cleaning body 30. It can be easily taken into the suction chamber Q2 (see FIG. 6).

FIG. 12 is a bottom view schematically showing another effect of the suction tool.
As shown in FIG. 12, the first rotary cleaning body 20 and the second rotary cleaning body 30 are spaced apart from each other in the front-rear direction, and a gap S is formed between the first rotary cleaning body 20 and the second rotary cleaning body 30. Therefore, when the suction tool 6 is moved, the dust DS4 on the left and right (side) of the suction tool 6 can be taken into the suction chamber Q2 (see FIG. 6) from the gap S.

  Thus, since the 2nd rotary cleaning body 30 is continuously provided over the full width of the suction chamber Q2, it can reduce a possibility that dust (dust) may jump out from the suction chamber Q2 to the rear, and the suction chamber. The possibility that the sound in Q2 leaks and noise increases can be reduced. Further, since the second rotary cleaning body 30 is continuously provided over the entire width of the suction chamber Q2, the air tightness of the suction chamber Q2 is improved, so that the dust DS4 on the left and right (side) of the suction tool 6 is removed. The suction force taken into the suction chamber Q2 from the gap S can be increased.

  Note that the clearance S between the first rotary cleaning body 20 and the second rotary cleaning body 30 is such that the front-rear width D (see FIG. 2) of the suction body 11 is not excessive, and the suction tool 6 is laterally lateral. From the above, it can be set appropriately within a range that does not impair the suction of the dust DS4.

FIG. 13 is a schematic diagram showing the flow of cooling air inside the suction tool.
As shown in FIG. 13, by driving the electric blower 2a (see FIG. 1) of the cleaner body 2 (see FIG. 1), the air E1 sucked from the communication hole 11g1 (see FIG. 6) becomes the communication hole 11g1. Hitting the wall portion 11m standing on the back side of the motor, and proceeding to one end side (the right side in the figure) along the wall portion 11m, entering the electric motor 40 side, passing through the inside of the stator 41 from the opening 41c of the stator 41 of the electric motor 40, The electric motor 40 is cooled by being discharged from the opening 41 d of the stator 41.

  The air after cooling the electric motor 40 is sucked into the suction chamber Q2 (see FIG. 6) through the communication portion 18, as indicated by reference numeral E2. Moreover, the air after cooling the electric motor 40 is sucked into the communication hole 12a1 that communicates the space Q3 and the flow path R (see FIG. 3), as indicated by reference numeral E3. Moreover, the air after cooling the electric motor 40 is sucked into the first connecting portion 14 through the space Q3 and the inside of the shaft 14a, as indicated by reference numeral E4.

  Further, by driving the electric blower 2a (see FIG. 1) of the cleaner body 2 (see FIG. 1), the air E5 sucked from the communication hole 11g2 (see FIG. 7) is the other end along the wall portion 11m. After proceeding to the side (the left side in the figure), it wraps around to the side rear side of the circuit board 50, enters the circuit board 50 side from the communication hole 11n formed on the outer side of the circuit board 50 and formed in the wall, After flowing on the circuit board 50, it is sucked into the flow path R (see FIG. 3) via the communication portion 19.

  Thus, the motor 40 and the circuit board 50 can be cooled by taking the cooling air into the storage chamber Q1 (see FIGS. 6 and 7). In addition, the structure which flows this cooling air is an example, and if it is a structure which can cool the electric motor 40 and the circuit board 50, it will not be limited to this embodiment.

  As described above, the electric vacuum cleaner 1 of the first embodiment includes the suction chamber Q2 in which the first rotary cleaning body 20 and the second rotary cleaning body 30 are disposed, and the electric motor 40 disposed above the suction chamber Q2. And a suction case 10 having a partition wall 11c partitioned into a storage chamber Q1 for storing the circuit board 50, and the front end portion 40s of the electric motor 40 is positioned in front of the rear end portion 20s of the first rotary cleaning body 20. At the same time, an electric motor 40 is disposed on one end side in the axial direction of the rotary shaft 21 and a circuit board 50 is disposed on the other end side in the storage chamber Q1, and the second rotary cleaning body 30 extends from one end of the suction chamber Q2 to the full width of the other end. It is provided across.

  Thus, the suction case is formed by arranging the electric motor 40 and the circuit board 50 above the first rotary cleaning body 20, the electric motor 40 on one end side in the axial direction of the rotary shaft 21, and the circuit board 50 on the other end side. 10 can reduce the front-rear width D of the suction body 11 (see FIG. 2), so that the contact area between the suction body 11 and the floor M is reduced, and the friction between the floor M and the suction tool 6 is reduced. The operability of the user (such as being able to operate the suction tool 6 with a small force) can be improved.

  Moreover, since the second rotary cleaning body 30 is provided across the entire width from one end of the suction chamber Q2 to the other end, when the suction tool 6 is moved backward (when pulled backward), the mouthpiece main body 11 ( Dust can be sucked in from the floor M over the entire width behind the first rotary cleaning body 20).

  In addition, since the front-rear width D (see FIG. 2) of the mouthpiece main body 11 can be shortened, a narrower gap such as between a wall or between furniture when cleaning the left-right direction (longitudinal direction) of the mouthpiece body 11 in the moving direction. It can be inserted and cleaned.

  In the first embodiment, the second rotary cleaning body 30 is continuously formed from one end to the other end of the suction chamber Q2. According to this, it is possible to prevent the dust sucked from the front of the suction tool 6 from moving out to the rear of the second rotary cleaning body 30 when the suction tool 6 is advanced. Moreover, in 1st Embodiment, it can suppress that an operating sound leaks outside from the back of the suction tool 6. FIG.

  In the first embodiment, the second rotary cleaning body 30 is disposed away from the first rotary cleaning body 20. According to this, the dust on the side of the suction tool 6 can be sucked from the gap S between the first rotary cleaning body 20 and the second rotary cleaning body 30 (see FIG. 12). Thereby, it becomes possible to inhale dust from all the front, rear, left and right directions of the suction tool 6.

  Moreover, in 1st Embodiment, the 2nd rotation cleaning body 30 is comprised with respect to the suction case 10 so that attachment or detachment is possible (refer FIG. 8). According to this, since the 2nd rotary cleaning body 30 can be removed and performed from the suction case 10, the cleaning operation of the 2nd rotary cleaning body 30 becomes easy. Further, the type of the second rotary cleaning body 30, for example, a carpet brush body (brush) whose floor surface M is a carpet and a floor brush body (brush) whose floor surface M is flooring can be exchanged. Thus, the type of the second rotary cleaning body 30 can be changed according to the use environment, and efficient cleaning can be performed.

  In the first embodiment, the electric motor 40 is disposed at the upper rear of the first rotary cleaning body 20 such that the output shaft 40a of the electric motor 40 is positioned behind the rotary shaft 21 of the first rotary cleaning body 20. However, the front end portion 40s of the electric motor 40 may be configured to be positioned in front of the rear end portion 20s of the first rotary cleaning body 20. For example, the rotation shaft of the first rotary cleaning body 20 may be used. 21 and the output shaft 40a of the electric motor 40 may be arranged so as to overlap in the vertical direction, in other words, the electric motor 40 may be located directly above the first rotary cleaning body 20. Further, the output shaft 40a of the electric motor 40 may be positioned forward of the rotation shaft 21 of the first rotary cleaning body 20 as long as the front-rear width of the suction mouth body 11 is not impaired.

  Moreover, in 1st Embodiment, the lower end part 40t (refer FIG. 6) of the electric motor 40 is mentioned as an example, and is located in the perpendicular direction lower than the upper end part 20t (refer FIG. 6) of the 1st rotary cleaning body 20. Although demonstrated, the structure which the lower end part 40t of the electric motor 40 is located in the perpendicular direction upper direction rather than the upper end part 20t of the 1st rotary cleaning body 20 may be sufficient.

(Second Embodiment)
FIG. 14: is a bottom view which shows the suction tool of the vacuum cleaner which concerns on 2nd Embodiment of this invention. The suction tool 6A of the vacuum cleaner 1 according to the second embodiment has a configuration in which the second rotary cleaning body 30A is used instead of the second rotary cleaning body 30. Note that in the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

  As shown in FIG. 14, the second rotary cleaning body 30 </ b> A includes three rotary cleaning bodies 37 a, 37 b, and 37 c and is configured such that the respective axes are positioned on the same straight line L. One end of the rotary cleaning body 37a is rotatably supported by a bearing (not shown) on the bearing pressing member 31 side and the other end is supported by a bearing portion 37d formed on the suction mouth body 11. One end of the rotary cleaning body 37b is rotatably supported by a bearing portion 37d and the other end is rotatably supported by a bearing portion 37e formed in the suction mouth body 11. The rotary cleaning body 37c is rotatably supported at one end by a bearing portion 37e and at the other end by a bearing (not shown) on the bearing pressing member 32 side. In addition, the structure of each rotary cleaning body 37a, 37b, 37c is the same as that of the 2nd rotary cleaning body 30 of 1st Embodiment.

  According to the second embodiment, the second rotary cleaning body 30A (rotational cleaning bodies 37a, 37b, 37c) is provided from one end to the other end of the suction chamber Q2 (see FIG. 6). When the vehicle is moved backward, dust on the floor surface M behind the mouthpiece body 11 can be sucked over almost the entire width of the suction chamber Q2.

  Further, by configuring the second rotary cleaning body 30A with three rotary cleaning bodies 37a, 37b, 37c, for example, the density of the brush of the central rotary cleaning body 37b is increased to improve the airtightness, and the rotation on both sides is improved. It becomes easy to vary the specifications of the three rotary cleaning bodies according to the purpose, for example, by lowering the density of the brushes of the cleaning bodies 37a and 37c and facilitating suction of the dusts DS1 and DS2 behind.

  In the present embodiment, the case where the second rotary cleaning body 30A is configured by the three rotary cleaning bodies 37a, 37b, and 37c has been described as an example. Or four or more.

  In the present embodiment, the case where the axial lengths of the rotary cleaning bodies 37a, 37b, and 37c are all the same has been described as an example. However, different lengths, for example, the length of the rotary cleaning body 37b are used. May be configured to be longer than the lengths of the rotary cleaning bodies 37a and 37c.

  Moreover, the structure which makes the rotation cleaning body 37b of a center approach the 1st rotation cleaning body 20 side rather than the other rotation cleaning bodies 37a and 37c may be sufficient. Moreover, the structure which keeps the center rotary cleaning body 37b away from the 1st rotary cleaning body 20 side rather than the other rotary cleaning bodies 37a and 37c may be sufficient. Thereby, relatively large dust can be easily sucked into the flow path R (see FIG. 3).

(Third embodiment)
FIG. 15: is a bottom view which shows the suction tool of the vacuum cleaner which concerns on 3rd Embodiment of this invention. The suction tool 6B of the electric vacuum cleaner 1 according to the third embodiment has a configuration in which the second rotary cleaning body 30B is used instead of the second rotary cleaning body 30. Note that in the third embodiment, identical symbols are assigned to configurations similar to those in the first embodiment and redundant descriptions are omitted.

  As shown in FIG. 15, the suction tool 6B includes three rotary cleaning bodies 39a, 39b and 39c, and the left and right rotary cleaning bodies 39a and 39c are shifted to the front side and the central rotary cleaning body 39b is shifted to the rear side. It is a thing. Also, one end of the rotary cleaning body 39b and the other end of the rotary cleaning body 39a overlap in the front-rear direction, and the other end of the rotary cleaning body 39b and one end of the rotary cleaning body 39c overlap in the front-rear direction.

  The rotary cleaning body 39a is rotatably supported at one end thereof by a bearing (not shown) of the bearing pressing member 31 and at the other end thereof by a bearing portion 39d formed in the suction mouth body 11. One end of the rotary cleaning body 39c is rotatably supported by a bearing portion 39e formed on the suction mouth body 11, and the other end is rotatably supported by a bearing (not shown) of the bearing pressing member 32. One end of the rotary cleaning body 39b is rotatably supported by a bearing portion 39f formed near the connecting portion 12, and the other end is supported by a bearing portion 39g formed near the connecting portion 12.

  According to the third embodiment, the second rotary cleaning body 30B (rotational cleaning bodies 39a, 39b, 39c) is provided across the entire width of one end from the other end of the suction chamber Q2 (see FIG. 6). When the suction tool 6B is moved backward, dust on the floor M behind the suction body 11 can be sucked over the entire width of the suction chamber Q2.

  Thus, since the clearance between the rotary cleaning bodies 39a and 39b and the clearance between the rotary cleaning bodies 39b and 39c can be eliminated, the risk of dust (dust) jumping out from the suction chamber Q2 through the clearance can be reduced. Further, it is possible to reduce the possibility that noise in the suction chamber Q2 leaks and noise increases. Further, since the air tightness of the suction chamber Q2 is improved, the suction force for taking the dust DS4 on the left and right (side) of the suction tool 6 into the suction chamber Q2 from the gap S can be increased (see FIG. 12).

  The present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the gist of the present invention. For example, in each embodiment, the case where the second rotary cleaning body 30, 30 </ b> A, 30 </ b> B is arranged from one end to the other end in the axial direction of the first rotary cleaning body 20 has been described as an example. The cleaning body 30, 30 </ b> A, 30 </ b> B may be configured to be longer in the axial direction than the first rotary cleaning body 20. In this case, it is preferable to provide a flow path for guiding the dust scraped by the second rotary cleaning bodies 30, 30A, 30B to the suction chamber Q2 when the suction tools 6, 6A, 6B are moved backward.

DESCRIPTION OF SYMBOLS 1 Electric vacuum cleaner 2 Vacuum cleaner main body 2a Electric blower 2b Dust collection part 6, 6A, 6B Suction tool 10 Suction case 11c Partition 11d, 11e Bending part 20 1st rotary cleaning body 20s Rear end part 21 Rotating shaft 30, 30A, 30B Second rotating cleaning body 30a Shaft (shaft)
40 Electric motor 40a Output shaft 41s Front end 50 Circuit board (control board)
M Floor (cleaning surface)
Q2 Suction room Q1 Storage room

Claims (7)

An electric blower that generates a suction force, and a vacuum cleaner body having a dust collecting part that collects dust; and
A suction tool connected to the vacuum cleaner body,
The suction tool is
A first rotary cleaning body having a rotation axis parallel to the cleaning surface;
An electric motor having an output shaft parallel to the rotation shaft, and rotating the first rotary cleaning body;
A control board for controlling the electric motor;
A second rotary cleaning body disposed behind the first rotary cleaning body, having an axis parallel to the rotation axis, and in contact with the cleaning surface;
Suction case having a partition that is divided into a suction chamber in which the first rotary cleaning body and the second rotary cleaning body are disposed, and a storage chamber that is disposed above the suction chamber and houses the electric motor and the control board. And comprising
The second rotary cleaning body includes a brush body planted on an outer peripheral surface,
The partition includes a protrusion on a surface facing the second rotary cleaning body,
The second rotary cleaning body has a smaller contact resistance between the brush body and the protrusion than the contact resistance between the brush body and the floor surface when the suction tool is moved backward during rotation of the first rotary cleaning body. The rotation is regulated by the contact resistance between the brush body and the protrusion being larger than the contact resistance between the brush body and the floor surface when the suction tool is moved forward.
A front end portion of the electric motor is located in front of a rear end portion of the first rotary cleaning body, and the storage chamber has the electric motor on one end side in the axial direction of the rotary shaft and the control board on the other end side. Is placed,
The vacuum cleaner, wherein the second rotary cleaning body is provided at least from the one end to the other end of the suction chamber.   The vacuum cleaner according to claim 1, wherein the second rotary cleaning body is formed continuously from the one end to the other end.   The second rotary cleaning body includes three rotary cleaning bodies configured such that the respective axes are positioned on the same straight line,
  The electric vacuum cleaner according to claim 1, wherein the brush density of the brush body of the central rotary cleaning body is higher than the brush density of the brush bodies of the left and right rotary cleaning bodies.   The second rotary cleaning body includes three rotary cleaning bodies arranged side by side in the axial direction,
  The central rotary cleaning body is arranged so as to be shifted rearward from the left and right rotary cleaning bodies, and both ends of the central rotary cleaning body overlap with the ends of the left and right rotary cleaning bodies in the front-rear direction. The vacuum cleaner according to claim 1, wherein the vacuum cleaner is provided. The vacuum cleaner according to any one of claims 1 to 4, wherein the second rotary cleaning body is disposed apart from the first rotary cleaning body. The vacuum cleaner according to any one of claims 1 to 5 , wherein the second rotary cleaning body is configured to be detachable from the suction case. A first rotary cleaning body having a rotation axis parallel to the cleaning surface;
An electric motor having an output shaft parallel to the rotation shaft, and rotating the first rotary cleaning body;
A control board for controlling the electric motor;
A second rotary cleaning body disposed behind the first rotary cleaning body, having an axis parallel to the rotation axis, and in contact with the cleaning surface;
Suction case having a partition that is divided into a suction chamber in which the first rotary cleaning body and the second rotary cleaning body are disposed, and a storage chamber that is disposed above the suction chamber and houses the electric motor and the control board. And comprising
The second rotary cleaning body includes a brush body planted on an outer peripheral surface,
The partition includes a protrusion on a surface facing the second rotary cleaning body,
In the second rotary cleaning body, when the first rotary cleaning body rotates, the contact resistance between the brush body and the protrusion becomes smaller than the contact resistance between the brush body and the floor surface when the suction tool is moved backward. The rotation is regulated by the contact resistance between the brush body and the protrusion being larger than the contact resistance between the brush body and the floor when the suction tool is moved forward,
A front end portion of the electric motor is located in front of a rear end portion of the first rotary cleaning body, and the storage chamber has the electric motor on one end side in the axial direction of the rotary shaft and the control board on the other end side. Is placed,
The suction tool, wherein the second rotary cleaning body is provided at least from the one end to the other end of the suction chamber.

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